JP3025844B2 - Rotary electric razor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rotary electric shaver.

[Conventional technology]

As a rotary electric shaver, for example, an inner blade drive unit is formed by integrally assembling a rotary inner blade, a motor, and a drive transmission means for transmitting a motor output to the rotary inner blade to an inner blade drive chassis. There is an apparatus in which a drive unit is constantly pushed up by a leaf spring in a main body case so that an inner blade is brought into close contact with an inner surface of an outer blade (document is unknown).

Further, in a reciprocating electric shaver, for example, as disclosed in Japanese Patent Application Laid-Open No. 61-62381, the rotational speed of the drive motor is constantly detected, and the speed of the motor is changed regardless of the light and heavy load fluctuation. There is one that keeps it constant and enables shaving always in an optimal state.

Further, as a means for detecting the number of revolutions of the electric shaver motor, for example, a non-contact type reflective photosensor as shown in Japanese Utility Model Laid-Open No. 62-10880 is used, and a reflection mark is provided on the output shaft of the motor. In some cases, the number of rotations of the motor is detected based on a pulse output from a photosensor.

[Problems to be solved by the invention]

What matters here is the rotary type electric razor,
This is a case where a non-contact type rotation speed sensor for detecting from the motor output shaft is incorporated. In this case, in order to eliminate the detection error, it is required that the inner blade drive unit moves straight in the vertical direction. That is, if the motor output shaft is inclined in accordance with the vertical movement of the inner blade drive unit, a positional error occurs in the facing distance and the facing position with respect to the photosensor, and a detection error occurs.

However, in the above-mentioned rotary electric shaver, when the inner blade drive unit is always installed in the main body case in a biased state, the inner blade drive unit is simply supported by a leaf spring in the main body case. Therefore, the position control in the front-rear and left-right directions lacks stability, and when the outer blade is pressed against or separated from the skin, the inner blade drive unit that holds the motor by changing the pressed position or pressing force. Floats up and down in a tilted state.
For this reason, the detected rotating body is displaced from the photosensor, and a detection error of the rotation speed of the motor by the photosensor is likely to occur.

The present invention has been made in order to solve such a problem, and in the case where a motor type rotational speed detecting means using a photo sensor is incorporated in a rotary electric shaver provided with an inner blade drive unit capable of moving up and down as described above. Another object of the present invention is to improve the detection accuracy of the motor rotation speed by devising the guide structure of the inner blade drive unit.

[Means for solving the problem]

As shown in FIGS. 1 (a) and 1 (b), the present invention provides an arch-shaped outer blade 7 detachably mounted on the upper side of a main body case 1.
And a rotary electric shaver having an inner blade drive unit 15 supported up and down with respect to the main body case 1 and a motor rotation speed detecting means 32 provided in the main body case 1.

The inner blade drive unit 15 is mounted on the rotary inner blade 19 that slides and rotates on the inner surface of the outer blade 7, an inner blade drive chassis 16 that rotatably supports the rotary inner blade 19, and the inner blade drive chassis 16. The motor 21 and the drive transmitting means 22 for transmitting the output of the motor 21 to the rotary inner blade 19 are integrally combined.

The motor rotation number detecting means 32 has a detection rotating body 63 mounted on the output shaft of the motor 21 and a photo sensor 64 provided opposite to the detection rotating body 63.

Then, between the peripheral surface of the motor 21 and the inner surface of the main body case 1, movement of the inner blade drive unit 15 in a direction other than the vertical direction,
That is, it is provided with vertical movement guide means 33 for regulating the movement in the front-rear and left-right directions.

[Action]

In this case, even when the skin pressure is applied to the outer cutter 7 entirely or locally, the inner cutter drive unit 15 is not tilted back and forth or left and right by 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 between the facing rotating body 63 and the photosensor 64 on the output shaft of the motor 21 on the unit 15 and the distance The facing position and the facing angle with respect to the central axis of the body 63 can always be kept constant, and erroneous detection of the motor speed can be prevented.

〔The invention's effect〕

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 up-down direction and restricts the movement in the front-rear and left-right directions. The rotation speed of the motor 21 can be accurately detected by the means 32. Moreover, the vertical movement guide means 33 utilizes the motor 21 which is one of the components of the inner blade drive unit 15 and guides the flat and smooth motor 21 without any irregularities.
Does not hinder the inner blade drive system on the inner blade drive unit 15,
In addition, since the motor 21 and the inner blade drive chassis 16 are integrated, the vertical movement guide of the rotary inner blade 19 can be performed reliably and stably, and the sharpness can be improved, which is advantageous.

〔Example〕

One embodiment of a rotary electric shaver according to the present invention will be described with reference to FIGS.

2 to 4, the main body case 1 is shown.
Are integrally connected by screws 2 and the like by abutting the front and rear cases 1a and 1b. In the lower half of the main body case 1, a pair of front and rear circuit boards 3, 4 are incorporated with two rechargeable batteries 5, such as NiCd, arranged between the two boards 3, 4, and mounted on the bottom of the case. A charging plug unit 6 is mounted.

In FIGS. 3, 6, and 8, the main body case 1
A mesh-shaped outer blade 7 is mounted on the upper part of the upper part thereof so as to be curved in an arch shape via a holder 8 thereof. As shown in FIG. 6, the outer cutter holder 8 is composed of an inner holder 8a and an outer holder 8b superposed so as to be separable on the outer side thereof, and the outer cutter 7 is sandwiched between the mating surfaces of the inner and outer holders 8a and 8b. It is. As shown in FIG. 8, the fixed rear end 7b of the outer cutter 7 is welded to the rear wall of the inner holder 8a by welding, and the movable front end of the outer cutter 7 is fixed.
7a is connected to a support plate 9 attached to the front wall of the inner holder 8a via a zigzag spring 10, so that the outer cutter 7 is constantly pulled toward the movable front end 7a. At this time, the outer blade 7
In order to minimize the sliding resistance of the outer cutter 7 with the rotary inner cutter 19 and to reduce the front-rear width of the outer cutter holder 8, as shown in FIG. In order to reduce the angle, the movable front end 7a of the outer cutter 7 is stretched along the downwardly expanding tapered portion 13 formed on the front surface of the inner holder 8a, and the support plate 9 is mounted on the front surface of the inner holder 8a. It is fixed by caulking and welding to a straight portion 14 formed vertically below the tapered portion 13 continuously. Also,
Upper and lower ends 10a and 10b of the zigzag spring 10 are rotatably connected to the movable front end 7a of the outer blade 7 and the support plate 9, respectively.

Therefore, when the outer blade 7 is pressed against the skin, the outer blade 7 contracts and deforms the spring 10 to move downward. When the outer blade 7 is separated from the skin, the outer blade 7 moves upward due to the expansion restoring force of the spring 10. Return. At this time, the outer cutter 7 attaches the movable piece 34 integrally joined to the movable front end 7a to the tapered portion on the front surface of the inner holder 8a.
By vertically sliding along a guide groove 13a formed in a part of 13 slightly below the tapered portion 13 and parallel to the tapered portion 13, it is guided straight and smoothly in the vertical direction. You. Also, when the outer blade 7 moves up and down,
The spring 10 connects the upper and lower ends 10a and 10b to the movable front end 7a of the outer cutter 7.
And the support plate 9 are rotatably connected to each other, so that the angle difference between the tapered portion 13 on the front surface of the inner holder 8a and the straight portion 14 is absorbed, and the movable-side front end 7a of the outer cutter 7 is on the tapered portion 13. In order to move up and down smoothly, it contracts appropriately and expands and deforms.

The left and right walls of the inner holder 8a are engaged and held by knob engaging claws 12 which are attached to the upper ends on the left and right sides of the main body case 1 via springs 11 so as to be freely retractable. Accordingly, in FIG. 3, when the right and left locking claws 12 with knobs are pushed in against the spring 11, the outer blade 7 can be removed from the main body case 1 together with the outer blade holder 8. Note that in FIG.
Reference numeral 6 denotes a protective cap for covering the outer blade holder 8 when not in use.

An inner blade drive unit 15 is incorporated in the main body case 1. As shown in FIG. 5, the inner blade drive unit 15 integrally combines an inner blade drive chassis 16, an inner blade unit 20, a motor 21, and a drive transmission means 22.

As shown in FIGS. 3 and 7, the inner blade drive chassis
16 is formed in a U-shape in front view,
It has 16a and 16b and bottom chassis 16c, and left and right chassis 16a and 16
b is incorporated in the main body case 1 so that each upper end protrudes upward from the slit 18 of the upper wall 17 of the main body case 1.
The gaps between the left and right chassis 16a and 16b and each slit 18 are closed by a hair intrusion prevention rubber 117.

The inner cutter unit 20 has a rotary inner cutter 19 having a spiral cutting edge, and right and left protruding from the upper wall 17 of the main body case 1 so that the rotary inner cutter 19 rotates in sliding contact with the inner surface of the outer cutter 7. It is detachably horizontally supported between the upper ends of the chassis 16a and 16b.

The motor 21 and a gear transmission type drive transmission means 22 for transmitting the rotation of the motor 21 to the rotary inner blade 19 are mounted on the inner blade drive chassis 16. A motor holder 23 is superimposed on a bottom chassis 16c of the inner blade drive chassis 16 and integrally joined with screws 24. A double-shaft motor 21 having output shafts 25 and 26 above and below the motor holder 23 is held together by screws 24 in a vertical position.

In FIG. 3, the drive transmission means 22 fixes an output gear 27 to an upper output shaft 25 projecting from the upper end of the motor 21 to a position above the motor holder 23 and the bottom chassis 16c.
A driving shaft 28 is rotatably supported between the left and right chassis 16a and 16b above c, and a gear 29 fixed at a central portion in the axial direction of the driving shaft 28 is meshed with the output gear 27 at right angles to the driving shaft. A gear 30 fixed to the right end of the gear 28 meshes with a multi-stage gear 31 housed in the right chassis 16b.

3 and 7, the left and right chassis 16a and 16b
The inner blade unit 20 detachably mounted between the upper ends of the
The cylinder type rotary inner blade 19, the shaft 35 protruding from both left and right ends of the rotary inner blade 19, and the inner blade holder 37 for rotatably supporting the right end shaft 35 via a bearing 36 are integrally combined. It becomes. The inner blade holder 37 has a housing 38 having an open bottom for accommodating the bearing 36, and a connection frame 39 projecting horizontally from the lower part of the housing 38 to the left.
A gear 40a fixed on the shaft 35 and a gear 40b meshing with the gear 40a are incorporated into the upper and lower gears, and the lower part of the peripheral surface of the lower gear 40b is 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 it can be engaged with and disengaged from the housing 38.

In FIGS. 7 and 9, the structure for attaching and detaching the inner blade unit 20 to and from the upper end of the inner blade drive chassis 16 will be described.
A housing receiving portion 41 that receives and supports the housing 38 of the inner blade unit 20 is provided on the upper end side of the right chassis 16b.
On the upper end side of the left chassis 16a, the shaft 3 on the left side of the rotary inner blade 19 is provided.
A housing 43 accommodating a bearing 42 for supporting the detachable insertion of the housing 5 is integrally formed so as to be higher than the housing receiving portion 41 on the right side. As shown in FIG. 9, an inner blade holder 37 is provided at a lower portion of the housing 43 of the left chassis 16a.
A connection hole 44 is formed in which the tip 39a of the connection frame 39 is inserted and supported so as to be able to be inserted and removed. Further, the left chassis 16a is provided with locking means for locking the leading end 39a of the connecting frame 39 so as not to come out of the connecting hole 44. The locking means mounts an inner blade removal button 45 on the outside of the left chassis 16a so as to be vertically slidable. A connection frame is provided on the inner surface of the inner blade removal button 45.
A lock claw 46 that can be freely engaged and disengaged is provided integrally with the inside of the distal end 39a of the 39. The inner blade removal button 45 is always urged upward by a spring 47, and maintains the engagement state in which the lock claw 46 engages with the distal end 39a of the connection frame 39 from below.

As shown in FIG. 7, a guide frame 48 is integrally extended horizontally between the upper ends of the left and right chassis 16a and 16b.
Guide grooves 49 are provided before and after the inner surface of the guide frame 48 in accordance with the height position of the connection hole 44, respectively. Insert the leading end 39a of the connection frame 39 into the guide groove 49 from the right end side,
By sliding the entire inner blade unit 20 horizontally to the left, the distal end 39a of the connection frame 39 is inserted into the connection hole 44.

Thus, in order to mount the inner blade unit 20 between the upper ends of the left and right chassis 16a and 16b, the inner blade unit 20 moves the connecting frame 39 from the right chassis 16b toward the left chassis 16a with the guide grooves 49.
9, the left shaft 35 is inserted into the bearing 42 as shown by a two-dot chain line in FIG.
Into the connection hole 44. The connection hole 4 is the end 39a of the connection frame 39.
When the tip 39a passes through the lock claw 46 when the tip 39a passes over the lock claw 46, the tip 39a abuts against the taper of the lock claw 46 of the inner blade removal button 45 and once pushes the button 45 against the spring 47. 45 is automatically moved upward by the spring 47 to lock the lock claw 46 by projecting and engaging the inside of the distal end 39a of the connection frame 39.
In addition, as shown in FIG.
38 matches on the housing receiving part 41 of the right chassis 16b,
The gear 40b in the housing 38 is the gear 31 of the drive transmission means 22.
Is obtained. In the mounted state of the inner blade unit 20, the connecting frame 39 is inserted and supported in the connecting hole 44, and is locked in a retaining shape by a lock claw 46, so that the upper and lower, front and rear, left and right A state where movement is regulated is obtained.

At the time of this mounting, since the inner blade unit 20 is integrally provided with the inner blade holder 37, the inner blade holder 37, particularly, the housing 38 can be held between fingers, and the rotary inner blade 19 can be held.
It can be safely installed without directly touching the spiral cutting edge. In addition, the connection frame 39 can be easily mounted by sliding the guide frame 48.

The rotary inner blade 19 may be cleaned even when it is mounted on the inner blade 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 brush bristles 53 harder than that, and the brush bristles on the hard side are provided. On the bristle tip side of 53, an arcuate concave portion 53a is formed along the circumference of the rotary inner blade 19. Thus, as shown in FIG. 10 (b), the arcuate concave portion 53a of the hard brush bristles 53 is applied to a part of the circumference of one end in the axial direction of the rotary inner blade 19 and is slid toward the other end in the axial direction. For example, the hard brush bristle 53 slides along a continuous spiral blade groove from one end to the other end in the axial direction of the rotary inner blade 19, so that the rotary inner blade 19 is forcibly rotated to remove lint. Is scraped off. The handle 51 of the cleaning brush 50 is provided with a finger slip prevention projection 51a to be positioned above the hard brush 53. Therefore, when the handle 51 is held by a finger and slid on the rotary inner blade 19 as described above to clean the handle 51,
Since the upper finger is prevented from sliding in the spiral blade edge direction by the finger non-slip projection 51a, the finger can be safely cleaned without being injured by the spiral blade edge.

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

In FIG. 3 and FIG.
The left and right ends of the plastic motor holder 23 are provided with front and rear support arms 54, 54 which are elastically deformable only in the vertical direction and are horizontally and integrally protruded in the horizontal direction.
By engaging a with the concave portion 55 provided on the inner wall of the main body case 1, the entire inner blade drive unit 15 is vertically movably supported via the elastic deformation of the left and right support arms 54. A compression spring 57 is provided between a bottom side of the inner blade drive chassis 16 and a spring receiver 56 fixed to the main body case 1 so as to correspond to the lower side.
And the spring 57 urges the entire inner cutter drive unit 15 upward and constantly upward on the outer cutter side so that the upper circumferential portion of the rotary inner cutter 19 is always in close contact with the inner surface of the outer cutter 7. I have to.

3 and 4, between the motor 21 and the inner surface of the main body case 1, there is provided a vertical movement guide means 33 for restricting the movement of the inner blade drive unit 15 in the front-rear and left-right directions. The vertical movement guide means 33 includes front and rear cases 1a
A front / rear position restricting rib 58 is integrally protruded from each inner surface of 1b, and guides the motor 21 between the front / rear front / rear position restricting ribs 58 to restrict the entire inner blade drive unit 15 from moving in the front / rear direction. I do. Also, by forming a vertically long circular concave portion 60 on the inner surface of the rear case 1b, projecting a pin 61 from the motor holder 23, and fitting the pin 61 to the concave portion 60 slidably only in the vertical direction. This also ensures that the movement of the inner blade drive unit 15 in the left-right direction is restricted.

1 (a) and FIG. 4, in the main body case 1, below the motor 21, a means 32 for detecting the rotation speed of the motor 21 from its lower output shaft 26 is provided. The rotation speed detecting means 32 is provided with a reflection mark 62 on the lower output shaft 26 of the motor 21.
Is mounted at a constant pitch in the circumferential direction, and a reflection-type photosensor 64 having a light-receiving and light-emitting element arranged in the same direction in opposition thereto is mounted on the circuit board 3 or 4. Place on top. As shown in FIG. 1 (a), the photo sensor 64 irradiates the light emitted from the light emitting element to the peripheral surface of the rotating body 63 to be detected, receives the reflected light by the light receiving element, and detects the reflected light. A detection signal 65 having a pulse rate proportional to is extracted. The detection signal 65 extracted from the 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 extracted from the photo sensor 64 with the value of the reference signal 67, and outputs a drive voltage 68 corresponding to the difference between the two to the motor 21.
To keep the rotation speed constant at all times.

The detection signal 65 output from the rotation speed detecting means 32 is used not only for the rotation control of the motor 21 but also for charging when the rotation speed of the motor 21 is reduced due to the consumption of the rechargeable battery 5 in the rechargeable electric shaver. The present invention can also be used when the necessity is notified by a display lamp or the like.

Since the vertical movement guide means 33 regulates the movement of the inner blade drive unit 15 in the front-rear and left-right directions as described above, the distance between the photosensor 64 and the rotating body 63 for detection, and the The facing position and the facing angle with respect to the central axis of the detection rotating body 63 are always kept constant.
Therefore, the light reflected from the detected rotating body 63 can always be reliably received and sensed by the light receiving element of the photo sensor 64, and a detection error does not occur.

In FIG. 4, a switch case 69 is mounted on the outer surface of the front case 1a so as to be slidable vertically.
A fixed comb blade 70 and a movable comb blade 71 for shaving are provided at the upper portion on the inner surface side of the switch case 69 so that each blade edge protrudes upward, and the motor output is transmitted to the movable comb blade 71 by inheriting the motor output. A drive piece 72 is provided. The switch case 69 is integrally connected to a moderating plate 73 (see FIG. 5) disposed on the inner surface side of the front case 1a. The moderating plate 73 includes a switch leaf spring 74 that comes into contact with and separates from a switch terminal on the circuit board 3 as the switch case 69 slides up and down, and a moderating arm that is detachably engageable with a moderating protrusion 59 protruding from the inner surface of the front case 1a. 75 and has. As shown in FIG. 1 (b), the moderation protrusion 59 is formed by forming the above-mentioned longitudinal movement restricting rib 58 projecting from the inner surface of the front case 1a into an arc shape when viewed from the front, and arranging three of them in the vertical direction. The structure is such that the longitudinal movement restricting rib 58 and the moderation protrusion 59 are also used. However, the moderating protrusion 59 may be provided separately from the front-rear movement restricting rib 58.

Thus, the switch case 69 causes the moderating arm 75 to sequentially engage with the moderating projection 59 in a stepwise manner, so that the lower standby position (switch-off position) indicated by a solid line in FIG. Position (switch-on position)
Then, the drive piece 72 for shaving is further raised and the motor 21
The driving force is transmitted to the movable comb blade 71 by engaging with the shaving drive arm 76 on the upper output shaft 25 of the movable comb blade 71, the fixed comb blade 70, and the rotary inner blade 19 for shaving. A first upwardly protruding use position in which the first cutter and the outer cutter 7 are used in combination with each other;
Shaving blade (movable comb blade 71, fixed comb blade)
70) Only the second upwardly projecting use position of use is positioned and held. In Figure 4, the moving stroke of the motor start position from the lower standby position of the switch case 69 is the sign S _1, also movement stroke from the motor starting position to the first upper projecting use position is the sign S _2, yet a movement stroke from 1 upwardly projecting use position to the second upwardly projecting use position are respectively by reference numeral S _3.

4 and 5, the switch case 69 has a lock button 77 projecting from a hole 78 of the switch case 69 for holding the switch case 69 at the 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. 5 being engaged with an engagement portion (not shown) on the inner surface of the front case 1a. When the button 77 is pressed, the lock claw 79 is disengaged from the engagement portion on the inner surface of the front case 1a and the switch case 69 can be slid upward.

In FIG. 4, FIG. 11 to FIG.
Below the rotary inner blade 19, a lint storage chamber 80 for storing lint falling from the inner blade 19 is formed. As shown in FIG. 12, the lint chamber 80 is formed in a downhill shape including a linear portion 80b inclined downwardly on an inner bottom surface 80a thereof and an arc portion 80c formed continuously below the linear portion 80b. A discharge port 81 is formed at the lower end of the portion 80c so as to face the upper outside of the rear case 1b. A shutter 82 is provided at the discharge port 81 of the lint chamber 80.
12 and an open position (see FIG. 13) that protrudes outward from the discharge port 81 so as to be rotatable about the shaft 83 by approximately 90 degrees. The shutter 82 is interlockingly connected to an opening / closing lever 84 provided on one side surface of the main body case 1 so as to be slidable vertically by a predetermined stroke,
When the lever 84 slides, the shutter 82 moves to the shaft 83.
It opens and closes around. Further, inside the lint chamber 80, a scraping blade 85 is pivotally mounted about a shaft 86 by approximately 124 degrees between a standby position (see FIG. 12) and a scraping end position (see FIG. 13). Is done. The shaft 83 and the shaft 86 are on the same axis. At the standby position of the scraping blade 85 as shown in FIG. 12, the rotary inner blade 19 is rotated so that the lint falling therefrom flows into the reservoir 80 smoothly and surely.
Between the tip 85a of the flute 85 and the linear portion 80b of the inner bottom surface 80a of the fuzz reservoir 80, a flute inflow opening 87 is formed so as to substantially coincide with the downward tangential direction of the inner cutter circumference. And the scraping feather
When 85 rotates from the standby position toward the discharge port, the tip 85
a gradually approaches the circular arc portion 80b of the inner bottom surface 80a, and further in this proximity state, the distal end 85a reaches the circular arc portion 8 to the scraping end position.
When rotated along 0b, the lint on the inner bottom surface 80a is scraped out from the discharge port 81. In the rotation range from the standby position to the tip 85a approaching the inner bottom surface 80a, the scraping blade 85 is rotated in conjunction with the opening operation of the shutter 82. This is automatically performed using the restoring force of the spring 88. For that, the eleventh
As shown in FIG. 14 and FIG. 14, a torsion coil spring 88 is hung between the scraping blade 85 and the main body case 1. The spring
In the initial winding state, one end 88a is formed in a hole 90 provided in a side wall 89 of the lint chamber 80, and the other end 88b is formed in the side wall 89 on the shaft 8.
After passing through a groove 91 formed in an arc shape centered on 3, they are locked in holes 93 provided at an intermediate position between the shaft 86 and the tip 85 a in the side wall 92 of the scraping blade 85.

In the meantime, as shown in FIG. 12, in a state where the shutter 82 closes the discharge port 81 and the scraping blade 85 is at the standby position,
The spring 88 urges the scraping blade 85 to rotate upward by the spread restoring force, and the base end 85b of the scraping blade 85 is moved to the upper end 82a of the shutter 82.
To hold the shutter 82 in the closed state. In this manner, with the shutter 82 closed and the scraping blade 85 in a standby state, the lint falling from the rotary inner blade 19 flows into the lint storage chamber 80 through the frontage 87 and is collected. In this case,
12 As shown in FIG.
In the gap between the circumference of the front frame and the guide frame 48 on the front side, by gradually narrowing from the upper side to the lower side in the rotation direction of the inner blade, the flow rate of the lint in the gap is increased. As a result, the lint can flow smoothly into the frontage 87. Further, in the standby state, the scraping blade 85 prevents the lint from scattering from the frontage 87 to the outside due to the winding of the air flow indicated by the arrow M generated in the lint storage chamber 80 with the rotation of the rotary inner blade 19. It works.

To release the lint in the lint chamber 80, open and close the lever
The shutter 82 is slid upward to open and rotate the shutter 82 around the shaft 83. Then, the scraping blade 85 is initially pushed by the upper end 82a of the shutter 82 and rotates toward the scraping end position. At this time, as shown in FIG.
The movable point A, which is a connection portion between the scraping blade 85 and 88b,
At the point when a dead point is reached on a line segment l connecting the fixed point B, which is the connection portion of the other end 88a with the side wall 92, and the center of the shaft 86 (to minimize the distance between the movable point A and the fixed point B). At the position), the spring 88 is most strongly entangled and deformed. When the spring 88 exceeds its dead center, the spring 88 changes its posture and its spreading restoring force causes the scraping blade 85
Suddenly separates the base end 85b from the upper end 82a of the shutter 82 and rapidly rotates to the scraping end position. Accordingly, the lint in the lint storage chamber 80 is vigorously scraped out of the discharge port 81 at the tip 85a by the rapid rotation of the scraping blade 85, and grips the periphery of the discharge port 81 and the main body case 1. It is preferably discharged without sticking to hands and the like. Since such scraping of the lint is performed with the discharge port 81 directed to a predetermined disposal place such as a litter box, the lint does not scatter around and become dirty.

The scraping blade 85 abuts the end 92a of the side wall 92 against the inner surface of the shutter 82 at the scraping end position as shown in FIG. Therefore, at this time, when the shutter 82 is closed and rotated by the lowering operation of the opening / closing lever 84, the scraping blade 85
It is pushed and moved on the inner surface of 82 and returns to the standby position and rotates,
When the spring 88 goes beyond the dead center at the line segment l, its spreading restoring force causes the scraping blade 85 to be automatically returned to the standby position.

3, 4, 15, and 16, a charging plug unit 6 incorporated on the bottom side of the main body case 1.
As shown in FIG. 4, a plug board 111 sandwiched and fixed between the front and rear cases 1a and 1b, a fixed socket 94 fixed to the lower surface side of the plug board 111 and capable of supplying power via a power cord, A movable plug 95 for charging, which is slidably mounted in the left and right direction on the lower surface side of the board 111 and can be inserted into a wall outlet or the like, is integrally combined.
The fixed socket 94 and the movable plug 95 are alternatively usable.

Plug outlet 96 on one side of the bottom of front and rear cases 1a and 1b
And an operation groove 97 is opened on the bottom surface thereof. The plug outlet 96 is a plug outlet on one side of the front and rear cases 1a and 1b.
Plug cover 98 slidably mounted vertically above 96
It can be opened and closed. The corners of the front and rear cases 1a and 1b on the side having the plug outlet 96 are formed in a curved cross section that is rounded up and down and in the front and rear direction, and the lower end of the plug cover 98 is also formed of the front and rear cases 1a and 1b. It is formed in a rounded shape corresponding to the shape of the corner (see FIGS. 15 and 16). Therefore, even if the body case 1 is squeezed strongly, the palm will not be damaged at the corner.

15 and 16, the lower surface of the plug substrate 111 has a U-shaped plug blade holder 10 in plan view.
1 is slidably assembled in the left and right direction by a predetermined stroke across both front and rear sides of the fixed socket 94. The plug blade holder 101 has a plug blade insertion hole 102
The front and rear hook engaging grooves 103 are respectively slidably engaged with the front and rear hooks 104 projecting downward from the front and rear ends of the plug substrate 111. ing.

The movable plug 95 has a pair of front and rear plug blades 99 and a blade base 100 integrally connected to a base end thereof. This movable plug 9
In 5, the plug blade 99 is straddled on both front and rear sides of the fixed socket 94 and inserted into the plug blade insertion hole 102 of the plug blade holder 101. An operation knob 105 is attached to the bottom side of the blade base 100, and the operation knob 105
The operation groove 97 can be freely slid in the left and right direction, and can be freely disengaged from the concave portions 106 and 107 provided at the left and right end positions of the operation groove 97, respectively.

As shown in FIGS. 15 and 16, when the operation knob 105 is engaged with the concave portion 107 at the right end of the operation groove 97, the movable plug 95 moves the plug blade 99 and the plug blade holder 101 out of the plug. It is in a state of being retracted and stored inside the mouth 96.

Now, when the plug cover 98 is slid upward to open the plug outlet 96, the operation knob 105 is disengaged from the right end recess 107 and then slid leftward along the operation groove 97. The plug blade 99 protrudes from the plug blade insertion hole 102 and the plug outlet 96 until the right end of the hook engagement groove 103 reaches the hook 104. Move the operation knob 105 to the operation groove 9
When the plug blade holder 101 is slid to the left until it engages with the concave portion 106 at the left end of the plug 7, the plug blade holder 101 is moved in this direction through the engagement between the hook 104 and the right end in the hook engaging groove 103.
17 and 18, the plug blade 99 projects from the plug outlet 96 by a predetermined amount as shown in FIGS. 17 and 18, and the tip 101a of the plug blade holder 101 is also connected to the plug outlet 96. Protruding from. In the projecting state of the plug blade holder 101, the flat tip 101a is set so as to be linear with the straight portion S continuing above the rounded portion R at the corner of the curved section of the main body case 1. Therefore, at the time of charging, even when the plug blade 99 is projected from the plug outlet 96 at the corner of the curved section, the tip 101a of the plug blade holder 101
Can be brought into contact with an outlet C (see a two-dot chain line in FIG. 17) such as a wall, and a stable and reliable charging posture can be achieved. Further, when charging is performed using the movable plug 95, the fixed socket 94 is closed by a socket cover 108 integrally formed on the bottom side of the blade base 100. Then, in order to move the movable plug 95 back into the plug outlet 96, the operation knob 105 is
What is necessary is just to slide the inside of the groove 97 until it engages with the concave portion 107 at the right end of FIG.

In FIG. 19, a safety switch 109 is disposed inside the rear case 1b. In the safety switch 109, when the outer blade holder 8 is mounted on the main body case 1 in a normal state, the safety piece 110 protruding from a part of the rear case 1b is continuously pushed on the inner wall of the holder 8 so that the fixing terminal of the safety switch 109 is fixed. When the outer blade holder 8 is removed, the pressing action on the safety piece 110 is released, and the movable terminal 109b is separated from the fixed terminal 109a to open the power supply circuit. It has become. Therefore, when the outer blade holder 8 is removed for cleaning or the like,
It is safe because the rotary inner blade 19 does not rotate carelessly.

20 and 21 show the stand 112. FIG. The stand 112 has recesses 116, 117, 118, and 113 for accommodating the electric razor 113, the power cord 114, the cleaning brush 50, and the case 115 for accommodating the electric razor 113 configured as described above in a standing position. Form 119.

(Another embodiment)

In the above embodiment, a reflection type photosensor 64 is used as the photo sensor 64 of the rotation speed detecting means 32 of the motor 21. Instead, as shown in FIG. A photo interrupter having the above structure may be used, and the detected rotating body 63 on the output shaft of the motor 21 may be arranged between the two elements. In this case, a gear or a disk with a slit is used as the rotating body 63 to be detected.

In the above embodiment, the rotation speed is detected from the lower output shaft 26 of the motor 21. However, the rotation speed may be detected from the upper output shaft 25.

[Brief description of the drawings]

1 (a) is a side view schematically showing a main part of a rotary electric shaver according to the present invention, FIG. 1 (b) is a front view thereof, and FIGS. 2 to 21 are embodiments of the present invention. Fig. 2 is an overall perspective view, Fig. 3 is an overall longitudinal front view, Fig. 4 is an overall longitudinal side view, Fig. 5 is an overall exploded perspective view, and Fig. 6 is protection. FIG. 7 is an exploded perspective view of the inner blade drive unit, FIG. 8 is a cross-sectional view of the outer blade holder, and FIG. 9 is a state in which the inner blade unit is being mounted. FIG. 10 (a) is a front view of the cleaning brush, FIG. 10 (b) is a perspective view showing the state of use thereof, FIG. 11 is a side view of the lint chamber, FIG. 13 is a cross-sectional view of the lint chamber shown in a closed state, FIG. 13 is a cross-sectional view of the lint chamber shown in an open state of a shutter, and FIG. 14 is an exploded perspective view of a lint discharging mechanism. Fig. 15, Fig. 15 is a longitudinal sectional front view of the bottom of the main body case showing the movable plug retracted, Fig. 16 is a sectional view taken along the line XX in Fig. 15, and Fig. 17 is a state where the movable plug is protruded. , FIG. 18 is a cross-sectional view taken along line YY in FIG. 17, FIG. 19 is a front view of a safety switch portion, FIG. 20 is a vertical front view of a stand, FIG. FIG. 21 is a sectional view taken along line ZZ in FIG. FIG. 22 is a front view of a motor rotation speed detecting means showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 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 ……………………………………………………………………………………………………………………………………………………………………………………………………………….

Claims (1)

(57) [Claims] An arcuate outer blade (7) removably mounted on an upper side of a main body case (1), and an inner blade drive unit (15) supported up and down with respect to the main body case (1). When,
Motor rotation speed detection means (3
2) a rotary electric shaver having an inner cutter drive unit (15), wherein the inner cutter drive unit (15) is slidably rotated on the inner surface of the outer cutter (7), and the rotary inner cutter (19).
Blade driving chassis (16) for rotatably supporting the motor, a motor (21) mounted on the inner blade driving chassis (16), and a drive for transmitting the output of the motor (21) to the rotary inner blade (19) The transmission means (22) is integrally combined with the inner cutter drive unit (15) by a spring (57) so that the rotary inner cutter (19) is always in close contact with the inner surface of the outer cutter (7). The whole is urged upward to the outer blade (7) side, and between the peripheral surface of the motor (21) and the inner surface of the main body case (1), before and after the inner blade drive unit (15) and The motor rotation speed detecting means (32) is provided with a rotating body to be detected (63) mounted on the output shaft of the motor (21). A rotary type wherein a photosensor (64) is arranged opposite to a rotating body to be detected (63). Electric razor.