JPH11128562A - Electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce in quantity at low-cost and reduce a rattle and noise of a drive mechanism which reciprocates a inner cutter by simplifying the drive mechanism. SOLUTION: An electric razor has an outer cutter, an inner cutter that reciprocates at inside of the outer cutter, and a drive mechanism that reciprocates the inner cutter. The drive mechanism has a vibrating rod 19 which connects with the inner cutter at the edge to reciprocate it, a shaking table 17 which connects with the vibrating rod 19 and is mounted with a case to be able to reciprocate, and the reciprocating motion mechanism which reciprocates the shaking table 17. The vibrating rod 19, the edge of it is inserted into a driving hole 3D on the inner cutter movably to the axial direction, is connected with the inner cutter. A cutter press spring 25, which reciprocates the inner cutter to the outer cutter resiliently, is inserted to the vibrating rod 19. It presses the inner cutter to the outer cutter with the cutter press spring 25, reciprocates the inner cutter at the edge of the vibrating rod 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shaver for reciprocating an inner blade inside an outer blade.

[0002]

2. Description of the Related Art FIGS. 1 and 2 are exploded perspective views of a conventional electric shaver having a reciprocating inner blade. The electric razor in these figures connects the inner blade 29 to the upper and lower rods 31 of the inner blade base 28. The inner blade base 28 is attached to the blade holder 32 via resilient arms 34 provided at both ends so as to be able to reciprocate. The blade holder 32 is
It is attached to the outer cutter frame 7 so as to be detachable, and is attached to the razor body 27 via the outer cutter frame 7. While being mounted on the razor body 27, the inner blade base 28 is connected to the vibration table 17 built in the razor body 27 and reciprocates. That is, the electric razor of this structure is the motor 1
8, the shaking table 17 is reciprocated, and the shaking table 17
8 is reciprocated, and the inner cutter 30 is reciprocated by the inner cutter base 28. That is, the vibration table 17 reciprocated by the motor 18 causes the inner blade 30 to reciprocate via the inner blade table 28.

The inner cutter 30 needs to reciprocate while being elastically pressed against the inner surface of the outer cutter 29. A beard projecting from the shaving hole of the outer blade 29 to the inner surface is used to reciprocate the inner blade 30.
This is to ensure cutting. In order to reciprocate the inner blade 30 on the inner surface of the outer blade 29, the upper and lower rods 3 are attached to the inner blade base 28.
1 is provided. The upper and lower rods 31 are elastically pushed up by a built-in pressing spring 33 as shown in an exploded perspective view of FIG. The pressing spring 33 is inserted into the inside of the upper and lower rods 31, and pushes up and down the upper and lower rods 31 elastically.

[0004] In this specification, the vertical direction is specified by a posture in which an electric shaver is set up vertically as shown in FIG.

[0005] In order to connect the upper and lower rods 31 to the inner cutter 30, the inner cutter 30 is structured so that the inside of the inner cutter holder 30A can be connected to the upper and lower rods 31. The inner blade 30 shown in the perspective view of FIG.
The connection support 30B is integrally formed and provided on the inner surface of.
Since the connecting support 30B is inserted and connected inside the upper and lower rods 31, the outer width is designed to be substantially equal to the inner width of the upper and lower rods 31.

Further, the inner blade holder 30A is formed with a locking portion 30C protruding from the inner surface so as to be connected to the upper and lower rods 31 so as not to come off. The locking portion 30C is located at the center of the inner blade holder 30A formed in the shape of a parallel plate and provided integrally with the lower end thereof. Locking part 30
A, when the inner blade 30 is connected to the upper and lower rods 31, is guided by the locking window 31 </ b> A of the upper and lower rods 31 to prevent the inner blades 30 from coming off from the upper and lower rods 31. When the connecting column 30B of the inner blade 30 is inserted and connected to the upper and lower rods 31, the inner blade holder 30A formed in a parallel plate shape is elastically expanded, and the locking portion 30C is engaged with the upper and lower rods 31. Guided to the closing window 31A. When the locking portion 30C is guided to the locking window 31A, the interval between the inner blade holders 30A is reduced, and the locking portion 30C is hooked on the locking window 31A.

As shown in FIG. 4, the inner blade base 28 has a drive pin 28A projecting downward so as to be connected to the vibration table 17 of the razor body 27. The drive pin 28A is inserted into a shaft hole provided at the center of the vibration table 17 without any gap,
The vibration table 17 is connected. The upper portion of the shaft hole is formed in a tapered shape so that the shaft can be guided around the drive pin 28A.

[0008]

In the electric razor having the above structure, the inner cutter is connected to the upper and lower rods of the inner cutter base, and is mounted so as to be movable up and down by the upper and lower rods. In the electric razor of this structure, it is necessary to connect the inner blade to the vibrating table via two parts, the upper and lower rods and the inner blade table. Therefore, the clearance between the inner blade and the upper and lower rods, the upper and lower rods and the inner blade table, and the clearance between the inner blade table and the vibrating table reduce the stroke for reciprocating the inner blade, and this clearance causes uncomfortable noise and rattling. Become.

Further, this structure requires a complicated structure for connecting the inner blade to the vibrating table, and requires many parts. In addition, if the machining system for each part is low, clearance will be created and the above-mentioned adverse effects will occur, so a high system is required for parts, the cost of parts will increase, the assembly will take time, and the manufacturing cost will increase. There is a disadvantage of becoming expensive.

Furthermore, the electric razor of this structure is
There is also a disadvantage that it is difficult to increase the stroke amount of the upper and lower rods because the upper and lower rods are stroked up and down. Further, when the stroke of the upper and lower rods is increased, this portion becomes higher, and the entire length of the electric shaver becomes longer.

The present invention has been developed to solve such a drawback. An important object of the present invention is to provide an electric shaver that simplifies a drive mechanism for reciprocating the inner blade, can be mass-produced at low cost, and reduces rattling and noise of the mechanism for driving the reciprocating inner blade. It is in.

Another important object of the present invention is to provide an electric shaver that can increase the stroke of the inner blade with a simple mechanism.

[0013]

The electric razor according to the present invention comprises an outer blade, an inner blade reciprocating inside the outer blade, and a drive mechanism for reciprocating the inner blade. Furthermore, the driving mechanism of the electric razor according to the first aspect of the present invention connects the inner blade to the tip to reciprocate the vibration rod 19, and connects the vibration rod 19 to the reciprocating motion. A vibration table 17 mounted on a case, and a reciprocating mechanism for reciprocating the vibration table 17. The vibrating rod 19 has its tip inserted into the drive hole 3D of the inner blade so as to be movable in the axial direction and connected to the inner blade. Further, a blade pressure spring 25 that elastically reciprocates the inner blade to the outer blade is inserted into the vibration rod 19. The blade pressure spring 25 elastically presses the inner blade against the outer blade, and the inner blade is reciprocated at the tip of the vibration rod 19.

The electric shaver having this structure is composed of a vibrating rod 1
9 is connected to the inner blade so that it can move in the axial direction. Therefore, unlike the related art, it is not necessary to provide a member for driving the inner blade in a structure that can move up and down like the upper and lower rods 31. Further, a blade pressure spring 25 is attached to the vibrating rod 19.
And the inner blade is pressed against the outer blade by the blade pressure spring 25. The blade pressure spring 25 elastically presses the inner blade, which is connected to the vibrating rod 19 movably in the axial direction, against the inner surface of the outer blade. Therefore, the blade pressure spring 25
Is mounted with a simple structure, and the inner blade can be pressed against the outer blade with a large stroke by a simple mechanism including the vibration rod 19 and the blade pressure spring 25.

In the electric shaver according to a second aspect of the present invention, the end of the vibrating rod 19 is thickened to provide a flange portion 19A.
The flange 19A is inserted into the driving hole 3D of the inner blade and reciprocates the inner blade. Further, at the tip of the vibrating rod 19,
The retaining ring 26 is inserted. The retaining ring 26 is inserted into the vibrating rod 19 so as not to come off at the flange 19A. The retaining ring 26 is inserted into the vibrating rod 19 so as not to come off the blade pressure spring 25.

In the electric razor according to a third aspect of the present invention, the inner blade is elastically pressed against the inner surface of the outer blade by a retaining ring 26 pressed by a blade pressure spring 25.

The retaining ring 26 of the electric razor according to the fourth aspect of the present invention has an elastic holding piece 26A that elastically deforms in a direction to make the center hole thin. The retaining ring 26 can be inserted into the vibrating rod 19 by expanding the elastic holding piece 26A, and in the inserted state, the elastic holding piece 26A is connected to the vibrating rod 19 so as not to be caught by the flange 19A.

The retaining ring 26 of the electric razor according to the fifth aspect of the present invention comprises a lower ring portion 26B and a ring portion 2B.
A plurality of elastic holding pieces 26A are provided on the periphery of 6B so as to extend upward from the ring portion 26B. The elastic holding piece 26A has an inner shape of the ring portion 26B larger than the outer shape of the flange portion 19A and an inner shape of a center hole formed by the plurality of elastic holding pieces 26A smaller than the outer shape of the flange portion 19A. ing.

In the electric shaver according to the sixth aspect of the present invention, the connecting portion 3 for connecting the vibration rod 19 to the inner blade holder of the inner blade.
C is provided. The connecting portion 3C is formed in a tapered shape whose width increases downward, and the retaining ring 26 is elastically pressed by the tapered portion, thereby pressing the inner blade against the inner surface of the outer blade.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. However, the following examples illustrate an electric shaver for embodying the technical idea of the present invention, and the present invention does not specify the structure of the electric shaver as follows.

Further, in this specification, in order to make it easier to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”.
However, the members described in the claims are not limited to the members of the embodiments.

The electric razor shown in the exploded perspective views of FIGS. 5 and 6 comprises a razor main body 27, an outer cutter frame 7 detachably mounted on the razor main body 27, and an outer cutter frame 7,
An outer blade case 6 detachably mounted on the outer blade case, an inner blade pressed against the inner surface of the outer blade mounted on the outer blade case 6, and a drive mechanism for reciprocating the inner blade.

The electric razor shown in FIG. 5 is connected to a razor body 27 so that the outer cutter frame 7 can be detached. However, the outer blade frame 7 is fixed to the razor body so that it cannot be
Alternatively, this can be formed integrally with the razor body.

The outer cutter case 6 connects four outer cutters in parallel. The four outer blades include two arch outer blades 1 and slit outer blades 2 arranged on both sides of the arch outer blades 1. The arch outer blade 1 fixes the net blade 1A to the plastic outer blade holder 1B in an arched shape. The mesh blade 1A has numerous shaving holes.

The slit outer blade 2 is obtained by fixing a slit outer blade plate 2A to a plastic outer blade holder 2B. The slit outer blade plate 2A is formed by opening a plurality of parallel slits 2a in a metal plate so as to extend in the lateral direction. The slit outer blade plate 2A is formed by bending a metal plate into a rectangular shape having a flat upper surface and extending from the upper surface and an outer corner portion to an outer vertical portion to open a parallel slit 2a.

The arch outer blade 1 and the slit outer blade 2 are elastically independent of each other so that they can enter and exit independently.
Attached to. The arch outer blade 1 and the slit outer blade 2 are elastically pushed out toward the skin by an elastic body such as a spring (not shown).

The outer cutter case 6 has a shape in which end plates 61 at both ends are connected by side plates 62, and the entire shape is formed into a square shape having upper and lower openings. Outer blade case 6
Are integrally formed of plastic. Side plate
62 is provided with the comb 4 on the upper surface.

As shown in FIG. 5, the outer cutter case 6 is detachably mounted on an opening window 7C which is an upper end opening of the outer cutter frame 7. The outer cutter case 6 is attached to a fixed position of the outer cutter frame 7 and connected so as not to come off. The detachment of the outer cutter case 6 from the outer cutter frame 7 is prevented by the hook pieces 6A of the outer cutter case 6 and the hook portions 7A of the outer cutter frame 7. The hook pieces 6A are provided on the end plate 61 as shown in FIG. The hooking portion 7A is provided at a position for guiding the hooking piece 6A in a state where the outer cutter case 6 is attached to a fixed position of the outer cutter frame 7. Hook part 7A in the figure
Are two projections 7a provided to protrude from the inner surface of the outer cutter frame 7. When the outer cutter case 6 is attached to the fixed position of the outer cutter frame 7, the hook 6 </ b> A is hooked on the hook 7 </ b> A, which is a protrusion 7 a provided on the inner surface of the outer cutter frame 7.

The hook pieces 6A are provided so as to protrude from both end surfaces of the outer blade case 6 and extend upward from below. The hook piece 6A is elastically deformed and is inserted into the hook portion 7A of the outer cutter frame 7. The hook piece can be formed integrally with the outer blade case and pushed into the hook portion by the elasticity of the plastic forming the outer blade case. However, preferably, as shown in the sectional view of FIG. A metal plate 6B is provided. Elastic metal plate 6
B elastically presses the hook piece 6A and inserts it into the hook portion 7A.

The hook 6A has a T-shape with a wide upper end. The T-shaped ends 6a are hooked portions 7A of the outer cutter frame 7.
And the outer blade case 6 is locked by the outer blade frame 7.
Linked to

In order to easily insert and connect the outer cutter case 6 to the outer cutter frame 7, both end surfaces of the outer cutter case 6 and the inner surface of the outer cutter frame 7 facing the end surface of the outer cutter case 6 are provided. Outer blade case 6
A guide is provided to guide the in the detaching direction.

The outer cutter case 6 and the outer cutter frame 7 shown in FIG. 7 slide a guide into a guide groove 8 provided on the end face of the outer cutter case 6 and a guide groove 8 provided on the inner surface of the outer cutter frame 7. The guide ridge 9 is moved. The guide groove 8 is provided at the center of the hook piece 6A integrally formed with the outer cutter case 6 so as to extend vertically. The lower end of the guide groove 8 is tapered so that the guide ridge 9 can be smoothly guided.

The guide ridges 9 extend vertically inside the both end surfaces of the outer cutter frame 7 and are provided integrally with the outer cutter frame 7. The entire outer cutter frame 7 is integrally formed of metal or plastic. The guide ridge 9 extends from the hook 7A to the upper end.

Further, the outer blade case 6 shown in FIG. 7 is provided with four outer blades asymmetrically. Outer blade case 6 of this shape
Need to be mounted on the outer cutter frame 7 in a determined posture.
In order to prevent the outer cutter case 6 from being connected to the outer cutter frame 7 in the opposite direction, a stopper mechanism is provided on the outer cutter case 6 and the outer cutter frame 7.

The stopper mechanism is formed by a stopper rib 10 provided on the outer cutter case 6 and a stopper projection 11 provided on the outer cutter frame 7. The stopper rib 10 is provided at a corner of the end surface of the outer cutter case 6 so as to extend vertically. The stopper rib 10 is provided on one side surface of the outer blade case 6, a corner portion approaching the front side surface in FIG. The stopper protrusion 11 protrudes from the inner surface of the corner of the outer cutter frame 7 and is provided at a position where the stopper rib 10 abuts when the outer cutter case 6 is inserted into the outer cutter frame 7 in a reverse orientation.

When the outer cutter case 6 is inserted into the outer cutter frame 7 in the posture shown in FIG. 7, that is, when the outer cutter case 6 is inserted into the outer cutter frame 7 in a normal posture, the stopper rib 10 is provided with a stopper convex. The outer blade case 6 can be inserted and connected to the outer blade frame 7 without colliding with the portion 11. However, the posture opposite to the posture shown in FIG.
If you try to insert it into the outer cutter frame 7 with the posture rotated 0 degrees,
The stopper rib 10 collides with the stopper projection 11. For this reason, the outer cutter case 6 is not inserted into the outer cutter frame 7 in the reverse orientation.

In order to remove the outer cutter case 6 from the outer cutter frame 7,
A detachable knob 12 is provided on the outer cutter frame 7. Detachable knob 1
By pressing 2, the outer cutter case 6 is detached from the outer cutter frame 7. The attachment / detachment knob 12 has an attachment / detachment button 13 for detaching the outer blade frame 7 from the razor body 27 as an integral structure. Detachable knob 12
The button 13 is constituted by a single part. The attachment / detachment knob 12 and the attachment / detachment button 13 are plastic or metal elastic pieces 14 which are elastically deformed.
Is connected to the outer cutter frame 7 and the upper end is attached to and detached from the knob 12,
The lower end is a detachable button 13.

The elastic piece 14 has a plate-like overall shape.
The middle is fixed to the outer cutter frame 7 so that the upper attachment / detachment knob 12 and the lower attachment / detachment button 13 can be elastically deformed. The upper end of the detachable knob 12, which is the upper part of the elastic piece 14, is integrally formed by vertically extending a pressing rod 12A that presses both ends of a T-shaped hooking piece 6A.

Further, the detachable knob 12 is integrally formed with an outer blade button 12B protruding outside the outer blade frame 7. The outer cutter button 12B is inserted so as to be able to enter and exit the through hole 7B of the outer cutter frame 7.

When the outer cutter case 6 is detached from the outer cutter frame 7, as shown by the arrow A in FIGS.
Press B. When the outer blade button 12B is pressed, the pressing rod 12A pushes the hook piece 6A out of the hook portion 7A to release the hooked state of the outer blade case 6 and the outer blade frame 7. In this state, the outer cutter case 6 is pulled out of the outer cutter frame 7 and removed.

The attachment / detachment button 13 is provided on the pressing plate 13 for pushing the elastic projection 16 projecting from the razor body 27.
A and a frame button 13 </ b> B protruding outside the outer cutter frame 7. The elastic projection 16 is elastically pushed out of the razor body 27, so that the elastic projection 16 is hooked by a hooking concave portion 7 </ b> D provided on the inner surface of the outer cutter frame 7 so that the outer cutter frame 7 does not slip out of the razor body 27. Connect to Frame button 13B
Are inserted so as to be able to enter and exit through holes 7E of the outer cutter frame 7 and are exposed outside the outer cutter frame 7.

When removing the outer blade frame 7 from the razor body 27, as shown by the arrow B in FIGS.
Press 3B. When the frame button 13B is pressed, the pressing plate 13A pushes the elastic projection 16 out of the hooking recess 7D,
The elastic projection 16 is no longer locked by the hooking recess 7D of the outer cutter frame 7. Therefore, in this state, the outer cutter frame 7 is detached from the razor body 27.

As shown in FIGS. 11 and 12, the outer cutter case 6 has an inner cutter built in each of the inner surfaces of four outer cutters. The arch outer blade 1 has an arch inner blade 3 built therein, and the slit outer blade 2 has a slit inner blade 5 built therein. The electric shaver of the present invention is characterized in that the vibration rod 19 is inserted into the inner blade so as to be movable in the axial direction, and the inner blade is reciprocated by the vibration rod 19. The shaver of this embodiment is
The vibration rod 19 is inserted and connected to the arch inner blade 3. The slit inner blade 5 can be inserted without inserting the vibration rod 19.
It reciprocates with different mechanisms.

The outer cutter case 6 is structured to be detached from the outer cutter frame 7 in a state where both the inner cutter and the outer cutter are connected. Therefore, the outer blade mounted on the outer blade case 6 has a built-in inner blade so as to reciprocate while sliding along the inner surface. The inner blade is connected to the outer blade so that the inner blade does not come off when the outer blade case 6 is removed.

As shown in FIG. 12, the arch inner blade 3 is manufactured by arranging a plurality of arch metal blades 3A in parallel and inserting them into a plastic inner blade holder 3B.
The arch metal blade 3A is a metal plate, and the upper end is formed in a curved shape so as to contact the inner surface of the arch outer blade 1 that is curved in an arch shape. The arch inner blade 3 is connected to the arch outer blade 1 so that the opening of the outer blade holder is narrowed, for example, so as not to come off.

As shown in FIG. 13, the slit inner blade 5
A slit metal blade 5A having a comb-shaped slit is provided.
The upper surface of the slit metal blade 5A slides on the inner surface of the slit outer blade plate 2A to form the parallel slit 2a of the slit outer blade plate 2A.
Cuts the beard that is lured into. The slit inner blade 5 is mounted inside the slit outer blade 2, and reciprocates on a vibration table.

The slit inner blade 5 can be connected to the slit outer blade 2 by, for example, a structure shown in an exploded perspective view of FIG. The slit inner blade 5 shown in this figure includes a slit metal blade 5A, an inner blade holder 5B made of plastic, and a blade pressure spring 24 which is a leaf spring. Slit metal blade 5
A and the blade pressure spring 24 are laminated and fixed to the inner blade holder 5B. The inner blade holder 5B is formed into a T-shape as a whole, and a slit metal blade 5A is formed at a fixed position on the upper side surface.
And a plurality of protrusions 5D for connecting the blade pressure spring 24 with the protrusions 5D. The slit metal blade 5A is provided with the protrusion 5 of the inner blade holder 5B.
A connection hole 5E is provided at a position where D is inserted.

The blade pressure spring 24 is formed by press-molding a thin elastic metal plate. A connection hole 24A is provided at a position where the protrusion 5D of the inner blade holder 5B is inserted. Is projected. The elastic piece 24B presses the upper surface of the outer blade holder 2B of the slit outer blade 2 to elastically press the slit metal blade 5A against the inner surface of the slit outer blade 2.

The slit inner blade 5 shown in this figure has a slit metal blade 5A and a blade pressure spring 24 on the upper part of the inner blade holder 5B.
Simply insert the connection holes 5E and 24A into the protrusions 5D,
Can be connected to the correct position. In this state, the inner blade holder 5
When the tip of the protrusion 5D of B is heated and crushed, the slit metal blade 5A and the blade pressure spring 24 more reliably engage with the inner blade holder 5B.
Linked to The T-shaped inner blade holder 5B, in which the slit metal blade 5A and the blade pressure spring 24 are connected, inserts the rod portion 5F extending downward into the outer blade holder 2B of the slit outer blade 2 to make the slit outer blade 2 Link.

After the inner blade holder 5B is inserted into the outer blade holder 2B, the slit outer blade plate 2A bent in a U-shape is connected to the outer blade holder 2B, and the slit inner blade 5 is removed.
The slit outer blade 2 is held at a fixed position. Slit metal blade 5
A and inner blade holder 5B connecting blade pressure spring 24
Is made substantially equal to the inner width of the slit outer blade plate 2A, and is held at a fixed position so as not to be tilted inside the slit outer blade 2.

The arch inner blade 3 attached to the outer blade case 6
8 is connected to a vibrating rod 19 protruding from the upper end of the razor body 27 and reciprocated as shown in FIGS. The two vibrating rods 19 are fixed to a vibrating table 17 that is reciprocally mounted on the main body case 15 of the razor main body 27 and reciprocate. The vibrating table 17 is mounted on the main body case 15 so as to be able to reciprocate via elastic arms 17A provided at both ends. The shaking table 17 includes a camshaft 2 fixed to a rotation shaft of a motor 18.
It is reciprocated at 2. The vibration table 17 has a connection slit 17B for connecting the cam shaft 22 in a direction orthogonal to the vibration direction. The rotating camshaft 22 is connected to the connecting slit 17.
By sliding B, the vibration table 17 is reciprocated. The two vibrating tables 17 are connected to the camshafts 22 having phases different from each other by 180 degrees, and are reciprocated in directions opposite to each other.

The vibrating rod 19 is vertically fixedly connected to the vibrating table 17 and protrudes from the razor body 27.
The vibrating rod 19 is exposed to the outside through an opening window 15A provided at the upper end of the main body case 15. The opening window 15A is
In order to prevent shavings and the like from entering the main body case 15, the shavings are closed with a packing rubber 23. Packing rubber 2
Reference numeral 3 connects the outer periphery to the inner periphery of the opening window 15A, and connects the inner periphery to the outer periphery of the vibration rod 19 without any gap. The packing rubber 23 is a flexible rubber-like elastic body that can be freely deformed.
9 and the opening window 15A are closed.

The vibrating rod 19 is a metal rod, and is fixed vertically to the vibrating table 17 as shown in FIG. This vibrating rod 19 has a flange 19A formed with a thick tip,
The blade pressure spring 25 is inserted so as not to come off. At the tip of the blade pressure spring 25, a plastic retaining ring 26 is inserted. The retaining ring 26 is prevented from coming off by the flange 19A, and the retaining ring 26
5 is prevented from falling out of the vibration rod 19.

The retaining ring 26 is similar to the sectional view of FIG.
As shown in the perspective view of FIG. 5, there is an elastic holding piece 26A that elastically deforms in a direction to make the center hole thinner. This retaining ring 2
6 is the elastic clamping piece 2 when inserted into the vibrating rod 19.
6A is expanded. When inserted into the vibrating rod 19, the elastic holding piece 26 </ b> A is hooked on the flange 19 </ b> A of the vibrating rod 19 and is connected to the vibrating rod 19 so as not to come off.

The retaining ring 26 is integrally formed of plastic as a whole, and includes a lower ring portion 26B and a plurality of elastic clamps provided on the periphery of the ring portion 26B so as to extend upward from the ring portion 26B. It consists of a dressing piece 26A. In order to insert the retaining ring 26 into the vibration rod 19, the inner shape of the ring portion 26B is made larger than the outer shape of the flange portion 19A. Further, the inner shape of the center hole formed by the plurality of elastic holding pieces 26A is formed smaller than the outer shape of the flange portion 19A so as not to come off when inserted into the vibration rod 19. When the retaining ring 26 having this structure is inserted into the vibrating rod 19 first from the ring portion 26B, the elastic holding piece 26A is expanded by the flange portion 19A and can be easily inserted into the vibrating rod 19. In the inserted state, the elastic holding piece 26
A is caught by the collar portion 29A so that it cannot be removed.

The end of the vibrating rod 19 having this structure is inserted into the inner blade holder 3B of the arch inner blade 3 to reciprocate the inner blade holder 3B. The inner blade holder 3B of the arch inner blade 3 is provided integrally with a C-shaped connecting portion 3C below. The connecting portion 3C formed in a C-shape is formed in a tapered shape whose width increases downward. At the center of the connecting portion 3C, a driving hole 3D that can be moved in the axial direction by vertically inserting a flange portion 19A of the vibration rod 19 is provided vertically. The flange 19A of the vibration rod 19 is inserted into the driving hole 3D, and the arch inner blade 3 is reciprocated by the vibration rod 19.

Further, as shown in FIG. 8, the retaining ring pushes up the tapered surface of the C-shaped connecting portion 3C to elastically press the arch inner blade 3 against the inner surface of the arch outer blade 1.
The tapered surface of the connecting portion 3C guides the retaining ring 26 to the center so that no gap is formed. In this structure, the flange 19A of the vibrating rod 19 is inserted into the drive hole 3D, the inner blade is reciprocated by the flange 19A and the drive hole 3D, and the retaining ring 26 is pressed against the tapered surface. 26 and the connecting portion 3C press the inner blade against the outer blade. Therefore, the vibrating rod 19 having this structure has a feature that the inner blade can be reciprocated by the vibrating rod 19 while the arch inner blade 3 is lightly pressed against the inner surface of the arch outer blade 1.

Further, in the vibration table 17, a vibration arm 20 for reciprocating the slit inner blade 5 is integrally formed of plastic. The vibrating arm 20 horizontally has a drive rod 21 inserted into a drive slit 5G of a rod portion 5F provided at a lower end of the inner blade holder 5B of the slit inner blade 5. The drive rod 21 is inserted into the drive slit 5G of the inner blade holder 5B of the slit inner blade 5, and reciprocates the slit inner blade 5.

[0059]

The electric razor of the present invention has a feature that the drive mechanism for reciprocating the inner blade is simplified, mass production is possible at low cost, and rattling and noise of the mechanism for driving the reciprocating inner blade are reduced. is there. That is, the driving mechanism of the electric razor of the present invention, a vibration rod connected to the inner blade at the tip to reciprocate, and a vibration table connected to the vibration rod and attached to the case so as to be able to reciprocate, A reciprocating mechanism for reciprocating the shaking table,
This is because the distal end of the vibrating rod is inserted into the drive hole of the inner blade so as to be movable in the axial direction and connected to the inner blade. Further, in the electric razor of the present invention, a blade pressure spring is inserted into the vibration rod, the inner blade is elastically pressed against the outer blade by the blade pressure spring, and the inner blade is reciprocated at the tip of the vibration rod. Therefore, unlike the related art, the member for driving the inner blade does not need to have a structure that can move up and down like a vertical rod. Therefore, the electric razor of the present invention simplifies the mechanism for reciprocating the inner blade, can effectively prevent adverse effects such as noise and rattling, and simplifies the structure for connecting the inner blade to the vibration table. The feature is that assembly can be simplified with a small number of parts and the manufacturing cost can be reduced. In addition, a simple mechanism consisting of a vibrating rod and a blade pressure spring has the feature that the inner blade can be pressed against the outer blade with a large stroke.

Further, the electric razor according to the second aspect of the present invention has a feature that the blade pressure spring inserted into the vibrating rod can be prevented from coming off with a simple structure. This is because this electric razor thickens the tip of the vibrating rod to provide a flange, and inserts a retaining ring at the tip of the vibrating rod to hold the blade pressure spring. This electric razor has a very simple structure in which the retaining ring prevents the blade pressure spring from coming off, and the flange prevents the retaining ring from coming off, so that the blade pressure spring can be surely prevented from coming off the vibrating rod.

Further, in the electric razor according to the third aspect of the present invention, the inner blade is elastically pressed against the inner surface of the outer blade by a retaining ring pressed by a blade pressure spring. This structure has a feature that the connection structure of the inner blade can be simplified by using a retaining ring, which is a member that prevents the blade pressure spring from coming off, together with a member that elastically presses the inner blade against the inner surface of the outer blade. is there.

Further, the electric shaver according to the fourth aspect of the present invention has a feature that the retaining ring can be effectively prevented from coming off the vibrating rod. This is because the retaining ring of the electric razor has an elastic holding piece that elastically deforms in a direction to narrow the center hole. The retaining ring can be inserted into the vibrating rod by expanding the elastic holding piece, and in the inserted state, the elastic holding piece does not get caught by the flange and does not come off the vibrating rod. For this reason, the retaining rod is securely connected to the vibrating rod so as not to come off.

Further, in the electric shaver according to the fifth aspect of the present invention, although the retaining ring can be easily and easily inserted into and connected to the vibrating rod, the retaining ring can be surely prevented from coming off from the vibrating rod. There are features. That is, the electric razor retaining ring has a lower ring portion and a plurality of elastic holding pieces provided extending upward from the ring portion, and the inner shape of the ring portion is larger than the outer shape of the flange portion. This is because the inner shape of the large central hole formed by the plurality of elastic holding pieces is smaller than the outer shape of the flange. The retaining ring of this structure is composed of a plurality of elastic clamping pieces that can easily insert the retaining ring from the ring portion with an inner diameter larger than the outer shape of the flange portion into the vibrating rod and form an inner shape smaller than the outer shape of the flange portion. The retaining ring can be reliably prevented from coming off.

Further, in the electric shaver according to the sixth aspect of the present invention, the connecting portion for connecting the vibrating rod is formed in the inner blade holder of the inner blade so as to be formed in a tapered shape having a width which becomes wider downward. Therefore, even if the vibration rod connected to the inner blade is inserted in a state of being slightly displaced, there is a feature that the vibration rod can be reliably guided to the drive hole of the inner blade. Further, the connecting portion is a tapered portion, and has a feature that the retaining ring is guided to the central portion so that the inner cutter can be pressed against the inner surface of the outer cutter in an ideal state. In addition, since the connecting portion is used in combination with a member that presses the inner blade against the inner surface of the outer blade, the connecting portion also has a feature that the structure can be simplified.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a conventional electric shaver.

FIG. 2 is an exploded perspective view of a razor body of the electric razor shown in FIG.

FIG. 3 is an exploded perspective view showing a connection structure between an inner blade base and upper and lower rods of the electric razor shown in FIG. 1;

FIG. 4 is an exploded perspective view showing a connection structure between an inner blade and an upper and lower rod of the electric razor shown in FIG. 1;

FIG. 5 is an exploded perspective view of the electric shaver according to the embodiment of the present invention.

6 is an exploded perspective view of the razor body of the electric razor shown in FIG.

FIG. 7 is an enlarged perspective view of an outer blade frame and an outer blade case of the electric razor shown in FIG. 5;

FIG. 8 is an enlarged longitudinal sectional view of a main part of the electric shaver according to the embodiment of the present invention.

FIG. 9 is a perspective view showing a state in which the outer blade case is removed from the outer blade frame.

FIG. 10 is a perspective view showing a state in which an outer blade frame is removed from a razor body.

FIG. 11 is a bottom perspective view showing a state where the inner blade is mounted on the outer blade case.

FIG. 12 is an enlarged cross-sectional view of a main part of the electric shaver according to the embodiment of the present invention.

FIG. 13 is an exploded perspective view of the slit outer blade shown in FIG. 12;

FIG. 14 is a partial cross-sectional side view of the vibration table shown in FIG. 6;

FIG. 15 is a partial sectional perspective view of the retaining ring shown in FIG. 14;

[Explanation of symbols]

1: Arch outer blade 1A: Net blade 1B
… Outer blade holder 2… Slit outer blade 2A… Slit outer blade plate 2B
... Outer blade holder 2a ... Parallel slit 3 ... Arch inner blade 3A ... Arch metal blade 3B
... Inner blade holder 3C ... Connecting part 3D ... Drive hole 4 ... Comb 5 ... Slit inner blade 5A ... Slit metal blade 5B
… Inner blade holder 5D… Protrusion 5E… Connection hole 5F… Rod part 5G… Drive slit 6… Outer blade case 6A… Hook piece 6B
... Elastic metal plate 6a ... Both ends 61 ... End plate 62 ... Side plate 7 ... Outer blade frame 7A ... Hook 7B
... through-hole 7C ... opening window 7D ... hooking concave part 7E ... through-hole 7a ... convex part 8 ... guide groove 9 ... guide convex part 10 ... stopper rib 11 ... stopper convex part 12 ... detachable knob 12A ... pressing rod 1
2B: outer blade button 13: detachable button 13A: pressing plate 1
3B ... frame button 14 ... elastic piece 15 ... body case 15A ... opening window 16 ... elastic convex part 17 ... shaking table 17A ... elastic arm 1
7B: connecting slit 18: motor 19: vibrating rod 19A: flange 20: vibrating arm 21: drive rod 22: cam shaft 23: packing rubber 24: blade pressure spring 24A: connecting hole 2
4B: elastic piece 25: blade pressure spring 26: retaining ring 26A: elastic holding piece 2
6B ... Ring part 27 ... Razor body 28 ... Inner blade stand 28A ... Drive pin 29 ... Outer blade 30 ... Inner blade 30A ... Inner blade holder 3
0B: Connecting column 30C: Locking part 31: Vertical rod 31A: Locking window 32: Blade holder 33: Press spring 34: Elastic arm

Claims (6)

[Claims] 1. An electric shaver comprising an outer blade, an inner blade reciprocating inside the outer blade, and a driving mechanism for reciprocating the inner blade, wherein the driving mechanism connects the inner blade to a tip and reciprocates. A vibrating rod (19) to be moved, a vibrating table (17) connected to the vibrating rod (19) and attached to a case so as to be able to reciprocate, and a reciprocating movement for reciprocating the vibrating table (17) The vibrating rod (19) is provided with a driving mechanism (3
D), it is inserted so that it can move in the axial direction and connected to the inner blade, and furthermore, the vibrating rod (19) has a blade pressure spring (25) that elastically presses the inner blade against the outer blade. An electric razor that is inserted and configured to press the inner blade against the outer blade with the blade pressure spring (25) and reciprocate the inner blade at the tip of the vibrating rod (19). 2. The vibrating rod (19) has a thicker end and a flange (1).
9A), the flange portion (19A) is inserted into the driving hole (3D) of the inner blade so as to reciprocate the inner blade, and furthermore, a retaining ring ( 26) is inserted, and this retaining ring (26) is inserted into the vibrating rod (19) so as not to come off at the flange (19A), and the retaining ring (26)
Vibrating rod (19) so that it does not come off the blade pressure spring (25).
The electric razor according to claim 1, wherein the electric razor is inserted into the electric shaver. 3. The electric device according to claim 2, wherein the retaining ring resiliently presses the inner blade via the blade pressure spring to press the inner blade against the inner surface of the outer blade. Razor. 4. The retaining ring (26) has an elastic holding piece (26A) that elastically deforms in a direction to make the center hole thinner.
(26A) can be expanded to insert the retaining ring (26) into the vibrating rod (19), and in the inserted state, the elastic clamping piece (26A) is
3. The electric shaver according to claim 2, wherein the retaining ring is connected to the vibrating rod so that the retaining ring does not come off. 5. The retaining ring (26) is provided with a lower ring portion (26).
B) and a plurality of elastic holding pieces (26A) provided on the periphery of the ring portion (26B) so as to extend upward from the ring portion (26B), and the inner shape of the ring portion (26B) is The inner shape of the center hole formed by the plurality of elastic holding pieces (26A) that is larger than the outer shape of the flange portion (19A) is formed smaller than the outer shape of the flange portion (19A). Electric razor. 6. The inner cutter has an inner cutter holder, and the inner cutter holder has a connecting portion (3C) for connecting the vibrating rod (19), and the connecting portion (3C) has a width extending downward. The electric shaver according to claim 2, wherein the electric shaver is formed in a tapered shape having a large width.