JPH06182063A - Outer blade of reciprocation type electric razor - Google Patents

Abstract

PURPOSE:To provide a skirt part with sufficient strength by reducing a difference of a blade thickness between a top part and the skirt part in the outer blade formed on the surface of a matrix with a roughly inverted U-shaped cross section by a electrodeposition method. CONSTITUTION:In an outer blade which has a roughly inverted U-shaped cross section with numerous blade holes 2 for guiding beard and formed on the surface of a matrix with a roughly inverted U-shaped cross section by an electrodeposition method. a skirt part is provided with a notch 4 or the skirt part is provided numerous holes 5. The area of the skirt part is reduced with the notch and a number of holes to ensure a sufficient current density in the electrodeposition thereby eliminating reduction in the blade thickness of the skirt part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating electric shaver outer blade, and more particularly to an outer blade formed by an electroforming method.

[0002]

2. Description of the Related Art As a method of manufacturing an outer blade of an electric razor, which is made of a thin metal plate and has a large number of beard-introducing blade holes, a resist is formed on the surface of a mother die made of aluminum or the like and primary plating is added. There is an electroforming method in which an outer blade is formed by performing electroforming after performing. Since the outer blade formed by this electroforming method cannot be curved after being manufactured, when forming an outer blade having a substantially inverted U-shaped cross section, the mother having a substantially inverted U-shaped cross section is used. It is manufactured by performing electroforming on the mold surface.

[0003]

However, when electroforming is performed using a master die having the above-described cross-sectional shape, the distance between the skirt and the electrode becomes longer than the distance between the top and the electrode. As a result, the thickness of the hem of the finished outer blade is smaller than that of the top, and the problem is that the strength of the hem of the outer blade used for attachment to the outer blade frame decreases. Has become.

The present invention has been made in view of the above points, and an object of the present invention is to provide a top portion and a hem portion in the one formed by an electroforming method on the surface of a mother die having a substantially U-shaped cross section. An outer blade of a reciprocating electric razor having a small blade thickness difference and a hem having sufficient strength.

[0005]

SUMMARY OF THE INVENTION The present invention, however, has a large number of beard-introducing blade holes and a substantially inverted U-shaped cross-section, and has a substantially inverted U-shaped cross section. What is formed by the casting method is characterized in that it has a notch in the hem or has many holes in the hem.

[0006]

According to the present invention, since the area of the skirt is reduced by the notches and the large number of holes, it is possible to secure a sufficient current density during electroforming and reduce the blade thickness. There is no such thing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 is a developed view of an outer cutter 1 according to one embodiment, and FIG. The shape is inverted U
The illustrated outer blade 1 not only has a letter shape, but also has a curved shape in the longitudinal direction. The outer blade 1 has a large number of beard-introducing blade holes 2 at the top thereof, and a hem in the lateral direction. The portion has a mounting hole 3 for mounting on an outer blade frame (not shown). In addition, a plurality of notches 4 and a large number of holes 5 are provided at the hem.
It has and.

The outer cutter 1 is formed by electroforming on the surface of the mother die having a shape matching the shape of the outer cutter 1 shown in FIG. The cutouts 4 and a large number of small holes 5 provided in the portion (to be exact, the portions for forming the cutouts 4 and the holes 5 on the surface of the mother die) have a small hem area, and therefore are formed by electroforming. The current density at the time increases, and for this reason, the blade thickness of the skirt can be made substantially the same as that of the top. In this embodiment, the notch 4 and the multiple holes 5 are provided, but only one may be provided.

In the embodiment shown in FIG. 3, the mounting hole 3 is formed as a stepped hole in addition to the notch 4 and the large number of holes 5, that is, as shown in FIG. It is shown that the forming portion 63 of the mounting hole 3 in FIG. 2 is stepped so that the peripheral portion of the mounting hole 3 is thickened. In the figure, 61 is a resist, and 62 is primary plating.

In the embodiment shown in FIG. 5, the notch 4 is provided at the skirt and the skirt has a corrugated plate-shaped cross section to improve the strength.

[0011]

As described above, in the present invention, since the area of the skirt is reduced by the notches and the large number of holes,
A sufficient current density can be secured during electroforming, and the blade thickness does not decrease.For this reason, the hem can be made to have sufficient strength, and the hem is used. The attachment strength of the outer blade to the outer blade frame does not pose a problem.

[Brief description of drawings]

FIG. 1 is a development view of an embodiment.

FIG. 2 is a perspective view of the same.

FIG. 3 shows another example, (a) is a perspective view and (b) is AA.
It is a line sectional view.

4 (a), (b) and (c) are cross-sectional views showing a manufacturing process same as above.

FIG. 5 shows another example, (a) is a perspective view and (b) is B-.
It is a B line sectional view.

[Explanation of symbols]

 1 Outer blade 2 Blade hole 4 Notch 5 hole

Claims (2)

[Claims] 1. A method comprising a large number of beard-introducing blade holes and having a substantially inverted U-shaped cross-sectional shape, which is formed by an electroforming method on a mother die surface having a substantially inverted U-shaped cross section. An outer blade of a reciprocating electric razor, which has a notch on the hem. 2. A method comprising a large number of beard-introducing blade holes and having a substantially inverted U-shaped cross-sectional shape, which is formed by an electroforming method on the surface of a mother die having a substantially inverted U-shaped cross section. An outer blade of a reciprocating electric razor, which has a large number of holes in the hem.