JPH10216374A - Shaver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the operation of removing an outer-blade holder. SOLUTION: A removable plate 125 having engaging claws 126 with which an outer-blade holder is engaged is provided inside a base in such a way as to freely slide horizontally. The removable plate 125 has right and left engaging claws 126, right and left frame parts 135, 136 moving the right and left engaging claws to released positions, and front and rear frame parts 133, 134 connecting the right and left frame parts together, all of which are formed integrally with one another. When a part 131 to be pressed is pressed into the base (to the left) from outside a main body case, the removable plate is slid to the left as it is guided by the front and rear wall parts 242, 243 of the base, and as the engaging claws 126 on both sides of the part 131 to be press-sunk into the base, the curved parts 139a, 139b of a double-mountain-shaped part 139 are elastically deformed (the state indicated by the two-dot chain line in the figure) by a thin-walled part 137 and thin-walled junctions 139c, 139d as they are pressed by a rib 134, and with this elastic deformation, a rod-shaped part 140 is drawn into the base together with the left side plate part 127 and the engaging claws 126. As a result, the outer blade holder is unlocked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric razor characterized by a mechanism for attaching and detaching an outer blade holder.

[0002]

2. Description of the Related Art An electric shaver having an outer blade holder detachably provided is disclosed, for example, in Japanese Patent Application Laid-Open No. 7-299262. In this case, an attaching / detaching mechanism of the outer blade holder includes a latch member that engages with the groove of the outer blade holder, a control member that controls movement of the latch member via the control groove and the control cam, and a mechanism that moves the latch member in one direction. A biasing spring. Then, to remove the outer blade holder, when the control member is slid left and right by an external operation, all the latch members engaged with the grooves of the outer blade holder are disengaged at once, and the outer blade holder is removed. It can be removed by grasping the front and rear walls by hand and lifting it up.

[0003]

However, in the above-mentioned mechanism for attaching / detaching the outer blade holder, grooves for engaging the latch members are provided on the inner surfaces of the front and rear walls of the outer blade holder. Matches where you can grab by hand when removing. Since the outer blade holder is formed in a hollow shape between the front and rear walls and the left and right side walls, the front and rear walls are easily bent inward so as to be depressed inward when grasped by hand. For this reason, when the outer blade holder is removed, the groove is deformed by the deflection of the front and rear walls gripped by hand and engaged with a state in which the latch member is squeezed to the tip of the latch member. This makes it difficult for the outer blade holder to come off easily. In addition, with the attachment / detachment mechanism of the outer blade holder,
Since the movement of the latch member is controlled by the control member via the control groove and the control cam, the number of members is large,
There is also a problem that the number of assembling steps is increased.

[0004] An object of the present invention is to solve such a problem, and an object of the present invention is to provide an electric shaver in which an outer blade holder can be constantly attached and detached smoothly. An object of the present invention is to provide an electric razor that can simplify the engagement lock mechanism of the outer cutter holder.

[0005]

An electric shaver according to the present invention is characterized in that it is constructed as follows. FIG. 10, FIG.
As shown in FIG. 6 and FIG.
The outer blade holder 29 which is formed in a hollow shape having left and right and left side walls 96 and 97 and holds the outer blade 27 in an arch shape, grasps the front and rear wall portions 94 and 95 so that the outer blade holder 29 The outer blade holder 29 is provided with an engagement lock mechanism 63 on the upper part of the main body case 1.
Are provided, the left and right side walls 96 of the outer blade holder 29.
97, an engagement recess 147 is provided on each inner surface, and the engagement lock mechanism 63 has a detachable plate 125 slidably mounted in the upper right side of the main body case 1 in the left-right direction. The removal plate 125 is provided with the engagement recess 147.
Left and right side plate portions 127 and 129 integrally protruding locking claws 126 which are removably engaged with the left and right sides, respectively.
And a frame molded part 130 in which the left and right side plate parts 127 and 129 are integrally connected to each other.
The main body case 1 is provided with a pressed portion 131 that is pressed from the outside to the inside, and the frame plate portion 130 is integrally formed with the front and rear frame portions 133 and 134 and the left and right side plate portions 127 and 129, respectively. The left and right frame portions 135 and 136 are connected to each other.
The left frame 135 or the right frame 136 on the side not provided with the pressed portion 131 is provided with a thin spring portion 137. The left frame part 135 or the right frame part 13 which is elastically deformable
6 abuts against the rib 143 provided inside the upper portion of the main body case 1 as the pressed portion 131 is pressed inwardly into the upper portion of the main body case 1, and is elastically deformed by the abutting action to be pressed. It is required that the left frame plate portion 127 or the right frame plate portion 129 on the side not provided with 131 be drawn into the upper part of the main body case 1.

On the upper part of the main body case 1, left and right side frames 45 and 46 are provided opposite to each other. Then,
The outer blade holder 2 is attached to the side frames 45 and 46.
9 is provided so as to be freely inserted and removed, and a cylindrical rotary inner blade 26 is provided between the side frames 45 and 46 for slidingly rotating the inner surface of the outer blade 27 about an axis 75. The drive transmission means 66 for transmitting the rotation of the motor 35 in the main body case 1 to the rotary inner blade 26 is provided on one of the left and right side frames 45 and 46, and the pressed portion 131 is provided on the other.

[0007]

In FIG. 19, when the pressed portion 131 is pressed inwardly (leftward) from the outside of the main body case 1, the removal plate 125 slides leftward, and the locking claw of the right side plate portion 129 is engaged. At the same time, the left frame portion 135 is pressed against the rib 143 and the thin portion 13
7, the left side plate portion 127 is pulled into the upper part of the main body case 1 together with the locking claw 126 along with the elastic deformation. As a result, the outer blade holder 29
Is released.

The locking claws 126 of the detaching plate 125 are detachable from the engaging recesses 147 of the left and right side walls 96 and 97 of the outer blade holder 29. When the front and rear wall portions 94 and 95 are depressed and deformed inward when they are gripped and removed by hand, regardless of this deformation, the locking claw 12 can be operated by pressing the removal plate 125.
6 can be smoothly removed from the engagement recess 147.

The detaching plate 125 has left and right locking claws 126, left and right frame portions 135 and 136 that act to move the left and right locking claws 126 to the release position, and the left and right frame portions 135 and 1
Since all of the front and rear frame portions 133 and 134 connecting the 36 are integrally formed, only the return spring member 146 is required in addition to the removal plate 125, and a small number of members and assembling man-hours are sufficient.

A drive transmitting means 66 for transmitting to the rotary inner blade 26 is provided to one of the left and right side frames 45 and 46.
By disposing the pressed portions 131 on the other side, the outer blade holder 29 can be removed by pressing the removal plate 125 without any hindrance to the drive transmission of the rotary inner blade 26.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

(Overall Structure) As shown in FIGS. 1 to 3, this electric razor has a cutting head 2 mounted on an upper part of a main body case 1, and the cutting head 2 has a razor unit 3.

(Body Case) In FIGS. 1 to 3,
The main body case 1 is a front and rear case 1F
1B, and side covers 1L and 1R fitted to close the opening 4 formed between the left and right butting surfaces of the front and rear cases 1F and 1B. Electrical components such as a circuit board 5 and a battery 6 are incorporated in the main body case 1, and a charging plug 7 is provided at a lower end portion of the main body case 1. On the front surface of the front case 1F, a start / stop switch knob 9 is provided so as to be slidable up and down, and an indicator 10 for displaying a charge state is provided, and the decorative panel 11 exposes the switch knob 9 and the indicator 10. It is polymerized and fixed. Also,
As shown in FIG. 6, a shaving unit 12 and an operation knob 13 for swinging and retracting the shaving unit 12 are provided at an upper portion of a rear surface of the main body case 1.

(Head Guide Tube) As shown in FIGS. 5 and 7, a head guide tube 14 for holding the cutting head 2 so as to be vertically movable is mounted in the upper end opening of the main body case 1. The head guide tube portion 14 is attached to the main body case 1.
Is formed in a bottomed cylindrical shape having a peripheral wall 15 having a shape along the inner circumference of the upper end opening and a cylindrical bottom wall 16 having an opening 16a in the center, and mounting pieces 17 are integrally formed on the left and right front ends of the cylindrical bottom wall 16. Form. On the other hand, the mounting piece 17 is provided on the inner surface of the upper end of the front case 1F.
Left and right bosses 1 for integrally connecting
9 is protruded.

(Cutting Head / Shaving Blade Unit) As shown in FIGS. 7 and 16, the cutting head 2 includes a drive chassis 23 fitted inside the head guide tube portion 14 so as to be vertically movable,
A combination with the shaving blade unit 3 mounted on the drive chassis 23 is provided. The shaving blade unit 3 includes a base 24 supported on the driving chassis 23 so as to be swingable back and forth, an inner blade holder 25 detachably mounted on the base 24,
A cylindrical rotary inner blade 26 held by the inner blade holder 25, an outer blade 27 and an outer blade holder 29 thereof,
It comprises a movable comb blade 30 and a fixed comb blade 31.

(Driving Chassis) As shown in FIG. 8, the driving chassis 23 includes a lower chassis 23D fitted inside the head guide cylinder 14 so as to be vertically movable, and a lower chassis 2D.
And an upper chassis 23U integrally coupled to the upper portion of the 3D. The lower chassis 23D includes the head guide cylinder 1
4 having a peripheral wall 32 fitted inside and a chassis bottom wall 33;
A vertical motor 35 is inserted into a central opening 34 of the chassis bottom wall 33.
Are attached in a hanging state with screws 36 (see FIG. 6), and the output shaft 37 at the upper end of the motor 35 is projected upward from the opening 34.

At the time of assembly, for example, the head guide cylinder 14 is attached to the upper end of the main body case 1 in advance, while the shaving blade unit including the drive chassis 23, the base 24, the inner blade holder 25, the outer blade holder 29 and the like. The cutting head 2 is assembled by assembling the cutting heads 2 with each other. That is, as shown in FIG. 5 and FIG.
The front side of the peripheral wall 15 is superimposed on the inner surface of the upper end of the front case 1F so that the mounting piece 17 and the boss 19 coincide with each other, and the set screw 20 is inserted through the hole 17a of the mounting piece 17 into the boss 19.
By screwing the head guide tube portion 14 and the front case 1F together. Next, the rear case 1B is abutted against the front case 1F, and the inner surface of the upper end of the rear case 1B is superimposed on the rear surface side of the peripheral wall 15 of the head guide tube portion 14 in an intimate manner to integrally connect the front and rear cases 1F and 1B. I do. At this time, the head guide cylinder portion 14 is assembled such that the upper end of the peripheral wall 15 projects slightly upward from the upper end edges of the front and rear cases 1F and 1B. Next, the lower chassis 23D of the pre-assembled cutting head 2 is fitted into the head guide cylinder 14 from above, and the motor 35 is connected to the opening 16a of the cylinder bottom wall 16 of the head guide cylinder 14.
Protrude downward. At that time, the lower chassis 23D
As shown in FIG. 5, the left and right hook-shaped retaining claws 39 projecting downward from the chassis bottom wall 33 are inserted into the openings 16a of the cylinder bottom wall 16 of the head guide cylinder portion 14 so that the openings 1 are formed.
The upper edge 6b is engaged with the edge 16b of the upper edge 6a in a retaining shape. Further, a push-up spring member 42 is interposed between the boss 40 provided on the lower surface of the chassis bottom wall 33 and the spring receiver 41 on the inner bottom of the head guide cylinder 14. As a result, the entire cutting head 2 including the motor 35 is constantly urged upward by the push-up spring member 42, and is elastically supported so as to be vertically movable by a predetermined stroke.

As shown in FIG. 8, the upper chassis 23U has a bottom frame 44 having an arcuate concave surface 43 formed on the upper surface.
A pair of left and right side frames 45 and 46 are erected from the left and right ends of the bottom frame 44 so as to face each other. In the upper chassis 23U, a boss (not shown) protruding from the lower surface of the bottom frame 44 is fitted to a boss 49 provided on the upper surface of the chassis bottom wall 33 of the lower chassis 23D. Boss 49 on lower chassis 23D side
Are screwed together so as to be integrally connected to the lower chassis 23D so as to form a certain space S1 therebetween. As shown in FIG.
The base 24 is pivotally supported between the pivot shaft P about the pivot axis P therebetween.

(Base) As shown in FIGS. 9 to 11,
The base 24 is formed in a shallow box shape which is closed by the fitting of the upper cover plate 52, and has mountain-shaped bracket portions 53 and 54 standing from right and left sides thereof. Left and right brackets 53
54, a hollow support shaft portion 55 is protruded outward from each upper end,
The bases 24 are pivotally connected to the drive chassis 23 so as to be able to swing back and forth by inserting the support shaft portions 55 into shaft holes 56 opened at the upper ends of the side frames 45 and 46 of the drive chassis 23. . At this time, a pair of upper and lower engaging projections 57 are provided on the outer periphery of the support shaft portion 55, and a pair of front and rear notches 59 are provided on the inner periphery of the shaft hole 56, and the base 24 is temporarily turned to the horizontal position to temporarily support the support shaft portion 55. Of the shaft hole 56 is aligned with the notch 59 of the shaft hole 56. Thereafter, by rotating the base 24 by 90 degrees, the engagement protrusion 57 is engaged with the shaft hole 56, and by this engagement, the support shaft portion 55 can be formed without using a special screw for pivoting. It is pivotally connected simply and securely so as not to fall out of the shaft hole 56. The bottom of the base 24 is formed as a convex circular surface 61 corresponding to the circular concave surface 43 of the drive chassis 23. A slight gap is formed between the convex arc surface 61 of the base 24 and the arc concave surface 43 of the drive chassis 23 to reduce the swing resistance of the base 24. Base 2
4, as described later, an engagement lock mechanism 63 between the vibrator 62 of the drive system of the reciprocating inner blade 30 and the outer blade holder 29.
(See FIG. 10).

(Rotary Inner Blade Drive System) In FIGS. 5 and 8, each side frame 45.4 of the drive chassis 23 is shown.
Caps 64 and 65 are fitted and fixed to the outer side of 6. A space S between the left side frame 45 and the cap 64
2 and the inside of this space S2 and the upper chassis 23
A first drive transmission unit 66 for reducing the rotation of the motor 35 and transmitting the rotation to the inner rotary blade 26 over the internal space S1 between the U and the lower chassis 23D is provided.

FIG. 8 and FIG.
6 is shown. The drive transmission means 66 includes a first transmission gear G1 fixed to the output shaft 37 of the motor 35, a second transmission gear G2 meshing with the first transmission gear G1, a third transmission gear G3 integrally connected to the second transmission gear G2, The fourth transmission gear G4 that meshes with the third transmission gear G3, the fifth transmission gear G5 that is a face gear integrally formed on the upper surface of the fourth transmission gear G4, and the sixth transmission gear that meshes orthogonally with the fifth transmission gear G5. G6, 6th
A seventh transmission gear G7 integrally connected to the transmission gear G6;
An eighth transmission gear G8 meshing with the transmission gear G7, a ninth transmission gear G9 meshing with the eighth transmission gear G8, and a ninth transmission gear G9
And a final transmission gear G10 fixed in parallel on the coaxial 67
It is composed of The shaft 67 having the final transmission gear G10 and the ninth transmission gear G9 fixed to both ends serves as the pivot axis P of the shaving blade unit 3, which is passed through the center hole of the support shaft portion 55 of the base 24. . The motor 35 is used not only as a drive source for the rotary inner blade 26 but also as a drive source for the movable comb blade 30 and the shaving unit 12. At that time, the eccentric pin 69 is fixed above the first transmission gear G1 on the output shaft 37 of the motor 35,
This output is transmitted to the movable comb blade 30 via the second drive transmission means 68 as described later. Further, an eccentric cam 70 is fixed below the first transmission gear G1 on the output shaft 37 of the motor 35, and the output of the eccentric cam 70 is sharpened.
2

(Shaving Blade Unit) As shown in FIG. 16, the shaving blade unit 3 swings the swingable base 24 and a pair of front and rear cylindrical inner rotating blades 26 for finishing shaving. Inner blade holder 25 supported in parallel with the dynamic axis P in parallel
An outer blade holder 29 in which two front and rear outer blades 27 formed in a mesh shape are stretched in an arch shape; and a front and rear outer blade 27.
It comprises a movable comb blade 30 and a fixed comb blade 31 for rough shaving, which are arranged in parallel and adjacent to each other between 27. In this way, the front and rear outer blades 27 and the rotating inner blades 26 and the fixed comb blade 31 and the movable comb blade 30 arranged adjacently in the middle form a three-blade structure, so You can shave deeply, especially curly or long hair (unshaved hair)
It is also possible to finish shaving with the outer blade 27 and the rotating inner blade 26 while shaving with the fixed comb blade 31 and the movable comb blade 30. At this time, the shaving blade unit 3 swings about the axis P of the final transmission gear G10 so that the shaving blade unit 3 can easily follow the difficult-to-shave portions such as the unevenness of the face and the lower jaw. Can be.

(Inner Blade Holder) As shown in FIG. 12, the inner blade holder 25 has side walls 73 and 74 erected from right and left ends of a holder bottom wall 72 forming a flat lint receiving surface 71. The rotating inner blade 26.2 between the left and right side walls 73 and 74.
6 are supported in parallel via bearings M and M, and a space is formed between the inner rotary blades 26 and the lint receiving surface 71 so that a cleaning brush can be inserted from the front and rear. Further, an input gear 78 integrated with a left end of each rotary inner blade 26 via a shaft 75 is provided so as to be located outside the left side wall 73 (see FIGS. 14 and 15). Cover bodies 77, 77 are fitted and connected to the outside of each of the left and right side walls 73, 74.

Referring to FIGS. 13 and 14, a pair of front and rear L-shaped members which can be engaged from above with the right side bracket portion 54 of the base 24 as a guide portion are provided on the outer surface of the right side wall 74 of the inner blade holder 25. Forming ribs 90 and 91 are formed. Further, the cover body 77 fitted to the left and right side walls 73 and 74.
The inner wall surfaces of the openings 79 of the 77 also fit along the side surfaces of the left and right bracket portions 53 and 54 as guide portions when the inner blade holder 25 is mounted on the base 24. The engagement ribs 90 and 91 are engaged with the right bracket 54 and the cover 7 is attached to the side surfaces of the left and right brackets 53 and 54.
The state in which the inner blade holder 25 is positioned with respect to the base 24 by fitting the openings 79
That is, the shaft center of each rotary inner blade 26 is assembled in a state where it is located at a fixed distance from the swing shaft center P which is the shaft center of the final transmission gear G10.

(Outer blade holder) As shown in FIG. 18, the outer blade holder 29 has front and rear wall portions 94 and 95 and left and right side walls 96.9.
And left and right side walls 96.9.
7 is an inner / outer double wall 96a / 96b / 97a / 97, respectively.
b. A pair of front and rear first notches 99 is formed in each of the inner walls 96a and 97a.
When the outer blade holder 29 is fitted into the inner blade holder 25 and the base 24 from above, and mounted.
7a is provided to avoid abutting interference with shafts 75 at both left and right ends of each rotary inner blade 26. Each outer wall 96b / 97b
In mounting the outer blade holder 29, the base 2
Notch 10 to be fitted to the brackets 53 and 54 of No. 4
0 is formed.

Pins 103 for caulking and welding the front and rear end pieces 101 and 102 for extending the outer blade shown in FIG. 17 are provided on the inner surfaces of the front and rear walls 94 and 95 of the outer blade holder 29. Each inner wall 96a in the left and right side walls 96 and 97
A longitudinal groove 105 that engages and supports a central end piece 104 for extending the outer blade from the left and right at an intermediate portion between the front and rear of the inner surface of 97a.
Is formed. Each end piece 101, 102, 104
Is formed of plastic, and as shown in FIG. 18, one end of the outer blade 27 on the upper side in the inner blade rotation direction is
It is fixed by caulking and welding to fixing pins 104a and 101a projecting from the central end piece 104 and the front end piece 101, respectively. The other end of the outer blade 27 on the lower side in the direction of rotation of the inner blade is protruded from elastic arms 102 b and 104 b integrally formed with the rear end piece 102 and the central end piece 104 so as to be elastically displaceable in the vertical direction. By being caulked and welded to 102c and 104c via the auxiliary spring 205, they are attached in a tensioned state.

When one end of the outer blade 27 on the upper side in the rotation direction of the inner blade is fixed and the other end of the outer blade 27 on the lower side in the rotation direction of the inner blade is pulled in this manner, each outer blade 27 Is pulled toward the lower side in the inner blade rotation direction due to the sliding contact resistance of
The loosening of the outer blade 27 on the lower side in the rotation direction is suppressed well, and the rotating inner blade 2 of the outer blade 27 is always prevented.
6, and the sharpness can be improved. In addition, a comb 2 for introducing a beard onto the rear outer blade 27 on the outer surface of the rear wall portion 95 of the outer blade holder 29 while raising the beard.
04 is formed.

(Fixed / movable comb blade) Front and rear outer blades 27.2
7 above the central end piece 104 between
0 and the fixed comb blade 31 are assembled. These comb blades 30 and 31 are shown in FIGS. The movable comb blade 30 is formed in a U-shape in cross section, and the front and rear blade plates 106.1
The comb-like blade 109 and the slit 108 are alternately arranged in the left-right direction at the upper end of the joint 07. This movable comb blade 30
In the center between the front and rear blade plates 106 and 107, a spring member 110 such as a leaf spring is held at an upper end, and a bifurcated portion 111 is
The drive piece 111 having a is pin-connected. On the other hand,
The fixed comb blade 31 is formed in a U-shaped cross section corresponding to the movable comb blade 30, and the left and right comb blades 114 and the slit 118 are arranged in two front and rear rows at the upper end of the connection between the front and rear blade plates 112 and 113. They are arranged alternately in the direction. This fixed comb blade 31
The movable comb blade 30 is fitted together with the spring member 110 and the drive piece 111 between the front and rear blade plates 112 and 113, and then the left and right freedom of the spring member 110 is set between the front and rear blade plates 112 and 113 of the fixed comb blade 31. The outer blade piece 115 that receives the end is pin-connected. The comb blade 109 of the movable comb blade 30 comes into close contact with the inner surface of the comb blade 114 of the fixed comb blade 31 by the spring action of the spring member 110.

As shown in FIG. 5, the movable comb blade 30 and the fixed comb blade 31 which are integrally combined in advance as described above are combined with the outer blade piece 1 protruding from the left and right ends of the fixed comb blade 31.
Fifteen projections 115a are attached to the left and right inner walls 9 of the outer blade holder 29.
By being vertically movably engaged with and supported by a vertically elongated groove 116 provided above the vertically elongated groove 105 on the inner surface of 6a / 97a, it is assembled on the central end piece 104. At this time, a spring member 117 is interposed between the left and right outer blade pieces 115 and the central end piece 104, and the movable comb blade 30 is constantly urged up together with the fixed comb blade 31 by the spring action of the spring member 117. . Thus, the fixed comb blade 31 gently follows the skin.

(Movable Comb Blade Drive System) Next, the second drive transmitting means 68 for driving the movable comb blade 30 will be described with reference to FIGS. This is inside the base 24,
A vibrator 62 for converting and transmitting the rotation of the eccentric pin 69 of the output shaft 37 of the motor 35 into the reciprocating left and right movement of the movable comb blade 30
Built-in. The vibrator 62 is a plastic molded product as a whole, and includes a vibrator main body 121 in which a groove 120 is formed in the lower central protrusion 62 a in the front-rear direction, and a drive shaft 122 projecting upward from the center of the upper surface of the vibrator main body 121. , And a thin portion 123 integrally formed at the left and right ends of the vibrator main body 121. The vibrator 62 uses the lower central protrusion 62a of the vibrator 62 as an opening 244 at the bottom center of the base 24 (see FIG. 6).
And the end portions 123 of the left and right thin portions 123.
The hole 123b provided at the position a is press-fitted to a pin 241 projecting from the inner surface of the base 24. At this time, the drive shaft 122 of the vibrator 62 passes through the center opening 52a of the upper lid plate 52 for closing the base 24, and then further passes through the center opening 72a of the holder bottom wall 72 of the inner blade holder 25. And then project upward. The protruding upper end of the drive shaft 122 has a notch 104a provided in the central end piece 104 as shown in FIG.
After that, the movable comb blade 30 is engaged with the forked portion 111a of the drive piece 111. The eccentric pin 69 is engaged with the groove 120 of the lower central protrusion 62 a of the vibrator main body 121. The central opening 52a of the upper lid plate 52 and the drive shaft 122
Is closed by a flexible bristle cover 124.

At that time, by driving the motor 35,
The vibrator 62 linearly reciprocates right and left through engagement with the eccentric pin 69, and the movable comb blade 30 slides on the inner surface of the fixed comb blade 31 in the left and right direction. As described above, the drive transmission mechanism 68 of the movable comb blade 30 drives the vibrator 62 directly by the eccentric pin 69, whereas the rotary inner blade 26 can be arbitrarily decelerated via the drive transmission means 66. is there. Therefore,
Even when the common motor 35 is used as a drive source, the movable comb blade 30
And the rotary inner blade 26 can be driven at optimum speeds. For example, the movable comb blade 30 has a rotation speed (frequency) of 7000 to 8000 rpm due to its importance.
The rotation inner blade 26 is set at 3000 to 4000 rpm, which is slower than that when the rotation torque is regarded as important. By the way,
The oscillating range of the base 24 is such that the eccentric pin 69 faces the base 24 where the front and rear ends of the groove 120 of the vibrator 62 face.
It is regulated by hitting the front and rear end walls (see FIG. 6) inside the opening 244 at the bottom of the.

(Engagement Lock Mechanism of Outer Blade Holder) The structure of the engagement lock mechanism 63 of the outer blade holder 29 is shown in FIGS. A detaching plate 125 is assembled inside the base 24 so as to be located below the vibrator 62.
The removal plate 125 is a plastic molding as a whole, and has left and right side plate portions 127 each having two locking claws 126.
129, and a frame plate portion 130 for integrally connecting the left and right side plate portions 127. A pressed part 131 is provided between the front and rear locking claws 126 on the outer surface of the right side plate part 129. The frame plate 130 is provided with the vibrator 62.
Hole 13 for avoiding interference with lower surface center convex portion 62a
2, the front and rear frame portions 133 and 134
And left and right frame portions 135 and 136. Right side plate part 129
The right frame portion 136 which is rigidly connected to the main body is formed in a thick plate shape having a wide front and rear width. Left frame part 1 that is continuous with left side plate part 127
35 is formed with a double mountain-shaped portion 139 having a pair of front and rear curved portions 139a and 139b connected to the front and rear frame portions 133 and 134 via a thin portion 137. The curved part 13
An intermediate portion between 9a and 139b and a central portion in the front-rear direction of the left side plate portion 127 are connected by a rod portion 140. Curved part 139a
One piece 139c of the side connected to the rod portion 140 of the 139b.
139d is also formed in a thin shape. A spring mounting groove 144 is recessed on each lower surface of the rod portion 140 and the right frame portion 136.

The detaching plate 125 is slidably mounted in the base 24 so as to be slidable in the left-right direction. At this time, the openings 141 provided at the front and rear of the bases 24 of the left and right brackets 53 and 54 are provided. The tip of the claw is projected outside through a locking claw 126, and the pressed portion 131 is passed through an opening 142 provided at the center of the base of the right bracket portion 54 in the front and rear direction, and protrudes from the inside left side of the base 24. The curved portions 139a of the double-shaped portion 139 are attached to the front and rear ribs 143 and 143.
・ Abut 139b. Rod part 140 and right frame part 1
A return spring member 146 is interposed between a spring mounting groove 144 provided on each lower surface of the base 36 and a spring receiving protrusion 145 protruding from the left and right of the inner bottom surface of the base 24. The pair of left and right return spring members 146 constantly urge the removal plate 125 so that the left and right locking claws 126 protrude from the respective openings 141.

As shown in FIG. 16, the opening 14 of the base 24 is
The protruding ends of the locking claws 126 protruding from the outer blade holder 29 are engaged with engagement recesses 147 formed in the lower inner surfaces of the left and right outer walls 96b and 97b of the outer blade holder 29. It is mounted and fixed at a predetermined position with respect to the base 24. In FIG. 19, when the pressed portion 131 is pressed inward (leftward) of the base 24, the removal plate 125 is moved to the base 24.
Under the guidance of the front and rear walls 242 and 243 of the left,
At the same time as the locking claws 126 on both sides of the right side plate portion 129 retreat inside the base 24, the curved portions 139 of the double mountain-shaped portion 139 are formed.
a. 139b is elastically deformed by the thin portion 137 and the thin pieces 139c and 139d while being pressed by the front and rear frame portions 133 and 134 (see the two-dot chain line in FIG. 19) while being pressed against the rib 143. The part 140 is the left side plate part 1
27 and the locking claws 126 are pulled inward of the base 24. As a result, the engagement lock of the outer blade holder 29 is released. With this release, the front and rear wall portions 94.9 of the outer blade holder 29
5 can be removed above the base 24.
At this time, even when the front and rear wall portions 94 and 95 are dented and deformed inward, they can be removed regardless of the deformation. In addition, the outer blade holder 29 grips the front and rear wall portions 94 and 95,
Left and right side frames 45 and 46, cap 64
Even if 65 is present, it can be removed without difficulty.

As shown in FIGS. 5 and 9, the lock release button 149 for externally operating the pressed portion 131 of the removal plate 125 is provided in the through holes 150 and 151 formed in the cap 65 and the right side frame 46. The lock release button 149 is inserted into the pressed portion 13
1 and are arranged opposite to each other. Therefore, the lock release button 1
By pushing the 49 in, the removal plate 125 is pressed and displaced in the unlocking direction against the return spring member 146 as described above. When the outer blade holder 29 is mounted, the engagement lock mechanism 63 is automatically locked simply by pushing the outer blade holder 29 into the base 24 from above.

As shown in FIG. 5, the detaching plate 125 is assembled inside the base 24 as described above, and the vibrator 62 is disposed above the detaching plate 125, and both ends of the vibrator 62 are disposed as described above. The portion 123a is a pin 2 on the base 24 side.
41 and 241 are fitted and fixed. Therefore, the removal plate 125
With the vibrator 62, it is possible to suppress the rise of the spring from the base 24 by the return spring member 146. In this manner, in the temporary assembling stage immediately after the detaching plate 125 is attached to the base 24 and the vibrator 62 is attached thereto, the detaching plate 125 can be prevented from being lifted up by the return spring member 146. At this stage, it is possible to check whether or not the operation of the removal plate 125 is good. At this stage, even if there is a malfunction of the detaching plate 125, it can be quickly and easily repaired without any trouble in disassembling. Further, since the temporary fixing state for preventing the floating phenomenon of the detaching plate 125 is obtained, the assembling work such as the mounting of the upper cover plate 52 to the base 24 can be smoothly performed thereafter.

(Neutral Return Mechanism) The cutting head 2 has a mechanism for automatically urging the cutting head 2 to return to the neutral position when not in use. As shown in FIGS. 9 and 20, this mechanism removes the coil portion 172a of the torsion coil type return spring 172 from the boss 171 provided around the shaft hole 56 on the outer surface of the side frame 46 of the drive chassis 23. The two arc-shaped legs 172b, which are fitted and mounted and extend from both ends of the coil portion 172a, pass through the outside of a pair of pins 173 provided below the boss 171 and are opened below the pin 173. Face the hole 174. On the other hand, a screw hole 54a is provided on the outer surface of the bracket portion 54 of the base 24, and a pin 175 with a flange 175a is fastened and fixed to the screw hole 54a with a screw 170. The pin 175 is inserted into the arc hole 174, and the flange 175a is inserted. It protrudes outside the arc hole 174. Thus, the lower ends of both feet 172b and 172b of the return spring 172 are hung on the front and rear end walls of the pin 175. As a result, the shaving blade unit 3 swings back and forth in response to the skin pressure against the elasticity of the return spring 172, but returns to the neutral position due to the elasticity of the return spring 172 when released from the skin pressure. In particular, when the shaving blade unit 3 swings back and forth due to the pressing of the skin, the elastic restoring force of the return spring 172 acts on the shaving blade unit 3, so that the shaving blade unit 3 is always in close contact with the skin. Biased in the direction.

The swing angle of the shaving blade unit 3 is regulated by the front and rear ends of the flange 175a of the pin 173 abutting on the front and rear end walls 46a formed along the outer periphery of the side frame 46. You. This corresponds to the eccentric pin 69 described above.
Are the front and rear end walls in the opening 244 at the bottom of the base 24 (see FIG. 6).
It is matched with hitting. Therefore, the action of restricting the swing angle of the shaving blade unit 3 includes the contact action of these pins 173 on the end wall 46a of the flange 175a and the eccentric pin 6
9 and the abutting action on the front and rear end walls in the opening 244.

(Head Lock Mechanism) When shaving under the nose or the like, it is easier to use the razor blade unit 3 so as not to swing, so that the head for fixing the razor unit 3 for use. Equipped with a lock mechanism. This head lock mechanism is realized in combination with the neutral return mechanism. As shown in FIG. 9, a head lock pin 176 is provided on the right side of the main body case 1 so as to be slidable up and down, and the head lock pin 176 is moved to the neutral position. By engaging with the notch 177 provided on the lower surface of a certain base 24, the shaving unit 3
Is held in the neutral position.

(Other Embodiments) In the above embodiment, the razor blade unit 3 is provided with two front and rear rotary inner blades 26. However, the razor unit 3 is provided with a single front and rear rotary inner blade 26 and is movable. It may be arranged side by side with the cutting blade 30. Further, the present invention can be similarly applied to a rotary electric shaver in which the fixed and movable comb blades 31 and 30 are omitted and only the rotary inner blade 26 is provided. In this case, as described above, the drive transmission means 68 including the eccentric pins 69 and the like which share the regulation of the swing angle of the shaving blade unit 3 is inevitably omitted. The movement angle is restricted only by bringing the flange 175a of the pin 173 of the neutral return mechanism shown in FIG. 20 into contact with the end wall 46a of the side frame 46 of the drive chassis 23.

In the engagement lock mechanism 63 of the outer blade holder 29, in the above embodiment, a projection is formed on the outer surface of the right side plate portion 129 of the removal plate 125, and the projection is used as the pressed portion 131. It is also possible to directly press the outer surface of the right side plate portion 129 with the lock release button 149 without providing a projection. Also, the detaching plate 125 can be assembled in a reversed left and right direction. In this case, the pressed portion 131 is disposed on the left side frame 45, and the drive transmission means 66 of the rotary inner blade 26 is disposed on the right side frame 46. Further, only one locking claw 126 may be provided on each of the left and right side plate portions 127 and 129. Engagement lock mechanism 63 of outer blade holder 29
Can be similarly applied to a reciprocating electric shaver in addition to the rotary electric shaver.

[0041]

According to the electric shaver of the present invention, when the outer blade holder 29 is detached by grasping the front and rear wall portions 94 and 95 by hand, the front and rear wall portions 94 and 95 are depressed inward. Regardless of this deformation, the locking claw 126 can be smoothly removed from the engagement recess 147 by pressing the removal plate 125 from the outside of the main body case 1.

The engagement lock mechanism 63 of the outer blade holder 29 only needs to assemble the two members of the removal plate 125 and the return spring member 146, and can be assembled efficiently with a small number of man-hours.

A drive transmitting means 66 for transmitting to the inner rotary blade 26 is provided to one of the left and right side frames 45 and 46.
By disposing the pressed portions 131 on the other side, the outer blade holder 29 can be easily and quickly removed by pressing the removal plate 125 without any hindrance to the drive transmission of the rotary inner blade 26.

[Brief description of the drawings]

FIG. 1 is an overall front view of an electric shaver according to the present invention.

FIG. 2 is an overall side view.

FIG. 3 is an overall exploded perspective view.

FIG. 4 is a vertical sectional front view of a cutting head unit.

FIG. 5 is a vertical sectional front view of a cutting head portion in a state where an outer blade holder is removed.

FIG. 6 is a vertical sectional side view of a cutting head unit.

FIG. 7 is a perspective view showing a cutting head portion and an upper portion of a main body case in a separated state.

FIG. 8 is an exploded perspective view of the drive chassis.

FIG. 9 is a perspective view showing the drive chassis and the base in a separated state.

FIG. 10 is an exploded perspective view of a base.

FIG. 11 is a perspective view of a part of a base.

FIG. 12 is a perspective view showing the base and the inner blade holder in a separated state.

FIG. 13 is a perspective view showing a state where a base and an inner blade holder are set.

FIG. 14 is an exploded perspective view of the inner blade holder.

FIG. 15 is a side view showing a drive mechanism of the rotary inner blade.

FIG. 16 is a perspective view showing the inner blade holder and the outer blade holder set on the base in a separated state.

FIG. 17 is a vertical sectional side view of the outer blade holder.

FIG. 18 is an exploded perspective view of the outer blade holder.

FIG. 19 is a plan view showing an engagement lock mechanism of the outer blade holder.

FIG. 20 is a side view showing a neutral return mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Cutting head 3 Shaving blade unit 23 Drive chassis 26 Rotating inner blade 27 Outer blade 29 Outer blade holder 35 Motor 45/46 Side frame 63 Engagement lock mechanism 66 Drive transmission means 75 Axis 94/95 Front / rear wall 96 / 97 left and right side walls 125 removal plate 126 locking claw 127 ・ 129 left right side plate part 130 frame plate part 131 pressed part 133 ・ 134 front and rear frame part 135 ・ 136 left and right frame part 137 thin part 143 rib 146 return spring member 147 engagement concave part

Claims (2)

[Claims] 1. Front and rear wall portions 94 and 95 and left and right side walls 96.9.
The outer blade holder 29, which is formed in a hollow shape with the outer blade 27 and holds the outer blade 27 in an arch shape, is detachably attached to the upper portion of the main body case 1 by grasping the front and rear wall portions 94 and 95. An engagement lock mechanism 63 for the outer blade holder 29 is provided on the upper part of the main body case 1, and engagement recesses 147 are provided on the inner surfaces of the left and right side walls 96 and 97 of the outer blade holder 29. The locking mechanism 63 has a detachable plate 125 incorporated inside the upper part of the main body case 1 so as to be slidable in the left-right direction. The detachable plate 125 engages with the engaging recess 147 in a detachable manner. Left and right side plate portions 127 and 129 integrally protruding from the left and right outer sides, respectively, and the frame plate portion 13 in which the left and right side plate portions 127 and 129 are integrally connected.
And a pressed part 131 to be pressed from outside to inside of the main body case 1 on one of the left side plate portion 127 and the right side plate portion 129, The plate portion 130 includes front and rear frame portions 133 and 134 and left and right frame portions 135 and 136 integrally connected to the left and right side plate portions 127 and 129, respectively. A return spring member 14 which always urges the upper part of the main body case 1 outward.
The left frame 135 or the right frame 136 on the side not provided with the pressed portion 131 has a thin portion 137 and is formed to be elastically deformable. Part 135 or right frame part 136
Is pressed against the rib 143 provided inside the upper part of the main body case 1 as the pressed part 131 is pressed into the upper part of the main body case 1, and is elastically deformed by this abutting action to be deformed. The electric shaver is characterized in that the left frame plate portion 127 or the right frame plate portion 129 on the side not provided with is provided to be drawn inward in the upper part of the main body case 1. 2. Left and right side frames 45 and 46 are provided on the upper part of the main body case 1 so as to face each other.
9 is provided so as to be freely inserted and removed, and a cylindrical rotary inner blade 26 is provided between the side frames 45 and 46 for slidingly rotating the inner surface of the outer blade 27 around an axis 75. 2. The electric device according to claim 1, wherein the drive transmission means for transmitting the rotation of the motor in the main body case to the rotary inner blade is provided on one of the first and second portions, and the pressed portion is provided on the other. Razor.