JP3467704B2 - Rotary electric razor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric shaver.
Related to controlling the power supply to the inner blade drive motor.
It has a feature in the mounting mechanism of the switch assembly. 2. Description of the Related Art A rotary electric razor of this type is disclosed.
For example, Japanese Patent Application Laid-Open No. 5-31264 discloses
There is something like that. There is a cylinder-type inner blade,
And a drive transmission mechanism that transmits motor output to the inner blade
To the drive chassis to integrate the drive unit.
Constitute. This drive unit is elastically
With a free-standing support arm, it is supported to be able to float up and down,
Stable posture in which the inner blade is always in close contact with the inner surface of the outer blade
It can be maintained well, and the outer blade moves up and down by being pressed by skin pressure
The inner blade can be smoothly floated up and down following to improve sharpness
I do. On the other hand, it consists of a micro switch in the body case
A switch assembly is provided, and the outer blade holder is attached to the main body case
In the normal state, the switch set is pressed by the pressing action of the holder.
The body closes the power supply circuit to the motor, but removes the outer blade holder
And the pressing action by this is released, and the power supply circuit opens.
It has become. Therefore, the outer blade
When the inner blade is accidentally rotated when the rudder is removed
Safe without any. [0003] However, the above-mentioned
In a rotary electric shaver, the switch assembly is
When assembling inside, separate from the motor holder
And a special switch holder on this spring holding plate.
And attached to this switch holder. In this,
This leads to an increase in the number of materials and assembling man-hours.
It occupies assembling space and has a thin, compact,
Contrary to impact. Also, the specified on the inner surface of the body case
Positioning and fixing the switch assembly by providing ribs and protrusions at locations
Although it is conceivable to do this, special assembly
Time-consuming and requires special space
This also helps the body case to be thinner, smaller, and more compact.
Cause obstacles. [0004] An object of the present invention is to drive the inner blade as described above.
The mobile unit floats up and down in the main body case with the support arm.
In a rotary electric shaver that supports
Switch that controls the power supply to the
Easy installation by mounting with
Reduction in assembly man-hours and elimination of assembly space
The main purpose is to reduce the size of the main body case. [0005] The present invention is based on a row.
The Tali-type electric razor, as shown in the illustration,
The outer blade 3 is in sliding contact with the inner surface of the outer blade 3.
And a drive unit 42 for the inner cutter 2
The drive unit 42 rotates the inner blade 2 freely.
Drive chassis 43 to be supported and mounted on drive chassis 43
Motor 44 and the output of motor 44 to inner blade 2
The drive transmission mechanism 45 for transmitting
Elastically deforms vertically from the moving unit 42 to both left and right sides.
Of the pair of support arms 67 and 68 in a cantilever shape
are doing. And this drive unit 42 is a support arm
Both ends of 67 and 68 are located on the front and rear inner wall surfaces of the main body case 1.
By fixing the support arms 67 and 68,
It is supported to be able to float up and down via deformation. So
In addition, the present invention provides the front and rear support arms 6
Power is supplied to the motor 44 between the opposed ends of the 7.68.
The switch assembly 71 to be controlled is sandwiched and held. The switch assembly 71 is incorporated in the main body case 1.
Before the drive unit 42 is mounted, the support arms 67 and 68
Using elasticity to pinch and hold between the tips
It is easier to temporarily assemble the drive unit 42,
With this temporary assembly, the drive unit 42 and the main body case 1
Can be assembled. The switch assembly 71 is a drive unit.
It is supported and fixed by using the support arms 67 and 68 of the
Therefore, no special assembly member is required. switch
The assembled body 71 is a support for before and after the dead space.
A special group is used because the space between the holding arms 67 and 68 is used.
No mounting space is required. FIG. 1 is a perspective view of a rotary electric shaver according to the present invention.
An embodiment will be described with reference to the drawings. In FIG.
The razor has a rotary inner blade 2
And a cutting head 4 comprising a mesh-like outer blade 3
is there. The bottom of the body case 1 has a charging / AC
A plug 6 is provided. In FIGS. 4 and 5, the main body case 1 is
Butt plastic front and rear cases 1a and 1b
It is integrally connected by upper and lower tightening screws 5. FIG. 5 and FIG.
As shown in FIG. 12 and the outer surface of the front case 1a,
And a power switch button 9 shown in FIG.
Lower standby position (switch-off position) indicated by the solid line shown in
And the motor start position (switch-on position
) And slide it up and down freely.
The switch button 9 is arranged along the inner surface of the front case 1a.
The switch leaf spring 10 is integrally connected to the
A circuit board to be described later in which the switch leaf spring 10 is moved by sliding.
11 open and close the terminals of the drive circuit. On the other hand, as shown in FIGS.
A rear panel 13 for makeup is provided on the outer surface of the case 1b.
The shaving unit 14 is mounted on the upper part of the
Switch between the use position and the retracted storage position around the shaft 15
Up and down slide type shaving operation button 16
Install it up and down. As shown in FIG. 5 and FIG.
Lot number is assigned to a part 112 such as a convex shape formed at the bottom of 1b.
No., manufacturing type name, manufacturer name, etc.
Window with a part 112 at the bottom of the rear panel 13
It is structured to be exposed from the part 113 to the outside. This
The rear wall structure of the main body case 1 is made up of a rear case 1b and a rear panel.
13, the rear panel 13 is made of an expensive material.
And the rear case 1b is removed for repair, repair, etc.
Even when replacing, the expensive rear panel 13 can be used as it is.
And the rear panel 13 can be plated on the surface
Is imprinted or imprinted on the display is impossible or difficult
It is difficult, but it is possible
is there. In FIG. 3 and FIG.
The tongue 16 is provided with a finger hook 115. Also book
When grasping the body case 1, a grasping finger (usually an index finger or
The concave portion 116 on which the middle finger is applied is partly and
Shave operation button 16 in one slide position
Thus, it is formed in an elliptical shape in a front view. The finger
The projection 115 is an arc so as to follow the elliptical shape of the recess 116.
It is formed in a shape. The outer blade 3 is attached to the upper part of
It is detachably mounted with the holder 17. Shown in FIG.
As described above, the outer blade 3 is
It is bent into an arch shape along the blade 2 and held and fixed to the outer blade frame 19.
You. As shown in FIG. 17, the outer cutter frames 19 face each other.
The left and right frame portions 19a and 19b and the left and right frame portions 19a and 19b
Connect the lower front part and the lower rear part
Formed into a rectangular frame shape with front and rear frame portions 19c and 19d
Is done. And the arch-shaped outer blade 3 is the front and rear end 3 of this.
a, 3b outside each of the front and rear frame portions 19c, 19d of the outer blade frame 19.
On the surface and projecting from the front and rear frames 19c and 19d
And caulked together with the caulked pins 20
At the same time, the arc-shaped left and right ends 3c and 3d are
Arc-shaped outer blade receiving steps protruding from inner surfaces of 9a and 19b
It receives and supports each on the arc edge of the part 21. As described above, the outer blade 3 has four ends 3a and 3
b, 3c and 3d are replaced with the four-sided frame portions 19c and 19d of the outer cutter frame 19.
・ To be tightly and integrally fixed to 19a and 19b respectively
Can bend locally due to the pressing force of the skin.
And a strong adhered state with less. The outer cutter frame 19 on which the outer cutter 3 is stretched is
Front and rear left and right walls 17a, 17b, 17c, 17 shown in FIG.
d from below the square cylindrical outer blade holder 17 having
To be able to move up and down by a predetermined stroke inside
After the fitting, the disc-shaped piece 22 is moved to the outer blade holder.
Out of the notch 23 at the upper end of each of the right and left walls 17c and 17d of 17
Square holes provided at the upper ends of the right and left frame portions 19a and 19b of the blade frame 19
24 so that they are integrally connected (see FIG. 18).
See). In FIGS. 18 and 19, an outer blade holder is provided.
The upper limit movement of the outer blade 3 in the outer blade 17 is controlled by the outer blade holder 1.
7, three projections 25 provided on the inner surface and
This is performed by engagement with a projection 26 provided on the blade frame 19. So
The lower limit movement of the pin is defined by a pin protruding from the inner surface of the outer cutter holder 17.
27 into a notch 29 provided at the lower end of the outer cutter frame 19.
And done by In addition, the lower limit movement regulation is
Abutment engagement action of piece 22 with notch 23 of rudder 17
It is always done. The piece 22 is composed of left and right frame portions 19a of the outer cutter frame 19.
・ Attached to the 19b side, outside the outer blade holder 17
The blade frame 19 is assembled so as to move in accordance with the vertical movement thereof.
As a result, for example, the piece 22 is compatible with the end face shape of the inner cutter 2.
If it is formed in a similar circular shape, the outer cutter 3
As the frame 19 moves up and down with respect to the outer blade holder 17,
In a plan view, the piece 22 moves up and down within the notch 23,
Movement is as if the inner blade 2 itself is on the inner surface of the outer blade 3
Impress the user with such vertical movement
It is. Further, the piece 22 is formed into an end face shape of the inner cutter 2.
The outer blade frame 19 is formed in a circular shape similar to
If it is made transparent, the rotation state of the end face of the inner blade 2 will be described later.
The rotation status of the gear 59, or separately from the gear 59
When arranging disks, check the rotation status of the disks from the outside.
To present the feeling of a rotary electric razor to the outside.
Can be. The back surface of the outer blade holder 17 has long hairs and
A comb 30 for guiding the hair to the outer blade 3 is attached.
I have. At the lower end of the front wall 17a of the outer blade holder 17, as shown in FIG.
As shown, from the switch button 9 on the outer surface of the front case 1a
An arc-shaped notch that matches the outer shape of the bulge 31 provided above
32, and at the lower part of the rear wall 17b of the outer blade holder 17,
A square that escapes from the shaving unit 14 as shown in FIG.
The notch 33 of the outer blade holder 17
It can be formed in an asymmetric shape. So this
The outer blade holder 17 can be easily distinguished before and after.
This is convenient for leverage. The outer blade holder 17 has the notch 3
2 is engaged with the bulging portion 31 so that the outer blade holder 1 is
7 also helps to prevent rattling in the left-right direction. As described above, the outer blade holder 17 is
It is detachably attached to the upper part of the switch 1. for that reason
In addition, as shown in FIG. 6 and FIG.
Slits to be described later on the inner surfaces of the left and right walls 17c and 17d.
A concave portion 34 is provided straddling the upper case 37 and is located on the left and right sides of the main body case 1.
Engagement mounted on the ends via springs 35 so as to be freely retractable
By engaging the concave portion 34 with the
The mounted state of the rudder 17 is maintained. Left of outer blade holder 17
Remove each slit 37 provided on the right wall 17c / 17d
The button 39 is moved inward and outward with its upper end 39a as a fulcrum.
On the outer blade holder 17
To press the lower end 39b of the button 39 with a finger.
When the helicopter 36 is immersed, the outer blade holder 17 is
1 can be withdrawn upward. The inner blade 2 is, as shown in FIG.
The mold has a plurality of spiral cutting blades 40 on its peripheral surface.
And the shaft 41 is integrally protruded from the center of each of the left and right end faces.
ing. The drive unit 42 of the inner blade 2 is located in the main body case 1.
Be incorporated. The drive unit 42 is shown in FIG.
The inner blade 2 is rotatably mounted on the shaft so that the pre-assembled state is shown.
Drive chassis 43 and a motor mounted on the drive chassis 43.
The rotation of the motor 44 and the motor 44
Do not combine the drive transmission mechanism 45 for transmitting
You. As shown in FIG.
The bearings 46 for receiving the left and right ends of the shaft 41 of the inner cutter 2
Left and right chassis 47 and 48 and left and right chassis 47
· Upper chassis 4 for integrally connecting the upper ends of 48
9 and the lower ends of the left and right chassis 47 and 48
And a bottom chassis 50, which is connected
And a rigid body that is square in front view as shown in FIG.
Assembled together to form a structure. Bottom chassis 5
The motor 44 is below the plastic motor housing.
It is attached integrally with a damper 51. In this case the bottom
Two motors 44 and two motor holders 51 for the chassis 50
Together. Drive transmitter mounted on drive chassis 43
The structure 45 is, as shown in FIG.
Protruding above the data holder 51 and the bottom chassis 50
The output gear 54 is fixed to the output shaft 53,
Rotate the intermediate shaft 55 between the upper left and right chassis 47 and 48
At the center of the intermediate shaft 55 in the axial direction.
The face gear 56 is engaged with the output gear 54 at right angles.
Gear 57 fixed to the left end of the intermediate shaft 55
Multi-stage gear 5 housed between gear 47 and gear cover 47a
8 meshed. In FIG. 6, outside the left bearing 46
The gear 59 fixed to the left end of the shaft 41 of the inner cutter 2 and the gear 59
The upper and lower two gears 60 to be meshed
Cover both gears 59 and 60 with an open bottom gear cover 61
The lower gear 60 facing the open bottom of the gear cover 61
The upper gear of the multi-stage gear 58 is meshed. Accordingly
The rotation of the motor 44 is controlled by the intermediate shaft 55, the multi-stage gear 58,
And transmitted to the inner cutter 2 via the gears 59 and 60. The inner blade 2 is driven to make it possible to replace it.
It is detachably attached to the moving unit 42. for that reason
Next, the left side of the inner blade 2 is shown in FIG.
Of the left bearing 46 and the gears 59.6
0 from the bearing 46 to the connecting frame.
62 is integrally provided right below the inner cutter 2 so as to protrude therefrom. The inner blade 2 is mounted on the drive unit 42.
, The shaft 41 on the right side of the inner cutter 2 is pulled out to the bearing 46 on the right side.
And insert the left bearing 46 into the left shear
It is detachably connected to the upper end of the shell 47. At this time, inner blade 2
As shown in FIG.
By sliding along the inner surface of the
Insert the right shaft 41 into the right bearing 46 as shown by the line.
And the lower part of the right bearing 46 of the upper chassis 49
Into the coupling hole 63 on the side. The tip of the connection frame 62 is connected
When inserting into the hole 63, the tip is
The release plate 64 is once brought into contact with the taper of the
Push down against 66. The tip of the connection frame 62 is a lock claw
65, the inner blade removal plate 64 is moved by the spring 66.
The lock claw 65 moves up automatically and the lock claw 65
Side and lock. Also, as shown in FIG.
The left bearing 46 and the gear cover 61 are connected to the left chassis 47.
Fixed to the upper end of the gear cover 47a of
The gear 60 in the rear cover 61 is a multi-step gear of the drive transmission mechanism 45.
A state where the gear 58 meshes with the uppermost gear is obtained. The drive unit 42 is shown in FIGS.
As shown in the left side of the plastic motor holder 51,
Before and after elastically deformable only in the vertical direction from the right end
Cantilever the thin support arms 67 and 68 horizontally in the horizontal direction
The front and rear support arms 67 on the left side
・ The front ends of 68 are connected with one connecting pin 69 facing forward and backward.
The right and left support arms 67 and 68 are connected together.
The front and rear connecting pins 69 are respectively separated at the tips.
Separately and integrally formed with each other, this separate type of connecting pin
A flange 70 is attached to 69. As shown in FIG. 11, the outer cutter 3 is attached to the outer cutter holder.
Inner blade 2 turns when removing 17 and cleaning lint
Drive unit for safety purposes to prevent
The microcontroller 42 controls the power supply to the motor 44.
Switch assembly 71 consisting of switches etc.
Assemble. That is, as shown in FIG.
Reference numeral 1 denotes mounting holes 7 on the front and rear surfaces of the plastic case 72.
3 and a right support arm 67.6 in the mounting hole 73.
8 support pins 69
By holding using the elasticity of the arms 67 and 68
It is temporarily held. This switch assembly 71 is temporarily fixed.
It can be easily performed by utilizing the elasticity of the holding arms 67 and 68. Ma
Between the connecting pins 69 and 69 of the supporting arms 67 and 68
The switch assembly 71 is securely held by the elastic clamping of
Therefore, the drive unit 42 is assembled to the main body case 1.
Do not drop out of the drive unit 42 until
No. Further, the drive unit 42 includes a motor 44
The circuit board 11 shown in FIG.
44 and the switch assembly 71 via a lead wire in advance.
It is preassembled by being drawn. Front circuit board 11
Has two rechargeable batteries 75 such as NiCad
It is mounted so that it is located to the left and right of. As shown in FIG.
In addition, the battery 75 has a terminal plate 76a soldered to both poles thereof.
・ 76b is bent and elastic deformation mounted on the circuit board 11 is performed.
Cut-and-raised pieces 79a / 79 of freely-shaped terminal plates 77a / 77b
b to make elastic engagement contact. This contact state
Tighten the front and rear cases 1a and 1b with the tightening screws 5.
The battery 75 on the circuit board 11 on the inner surface of the rear case 1b.
Against the terminal plates 76a and 76a on the battery 75 side.
b and the terminal boards 77a and 77b on the circuit board 11 side
Contact can be made with a contact pressure. Circuit board like this
Battery 75 attached to 11
The body case 1 is disassembled, and the terminal plates 76a and 76b are cut and raised.
Circuit board 11 by extracting from 79a / 79b
Can be easily removed and its disposal can be done easily.
You. Thus, the pre-assembled drive
The moving unit 42 includes front and rear cases 1a and 1b of the main body case 1.
It is built in. At this time, the drive unit 42 is
As shown in FIG. 4 and FIG.
Left and right slits on the upper walls of the front and rear cases 1a and 1b
It is assembled so as to project upward from 90. Figure 5
As shown in FIG. 9 and FIG.
The front and rear ends of the pin 69 are provided on the inner walls of the front and rear cases 1a and 1b.
It is inserted and fixed in the hole 92a of the girder boss 92. As a result, the switch assembly 71 is clamped.
The mating pins 69 are located between the inner walls of the front and rear cases 1a and 1b.
The forward / backward movement is restricted, and the switch assembly 71 is held in a sandwiched state.
Is fixed between the front and rear cases 1a and 1b with screws.
Since it is more firmly held according to the tightening state,
Make sure that the fixed state of the switch assembly 71 in the body case 1
Make things. In this case, the inner side of the body case 1
7 and the forward movement of the switch assembly 71 as shown in FIG.
Provide ribs 93 and 94 for regulating and upward movement
Position and fix the switch assembly 71 more securely
It is preferable in doing. As shown in FIGS. 6 and 7,
Between the left and right chassis 47 and 48 and each slit 90
The gap is provided in advance in each of the chassis 47 and 48 and is flexible.
It is closed by the hair intrusion prevention rubber 91. The drive unit 42 is incorporated as described above.
Then, the entire drive unit 42 including the inner blade 2 is
Floatable up and down via elastic deformation of support arm 67
Supported by Also, as shown in FIG. 6 and FIG.
Between the bottom side of the chassis 43 and the spring receiver 95 on the body case 1 side;
A push-up spring 96 is interposed between the push-up springs 96.
The drive unit 42 has a bullet that always pushes it up
The inner cutter 2 is brought into close contact with the inner surface of the outer cutter 3 by urging. Figure
As shown in FIG. 7, one push-up spring 96 is connected to the right chassis 4.
8 and the other push-up spring 96 (see FIG. 6).
By setting the distance between the
When the drive unit 42 is not twisted or tilted when floating
It floats stably. In a normal state, as shown in FIG.
The outer blade 3 is pushed up by the inner blade 2,
, Which are integrally connected to both ends of the
The base 22 slightly rises from the notch 23 of the outer blade holder 17.
The state is presented, and as shown in FIG.
When the piece 22 is pushed down, the piece 22
It approaches or contacts the notch 23. In front of switch assembly 71
The connecting pins 69, 69 sandwiching the rear are supported arms 67.6.
8, the floating operation of the drive unit 42
Occasionally, the elastic deformation of the support arms 67 and 68 is hindered.
There is no such thing. In FIG. 7 and FIG.
Outer blade holder 17 is attached to body case 1 for body 71
At the time of the normal state, as shown in FIG.
Switch operation that protrudes from a part of body case 1 at the lower end
The work piece 97 presses the plunger 98 of the switch assembly 71.
The switch assembly 71 continues to supply power to the motor 44.
Close the road. Remove the outer blade holder 17 as shown in FIG.
And the pressing action on the switch operation piece 97 by this
It is released and the power supply circuit is opened. did
When the outer blade holder 17 is removed for cleaning or the like,
It is safe because the inner blade 2 does not rotate carelessly.
You. Detailed shape of the switch operation piece 97
Pressed by the outer blade holder 17
Piece 97a, and a pressing action piece 97b for pushing the plunger 98;
Are formed so as to be connected in the shape of a "ku", and the pressing operation piece 97 is formed.
A taper 100 is provided at the tip of b. On the other hand,
The taper 99 corresponding to the inclination of the pressed piece 97a
A taper 89 corresponding to the taper 100 is provided.
The switch operation piece 97 is pressed by the outer blade holder 17.
The plunger
98, the outer blade holder 17 is removed from the main body case 1.
When the pressing action by this is released, the plunger 98
As it is protruded by the return spring (not shown),
Pushed up to position. In FIG. 21, on the rear side of the main body case 1,
The shaving unit 14 to be mounted is a shaving holder.
Fixed comb blade 102 fixed to 101 and movable comb blade 103
And a movable comb blade 10 inheriting the motor output.
3 is provided on the movable comb blade 103
I have. Shaving unit 14 with its cutting edge facing down
The storage posture (solid line diagram) along the outer surface of the rear case 1b,
Usage posture (the two-dot chain line)
(See Fig.)
You. The posture switching operation is performed by vertically moving the outer surface of the rear case 1b.
A shaving operation button 16 slidably provided;
The button for connecting the operation button 16 and the shaving unit 14
This is performed with the shaving lever 105. On the other hand, the vibrator 1
06 is incorporated. The vibrator 106 rotates the motor 44
Transfer the rolling to the movable comb blade 103 of the shaving unit 14
At the rear end, the engaging element 10 on the movable comb blade 103 side
4 and has a claw 107 which engages with
Long in the front-rear direction to be fitted to the eccentric cam 109 on the force shaft 53
Having a hole 110 in the shape of
1 and pivotally attached to a pin 111 protruding from the front side of the upper surface.
I do. In such a case, the vibrator 106 has an eccentric force.
Rocking around pin 111 in response to rotation of
When the shave unit 14 is in the projecting use position,
104 engages with the claw 107 of the vibrator 106.
Thus, the driving force is transmitted to the movable comb blade 103. This
The vibrator 106 is located on the upper surface of the bottom chassis 50 and behind the upper surface.
Between the gate-shaped guide rod 114 provided on the side (see FIG. 14)
Through the guide action of the guide rod 114.
Vibrator 106 swings smoothly without twisting up and down
I do. In addition, the oscillating arc locus of the claw 107 of the vibrator 106
In front of the vibrator 106 to make the
The rearward length can be set within the limited space of the main body case 1.
It is desirable to take as long as possible. Therefore, the vibrator 1
The front end of 06 is inside the bulging portion 31 of the front case 1a.
It is preferable to fit in the recess 31a on the surface side.
No. In the present invention, the tips of the support arms 67 and 68
As the switch assembly 71 for holding and holding between the members,
In addition to the safety switch described above, for example, the power switch
Switch leaf spring 10 and switch on circuit board 11
This power switch is composed of a switch
Connecting the switch assembly to the connecting pins 69.6 of the support arms 67 and 68
It is also possible to hold between nine. The switch assembly 71 is connected to the support arm 67.
・ The means for pinching and holding between the 68 tips
22 (A) and 22 (B). So
Here, a boss 1 provided at each end of the support arms 67 and 68 is used.
17 and holes of both bosses 117 and a switch assembly
A connecting pin 69 separate from these is passed through the mounting hole 73 of
As a result, the switch assembly 71 is temporarily held. I
After that, both ends of the connecting pin 69 are connected to both bosses 117,
Means that only both ends of the coupling pin 69 are in the front and rear cases 1a and 1b.
Fit into the hole 92a of the boss 92 of the wall,
1b using the tightening force of the screw 5
1 is tightly held. Switch operation peak
The position of the protrusion 97 from the main body case 1 is
A location other than the above location may be used.
It is necessary to push the
You. As described above, according to the present invention, the switch
The switch assembly 71 is easily temporarily assembled to the drive unit 42.
And the main unit cable can be
Can be mounted on the device 1 to reduce the number of mounting steps.
be able to. The switch assembly 71 is
It is supported and fixed using the support arm 67, so a special
The number of parts can be reduced without the need for assembly members.
it can. The switch assembly 71 includes front and rear support arms 67.
Special assembling using space between 67
No space is required, and the body case 1 is thin and compact.
Can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view schematically showing a main part. FIG. 2 is an external perspective view seen from the front. FIG. 3 is an external perspective view seen from the rear. FIG. 4 is an overall vertical sectional front view. FIG. 5 is an overall vertical side view. FIG. 6 is a vertical sectional front view of a left chassis portion. FIG. 7 is a vertical sectional front view of a right chassis portion. FIG. 8 is a front view of a safety switch portion. FIG. 9 is a side view of a safety switch portion. FIG. 10 is a sectional view showing a state in which the inner blade is being mounted. FIG. 11 is an overall exploded perspective view. FIG. 12 is an exploded perspective view of a front case. FIG. 13 is an exploded perspective view of a rear case. FIG. 14 is an exploded perspective view of a drive unit. FIG. 15 is a perspective view of an inner blade. 16A is a perspective view of a state where a circuit board and a battery are separated, and FIG. 16B is a side view of a state where a battery is mounted on the circuit board. FIG. 17 is an exploded perspective view of the outer blade. 18A is a longitudinal sectional front view showing a state where an outer blade is pushed up by an inner blade, and FIG. 18B is a longitudinal sectional front view showing a state where the outer blade is pushed down by skin. FIG. 19 is a longitudinal sectional side view showing a state where an outer blade is pushed up by an inner blade. FIG. 20 is a longitudinal sectional side view showing a state where the outer blade is pressed down by the skin. FIG. 21 is a vertical sectional side view showing a drive system and an operation system of the shaving unit. FIG. 22A is an exploded perspective view showing another holding means of the switch assembly, and FIG. 22B is a cross-sectional view showing an assembled state thereof. [Description of Signs] 1 Body case 2 Inner blade 3 Outer blade 42 Drive unit 43 Drive chassis 44 Motor 45 Drive transmission mechanism 67/68 Support arm 69 Coupling pin 71 Switch assembly

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-232095 (JP, A) JP-A-5-184736 (JP, A) JP-A-3-224588 (JP, A) JP-A-5-224588 184730 (JP, A) JP-A-3-297488 (JP, A) JP-A-3-242191 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B26B 19/38

Claims (1)

(57) [Claims] [Claim 1] A main body case (1) and a main body case (1)
An arch-shaped outer blade (3) provided at the upper part of the outer blade, a cylindrical inner blade (2) that rotates in sliding contact with an inner surface of the outer blade (3), and a drive unit (42) for the inner blade (2). The drive unit (42) includes a drive chassis (43) rotatably supporting the inner blade (2), a motor (44) mounted on the drive chassis (43), and a motor (44). A pair of front and rear support arms (67), which are integrally combined with a drive transmission mechanism (45) that transmits output to the inner blade (2), are elastically deformable vertically from the drive unit (42) to both left and right sides. (68) is protruded in a cantilever manner, and both ends of the support arms (67) and (68) are fixed to the inner surfaces of the front and rear walls of the main body case (1). The drive unit (42) moves up and down through the elastic deformation of (68). In a rotary electric shaver movably supported, a switch assembly () for controlling power supply to a motor (44) between opposed ends of front and rear support arms (67) and (68) on one side of the left and right sides. 71) A rotary electric shaver characterized by holding and holding 71).