JP3802385B2 - Electric razor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric razor connected so that an outer blade can be attached to and detached from a blade frame.
[0002]
[Prior art]
When using an electric razor, shavings accumulate inside the outer blade. In order to clean this, it is connected to the blade frame so that the outer blade can be removed. The outer blade slides on the inner blade along the inner surface, and cuts the whisker inserted into the beard hole of the outer blade with the inner blade. If there is a gap between the inner blade and the outer blade, the beard cannot be cut efficiently. For this reason, it is important that the outer blade to be attached / detached is mounted at a fixed position of the blade frame. It is also important that it can be easily detached.
[0003]
An electric razor capable of attaching and detaching the outer blade to the blade frame is described in JP-T-2000-516116. As shown in FIG. 1, this electric razor is provided with an elastic protrusion 21 on the blade frame 20, and a recess (not shown) for guiding the elastic protrusion 21 is provided on the inner surface of the holder 22 </ b> A of the outer blade 22. . The elastic protrusion 21 is elastically pushed outward by a built-in push spring (not shown). When the outer blade 22 is mounted on the blade frame 20, the electric razor elastically protrudes the elastic protrusion 21 into the concave portion on the inner surface of the holder 22 </ b> A and connects the outer blade 22 to the blade frame 20 so as not to come off.
[0004]
[Problems to be solved by the invention]
The electric razor shown in FIG. 1 has the feature that the outer blade can be easily detached. However, the electric shaver having this structure has a complicated mechanism for elastically projecting the elastic protrusion, and has a drawback that it takes time to assemble because very small parts are assembled in a narrow portion. In addition, if the elastic protrusion cannot be smoothly moved in and out after a long period of use, it is difficult to firmly connect the outer blade to the blade frame.
[0005]
The present invention has been developed for the purpose of solving this drawback. An important object of the present invention is to provide an electric razor that can be attached and detached so that the outer blade can be securely attached while the assembly can be simplified with a very simple mechanism and the manufacturing cost is reduced.
[0006]
[Means for Solving the Problems]
The electric razor of the present invention includes an outer blade 4 that connects the mesh blade 4B to the holder 4A, and a blade frame 2 that is connected so that the outer blade 4 can be attached and detached. The blade frame 2 has a pair of end walls 2A at positions facing both ends of the outer blade 4, and the pair of end walls 2A are connected by a connecting portion 2B, and the end wall 2A is connected to the connecting portion 2B. The outer blade 4 is connected between the pair of end walls 2A. Further, the blade frame 2 is disposed in parallel with the connecting portion 2B, and is elastically deformed with a locking horizontal bar 5, and this locking horizontal bar 5 is directed toward the holder 4A of the outer blade 4 mounted on the outside. And an elastic body 6 that extrudes elastically. The locking horizontal bar 5 is disposed at a position facing the inner surface of the outer blade 4. The locking horizontal bar 5 and the outer blade 4 are each provided with a locking projection 8 on one side and a locking recess 7 for locking the locking projection 8 on the other side. The locking horizontal bar 5 is elastically pressed by the elastic body 6 against the inner surface of the holder 4 </ b> A of the outer blade 4 to connect the outer blade 4 to the blade frame 2.
[0007]
The blade frame 2 is provided with a pair of locking horizontal bars 5 separated from each other in parallel with the connecting portions 2B on both sides, and coil springs 6A that are elastic bodies 6 at the ends of the both locking horizontal bars 5. Can be connected. In the blade frame 2, the coil spring 6 </ b> A elastically presses the locking horizontal bar 5 against the inner surface of the holder 4 </ b> A of the outer blade 4 to connect the outer blade 4. The elastic body 6 can also be an elastic metal plate 6B fixed to the inner surface of the locking horizontal bar 5. Further, preferably, both the elastic metal plate 6B and the coil spring 6A are used as the elastic body 6, and the locking horizontal bar 5 is elastically pushed toward the holder 4A of the outer blade 4.
[0008]
The blade frame 2 is provided with a guide groove 10 for holding the locking horizontal bar 5 so that the locking horizontal bar 5 can be deformed on the inner surface of the end wall 2A. The bar 5 can be attached to the blade frame 2. The locking horizontal bar 5 is provided with a locking projection 8 at a portion close to both ends, and a locking recess 7 is provided on the inner surface of the holder 4A of the outer blade 4 at a position facing the locking projection 8. Can do. Furthermore, the blade frame 2 can be provided with a stopper convex portion 11 that protrudes from the upper surface of the connecting portion 2B and prevents the locking horizontal bar 5 from being pushed in. The blade frame 2 can be connected to the razor body 1 so as to be removable.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below illustrate electric razors for embodying the technical idea of the present invention, and the present invention does not specify electric razors as follows.
[0010]
Further, in this specification, in order to facilitate understanding of the scope of claims, the numbers corresponding to the members shown in the examples are referred to as “the scope of claims” and “the means for solving the problems”. It is added to the member shown by. However, the members shown in the claims are not limited to the members in the embodiments.
[0011]
The razor shown in FIGS. 2 and 3 includes a razor body 1 that connects an inner blade 3 that reciprocates to the upper end, a blade frame 2 that is detachably connected to the razor body 1, and the blade frame. 2 and an outer blade 4 which is connected so as to be detachable and reciprocates the inner blade 3 along the inner surface.
[0012]
The outer blade 4 connects a mesh blade 4B curved in an arch shape to a plastic holder 4A. The mesh blade 4B is provided through an infinite number of whiskers, and the whisker inserted in the whiskers is cut by the inner blade 3 that reciprocates. The mesh blade 4B is connected to the holder 4A so that it can be replaced, or is fixed to the holder 4A so that it cannot be replaced. As shown in the cross-sectional view of FIG. 4, the holder 4 </ b> A has a locking recess 7 on the inner surface. The locking recess 7 is provided at a position facing the locking projection 8 of the locking horizontal bar 5 provided in the blade frame 2. As shown in FIG. 3, the pair of locking horizontal bars 5 are provided with locking projections 8 at both ends, and thus the holder 4 </ b> A is provided with four locking recesses 7. The electric razor shown in the figure is provided with a locking recess 7 in a holder 4A, and a locking projection 8 of a locking horizontal bar 5 is inserted therein to connect the outer blade 4 to the blade frame 2. Although not shown, contrary to this structure, the holder is provided with a locking projection, the locking horizontal bar is provided with a locking recess, the locking projection is inserted into the locking recess, and the outer blade is connected to the blade frame. You can also Furthermore, the holder 4A is provided with streak-like uneven portions 9 along the outer lower portion so that the finger does not slip when removed from the blade frame 2.
[0013]
The blade frame 2 has a pair of end walls 2A at positions facing both ends of the outer blade 4, and the lower portions of the pair of end walls 2A are connected by a connecting portion 2B. The end wall 2A is provided so as to protrude from the connecting portion 2B, and connects the outer blade 4 between the pair of end walls 2A. The blade frame 2 is integrally formed of a metal such as aluminum or an aluminum alloy with the end wall 2A and the connecting portion 2B as a whole. The end wall 2 </ b> A covers the both ends of the outer cutter 4 with the outer periphery thereof being shaped along the outer shape of the outer cutter 4.
[0014]
The blade frame 2 includes a pair of locking horizontal bars 5 separated from each other and an elastic body 6 elastically pressing the locking horizontal bars 5 in order to connect the outer blades 4 so as to be detachable. Prepare. The pair of locking horizontal bars 5 are made of plastic that can be elastically deformed, and are separately molded in the same shape. The locking horizontal bar 5 is connected to a coil spring 6A, which is an elastic body 6, at both ends. In order to connect the coil spring 6 </ b> A, connecting rods 5 </ b> A inserted into the coil spring 6 </ b> A protrude from the inner side surfaces at both ends. Further, the locking lateral bar 5 is provided with a locking projection 8 integrally formed so as to protrude to the outer surface. The locking projection 8 is provided at a portion near both ends of the locking horizontal bar 5. The locking projection 8 shown in the figure has a mountain shape in which the shape of the cross-sectional view protrudes toward the center. The locking recess 7 of the holder 4 </ b> A into which the locking projection 8 is inserted is a recess having the same shape as the locking projection 8. The electric razor having the locking convex portion 8 and the locking concave portion 7 in this shape can be detached from the blade frame 2 by pulling the outer blade 4 strongly, and can be attached to a fixed position by being strongly pushed into the blade frame 2.
[0015]
The locking horizontal bar 5 is arranged at a position parallel to the connecting portion 2B of the blade frame 2 and facing the lower edge portion of the inner surface of the holder 4A. The locking horizontal bar 5 connects both ends and the center thereof to the blade frame 2. The blade frame 2 is provided with guide grooves 10 on the inner surface of the end wall 2 </ b> A in order to guide and hold both ends of the locking horizontal bar 5. The guide groove 10 guides the end of the locking horizontal bar 5 and connects the locking horizontal bar 5 to a fixed position. The guide groove 10 is also provided with a coil spring 6 </ b> A that is an elastic body 6. The guide groove 10 is provided so as to extend in a direction in which the coil spring 6 </ b> A that is the elastic body 6 presses the locking horizontal bar 5. Further, a stopper convex portion 11 is provided so as to protrude from the upper surface of the connecting portion 2B. As shown in FIGS. 2 and 5, the stopper projection 11 is provided on the inner surface of the locking horizontal bar 5 to prevent the locking horizontal bar 5 from being pushed in by the holder 4A. However, in FIG. 5, in order to make the stopper convex portion 11 easy to understand, a portion indicated by A in the drawing is cut out and is a partial cross-sectional view.
[0016]
The elastic body 6 elastically pushes the locking lateral bar 5 toward the holder 4A of the outer blade 4 mounted on the outside, puts the locking convex portion 8 into the locking concave portion 7, and moves the outer blade 4 to the blade. Connect to frame 2. The elastic metal plate 6B has holes at both ends, and is fixed by crushing the tips of the protrusions with heat in a state where the protrusions provided on the locking horizontal bar 5 are inserted into the holes. The illustrated elastic body 6 includes a coil spring 6 </ b> A that presses an end of the locking horizontal bar 5 and an elastic metal plate 6 </ b> B that is fixed to the inner surface of the locking horizontal bar 5. Since this electric razor elastically pushes the locking horizontal bar 5 to the holder 4A by both the coil spring 6A and the elastic metal plate 6B, the outer blade 4 can be firmly connected to the blade frame 2. However, the electric razor according to the present invention can be formed of only the coil spring or the elastic metal plate of the elastic body. The coil spring 6 </ b> A and the elastic metal plate 6 </ b> B elastically push the end of the locking horizontal bar 5, guide the locking projection 8 to the locking recess 7, and connect the outer blade 4 to the blade frame 2.
[0017]
Although the razor main body 1 is not shown, the razor main body 1 incorporates a drive mechanism for reciprocating the inner blade 3. The inner blade 3 has a large number of blade plates arranged in parallel. The blade plate is curved along the inner surface of the outer blade 4 by curving the upper edge at an arch shape. The driving mechanism for the inner blade 3 includes a battery, a motor driven by the battery, a cam mechanism for converting the rotation of the motor into a reciprocating motion, and a vibration table 12 reciprocated by the cam mechanism. The inner blade 3 is connected to the base 12. The inner blade 3 is connected to the vibration table 12 so as to protrude elastically, and is reciprocated while being elastically pressed against the inner surface of the outer blade 4.
[0018]
Furthermore, the razor main body 1 is provided with hooks 13 for detaching the blade frame 2 on both sides. The hook 13 elastically protrudes the tip outward and is hooked on a hooking recess 14 provided inside the blade frame 2 so as to connect the blade frame 2 to the razor body 1 so as not to come off. Further, the hook 13 projects the release button 15 to the outside of the case. When the release button 15 is pressed, the tip of the hook 13 is detached from the hooking recess 14. In this state, the blade frame 2 is removed from the razor body 1.
[0019]
【The invention's effect】
The electric razor of the present invention has an advantage that it can be easily assembled by an extremely simple mechanism, and can be attached and detached so that the outer blade can be firmly attached while reducing the manufacturing cost. The electric razor according to the present invention has a locking horizontal bar arranged on the blade frame at a position facing the inner surface of the outer blade, and is locked to either the locking horizontal bar or the outer blade. The protrusion is provided with a locking recess for locking the locking protrusion on the other side. Further, the locking blade is elastically pressed against the inner surface of the holder of the outer blade by an elastic body, and the outer blade is cut into the blade frame. It is because it is connected to. In this way, the structure in which the locking horizontal bar is pressed against the holder of the outer blade by an elastic body is easily assembled as an extremely simple structure without causing the elastic protrusion to elastically protrude by a complicated mechanism as in the past. As well as being able to connect the outer blade firmly to the blade frame for a long time.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a conventional electric razor. FIG. 2 is an exploded perspective view of an electric razor according to an embodiment of the present invention. FIG. 4 is a sectional view showing a connecting structure of the blade frame and the outer blade. FIG. 5 is a partial sectional plan view of the blade frame.
DESCRIPTION OF SYMBOLS 1 ... Razor main body 2 ... Blade frame 2A ... End wall 2B ... Connection part 3 ... Inner blade 4 ... Outer blade 4A ... Holder 4B ... Mesh blade 5 ... Locking horizontal bar 5A ... Connection rod 6 ... Elastic body 6A ... Coil spring 6B ... Elastic metal plate 7 ... Locking recess 8 ... Locking protrusion 9 ... Uneven portion 10 ... Guide groove 11 ... Stopper protrusion 12 ... Vibration table 13 ... Hook 14 ... Hook recess 15 ... Release button 20 ... Blade frame 21 ... Elastic protrusion 22 ... Outer blade 22A ... Holder

Claims (6)

The outer blade (4) connecting the mesh blade (4B) to the holder (4A), and a blade frame (2) to which the outer blade (4) can be attached and detached,
The blade frame (2) has a pair of end walls (2A) at positions facing both ends of the outer blade (4), and connects the pair of end walls (2A) with a connecting portion (2B). The end wall (2A) is provided so as to protrude from the connecting portion (2B), and the outer blade (4) can be attached and detached between the pair of end walls (2A).
Further, the blade frame (2) includes a locking horizontal bar (5) arranged in parallel with the connecting portion (2B), and an outer blade (4) mounted on the outer side of the locking horizontal bar (5). An elastic body (6) that elastically pushes out toward the holder (4A),
The locking horizontal bar (5) is disposed at a position facing the inner surface of the outer blade (4), and the locking horizontal bar (5) and the outer blade (4) are either one of the locking protrusions ( 8), the other side is provided with a locking recess (7) for locking the locking projection (8),
The locking horizontal bar (5) is elastically pressed against the inner surface of the holder (4A) of the outer blade (4) by the elastic body (6), and connects the outer blade (4) to the blade frame (2) .
An electric shaver provided with a stopper projection (11) that protrudes from the upper surface of the connecting portion (2B) and prevents the locking lateral bar (5) from being pushed in .   A pair of locking horizontal bars (5) separated from each other are arranged in parallel with the connecting portions (2B) on both sides of the blade frame (2), and elastically attached to the ends of both locking horizontal bars (5). The coil spring (6A) which is the body (6) is connected, and this coil spring (6A) elastically presses the locking horizontal bar (5) against the inner surface of the holder (4A) of the outer blade (4). The electric razor according to claim 1.   The electric shaver according to claim 1, wherein the elastic body (6) is an elastic metal plate (6B) fixed to the inner surface of the locking horizontal bar (5).   The electric shaver according to claim 2, wherein the elastic body (6) is an elastic metal plate (6B) fixed to the inner surface of the locking horizontal bar (5) and a coil spring (6A).   A guide groove (10) for guiding and holding the locking horizontal bar (5) is provided on the inner surface of the end wall (2A), and using this guide groove (10), the locking horizontal bar (5) is The electric razor according to claim 1, which is attached to (2).   The latching horizontal bar (5) has a latching projection (8) at a portion close to both ends, and the inner surface of the holder (4A) of the outer blade (4) faces the latching projection (8). The electric shaver according to claim 1, wherein a locking recess (7) is provided at a position.

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