JPS6147917B2 - - Google Patents

Description

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

In general, the outer blade of this type of razor consists of an electrodeposited layer formed on the main surface of a plate-shaped matrix, an outer blade base made by peeling off the electrodeposited layer from the matrix, and a blade holder for this base. It is manufactured by separately preparing a reinforcing plate that also serves as a mounting bracket for attaching to the blade, and then fixing the outer cutter base and the reinforcing plate by mechanical means using rivets or the like. However, with this method, the work of fixing the reinforcing plate to the outer blade base is troublesome;
Moreover, there is a risk that the outer cutter base body may be distorted and deformed when it is fixed.

For this reason, when forming the outer blade base on the main surface of the matrix by electrodeposition, a reinforcing plate is placed on the matrix, and this reinforcing plate is also electrodeposited with electrodeposited metal at the same time. That is, a method has been proposed in which the outer cutter base and the reinforcing plate are integrated, thereby avoiding mechanical fixing means and attempting to solve the above-mentioned drawbacks.

However, even in this method, the reinforcing plate is prepared separately, which increases the number of parts.Moreover, the reinforcing plate must be firmly positioned and held with respect to the mother mold, which may cause the reinforcing plate to shift from its set position. If it is electrodeposited as is, it will be difficult to attach the outer cutter base to the outer cutter holder, and even if it is attached, there is a risk that the attached state will be unstable. Furthermore, if gaps exist due to misalignment of the reinforcing plate with respect to the matrix, not only will it be difficult for the current to flow during electrodeposition, resulting in uneven electrodeposition, but if the electrodeposited metal gets into the gaps, it will be difficult to A depression is formed in the blade base, and the blade loses its proper shearing function as an outer blade.

Therefore, this invention solves the above-mentioned drawbacks by separating a part of the final electrodeposition layer from the plate-shaped electrodeposition matrix and integrating it with the electrodeposition layer. This is what I did.

The manufacturing method of the present invention will be explained below with reference to the drawings.

FIG. 1 shows an outer cutter obtained by the manufacturing method of the present invention, in which 1 is an outer cutter base having a large number of hair introduction holes 2, and 3 is fixed to both ends of the outer cutter base 1. This reinforcing plate also serves as a mounting bracket for the outer blade holder (not shown). 4 is a mounting hole.

Next, the method for manufacturing the above-mentioned outer cutter will be explained step by step.

First, as shown in FIG. 2, a plate-shaped electrodeposition matrix 21 made of aluminum, brass, or the like is prepared, and cut grooves 22 are formed on the back surfaces of both ends 21a and 21b of this matrix 21, respectively. The thickness of the conductive plate for the mother mold is preferably about 0.5 mm to 1.5 mm. Next, on the main surface of the matrix 21, as shown in FIG.
After forming an electrically insulating thin film layer 23 having a pattern, a first electrodeposited layer 24 made of nickel or the like is formed on the insulating thin film layer 23 as shown in FIG. After this, a second layer is applied on the first electrodeposited layer 24.
The second electrodeposited layer 25 is formed, but prior to this, the cut grooves 2 on the surface of the first electrodeposited layer 24 are
The peeling process is performed only on the area S between 2 and 22. After this peeling treatment, the first electrodeposited layer 24
A second electrodeposited layer 25 made of nickel or the like is formed thereon as shown in FIG. This second electrodeposited layer 25 constitutes the outer blade base 1. Finally, the second electrodeposition layer 25 is peeled off from the first electrodeposition layer 24, but at this time, as shown in FIG. If both ends 21a and 21b of the mold 21 are peeled off together with the second electrodeposited layer 25, the ends 21a and 21b are configured as the reinforcing plate 3, and the outer cutter shown in FIG. 1 is obtained.

When peeling off the second electrodeposited layer 25, this second
Since the peeling treatment is performed prior to forming the next electrodeposited layer 25, the peeling described above can be carried out easily. Both ends 21a, 21b of the matrix 21 are integrated with the second electrodeposition layer 25 via the first electrodeposition layer 24, so that when peeling, the ends 21a, 21b are
21b remains on the mother mold 21 side, but in order to ensure reliability, both end surfaces 21c,
21d is preferably formed in a reversely inclined shape as shown in the figure.

As described above, according to the present invention, both ends of the plate-like matrix are separated after the final electrodeposition and peeled off from the matrix side together with the final electrodeposition layer, thereby forming the final electrodeposition layer, that is, the outer blade. Since it is integrated into the base, there is no need to prepare a separate reinforcing plate, and the number of parts can be reduced, and in particular, a positioning and holding means is introduced to accurately and firmly hold the reinforcing plate on the matrix, unlike conventional methods. Workability is improved without the need for this, and there is no risk of the reinforcing plate being misaligned with respect to the matrix as in the past. Therefore, when forming the electrodeposited layer, the current flows smoothly and uneven electrodeposition does not occur, and a proper outer blade base is formed, and the reinforcing plate can be firmly and easily placed in the set position of the outer blade base. It can be fixed, and therefore it can be smoothly attached to the outer cutter holder.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an outer cutter of a reciprocating electric shaver obtained by the manufacturing method of the present invention, and FIGS. 2 to 6 are sectional views showing an example of the same manufacturing method in the order of steps. 1... Outer blade base, 3, 3... Reinforcement plate, 21...
Electrodeposition matrix, 21a, 21b...Both ends, 22, 2
2... Cut groove, 25... Final electrodeposition layer, S... Peeling treatment area.

Claims (1)

[Claims] 1. Cut grooves 22 are formed on the back surfaces of both ends 21a and 21b of the plate-shaped electrodeposition matrix 21, and the matrix 2
Prior to forming the final electrodeposition layer 25 on the main surface side of 1, a peeling treatment is performed on the area S between the two notch grooves 22, 22 on the main surface side, and then the final electrodeposition is performed, Next, this final electrodeposited layer 25 is peeled off from the mother die 21 side as the outer cutter base 1, and at the same time, both the cut grooves 22, 22 are separated, and both ends 21a, 21b of the mother die 21 are also separated from the outer cutter base 1. A method for manufacturing an outer cutter for a reciprocating electric shaver, in which both end portions 21a and 21b are used as reinforcing plates 3 and 3 of the outer cutter base 1.