JPS59151979A - Outer blade of 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] 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 hairs, and the root of the hair is removed. There are 5 problems in that it is not possible to make deep cuts.

Therefore, in recent years, long hole-shaped hair introduction holes have been used as part of the hair introduction holes. Although it is easier to catch long hair because of the inner blade, the user's skin is also more likely to fall into the hair introduction hole, resulting in the problem that the user's skin may be damaged by the inner blade.

In order to solve the above-mentioned problems, Fig. 1(a), Fig. 1(
As shown in b), 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 as a whole has an elongated hole shape as shown by a two-dot chain line, It has been proposed that the long hair be easily drawn in, and that the protrusion 3 prevents the skin from easily falling into the hair introduction hole 2. However, the elongated hole shape having the protrusion 3 described above In the hair introduction hole 2, the gap C between the opposing protrusions 3 is too narrow, and although the function of preventing the skin from falling into the hair introduction hole 2 is sufficiently performed, the function of making it easier to catch long hair is reduced. There was a drawback.

The purpose of the present invention is to solve the above-mentioned drawbacks of the prior art,
To provide an outer blade of an electric razor that can easily catch long hair and prevent damage to the user's skin.

In order to achieve this object, the present invention provides a second embodiment of the present invention, characterized in that the central portion K of the rib portion between the long-hole-shaped hair introduction holes is formed with a protruding curved surface. This will be explained according to FIGS. 6 to 6.

The shape of the lattice-like lip portion 3 formed between the elongated hair introduction holes 2 provided in the outer blade 1 includes a first curved surface portion 3a on the side forming the hair introduction hole 2, and a first curved surface portion 3a on the upper side. A protruding curved surface 3b serving as a second curved surface portion is provided in the central portion.

Therefore, the width A of the opening 40 between the protruding curved surfaces 3b is wide, and the skin can be easily introduced into the hair introduction hole 2 on the surface of the protruding curved surfaces 3b. When this skin becomes easier to be introduced, the hair also becomes easier to enter into the hair introduction hole 2.
Even if the bristles are somewhat narrow, the bristles themselves are thin, and there are two curved parts 3a.
, 3b, so that it is exposed from below the hair introduction hole 2.

However, the skin is formed by the protruding curved surface 3b of the lip portion 3 and the first curved surface portion 3.
The step portion 5 formed at the boundary with the hair a is prevented from entering deeply into the hair introduction hole 2, and the first curved surface portion 38
Since the gap is narrow (), the skin will not reach the inner cutter (not shown) located below the outer cutter 1, and the skin will not be damaged by the inner cutter.Furthermore, due to the presence of the protruding curved surface 3b, the skin will not reach the inner cutter (not shown) located below the outer cutter 1. The contact area between the outer cutter 1 and the outer cutter 1 is reduced, and the slippage and contact feeling of the outer cutter 1 against the skin are improved.

Next, a method of manufacturing the above-mentioned outer cutter 1 will be explained.

As shown in FIG. 4, a resist film 11 is placed on an aluminum substrate 10 at a location corresponding to the elongated hair introduction hole of the outer blade.
is printed and subjected to second resist treatment, first electrodeposition is performed on the aluminum substrate 10, and resist) Jl! iE1
A 1-missing electroforming 12 is formed at a location where 1 is not present.

After this first electrodeposition, as shown in FIG. 5, a second electrodeposition is performed to form a second electroform 13 on the first electroform 12.

After the second electrodeposition, a resist 14 is placed on the second electroforming 13.
A second resist process is performed by coating the secondary layer mold 3, and a polishing removal process or a removal process using a photoresist is performed so as to expose the upper surface of the secondary layer casting 3. After this polishing removal process and photoresist removal process, tertiary layer deposition is performed and secondary electroforming 1
3. A tertiary electroforming 15 having a protruding curved surface is formed on the upper part.

After this tertiary layer deposition, when the secondary electroforming 13 and tertiary electroforming 15 are peeled off from the primary electroforming 12, the secondary electroforming 13 and 3
Next, the outer cutter 1 is formed by electroforming 15.

In the above embodiment, the grid-like lip portions 3 as shown in FIG. 2 can be formed by performing the resist polishing process described above. It is also possible to simply form a protruding curved surface 3b having approximately the same length as the hair introduction hole 2 only between the sides of the hair introduction hole 2, but in this case, it is sufficient to perform a partial removal process using photoresist or the like. .

In addition, in the above-described embodiment, if the electrical restraint is formed so that the height Dl of the protrusion 3 shown in FIG. 1(b) is equal to the height D2 of the lip portion 3 shown in FIG. As with electroforming, the thickness of the protruding curved surface 3b is thick (...), so the progress of electroforming at the bottom is delayed compared to the top of the lip part 3, and therefore, as shown in Fig. 1(b)
The rake angle α2 of the rib portion 3 can be made larger than the rake angle α1 of the protrusion 3 shown in FIG. Therefore, the outer cutter 1 can improve hair cutting efficiency due to its relationship with the inner cutter.

Furthermore, as shown in FIG.
Let the radii of the protruding curved surface 3b, which is the curved surface portion of The skin F within the hair introduction hole 2 is locally strongly pushed out using the curved surface portion 3a of the hair introduction hole 2.

It makes it easier to squeeze out the hair root and allows it to be cut from the hair root.

Further, as one of the methods for manufacturing the above-mentioned outer cutter 1, press molding is also possible, and in this case, the cross-sectional thickness of the outer cutter 1 becomes uniform.

As described above, according to the present invention, the protruding curved surface makes it easy for hair to enter the hair introduction hole, so-called deep shaving is possible, and the lip portion prevents the skin from entering the hair introduction hole too much. It is possible to provide an outer cutter for an electric shaver that does not damage the skin with the inner cutter, and furthermore, the presence of the protruding curved surface improves the sliding between the outer cutter and the skin, making it extremely comfortable to use.

[Brief explanation of the drawing]

FIG. 1(a) is a top view showing a conventional example, FIG. 1(b) is a sectional view of the conventional example, FIG. 2 is a top view showing an embodiment of the present invention, and FIG. 3 is a top view of the same embodiment. Cross-sectional view of Figure 4, Figure 5, Figure 6
The figure is an explanatory diagram showing the manufacturing process of the same embodiment, and FIG. 7 is a sectional view of another embodiment. 1... Outer blade, 2... Hair introduction hole, 3...
...Rip portion, 3b...Protruding curved surface. 10th Figure 3 2. Figure 4 O Figure 5 Figure 6

Claims (1)

[Claims] An outer blade of a sleepy razor characterized by forming a protruding curved surface in the center of the lip between the elongated hair introduction holes.