WO2007125491A1 - Cutting device and hair-cutting apparatus - Google Patents

Cutting device and hair-cutting apparatus Download PDF

Info

Publication number
WO2007125491A1
WO2007125491A1 PCT/IB2007/051549 IB2007051549W WO2007125491A1 WO 2007125491 A1 WO2007125491 A1 WO 2007125491A1 IB 2007051549 W IB2007051549 W IB 2007051549W WO 2007125491 A1 WO2007125491 A1 WO 2007125491A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting device
blades
hair
cutting
blade
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/IB2007/051549
Other languages
French (fr)
Inventor
Manfred Tautscher
Rene Wadsack
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to CN2007800156906A priority Critical patent/CN101432104B/en
Priority to AT07735668T priority patent/ATE457215T1/en
Priority to US12/298,920 priority patent/US8132332B2/en
Priority to JP2009508583A priority patent/JP5174808B2/en
Priority to EP07735668A priority patent/EP2015904B1/en
Priority to DE602007004723T priority patent/DE602007004723D1/en
Publication of WO2007125491A1 publication Critical patent/WO2007125491A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/06—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving co-operating cutting elements both of which have shearing teeth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/3846—Blades; Cutters

Definitions

  • the present invention relates to a cutting device for a cutting apparatus, in particular a hair-cutting apparatus.
  • the present invention further relates to a hair-cutting apparatus with a cutting device according to the present invention.
  • a hair-cutting apparatus usually has a cutting device with two blades moved relatively to one another with help of a motor.
  • the cutting device is normally mounted on a casing of the hair-cutting apparatus housing the motor or batteries as power supply for the hair-cutting device, wherein the casing also serves as handle for hand- held hair-cutting systems.
  • the hairs to be cut are caught between the teeth of the blades and severed due to the reciprocating movement of the blades.
  • the stationary blade is often chosen to be next to the skin with hair to be cut, thus shielding the skin from the reciprocating blade to avoid injuries.
  • EP 0 914 234 Bl describes a hair-cutting apparatus with a toothed cutting device.
  • the toothed cutting device comprises two toothed cutters with cutter-tooth rows. Both cutters are reciprocatingly drivable relative to another. Both cutters lie against one another in the area of their respective cutter-tooth rows.
  • the cutting device comprises a steel spring device.
  • the spring device comprises a substantially U-shaped central portion, two wound spring portions at the limbs of the U-shaped portion, and two bent end portions, such that the central portion and the end portions tend to move towards one another.
  • the spring device is arranged between the cutters such that they are pressed towards one another with a given spring force. If the gap between both cutters were too large, the hair caught between the cutters' teeth would not get severed. It is an object of the present invention to further simplify the cutting device and the hair-cutting apparatus of the state of the art.
  • this object is achieved by a cutting device, in particular for a hair-cutting apparatus, with two toothed blades arranged to be moveable with respect to each other, this cutting device comprising magnetic means arranged to press both blades together.
  • the design of the cutting device is simplified in that no spring devices, be it e.g. flat springs or leg springs, need anymore to be provided and accommodated in the cutting device. This provides a new design freedom for the cutting device.
  • a major advantage of the using magnetic means for pressing the blades together is that no friction or, in case of a leg spring, no stiffness has to be overcome for the reciprocating movement of the blades.
  • the energy consumption of a drive unit or some cutting apparatus for driving the blades is significantly lowered. More energy can be used for the cutting or severing process as such and improve the cut quality.
  • the cutting device according to the present invention is particularly well suited for a hair-cutting apparatus, but may as well be used with any cutting apparatus relying on the principle of reciprocating blades such as a cutting apparatus for cutting grass or trimming hedges, or for cutting paper, textiles or fibers, for example.
  • the cutting device comprises a magnetic element arranged on one of the blades, while the other blade contains magnetizable material.
  • the magnetic element can be chosen depending on the magnetic force needed, and, on the other hand, that the amount of supplemental space and additional components is reduced, as one of the blade is itself a magnetic means. If one uses one reciprocating blade and one stationary blade, advantageously, the magnetic unit is attached to the stationary blade to further reduce energy consumption, because the magnetic unit has not to be moved, too.
  • the cutting device comprises a linkage element connected to one of the blades for driving it to a reciprocating movement, whereas the other blade is stationary, and wherein a magnetic element is arranged on the moveable blade, while the stationary blade contains magnetizable material.
  • the linkage element may be used to couple the cutting device to the drive unit of a cutting apparatus, especially of a hair-cutting apparatus.
  • the linkage element, the reciprocating blade and the magnetic element are arranged such that the linkage element encompasses the magnetic element to fix it against the reciprocating blade.
  • the linkage element is arranged between both blades. This leads to a compact design of the cutting device, as the need for space is reduced.
  • the linkage element may be used to define the distance of the toothed blades at their teeth tips.
  • the linkage element comprises a transmission element.
  • the transmission element has the function of an interface between the linkage element of the cutting device and some transmission system of a cutting apparatus, particularly of a hair- cutting apparatus, transmitting and eventually converting the movement of the drive unit of the apparatus into a linear, reciprocating movement.
  • Providing the transmission element at one of the ends of the linkage element allows for more freedom of design of the transmission unit compared with a transmission element in the middle of the linkage element.
  • an air gap is provided between the magnetic means and a blade. This is particularly advantageous to set the magnetic force acting on the blade, as the magnetic force depends on the dimensions and characteristics of the magnetic means as well as on the height of the air gap. For different embodiments intended to different uses, different magnetic forces may be necessary. To reduce the design and production cost, the air gap is a very convenient parameter to change.
  • this object is achieved by a hair- cutting apparatus comprising a cutting device according to the present invention.
  • a new freedom of design is provided.
  • the reduced energy consumption allows using smaller batteries and/or smaller drive units, e.g. smaller motors and smaller transmission systems.
  • the freedom of design is further enhanced by the possibility of a smaller cutting device and by the possibility of the transmission element of the linkage element of the cutting device being not only in the middle, but also on one of the ends of the linkage element.
  • the hair-cutting apparatus may be of any known kind of hair-cutting apparatus, e.g. for human hair-cutting for both men and women on all body areas, be it beard, head or full body grooming, for personal or professional use, for pet clipper systems, or for surgical one-use trimmers that are used for removing hair from body areas before a surgery.
  • Other possibilities are combined shaver-/hair-cutting apparatus having in addition to a cutting device a shaving unit, e.g. a rotor shaver or foil shaver.
  • Figs, la-c show a preferred embodiment of the hair-cutting apparatus according to the present invention.
  • Figs. 2a-f illustrate different views of a preferred embodiment of the cutting device according to the present invention.
  • Fig. 3 illustrates schematically the function of the magnetic means in the cutting device according to the present invention.
  • FIGS Ia, b, c show a hair-cutting apparatus 1, which is often referred to as a hair trimmer.
  • the hair trimmer 1 has a casing 3, which has been given a slightly curved and angled shape as well as grips 5 in order to achieve an ergonomically favorable construction.
  • a button 6 has been arranged to unlock a cutting unit 2 mounted on the casing 3 to detach it from the casing 3 to replace it with other units, such as e.g. a cutting unit with different dimensions or a foil- shaving unit.
  • the casing 3 of the hair trimmer 1 has two guide ways 7 adapted to receive guide members of a comb attachment (not shown in Figures la-c) at different positions to allow different hair cut lengths.
  • a further slide button 4 has been arranged in a central area of the casing 3.
  • This slide button 4 is slideable between two positions to switch on or off an electric drive motor accommodated inside the casing 3.
  • the drive motor together with a transmission system inside the casing 3, are adapted to drive the blades of a cutting device 2.
  • the drive motor is powered by a rechargeable battery housed in the casing 3 as well. It will be noted that other means of powering the motor are possible such as using an external power supply or a primary battery.
  • the design of the cutting device is simplified in that no spring devices, be it e.g. flat springs or leg springs, need anymore to be provided and accommodated in the cutting device. This provides a new design freedom for the cutting device as well 2 as for the hair trimmer 1.
  • a preferred embodiment of the cutting device 2 is shown in exploded view in Figure 2a, in a front view in Figure 2b, in a side vide in Figure 2c, in a perspective view in Figure 2d, in a top view in Figure 2e, and in a cut view in Figure 2f.
  • the main components of the cutting device 2 are the two blades 201, 203. Both blades 201 , 203 have teeth 211, 231. Hair to be cut is caught between the teeth 211 , 231 and is severed by a reciprocating movement of both blades 201, 203 with respect to each other.
  • the lower blade 201 is stationary and called guard, because its additional function is to guard the skin of being injured by the reciprocating, upper blade 203, also called cutter.
  • Both blades are made of steel and, thus, are magnetizable.
  • the cutter 203 is mounted on a linkage element 205, also called driving bridge.
  • the driving bridge 205 has an opening with protrusions 255 (only one visible in Figure 2a) to accommodate a magnet 207 having recesses 271, 273 complementary to the protrusions 255 at its lower edges to be encompassed by the driving bridge 205.
  • the driving bridge 205 has two shafts 251, 252 and two hooked shafts 253, 254 to be accommodated and snap in the appropriate openings 232, 233, 234, 235 in the cutter 203.
  • the cutter 203 is mounted on the driving bridge 205 after the magnet 207 has been placed in the driving bridge 205.
  • the position of the magnet 207 in the cutting unit 2 is well defined and fixed. Two avoid an unintentional dismounting of the driving bridge 205 and the cutter 203, the two shafts 251, 252 can be warm riveted.
  • the driving bridge 205 has two rips on its lower side as well (not visible) to be snapped into the slots 213, 215 of the guard 201.
  • the slots 213, 215 have a guiding function for the reciprocating movement of the driving bridge 205, and with it of the magnet 207 and the cutter 203.
  • the gliding surface 212 of the guard 201 for the driving bridge 205 is ground and an air gap 208 (see Figure 3) is provided between the magnet 207 and the guard 201.
  • the air gap 208 defines the force acting between the cutter 203 and the guard 201.
  • the driving bridge 205 has a transmission element 209 on one of its ends.
  • the transmission element 209 is an interface between the cutting device 2 and the drive unit of the hair trimmer, the drive unit having a motor producing a revolving movement and a transmission system converting the revolving movement into a linear, reciprocating movement.
  • the transmission element 209 transmits the linear, reciprocating movement to the driving bridge in order to move the cutter 203 in a reciprocating way with respect to the guard 201. It will be noted that the transmission element 209 may be arranged somewhere between the ends of the driving bridge 205 in other embodiments.
  • both blades 201, 203 are pressed together using magnetic means 207.
  • a magnet 207 with a north pole N and south pole S generating a magnetic field (dotted lines) is arranged in between the cutter 203 and the guard 201.
  • the cutter 203 and the guard 201 being of steel, both, guard 201 and cutter 203, are attracted by the magnet 207 and, thus, pressed together in particular in the area of the teeth 211, 213.
  • the height of the air gap 208 will be chosen depending on the dimensions of the magnet 207 and the magnetic force one needs to act between the magnet 207 and the blades 201, 203.
  • the height of the air gap 208 is in the range of tenth of millimeters.
  • a magnet could be attached to each blade, or a magnet could be attached to the guard, the cutter being magnetizable, etc..
  • blades made of steel blades containing enough amount of e.g. nickel or cobalt instead of iron could be used as well.
  • one major function of the driving bridge 205 in addition to driving the cutter 203 and positioning the magnet 207, is to determine the position of the cutter 203 with respect to the guard 201, in particular the distance between the tips of the teeth 211 of the guard 201 and the tips of the teeth 231 of the cutter 203. This distance is an important parameter when both improving the cut efficiency and reducing the probability of skin injuries due to the cutting.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)

Abstract

To achieve a new freedom of design as well as a reduced energy consumption, a cutting device (2) and a hair-cutting apparatus with two toothed blades (201, 203) arranged to be moveable with respect to each other are proposed, the cutting device (2) comprising magnetic means (207) arranged to press both blades (201, 203) together.

Description

Cutting device and hair-cutting apparatus
The present invention relates to a cutting device for a cutting apparatus, in particular a hair-cutting apparatus.
The present invention further relates to a hair-cutting apparatus with a cutting device according to the present invention.
A hair-cutting apparatus usually has a cutting device with two blades moved relatively to one another with help of a motor. The cutting device is normally mounted on a casing of the hair-cutting apparatus housing the motor or batteries as power supply for the hair-cutting device, wherein the casing also serves as handle for hand- held hair-cutting systems.
The hairs to be cut are caught between the teeth of the blades and severed due to the reciprocating movement of the blades. Usually, only one of the blades is reciprocating while the other one is stationary. For safety reasons, the stationary blade is often chosen to be next to the skin with hair to be cut, thus shielding the skin from the reciprocating blade to avoid injuries.
EP 0 914 234 Bl describes a hair-cutting apparatus with a toothed cutting device. The toothed cutting device comprises two toothed cutters with cutter-tooth rows. Both cutters are reciprocatingly drivable relative to another. Both cutters lie against one another in the area of their respective cutter-tooth rows. To have both cutters lie properly against one another, the cutting device comprises a steel spring device. The spring device comprises a substantially U-shaped central portion, two wound spring portions at the limbs of the U-shaped portion, and two bent end portions, such that the central portion and the end portions tend to move towards one another. The spring device is arranged between the cutters such that they are pressed towards one another with a given spring force. If the gap between both cutters were too large, the hair caught between the cutters' teeth would not get severed. It is an object of the present invention to further simplify the cutting device and the hair-cutting apparatus of the state of the art.
In a first aspect of the present invention, this object is achieved by a cutting device, in particular for a hair-cutting apparatus, with two toothed blades arranged to be moveable with respect to each other, this cutting device comprising magnetic means arranged to press both blades together.
By utilizing magnetic means, e.g. magnetic units or magnetized components next to the blades or magnetized blades to press the blades against one another, the design of the cutting device is simplified in that no spring devices, be it e.g. flat springs or leg springs, need anymore to be provided and accommodated in the cutting device. This provides a new design freedom for the cutting device.
A major advantage of the using magnetic means for pressing the blades together is that no friction or, in case of a leg spring, no stiffness has to be overcome for the reciprocating movement of the blades. Thus the energy consumption of a drive unit or some cutting apparatus for driving the blades is significantly lowered. More energy can be used for the cutting or severing process as such and improve the cut quality.
The cutting device according to the present invention is particularly well suited for a hair-cutting apparatus, but may as well be used with any cutting apparatus relying on the principle of reciprocating blades such as a cutting apparatus for cutting grass or trimming hedges, or for cutting paper, textiles or fibers, for example.
Preferably, the cutting device comprises a magnetic element arranged on one of the blades, while the other blade contains magnetizable material. This has, on the one hand, the advantage that the magnetic element can be chosen depending on the magnetic force needed, and, on the other hand, that the amount of supplemental space and additional components is reduced, as one of the blade is itself a magnetic means. If one uses one reciprocating blade and one stationary blade, advantageously, the magnetic unit is attached to the stationary blade to further reduce energy consumption, because the magnetic unit has not to be moved, too.
In preferred embodiments, the cutting device comprises a linkage element connected to one of the blades for driving it to a reciprocating movement, whereas the other blade is stationary, and wherein a magnetic element is arranged on the moveable blade, while the stationary blade contains magnetizable material. The linkage element may be used to couple the cutting device to the drive unit of a cutting apparatus, especially of a hair-cutting apparatus. Preferably, the linkage element, the reciprocating blade and the magnetic element are arranged such that the linkage element encompasses the magnetic element to fix it against the reciprocating blade. Thus, the position of the magnetic element with respect to the moveable blade is well defined. Advantageously, the linkage element is arranged between both blades. This leads to a compact design of the cutting device, as the need for space is reduced. Furthermore, the linkage element may be used to define the distance of the toothed blades at their teeth tips.
Preferably, the linkage element comprises a transmission element. The transmission element has the function of an interface between the linkage element of the cutting device and some transmission system of a cutting apparatus, particularly of a hair- cutting apparatus, transmitting and eventually converting the movement of the drive unit of the apparatus into a linear, reciprocating movement. Providing the transmission element at one of the ends of the linkage element allows for more freedom of design of the transmission unit compared with a transmission element in the middle of the linkage element.
In preferred embodiments, an air gap is provided between the magnetic means and a blade. This is particularly advantageous to set the magnetic force acting on the blade, as the magnetic force depends on the dimensions and characteristics of the magnetic means as well as on the height of the air gap. For different embodiments intended to different uses, different magnetic forces may be necessary. To reduce the design and production cost, the air gap is a very convenient parameter to change.
In a further aspect of the present invention, this object is achieved by a hair- cutting apparatus comprising a cutting device according to the present invention.
By utilizing magnetic means, e.g. magnetic units or magnetized components next to the blades or magnetized blades to press the blades against one another, not only for the cutting device but also for the hair-cutting apparatus a new freedom of design is provided. The reduced energy consumption allows using smaller batteries and/or smaller drive units, e.g. smaller motors and smaller transmission systems. The freedom of design is further enhanced by the possibility of a smaller cutting device and by the possibility of the transmission element of the linkage element of the cutting device being not only in the middle, but also on one of the ends of the linkage element.
The hair-cutting apparatus may be of any known kind of hair-cutting apparatus, e.g. for human hair-cutting for both men and women on all body areas, be it beard, head or full body grooming, for personal or professional use, for pet clipper systems, or for surgical one-use trimmers that are used for removing hair from body areas before a surgery. Other possibilities are combined shaver-/hair-cutting apparatus having in addition to a cutting device a shaving unit, e.g. a rotor shaver or foil shaver.
The reduced energy consumption due to magnetic means for pressing together the blades of the hair-cutting apparatus' cutting device leads to longer running times of the hair-cutting apparatus. This as well as the now possible smaller design of cutting device and hair-cutting apparatus reduces costs for production and for operation. The consumer will also appreciate that a smaller hair-cutting apparatus is easier to handle.
A detailed description of the invention is provided below. Said description is provided by way of a non- limiting example to be read with reference to the attached drawings in which:
Figs, la-c show a preferred embodiment of the hair-cutting apparatus according to the present invention;
Figs. 2a-f illustrate different views of a preferred embodiment of the cutting device according to the present invention; and
Fig. 3 illustrates schematically the function of the magnetic means in the cutting device according to the present invention.
Figures Ia, b, c show a hair-cutting apparatus 1, which is often referred to as a hair trimmer. The hair trimmer 1 has a casing 3, which has been given a slightly curved and angled shape as well as grips 5 in order to achieve an ergonomically favorable construction. In a dorsal area of the casing 3 a button 6 has been arranged to unlock a cutting unit 2 mounted on the casing 3 to detach it from the casing 3 to replace it with other units, such as e.g. a cutting unit with different dimensions or a foil- shaving unit. The casing 3 of the hair trimmer 1 has two guide ways 7 adapted to receive guide members of a comb attachment (not shown in Figures la-c) at different positions to allow different hair cut lengths. In a central area of the casing 3, a further slide button 4 has been arranged.
This slide button 4 is slideable between two positions to switch on or off an electric drive motor accommodated inside the casing 3. The drive motor, together with a transmission system inside the casing 3, are adapted to drive the blades of a cutting device 2. The drive motor is powered by a rechargeable battery housed in the casing 3 as well. It will be noted that other means of powering the motor are possible such as using an external power supply or a primary battery.
Due to utilizing magnetic means, e.g. magnetic units or magnetized components next to the blades or magnetized blades to press the blades against one another, as will be explained with respect to a preferred embodiment illustrated in Figures 2, 3, the design of the cutting device is simplified in that no spring devices, be it e.g. flat springs or leg springs, need anymore to be provided and accommodated in the cutting device. This provides a new design freedom for the cutting device as well 2 as for the hair trimmer 1.
By using magnetic means for pressing the blades together is that no friction or, in case of a leg spring, no stiffness has to be overcome for the reciprocating movement of the blades. Thus the energy consumption of the drive motor is significantly lowered. More energy can be used for the cutting or severing process as such and improve the cut quality. The reduced energy consumption also leads to longer running times of the hair trimmer 1. The reduced energy consumption further allows using smaller batteries and a smaller drive motors and transmission system. In the example illustrated in Figure 1, this leads to a slim and light design of the casing 3 and the cutting device 2, which makes the hair trimmer particularly easy to handle.
A preferred embodiment of the cutting device 2 is shown in exploded view in Figure 2a, in a front view in Figure 2b, in a side vide in Figure 2c, in a perspective view in Figure 2d, in a top view in Figure 2e, and in a cut view in Figure 2f.
The main components of the cutting device 2 are the two blades 201, 203. Both blades 201 , 203 have teeth 211, 231. Hair to be cut is caught between the teeth 211 , 231 and is severed by a reciprocating movement of both blades 201, 203 with respect to each other. In the present example the lower blade 201 is stationary and called guard, because its additional function is to guard the skin of being injured by the reciprocating, upper blade 203, also called cutter. Both blades are made of steel and, thus, are magnetizable.
The cutter 203 is mounted on a linkage element 205, also called driving bridge. The driving bridge 205 has an opening with protrusions 255 (only one visible in Figure 2a) to accommodate a magnet 207 having recesses 271, 273 complementary to the protrusions 255 at its lower edges to be encompassed by the driving bridge 205. In addition, the driving bridge 205 has two shafts 251, 252 and two hooked shafts 253, 254 to be accommodated and snap in the appropriate openings 232, 233, 234, 235 in the cutter 203. The cutter 203 is mounted on the driving bridge 205 after the magnet 207 has been placed in the driving bridge 205. By integrating the magnet 207 in the driving bridge 205, the position of the magnet 207 in the cutting unit 2 is well defined and fixed. Two avoid an unintentional dismounting of the driving bridge 205 and the cutter 203, the two shafts 251, 252 can be warm riveted.
The driving bridge 205 has two rips on its lower side as well (not visible) to be snapped into the slots 213, 215 of the guard 201. The slots 213, 215 have a guiding function for the reciprocating movement of the driving bridge 205, and with it of the magnet 207 and the cutter 203. To ensure a smooth and frictionless reciprocating movement, the gliding surface 212 of the guard 201 for the driving bridge 205 is ground and an air gap 208 (see Figure 3) is provided between the magnet 207 and the guard 201. The air gap 208 defines the force acting between the cutter 203 and the guard 201.
The driving bridge 205 has a transmission element 209 on one of its ends. The transmission element 209 is an interface between the cutting device 2 and the drive unit of the hair trimmer, the drive unit having a motor producing a revolving movement and a transmission system converting the revolving movement into a linear, reciprocating movement. The transmission element 209 transmits the linear, reciprocating movement to the driving bridge in order to move the cutter 203 in a reciprocating way with respect to the guard 201. It will be noted that the transmission element 209 may be arranged somewhere between the ends of the driving bridge 205 in other embodiments.
For an efficient cutting process, it is important that the guard 201 and the cutter 203 are well pressed against each other. Otherwise, the hair to be cut and that is caught between the teeth 211, 231 of the guard 201 and the cutter 203 would slip between the teeth 211, 231 without being severed. As schematically illustrated in Figure 3, both blades 201, 203 are pressed together using magnetic means 207.
In the present example, a magnet 207 with a north pole N and south pole S generating a magnetic field (dotted lines) is arranged in between the cutter 203 and the guard 201. The cutter 203 and the guard 201 being of steel, both, guard 201 and cutter 203, are attracted by the magnet 207 and, thus, pressed together in particular in the area of the teeth 211, 213. In other area, there is an air gap 208 between the cutter 203 and the guard 201 to avoid any friction during operation that would increase the energy consumption. The height of the air gap 208 will be chosen depending on the dimensions of the magnet 207 and the magnetic force one needs to act between the magnet 207 and the blades 201, 203. In the present example, the height of the air gap 208 is in the range of tenth of millimeters. By using blades 201, 203 both being of magnetizable material, the magnet 207 is more efficiently attached to the cutter 203 and the guard 201 and the cutter are more efficiently pressed together.
It will be noted that various other possibilities of using magnetic means could be utilized as well. E.g., a magnet could be attached to each blade, or a magnet could be attached to the guard, the cutter being magnetizable, etc.. Besides blades made of steel, blades containing enough amount of e.g. nickel or cobalt instead of iron could be used as well.
It will further be noted, that one major function of the driving bridge 205 in addition to driving the cutter 203 and positioning the magnet 207, is to determine the position of the cutter 203 with respect to the guard 201, in particular the distance between the tips of the teeth 211 of the guard 201 and the tips of the teeth 231 of the cutter 203. This distance is an important parameter when both improving the cut efficiency and reducing the probability of skin injuries due to the cutting.
Although having described several preferred embodiments of the invention, those skilled in the art would appreciate that various changes, alterations, and substitutions can be made without departing from the spirit and concepts of the present invention. The invention is, therefore, claimed in any of its forms or modifications with the proper scope of the appended claims. For example various combinations of the features of the following dependent claims could be made with the features of the independent claim without departing from the scope of the present invention. Furthermore, any reference numerals in the claims shall not be construed as limiting scope.
List of Reference Numerals:
1 hair trimmer
2 cutting device
3 casing
4 button
5 grip
6 button
7 guide way
201 guard
203 cutter
205 driving bridge
207 magnet
208 air gap
209 transmission element
211 teeth
212 gliding surface
213, 215 slot
231 teeth
232, 233, 234, 235 opening
251, 252 shaft
253, 254 hooked shaft
255 protrusion
271, 273 recess
N north pole
S south pole

Claims

CLAIMS:
1. A cutting device (2), in particular for a hair-cutting apparatus (1), with two toothed blades (201, 203) arranged to be moveable with respect to each other, characterized in that it comprises magnetic means (207) arranged to press both blades (201, 203) together.
2. The cutting device according to claim 1, characterized in that it comprises a magnetic element (207) arranged on one of the blades (203), while the other blade (201) contains magnetic material.
3. The cutting device according to claim lor 2, characterized in that it comprises a linkage element (205) connected to one of the blades (203) for driving it to a reciprocating movement, whereas the other blade (201) is stationary, and wherein a magnetic element (207) is arranged on the moveable blade (203), while the stationary blade (201) contains magnetic material.
4. The cutting device according to claim 3, characterized in that the linkage element (205), the reciprocating blade (203) and the magnetic element (207) are arranged such that the linkage element (205) encompasses the magnetic element (207) to fix it against the reciprocating blade (203).
5. The cutting device according to claim 3 or 4, characterized in that the linkage element (205) is arranged between both blades (201, 203).
6. The cutting device according to any of claims 3 to 5, characterized in that the linkage element (205) comprises a transmission element (209) at one of its ends.
7. The cutting device according to any of claims 1 to 6, characterized in that an air gap (208) is provided between the magnetic means (207) and one of the blades (201).
8. A hair-cutting apparatus (1) comprising a cutting device (2) according to one of the claims 1 to 7.
PCT/IB2007/051549 2006-05-01 2007-04-26 Cutting device and hair-cutting apparatus Ceased WO2007125491A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN2007800156906A CN101432104B (en) 2006-05-01 2007-04-26 Cutting equipment and hair cutting devices
AT07735668T ATE457215T1 (en) 2006-05-01 2007-04-26 CUTTER AND HAIR CUTTER
US12/298,920 US8132332B2 (en) 2006-05-01 2007-04-26 Cutting device
JP2009508583A JP5174808B2 (en) 2006-05-01 2007-04-26 Cutting device and hair cutting instrument
EP07735668A EP2015904B1 (en) 2006-05-01 2007-04-26 Cutting device and hair-cutting apparatus
DE602007004723T DE602007004723D1 (en) 2006-05-01 2007-04-26 CUTTING DEVICE AND HAIR CUTTING DEVICE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06113338.5 2006-05-01
EP06113338 2006-05-01

Publications (1)

Publication Number Publication Date
WO2007125491A1 true WO2007125491A1 (en) 2007-11-08

Family

ID=38462426

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/051549 Ceased WO2007125491A1 (en) 2006-05-01 2007-04-26 Cutting device and hair-cutting apparatus

Country Status (7)

Country Link
US (1) US8132332B2 (en)
EP (1) EP2015904B1 (en)
JP (1) JP5174808B2 (en)
CN (1) CN101432104B (en)
AT (1) ATE457215T1 (en)
DE (1) DE602007004723D1 (en)
WO (1) WO2007125491A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1974875A1 (en) 2007-03-30 2008-10-01 WAHL GmbH Cutting unit for an electric hair cutting machine and electric hair cutting machine
US8132332B2 (en) * 2006-05-01 2012-03-13 Koninklijke Philips Electronics N.V. Cutting device
US10124498B2 (en) 2014-04-18 2018-11-13 Koninklijke Philips N.V. Blade set, hair cutting appliance, and related manufacturing method
USD870972S1 (en) 2014-04-18 2019-12-24 Koninklijke Philips N.V. Blade for hair cutting appliance

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8806757B2 (en) * 2010-04-30 2014-08-19 Wahl Clipper Corporation Arched hair clipper blade guide
US8931178B2 (en) 2011-02-24 2015-01-13 Albert Beam Clipper deflector for deflecting air and cuttings away from operator
EP2747958B1 (en) * 2011-11-17 2016-09-07 Koninklijke Philips N.V. Skin guard for hair trimmer
WO2014095101A1 (en) * 2012-12-20 2014-06-26 Koninklijke Philips N.V. Cutting assembly for a hair clipping device
EP3003654B1 (en) * 2013-05-30 2017-10-11 Koninklijke Philips N.V. Stationary cutting blade for a hair clipping device
US10441307B2 (en) 2013-09-09 2019-10-15 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
US9918539B2 (en) * 2013-09-09 2018-03-20 Dd Karma Llc Hand held dermaplaning device and dermaplaning process
CN105705104A (en) 2013-09-09 2016-06-22 迪迪卡玛有限责任公司 Hand held dermaplaning device and dermaplaning process
CN104128936B (en) * 2014-07-09 2016-10-05 浙江百特电器有限公司 A kind of magnetic-type bit mechanism and apply the hair scissors of this mechanism
USD751759S1 (en) * 2014-08-08 2016-03-15 Wahl Clipper Corporation Hair cutting device housing
WO2016041796A1 (en) * 2014-09-18 2016-03-24 Koninklijke Philips N.V. Blade set, cutting appliance, and related manufacturing method
JP6517369B2 (en) * 2015-05-21 2019-05-22 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． Improved cutting unit and shaving head of a shaving apparatus
USD808078S1 (en) * 2015-11-26 2018-01-16 Koninklijke Philips N.V. Beard trimmer
CN106108801A (en) * 2016-01-26 2016-11-16 湖北泽森智能科技有限公司 Middle sweeping device cut a mao driving means
US10272578B2 (en) * 2016-08-29 2019-04-30 Wahl Clipper Corporation Hair clipper bladeset with blade guide
JP7111620B2 (en) * 2016-10-28 2022-08-02 デンカ株式会社 Method for producing continuous alumina fiber sheet and continuous alumina fiber sheet
USD853646S1 (en) * 2017-06-13 2019-07-09 Koninklijke Philips N.V. Hair trimmer
USD853648S1 (en) * 2017-06-13 2019-07-09 Koninklijke Philips N.V. Hair trimmer
ZAA201701978S (en) * 2017-06-13 2019-05-29 Koninklijke Philips Nv Grooming apparatus
USD867663S1 (en) * 2017-06-13 2019-11-19 Koninklijke Philips N.V. Hair trimmer
USD849326S1 (en) * 2018-01-15 2019-05-21 Wahl Clipper Corporation Hair trimmer
WO2020037124A1 (en) * 2018-08-17 2020-02-20 Andis Company Adjustable blade assembly having magnetic tensioning
CN110575097A (en) * 2019-09-30 2019-12-17 苏州知一得智能技术有限公司 A cutting device for rolling brush windings and a dust collection device using the same
USD917797S1 (en) * 2020-02-07 2021-04-27 Heiniger Ag Clipper for animals
WO2021252731A1 (en) 2020-06-11 2021-12-16 Andis Company Hair clipper with linear actuator
US11833701B2 (en) * 2021-04-30 2023-12-05 Fiskars Finland Oy Ab Blade receiver assembly and cutting device
WO2022260869A1 (en) * 2021-06-11 2022-12-15 Wahl Clipper Corporation Hair clipper bladeset with combined drive elements
WO2022266466A2 (en) * 2021-06-17 2022-12-22 Sincerely Ltd. B.V. Personal care devices and components
US11731297B2 (en) * 2021-06-17 2023-08-22 Sincerely Ltd. B.V. Personal care devices and components
CN216543420U (en) * 2022-01-11 2022-05-17 宁波市吉贝倍科技有限公司 Magnetic suction suspension type shaver tool bit structure
US20240109210A1 (en) * 2022-09-29 2024-04-04 Andis Company Adjustable Blade Assembly Having Magnetic Tensioning
CN117001722B (en) * 2023-08-11 2026-01-09 东莞凤铭科技交流有限公司 A magnetic silent electric clipper
US20250360636A1 (en) * 2024-05-21 2025-11-27 Andis Company Adjustable Blade Assembly Having Magnetic Tensioning
US20250381686A1 (en) * 2024-06-17 2025-12-18 Andis Company Magnetic Mounting Assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2130832A6 (en) * 1971-03-22 1972-11-10 Bour Armand Le
WO2005075160A1 (en) * 2004-02-09 2005-08-18 Tae-Jun Oh Haircutting blade with oilless metal piece
WO2006000935A1 (en) * 2004-06-21 2006-01-05 Koninklijke Philips Electronics N.V. Hair cutting apparatus

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1351155A (en) * 1971-07-27 1974-04-24 Gillette Co Electric shavers
AT327735B (en) * 1973-02-16 1976-02-10 Braun Ag DRY SHAVER
US4159566A (en) * 1976-04-05 1979-07-03 Patrin Raymond A Electric razorcomb
JPS581950B2 (en) * 1977-05-26 1983-01-13 松下電工株式会社 Cutter blade lifting device
JPS5849747Y2 (en) * 1978-07-25 1983-11-12 日立マクセル株式会社 Scraping device
NL8400887A (en) * 1984-03-21 1985-10-16 Philips Nv SHAVER.
US4709475A (en) * 1986-09-11 1987-12-01 Phung Ha T Combination comb, hair trimmer and safety razor
DE3726434C1 (en) * 1987-08-08 1988-12-08 Pietro Poggetti scissors
JPH01300979A (en) * 1988-05-30 1989-12-05 Tokyo Electric Co Ltd Electric shaver
DE3830934A1 (en) * 1988-09-12 1990-03-22 Pietro Poggetti A pair of scissors, in particular hair-cutting scissors for hairdressers
JPH04112375U (en) * 1991-03-13 1992-09-30 九州日立マクセル株式会社 sliding blade device
JPH0631659U (en) * 1992-09-30 1994-04-26 東京電気株式会社 Electric razor
DE4334794A1 (en) * 1993-10-13 1995-04-20 Georg Dr Mahal Scissors with a magnetic region of movement
WO1995026261A1 (en) * 1994-03-28 1995-10-05 Matsushita Electric Works, Ltd. Reciprocatory dry shaver
JP2878208B2 (en) * 1996-10-03 1999-04-05 株式会社シゲル工業 Barber shears
CN1081517C (en) * 1997-04-24 2002-03-27 皇家菲利浦电子有限公司 Hair-cutting apparatus having toothed cutting device, and toothed cutting device for hair-cutting apparatus
JPH11128566A (en) * 1997-10-28 1999-05-18 Matsushita Electric Works Ltd Reciprocating electric razor
US6226870B1 (en) * 1998-09-08 2001-05-08 Benjamin J. Barish Electrical shaver and auxiliary device particularly useful therewith
AU765077B2 (en) * 1998-12-29 2003-09-11 Kim Laube Disposable cutting head for clippers
JP3386424B2 (en) * 1999-12-21 2003-03-17 株式会社シゲル工業 Barber shears
JP4099999B2 (en) * 2002-01-30 2008-06-11 松下電工株式会社 Hair cutter
US6933630B2 (en) * 2002-06-06 2005-08-23 Braun Gmbh Drive mechanisms for small electric appliances
JP2005185067A (en) * 2003-12-22 2005-07-07 Matsushita Electric Works Ltd Vibration-type linear actuator and hair cutter provided with the same
US20050217118A1 (en) * 2004-04-01 2005-10-06 Mah Pat Y Magnet based angular force control
US20050223565A1 (en) * 2004-04-08 2005-10-13 Rutovic Judith A Jagged edged hairdressing scissors
CN2724944Y (en) * 2004-09-10 2005-09-14 正鹶精密实业有限公司 Hair scissor head with improved structure
JP4773132B2 (en) * 2005-04-20 2011-09-14 有限会社シザーズジャパン scissors
KR200416300Y1 (en) * 2006-02-21 2006-05-12 오태준 Hanal exercise hair clippers
ATE457215T1 (en) * 2006-05-01 2010-02-15 Koninkl Philips Electronics Nv CUTTER AND HAIR CUTTER
JP5820097B2 (en) * 2006-06-19 2015-11-24 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． Hair clipping device
US20090019706A1 (en) * 2007-07-12 2009-01-22 Werner Edwin A Comb attachment
US20090044411A1 (en) * 2007-07-17 2009-02-19 Nancy Cotant Shears with Detachable Comb and Attachment Mechanism
DE102008031132A1 (en) * 2008-07-01 2010-01-07 Braun Gmbh Small electrical appliance for removing hair

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2130832A6 (en) * 1971-03-22 1972-11-10 Bour Armand Le
WO2005075160A1 (en) * 2004-02-09 2005-08-18 Tae-Jun Oh Haircutting blade with oilless metal piece
WO2006000935A1 (en) * 2004-06-21 2006-01-05 Koninklijke Philips Electronics N.V. Hair cutting apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8132332B2 (en) * 2006-05-01 2012-03-13 Koninklijke Philips Electronics N.V. Cutting device
EP1974875A1 (en) 2007-03-30 2008-10-01 WAHL GmbH Cutting unit for an electric hair cutting machine and electric hair cutting machine
DE102007015805A1 (en) * 2007-03-30 2008-10-02 Wahl Gmbh Cutting set for electric hair clippers
DE102007015805B4 (en) * 2007-03-30 2008-11-13 Wahl Gmbh Cutting set for electric hair clippers
US10124498B2 (en) 2014-04-18 2018-11-13 Koninklijke Philips N.V. Blade set, hair cutting appliance, and related manufacturing method
USD870972S1 (en) 2014-04-18 2019-12-24 Koninklijke Philips N.V. Blade for hair cutting appliance
US10751891B2 (en) 2014-04-18 2020-08-25 Koninklijke Philips N.V. Blade set, hair cutting appliance, and related manufacturing method
US11279052B2 (en) 2014-04-18 2022-03-22 Koninklijke Philips N.V. Blade set, hair cutting appliance, and related manufacturing method
US12145284B2 (en) 2014-04-18 2024-11-19 Koninklijke Philips N.V. Blade set, hair cutting appliance, and related manufacturing method

Also Published As

Publication number Publication date
CN101432104A (en) 2009-05-13
CN101432104B (en) 2010-10-13
US8132332B2 (en) 2012-03-13
JP5174808B2 (en) 2013-04-03
JP2009535143A (en) 2009-10-01
EP2015904A1 (en) 2009-01-21
ATE457215T1 (en) 2010-02-15
EP2015904B1 (en) 2010-02-10
DE602007004723D1 (en) 2010-03-25
US20090199413A1 (en) 2009-08-13

Similar Documents

Publication Publication Date Title
EP2015904B1 (en) Cutting device and hair-cutting apparatus
EP3907046B1 (en) Electric beard trimmer
JP5085540B2 (en) Integrated wet shaving and trimming means
CN101600545B (en) hair removal device
EP2170566B1 (en) Grooming tool assembly
EP1744859B1 (en) Wet razor and electric trimmer assembly
AU2008270799B2 (en) Grooming tool
RU2700884C2 (en) Cutting head and device for hair cutting
EP2180983B1 (en) Personal care apparatus
US7748123B2 (en) Electric hair cutting appliance with counter weight
US20110099816A1 (en) Electric trimmer with flip cover
WO2005063077A1 (en) A shearing device including ridges
EP2465652B1 (en) Hair cutter
RU2508981C2 (en) Electrically driven combination hygienic care device
US20050055834A1 (en) Electric hair trimmer
EP1758715B1 (en) Clipping device and comb unit
JP5879531B2 (en) Electric razor
ATE387995T1 (en) ELECTRIC SHAVER
KR200263250Y1 (en) Scissors Combed Hair Cut
HK1100075B (en) Wet razor and electric trimmer assembly

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07735668

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2007735668

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 12298920

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 2009508583

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 200780015690.6

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 6504/CHENP/2008

Country of ref document: IN