JPS62148684A - Inner blade body of reciprocal electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to an inner cutter body of a reciprocating electric shaver that is driven to slide back and forth on the inner surface of an outer cutter.

[Background Art 1 The inner cutter body of a reciprocating electric shaver is normally used, as shown in Fig. Each inner cutter 1 is integrated with a holding member 5 made of synthetic resin or a metal member in which the member and inner cutter are embedded, and then the upper edge of each inner cutter 1 is ground 19 to form an edge. The inner cutters 1 are spaced at equal intervals, and the portions located in the zones where hair canting can be performed between the edges of the inner cutters 1 and in relation to the blade holes of the outer cutters 4 are open. It was a space that was

For this reason, when the outer cutter 4 is pressed against the skin as shown in FIG. If the inner surface of the outer cutter 4 is scraped by the inner cutter 1''C as the inner cutter slides back and forth, a situation will occur.If this progresses, Because the thickness of the outer blade becomes thinner,
If the skin protrudes to the inner surface of the outer cutter and comes into contact with the inner cutter 1, it may cause severe irritation or damage to the skin, and may also cause damage to the outer cutter. It has the disadvantage that the cutting edge of the inner cutter and the edge of the outer cutter hole become dull due to wear. Furthermore, in manufacturing the inner cutter body, a processing step is required to integrate the separate inner cutters with the holding member 5, which increases the cost.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to provide an inner blade of a reciprocating electric shaver that is sharp, has a long life, and is inexpensive. There is something to do.

[Disclosure of the Invention] However, the present invention provides an inner cutter with two lines as edges and a holding member that holds the inner cutter. In the inner cutter body which is formed as a rib and slides back and forth on the inner surface of the outer cutter, the holding member is formed as a rib and is also formed integrally with the inner cutter, so that the sliding surface with the inner surface of the outer cutter is formed between the inner cutter and the rib. It is characterized by having a shape in which polygons are lined up, and instead of connecting multiple inner cutters with a holding member, each inner cutter and a rib serving as a holding member are integrally formed to form an outer cutter. The beam is also in contact with the inner surface of the tube.

The present invention will be described in detail below based on the illustrated embodiments.
The figure and fjS2 figure show one embodiment of the present invention, in which a reciprocating blade is formed on the inner surface of the outer cutter 4, which is made of a thin and visible member and is held in a bent state with an arched cross section. The sliding inner cutter body has a large number of inner cutters 1 whose cross section in a direction perpendicular to the sliding direction is arch-shaped, and a plurality of inner cutters 1 formed along the sliding direction J to connect each inner cutter 1. It is an integrally molded product consisting of several ribs 2, and the sliding surface with the outer cutter 4 has a shape in which polygons are arranged side by side. In other words, @Figure 2 (a
) The planar shape is shown in FIG.

In the inner cutter body formed in this way, the ribs 2 between each inner cutter 1 regulate the amount of deflection of the outer cutter 4 when the outer cutter 4 is pressed against the skin, as shown in FIG. Therefore, interference between the inner cutter 1 and the outer cutter 4 is reduced, and the outer cutter 4 is almost never scraped by the inner cutter 1.

In the above embodiment, each space surrounded by the inner cutter 1 and the rib 2 is square, and each square is arranged neatly vertically and horizontally. However, in the embodiment shown in FIG. The ribs 2 connecting the openings of the blades 1 are shifted by half a pitch between each inner cutter 1, so that the rectangular spaces surrounded by the inner cutters 1 and the ribs 2 are arranged in a staggered manner.

Furthermore, in the one shown in Fig. 5, adjacent inner cutters 1 are connected by ribs 2 that intersect with the sliding direction, so that the space surrounded by the inner cutters 1 and ribs 2 is hexagonal. . In addition, in the one shown in Fig. 6, the inner cutters 1 are arranged parallel to each other so as to intersect with the sliding direction, and the inner cutters 1 are arranged parallel to each other so as to intersect in the opposite direction to the sliding direction. Each space surrounded by the inner cutter 1 and the rib 2 forms a diamond shape. However, in the embodiment shown in Figs. ttS1 to 4, the portion formed in the direction orthogonal to the sliding direction of the inner cutter body is formed along the sliding direction of the inner cutter 1 and the inner cutter body. Therefore, the part between the blade hole of the outer cutter 4 and the part that does not contribute to hair cutting at all could be clearly distinguished from the rib 2, but as shown in Figs. 5 and 6, Since every part of the inner blade contributes to cutting the beard, it is not possible to clearly distinguish between the inner blade 1 and the rib 2, and all of them cut the beard between the inner blade 1 and the rib 2. Inner blade 1
It is good to think that it is. Each part serves as an inner cutter 1, and each part serves as a rib 2 connecting the inner cutters 1.

Another embodiment is shown in FIG. This is because in each of the above embodiments, the contact area with the outer cutter 4 becomes large, which may increase the sliding load on the inner cutter. The height of each rib 2 is several micrometers lower than that of each inner cutter 1 in the inner cutter body which is a one-piece body. When the outer cutter 4 is not pressed against the skin, only the inner cutter 1 comes into contact with the inner surface of the outer cutter 4, leaving a slight gap between the rib 2 and the inner surface of the outer cutter 4. , when the outer blade 4 is pressed against the skin, the outer blade 4
The ribs 2 prevent the inner cutters 1 from falling due to bending. Although only examples corresponding to the embodiment shown in FIG. 1 have been shown here, examples will be considered in which the ribs 2 are slightly lowered in the same way for each of the embodiments shown in FIGS. 4 to 6. be able to.

Now, the inner cutter body in which the inner cutter 1 and the rib 2 are integrally formed as described above can be formed, for example, as a ceramic molded product. Even complex shapes can be easily formed through the steps of injection molding, degreasing the molded product, and sintering. Of course, it can also be formed as a plastic molded product or a cast product of metal such as aluminum or zinc. However, in this case, it is difficult to form edges with high hardness, so coating with nitride, oxide, carbide, silicide, etc.
'l 3 is formed to a thickness of about 1 to 3 μm by means of physical vapor deposition or the like. In addition, when using a plastic molded product, one reinforced with carbon WL fiber or the like is used. Instead of the coating layer 3, a plating layer of chromium, nickel, or the like may be formed.

In addition, for those on which the coating layer 3 is formed, if the sliding surface with the outer cutter 4 is polished, the coating layer 3 will be removed.
Due to the difference in hardness between the base material and the base material, which is made of metal or plastic, the polished surface has a more polished shape than the base material than the coating layer 3, as shown in Figure 9, resulting in an acute angle. In addition to forming a sharp edge, the contact area with the outer cutter 4 is also reduced, so the sliding load is reduced.
The temperature rise on the moon's surface will also be small.

By the way, providing such a coating layer 3 can be applied to the outer cutter 4 as well. FIG. 10 shows an example of this. However, here, the number of coating layers provided on the outer cutter 4 is not one layer, but two layers, the inner M41 and the outer layer 42, and the inner/141 and outer 1η42 have different hues. The larger the difference in hue, the better, and complementary colors are best. In the case of an achromatic color, it is assumed that there is a large difference in brightness, such as white and black. For this reason, the inner layer 41 and the outer Ni layer 42 are made of completely different materials, or even if they are of the same type, they are formed of materials that can produce different color tones, such as nitride and carbide. For example, the outer layer 42 may be a yellow to gold T1Ni coating, the inner layer 41 may be a deep blue to Hiko purple TiO coating, the outer layer 42 may be a white to silver CrN coating, and the inner layer 41 may be a gray m- TiC type and Cr C
It is a system coating.

In the outer cutter 4 having such a two-layer coating, wear of the outer cutter 4 results in wear of the coating layer, and since this wear is first done to the outer layer 42, the wear progresses. In this case, the inner layer 41 appears on the surface, and from the difference in color tone between the outer layer 12 and the inner layer 41, this can be directly distinguished with the eye, and therefore the lifespan of the outer cutter 4 can be easily determined. It is something that can be done. Is local wear caused by deformation of the outer cutter 4 as well? II can be classified.

The jrl of the outer WI 42 on the inner surface side where the inner blade 1 slides is made larger than the thickness of the outer layer 42 on the surface side that contacts the skin,
By balancing the side that comes into contact with the skin and the side that comes into contact with the inner cutter 1, such as making the side that comes in contact with the skin softer and the side that makes contact with the inner cutter 1 harder, it becomes more practical. It becomes something like that. In addition, it is also effective to provide a hole 43 in the outer layer 42 to expose a part of the inner layer 41 so that the color of the inner) VJ 41 can be easily recognized from the sound used. Of course, such a two-layer coating with different tones is effective for the inner blade body.

[Effect of the invention 1 As described above, in the present invention, the rib is outside) E is deflected! 1
1, and as a result, the number of steps between the outer blade and the outer blade is reduced, and the outer blade is less likely to wear out, and it maintains good sharpness for a long time. In terms of manufacturing, the inner cutter and ribs are integrated, reducing the assembly process, resulting in lower costs.

[Brief explanation of drawings]

Figure r51 is a perspective view of one embodiment of the present invention, Figure 2 (a)
(l+) is a plan view and a cross-sectional view of the same example 2, and FIG. 3 shows the same effect as the above. Figures 5(u) and 5(b) are SL side views and cross-sectional views of other embodiments, and FIG. 6(a)
(1)) is a plan view and a cross-sectional view of another embodiment, and Fig. 7 (
a ) (+1) Beam L is a plan view and a cross-sectional view of another embodiment, FIG. 8 is a longitudinal sectional view of another embodiment, ttS9 is a longitudinal sectional view of still another embodiment, and FIG. A vertical cross-sectional view of the outer cutter, t IS11 is a perspective view of the conventional example, t! Figure S12 (a)
(b) is a plan view and V cross-sectional view of the same H, Figure 13 is the same,
It is a longitudinal cross-sectional view of L, and 1 shows an inner cutter, 2 shows a rib, and 4 shows an outer cutter. Agent Patent Attorney Ishi 1) Ai 7 Figure 1 Figure 2 (G) (b) Figure 3 Figure 5 EA Figure 7 Figure 8- Figure 10 Figure 11 Figure 12 Figure 5 (G) (b) Figure 13 figure

Claims (3)

[Claims] (1) In an inner cutter body that is composed of an inner cutter whose upper edge is an edge and a holding member that holds this inner cutter and slides back and forth on the inner surface of the outer cutter, the holding member is formed as a rib and An inner cutter body for a reciprocating electric shaver, characterized in that it is formed integrally with an inner cutter, and the sliding surface with the inner surface of the outer cutter has a shape in which polygons are lined up between the inner cutter and ribs. (2) The inner cutter body of a reciprocating electric shaver according to claim 1, wherein the rib is lower in height than the inner cutter by several micrometers. (3) It is formed as an integral molding of soft material such as plastic, and the entire surface is plated with chromium, nickel, etc., or coated with nitride, oxide, carbide, silicide, etc. 2. The inner cutter body of a reciprocating electric shaver according to claim 1, wherein the sliding surface with the blade is polished.