JPS62596Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outer cutter of an electric shaver, and relates to a shape of a solid portion of the outer cutter having no whisker introduction holes.

The outer blade of a conventional electric shaver, regardless of whether it is a reciprocating type or a rotary type, has a large number of hair introduction holes formed by pressing or electrodeposition. However, the part of the outer blade where the beard introduction hole is drilled and the solid part without the beard introduction hole may be drawn into a dome shape like the outer blade of a rotary electric shaver or the outer blade of a reciprocating electric shaver. Similarly, there is a difference in strength due to the arch-like bending motion when the outer blade is attached, and when the outer blade is attached to the electric shaver body, the force along the inner blade that is in sliding contact with the inner surface of the outer blade is applied to the hair introduction hole. Since the difference occurs in the solid area, there is a problem in that the shaving taste differs on the outer blade, making it impossible to shave uniformly.

The present invention was developed in view of the above-mentioned drawbacks, and the purpose of the present invention is to provide an electric shaver outer blade that has uniform strength over the entire surface of the outer blade and can provide the same shaving effect on any part of the outer blade. It is something to do.

For this purpose, the present invention provides an outer blade for an electric shaver in which a hair introduction hole is formed approximately in the center of a thin metal plate. It has a configuration in which ribs are formed extending at the ends.

Therefore, suitable strength against drawing or bending is obtained for the solid portion, and the force exerted by the outer blade against the inner blade that slides against the inner surface of the outer blade is approximately uniform over the entire surface, which improves the shaving efficiency of the electric razor. can be improved. In addition, when the inner blade slides, the inner blade surface touches the solid part, and even if it moves from that point toward the hair introduction hole, the ribs reduce the thickness of the countersink protruding from the back surface of the hair introduction hole. This has the effect of preventing the inner cutter from colliding with the countersink and damaging the outer cutter.

An embodiment in which the present invention is applied to an outer cutter of a reciprocating electric shaver will be described in detail below with reference to the drawings.

1 is an outer blade of a reciprocating electric shaver according to an embodiment of the present invention. This outer cutter 1 is formed by an electrodeposition processing method which will be described later, and is provided with a whisker introduction hole portion 3 having a large number of decagonal whisker introduction holes 2, 2, etc. formed approximately in the center thereof.
On its outer periphery, small holes 4, 4... are bored in the longitudinal direction for attaching a resin support (not shown) for securing the outer cutter 1 to the outer cutter frame (not shown). Outer blade support parts 5, 5 and solid parts 6, 6 in which neither hair introduction holes 2, 2... nor small holes 4, 4... are provided are formed.

The solid portions 6, 6 are provided with wavy ribs 7, 7, . The thickness of the ribs 7, 7... is the same as the whisker introduction holes 2, 2...
The dimensions are the same as the lower ends of the countersink parts 8, 8.... Further, the ribs 7, 7, . . . are aligned at regular intervals.

Next, the process of forming such an outer cutter will be explained in detail with reference to FIG. 4.

A conductive metal substrate 9 having approximately the same area as the outer blade to be formed is prepared, and a resist 10 is applied to the surface of the substrate 9 by a pouring method or the like. When this resist 10 is exposed to light, only that portion is burned onto the surface of the substrate 9 and remains.

After drying the substrate 9 coated with the resist 10 and bringing the resist 10 into close contact with the substrate 9, a positive film on which a pattern of whisker introduction holes is drawn is brought into close contact with the surface of the resist 10, and then heated with a mercury lamp. etc. to expose to light. When this exposed substrate 9 was developed, the resist in the non-exposed areas was completely removed, and as shown in FIG. Something is completed.

When the substrate 9 thus produced is immersed in an electrolytic bath of nickel chloride or the like and energized for a short time, a thin primary plating layer 11 is obtained on the substrate 9 as shown in FIG. 4B.
Applying a release agent to the surface of this primary plating layer 11,
Furthermore, when electricity is applied for a long time in the electrolytic bath, a secondary plating layer 12 is formed overlapping the primary plating layer 11, as shown in FIG. Desired ribs 7, 7...
Alternatively, an outer cutter 1 having whisker introduction holes 2, 2, . . . is completed.

When the outer cutter is formed using this electrodeposition processing method, the hair introduction holes 2, 2... and the ribs 7, 7... are grown on the same substrate 9, so the same outer cutter can be formed without any particular grinding adjustment. The protrusion dimension from the inner surface is obtained.

As described above, the present invention provides an outer blade for an electric shaver in which a hair introduction hole is formed approximately at the center of a thin metal plate, in which a solid part of the outer blade where the hair introduction hole does not exist extends to the end of the outer blade. Since the ribs are formed, the strength against drawing or bending of the solid part is improved, and the force applied by the outer cutter to the inner cutter that slides against the inner surface of the outer cutter is applied to the entire surface of the outer cutter. As a result, the shaving efficiency of the electric razor is improved.

In addition, by providing the ribs on the solid part, when the inner blade slides, a step will occur at the boundary between the hair introduction hole and the solid part, and the inner cutter will collide with the step, causing damage to the inner and outer blades. This can be prevented and has extremely high practical effects.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an outer cutter of a reciprocating electric shaver according to an embodiment of the present invention, Fig. 2 is an enlarged view of section A in Fig. 1, and Fig. 3 is a sectional view taken along line B-B' in Fig. 2. Figure 4 I
C is an outer blade machining process diagram. 2, 2... Introduction hole, 1... Outer blade, 6, 6... Solid portion, 7, 7... Rib.

Claims (1)

[Scope of utility model registration request] In the outer blade of an electric shaver in which a hair introduction hole is formed approximately at the center of a thin metal plate, a rib extending to the end of the outer blade is formed in a solid part of the outer blade where the hair introduction hole does not exist. Features the outer blade of an electric razor.