JPH06218155A - Electric razor - Google Patents

Abstract

PURPOSE:To cope with various camber shapes of a blade, to always secure a close contact property of a fixed blade and a movable blade, and also, to obtain a satisfactory cutting quality. CONSTITUTION:A comb-like fixed blade 1 and a comb-like movable blade 2 for sliding to the fixed blade 1 are held in a state that they are pressed against each other by an elastic body 7. The elastic body 7 presses the movable blade 2 against the fixed blade 1 side extending over roughly overall length in the longitudinal direction of the movable blade 2. The elastic body 7 presses the movable blade 2 by a uniform load, and allows the fixed blade 1 and the movable blade 2 to contact closely to each other without a clearance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating electric shaver, and more particularly to a trimmer, a hair clipper and the like for cutting a beard and the like between a fixed blade and a movable blade.

[0002]

2. Description of the Related Art Conventionally, as a reciprocating electric shaver of this kind, as shown in FIG. 6, for example, a comb-shaped fixed blade 1 having a large number of blade grooves 1a is placed on the upper surface of a base 4, and the base is The protrusion 5 projecting from the upper part of 4 is fitted and fixed in the square hole 30 provided in the fixed blade 1. A comb-shaped movable blade 2 having a large number of blade grooves 2a is placed on the fixed blade 1. The drive rod 32 of the driver 31 disposed below the base 4 penetrates the base 4 and the fixed blade 1 and engages with the square hole 33 formed in the movable blade 2 to move the movable blade 2 to the blade. Is reciprocally driven in the longitudinal direction. A pressing spring 34 is arranged above the movable blade 2, and a plurality of spring pieces 35 are obliquely cut and formed on the pressing spring 34. The spring pieces 35 move the movable blade 2 to the fixed blade 1.
Good sharpness is given by pressing with a suitable pressing force toward. Further, a pressing cover 36 is arranged above the pressing spring 34, and the hooks 10 provided at both ends of the pressing cover 36 are provided with locking holes 1 provided at both ends of the base 4.
By engaging with 1, the trimmer block A'is integrally formed.

[0003]

By the way, the conventional pressing spring 34 is composed of a leaf spring, and in the structure thereof, the number of the spring pieces 35 is usually as small as 2 to 4, and the spring pieces 35 with respect to the movable blade 2 are usually small. There are few pressing points. Therefore, as shown in FIGS. 7 (a) and 7 (b), the movable blade 2 is apt to undergo various warps in manufacturing, and particularly in the case of a complicated warp shape as shown in FIG. 7 (c), With a small number of pressing points as in the conventional case, a gap is generated between the movable blade 2 and the fixed blade 1, and it becomes impossible to secure a good sharpness. In addition, in order to reduce the thickness of the beard after cutting, when the blade thickness is thinned and the blade width is widened to increase the cutting speed, the fixed blade 1 and the movable blade 2 are pressed with a small number of pressing points. It becomes more and more difficult to closely contact with each other. Moreover, since the spring piece 35 made of the above-mentioned leaf spring is in sliding contact with the movable blade 2, abrasion is likely to occur, and there are problems such as noise generation.

The present invention has been made in view of the above problems of the prior art, and its object is to cope with various warp shapes of blades and to always ensure the close contact between the fixed blade and the movable blade. It is to provide an electric razor that can obtain good sharpness.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a comb-shaped fixed blade 1 and a comb-shaped movable blade 2 sliding on the fixed blade 1 are pressed against each other by pressing means. In the electric shaver that is held in a closed state, the pressing means includes an elastic body 7 for pressing the movable blade 2 toward the fixed blade 1 over substantially the entire length of the movable blade 2 in the longitudinal direction. Characterize.

Further, the elastic body 7A preferably has a curved shape for correcting the warped shape of the movable blade 2. Further, a pressing plate 9 for closely contacting the elastic body 7B toward the movable blade 2 on the side opposite to the movable blade 2 with the elastic body 7B sandwiched therebetween.
It is also preferable that the sliding portion 6 is formed between the pressing plate 9 and the elastic body 7 by disposing. Further, it is also preferable that a foot portion 14 which is deformable in the amplitude direction B of the movable blade 2 is provided on the surface of the elastic body 7D on the side of the pressing plate 9 so as to project. Furthermore, it is also preferable that the elastic body 7E is made of a porous material. In this case, the elastic body 7E made of a porous material and the blade groove 2 of the movable blade 2
It is also preferable that the oil passage 20 be formed between the oil passage 20 and a.

[0007]

According to the present invention, as the means for pressing the movable blade 2 against the fixed blade 1, the elastic body 7 for pressing the movable blade 2 toward the fixed blade 1 over substantially the entire length in the longitudinal direction of the movable blade 2. Since the elastic body 7 presses the movable blade 2 with a uniformly distributed load, the fixed blade 1 and the movable blade 2 can be brought into close contact with each other without a gap. Therefore, even if various warps occur in the movable blade 2 during manufacturing, it is possible to prevent a gap from being generated between the movable blade 2 and the fixed blade 1, and to secure a good sharpness. Further, even if the blade thickness is reduced in order to pursue the shortness of the beard after cutting, and the blade width is increased in order to further increase the cutting speed, the elastic body 7 prevents The movable blade 2 can be easily brought into close contact with the movable blade 2.
Moreover, since the elastic body 7 substantially comes into surface contact with the movable blade 2, unlike the conventional case where a spring piece made of a leaf spring is brought into sliding contact with the movable blade 2, abrasion is less likely to occur and noise generation can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The basic structure of the trimmer block A used in this embodiment has a fixed blade 1 and a movable blade 2 as shown in FIG.
And an elastic block 3. Fixed blade 1
Is fixed to the projection 5 projectingly provided on the upper surface of the base 4, and the drive element 31 reciprocally drives the movable blade 2 in the longitudinal direction, which is the same as the conventional one, and the same reference numerals are given to corresponding portions. Attach.

An elastic block 3 is arranged above the movable blade 2. The elastic block 3 is made of rubber, for example.
The elastic body 7 is made of a material such as urethane foam that can give an appropriate elasticity, and the substrate 8 is integrally attached to the upper surface of the elastic body 7. The elastic block 3 presses the movable blade 2 with a uniformly distributed load, and is formed in a rectangular rod shape extending over substantially the entire length of the movable blade 2 in the longitudinal direction. The movable blade 2 is brought into surface contact with the upper surface of the movable blade 2 and is pressed against the fixed blade 1 with an appropriate pressing force to give a good sharpness.

Further, a pressing plate 9 is arranged above the elastic block 3. The pressing plate 9 extends along the longitudinal direction of the elastic block 3 on the side opposite to the movable blade 2 with the elastic block 3 interposed therebetween, and a plurality of pressing plates 9 are formed on the lower surface of the pressing plate 9 at intervals in the longitudinal direction. The sliding portion 6 of is protruding downward. The tip of each sliding portion 6 is rounded, and the tip of the sliding portion 6 is slidable on the substrate 8 of the elastic block 3. Hooks 10 are provided on both sides of the pressing plate 9 in the longitudinal direction, and by engaging the hooks 10 with locking holes 11 provided at both ends of the base 4, the trimmer block A is integrally formed. It is like this.

As described above, the elastic body block 3 is used as a means for pressing the movable blade 2 against the fixed blade 1. In this elastic body block 3, the movable blade 2 is provided over substantially the entire length of the movable blade 2 in the longitudinal direction. Since the elastic body 7 for pressing the fixed blade 1 to the fixed blade 1 side is provided, as shown in FIG. 2, when the lower surface of the elastic body 7 made of rubber, urethane foam or the like and the upper surface of the movable blade 2 are in surface contact, The entire movable blade 2 is pressed by the elastic body 7 with a uniformly distributed load, so that the fixed blade 1 and the movable blade 2 can be brought into close contact with each other without a gap. Therefore, even if the movable blade 2 is warped variously in manufacturing, any warp shape can be corrected by the elastic body 7, so that a gap is not generated between the movable blade 2 and the fixed blade 1. It can be prevented and a good sharpness can be secured. Even if the blade thickness is reduced in order to pursue the shortness of the beard after cutting, and the blade width is increased to increase the cutting speed, the elastic body 7 is used as described above. Since the fixed blade 1 and the movable blade 2 can be easily brought into close contact with each other, they can be sufficiently applied to an electric shaver having a wide blade width. Besides, the elastic body 7
By making surface contact with the movable blade 2, abrasion is unlikely to occur as in the case where a spring piece made of a leaf spring is slidably contacted with the movable blade as in the related art, and noise generation can be prevented as much as possible, thereby increasing practical value. be able to.

As another embodiment of the present invention, the shape of the elastic body 7 is not limited to the rectangular rod shape shown in FIG.
As shown in FIG. 7, the elastic body 7A may be configured by dividing the block into a plurality of blocks 7a, and even in this case, the entire movable blade can be pressed with a uniformly distributed load. Also, FIG.
As shown in (b), the elastic body 7B is replaced with a thin rubber hollow film 1
The hollow membrane 12 may be filled with air, water, etc. in this case, and in this case, in addition to the effect at the time of pressing with a uniformly distributed load, lateral deformation is also possible. Along with this, it becomes possible to omit the sliding portion 6 between the elastic block 3 and the pressing plate 9 as shown in FIG. Also, FIG.
As shown in (c), the thin plate member 13 may be curved to form a large number of small rings to form a long elastic body 7C.
Further, as shown in FIG. 3D, when the warped shape of the movable blade 2 is constant to some extent, a curved elastic body 7D that corrects the warped shape of the movable blade 2 may be configured. That is, when the warp of the movable blade 2 is convexly curved upward, the fixed blade is curved symmetrically with the movable blade 2 so that the lower surface of the elastic body 7D is convex downward. The pressing force when 1 and the movable blade 2 are in close contact can be made uniform over the entire length of the blade, and good sharpness is secured at all positions of the blade regardless of the curved shape of the blade. become able to.

As yet another embodiment of the present invention, FIG.
As shown in (a) and (b), the substrate 8 of the elastic block 3 is
A deformable foot portion 14 in the amplitude direction B of the movable blade 2 may be provided on the upper surface of the. In this case, when the movable blade 2 reciprocates, it becomes possible to eliminate the sliding portion 6 between the elastic block 3 and the pressing plate 9, and the sliding portion is the portion between the movable blade 2 and the fixed blade 1. Therefore, it is possible to further prevent wear and noise. Furthermore, as shown in FIG. 5, the elastic body 7E may be made of a porous material. In this case, since the lubricating oil can be impregnated into the elastic body 7E, the pre-impregnated oil can maintain good sharpness even if no oil is applied for a long time thereafter. Further, the oil passage 20 may be formed between the elastic body 7E made of the porous material and the blade groove 2a of the movable blade 2. In this case, in addition to the effect of maintaining good sharpness without oiling for a long time, a sliding portion between the fixed blade 1 and the movable blade 2 is provided by the oil passage 20 connected from the elastic body 7E to the blade groove 2a. The oil can be smoothly supplied to this.

[0014]

As described above, the present invention uses, as the means for pressing the movable blade against the fixed blade, the elastic body for pressing the movable blade toward the fixed blade over substantially the entire length in the longitudinal direction of the movable blade. Since the elastic body presses the movable blade with an evenly distributed load, it is possible to sufficiently cope with various warped shapes of the blade, and it is possible to always ensure good adhesion between the fixed blade and the movable blade. It is possible to obtain a satisfactory sharpness that satisfies the above requirement, and to prevent wear and noise generation as much as possible by eliminating unnecessary sliding portions as in the conventional case.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a trimmer block used in an embodiment of the present invention.

FIG. 2 is a front view showing a pressed state of the elastic body against the warp of the movable blade of the above.

3 (a) to 3 (d) are explanatory views of a modified example of the elastic body of the above.

4 (a) and 4 (b) are explanatory views of still another modification of the above elastic body.

FIG. 5 is a partial perspective view showing still another modified example of the above elastic body.

FIG. 6 is an exploded perspective view showing a conventional trimmer block.

7A to 7C are front views showing a pressing state of a spring piece against a warp of a conventional movable blade.

[Explanation of symbols]

 1 Fixed Blade 2 Movable Blade 6 Sliding Part 7 Elastic Body 9 Holding Plate 14 Foot 20 Oil Passage B Amplitude Direction

Claims (6)

[Claims] 1. An electric shaver comprising a comb-shaped fixed blade and a comb-shaped movable blade that slides on the fixed blade held in pressure contact with each other by a pressing means. An electric razor comprising an elastic body for pressing a movable blade toward a fixed blade over substantially the entire length in the longitudinal direction. 2. The electric shaver according to claim 1, wherein the elastic body has a curved shape for correcting a warped shape of the movable blade. 3. A pressing plate for closely contacting the elastic body toward the movable blade is arranged on the side opposite to the movable blade across the elastic body, and a sliding portion is provided between the pressing plate and the elastic body. The electric shaver according to claim 1, wherein the electric shaver is formed. 4. The electric shaver according to claim 1, wherein a foot portion which is deformable in the amplitude direction of the movable blade is projectingly provided on a surface of the elastic body on the side of the pressing plate. 5. The electric shaver according to claim 1, wherein the elastic body is made of a porous material. 6. The electric shaver according to claim 5, wherein an oil passage is formed between the elastic body made of the porous material and the blade groove of the movable blade.