JP2002166071A - Electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent breakage of an outside blade of an electric razor when the electric razor is allowed to fall. SOLUTION: The electric razor comprises the outside blade 3 consisting of a thin metal plate with a plurality of holes for the hair and having a curved arch shape, an inside blade 4 provided inside the outside blade so as to slide on along the inside of the outside blade, an outside blade case 5 provided in close proximity to both ends of the outside blade having an end protruding parts 6 for protecting both the ends of the outside blade and a cap 2 to be fixed so as to cover the outside blade and the outside blade case, wherein the end protruding parts protrude beyond the outside blade and stopper protruding parts 10 arranged inside both the end protruding parts are provided inside the cap. The cap in a fixed state is provided with the stopper protruding parts inside the end protruding parts. The stopper protruding parts provided therein prevent the end protruding parts from being deformed toward the outside blade and pushing the outside blade to deform the same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an outer blade formed by bending a thin metal plate into an arch shape, and a cap is attached and detached so as to cover the outer blade in order to prevent damage to the outer blade. It relates to an electric razor that can be mounted.

[0002]

2. Description of the Related Art An outer blade that is curved in an arch shape is made of a thin metal plate in order to cut a short beard. If the outer blade is thick, the beard cut by the outer blade and the inner blade becomes longer. This is because a beard hole provided in the outer cutter is penetrated inward, and the beard is cut by the inner cutter that slides on the inner surface of the outer cutter. For this reason,
A very thin metal plate is used for the outer blade. Thin metal plates are easily deformed or damaged by impact. In order to eliminate this drawback, a plastic cap that covers the outer blade is attached when the electric razor is not used.

[0003]

The cap can protect the outer blade in most use conditions. However, when the electric razor is dropped, damage to the outer blade cannot be effectively prevented.
In particular, when the electric shaver is dropped with the outer blade facing downward with the cap on, the outer blade is almost completely broken. At first, the inventor could not find out the cause of the damage of the outer blade despite the cap being put on. Because the outer blade is covered with the hard plastic cap, there is no direct contact between the outer blade and the outer blade.
Nevertheless, when the electric shaver was turned down and dropped from a height of about 1 m, the outer blade was almost completely broken. The inventor closely observed the state in which the outer blade was damaged. As a result, they found that the outer blade was broken at almost the same position. The same position of the outer blade is
When falling, it does not mean that the outer blade directly collides with an object and is damaged. This is because the same position of the outer blade does not hit the object. Then, the present inventor further investigated in detail the state in which the outer blade was damaged, and as a result, found that the outer blade was deformed into the inner blade and the end projection and was damaged.

When the electric shaver is dropped downward, as shown in FIG. 1, one of the end protrusions 6 collides with the floor 14 and is deformed inward. The deformed end projection 6 bends the outer blade 3 inward. At this time, the inner blade 4 has an inner blade 4 on the inner surface of the outer blade 3 to prevent the outer blade 3 from being deformed.
The outer edge of the inner blade 4 is deformed with an extremely small radius of curvature. Since the outer cutter 3 is formed by bending a thin metal plate into an arch shape, if it is bent inward with a small radius of curvature, an extremely excessive force acts on the bent portion. For this reason, it is damaged at the bent portion. The rectangular plate-shaped outer cutter 3 has a large number of holes on substantially one inner surface with a constant width from the outer periphery.
The broken part was a boundary portion between one outer peripheral portion on the falling side and an inner hole near the upper end in a state of being always mounted on the electric shaver.

[0005] By making the end projections have a strong structure, damage to the outer cutter can be reduced. For example, the end protruding portion is made of plastic reinforced with glass fiber or carbon fiber, or made of metal to prevent damage to the outer blade. However, this structure has a drawback that the manufacturing cost of the parts for forming the end protrusions becomes high or heavy.

The present invention has been developed to solve this drawback, and an important object of the present invention is to drop an electric shaver without making the end projections firm and tough. An object of the present invention is to provide an electric shaver that can effectively prevent the outer blade from being damaged when the electric blade is damaged.

[0007]

SUMMARY OF THE INVENTION An electric razor according to the present invention comprises an outer blade 3 formed by bending a thin metal plate having an infinite number of mustache holes in an arch shape, and an outer blade which slides on the inner surface of the outer blade 3. An outer blade case 5 having an inner blade 4 disposed inside the outer blade 3; an outer blade case 5 having end protrusions 6 disposed close to both ends of the outer blade 3 to protect both ends of the outer blade 3; The blade includes a blade and a cap mounted to cover the outer blade case. The end protrusion 6 protrudes from the outer cutter 3. Further, on the inner surface of the cap 2, the stopper protrusions 1 disposed inside the two end protrusions 6 are provided.
0 is provided. When the cap 2 is mounted, the stopper projection 10 is disposed inside the end projection 6. The stopper projection 10 disposed here has an end projection 6 that is the outer cutter 3.
, And prevents the end protrusion 6 from being deformed by pushing the outer cutter 3.

The end protrusions 6 provided on both sides of the outer cutter 3 are preferably formed integrally with the outer cutter case 5 to which the outer cutter 3 is detachably connected. The stopper projection 10 of the cap 2 is preferably a ridge extending along the inside of the end projection 6. Further, the stopper convex portion 10 is preferably a convex line along the arch shape of the outer cutter 3.

As shown in FIG. 2, the electric shaver of the present invention falls downward with the cap 2 on, and even if one of the end protrusions 6 collides with the floor 14, Is deformed inward toward the outer blade 3 by the stopper protrusions 10.
To prevent. The cap 2 has a stopper projection 10 on the inner surface. In the figure, the right stopper projection 10 is
The end protrusion 6 prevents deformation inward, and the left stopper protrusion 10 prevents the cap 2 from shifting to the left. Further, when the cap 2 slightly shifts to the left, the stopper projection 10 shifts the left and right end projections 6 to the left, and the outer blade 3
To the left. For this reason, even if the right end convex portion 6 is deformed to the left, the outer blade 3 is not pressed and deformed.
Effectively prevent damage.

[0010]

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

Further, in this specification, in order to make it easy 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 FIG. 3 includes a razor body 1 and a cap 2. The razor body 1 is made of a thin metal plate having an infinite number of mustache holes and an outer blade 3 curved in an arch shape.
An inner cutter 4 disposed inside the outer cutter 3 so as to slide on the inner surface of the outer cutter 3, and both ends of the outer cutter 3 disposed close to both ends of the outer cutter 3. And an outer blade case 5 having an end convex portion 6 for protecting the outer blade. The electric shaver in the figure is connected to the main body case 7 so that the outer blade case 5 can be attached and detached. This electric shaver can be easily cleaned by removing the outer blade case 5. However, the outer blade case may be integrated with the main body case.

The outer blade case 5 is shown in FIGS. The outer cutter case 5 shown in these figures is provided with end protrusions 6 at positions approaching both sides of the outer cutter 3. The entire outer cutter case 5 is integrally formed of a hard plastic such as ABS. The end protruding portion 6 provided on the outer cutter case 5 has a shape protruding from the outer surface of the outer cutter 3 and has a tip end formed in an arch shape. The end protrusions 6 do not press both ends of the outer cutter 3,
A slight gap is provided between the outer edge 3 and the edge. The outer cutter case 5 has an opening between the end protrusions 6 provided on both sides, and the outer cutter 3 is connected to this opening.

The outer blade 3 is, for example, an extremely thin metal plate having a thickness of several tens of μm, and has connection holes 8 on both sides as shown in the sectional view of FIG. The outer cutter 3 hooks the connecting hole 8 on the connecting protrusion 9 provided on the inner surface of the outer cutter case 5,
It is connected to the outer blade case 5.

The inner blade 4 has a plurality of plate-like blades fixed in parallel at a predetermined interval. Each of the plate-like blades has a tip edge curved in an arch shape, and is provided on the inner surface of the outer blade 3. It has a shape that slides on contact. The length (L1) of the inner cutter 4 in the reciprocating motion direction is shorter than the length (L2) of the outer cutter 3. This is for reciprocating inside the outer cutter 3. The inner blade 4 is mounted on a shaking table (not shown) built in the razor body 1.
Are connected so as to be elastically extruded toward the inner surface of the outer blade 3 and come into contact with the inner surface of the outer cutter 3. The shaking table is reciprocated by a motor (not shown) built in the razor body 1 and a mechanism for converting a rotary motion into a reciprocating motion, thereby causing the inner blade 4 to reciprocate.

The cap 2 is made entirely of a hard plastic, for example, polyethylene, polypropylene, ABS.
Etc. 6 to 8 show a longitudinal sectional view, a transverse sectional view, and a bottom view of the cap 2. FIG. The cap 2 in these figures has an inner shape substantially equal to the outer shape of the tip of the razor body 1 to which the outer blade case 5 is connected. (In FIGS. 6 and 7, the relative positions of the outer blade 3, the end protrusion 6, and the like are indicated by dotted lines.) The cap 2 has four corners on the inner surface of the opening in order to hold the cap 2 in a mounted state with a locking structure. Is provided with a locking projection 11. The razor body 1 is provided with a locking recess 12 for locking the locking projection 11. As shown in FIG. 7, the cap 2 shown in the figure
A notch 13 is provided upward from the opening. Since the cap 2 is easily elastically deformed, it can be smoothly attached to and detached from the razor body 1 without difficulty. This is because, by the elastic deformation of the cap 2, the locking projection 11 can be smoothly guided and locked into the locking recess 12 of the razor body 1, and the locked state can be released smoothly.
In this embodiment, the cap 2 is made of a transparent plastic.

The inner surface of the cap 2 is formed along the shape of the end protrusion 6, and a stopper protrusion 10 is provided to protrude from the inner surface in order to prevent deformation of the end protrusion 6.
As shown in FIG. 6, the stopper projection 10 is provided with two end projections to prevent the end projections 6 from being deformed inward due to a dropping impact and causing the outer blades 3 to be deformed by protruding. 6 and is disposed close to the end protrusion 6. The stopper projection 10 is provided so as to protrude from the inner surface of the cap 2, but does not contact the outer blade 3 when the cap 2 is not pressed. This is because if the stopper projection 10 always contacts the outer cutter 3, the outer cutter 3 may be damaged. As shown in FIG. 7, the stopper protrusion is a substantially ring-shaped protrusion along the curved surface of the outer cutter 3.
The interval between 0 and the outer cutter 3 is, for example, 0.1 to 0.5 mm. Therefore, it is possible to prevent the outer blade 3 from moving in the vertical direction due to the impact at the time of falling.

The stopper protrusion 10 shown in the figure is a substantially link-shaped protrusion extending along the inside of the end protrusion 6, and the stopper protrusion 10 of this structure is an ideal state of the end protrusion 6. Deformation can be prevented. When the end protrusion 6 is deformed, the stopper protrusion 10
Abuts on a large area or a long part, and the end protrusion 6
This is because the deformation of can be prevented. In addition, the stopper convex portion 10 having the shape of a convex ridge also functions as a reinforcing rib for reinforcing the inner surface of the cap 2, and also has an effect of reducing the deformation by reinforcing the distal end portion of the cap 2. When a drop test was performed on the capped electric razor of this embodiment from a height of about 1 m in the same manner as in the related art, no damage to the outer blade occurred.

The cap 2 shown in the figure has a pair of stopper projections 1.
Although 0 is separately provided on both sides, it is also possible to adopt a shape in which a pair of stopper protrusions are connected as an integral structure. In the cap provided with the stopper protrusion having an integral structure, the gap between the end protrusions is thickly formed to be the stopper protrusion. This cap can have a tough structure with a thicker tip.

[0020]

The electric shaver of the present invention has a feature that the outer blade can be effectively prevented from being damaged when the electric shaver is dropped. That is, the electric shaver of the present invention makes the end protrusions of the outer cutter case disposed close to both ends of the outer cutter protrude from the outer cutter, and the inner surface of the cap includes the inner protrusions of both end protrusions. This is because the stopper convex portion provided in the first position is provided. In the electric razor having this structure, it is possible to prevent the end protrusion from being deformed toward the outer cutter by the stopper protrusion disposed inside the end protrusion when the cap is mounted. Therefore, the electric razor of the present invention has an extremely simple structure without forming a strong and rigid structure at the end projections, and effectively prevents the end projections from being deformed by pushing the outer blade due to a dropped impact or the like. it can.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a conventional electric razor falls and collides with a floor.

FIG. 2 is a cross-sectional view showing a state in which the electric razor according to the embodiment of the present invention falls and collides with the floor

FIG. 3 is a front view of the electric shaver according to the embodiment of the present invention.

4 is a partial cross-sectional side view of the upper part of the electric shaver shown in FIG.

5 is a sectional view of the outer blade case of the electric razor shown in FIG.

FIG. 6 is a longitudinal sectional view of the electric razor cap shown in FIG. 3;

FIG. 7 is a cross-sectional view of the cap shown in FIG. 6;

FIG. 8 is a bottom view of the cap shown in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Razor main body 2 ... Cap 3 ... Outer blade 4 ... Inner blade 5 ... Outer blade case 6 ... End convex part 7 ... Main body case 8 ... Connection hole 9 ... Connection convex part 10 ... Stopper convex part 11 ... Locking convex part 12 ... Retaining recess 13 ... Notch 14 ... Floor

Claims (4)

[Claims] 1. An outer blade (3) having an arc-shaped curved thin metal plate having countless mustache holes, and an inner surface of the outer blade (3) being slid on the inner surface of the outer blade (3). Inner blade (4) and outer blade
An outer blade case (5) having an end protrusion (6) disposed close to both ends of (3) and protecting both ends of the outer blade (3); an outer blade (3) and an outer blade case; (5) An electric razor equipped with a cap (2) mounted so as to cover the end cap (2).
On the inner surface of (2), there are provided stopper protrusions (10) arranged inside both end protrusions (6), and with the cap (2) attached, the stopper protrusions (10) are It is arranged inside the end protrusion (6), and the stopper protrusion (10) prevents the end protrusion (6) from deforming toward the outer blade (3). And an electric razor. 2. The electric device according to claim 1, wherein the end protrusion is integrally formed with an outer blade case connected to the outer blade so that the outer blade can be detached. Razor. 3. The electric shaver according to claim 1, wherein the stopper projection (10) is a projection along the inside of the end projection (6). 4. The electric razor according to claim 1, wherein the stopper projection (10) is a projection along the arch shape of the outer cutter (3).