WO2016119136A1 - 个人清洁护理用具 - Google Patents

个人清洁护理用具 Download PDF

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Publication number
WO2016119136A1
WO2016119136A1 PCT/CN2015/071696 CN2015071696W WO2016119136A1 WO 2016119136 A1 WO2016119136 A1 WO 2016119136A1 CN 2015071696 W CN2015071696 W CN 2015071696W WO 2016119136 A1 WO2016119136 A1 WO 2016119136A1
Authority
WO
WIPO (PCT)
Prior art keywords
transducer
permanent magnet
elastic member
drive shaft
permanent magnets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/071696
Other languages
English (en)
French (fr)
Inventor
戴晓国
徐振武
戴翎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Shift Electrics Co Ltd
Original Assignee
Shanghai Shift Electrics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Shift Electrics Co Ltd filed Critical Shanghai Shift Electrics Co Ltd
Priority to JP2017540626A priority Critical patent/JP6505855B2/ja
Priority to CA2975155A priority patent/CA2975155C/en
Priority to ES15879347T priority patent/ES2783549T3/es
Priority to KR1020177021222A priority patent/KR101971043B1/ko
Priority to US15/547,460 priority patent/US10463460B2/en
Priority to PCT/CN2015/071696 priority patent/WO2016119136A1/zh
Priority to EP15879347.1A priority patent/EP3252935B1/en
Publication of WO2016119136A1 publication Critical patent/WO2016119136A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/221—Control arrangements therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/34—Reciprocating, oscillating or vibrating parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/09—Structural association with bearings with magnetic bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1006—Brushes for cleaning the hand or the human body
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1033—Brush for applying or spreading shaving foam or soap
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the present invention relates to an appliance for personal cleansing care, and more particularly to personal care implements such as electric toothbrushes, electric shavers, electric cleansers, electric showers, and the like.
  • a number of drive structures for driving cleaning elements are known. For example, motors, magnetic systems, and electromagnetic systems. Some drive structures use bearings (such as ball bearings) to support the drive, which is expensive and complicated, as well as noise and motor damping.
  • CN 100591301C discloses a device for converting a lateral movement into a rotational movement of an appliance workpiece, wherein the drive assembly comprises an electromagnet that produces a lateral force, which in operation is combined with two permanent magnets, the permanent magnet being fixed to the movement.
  • the movable end piece of the rear end of the conversion assembly is adapted to move the end piece by a laterally slightly curved translation.
  • Two permanent magnets are relatively fixedly mounted to the end piece.
  • the motion conversion assembly converts the drive action of the drive assembly into a torsional or rotational motion of the drive shaft by providing a leaf spring that in turn rotates the brush head arm and the brush head to rotate about the longitudinal axis of the drive shaft.
  • CN101297775B discloses a method of adjusting the elastic member of a resonance drive system, wherein the spring member is not bent, and its resonance frequency is changed by sufficiently changing the rigidity of the elastic member so as to be very close to the driving frequency of the appliance.
  • the technical problem to be solved by the present invention is to provide a personal cleaning care appliance which is simple and compact in structure, low in cost, convenient in assembly, stable in rotation, and noisy. Small, low damping and safe and reliable.
  • the present invention provides a personal care appliance comprising: a handle including a handle housing having a power supply portion for providing power to various portions of the personal care appliance for controlling the individual Various working modes of the cleaning care appliance and a control portion for opening or closing the personal cleaning care appliance, a triggering portion for starting or closing the operation of the cleaning care appliance, and a driver for converting the input electrical energy into a mechanical energy output, the driver including the replacement a driver, a drive coil, a drive coil core disposed in the drive coil, a driver left bracket for supporting the driver, and a driver right bracket; the cleaning assembly including the cleaning component carrier and the cleaning component distributed on the cleaning component carrier The cleaning assembly is detachably coupled to the drive shaft; wherein the transducer includes a drive shaft inserted into the cleaning assembly, at least one transducer elastic member secured to the left and right brackets of the driver, at least two relative Permanent magnets arranged on the left and right sides of the longitudinal axis of the drive shaft, a corresponding permanent magnet bracket
  • the polarity of the magnetic pole is opposite to the polarity of the magnetic pole of the left permanent magnet, and the left and right permanent magnets are disposed such that the angle between their internal magnetic line directions and the longitudinal axis direction of the driving coil core is greater than 45°, respectively. And less than 135°, the left and right permanent magnets are movable relative to the transducer elastic member fixing member; when the driving coil passes the alternating current of frequency f0, the moving directions of the left and right permanent magnets and the driving coil core Approximate longitudinal axis direction Row, i.e., the angle between the two is more than 170 ° and smaller than 190 ° or more than -10 ° and smaller than 10 °.
  • the left and right permanent magnets are disposed such that the angle between the direction of their internal magnetic lines and the direction of the longitudinal axis of the driving coil core is greater than 45° and less than 135°, between the left and right permanent magnets
  • the direction of the magnetic line of force formed through the driving coil and the direction of the magnetic field line of the coil formed by the energized driving coil are spaces greater than 45° and less than 135°, that is, the mutual interference generated between the magnetic field axis generated by the driving coil and the permanent magnetic field axis is small. . That is to say, the mutual interference of the above two magnetic fields is small.
  • the magnetic field generated by the driving coil changes accordingly, but due to the magnetic field axis of the driving coil and the permanent magnetic field
  • the axis interference is small, and the influence of the magnetic field change generated by the driving coil on the permanent magnetic field is very limited.
  • Icos ⁇ t is the current flowing through the conductor
  • L is the effective length of the conductor in the permanent magnet field
  • N is the total number of conductors
  • ⁇ is the electrical angular velocity of the current change
  • t is the time, known by the electromagnetic force formula, if N , B, L are unchanged, then F is only related to Icos ⁇ t.
  • the present invention creatively introduces at least two transducer elastic members, which are a left transducer elastic member and a right transducer elastic member, respectively, and the bending strain of the elastic material is used to form a natural vibration frequency f solid.
  • the smooth rotation of the transducer can be realized, thereby eliminating the restriction members (such as bearings) which must be provided in order to realize the rotational rotation of the cleaning tool.
  • Electromagnetic force on the transducer due to proper configuration of the permanent magnet Approximating to zero, and clever use of the torque acting on the transducer, the constraining structure can be eliminated, thus making the cleaning appliance more compact, smoother and less noisy.
  • the cleaning implement of the present invention is less noisy and more efficient than a structure in which only one transducer elastic member is provided.
  • the left and right permanent magnets are disposed such that their internal magnetic field lines and the direction of the longitudinal axis of the drive coil core are at an angle of 90°.
  • the direction of the magnetic lines of force formed between the left and right permanent magnets in the present invention and the direction of the magnetic lines of the coil formed by the energized driving coil intersect at a space of 90°, that is, the magnetic field axis and the permanent magnet generated by the driving coil.
  • the magnetic field axes are orthogonal. The orthogonality of the above two magnetic fields can be understood as the two magnetic fields do not interfere with each other.
  • the magnetic field generated by the driving coil changes accordingly, but due to the magnetic field axis of the driving coil It is orthogonal to the axis of the permanent magnet field, and the change in the magnetic field generated by the drive coil does not affect the permanent magnetic field.
  • Icos ⁇ t is the current flowing through the conductor
  • L is the effective length of the conductor in the permanent magnet field
  • N is the total number of conductors
  • ⁇ is the electrical angular velocity of the current change
  • t is the time, known by the electromagnetic force formula, if N , B, L are unchanged, then F is only related to Icos ⁇ t.
  • the above-mentioned orthogonal magnetic field can ensure that B is unchanged, and the internal structure of the cleaning device can also ensure that N and L are unchanged.
  • the cos ⁇ t curve is a smooth curve, that is, the electromagnetic force is a continuous gradual change without a sudden physical quantity, thereby ensuring that the cleaning tool is driven by the electromagnetic force F to achieve a smooth and non-impact motion, that is, the acceleration of the motion is not abrupt.
  • the transducer left side drive arm of the personal care implement of the present invention, the left permanent magnet and the corresponding permanent magnet bracket on the same side of the drive shaft with respect to the longitudinal axis of the drive shaft are fixed and in relation to the longitudinal axis of the drive shaft
  • a portion below the left transducer elastic member on the same side of the transmission arm is defined as a lower left portion of the transducer
  • the transducer right arm, the right permanent magnet, and the corresponding permanent magnet bracket are fixed and Under the right transducer elastic Partially defined as the lower right portion of the transducer, at least one gap between the lower left portion of the transducer and the lower portion of the right side of the transducer (two gaps in the present invention), the gap being sufficient to compensate for the imbalance due to A magnetic field force that causes the transducer to translate and allows at least one permanent magnet to move relative to another permanent magnet of opposite polarity.
  • This technical solution fully considers the difference of the magnetic force of each group caused by the error or other interference factors in the manufacture of the personal cleaning appliance in the past, thereby destroying the state of the balance of the stress of the personal cleaning care appliance transducer, and the imbalance The stressed transducer will produce a tendency to move in addition to the rotational motion, thereby losing energy and generating noise. Therefore, this technical solution can adopt the two gaps, and effectively correct the above-mentioned imbalance force by changing the distance of the gap, thereby making the movement of the personal cleaning care appliance more stable.
  • the length of the gap between the lower left portion of the transducer and the lower portion of the right side of the transducer is 0.1 mm to 2 mm. More preferably, the gap has a length of 0.2 mm to 1 mm.
  • the function of adjusting the imbalance force of the gap can be more effectively exerted, and the above-described imbalance force can be better corrected, thereby making the movement of the personal care appliance more stable.
  • the permanent magnet in the present invention may be a rectangular parallelepiped NdFeB permanent magnet, preferably having a length of about 5 mm to 30 mm, a width of about 2 mm to 20 mm, and a height of about 1 mm to 10 mm.
  • Such permanent magnets have the advantages of convenient processing, high standardization and high degree of standardization, and are easy to be industrialized.
  • different sizes of such permanent magnets can be used according to different sizes of personal cleaning care appliances to meet different types of personal cleaning care appliances. need.
  • the transducer can also be provided with four permanent magnets, the left permanent magnet and the right permanent magnet are arranged such that the magnitude of the reaction forces they receive are approximately equal, the amplitude difference is within about 10%, and the direction is approximately opposite, the direction The angle is within 10 °.
  • the drive shaft is subjected to an approximately alternating balance force, and the alternating balance force generates an alternating torque, thereby forming a high-speed reciprocating and efficient rotation of the drive shaft.
  • the transducer elastic member comprises a rectangular elastic member or a sheet-shaped elastic member.
  • the rectangular elastic member or the sheet-shaped elastic member has the advantages of high versatility, easy production and processing, low price, easy to obtain and replace, and has a good service life and can be reliably
  • the ground continuously absorbs energy and releases energy to ensure the normal and smooth operation of personal cleaning and care appliances.
  • the transducer may be provided with two transducer elastic members symmetrically distributed on the left and right sides of the longitudinal axis of the drive shaft, the angle between the two transducer elastic members being 180°; the left transducer The elastic member and the right transducer elastic member are disposed such that their bending section coefficients and lengths are approximately equal, and the amplitude difference is within 10%, so that the deflection of the left transducer elastic member and the right transducer elastic member are The deflection amplitudes are approximately equal, the amplitude difference is within 10%, and the respective deflection directions are opposite.
  • the drive shaft is subjected to an approximately alternating balance force, and the alternating balance force generates an alternating torque, thereby forming a high-speed reciprocating and efficient rotation of the drive shaft.
  • the number of transducer elastic members may be multiple.
  • the optimized technical solution can make the amplitude difference of the force acting on the drive shaft of the left and right transmission arms of the transducer within 10%, the direction of the force is opposite, and the left and right transmission arms are longitudinal to the drive shaft.
  • the torque of the axis is approximately the same, and the direction of the torque is also the same, so that the drive shaft drives the cleaning element carrier and the cleaning element to reciprocate smoothly and at high speed.
  • the personal cleansing care appliance comprises an electric toothbrush, an electric shaver, an electric cleansing device, an electric shower, and other appliances having similar functions.
  • Figure 1 is a front elevational view of the personal care implement of the present invention
  • Figure 2 is a side elevational, partial cross-sectional view of the personal care implement of Figure 1;
  • Figure 3 shows a front view of the drive shown in Figure 2;
  • Figure 4 is an exploded view of the driver shown in Figure 3;
  • Figure 5 is a perspective view of the transducer
  • Figure 6 is a perspective view of the drive coil shown in Figure 4.
  • Figure 7 is a schematic view showing a combined state of a transducer and a driving coil
  • FIG. 8A is a schematic diagram showing the principle of the current direction of the secondary winding of the driving coil and the direction of the force of the permanent magnet shown in FIG. 7;
  • 8B is a schematic explanatory diagram of a magnetic field force of a driving coil and a permanent magnet
  • Figure 9 is a perspective view of the first modified transducer
  • Figure 10 is a perspective view of the transducer of Figure 9 as seen from another angle;
  • Figure 11A is a schematic view showing the combined state of the transducer and the modified driving coil shown in Figure 9;
  • FIG. 11B is a schematic diagram showing the principle of the current direction of the secondary winding of the driving coil and the direction of the force receiving of the permanent magnet shown in FIG. 11A;
  • Figure 12 is a perspective view of the modified drive coil shown in Figure 11A;
  • Figure 13 is a schematic view showing a combined state of a second modified transducer and a modified drive coil
  • Figure 14 is a schematic view showing the combination of the modified transducer elastic members.
  • 109 is a rechargeable battery
  • 112 is the left side bracket of the drive
  • 129 is the lower gap between the lower left portion of the transducer and the lower right portion of the transducer
  • 131 is the upper gap between the lower left portion of the transducer and the lower right portion of the transducer
  • 215 is the first variant transducer variant drive coil core
  • 234 is the upper gap between the lower left portion of the first modified transducer and the lower portion of the right side of the transducer
  • 235 is a lower gap between the lower left portion of the first modified transducer and the lower portion of the right side of the transducer
  • 311 is the second modified transducer drive shaft
  • 314 is a second variant transducer variant drive coil
  • 315 is a second variant transducer variant driving coil core
  • 317 is the lower left permanent magnet of the second modified transducer
  • 318 is the lower right permanent magnet of the second modified transducer
  • 319 is the upper right permanent magnet of the second modified transducer
  • 322 is the second modified transducer left transducer elastic member
  • 323 is the second modified transducer right transducer elastic member
  • 324 is the second modified transducer left transducer elastic member fixing member
  • 325 is the second modified transducer right transducer elastic member fixing member
  • 326 is the second modified transducer left arm
  • 327 is the second modified transducer right arm
  • 329 is the lower left permanent magnet bracket of the second modified transducer
  • 331 is the lower right permanent magnet bracket of the second modified transducer
  • 332 is the upper gap between the lower left portion of the second modified transducer and the lower portion of the right side of the transducer
  • 333 is a lower gap between the lower left portion of the second modified transducer and the lower portion of the right side of the transducer
  • 334 is the gap between the left side of the second modified transducer and the right side of the transducer
  • Exemplary embodiments of the present invention are described in more detail below with a power toothbrush as a typical example of a personal care implement and in conjunction with the drawings. Although the following description will be made by taking only an electric toothbrush as an example, the present invention is not limited thereto. The present invention is also applicable to appliances for personal cleaning care such as electric shavers, electric cleansers, and electric showers.
  • the direction facing the corresponding view in a direction perpendicular to the longitudinal axis of the drive shaft is defined as "left” on the left side of the longitudinal axis of the drive shaft, and the right side is defined as “right”;
  • Toward refers to the direction perpendicular to the longitudinal axis of the drive shaft;
  • Outward refers to the direction perpendicular to the paper surface toward the operator;
  • Inward refers to the direction perpendicular to the paper surface away from the operator.
  • an appliance for personal care care such as an electric toothbrush
  • a handle 1 and a cleaning assembly that is removably mounted (e.g., in a snap-fit manner) on the handle 1.
  • the handle 1 includes a handle housing 105.
  • the cleaning assembly comprises a cleaning element carrier 2, a cleaning element 3 distributed on the cleaning element carrier 2, and the cleaning element 3 may be an item such as a bristles.
  • a cleaning assembly (such as a brush head) is detachably coupled to the drive shaft 111 via a cleaning assembly, for example, in a snap-fit manner, and the snap-fit coupling can reliably couple the drive handle 1 and the cleaning assembly together, and can also be conveniently separated and driven.
  • Handle 1 and cleaning assembly is detachably coupled to the drive shaft 111 via a cleaning assembly, for example, in a snap-fit manner, and the snap-fit coupling can reliably couple the drive handle 1 and the cleaning assembly together, and can also be conveniently separated and driven.
  • the inside of the handle housing 105 is provided with a power supply portion, a control portion, a trigger portion, and a driver.
  • the power supply portion generally includes a rechargeable battery 109 and a charging circuit for supplying power to various parts of the appliance;
  • the control portion includes a control circuit board 107 for controlling various operating modes of the electric toothbrush and turning on or off the electric toothbrush, etc.;
  • the portion includes a switch 106 for activating and deactivating the operation of the electric toothbrush; the function of the driver is to convert the input electrical energy into mechanical energy of the output.
  • the handle 1 further includes a charging coil 108 housed in the handle housing 105, a rechargeable battery 109, a control circuit board 107, a switch 106 mounted on the control circuit board 107, a switch button 104 attached to the handle housing 105, and a fixed
  • the driver 110 in the handle housing 105, and the seal 103, the control circuit board 107 is in electrical communication with the switch 106 and the driver 110.
  • the switch button 104 is coupled to the switch 106, and the switch 106 is actuated by operating the switch button 104.
  • One end of the sealing member 103 is coupled to the cleaning member carrier 2, and sealed The other end of the member 103 is coupled to the driver 110 for use as a waterproof seal.
  • the driver 110 includes a transducer 130, a driving coil 114, and a driving coil core 115 having a high magnetic permeability characteristic disposed in a hollow portion of the driving coil 114 in a direction perpendicular to a longitudinal axis of the driving shaft.
  • the driver left side bracket 112 and the driver right side bracket 113 and the fastening screw 127 of the support driver 110, the driver left side, right side brackets 112, 113 and the transducer elastic member fixing member 124 of the transducer 130 pass the fastening screws 127 fastened together.
  • the transducer 130 includes a drive shaft 111, a transducer elastic member fixing member 124, left and right transducer elastic members 122 and right side transducer elastic members 123 respectively located on the left and right sides of the longitudinal axis of the drive shaft, and a transducer left Side and right side transmission arms 125 and 126, left and right permanent magnets 116 and 117, and left and right permanent magnet brackets 118 and 119, clips between left and right side transducer elastic members 122 and 123
  • the angle can be 180°.
  • the left and right transducer elastic members 122, 123 may be coupled to the transducer elastic member fixing member 124 by injection molding, or may be injection molded by a single elastic member and the transducer elastic member fixing member 124.
  • the left and right transducer elastic members 122 and 123 are formed by using a single elastic member, since the force directions of the left and right transducer elastic members 122 and 123 are different, it is still possible. It is considered to be composed of two elastic members.
  • the cleaning assembly is detachably inserted into the drive shaft 111 such that the transducer 130 is coupled with the cleaning assembly.
  • One ends of the left transducer elastic member 122 and the right transducer elastic member 123 are respectively fixed to the transducer elastic member fixing member 124, and the left transducer elastic member 122 and the right transducer elastic member The other end of the 123 is fixed to the left and right transmission arms 125, 126 of the transducer, respectively.
  • the transmission arms 125, 126, the drive shaft 111 and the transducer spring fastener 124 are fixed.
  • the transducer elastic member fixing member 124 is fixed to the driver left and right side brackets 112, 113 by fastening screws 127 and fixed to the handle 1.
  • the above parts can be integrally molded by injection or assembled by mechanical
  • the left and right permanent magnets 116 and 117 of the transducer 130 enclose a hollow region with the left and right permanent magnet brackets 118 and 119 for receiving the drive coil 114 and the drive coil core 115.
  • the portion of the transducer left side transmission arm 125, the left side permanent magnet 116, and the left side permanent magnet bracket 118 that are fixed and below the left side transducer elastic member 122 is referred to as the left lower portion of the transducer.
  • the transducer right side transmission arm 126, the right side permanent magnet 117, and the right permanent magnet bracket 119 are fixed and the lower portion of the right side transducer elastic member 123 is referred to as the lower right portion of the transducer.
  • the transducer 130 is provided with a drive shaft 111 in the direction of the cleaning assembly.
  • the drive shaft 111 and the cleaning assembly are detachably assembled.
  • the motion analysis is performed in conjunction with the transducer 130 below.
  • the control system in the handle 1 activates the drive coil 114, and the left primary winding 120 and the right primary winding 121 of the drive coil 114 alternately pass.
  • An alternating current with a frequency of f0/2.
  • the magnetic field formed by the left permanent magnet 116 and the right permanent magnet 117 of the transducer 130 interacts with the energized drive coil 114 to generate an electromagnetic force.
  • the electromagnetic forces received on the transducer 130 are substantially balanced and a torque M is produced.
  • the direction of the torque M on the transducer 130 is also alternating. It is assumed that in the initial state, the direction of the torque M of the transducer is clockwise. Since the transducer elastic member fixing member 124 is fixed to the left and right side brackets 112, 113 of the driver, the left side transmission arm 125 of the transducer drives the left transducer elastic member 122 to bend in the clockwise direction, and the left side is changed. The elastic member 122 undergoes a bending strain to store energy, and the left transducer elastic member 122 is bent in a clockwise direction around the transducer elastic member fixing member 124.
  • the right side transmission arm 126 of the transducer drives the right transducer elastic member 123 to bend in the clockwise direction, and the right transducer elastic member 123 is bent and strained, and the storage energy is stored.
  • the right transducer elastic member 123 also flexes in a clockwise direction about the transducer spring fastener 124. Therefore, the transducer 130 reciprocally rotates in response to the drive of the drive coil 114 in the outer casing 105 of the handle 1.
  • the cleaning element 3 is coupled to the transducer 130 by the cleaning element carrier 2, which drives the cleaning element 3 to reciprocate.
  • At least two transducer elastic members are separately introduced, which are a left transducer elastic member 122 and a right transducer elastic member 123, respectively, and the bending strain of the elastic material is used to form a natural vibration frequency f solid.
  • the energy device 130 when the natural frequency f of the transducer 130 is very close to the driving frequency f0, the electromagnetic force generated by the driving coil 114 in the handle housing 105 and acting on the transducer 130 causes the transducer 130 to be in a resonant state.
  • the electromagnetic force generated by the drive coil 114 in the handle housing 105 and acting on the transducer 130 causes the transducer 130 to be in a resonant state. It is well known that energy transfer efficiency in a resonant state or a resonant state is very high.
  • a constraint such as a bearing is provided to prevent the cleaning device from moving in addition to the rotational motion, but this constraint will bring noise and energy loss, also Increased costs.
  • the smooth rotation of the transducer 130 can be realized, thereby eliminating the restriction members (such as bearings, etc.) that must be provided in order to realize the rotational rotation of the cleaning tool. Since the proper arrangement of the permanent magnets causes the electromagnetic resultant force on the transducer 130 to be approximately zero, and the torque acting on the transducer 130 is skillfully utilized, the constraining structure can be omitted, thereby making the cleaning device structure more compact and rotating. Smoother and less noisy. Furthermore, the cleaning implement of the present invention is less noisy and more efficient than a structure in which only one transducer elastic member is provided.
  • the secondary winding 128 of the drive coil 114 When the left primary winding 120 of the drive coil 114 passes current and the right primary winding 121 of the drive coil 114 does not pass current, the secondary winding 128 of the drive coil 114 generates an induced electromotive force, driving the secondary winding 128 of the coil 114 with an external circuit. A closed loop is formed, so that the secondary winding 128 of the drive coil 114 also produces an induced current 11.
  • an induced current 12 is generated at the secondary winding 128 of the drive coil 114.
  • two movable and mutually independent left and right permanent magnets 116, 117 are distributed along both sides of the longitudinal axis of the drive shaft.
  • the polarities of the two permanent magnets 116, 117 in the direction toward the drive coil 114 are opposite.
  • the left and right permanent magnets 116, 117 may be disposed such that the angle between their internal magnetic field lines and the longitudinal axis direction of the drive coil core 115 is greater than 45° and less than 135°, preferably the included angle is 90°.
  • the included angle is 90°.
  • the longitudinal direction of the drive coil core 115 is in the direction perpendicular to the inward or outward direction of the paper, at which time the longitudinal axis direction of the drive coil core 115 and the longitudinal axis of the drive shaft are perpendicular to each other.
  • the left and right permanent magnets 116, 117 are disposed such that the angle between their inner magnetic field lines and the longitudinal axis direction of the driving coil core 115 is 90°, and the left and right permanent magnets 116, 117 are formed.
  • the direction of the magnetic lines of force passing through the driving coil and the direction of the magnetic lines of force of the coil formed by the energized driving coil intersect at a space of 90°, that is, the axis of the magnetic field generated by the driving coil 114 and the axis of the permanent magnetic field are orthogonal.
  • the orthogonality of the above two magnetic fields can be understood as the two magnetic fields do not interfere with each other.
  • the magnetic field generated by the driving coil 114 changes accordingly, but because of the driving coil 114
  • the magnetic field axis is orthogonal to the permanent magnetic field axis, and the change in the magnetic field generated by the drive coil 114 does not affect the permanent magnetic field.
  • Icos ⁇ t is the current flowing through the conductor
  • L is the effective length of the conductor in the permanent magnetic field
  • N is the total number of conductors
  • ⁇ is the electrical angular velocity of the current change
  • t is the time, known by the electromagnetic force formula, if N, B, L are unchanged, then F is only related to Icos ⁇ t.
  • the above-mentioned orthogonal magnetic field can ensure that B is unchanged, and the internal structure of the cleaning device is also It can guarantee that N and L are unchanged.
  • the cos ⁇ t curve is a smooth curve, that is, the electromagnetic force is a continuous gradient without a sudden physical quantity, thereby ensuring that the cleaning tool is driven by the electromagnetic force F to achieve a smooth and non-impact motion, that is, the acceleration of the object motion is not abrupt.
  • FIG. 8B In order to more clearly analyze the advantages of the above-described orthogonal magnetic field, the case where the magnetic field axis of the permanent magnet and the magnetic field axis of the drive coil 114 are parallel or coincident are specifically analyzed by FIG. 8B.
  • the permanent magnets are distributed over the drive coil 114A such that the direction of the magnetic flux inside the permanent magnet and the longitudinal axis of the drive coil core 115A (which points upward or downward along the paper as shown in Fig. 8B).
  • the longitudinal direction of the drive coil core 115A and the longitudinal axis of the drive shaft are parallel to each other.
  • the axis of the magnetic field generated by the driving coil 114A is parallel to the axis of the permanent magnet magnetic field, and the magnetic field generated by the driving coil 114A and the magnetic field of the permanent magnet interfere with each other, and the magnitude and direction of the magnetic field generated by the driving coil 114A vary with the magnitude and direction of the current of the driving coil 114A.
  • the mutual interference of the two magnetic fields causes the magnetic field of the air gap between the permanent magnet and the driving coil 114A to be deformed with time, so that the magnetic field density B in the air gap is distorted, resulting in a magnetic field density B on both sides of the longitudinal axis of the driving shaft.
  • symmetry Since the magnitude of the magnetic field density B affects the magnitude of the electromagnetic force, the magnetic field of the permanent magnet that interferes with each other and the magnetic field of the driving coil 114A cause a force imbalance on the left and right permanent magnets, thereby causing the transducer of the cleaning appliance to rotate.
  • the movement also produces translational motion, which in turn causes noise and inefficiency in cleaning appliances.
  • the magnetic field force may be an attractive force or a repulsive force.
  • the magnetic field force and the permanent magnet and the driving coil are known.
  • the square of the distance of the iron core 115A is inversely proportional. As shown in FIG. 8B, the left permanent magnet 116A moves to the left under the action of the magnetic force F4, the distance between the permanent magnet and the driving coil core 115A becomes larger, the magnetic field force F4 becomes smaller, and the right permanent magnet 117A is in the magnetic field force F3.
  • the distance between the permanent magnet and the driving coil core 115A becomes small, and the magnetic field force F3 becomes large.
  • the change of F4 and F3 causes a component force in the direction parallel to the longitudinal axis of the driving coil core 115A, and this component is an alternating variable, thereby causing the cleaning tool transducer to be along the longitudinal direction of the driving coil core 115A. Vibration, noise and energy loss in the axial direction.
  • the alternating magnetic field generated by the driving coil 114A continuously magnetizes and demagnetizes the permanent magnets 116A, 117A.
  • the left permanent magnet 116A is in a demagnetized state, and the right side is always The magnet 117A is in a magnetization state.
  • hysteresis losses occur due to the hysteresis effect of the permanent magnets 116A, 117A. This hysteresis loss causes energy loss, thereby reducing the efficiency of the cleaning appliance.
  • the magnetization and demagnetization impose higher requirements on the materials and properties of the permanent magnets 116A, 117A.
  • the demagnetization magnetic field strength is greater than the coercive force of the permanent magnet, the permanent magnet will be demagnetized. Loss of magnetism, therefore, in applications where the axis of the magnetic field generated by the drive coil 114A is parallel or overlapping with the magnetic field axis of the permanent magnet, the coercive force of the permanent magnet is greater than the strength of the magnetic field generated by the drive coil 114A, thereby constraining the permanent magnets 116A, 117A and The selection of drive coil 114A.
  • the arrangement of the permanent magnet field axis orthogonal to the magnetic field axis of the drive coil 114 may overcome the above disadvantages, as compared to the magnetic field axis arrangement of the permanent magnet body axis parallel or overlapping the drive coil 114A, thereby enabling The cleaning implement moves more smoothly and without impact, and has a higher efficiency while expanding the selection range of the permanent magnets 116, 117 and the drive coil 114.
  • the permanent magnets 116 and 117 may be NdFeB permanent magnets having a length, width, and height of 5 to 30 mm, 2 mm to 20 mm, and 1 mm to 10 mm, respectively.
  • the left permanent magnet 116 receives a reaction force perpendicular to the outer side of the paper
  • the right permanent magnet 117 receives a reaction force perpendicular to the inner side of the paper.
  • the left transducer elastic member 122 is oriented parallel to the direction of the magnetic field lines inside the left permanent magnet 116 along the axis of the transducer spring fastener 124 directed toward the transducer left actuator arm 125.
  • the axis of the right transducer elastic member 123 in the direction of the transducer elastic member fixing member 124 directed toward the transducer right side transmission arm 126 is parallel to the direction of the magnetic field lines inside the right permanent magnet 117.
  • the left and right transducer elastic members 122, 123 are parallel to each other and in the same plane.
  • the left permanent magnet 116 and the left transducer elastic member 122 constitute a vibration system by the above structure, and when the left permanent magnet 116 is oriented perpendicular to the paper surface When the reaction force is outward, the left permanent magnet 116 tends to move perpendicularly to the outward direction of the paper.
  • the left permanent magnet 116 is constrained by the left transducer elastic 122.
  • the left transducer elastic member 122 When the left transducer elastic member 122 is subjected to a force or component force perpendicular to the inward or outward direction of the paper, or a torque upward or downward in the direction of the paper, in the vicinity of the left side of the transducer arm 125, The left transducer elastic member 122 produces a bending deformation about an axis with the boundary between the left transducer elastic member 122 and the transducer elastic member fixing member 124 as an axis.
  • the left transducer elastic member 122 is preferably disposed such that the angle of rotation corresponding to the deflection of the left transducer elastic member 122 is less than 10°.
  • the left permanent magnet 116 when the left permanent magnet 116 receives a reaction force perpendicular to the outward direction of the paper, the left permanent magnet 116 moves in a direction perpendicular to the outward direction of the paper and conforms to the deflection motion of the left transducer elastic member 122. It can also be understood that the left permanent magnet 116 moves in an outward direction perpendicular to the paper, and the moving direction is approximately parallel to the longitudinal axis direction of the driving coil core 115, that is, the angle is greater than 170° and less than or equal to 180° or Greater than -10° and less than or equal to 0°.
  • the right permanent magnet 117 when the right permanent magnet 117 is subjected to a reaction force perpendicular to the inside of the paper, the right permanent magnet 117 tends to move in a direction perpendicular to the inward direction of the paper.
  • the right permanent magnet 117 is constrained by the right transducer elastic member 123.
  • the right transducer elastic member 123 is subjected to a force or component force perpendicular to the inward or outward direction of the paper, or a torque upward or downward in the direction of the paper, in the vicinity of the transducer right arm 126 region.
  • the right transducer elastic member 123 generates a bending deformation about an axis with the boundary between the right transducer elastic member 123 and the transducer elastic member fixing member 124 as an axis.
  • the right transducer elastic member 123 is preferably disposed such that the angle of rotation corresponding to the deflection of the right transducer elastic member 123 is less than 10°. Therefore, when the right permanent magnet 117 receives a reaction force in a direction perpendicular to the inward direction of the paper, the right permanent magnet 117 moves in a direction perpendicular to the inward direction of the paper and conforms to the deflection motion of the right transducer elastic member 123.
  • the right permanent magnet 117 moves in an inward direction perpendicular to the paper, the direction of motion and the longitudinal axis direction of the drive coil core 115 (ie, pointing in the direction perpendicular or perpendicular to the paper as shown in FIG. 7). ) is approximately parallel, that is, its angle is greater than or equal to 180° and less than 190° or greater than or equal to 0° and less than 10°.
  • the right permanent magnet 117 moves in an outward direction perpendicular to the paper, and the moving direction is approximately parallel to the longitudinal axis direction of the driving coil core 115, and the angle is greater than 170° and less than or equal to 180° or greater than ⁇ 10° and less than or equal to 0°. .
  • the permanent magnets 116, 117 are moved by the reaction force from the drive coil 114, and the left and right permanent magnets 116, 117
  • the direction of motion is approximately parallel to the longitudinal axis direction of the drive coil core 115, that is, the included angle is greater than 170° and less than 190° or greater than ⁇ 10° and less than 10°.
  • a permanent magnet distribution different from this example can also be used.
  • the first variant transducer is provided with four permanent magnets 216, 217, 218, 219 that are secured to respective permanent magnet brackets 227, 228. , 229, 230.
  • the permanent magnet brackets 227, 228, 229, 230 are made of a highly magnetically permeable material such as industrial pure iron or silicon steel sheets or the like.
  • the first modified transducer includes: a first modified transducer permanent magnet 216, 217, 218, 219; a first modified transducer upper and lower left permanent magnet bracket 227, 228, a first modified transducer Lower right permanent magnet bracket 229, 230; first modified transducer left and right transmission arms 225, 226; first modified transducer left and right transducer elastic members 222, 223; The modified transducer elastic member fixing member 224; the first modified transducer driving shaft 211, these parts are fixed together.
  • the polarity of the magnetic pole of the upper left permanent magnet 216 of the first modified transducer in the direction toward the driving coil 114 is S pole
  • the lower permanent magnet 217 of the lower side of the first modified transducer is oriented toward the driving coil 114.
  • the polarity of the magnetic pole is S pole
  • the polarity of the magnetic pole of the upper right permanent magnet 219 of the first modified transducer in the direction toward the driving coil 114 is N pole
  • the lower permanent magnet 218 of the lower side of the first modified transducer is facing the driving coil 114
  • the polarity of the magnetic pole in the direction is N pole.
  • the first variant transducer permanent magnets 216, 217, 218, 219 can be moved relative to the first transducer spring fastener 224.
  • the configuration of these permanent magnets can also In many other ways, for example, the polarities of the right permanent magnets 219 and 218 in the direction toward the drive coil 114 are S poles, and the polarities of the left permanent magnets 216 and 217 in the direction toward the drive coil 114 are N poles, etc. Wait.
  • the first modified transducer left side transmission arm 225, the first modified transducer upper left permanent magnet bracket 227, the first modified transducer lower left permanent magnet bracket 228, and the first modified transducer upper left side The portion of the magnet 216, the lower left permanent magnet 217 of the first modified transducer, and the portion below the left transducer elastic member 222 is referred to as the lower left portion of the first modified transducer.
  • the portion of the magnet 219, the first modified transducer lower right permanent magnet 218 that is fixed and below the right transducer elastic member 223 is referred to as the right lower portion of the first modified transducer.
  • gaps 234, 235 in the lower left portion of the first modified transducer and the lower portion of the right side of the first modified transducer. These gaps cause at least one left permanent magnet (eg, permanent magnet 217) and at least one opposite polarity permanent magnet (eg, permanent magnet 218) to be independent of one another. It can also be understood that there are four movable permanent magnets distributed on both sides of the longitudinal axis of the drive shaft, the four movable permanent magnets being in the direction of the drive coil 114, and at least one left permanent magnet (for example, the permanent magnet 217). The polarity of the magnetic poles is opposite to the polarity of the magnetic poles of a right permanent magnet (for example, permanent magnet 218).
  • At least one left permanent magnet (eg, permanent magnet 217) and one opposite polarity permanent magnet (eg, permanent magnet 218) are independent of each other, and it is also understood that at least one left permanent magnet (eg, permanent magnet 217) may be relatively
  • the right permanent magnet (eg, permanent magnet 218) of opposite polarity moves.
  • FIG. 11A is a schematic diagram showing the combination of the first modified transducer and the modified driving coil; and FIG. 11B is an explanatory diagram of the current direction of the secondary winding of the driving coil and the direction of the supporting force of the permanent magnet shown in FIG. 11A.
  • the placement of the permanent magnets shown in Figures 1-7 is different.
  • the first modified transducer permanent magnet holders 227, 228, 229, 230 are highly magnetically conductive, The material is made so that the magnetic resistance of the first modified transducer permanent magnet holder is small, and most of the magnetic flux of the permanent magnet circulates in the permanent magnet holder.
  • the upper left permanent magnet bracket 227 of the first modified transducer forms an N magnetic pole on a plane facing the gap 234, and the upper modified permanent magnet bracket 229 of the first modified transducer forms a S on a plane facing the gap 234.
  • a magnetic pole such that the N-magnetic pole of the upper left permanent magnet bracket 227 of the first modified transducer facing the gap 234 and the S magnetic pole of the upper modified permanent magnet bracket 229 of the first modified transducer facing the gap 234 generate a magnetic field force. Attraction, this magnetic field force is characterized by maintaining the shortest length of magnetic lines of force in the gap 234.
  • the magnetic field forces F6, F8 and F5, F7 shown in FIGS. 11A and 11B are not equal in size, thereby destroying the state in which the cleaning device transducer is balanced, and the unbalanced force is The transducer will produce a translational trend in addition to the rotational motion, thereby losing energy and generating noise, and the gaps 234, 235 in this example can effectively correct the imbalance force. Assuming F8 > F7, F6 > F5, the inward force received by the right side of the cleaning appliance transducer is greater than the outward force received by the left side of the cleaning appliance transducer.
  • the first modified upper upper permanent magnet bracket 229 moves inward relative to the first modified upper upper permanent magnet bracket 227, so that the magnetic flux length in the gap 234 is lengthened due to the upper portion of the first modified transducer
  • the magnetic field force present in the gap 234 generated by the right permanent magnet bracket 229 and the upper left permanent magnet bracket 227 of the first modified transducer tends to maintain the magnetic field line to be the shortest, so the magnetic field force will resist the inward imbalance force.
  • the relative positions of the upper right permanent magnet bracket 229 of the transducer and the upper left permanent magnet bracket 227 of the first modified transducer are unchanged, so that the movement of the cleaning implement is smoother.
  • the magnitude of the magnetic field force in the gap 234 determines its response to the unbalanced force. According to the electromagnetic theory, the effective volume of the magnetic field in the gap 234 affects the magnitude of the magnetic field force. It can also be said that the length of the gap 234 affects the magnitude of the magnetic field force. . At the same time, the magnetic field strength of the permanent magnet also affects the magnitude of the magnetic field force.
  • the length of the gap 234 is preferably from 0.1 mm to 2 mm, and more preferably, the gap is from 0.2 mm to 1 mm.
  • the gap 235 has the same function, the original The same.
  • the upper gap 131 between the lower left portion of the transducer 130 and the lower portion of the right side of the transducer and the lower portion of the left side of the transducer 130 and the replacement The lower gap 129 between the lower right portions of the lower side has the same function as the gap 234 and the gap 235, and the upper gap 332 between the left lower portion of the second modified transducer and the lower right portion of the transducer.
  • the lower gap 333 between the lower left portion of the second modified transducer and the lower right portion of the transducer has the same function as the gap 234 and the gap 235 and will not be described in detail herein.
  • the first modified transducer modified drive coil 214 four movable permanent magnets 216, 217 are distributed on both sides of the longitudinal axis of the drive shaft. 218 and 219, and at least one left permanent magnet (e.g., permanent magnet 217) and one right permanent magnet (e.g., permanent magnet 218) having opposite pole polarities are independent of each other.
  • the two movable and mutually independent permanent magnets 217, 218 are opposite in polarity in the direction toward the modified drive coil 214; the two movable and mutually independent permanent magnets 217, 218 are subjected to a reaction force from the modified drive coil 214 While moving, the direction of movement of the left and right permanent magnets 217, 218 and the direction of the longitudinal axis of the modified drive coil core 215 (i.e., pointing in the direction perpendicular or perpendicular to the paper as shown in Fig. 11A) are approximated. Parallel, that is, its included angle is greater than 170° and less than 190° or greater than -10° and less than 10°.
  • the positional distribution of the transducer permanent magnets can be varied, for example, the position and number of the permanent magnets in the transducer 130 and the first variant transducer can be arbitrarily combined, and these solutions are not beyond the scope of the invention.
  • the transducer elastic members 122, 123 preferably comprise a rectangular elastic member or a sheet-shaped elastic member.
  • the left and right transducer elastic members 122, 123 are rectangular parallelepiped metal elastic pieces, and the left and right transducer elastic members 122.
  • the two ends of the 123 are respectively fixed to the transducer elastic member fixing member 124 and the left and right transmission arms 125 and 126 of the transducer, and the left transducer elastic member 122 receives the motion and energy from the left permanent magnet 116.
  • the right transducer elastic member 123 receives motion and energy from the right permanent magnet 117.
  • the transducer elastic member fixing member 124 is fixed at In the handle 1, the transducer left and right transmission arms 125, 126 are movable relative to the transducer elastic member fixing member 124 in accordance with the flexure of the elastic member.
  • the left and right transmission arms 125, 126 of the transducer are fixed above the transducer elastic members 122, 123 and fixed to the drive shaft 111, and the cleaning member 3 is fixed on the cleaning member carrier 2, and the cleaning assembly is detachably It is coupled to the drive shaft 111.
  • One skilled in the art can design a reasonable drive shaft 111 and cleaning assembly structure such that the drive shaft 111 effectively drives the cleaning assembly.
  • the transducer elastic members 122, 123 move with the movement of the permanent magnets 116, 117, and the transducer elastic member 122 123 continuously absorbs energy and releases energy.
  • the response frequency of the transducer elastic members 122, 123 is close to the current frequency of the driving coil 114, the energy conversion efficiency of the transducer is significantly improved, and the entire electric toothbrush is in a high efficiency state.
  • the transducer left actuator arm 125 As the movement of the left permanent magnet 116 is constrained by the left transducer elastic 122, when the left permanent magnet 116 is subjected to a reaction force approximately parallel to the longitudinal axis of the drive coil core 115, the transducer left actuator arm 125 And the left permanent magnet 116 is bent about the boundary line between the transducer elastic member fixing member 124 and the left transducer elastic member 122, and likewise, the transducer right side transmission arm 126 and the right side permanent magnet 117 A bending motion is made around the boundary line between the transducer elastic member fixing member 124 and the right transducer elastic member 123.
  • the longitudinal axis of the drive shaft 111 is approximately parallel with respect to the boundary line between the transducer elastic members 122, 123 and the transducer elastic member fixture 124, and more preferably, the included angle is greater than or equal to 0° and less than 15°, and the drive shaft 111 is The shortest distances of the longitudinal axis to the left and right transducer elastic members 122, 123 are equal.
  • the magnitude of the reaction force received by the left permanent magnet 116 and the right permanent magnet 117 is approximately equal, preferably the amplitude difference is within about 10%, the direction is approximately opposite, the direction angle is within 10°, and the left side is transposed.
  • the flexural section coefficients and lengths of the elastic member 122 and the right transducer elastic member 123 are approximately equal, preferably within 10% of the amplitude difference, so the deflection of the left transducer elastic member 122 and the flexibility of the right transducer
  • the deflection amplitudes of the pieces 123 are approximately equal, the amplitude difference is within 10%, and the respective deflection directions are opposite.
  • the drive shaft 111 is subjected to an approximately alternating balance force, and the alternating balance force generates an alternating torque to form a high-speed reciprocating and efficient rotation of the drive shaft 111.
  • the first variant transducer and the first A similar effect can also be obtained with the two-variant transducer.
  • the force of the left and right transmission arms of the transducer acting on the drive shaft can be made.
  • the difference between the amplitudes of the forces acting on the drive shaft on the left and right side of the transducers 125, 126 is within 10%, the directions of the forces are opposite, and the pair of left and right transmission arms 125, 126
  • the magnitude of the torque of the longitudinal axis of the drive shaft is approximately the same, and the amplitude difference between the torques of the left and right side of the transducers 125, 126 relative to the longitudinal axis of the drive shaft is preferably within 10%, and the direction of the torque is the same, thereby realizing the drive shaft.
  • the cleaning member carrier 2 and the cleaning member 3 are driven to rotate smoothly and at high speed.
  • Figure 13 shows a second variant transducer which differs from the transducer shown in Figure 7 and the first variant transducer shown in Figure 9 in the embodiment shown in Figures 7 and 9.
  • a single resilient fixture 124 or 224 is provided, compared to the distance of the transducer left actuator arm 125 or 225, the transducer right arm 126 or 226 from the axis of the drive shaft 111 or 211, a single transducer
  • the elastic member fixing member 124 is closer to the axis of the driving shaft 111; and in the example of Fig. 13, two elastic fixing members are provided, which are the left side transducer elastic fixing member 324 and the right side transducer elastic fixing member 325, respectively.
  • the two elastic fixing members 324, 325 are further away from the axis of the driving shaft 311 than the distance between the transducer left side transmission arm 326 and the transducer right side transmission arm 327 from the axis of the drive shaft 311, respectively.
  • a common feature of these structures is that at least two transducer elastic members are distributed on both sides of the longitudinal axis of the driving shaft 111, 211 or 311, and are located at the driving shaft 111, The longitudinal axis of 211 or 311 is coupled to the permanent magnet of the side and one end of the transducer elastic.
  • the transducer elastic member transmission arms are relatively movable relative to the respective transducer elastic member fixing members, and at least a pair of transducer elastic member transmission arms are provided on both sides of the longitudinal axis of the drive shaft.
  • the angle of movement of the pair of transducer elastic member transmission arms is greater than 90° and less than 270 °.

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Abstract

一种用于个人清洁护理用具，其驱动器(110)包括换能器(130)、驱动线圈(114)、驱动线圈铁芯(115)、驱动器支架(112,113)。换能器包括驱动轴(111)、换能器弹性件固定件(124)、关于驱动轴纵向轴线布置在左右两侧的永磁体(116,117)、固联永磁体的永磁体支架(118,119)、换能器传动臂(125,126)及换能器弹性件(122,123)。所述永磁体(116,117)相互独立，一侧永磁体在朝向驱动线圈(114)方向的磁极极性为S或N极，另一侧永磁体在朝向驱动线圈(114)方向具有与所述一侧永磁体的磁极极性相反的极性，永磁体(116,117)内部磁力线方向和驱动线圈铁芯(115)纵向轴线方向的夹角大于45°且小于135°，永磁体(116,117)可相对于换能器弹性件固定件(124)移动。驱动线圈(114)通过频率为f0的交变电流时，永磁体(116,117)的运动方向和驱动线圈铁芯(115)纵向轴线方向近似平行，二者的夹角大于170°且小于190°。该个人清洁护理用具具有结构简单紧凑、成本低廉、组装方便、转动平稳、噪音小、阻尼低且安全可靠。

Description

个人清洁护理用具 技术领域
本发明涉及一种用于个人清洁护理的用具，更具体地说，涉及如电动牙刷、电动剃须刀、电动洁面器、电动沐浴器之类的个人清洁护理用具。
背景技术
对于如电动牙刷、电动剃须刀、电动洁面器、电动沐浴器等个人清洁护理用具而言，重要的是，应具有可将往复运动转换成使清洁元件作预期旋转运动的个人清洁护理用具，这些个人清洁护理用具应该结构简单、组装方便、使用寿命长且安全可靠。
已知有许多用于驱动清洁元件的驱动结构。例如马达、磁系统及电磁系统。有些驱动结构采用轴承(例如滚珠轴承)来支撑驱动器，这种结构既昂贵又复杂，而且还存在噪音及马达的阻尼。
CN 100591301C公开了一种将侧向运动转换为器具工作件的旋转运动的装置，其中驱动组件包括电磁铁，可产生侧向力，在操作时与两个永磁铁结合，永磁铁固定到位于运动转换组件后端的可移动的端部件，以便通过侧向稍微弧线的平移方式移动端部件。两个永磁铁相对固定地安装于所述端部件上。运动转换组件通过设置板簧将驱动组件的驱动动作转换成驱动轴的扭转或旋转动作，驱动轴再转动刷头臂和刷头，使之围绕驱动轴的纵向轴线旋转。CN101297775B公开了一种共振驱动系统弹性件的调整方法，其中弹簧件不弯曲，通过充分改变弹性件的刚度而改变其谐振频率，使其非常接近器具的驱动频率。
发明内容
本发明要解决的技术问题是，提供一种用于个人清洁护理用具，该清洁用具结构简单紧凑、成本低廉、组装方便、转动平稳、噪音 小、阻尼低且安全可靠。
为解决上述技术问题，本发明所提供的用于个人清洁护理用具包括：手柄，其包括手柄外壳，手柄外壳内部装有用以向个人清洁护理用具的各个部分提供电力的电源部分、用以控制个人清洁护理用具的各种工作模式以及个人清洁护理用具的开启或关闭的控制部分、用以启动或关闭所述清洁护理用具运转的触发部分和将输入的电能转换为机械能输出的驱动器，驱动器包括换能器、驱动线圈、设置在驱动线圈中的驱动线圈铁芯、用于支承驱动器的驱动器左侧支架和驱动器右侧支架；清洁组件，其包括清洁元件载体和分布在清洁元件载体上的清洁元件，清洁组件与驱动轴可拆卸地联接在一起；其中，换能器包括插入清洁组件的驱动轴、至少一个紧固于驱动器左、右侧支架的换能器弹性件固定件、至少两个相对于驱动轴纵向轴线布置在左右两侧的永磁体、用于固联所述永磁体的相应的永磁体支架、与永磁体支架固联并与驱动轴固联的左、右侧换能器传动臂以及至少两个设置在驱动轴纵向轴线左右两侧的左侧换能器弹性件和右侧换能器弹性件，左、右侧换能器弹性件的一端分别与换能器弹性件固定件固联，左、右侧换能器弹性件的另一端分别与相应的换能器传动臂固联；其中，永磁体相互独立，左侧永磁体在朝向驱动线圈方向的磁极极性为S极或N极，右侧永磁体在朝向驱动线圈方向的磁极极性为与左侧永磁体的磁极极性相反的极性，所述左、右侧永磁体被设置成使得它们的内部磁力线方向和驱动线圈铁芯纵向轴线方向的夹角分别大于45°且小于135°，左、右侧永磁体可相对于换能器弹性件固定件移动；当驱动线圈通过频率为f0的交变电流时，左、右侧永磁体的运动方向和驱动线圈铁芯纵向轴线方向近似平行，即二者的夹角为大于170°且小于190°或大于-10°且小于10°。
上述技术方案具有如下两个方面有益的技术效果。第一方面，左、右侧永磁体设置成它们的内部磁力线方向和驱动线圈铁芯纵向轴线方向的夹角为大于45°且小于135°时，左、右侧永磁体之间 形成的穿过驱动线圈的磁力线方向和通电驱动线圈形成的线圈内部磁力线方向为空间大于45°且小于135°相交，即驱动线圈产生的磁场轴线和永磁磁场轴线之间产生的相互干扰较小。也就是说，上述两个磁场的相互干扰较小，当驱动线圈中的电流大小和方向发生变化时，驱动线圈产生的磁场会相应的发生变化，但是，由于驱动线圈的磁场轴线和永磁磁场轴线干扰较小，驱动线圈产生的磁场变化对永磁磁场的影响非常有限。当驱动线圈通过按照余弦变化的交变电流时，由于通电导体处于永磁磁场中，通电导体受到电磁力的作用，电磁力公式为F＝NBILcosωt，式中B为永磁磁场在导体处的磁场密度，Icosωt为导体中流过的电流，L为导体在永磁磁场中的有效长度，N为导体的总根数，ω为电流变化的电角速度，t为时间，由电磁力公式知，如果N、B、L不变，则F只和Icosωt有关。上述的两个相互干扰较小的磁场可保证B变化较小，清洁用具内部结构可保证N、L不变。由于cosωt曲线为光滑曲线，即电磁力为一个连续渐变而无突变的物理量，从而可保证清洁用具在电磁力F的驱动下实现平稳无冲击的运动，即运动的加速度无突变。第二方面，本发明创造性引入至少两个换能器弹性件，分别为左侧换能器弹性件和右侧换能器弹性件，利用弹性材料的弯曲应变构成具有固有振动频率f固的换能器，当换能器的固有频率f固非常接近驱动频率f0时，手柄外壳中的驱动线圈产生并作用在换能器上的电磁力使换能器处于谐振状态，当换能器的固有频率f固等于驱动频率f0时，手柄外壳中的驱动线圈产生并作用在换能器上的电磁力使换能器处于共振状态。众所周知，谐振状态或共振状态下的能量传递效率非常高。在现有的采用轴承(例如滚珠轴承)的驱动结构中，设置轴承之类的约束件是为了防止清洁器件除旋转运动外还存在其它运动，但是这种约束将带来噪音和能量损耗，也增加了成本。本发明中，由于合理地配置弹性件和永磁体，可实现换能器的平稳转动，从而免去了一些为了实现清洁用具的旋转转动而必须设置的约束件(如轴承等)。由于合理配置永磁体使得换能器上受到的电磁合力 近似为零，并巧妙利用作用在换能器上的转矩，可以省去所述约束结构，因此使清洁用具结构更紧凑，转动更平稳且噪音更小。此外，与只设有一个换能器弹性件的结构相比，本发明的清洁用具结构的噪音更低且效能更高。综上上述两个方面有益技术效果，本发明实现了结构简单紧凑、成本低廉、组装方便、转动平稳、噪音小、阻尼低且安全可靠的目标。
优选地，左、右侧永磁体被设置成使得它们的内部磁力线方向和驱动线圈铁芯纵向轴线方向的夹角为90°。此时，本发明中的左、右侧永磁体之间形成的穿过驱动线圈的磁力线方向和通电驱动线圈形成的线圈内部磁力线方向为空间90°相交，即驱动线圈产生的磁场轴线和永磁磁场轴线正交。可以将上述两个磁场的正交理解为两个磁场相互不干扰，当驱动线圈中的电流大小和方向发生变化时，驱动线圈产生的磁场会相应的发生变化，但是，由于驱动线圈的磁场轴线和永磁磁场轴线正交，驱动线圈产生的磁场变化不影响永磁磁场。当驱动线圈通过按照余弦变化的交变电流时，由于通电导体处于永磁磁场中，通电导体受到电磁力的作用，电磁力公式为F＝NBILcosωt，式中B为永磁磁场在导体处的磁场密度，Icosωt为导体中流过的电流，L为导体在永磁磁场中的有效长度，N为导体的总根数，ω为电流变化的电角速度，t为时间，由电磁力公式知，如果N、B、L不变，则F只和Icosωt有关。本例中上述的正交磁场可保证B不变，清洁用具内部结构也可保证N、L不变。由于cosωt曲线为光滑曲线，即电磁力为一个连续渐变而无突变的物理量，从而可保证清洁用具在电磁力F的驱动下实现平稳无冲击的运动，即运动的加速度无突变。
优选地，本发明的个人清洁护理用具的换能器左侧传动臂、关于驱动轴纵向轴线与该传动臂同侧的左侧永磁体和相应的永磁体支架固联且处于关于驱动轴纵向轴线与所述传动臂同侧的左侧换能器弹性件之下的部分限定为换能器左侧下部部分，换能器右侧传动臂、右侧永磁体和相应的永磁体支架固联且处于右侧换能器弹性件之下 部分限定为换能器右侧下部部分，换能器左侧下部部分和换能器右侧下部部分存在至少一个间隙(本发明中为两个间隙)，该间隙中存在足以补偿由于不平衡力引起换能器平动的磁场力，且允许至少一个永磁体相对于极性相反的另一个永磁体运动。此技术方案充分考虑到了以往的个人清洁用具由于制造中的误差或其它干扰因素，造成的各组磁场力的大小不相等，从而破坏了个人清洁护理用具换能器受力平衡的状态，不平衡受力的换能器将产生除旋转运动之外的平动趋势，从而损失能量并产生噪音的情形。因此，此技术方案可以采用所述两个间隙，通过改变所述间隙的距离，有效地修正上述的不平衡力，进而使得个人清洁护理用具的运动更加平稳。
优选地，换能器左侧下部部分和换能器右侧下部部分间隙的长度为0.1mm至2mm。更优选地，该间隙的长度为0.2mm至1mm。由此能够更为有效地发挥所述间隙的用于调整不平衡力的功能，更好地修正上述的不平衡力，进而使得个人清洁护理用具的运动更加平稳。
优选地，本发明中永磁体可以为长方体形钕铁硼永磁体，优选其长约为5mm至30mm，宽约为2mm至20mm，高约为1mm至10mm。此种永磁体具有加工便捷，规格化、标准化程度高等优点，易于工业化生产，同时也可以根据不同尺寸的个人清洁护理用具采用不同尺寸的此种永磁体，以符合不同类型的个人清洁护理用具的需要。
优选地，换能器还可以设有四个永磁体，左侧永磁体和右侧永磁体设置为使它们受到的反作用力大小近似相等，幅值差约在10％以内，方向近似相反，方向夹角在10°以内。由此，驱动轴受到近似交变的平衡力的作用，且该交变平衡力产生交变转矩，从而形成驱动轴高速往复、高效的转动。
优选地，换能器弹性件包括矩形弹性件或片型弹性件。所述的矩形弹性件或片型弹性件都具有通用性强，易于生产加工，价格低廉，易于获得和替换的优点，并且拥有良好的使用寿命，可以可靠 地不断吸收能量和释放能量，保证个人清洁护理用具的正常平稳运作。
优选地，换能器可以设有两个换能器弹性件，它们对称地分布在驱动轴纵向轴线的左右两侧，两个换能器弹性件的夹角为180°；左侧换能器弹性件和右侧换能器弹性件设置为它们的抗弯截面系数和长度近似相等，幅值差在10％以内，致使左侧换能器弹性件的挠度和右侧换能器弹性件的挠度幅值近似相等，幅值差在10％以内，各自挠度方向相反。由此，驱动轴受到近似交变的平衡力的作用，且该交变平衡力产生交变转矩，从而形成驱动轴高速往复、高效的转动。
较优地，换能器弹性件的个数可以是多个，特别地，换能器也可设有三个换能器弹性件，其中两个换能器弹性件之间的夹角为2α，0°＜α＜90°，该两个换能器弹性件中任一个与第三个换能器弹性件之间的夹角为δ，δ＝(360°-2α)/2。由此优化的技术方案可以使换能器左、右侧传动臂分别作用于驱动轴上的力的幅值差在10％以内，力的方向相反，且左、右侧传动臂对驱动轴纵向轴线的力矩大小近似相同，力矩方向也相同，从而实现驱动轴带动清洁元件载体和清洁元件平稳、高速地往复运动。
所述的个人清洁护理用具，包括电动牙刷、电动剃须刀、电动洁面器、电动沐浴器，还可以是其他具有类似功能的用具。
附图说明
图1为本发明的个人清洁护理用具的正视图；
图2为图1所示个人清洁护理用具的侧向局部剖视图；
图3示出了图2所示驱动器的正面视图；
图4为图3所示驱动器的分解图；
图5为换能器的立体图；
图6为图4所示驱动线圈的立体图；
图7为换能器和驱动线圈的组合状态下的示意图；
图8A为图7所示驱动线圈次级绕组电流方向和永磁体受力方向的原理说明图；
图8B为驱动线圈和永磁体磁场力的原理说明图；
图9为第一变型换能器的立体图；
图10为从另一角度看到的图9所示换能器的立体图；
图11A为图9所示换能器和变型驱动线圈的组合状态下的示意图；
图11B为图11A所示驱动线圈次级绕组电流方向和永磁体受力方向的原理说明图；
图12为图11A所示的变型驱动线圈的立体图；
图13为第二变型换能器和变型驱动线圈的组合状态下的示意图；
图14为变型换能器弹性件组合示意图。
主要附图标记说明：
1 为手柄
2 为清洁元件载体
3 为清洁元件
103 为密封件
104 为开关按钮
105 为手柄外壳
106 为开关
107 为控制电路线路板
108 为充电线圈
109 为充电电池
110 为驱动器
111 为驱动轴
112 为驱动器左侧支架
113 为驱动器右侧支架
114 为驱动线圈
115 为驱动线圈铁芯
116 为左侧永磁体
117 为右侧永磁体
118 为左侧永磁体支架
119 为右侧永磁体支架
120 为驱动线圈左侧初级绕组
121 为驱动线圈右侧初级绕组
122 为左侧换能器弹性件
123 为右侧换能器弹性件
124 为换能器弹性件固定件
125 为换能器左侧传动臂
126 为换能器右侧传动臂
127 为紧固螺丝
128 为驱动线圈的次级绕组
129 为换能器左侧下部部分和该换能器右侧下部部分之间的下间隙
130 为换能器
131 为换能器左侧下部部分和该换能器右侧下部部分之间的上间隙
211 为第一变型换能器驱动轴
214 为第一变型换能器变型驱动线圈
215 为第一变型换能器变型驱动线圈铁芯
216 为第一变型换能器上部左侧永磁体
217 为第一变型换能器下部左侧永磁体
218 为第一变型换能器下部右侧永磁体
219 为第一变型换能器上部右侧永磁体
222 为第一变型换能器左侧换能器弹性件
223 为第一变型换能器右侧换能器弹性件
224 为第一变型换能器的换能器弹性件固定件
225 为第一变型换能器左侧传动臂
226 为第一变型换能器右侧传动臂
227 为第一变型换能器上部左侧永磁体支架
228 为第一变型换能器下部左侧永磁体支架
229 为第一变型换能器上部右侧永磁体支架
230 为第一变型换能器下部右侧永磁体支架
231 为第一变型换能器变型驱动线圈次级绕组
232 为第一变型换能器变型驱动线圈左侧初级绕组
233 为第一变型换能器变型驱动线圈右侧初级绕组
234 为第一变型换能器左侧下部部分和该换能器右侧下部部分之间的上间隙
235 为第一变型换能器左侧下部部分和该换能器右侧下部部分之间的下间隙
311 为第二变型换能器驱动轴
314 为第二变型换能器变型驱动线圈
315 为第二变型换能器变型驱动线圈铁芯
316 为第二变型换能器上部左侧永磁体
317 为第二变型换能器下部左侧永磁体
318 为第二变型换能器下部右侧永磁体
319 为第二变型换能器上部右侧永磁体
322 为第二变型换能器左侧换能器弹性件
323 为第二变型换能器右侧换能器弹性件
324 为第二变型换能器左侧换能器弹性件固定件
325 为第二变型换能器右侧换能器弹性件固定件
326 为第二变型换能器左侧传动臂
327 为第二变型换能器右侧传动臂
328 为第二变型换能器上部左侧永磁体支架
329 为第二变型换能器下部左侧永磁体支架
330 为第二变型换能器上部右侧永磁体支架
331 为第二变型换能器下部右侧永磁体支架
332 为第二变型换能器左侧下部部分和该换能器右侧下部部分之间的上间隙
333 为第二变型换能器左侧下部部分和该换能器右侧下部部分之间的下间隙
334 为第二变型换能器左侧传动臂和该换能器右侧传动臂之间的间隙
401 为第一换能器弹性件
402 为第二换能器弹性件
403 为第三换能器弹性件
具体实施方式
下文以电动牙刷作为个人清洁护理用具的典型例子，并结合附图更详细地描述本发明的示例性实施例。虽然下面仅以电动牙刷为例进行解释说明，但本发明不限于此。本发明也可适用于电动剃须刀、电动洁面器、电动沐浴器等用于个人清洁护理的用具。
在全部附图中，类似的附图标记表示相似的部件。
为了清楚起见，在本说明书中采用了表述空间相对位置的词语如“上”、“下”、“上部”、“下部”、“左”、“右”、“横向”、“正向”、“反向”等来简单描述如图所示的一个元件或特征与另一元件(一或多个)或特征(一或多个)的相互关系，其中，驱动线圈纵向轴线方向是指平行于驱动线圈流过电流时铁芯内部产生的磁力线方向；“上”、“下”、“上部”、“下部”是相对于驱动轴纵向轴线而言的，面向相应视图沿平行于驱动轴纵向轴线的向上方向定义为“上”、“上部”，沿平行于驱动轴纵向轴线的向下方向定义为“下”、“下部”；“左”和“右”是相对于驱动轴纵向轴线而言的，面向相应视图沿垂直于驱动轴纵向轴线的方向在驱动轴纵向轴线的左侧定义为“左”，其右侧定义为“右”；“横 向”是指垂直于驱动轴纵向轴线的方向；“向外”是指垂直于纸面迎向操作者的方向；“向内”是指垂直于纸面远离操作者的方向。
此外，本申请中使用的词汇“和/或”包括所列出的一或多个相关联的词汇中的任一个和所有组合。
尽管本说明书中使用了词语“第一”等来描述多个元件或构成部分，这些元件或构成部分不应受这些词语的限制。这些词语仅用于区分一个元件或构成部分和另一元件或构成部分，而不包含“顺序”。因此，将下面讨论的那些元件或构成部分的序数词相互变换也没有超出本发明的构思和范围。
作为一个示例，如图1和图2所示，如电动牙刷之类的用于个人清洁护理的用具包括手柄1和可拆卸地(例如以卡扣联接方式)安装在手柄1上的清洁组件。手柄1包括手柄外壳105。清洁组件包括清洁元件载体2、分布在清洁元件载体2上的清洁元件3，清洁元件3可以是如刷毛之类的物品。清洁组件(如刷头)通过清洁组件与驱动轴111例如以卡扣联接方式可拆卸地联接在一起，卡扣联接可以使驱动手柄1和清洁组件可靠地联接在一起，也可以方便地分离驱动手柄1和清洁组件。
手柄外壳105的内部装有电源部分、控制部分、触发部分和驱动器。通常电源部分包括充电电池109和充电电路，用以向用具的各个部分提供电力；控制部分包括控制电路线路板107，用以控制电动牙刷的各种工作模式以及电动牙刷的开启或关闭等；触发部分包括开关106，用以启动和关闭电动牙刷的运转；驱动器的功能是将输入的电能转换为输出的机械能。
手柄1还包括装于手柄外壳105中的充电线圈108、充电电池109、控制电路线路板107、装于控制电路线路板107上的开关106、附联在手柄外壳105上的开关按钮104、固定在手柄外壳105内的驱动器110、以及密封件103，控制电路线路板107与开关106和驱动器110电通讯。开关按钮104与开关106联接，通过操作开关按钮104作动开关106。密封件103的一端与清洁元件载体2联接，密封 件103的另一端与驱动器110联接，用作防水密封。
如图3和图4所示，驱动器110包括换能器130、驱动线圈114、沿垂直于驱动轴纵向轴线方向设置在驱动线圈114中空部分中具有高导磁特性的驱动线圈铁芯115、用于支承驱动器110的驱动器左侧支架112和驱动器右侧支架113及紧固螺丝127，驱动器左侧、右侧支架112、113和换能器130的换能器弹性件固定件124通过紧固螺丝127紧固在一起。
换能器130包括驱动轴111、换能器弹性件固定件124、分别位于驱动轴纵向轴线左右两侧的左侧换能器弹性件122和右侧换能器弹性件123、换能器左侧和右侧传动臂125和126、左侧和右侧永磁体116和117、以及左侧和右侧永磁体支架118和119，所述左右侧换能器弹性件122和123之间的夹角可以为180°。左、右侧换能器弹性件122、123可以和换能器弹性件固定件124通过注塑联接在一起，也可以用一整块弹性件与换能器弹性件固定件124通过注塑成型。在整体注塑成型的方案中，虽然采用整块弹性件制作左、右换能器弹性件122、123，但由于左、右换能器弹性件122、123的受力方向不同，所以，仍可认为是由二个弹性件构成。
当然，换能器弹性件还可有其他设置方式，这些方式也将落入本发明的范围。
清洁组件可拆卸地插入驱动轴111，使得换能器130与清洁组件联接在一起。左侧换能器弹性件122和右侧换能器弹性件123的一端分别与换能器弹性件固定件124固联在一起，左侧换能器弹性件122和右侧换能器弹性件123的另一端分别与换能器左侧、右侧传动臂125、126固联在一起。换能器130的左侧和右侧永磁体116和117、左侧和右侧永磁体支架118和119与左侧和右侧换能器弹性件122、123、换能器左侧、右侧传动臂125、126、驱动轴111及换能器弹性件固定件124固联。换能器弹性件固定件124通过紧固螺丝127与驱动器左侧、右侧支架112、113固联并被固定到手柄1中。以上零件可以通过注塑成一体，也可以通过机械连接方式组装在一 起。
换能器130的左侧和右侧永磁体116和117与左侧和右侧永磁体支架118和119围成中空区域，该中空区域用以容纳驱动线圈114和驱动线圈铁芯115。换能器左侧传动臂125、左侧永磁体116及左侧永磁体支架118固联且处于左侧换能器弹性件122之下的部分称为换能器左侧下部部分。换能器右侧传动臂126、右侧永磁体117及右侧永磁体支架119固联且处于右侧换能器弹性件123之下部分称为换能器右侧下部部分。换能器左侧下部部分和换能器右侧下部部分存在至少一个间隙，一般为两个间隙129、131。该间隙可以允许至少一个左侧永磁体116相对于极性相反的一个右侧永磁体117运动。所述间隙使得左侧、右侧永磁体116、117相互独立。换能器130沿靠近清洁组件方向设置有驱动轴111，驱动轴111和清洁组件可拆卸地装配在一起，通过合理设计驱动轴111的形状，可使驱动轴111有效地将运动和能量传递给清洁组件。
下面结合换能器130进行运动分析。参见图1至7，使用者触发电动牙刷的开关按钮104从而触动开关106时，手柄1中的控制系统启动驱动线圈114，驱动线圈114的左侧初级绕组120和右侧初级绕组121交替地通过频率为f0/2的交变电流。换能器130的左侧永磁体116和右侧永磁体117形成的磁场和通电的驱动线圈114相互作用产生电磁力。通过相对于驱动线圈114合理地配置永磁体116、117，换能器130上受到的电磁力基本平衡，且产生转矩M。由于交变电流流过驱动线圈114，换能器130上的转矩M的方向也是交变的。假设在初始状态下，换能器的转矩M的方向为顺时针方向。由于换能器弹性件固定件124被固定在驱动器左侧、右侧支架112、113上，换能器左侧传动臂125驱动左侧换能器弹性件122沿顺时针方向弯曲，左侧换能器弹性件122发生弯曲应变，储存能量，左侧换能器弹性件122绕换能器弹性件固定件124沿顺时针方向弯曲应变。同时，换能器右侧传动臂126驱动右侧换能器弹性件123沿顺时针方向弯曲，右侧换能器弹性件123发生弯曲应变，储存能 量，右侧换能器弹性件123也绕换能器弹性件固定件124沿顺时针方向弯曲应变。因此，换能器130响应手柄1的外壳105中驱动线圈114的驱动作往复转动。清洁元件3通过清洁元件载体2联接到换能器130上，换能器130驱动清洁元件3往复转动。
本实施例中创造性引入至少两个换能器弹性件，分别为左侧换能器弹性件122和右侧换能器弹性件123，利用弹性材料的弯曲应变构成具有固有振动频率f固的换能器130，当换能器130的固有频率f固非常接近驱动频率f0时，手柄外壳105中的驱动线圈114产生并作用在换能器130上的电磁力使换能器130处于谐振状态，当换能器130的固有频率f固等于驱动频率f0时，手柄外壳105中的驱动线圈114产生并作用在换能器130上的电磁力使换能器130处于共振状态。众所周知，谐振状态或共振状态下的能量传递效率非常高。在现有的采用轴承(例如滚珠轴承)的驱动结构中，设置轴承之类的约束件是为了防止清洁器件除旋转运动外还存在其它运动，但是这种约束将带来噪音和能量损耗，也增加了成本。本发明中，由于合理地配置弹性件和永磁体，可实现换能器130的平稳转动，从而免去了一些为了实现清洁用具的旋转转动而必须设置的约束件(如轴承等)。由于合理配置永磁体使得换能器130上受到的电磁合力近似为零，并巧妙利用作用在换能器130上的转矩，可以省去所述约束结构，因此使清洁用具结构更紧凑，转动更平稳且噪音更小。此外，与只设有一个换能器弹性件的结构相比，本发明的清洁用具结构的噪音更低且效能更高。
当驱动线圈114的左侧初级绕组120通过电流而且驱动线圈114的右侧初级绕组121未通过电流时，驱动线圈114的次级绕组128产生感应电动势，驱动线圈114的次级绕组128与外部电路形成闭合回路，所以，驱动线圈114的次级绕组128同样产生感应电流11。当驱动线圈114的左侧初级绕组120未通过电流而驱动线圈114的右侧初级绕组121通过电流时，在驱动线圈114的次级绕组128产生感应电流12。通过合理设置电路，可以使11和12的频率相同， 方向相反，大小近似相等。
当然，所属领域技术人员还可以设计出其它方案，如省去驱动线圈114的初级绕组120、121，直接使电路产生的频率为f0的交变电流通过驱动线圈114的次级绕组128，或只用一个驱动线圈初级绕组，在驱动线圈初级绕组内流过频率为f0的交变电流，以在驱动线圈次级绕组128中产生感应电流等，这些方案均未超出本发明范围。
又如图5、6、7、8A所示，本例中，沿驱动轴纵向轴线两侧分布有两个可移动且相互独立的左侧、右侧永磁体116、117。此两个永磁体116、117沿朝向驱动线圈114方向的磁极极性相反。可将左侧、右侧永磁体116、117设置成它们的内部磁力线方向和驱动线圈铁芯115纵向轴线方向的夹角大于45°且小于135°，优选该夹角为90°。如图7所示，驱动线圈铁芯115纵向轴线方向是沿垂直于纸面向内或向外方向，此时驱动线圈铁芯115纵向轴线方向和驱动轴纵向轴线相互垂直。
本发明中，左侧、右侧永磁体116、117设置成它们的内部磁力线方向和驱动线圈铁芯115纵向轴线方向的夹角为90°时，左、右侧永磁体116、117之间形成的穿过驱动线圈的磁力线方向和通电驱动线圈形成的线圈内部磁力线方向为空间90°相交，即驱动线圈114产生的磁场轴线和永磁磁场轴线正交。可以将上述两个磁场的正交理解为两个磁场相互不干扰，当驱动线圈114中的电流大小和方向发生变化时，驱动线圈114产生的磁场会相应的发生变化，但是，由于驱动线圈114的磁场轴线和永磁磁场轴线正交，驱动线圈114产生的磁场变化不影响永磁磁场。当驱动线圈114通过按照余弦变化的交变电流时，由于通电导体处于永磁磁场中，通电导体受到电磁力的作用，电磁力公式为F＝NBILcosωt，式中B为永磁磁场在导体处的磁场密度，Icosωt为导体中流过的电流，L为导体在永磁磁场中的有效长度，N为导体的总根数，ω为电流变化的电角速度，t为时间，由电磁力公式知，如果N、B、L不变，则F只和Icosωt有关。本例中上述的正交磁场可保证B不变，清洁用具内部结构也 可保证N、L不变。由于cosωt曲线为光滑曲线，即电磁力为一个连续渐变而无突变的物理量，从而可保证清洁用具在电磁力F的驱动下实现平稳无冲击的运动，即物体运动的加速度无突变。
为了更加清楚地分析上述正交磁场的优点，下面通过图8B具体分析永磁体磁场轴线和驱动线圈114的磁场轴线平行或重合时的情况。
如图8B所示，将永磁体分布在驱动线圈114A的上方，使永磁体内部磁力线方向和驱动线圈铁芯115A的纵向轴线(其指向如图8B所示的沿纸面向上或向下)方向平行，此时驱动线圈铁芯115A纵向轴线方向和驱动轴纵向轴线相互平行。于是，驱动线圈114A产生的磁场轴线和永磁体磁场的轴线平行，驱动线圈114A产生的磁场和永磁体磁场互相干扰，驱动线圈114A产生的磁场大小和方向随驱动线圈114A的电流的大小和方向变化而变化。两个磁场的相互干扰使永磁体和驱动线圈114A之间气隙的磁场随时间变化而呈畸形，从而气隙中的磁场密度B发生畸变，造成位于驱动轴纵向轴线两侧的磁场密度B不对称。由于磁场密度B的大小影响电磁力的大小，因此，相互干扰的永磁体磁场和驱动线圈114A的磁场会造成左右两侧永磁体上的受力不平衡，从而使得清洁用具的换能器除旋转运动外还产生平动，进而造成清洁用具的噪音和低效率。另外，驱动线圈铁芯115A的磁极和永磁体的磁极之间还存在磁极的磁场力，此磁场力可以为吸引力也可以为排斥力，依照电磁学理论可知，该磁场力与永磁体和驱动线圈铁芯115A的距离的平方成反比。如图8B所示，左侧永磁体116A在磁场力F4的作用下向左运动，永磁体和驱动线圈铁芯115A的距离变大，磁场力F4变小，右侧永磁体117A在磁场力F3的作用下向左运动，永磁体和驱动线圈铁芯115A的距离变小，磁场力F3变大。显然，F4和F3的变化会造成在平行于驱动线圈铁芯115A的纵向轴线方向上的分力，且此分力为交变量，从而造成了清洁用具换能器沿驱动线圈铁芯115A的纵向轴线方向的振动、噪音以及能量损耗。
除此之外，驱动线圈114A产生的交变磁场对永磁体116A、117A不断地进行增磁和去磁的磁化过程，如图8B所示，左边的永磁体116A处于去磁状态，右边的永磁体117A处于增磁状态。在永磁体116A、117A的增磁和去磁过程中，由于磁滞效应永磁体116A、117A会产生磁滞损耗，此种磁滞损耗使能量流失，从而使清洁用具的效率降低。而且，此增磁和去磁作用对永磁体116A、117A的材料和性能提出了更高要求，依电磁理论可知，去磁的磁场强度大于永磁体的矫顽力时，永磁体将被退磁而失去磁性，因此，在驱动线圈114A产生的磁场轴线和永磁体磁场轴线平行或重叠的应用中，永磁体的矫顽力要大于驱动线圈114A产生的磁场强度，从而约束了永磁体116A、117A和驱动线圈114A的选择。
与永磁体磁场轴线平行或重叠于驱动线圈114A的磁场轴线布置相比，在本发明的所述示例中，永磁体磁场轴线正交于驱动线圈114磁场轴线的布置可以克服上述缺点，从而可使清洁用具更平稳地、无冲击地运动，且拥有较高的效率，同时扩大了永磁体116、117和驱动线圈114的选择范围。
优选永磁体116、117可以采用长宽高分别为5～30mm、2mm～20mm、1mm～10mm的钕铁硼永磁体。
如图4、6和8A所示，假设驱动线圈次级绕组128中通过的电流为I1，电流方向如图8A所示。则左侧永磁体116受到垂直于纸面向外的反作用力，右侧永磁体117受到垂直于纸面向内的反作用力。当驱动线圈114未通电时，左侧换能器弹性件122沿换能器弹性件固定件124指向换能器左侧传动臂125方向的轴线与左侧永磁体116内部的磁力线方向平行。同样，右侧换能器弹性件123沿换能器弹性件固定件124指向换能器右侧传动臂126方向的轴线与右侧永磁体117内部的磁力线方向平行。本例中，左侧、右侧换能器弹性件122、123相互平行且处于同一平面中。
本发明中通过上述结构使左侧永磁体116和左侧换能器弹性件122组成一个振动系统，当左侧永磁体116受方向为垂直于纸面 向外的反作用力时，左侧永磁体116趋向垂直于纸面向外方向运动。左侧永磁体116受到左侧换能器弹性件122的约束。当左侧换能器弹性件122在接近换能器左侧传动臂125区域受到垂直于纸面向内或向外方向的力或分力、或沿纸面方向向上或向下的力矩的作用时，左侧换能器弹性件122产生围绕以左侧换能器弹性件122和换能器弹性件固定件124分界线为轴线的弯曲变形。在本例中，优选将左侧换能器弹性件122设置成使得与左侧换能器弹性件122的挠度对应的转角小于10°。因此，左侧永磁体116在受到垂直于纸面向外方向的反作用力时，左侧永磁体116沿垂直于纸面向外方向并符合左侧换能器弹性件122的挠曲运动规律而运动。也可以理解为，左侧永磁体116沿垂直于纸面向外方向运动，运动方向和驱动线圈铁芯115纵向轴线方向近似平行，也就是说，其夹角大于170°且小于等于180°或者为大于-10°且小于等于0°。
类似地，当右侧永磁体117受到垂直于纸面向内的反作用力时，右侧永磁体117趋向沿垂直于纸面向内的方向运动。右侧永磁体117受到右侧换能器弹性件123的约束。右侧换能器弹性件123在接近换能器右侧传动臂126区域受到垂直于纸面向内或向外方向的力或分力、或沿纸面方向向上或向下的力矩的作用时，右侧换能器弹性件123产生围绕以右侧换能器弹性件123和换能器弹性件固定件124分界线为轴线的弯曲变形。在本例中，优选将右侧换能器弹性件123设置成使得与右侧换能器弹性件123的挠度对应的转角小于10°。因此，右侧永磁体117在受到沿垂直于纸面向内方向的反作用力时，右侧永磁体117沿垂直于纸面向内方向且符合右侧换能器弹性件123的挠曲运动规律而运动。也可以理解成，右侧永磁体117沿垂直于纸面向内方向运动，运动方向和驱动线圈铁芯115纵向轴线方向(即，指向如图7所示的沿垂直于纸面向内或向外方向)近似平行，也就是说，其夹角大于等于180°且小于190°或者为大于等于0°且小于10°。
显然，当流过驱动线圈114中的电流与图8A所示方向相反时， 左侧、右侧永磁体116、117的运动方向反向，左侧永磁体116沿垂直于纸面向内方向运动，运动方向和驱动线圈铁芯115纵向轴线方向近似平行，其夹角大于等于180°且小于190°或者大于等于0°且小于10°。右侧永磁体117沿垂直于纸面向外方向运动，运动方向和驱动线圈铁芯115纵向轴线方向近似平行，其夹角大于170°且小于等于180°或者为大于-10°且小于等于0°。
综上所述，在驱动线圈114的次级绕组128通过频率为f0的交变电流时，永磁体116、117受到来自驱动线圈114的反作用力而运动，左侧、右侧永磁体116、117的运动方向和驱动线圈铁芯115纵向轴线方向近似平行，也就是说，其夹角为大于170°且小于190°或者大于-10°且小于10°。显然，还可以采用与本例不同的永磁体分布方式。
在另一实施例中，如图9、10、11A所示，第一变型换能器设有四个永磁体216、217、218、219，它们被固联在各自的永磁体支架227、228、229、230上。永磁体支架227、228、229、230由高导磁材料例如工业纯铁或硅钢片等制成。该第一变型换能器包括：第一变型换能器永磁体216、217、218、219；第一变型换能器上、下部左侧永磁体支架227、228、第一变型换能器上、下部右侧永磁体支架229、230；第一变型换能器左侧、右侧传动臂225、226；第一变型换能器左侧、右侧换能器弹性件222、223；第一变型换能器弹性件固定件224；第一变型换能器驱动轴211，这些零件被固联在一起。
在本例中，第一变型换能器上部左侧永磁体216在朝向驱动线圈114方向的磁极极性为S极，第一变型换能器下部左侧永磁体217在朝向驱动线圈114方向的磁极极性为S极，第一变型换能器上部右侧永磁体219在朝向驱动线圈114方向的磁极极性为N极，第一变型换能器下部右侧永磁体218在朝向驱动线圈114方向的磁极极性为N极。第一变型换能器永磁体216、217、218、219可以相对于第一换能器弹性件固定件224移动。当然，这些永磁体的配置还可 以有其他很多方案，例如右侧永磁体219和218在朝向驱动线圈114方向的磁极极性为S极，左侧永磁体216和217在朝向驱动线圈114方向的磁极极性为N极，等等。
第一变型换能器左侧传动臂225、第一变型换能器上部左侧永磁体支架227、第一变型换能器下部左侧永磁体支架228、第一变型换能器上部左侧永磁体216、第一变型换能器下部左侧永磁体217固联且处于左侧换能器弹性件222之下的部分称为第一变型换能器左侧下部部分。第一变型换能器右侧传动臂226、第一变型换能器上部右侧永磁体支架229、第一变型换能器下部右侧永磁体支架230、第一变型换能器上部右侧永磁体219、第一变型换能器下部右侧永磁体218固联且处于右侧换能器弹性件223之下的部分称为第一变型换能器右侧下部部分。第一变型换能器左侧下部部分和第一变型换能器右侧下部部分存在至少一个间隙，该间隙可以允许至少一个第一变型换能器左侧永磁体(例如永磁体217)相对于一个极性相反的右侧永磁体(例如永磁体218)运动。
在本例中，第一变型换能器左侧下部部分和第一变型换能器右侧下部部分存在二个间隙234、235。这些间隙使至少一个左侧永磁体(例如永磁体217)和至少一个极性相反的右侧永磁体(例如永磁体218)相互独立。也可以理解为，在驱动轴纵向轴线两侧分布有四个可移动的永磁体，这四个可移动的永磁体在朝向驱动线圈114方向上，至少一个左侧永磁体(例如永磁体217)的磁极极性和一个右侧永磁体(例如永磁体218)的磁极极性相反。至少一个左侧永磁体(例如永磁体217)和一个极性相反的右侧永磁体(例如永磁体218)相互独立，也可理解为，至少一个左侧永磁体(例如永磁体217)可以相对于极性相反的右侧永磁体(例如永磁体218)运动。
图11A为第一变型换能器和变型驱动线圈的组合示意图；图11B为图11A所示驱动线圈次级绕组电流方向和永磁体受力方向说明图。与图1-7中所示的永磁体的放置方式不同。如图11A、11B所示，由于第一变型换能器永磁体支架227、228、229、230由高导磁 材料制成，因此，第一变型换能器永磁体支架的磁阻很小，永磁体的大部分磁通在永磁体支架中流通。依磁场理论，第一变型换能器上部左侧永磁体支架227在面向间隙234的平面上形成N磁极，第一变型换能器上部右侧永磁体支架229在面向间隙234的平面上形成S磁极，从而第一变型换能器上部左侧永磁体支架227面向间隙234的N磁极和第一变型换能器上部右侧永磁体支架229面向间隙234的S磁极产生磁场力，此磁场力为吸引力，此磁场力的特性表现为维持间隙234中的磁力线长度最短。
由于制造误差或其它干扰，造成如图11A和图11B所示的磁场力F6、F8和F5、F7的大小不相等，从而破坏了清洁用具换能器受力平衡的状态，不平衡受力的换能器将产生除旋转运动之外的平动趋势，从而损失能量并产生噪音，本例中的间隙234、235可有效地修正不平衡力。假设F8＞F7，F6＞F5，则清洁用具换能器右侧受到的向内的力大于清洁用具换能器左侧受到的向外的力。第一变型换能器上部右侧永磁体支架229相对于第一变型换能器上部左侧永磁体支架227向内运动，使间隙234中的磁力线长度变长，由于第一变型换能器上部右侧永磁体支架229和第一变型换能器上部左侧永磁体支架227产生的存在于间隙234中的磁场力倾向于维持磁力线最短，因此该磁场力将反抗向内的不平衡力引起的运动，产生作用于第一变型换能器上部右侧永磁体支架229向外的磁场力，从而间隙234中的磁场力修正不平衡力所产生的运动，即该磁场力倾向于维持第一变型换能器上部右侧永磁体支架229和第一变型换能器上部左侧永磁体支架227的相对位置不变，使清洁用具的运动更平稳。间隙234中的磁场力的大小决定了它对不平衡力的响应程度，依电磁学理论知，间隙234中磁场的有效体积影响磁场力的大小，也可以说间隙234的长度影响磁场力的大小。同时，永磁体的磁场强度也影响磁场力的大小。
通过大量试验得出，间隙234的长度优选介于0.1mm～2mm，更优选的是，间隙为0.2mm～1mm。间隙235具有相同的功能，原 理相同。类似地，如图4、5、7和13所示，换能器130左侧下部部分和该换能器右侧下部部分之间的上间隙131及换能器130左侧下部部分和该换能器右侧下部部分之间的下间隙129具有与间隙234和间隙235相同的功能，以及第二变型换能器左侧下部部分和该换能器右侧下部部分之间的上间隙332和第二变型换能器左侧下部部分和该换能器右侧下部部分之间的下间隙333具有与间隙234和间隙235相同的功能，在此不再详述。
如图11B所示，与对换能器130的分析类似，在第一变型换能器变型驱动线圈214中，相对于驱动轴纵向轴线两侧分布有四个可移动的永磁体216、217、218和219，且至少一个左侧永磁体(例如永磁体217)和一个磁极极性相反的右侧永磁体(例如永磁体218)相互独立。两个可移动且相互独立的永磁体217、218在朝向变型驱动线圈214方向上的各自极性相反；该两个可移动且相互独立的永磁体217、218受到来自变型驱动线圈214的反作用力而运动，所述左侧、右侧永磁体217、218的运动方向和变型驱动线圈铁芯215纵向轴线方向(即，指向如图11A所示的沿垂直于纸面向内或向外方向)近似平行，也就是说，其夹角为大于170°且小于190°或者大于-10°且小于10°。
当然，换能器永磁体的位置分布还可以有多种，例如，可将换能器130和第一变型换能器中永磁体的位置和数量任意组合，这些方案均未超出本发明范围。
如图4、5和7所示，优选换能器弹性件122、123包括矩形弹性件或片型弹性件。
如图4、5和7所示，在换能器130的示例中，左侧、右侧换能器弹性件122、123为长方体形金属弹性片，左侧、右侧换能器弹性件122、123两端分别固联于换能器弹性件固定件124和换能器左侧、右侧传动臂125、126，左侧换能器弹性件122承接来自左侧永磁体116的运动和能量，右侧换能器弹性件123承接来自右侧永磁体117的运动和能量。该例中，换能器弹性件固定件124被固定在 手柄1中，换能器左侧、右侧传动臂125、126可相对于换能器弹性件固定件124发生符合弹性件挠曲规律的运动。换能器左侧、右侧传动臂125、126固联于换能器弹性件122、123上方且和驱动轴111固联，清洁元件3固联在清洁元件载体2上，清洁组件可拆卸地联接在驱动轴111上。所属领域技术人员可设计出合理的驱动轴111和清洁组件结构，使得驱动轴111有效地驱动清洁组件。当可移动且相互独立的永磁体116、117受到来自驱动线圈114的反作用力作用而运动时，换能器弹性件122、123随永磁体116、117的运动而运动，换能器弹性件122、123不断吸收能量和释放能量，当换能器弹性件122、123的响应频率和驱动线圈114的电流频率相接近时，换能器的能量转换效率显著提高，整个电动牙刷处于高效率状态。由于左侧永磁体116的运动受到左侧换能器弹性件122的约束，当左侧永磁体116受到近似平行于驱动线圈铁芯115纵向轴线的反作用力时，换能器左侧传动臂125和左侧永磁体116围绕以换能器弹性件固定件124和左侧换能器弹性件122的分界线为轴线做弯曲运动，同样，换能器右侧传动臂126和右侧永磁体117围绕以换能器弹性件固定件124和右侧换能器弹性件123的分界线为轴线做弯曲运动。驱动轴111纵向轴线相对于换能器弹性件122、123和换能器弹性件固定件124分界线近似平行，较优选地，其夹角大于等于0°且小于15°，且驱动轴111的纵向轴线到左侧、右侧换能器弹性件122、123的最短距离相等。
所述示例中，左侧永磁体116和右侧永磁体117受到的反作用力大小近似相等，优选幅值差约在10％以内，方向近似相反，方向夹角在10°以内，左侧换能器弹性件122和右侧换能器弹性件123的抗弯截面系数和长度近似相等，优选幅值差在10％以内，所以左侧换能器弹性件122的挠度和右侧换能器弹性件123的挠度幅值近似相等，幅值差在10％以内，各自挠度方向相反。因此，驱动轴111受到近似交变的平衡力的作用，且该交变平衡力产生交变转矩，形成驱动轴111高速往复、高效的转动。同样，第一变型换能器和第 二变型换能器也可以获得相似效果。
根据本发明，换能器弹性件的个数可以是多个。如图14所示，可以配置三个换能器弹性件401、402、403，其中两个换能器弹性件，例如换能器弹性件401和402，之间的夹角为2α，0°＜α＜90°，该两个换能器弹性件401和402中任一个与第三个换能器弹性件403之间的夹角为δ，δ＝(360°-2α)/2。
如图4、5、7和14所示，通过合理配置弹性件401、402、403的抗弯截面系数和长度，可以使换能器左侧、右侧传动臂作用于驱动轴上的力大小近似，优选使换能器左侧、右侧传动臂125、126作用于驱动轴上的力的幅值差在10％以内，力的方向相反，且左侧、右侧传动臂125、126对驱动轴纵向轴线的力矩大小近似，优选使换能器左侧、右侧传动臂125、126相对于驱动轴纵向轴线的力矩的幅值差在10％以内，力矩的方向相同，从而实现驱动轴带动清洁元件载体2和清洁元件3平稳、高速地往复转动。
图13示出了第二变型换能器，其与图7所示的换能器、图9所示的第一变型换能器的不同之处在于，在图7、9所示的实施例中，设置单个弹性固定件124或224，与换能器左侧传动臂125或225、换能器右侧传动臂126或226距驱动轴111或211的轴线的距离相比，单个换能器弹性件固定件124更靠近驱动轴111的轴线；而在图13的示例中，设有两个弹性固定件，分别为左侧换能器弹性固定件324和右侧换能器弹性固定件325，分别与换能器左侧传动臂326和换能器右侧传动臂327距驱动轴311的轴线的距离相比，此两个弹性固定件324、325更远离驱动轴311的轴线。当然，无论设置几个换能器弹性件固定件，这些结构的共同特征是：至少两个换能器弹性件分布在驱动轴111、211或311的纵向轴线两侧，且位于驱动轴111、211或311的纵向轴线同侧的永磁体和换能器弹性件的一端相联结。换能器弹性件传动臂相对于相应的换能器弹性件固定件可相对移动，在驱动轴纵向轴线两侧至少有一对换能器弹性件传动臂。所述一对换能器弹性件传动臂的运动方向夹角大于90°且小于270 °。据此，只要合理设计永磁体的形状、位置和换能器弹性件的形状、位置，以及弹性件的抗弯曲截面系数和抗扭转截面系数的大小就可实现清洁器件的高效运动，且可扩大换能器弹性件几何尺寸的选择范围。

Claims (11)

  1. 一种个人清洁护理用具，包括：
    手柄，其包括手柄外壳，所述手柄外壳内部装有用以向所述个人清洁护理用具的各个部分提供电力的电源部分、用以控制所述个人清洁护理用具的各种工作模式以及所述个人清洁护理用具的开启或关闭的控制部分、用以启动或关闭所述个人清洁护理用具运转的触发部分和将输入的电能转换为机械能输出的驱动器，所述驱动器包括换能器、驱动线圈、设置在所述驱动线圈中的驱动线圈铁芯、用于支承所述驱动器的驱动器左侧支架和驱动器右侧支架；
    清洁组件，其包括清洁元件载体和分布在清洁元件载体上的清洁元件，清洁组件与驱动轴可拆卸地联接在一起；
    其特征在于，所述换能器包括插入所述清洁组件的驱动轴，至少一个紧固于所述驱动器左、右侧支架的换能器弹性件固定件、至少两个相对于所述驱动轴纵向轴线布置在左右两侧的永磁体、用于固联所述永磁体的相应的永磁体支架、与所述永磁体支架固联并与所述驱动轴固联的左、右侧换能器传动臂以及至少两个设置在所述驱动轴纵向轴线左右两侧的左侧换能器弹性件和右侧换能器弹性件，所述左、右侧换能器弹性件的一端分别与所述换能器弹性件固定件固联，所述左、右侧换能器弹性件的另一端分别与相应的换能器传动臂固联；其中，所述左、右侧永磁体相互独立，所述一侧永磁体在朝向驱动线圈方向的磁极极性为S极或N极，所述另一侧永磁体在朝向驱动线圈方向的磁极极性与所述一侧永磁体的磁极极性相反，所述左、右侧永磁体被设置成使得它们的内部磁力线方向和驱动线圈铁芯纵向轴线方向的夹角分别大于45°且小于135°，左、右侧永磁体可相对于所述换能器弹性件固定件移动；当驱动线圈通过频率为f0的交变电流时，左、右侧永磁体的运动方向和驱动线圈铁芯纵向轴线方向近似平行，即二者的夹角大于170°且小于190°或大于-10°且小于10°。
  2. 如权利要求1所述的个人清洁护理用具，其特征在于，所述左、右侧永磁体被设置成使得它们的内部磁力线方向和所述驱动线圈铁芯纵向轴线方向的夹角为90°。
  3. 如权利要求1所述的个人清洁护理用具，其特征在于，所述换能器左侧传动臂、关于驱动轴纵向轴线与该传动臂同侧的左侧永磁体和相应的永磁体支架固联且处于关于驱动轴纵向轴线与所述传动臂同侧的左侧换能器弹性件之下的部分限定为换能器左侧下部部分，所述换能器右侧传动臂、右侧永磁体和相应的永磁体支架固联且处于右侧换能器弹性件之下部分限定为换能器右侧下部部分，所述换能器左侧下部部分和所述换能器右侧下部部分之间存在至少一个间隙，该间隙中存在足以补偿由于不平衡力引起换能器平动的磁场力，且允许至少一个永磁体相对于极性相反的另一个永磁体运动。
  4. 如权利要求3所述的个人清洁护理用具，其特征在于，所述换能器左侧下部部分和所述换能器右侧下部部分之间的间隙长度为0.1mm至2mm。
  5. 如权利要求3所述的个人清洁护理用具，其特征在于，所述换能器左侧下部部分和所述换能器右侧下部部分之间的间隙长度为0.2mm至1mm。
  6. 如权利要求1至3中任一项所述的个人清洁护理用具，其特征在于，所述左、右侧永磁体为长方体形钕铁硼永磁体，其长为5mm至30mm，宽为2mm至20mm，高为1mm至10mm。
  7. 如权利要求1至3中任一项所述的个人清洁护理用具，其特征在于，所述换能器设有四个永磁体，所述左侧永磁体和右侧永磁体设置为使它们受到的反作用力大小近似相等，幅值差在10％以内，方向近似相反，方向夹角在10°以内。
  8. 如权利要求1至3中任一项所述的个人清洁护理用具，其特征在于，所述左、右侧换能器弹性件包括矩形弹性件或片型弹性件。
  9. 如权利要求1至3中任一项所述的个人清洁护理用具，其特征在于，所述换能器设有两个换能器弹性件，它们对称地分布在所 述驱动轴纵向轴线的左右两侧，所述两个换能器弹性件的夹角为180°；其中，所述左侧换能器弹性件和所述右侧换能器弹性件设置为它们的抗弯截面系数和长度近似相等，幅值差在10％以内，致使左侧换能器弹性件的挠度和右侧换能器弹性件的挠度幅值近似相等，幅值差在10％以内，各自挠度方向相反。
  10. 如权利要求1至3中任一项所述的个人清洁护理用具，其特征在于，所述换能器设有三个换能器弹性件，其中两个换能器弹性件之间的夹角为2α，0°＜α＜90°，该两个换能器弹性件中任一个与第三个换能器弹性件之间的夹角为δ，δ＝(360°-2α)/2。
  11. 如权利要求1至3中任一项所述的个人清洁护理用具，其特征在于，所述用于个人清洁护理的用具包括电动牙刷、电动剃须刀、电动洁面器、电动沐浴器。
PCT/CN2015/071696 2015-01-28 2015-01-28 个人清洁护理用具 Ceased WO2016119136A1 (zh)

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CA2975155A CA2975155C (en) 2015-01-28 2015-01-28 Personal cleaning care appliance
ES15879347T ES2783549T3 (es) 2015-01-28 2015-01-28 Instrumento de limpieza y cuidado personal
KR1020177021222A KR101971043B1 (ko) 2015-01-28 2015-01-28 개인 청결 관리 도구
US15/547,460 US10463460B2 (en) 2015-01-28 2015-01-28 Personal cleaning care appliance
PCT/CN2015/071696 WO2016119136A1 (zh) 2015-01-28 2015-01-28 个人清洁护理用具
EP15879347.1A EP3252935B1 (en) 2015-01-28 2015-01-28 Implement for personal cleaning and care

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