JPS6115794Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of the mesh screen-like outer cutter of an electric shaver, and is characterized by the structure of the bristle-raising protrusions that protrude from the surface of the outer cutter.

Conventionally, as a mesh screen-like outer blade in an electric shaver, for example, an outer blade of a vibration type electric shaver shown in FIG. 1 has a large number of small hair introduction holes 1.
There is a type in which hair raising projections 2 and elongated hair introduction holes 3 are arranged alternately on both sides of the group. The hair raising projections 2 press against the skin surface during shaving,
By tensioning the skin held between the projections 2, 2, the hair lying on the skin surface is raised and reliably introduced into the hair introduction hole 3 between the projections 2, 2.

By the way, when the outer cutter is cast by electroforming using, for example, nickel, the above-mentioned bristling protrusion 2 is formed by a protrusion 5 provided on the mother die 4 as shown in FIG. Although it is cast integrally with the base plate 6, the thickness of the top portion 2a and the bottom portion 2b of the raising projection 2 obtained in this way are different, and the bottom portion 2b has a dangerous section with a thin thickness. arise.
Therefore, cracks were likely to occur in the thin hem portion 2b due to external force. Furthermore, in the case of an outer cutter obtained by pressing an ultra-thin stainless steel plate, the raising protrusion 2 is formed by partially pressing the outer cutter base plate 6, as shown in FIG. tends to become distorted due to residual stress and become uncomfortable to the touch.

This invention focuses on this fact and attempts to provide an outer blade for an electric shaver that does not cause cracks and has a smooth-touch raising protrusion.

The details will be explained below based on the drawings.

In Fig. 2, reference numeral 6 indicates the outer blade substrate of the electric shaver, which is either cast by electroforming using nickel or an alloy of nickel and cobalt, or made of ultra-thin (about 25 to 35 μm) stainless steel. By pressing the plate, it has one group of many small hair introduction holes in the center and three groups of elongated hair introduction holes arranged on both sides of the first group of hair introduction holes, as shown in Fig. 1. It is made in the form of a mesh screen. The hair introduction holes 1 and 3 on the surface of this outer blade substrate 6
An anti-oxidation coating film 7 is formed by applying an ultraviolet ray or electron beam curable resin to the other parts and curing it.
Further, on the anti-oxidation coating film 7 between the hair introduction holes 3, 3, an ultraviolet ray or electron beam curable resin is dropped and cured to form a round hair raising protrusion 8. The hair raising projections 8 and the hair introduction holes 3 are arranged alternately.

When the raising protrusion 8 is formed of a synthetic resin material in this way, cracks and distortions do not occur as in the raising protrusion 2 obtained by electroforming or press working as described above, and the shape is maintained. , a product with stable strength can be obtained, and the skin will not feel damaged.

In addition, among synthetic resins, especially ultraviolet or electron beam curable resins are used, which not only shortens the curing time, but also allows the outer blade substrate 6 to be cured with almost no heat. There is no thermal effect such as crystal sizing.

The raising projections 8 made of ultraviolet or electron beam curable resin are directly applied to the surface of the outer blade substrate 6.
Although it may be adhesively cured, when it is formed on the antioxidant coating film 7 made of resin as in the above example,
If the resin coating film 7 is colored and the raised protrusions 8 are made transparent, a design effect can be obtained in which the raised protrusions 8 exhibit a lens effect and the color stands out in the protrusions 8. .

Further, the bristling protrusion 8 is not limited to a hemispherical shape, as shown in FIG. In order to further increase the adhesion and bonding force, fine through holes 9 are formed in advance at the positions where the protrusions 8 or protrusions 8' are to be formed.
, and then embed the lower part of the cured resin and harden it. In this case, if the cured resin is transparent, the inside of the outer blade can be easily seen.

As explained above, according to this invention, cracks can be prevented by simply forming the bristling protrusions 8 on both outer blade surfaces from an ultraviolet or electron beam curable resin material.
There is an advantage that a stable hair raising protrusion 8 that is free from distortion and has a good texture can be easily obtained.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an expanded version of an example of the outer blade of a vibrating electric shaver, Fig. 2 is an enlarged cross-sectional view of essential parts showing an embodiment of the outer cutter according to this invention, and Fig. 3 is another modification. FIGS. 4 and 5 are enlarged sectional views of main parts of an outer cutter according to an embodiment, and FIGS. 4 and 5 are enlarged sectional views of main parts of a conventional outer cutter. 1, 3...Bristle introduction hole, 2...Conventional bristling protrusion, 6...Outer blade substrate, 7...Anti-oxidation coating film, 8,
8'...Protrusion for raising hair according to this invention.

Claims (1)

[Scope of utility model registration request] An electric shaver having a mesh screen-like outer blade having bristling protrusions 8 protruding from the surface thereof, wherein the bristling protrusions 8 are made of an ultraviolet or electron beam curable resin material. Outer blade.