JPH03224589A - Rotary type electric razor - Google Patents

Abstract

PURPOSE:To improve the detection accuracy of the number of revolution of a motor by regulating the position by using a guide with respect to the vertical motion of an inner blade driving unit in the case of incorporating a motor revolution number detecting means by a photosensor. CONSTITUTION:A rotating body 63 to be detected is installed in an output shaft of a motor 21, and also, a photosensor 64 is attached so as to be opposed to the rotating body 63 to be detected, and the number of revolution of the motor is detected. Also, between the peripheral surface of the motor 21 and the inside surface of a main body case 1, a vertical motion guide means 33 for regulating the movement of an inner blade driving unit 15 is provided inhibiting the movement of the unit in the forward and backward and the left and right directions. So the unit 15 is regulated so as to move straight in only the vertical direction without inclining forward and backward or to the left and right. Accordingly, the distance of an opposed interval of the rotating body 63 to be detected and the photosensor 64, and an opposed position and an opposed angle to the center shaft of the rotating body 63 to be detected can always be held constant. In such a way, an erroneous detection of the number of revolution of the motor is prevented.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rotary electric shaver.

[Conventional technology]

As a rotary electric shaver, for example, a rotary inner cutter, a motor, and a drive transmission means for transmitting the motor output to the rotary inner cutter are integrally assembled into an inner cutter drive chassis to constitute an inner cutter drive unit, and the inner cutter is There is a device in which the drive unit is always pushed up by a leaf spring inside the main body case to bring the inner cutter into close contact with the inner surface of the outer cutter (document unknown).

In addition, in a reciprocating electric shaver, for example, as shown in Japanese Patent Laid-Open No. 61-62381, the number of rotations of the drive motor is constantly detected, and the speed of the motor is determined regardless of changes in the load. There is a device that maintains a constant state so that shaving can always be performed in the optimum condition.

Furthermore, as a means for detecting the rotational speed of the motor of an electric shaver, a non-contact reflective photosensor is used, for example, as shown in Japanese Utility Model Application Publication No. 10880/1983, and a reflective mark is placed on the output shaft of the motor. There is one that detects the rotational speed of a motor based on a pulsed output from a photo sensor.

[Problem to be solved by the invention]

Here, the problem is when a rotary electric shaver is equipped with a non-contact type rotation speed sensor that detects from the motor output shaft. In this case, in order to eliminate the detection error, the inner cutter drive unit is required to move straight in the vertical direction. That is, if the motor output shaft is tilted due to the vertical movement of the inner blade drive unit, a positional deviation occurs in the facing interval or the facing position with respect to the photosensor, resulting in a detection error.

However, in the above-mentioned rotary electric shaver, the inner blade drive unit is always installed in the main body case in a pushed-up state, but the inner blade drive unit is simply supported within the main body case by a leaf spring. Therefore, there is a lack of stability in regulating the position in the front and back and left and right directions, and when the outer blade is pressed against the skin and released, the motor is held by changes in the position and force of the push. The inner blade drive unit is tilted and floats up and down. For this reason, the rotational body to be detected is misaligned with respect to the photosensor, which tends to cause an error in the detection of the rotational speed of the motor by the photosensor.

The present invention has been made to solve these problems, and is applicable when a motor rotation speed detection means using a photosensor is incorporated into a rotary electric shaver having an inner blade drive unit that is movable up and down as described above. By devising the guide structure of the inner blade drive unit,
The purpose is to improve the detection accuracy of motor rotation speed.

[Means to solve the problem]

As shown in FIG. 1(al(b)), the present invention provides an arch-shaped outer blade 7 detachably attached to the upper side of the main body case 1.
The present invention is based on a rotary electric shaver having an inner blade drive unit 15 supported vertically movably with respect to the main body case 1, and a motor rotation speed detecting means 32 provided within the main body case 1.

The inner cutter drive unit 15 includes a rotary inner cutter 19 that rotates in sliding contact with the inner surface of the outer cutter 7, an inner cutter drive chassis 16 that rotatably supports the rotary inner cutter 19, and is mounted on the inner cutter drive chassis 16. It is formed by integrally combining a motor 21 and a drive transmission means 22 for transmitting the output of the motor 21 to the rotary inner cutter 19.

The motor rotation speed detecting means 32 includes a rotating body 63 to be detected mounted on the output shaft of the motor 21 and a photosensor 64 arranged opposite to the rotating body 63 to be detected.

Between the circumferential surface of the motor 21 and the inner surface of the main body case l, there is provided a lower movement guide means 33 for restricting movement of the inner blade drive unit 15 in directions other than the vertical direction, that is, movement in the front and back and left and right directions. It is equipped with the following.

[Effect]

In such a case, even if depressurization is applied to the outer cutter 7 entirely or locally, the inner cutter drive unit 15 will not tilt forward or backward or left or right due to the position regulation by the vertical movement guide means 33. Move straight up and down only. Therefore, even though the inner blade drive unit 15 moves up and down, the distance of the facing interval between the rotating body 63 to be detected on the output shaft of the motor 21 on the unit 15 and the photo sensor 64, and the rotation to be detected. The opposing position and opposing angle with respect to the central axis of the body 63 can always be kept constant, and erroneous detection of the motor rotation speed can be prevented.

〔Effect of the invention〕

According to the rotary electric shaver of the present invention, the vertical movement guide means 33 allows the inner blade drive unit 15 to move straight only in the vertical direction, and restricts its movement in the front and back and left and right directions, so that the motor rotation speed can be detected. The rotation speed of the motor 21 can be accurately detected by the means 32. Furthermore, the vertical movement guide means 33 utilizes the motor 21, which is one of the constituent members of the inner blade drive unit 15, and guides the flat, flat motor 21 without any unevenness. Since the motor 21 and the inner blade drive chassis 16 are integrated, the vertical movement of the rotary inner blade 19 can be reliably and stably guided, resulting in good cutting quality. It is advantageous.

〔Example〕

A first embodiment of the rotary electric shaver according to the present invention
This will be explained based on FIGS. 21 to 21.

In Figures 2 to 4, the main body case 1 of this
The front and rear cases 1a and 1b are butted against each other and integrally connected with screws 2 or the like. A pair of front and rear circuit boards 3 and 4 are installed in the lower half of the main body case 1, with two rechargeable batteries 5 such as nickel-cadmium batteries arranged between the side boards 3 and 4. A charging plug unit 6 is attached.

In FIGS. 3, 6, and 8, a mesh-shaped outer cutter 7 is attached to the upper part of the main body case 1 via a holder 8 thereof, which is curved into an arch shape. The outer blade holder 8
As shown in FIG. 6, it consists of an inner holder 8a and an outer holder 8b that is separably stacked on the outside of the inner holder 8a.
is sandwiched between the mating surfaces of the inner and outer holders 8a and 8b.

As shown in FIG. 8, the fixed rear end 7b of the outer cutter 7 is caulked and welded to the rear wall of the inner holder 8a, and the movable front end 7a of the outer cutter 7 is attached to the front wall of the inner holder 8a. The outer cutter 7 is connected to a support plate 9 via a zigzag-shaped spring 1o, so that the outer cutter 7 is always pulled toward the movable front end 7a. At this time, in order to suppress the sliding resistance of the outer cutter 7 with the rotary inner cutter 19 as much as possible and to reduce the longitudinal width of the outer cutter holder 8, as shown in FIG. In order to reduce the wrapping angle around the rotary inner cutter 19, the movable front end 7a of the outer cutter 7 is stretched along the downward wavy tapered portion 13 formed on the front surface of the inner holder 8a, and the support plate 9 is The tapered portion 13 is provided on the front surface of the inner holder 8a.
It is fixed by caulking and welding to a straight part 14 that is continuously formed vertically below. The upper and lower ends 10a and 10b of the 1° zigzag spring are rotatably connected to the movable front end 7a of the outer cutter 7 and the support plate 9, respectively.

Therefore, when the outer cutter 7 is pressed against the skin, the outer cutter 7 compresses and deforms the spring 10 and moves downward, and when the outer cutter 7 is removed from the skin, the spring 10 expands and the outer cutter 7 moves upward due to the restoring force. Return. At this time, the outer cutter 7 places the movable piece 34 integrally connected to the front end 7a of the movable side on the front surface of the inner holder 8a in a shape that is slightly sunken below the tapered part 13 and in the shape of the tapered part 13. By sliding the guide groove 13a in the vertical direction along the guide groove 13a formed in parallel with the guide groove 13, the guide groove 13a is guided straightly and smoothly in the vertical direction. In addition, when the outer cutter 7 moves up and down, the spring 10
are rotatably connected to the movable front end 7a of the outer cutter 7 and the support plate 9, respectively, so that the difference in angle between the tapered part 13 and the straight part 14 on the front surface of the inner holder 8a is absorbed, and the outer cutter 7
The front end 7a of the movable side appropriately contracts and expands to move up and down smoothly on the tapered portion 13.

The left and right wall portions of the inner holder 8a are engaged with and held by locking pawls 12 with knobs attached to the left and right upper ends of the main body case 1 via springs 11, respectively, so as to be retractable.

Therefore, in FIG. 3, the left and right locking claws with knobs 1
2 against the spring 11, the outer cutter 7 can be removed from the main case 1 together with the outer cutter holder 8. In FIG. 6, reference numeral 116 indicates a protective camp for covering the outer blade holder 8 when not in use.

An inner blade drive unit 15 is incorporated into the main body case 1. As shown in FIG. 5, the inner blade drive unit 15 includes an inner blade drive chassis 16, an inner blade unit 20, and a motor 2.
1 and a drive transmission means 22 are integrally combined.

As shown in FIGS. 3 and 7, the inner blade drive chassis 1
6 is formed into a U-shape as a whole when viewed from the front, and has left and right chassis 16a and 16b and a bottom chassis 16c, and the upper ends of each of the left and right chassis 16a and 16b protrude upward from the slit 18 in the upper wall 17 of the main case 1. So that the main case 1
be incorporated within. The gaps between the left and right chassis 16a, 16b and each slit 1B are closed with hair intrusion prevention rubber 117.

The inner cutter unit 20 has a rotary inner cutter 19 having a spiral cutting edge.
The upper end portions of left and right chassis 16a and 16b protruding from the chassis are horizontally supported in a removable manner.

The motor 21 and a gear transmission type drive transmission means 22 for transmitting the rotation of the motor 21 to the rotary inner cutter 19 are mounted on the inner cutter drive chassis 16.

A motor holder 23 is superimposed on the bottom chassis 16c of the inner blade drive chassis 16 and integrally connected with screws 24. This motor holder 23 has output shafts 25 and 2 above and below it.
A double-shaft type motor 21 having a screw shaft 6 is held in a vertical position so as to be collinear with the screws 24.

In FIG. 3, the drive transmission means 22 fixes an output gear 27 to an upper output shaft 25 that protrudes from the upper end of the motor 21 upwardly from the motor holder 23 and the bottom chassis 16c, and connects the left and right chassis 16a above the bottom chassis 16c. A driving shaft 28 is rotatably supported between the driving shafts 16b, a gear 29 fixed to the axial center of the driving shaft 28 meshes orthogonally with the output gear 27, and a gear fixed to the right end of the driving shaft 28 3
0 is meshed with a multistage gear 31 housed in the right chassis 16b.

In FIGS. 3 and 7, the left and right chassis 16a-1
Inner blade unit y detachably attached between the upper ends of 6b)
20 integrates a cylinder-shaped rotary inner cutter 19, a shaft 35 protruding from both left and right ends of the rotary inner cutter 19, and an inner cutter holder 37 that rotatably supports the shaft 35 on the right end side via a bearing 36. It is a combination of The inner blade holder 3
7 is an open-bottom housing 38 that accommodates the bearing 36;
and a connecting frame 39 that protrudes horizontally from the lower part of the housing 38 to the left side, and the shaft 35 is disposed within the housing 38.
A gear 40a fixed to the upper part and a gear 40b meshing with the gear 40b are assembled into two upper and lower gears, and the lower circumferential surface of the lower gear 40b is removably engaged with the uppermost gear of the multi-stage gear 31 of the drive transmission means 22. It faces the open bottom of the housing 38 so that the housing 38 has an opening.

7 and 9, regarding the structure for attaching and detaching the inner cutter unit 20 to the upper end of the inner cutter drive chassis 16, the upper end side of the right chassis 16b is provided with a housing holder that receives and supports the housing 38 of the inner cutter unit 20. Part 41
will be established. A bearing 42 that supports the left shaft 35 of the rotary inner cutter 19 in a removable manner is provided on the upper end side of the left chassis 16a.
The housing 43 that accommodates the
1 and is integrally extended and formed to be higher than 1.

Further, as shown in FIG. 9, a connecting hole 44 is formed in the lower part of the housing 43 of the left chassis 16a, into which the tip 39a of the connecting frame 39 of the inner blade holder 37 is inserted and supported in a removable manner. Further, the left chassis 16a is provided with a locking means for locking the leading end 39a of the connecting frame 39 from coming out of the connecting hole 44. The locking means includes an inner blade release button 45 mounted on the outside of the left chassis 16a so as to be slidable up and down. On the inner surface of the inner blade release button 45, a lock pawl 46 that can be freely engaged and disengaged from the inside of the tip 39a of the connecting frame 39 is integrally provided. The inner cutter release button 45 is always urged upward by a spring 47, and maintains an engaged state in which the lock pawl 46 engages the tip 39a of the connecting frame 39 from below.

As shown in FIG. 7, a guide frame 48 is integrally extended between the upper ends of the left and right chassis 16a and 16b in a horizontal state, and guide grooves 49 are provided at the front and rear of the inner surface of the guide frame 48, respectively. It is provided in accordance with the height position of the hole 44. By inserting the tip 39a of the connecting frame 39 into this guide groove 49 from the right end side and sliding the entire inner cutter unit 20 horizontally to the left, the tip 39a of the connecting frame 39
9a is inserted into the connecting hole 44.

In this way, the inner blade unit 20 is mounted on the left and right chassis 16a.
6b, the inner blade unit 20 is
Slide the connecting frame 39 into the guide groove 49 from the right chassis 16b toward the left chassis 16a, insert the left shaft 35 into the bearing 42 as shown by the two-dot chain line in FIG. The tip end 39a of is inserted into the connecting hole 44. When the tip 39a of the connecting frame 39 is inserted into the connecting hole 44, the tip 39a comes into contact with the taper of the lock claw 46 of the inner blade removal button 45, and the button 45 is once pushed down against the spring 47, and the tip 39a is inserted into the connecting hole 44. When the button 45 passes over the lock pawl 46, the button 45 is automatically moved upward by the spring 47 and the lock pawl 4 is moved upwardly by the spring 47.
6 is plunged into engagement with the inside of the tip 39a of the connecting frame 39 and locked. In addition, as shown in FIG. 3, the inner cutter unit 20
The housing 38 of the right chassis 16b fits onto the housing receptacle 41, so that the gear 40b in the housing 38 meshes with the gear 31 of the drive transmission means 22. In this installed state of the inner cutter unit 20, the connecting frame 39 is inserted and supported in the connecting hole 44, and the locking claw 46
By locking the extraction in a stopper-like manner, a state is obtained in which vertical, longitudinal, and horizontal movements of the inner cutter unit 20 are regulated.

At this time, since the inner cutter unit 20 is integrally equipped with the inner cutter holder 37, the inner cutter holder 37, especially the housing 38 part, can be held between the fingers and directly attached to the spiral cutting edge of the rotary inner cutter 19. It can be installed safely without touching it. Further, by sliding the connecting frame 39 onto the guide frame 48, it can be easily attached.

The rotary inner cutter 19 may be cleaned even when it is mounted on the inner cutter drive chassis 16.

In this case, as shown in FIG. 10(a), as a cleaning brush 50, a handle 51 is provided with brush bristles 52 of normal hardness and bristles 53 harder than the normal hard bristles. An arcuate recess 53a along the circumference of the rotary inner cutter 19 is formed in the tip of the bristles 53.

Thus, as shown in FIG. 10 (bl), if the arcuate recess 53a of the hard brush bristles 53 is applied to a part of the circumference of one axial end of the rotary inner cutter 19 and slid toward the other axial end. Since the hard brush bristles 53 slide along the continuous spiral blade groove from one axial end of the rotary inner cutter 19 to the other end, the rotary inner cutter 19 is forced to rotate and scrape off the hair. The handle 51 of the cleaning brush 50 is provided with a finger-slip protrusion 51a to be positioned above the hard brush 53.Therefore, hold the handle 51 with your fingers and insert it into the rotary inner blade as described above. 19
When cleaning by sliding the top, the fingers on the handle 51 are prevented from sliding toward the spiral blade edge by the finger slip prevention protrusion 51a, so the fingers can be cleaned safely without being injured by the spiral blade edge. .

When removing the rotary inner blade 19 for cleaning or replacing it with a new one, place the outer blade 7 in the holder 8.
When the inner cutter release button 45 is pulled down against the spring 47 after removing it from the upper part of the main body case 1, the lock claw 46 is pulled out downward from inside the tip 39a of the connecting frame 39, and the entire inner cutter unit 20 is removed. By sliding the inner cutter unit 20 to the right, the inner cutter unit 20 can be removed from the inner cutter drive chassis 16.

3 and 7, the inner blade drive chassis 16 has front and rear support arms 54, 54 which are elastically deformable only in the vertical direction from the left and right ends of the plastic motor holder 23.
are integrally protruded horizontally in the left-right direction, and the tips 54a of each support arm 54 are engaged and fixed in a recess 55 provided on the inner wall of the main body case 1, so that the entire inner blade drive unit 15 can be attached to the left and right support arms 54. It is supported so that it can move up and down through elastic deformation. A spring receiver 56 is fixed to the bottom side of the inner blade drive chassis 16 and to the main body case 1 side so as to correspond to the bottom side of the inner blade drive chassis 16.
A compression spring 57 is interposed between the rotary inner cutter 19 and the inner cutter 19 so that the upper circumference of the rotary inner cutter 19 is always aligned with the outer cutter. I try to stay close to the inner world of 7.

In FIGS. 3 and 4, a vertical movement guide means 33 is provided between the motor 21 and the inner surface of the main body case 1 to restrict movement of the inner blade drive unit throat 15 in the front-back and left-right directions. As the vertical movement guide means 33, longitudinal position regulating ribs 58 are integrally provided to protrude from each inner surface of the front and rear cases 1a and 1b, and the motor 21 is guided between the front and rear longitudinal position regulating ribs 58, 58 to guide the inner blade. The movement of the entire drive unit 15 in the front-back direction is restricted. Further, by forming a vertically long circular recess 60 on the inner surface of the rear case 1b, and protruding a pin 61 from the motor holder 23, the pin 61 is fitted into the recess 60 so as to be slidable only in the vertical direction. , it also ensures that the movement of the inner blade drive unit 15 in the left and right direction is restricted.

1A and 4, within the main body case 1, a means 32 for detecting the rotational speed of the motor 21 from the lower output shaft 26 is provided at the lower part of the motor 21. As shown in FIG. The rotation speed detecting means 32 includes a roll-shaped rotating body 63 to be detected having reflective marks 62 attached at a constant pitch in the circumferential direction on the lower output shaft 26 of the motor 21, and a receiving/emitting element facing the rotating body 63. A reflective photosensor 64, in which both are placed side by side in the same direction, is arranged on the circuit board 3 or 4.

As shown in FIG. 1(a), the photosensor 64 irradiates the circumferential surface of the rotating body 63 to be detected with light emitted from a light emitting element, receives and senses the reflected light with a light receiving element, and detects the rotational speed of the motor 21. A detection signal 65 with a pulse rate proportional to is extracted. A detection signal 65 taken out from this rotation speed detection means 32 is input to a rotation speed control circuit 66 of the motor 21. The control circuit 66 compares the value of the pulse-like detection signal 65 taken out from the photosensor 64 with the value of the reference signal 67, and applies a drive voltage 68 corresponding to the difference between the two to the motor 21. Always maintain a constant rotational speed.

In addition to being used to control the rotation of the motor 21, the detection signal 65 output from the rotation speed detection means 32 is used to control the rotation of the motor 21 due to consumption of the rechargeable battery 5 in the rechargeable electric shaver.
It can also be used to notify the necessity of charging using an indicator lamp or the like when the rotational speed of the battery 1 decreases.

As described above, the movement of the inner blade drive unit 15 in the longitudinal and horizontal directions is restricted by the vertical movement guide means 33, so the distance between the photosensor 64 and the rotating body 63 to be detected, and the Detection rotating body 63
The facing position and facing angle with respect to the central axis are always kept constant. Therefore, the light reflected from the rotating body 63 to be detected can always be reliably detected by the light receiving element of the photosensor 64, and no detection error occurs.

In FIG. 4, a switch case 69 is mounted on the outer surface of the front case 1a so as to be slidable in the vertical direction. A fixed comb blade 70 and a movable comb blade 71 for edge shaving are provided at the upper part of the inner surface of the switch case 69 so that each cutting edge protrudes upward, and a movable comb blade 71 is provided that receives the motor output. The switch case 69 is integrally connected to a moderation plate 73 (see FIG. 5) disposed on the inner surface of the front case la.

The moderation plate 73 includes a switch plate spring 74 that comes into contact with and separates from the switch terminal on the circuit board 3 as the switch case 69 slides up and down, and a moderation protrusion 5 that protrudes from the inner surface of the front case 1a.
It has a moderation arm 75 that can be freely engaged with and detached from 9. As shown in FIG. The longitudinal movement regulating rib 58 and the moderating protrusion 5
It has a structure that also serves as 9. However, the moderating projection 59 may be provided separately from the longitudinal movement regulating rib 58.

In this way, the switch case 69 moves the moderation arm 75 into engagement with the moderation protrusion 59 in a step-by-step manner, thereby moving the switch case 69 to the lower standby position (switch off position) shown in solid line in FIG. position (switch-on position), and one step higher, the crease shaving drive piece 72 engages with the crease shaving drive arm 76 on the upper output shaft 25 of the motor 21, and the driving force is transmitted to the movable comb blade 71. , a first upwardly protruding use position where the movable comb blades 71 and the fixed comb blades 70 are used together with the rotary inner blade 19 and outer blade 7 for shaving; The movable comb blades 71 and the fixed comb blades 70) are respectively positioned and held at the second upward protruding use position. In FIG. 4, the movement stroke of the switch case 69 from the lower standby position to the motor starting position is indicated by the symbol SL, and the movement stroke from the motor starting position to the first upward protruding use position is indicated by the symbol S2, 2nd from the protruding use position
The movement stroke to the upwardly protruding use position is indicated by the symbol S3.

4 and 5, the switch case 69 has a lock button 77 protruding from a hole 78 in the switch case 69 for holding the switch case 69 in a lower standby position and preventing accidental upward movement. The lower standby position of the switch case 69 is held by a lock claw 79 protruding from a moderation plate 73 as shown in FIG. When the button 77 is pressed, the lock pawl 79 comes off the retaining portion on the inner surface of the front case 1a, allowing the switch case 69 to slide upward.

In FIGS. 4, 11 to 14, below the rotary inner cutter 19 of the main body case 1, a hair waste storage chamber 80 is formed to collect the hair falling from the inner cutter 19. 12th
As shown in the figure, the lint storage chamber 80 is formed in the shape of a slide consisting of a straight line part 80b that slopes downward from the inner bottom surface 80a and a circular arc part 80c that is continuously formed below the straight part 80b. A discharge port 81 is formed at the lower end side of the rear case 1b so as to face the upper outer side of the rear case 1b. A shutter 82 is attached to the discharge port 81 of the hair collection chamber 80 around a shaft 83 between the closed position of the discharge port 81 (see FIG. 12) and the open position of the discharge port 81 protruding outward (see FIG. 13). Approximately 90
Pivotally mounted for free rotation. The shutter 82 is interlocked and connected to an opening/closing lever 84 provided on one side of the main body case 1 so as to be slidable up and down by a predetermined stroke, and when the lever 84 is slid, the shutter 82 is rotated to open and close around a shaft 83 . In addition, a scraping blade 85 is pivoted in the interior of the hair collection chamber 80 so as to be rotatable approximately 124 degrees around a shaft 86 between a standby position (see Fig. 12) and a scraping end position (see Fig. 13). be done. Note that the shaft 83 and the shaft 86 are on the same axis. As shown in FIG. 12, in the standby position of the raking blade 85, the tip 85a of the blade 85 is connected to the lint trap so that the hair that will fall from the rotary inner cutter 19 will smoothly and reliably flow into the trap 80 while the rotary inner cutter 19 continues to rotate. A hair waste inflow opening 87 is formed between the inner bottom surface 80a of the chamber 80 and the linear portion 80b so as to substantially coincide with the downward tangential direction of the inner cutter circumference.

Then, when the scraping blade 85 rotates from the standby position toward the discharge port, the tip 85a of the scraping blade 85 rotates toward the arcuate portion 80b of the inner court surface 80a.
The tip 85 gradually approaches the
When a rotates along the arc portion 80b to the drawing end position, the hair on the inner bottom surface 80a is scraped out from the outlet 81. The scraping blade 85 rotates in conjunction with the opening operation of the shutter 82 in the rotation range from the standby position until the tip 85a approaches the inner bottom surface 80a, and thereafter rotates in the direction of the discharge port. This is done automatically using the restoring force of the spring 88. To that end, the 11th
As shown in FIG. 119 and FIG. 14, a torsion coil spring 88 is hung between the scraping blade 85 and the main body case 1. When the spring 88 is in the initial wound state, one end 88a thereof is connected to a hole 90 provided in the side wall 89 of the hair lint chamber 80, and the other end 88a is
8b passes through a groove 91 formed in an arc shape centered on the shaft 83 in the side wall 89, and a hole is provided at an intermediate position between the shaft 86 and the tip 85a in the side wall 92 of the scraping blade 85. 93 respectively.

In this case, as shown in FIG. 12, when the shutter 82 closes the discharge port 81 and the scraping blade 85 is in the standby position, the spring 88 expands and rotates the scraping blade 85 upward by the restoring force. The base end 85b of the scraping blade 85 presses against the upper end 82a of the shutter 82 to hold the shutter 82 in a closed state. With the shutter 82 closed and the scraping blade 85 on standby, the hair falling from the rotary inner blade 19 flows into the hair collection chamber 80 through the opening 87 and is collected therein. At this time, in the gap between the circumference of the rotary inner cutter 19 rotating in the direction of arrow P and the front guide frame 48, as shown in FIG. By forming the gap narrowly, it is possible to increase the flow velocity of the hair within the gap, and the hair can smoothly flow into the opening 87. In addition, the scraping blade 85 is in a standby state, and prevents hair from scattering to the outside from the frontage 87 due to the winding up of the air flow shown by the arrow M generated in the hair waste storage chamber 80 as the rotary inner blade 19 rotates. It works like this.

To discharge the hair from the hair collection chamber 80, the opening/closing lever 84 is slid upward to rotate the shutter 82 around the shaft 83 to open upward. Then, the drawing blade 85 is initially pushed by the upper end 82a of the shutter 82 and rotates toward the scraping end position, but at this time, as shown in FIG. When the movable point A, which is the joint part with the side wall 92 of the other end 88a of the spring 88, reaches the dead center on the line l connecting the center of the shaft 86 and the fixed point B, which is the joint part with the side wall 92 of the other end 88a of the spring 88 (the movable point At the position where the distance between point A and fixed point B is the shortest), the spring 88 is most strongly coiled and deformed, and beyond its dead center, the spring 88 changes its attitude,
Due to its spreading restoring force, the scraping blade 85 suddenly moves to its base end 8.
5b is separated from the upper end 82a of the shutter 82 and rapidly rotated to the scraping end position. Therefore, the hair in the hair collection chamber 80 is vigorously scraped out from the discharge port 81 by the tip 85a due to the rapid rotation of the scraping blade 85, and grips the area around the discharge port 81 and the main body case 1. It is properly discharged without getting it on your hands or the like. Since this scraping of hair is performed by directing the discharge port 81 toward a predetermined disposal location such as a waste container, the hair does not scatter around and pollute the surroundings.

As shown in FIG. 13, the scraping blade 85 has an end 92a of its side wall 92 in contact with the inner surface of the shutter 82 at the scraping end position. Therefore, at this time, the shutter 82 is activated by the opening/closing lever 8.
When the scraping blade 85 is rotated closed by the pulling down operation of step 4, the scraping blade 85
is pushed and moved by the inner surface of the shutter 82 and rotated back toward the standby position, and when the spring 88 crosses the dead center at line 1, its expanding restoring force automatically returns the raking blade 85 to the standby position. It will be done.

In FIGS. 3, 4, 15, and 16, the charging plug unit 6 incorporated in the bottom side of the main case 1 is sandwiched and fixed between the front and rear cases 1a and 1b as shown in FIG. Plug board 111 and Plug board 111
A fixed socket 94 is fixed to the bottom side of the board 111 so that power can be supplied via a power cord, and a movable socket 94 for charging is attached to the bottom side of the board 111 so that it can be slid left and right and can be plugged into a wall outlet etc. It is integrally combined with the type plug 95. The fixed socket 94 and the movable plug 95 can be used alternatively.

A plug outlet 9 is provided on one side of the bottom of the front and rear cases 1a and 1b.
6, each has an operating groove 97 opened in its bottom surface.

The plug outlet 96 can be opened and closed by a plug cover 98 mounted above the plug outlet 96 on one side of the front and rear cases 1a and 1b so as to be slidable up and down. The corners of the front and rear cases 1a and 1b on the side where the plug exit/exit port 96 is provided are formed into an oil cross-sectional shape that is rounded in the vertical and longitudinal directions, and the lower end of the plug cover 98 is also formed in the front and rear cases 1a and 1b. It is formed into a rounded shape corresponding to the shape of the corner (see FIGS. 15 and 16). Therefore, even if you grip the main body case l strongly, the corners will not hurt your palm.

In FIGS. 15 and 16, the plug board 11
A plug blade holder 101 having a U-shape in plan view is attached to the lower surface of the plug blade holder 101 so as to be slidable in the left-right direction by a predetermined stroke across both the front and rear sides of the fixed socket 94. The plug blade holder 101 has a plug blade insertion hole 102 at its tip 101a, and hook engagement grooves 103 on its front and rear sides.
3 is slidably engaged with the front and rear hooks 104 protruding downward from the front and rear ends of the plug board 111.

The movable plug 95 has a pair of front and rear plug blades 99 and a blade stand 100 integrally connected to the base end thereof.

The movable plug 95 has a plug blade 99 inserted into the plug blade insertion hole 102 of the plug blade holder 101 so as to straddle both the front and rear sides of the fixed socket 94.

Further, an operation knob 105 is attached to the bottom side of the blade base 100, and this operation knob 105 is slidable in the left and right direction in the operation groove 97 together with the movable plug 95. Recesses 106 provided at the left and right end positions
・It is said that each can be freely engaged and detached from 107.

As shown in FIGS. 15 and 16, the operation knob 105
When the movable plug 95 is engaged with the recess 107 at the right end of the operating groove 97, the movable plug 95 is in a state where the plug blade 99 and the plug blade holder 101 are moved in and out of the plug opening 96.

Now, slide the plug cover 98 upward to open the plug exit/exit port 96, and insert the operation knob 105 into the recess 107 at the right end.
When the hook 104 is disengaged and slid to the left along the operating groove 97, the hook 104 first engages with the hook engagement groove 1.
The plug blade 99 protrudes from the plug blade insertion hole 102 and the plug exit/exit opening 96 until it reaches the right end inside the plug blade 99 . When the operating knob 105 is further slid to the left until it engages with the recess 106 at the left end of the operating groove 97, the plug blade holder 101 is moved through the engagement between the hook 104 and the right end in the hook engaging groove 103. The plug blade 99 is pushed in that direction together with the plug blade 99, and as shown in FIGS. The plug also protrudes from the plug outlet 96. The plug blade holder 1
In the protruding state of 01, the flat tip 101a is set to be in line with the straight part S continuing upward from the rounded part R of the curved cross-section corner of the main body case 1. Therefore, even when the plug blade 99 is made to protrude from the plug outlet 96 at the corner of the curved section during charging, the tip 101a of the plug blade holder 101 is connected to the wall outlet C (the 17th
(See the two-dot chain line in the figure) and can provide a stable and reliable charging posture. Further, when charging is performed using the movable plug 95, the fixed socket 94 is closed by a socket cover 108 that is integrally formed on the bottom side of the blade stand 100. Then, in order to return the movable plug 95 to the plug exit/removal slot 96, the operating knob 105 may be slid within the groove 97 until it engages with the recess 107 at the right end of the operating groove 97. .

In addition, in FIG. 19, a safety switch 109 is arranged inside the rear case 1b. This safety switch 109
In the normal state when the outer blade holder 8 is attached to the main body case 1, the safety piece 110 protruding from a part of the rear case 1b on the inner wall of the holder 8 is kept pressed, and the fixed terminal 109a of the safety switch 109 and the movable terminal 109b contact each other and close the power circuit, but when the outer blade holder 8 is removed, the pressing effect on the safety piece 110 is released, the movable terminal 109b separates from the fixed terminal 109a, and the power circuit opens. There is. Therefore, when the outer cutter holder 8 is removed for cleaning or the like, the rotary inner cutter 19 will not rotate unexpectedly, making it safe.

20 and 21 also show the stand 112. FIG. This stand 112 has recesses 1 for accommodating an electric shaver 113 configured as described above, a power cord 114, a cleaning brush 50, and a case 115 for housing the electric shaver 113 in a leaning position.
16, 117, 118, and 119 are formed.

[Another example]

In the above embodiment, a reflective type photosensor 64 is used as the photosensor 64 of the rotational speed detecting means 32 of the motor 21, but instead of this, as shown in FIG. It is also possible to use a photo ink converter with a similar structure, and to arrange the rotating body 63 to be detected on the output shaft of the motor 21 between the pixel elements. In this case, a gear or a disc with a slit is used as the rotating body 63 to be detected.

Further, in the above embodiment, the rotation speed is detected from the lower output shaft 26 of the motor 21, but it can also be detected from the upper output shaft 25.

[Brief explanation of drawings]

FIG. 1 (al is a side view schematically showing the main parts of a rotary electric shaver according to the present invention, FIG. 1(b) is a front view thereof, and FIGS. 2 to 21 are one embodiment of the present invention. Figure 2 is a perspective view of the whole, Figure 3 is a vertical front view of the whole, Figure 4 is a vertical side view of the whole, Figure 5 is an exploded perspective view of the whole, and Figure 6 is a protective cap. , and an exploded perspective view of the outer cutter holder; FIG. 7 is an exploded perspective view of the inner cutter drive unit; FIG. 8 is a cross-sectional view of the outer cutter holder; and FIG. 9 is a cross-section showing the inner cutter unit being installed. Figure, 10th
Figure (a) is a front view of the cleaning brush, Figure 10 (b) is a perspective view showing how it is used, Figure 11 is a side view of the lint collection chamber, and Figure 12 is the bristle brush shown with the shutter closed. Figure 13 is a cross-sectional view of the hair collection chamber with the shutter open, Figure 14 is an exploded perspective view of the hair removal mechanism, and Figure 15 is with the movable plug retracted. 16 is a sectional view taken along the line X-X in FIG. 15, FIG. 17 is a longitudinal sectional front view of the bottom of the main case showing the movable plug in a protruding state, and FIG. 18 is a longitudinal sectional front view of the bottom of the main case shown in FIG. 17 is a sectional view taken along the Y-Y line in FIG. 17, FIG. 19 is a front view of the safety switch portion, FIG. 20 is a vertical sectional front view of the stand, and FIG. 21 is a sectional view taken along the Z-Z line in FIG. 20. FIG. 22 is a front view of a motor rotation speed detecting means portion showing another embodiment of the present invention. 1...Body case, 7...Outer blade, 15...Inner blade drive unit, 16...Inner blade drive chassis, 19...Rotary inner blade, 21... ... Motor, 22 ... Drive transmission means, 25, 26 ... Output shaft, 32 ... Rotation speed detection means, 33 ... Vertical movement guide means, 63 ... For detected Rotating body, ・Photo sensor. Inventor Yasuo Yamashita Figure 8 Figure 10 (a) Gogome 0 Figure (b) Kou Figure 3 Figure 18 Figure 6 Figure 22 Figure procedure amendment (own ship March 7, 1990)

Claims (1)

[Claims] 1. An arch-shaped outer cutter (7) detachably attached to the upper side of the main body case (1), and an inner cutter drive unit supported so as to be vertically movable with respect to the main body case (1). (15) and a motor rotation speed detection means (32) provided in the main body case (1), the inner blade drive unit (15) is mounted on the inner surface of the outer blade (7). A rotary inner cutter (19) that rotates in sliding contact with the inner cutter, an inner cutter drive chassis (16) that rotatably supports the rotary inner cutter (19), a motor (21) mounted on the inner cutter drive chassis (16), and a drive transmission means (22) for transmitting the output of the motor (21) to the rotary inner cutter (19), and the peripheral surface of the motor (21) and the inner surface of the main body case (1). A vertical movement guide means (33) is provided between the inner blade drive unit (15) to restrict the movement of the inner blade drive unit (15) in the front-back and left-right directions, and a motor rotation speed detection means (32) is connected to the output shaft of the motor (21). A rotating body to be detected (63) is attached, and a photo sensor (64) is mounted opposite to the rotating body to be detected (63).
A rotary electric shaver characterized by the following: