JPH0442032B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outer cutter for an electric shaver.

The outer blade of conventional electric razors has circular or polygonal hair introduction holes arranged in an array, but with such hair introduction holes, it is difficult to capture long hair, and it is difficult to cut the hair to the root. There is a problem that deep scouring is not possible.

Therefore, in recent years, elongated hair introduction holes have been used as some of the hair introduction holes, but the opening area of the elongated hair introduction holes is larger than that of the circular or polygonal holes. Although this makes it easier to catch long hair, there is a problem that the user's skin also tends to fall into the hair introduction hole, and the user's skin may be damaged by the inner blade.

In order to solve the above-mentioned problems, as shown in FIGS. 1a and 1b, a plurality of protrusions 3 are formed inside the elongated hair introduction hole 2 provided in the outer cutter 1, and the hair introduction hole 2 is formed in the outer cutter 1. The hole 2 as a whole has a long hole shape as shown by the two-dot chain line, which makes it easier to catch long hair, and is also devised to prevent the skin from easily falling into the hair introduction hole 2 through the protrusion 3. has been done.

However, in the case of the elongated hair introduction hole 2 having the above-mentioned protrusions 3, the gap C between the opposing protrusions 3 is too narrow to prevent the skin from falling into the hair introduction hole 2. However, there was a drawback that the ability to easily catch long hair was reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide an outer blade for an electric shaver that can easily catch long hair and prevent damage to the user's skin, in order to overcome the drawbacks of the prior art described above.

In order to achieve this object, the present invention has an elongated hair introduction hole surrounded by ribs, and a stepped part of the rib that is stepped down from the skin contact surface is directed from the rib to the hair introduction hole side. It is characterized by extending integrally with the rib.

Preferred embodiments of the present invention will be described below with reference to the drawings.

In the first embodiment shown in FIG. 2, a stepped portion 3 is formed that protrudes inside a long hair introduction hole 2 provided in the outer cutter 1. More specifically, the hair introduction hole 2 is A curved surface with a small diameter is provided from the rib 4 existing between the ribs 4 to the hair introduction hole 2, and a curved surface with a small diameter is provided below the opening 2a of the hair introduction hole 2, that is, at a step below the skin contact surface 4a which is the upper surface of the rib 4. It has a shape in which a plurality of approximately hemispherical stepped portions 3 protrude.

Therefore, in the above-described embodiment, the width A of the opening 2a of the hair introduction hole 2 is wide, so that it is possible to easily introduce the skin into the hair introduction hole 2. The fact that this skin is easily introduced means that hair also easily enters into the hair introduction hole 2, and once the hair enters the hair introduction hole 2, even if the width B between the stepped sections 3 is somewhat narrow, It is also thin, so it goes into the 3rd section of the paragraph section. However, the presence of the stepped portions 3 prevents the skin from entering between the stepped portions 3, and the skin is not damaged by the inner cutter (not shown).

Next, a method of manufacturing the outer cutter 1 having the above structure will be explained.

As shown in FIG. 4, a resist film 11 is printed on a conductive, for example, aluminum substrate 10 at locations corresponding to the long-hole-shaped hair introduction holes of the outer blade. The portion corresponding to the position of the approximately hemispherical stepped portion on the circumference of this resist film 11 is located on the auxiliary surface 12.
As such, the resist film 11 is not printed but scattered.

Then, as shown in FIG. 5, primary electrodeposition is performed on the aluminum substrate 10 that has undergone the above treatment, and the primary electroforming is applied to the areas where the resist film 11 is not present.
form 3. Therefore, the portion other than the resist film 11 becomes the rib of the outer blade. Of course, a small primary electroforming 13 is also formed on the auxiliary surface 12.

After this first electrodeposition, a second electrodeposition is performed. Then, the secondary electroforming 14 is formed on the primary electroforming 13 as shown in FIG.
The current flowing through rib 4 is smaller than other parts, so growth is slow, and as a result, as shown in Figure 2, rib 4
This results in the formation of a stepped portion 3 that does not reach the height of .

After the secondary electrodeposition, when the formed secondary electroformed 14 is peeled off from the primary electroformed 13, this secondary electroformed 14 becomes an outer blade.

In the above embodiment, the stepped portion 3 protruding inside the hair introduction hole 2 was formed into a substantially hemispherical shape, but as in the second embodiment shown in FIG. It is also conceivable to form it along the inside of the hair introduction hole 2.

The manufacturing method of this second embodiment is almost the same as that of the first embodiment, but in contrast to the first embodiment, where the auxiliary surfaces 12 are scattered on the resist film 11, as shown in FIG. In this step, it is necessary to form a long groove-shaped auxiliary surface 12 around the resist film 11 as shown by the two-dot chain line.

Note that the outer cutter having such a stepped portion can also be manufactured by a well-known press molding method.

As described above, according to the present invention, the opening of the elongated hair introduction hole is widened to allow skin and hair to easily enter the hair introduction hole, so that so-called deep scouring can be performed, and the hair introduction hole is To provide an outer blade of an electric shaver which can prevent the skin from entering too much into the hair introduction hole by the stepped part projecting inward, does not damage the skin due to the inner blade, and is extremely comfortable to use.

[Brief explanation of drawings]

Fig. 1a is a top view showing a conventional example, Fig. 1b is a sectional view of the conventional example, Fig. 2 is a sectional view of the first embodiment of the present invention, and Fig. 3 is a partially sectional perspective view of the same embodiment. Figure, 4th
5 and 6 are explanatory diagrams showing the manufacturing process of the same embodiment, and FIG. 7 is a partially sectional perspective view of the second embodiment of the present invention. 1... Outer blade, 2... Hair introduction hole, 3... Breaking part,
4...Rib, 4a...Skin contact surface.

Claims (1)

[Scope of Claims] 1. It has an elongated hair introduction hole surrounded by ribs, and a step part that is stepped down from the skin contact surface of the rib extends integrally with the rib from the rib to the hair introduction hole side. The outer blade of an electric razor is characterized by: