JPS63102787A - Reticulated outer blade of electric razor - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a mesh outer cutter for an electric shaver.

[Conventional technology]

As this type of mesh outer cutter, the present applicant previously proposed an outer cutter that has both a thin hair introduction hole area and a thicker hair introduction hole area (for example, in the patent application 1986-1
No. 48685). According to this, it is possible to achieve a close shave while ensuring the strength of the outer blade. Also, people who don't get tired of razors can get a close shave by focusing on the thin hair introduction hole area, and people who don't like razors can remove the thin hair introduction hole area and focus on the thick hair introduction hole area. It has the advantage of being able to shave without irritation if used regularly.

[Problem that the invention seeks to solve]

However, just by looking at the appearance of the outer cutter, it is difficult to distinguish between the thin hair introduction hole region and the thicker hair introduction hole region, so in reality, it is not easy to use them properly.

This invention is intended to solve such problems.
The purpose is to make it possible to clearly distinguish between areas on the outer blade that can be shaved closely and areas that cannot be shaved, making it easier to use the razor according to the difference in skin type between those who are prone to shaving and those who are not. shall be.

[Means for solving problems]

This invention has a mesh-like outer cutter having a thin hair introduction hole region A and a thicker hair introduction hole region B on the surfaces of said region A and region B.

A display means that can identify both areas A and B is provided.

Here, the shape and size of the hair introduction hole 1 in the thin hair introduction hole area A, and the hair introduction hole 3 in the thicker hair introduction area B.
The shapes and sizes of can be the same or different.

Identification and display means for areas A-B include color-coding, brightness, or different patterns on the surface of area A and area B, and other measures such as interference of light on the surface of area A-B. What is necessary is just to make it possible to optically distinguish both areas A and B by using refraction or refraction.

[Function] When you want a close shave, focus on the thin hair introduction hole area A of the outer blade against your skin.

Furthermore, when shaving to a normal depth, the hair introduction hole region B, which is thicker than that, should be pressed intensively against the skin while shaving. Further, these areas A-B can be easily identified by identification display means provided on their surfaces, and their use can be easily performed.

For example, the hair introduction hole 1 of the hair introduction hole area A is made thin.
The shape and size of the hair introduction hole 3 in the thicker hair introduction hole area B are different from that of the hair introduction hole 3 in the thicker hair introduction hole region B. The hole should be large in width and short in length.

Even in the case where the latter hair introduction hole 3 is relatively small in width and long in length, the hair introduction hole 1 in the thin hair introduction hole area A can shave hair closely from the root. ,
The hair introduction hole 3 in the hair introduction hole area B is thick, so that the skin sagging can be reduced to the extent that the hair introduction hole 3 in the hair introduction hole area B is thick, and long hair does not get irritated and the shaving quality is improved.

The shapes of the hair introduction holes 1 in the hair introduction hole region A, which are thin, and the hair introduction holes 3 in the hair introduction hole region B, which are thicker.

Even though the sizes are different, in many cases the shape and size of these holes can only be clearly distinguished when viewed with a magnifying glass. It is difficult to identify the alignment area A-B just by being different, so in this case as well.

By providing an identification display means on the surface of the area A-B, it is possible to easily identify it with the naked eye.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

Figure 1 shows an example of the outer blade of a vibrating electric shaver, in which the outer blade is located at the center in the front-rear direction (direction perpendicular to the direction of vibration of the inner blade that vibrates on the inner surface of the outer blade; the same applies hereinafter). In the area A, a large number of relatively wide and short hair introduction holes 1 and ribs 2 between the hair introduction holes 1 and 1 are formed over almost the entire length in the left-right direction (inner blade vibration direction, hereinafter the same). and the area A
an area B-B in which hair introduction holes 3 are arranged in a staggered manner in the left-right direction, each obliquely intersecting the left-right direction at a predetermined angle with respect to the left-right direction, and having hair introduction holes 3 longer than the length of the hair introduction holes 1; Further forward and rearward of the region B are micropore regions C-C in which countless micropores 4 are formed to the extent that no hair can be introduced, and in the periphery surrounding these regions A-B-C, It forms a sticky area.

As shown in FIG. 3(al(b)), the thickness tl of the area A where the short hair introduction holes 1 of this outer blade are arranged is greater than the thickness t2 of the area B where the long hair introduction holes 3 are arranged. Specifically, the thickness tl of region A is 40 to 50.
μm, preferably 45 μm, thickness t2 of other region B is 5
The thickness is set at 5 to 65 μm, preferably 55 μm. The thickness of each of the front and rear micropore regions C-C is 40 to 48 μm, and the plate thickness of the solid portion is 35 to 45 μm.

The surface of region B of the outer cutter is left as the shiny surface of the outer cutter metal, and the surface of region A is plated with gold, which is different in color from the metal, so that both regions A and B can be distinguished.

Incidentally, as shown in FIG. 4, the fine hole region C-C has the effect of being bent uniformly when the outer cutter is attached to an electric shaver in an arched cross-section.

The aim is to increase the strength by increasing the moment of inertia of the area.

Next, an example of a method for manufacturing an outer cutter having the area A-B having the above configuration will be described. Here, electroforming is used.

First, as shown in Figure 2 (al), a conductive electroforming master mold 1
0, an electrical insulating film 1) having a pattern corresponding to the hair introduction holes 1 in the thin hair introduction hole region A is formed, and a notch 12 is formed in each electrical insulating film 1). This notch 1
2 is for making the thickness tl of the region A thinner than the thickness t2 of the other region B, as will be described later. The electrical insulating film 1) is formed, as is well known, by coating or pasting a photoresist on the surface of the electroforming mold 10, partially exposing it to light using a mask, and developing it.

Next, the electroforming mother mold 10 on which the electrical insulating film 1) has been formed is immersed in an electrodeposition bath (not shown) to perform the first assembly, and the mother mold is formed as shown in FIG. 2('b). A first blow mold deposited layer 13 having a thickness exceeding the thickness of the electrical insulating film 1) is formed on the surface S not covered by the electrical insulating film 1), that is, the conductive surface of the matrix 10.

This first blow-type dressing allows the notch 12 to
A so-called sacrificial electrodeposition portion 14 is formed.

Next, the mother mold 10 is immersed in an aqueous solution such as potassium dichromate to perform a peeling treatment on the surface of the first assembled eyebrow 13, and then a full-flexure material such as nickel or an alloy of nickel and cobalt is applied. A second electrodeposition is performed to form a second blizzard adhesion layer 15, which will become the ribs 2 between the hair introduction holes 1 and 1, on the surface of the first attachment layer 130, as shown in FIG. 2(C). This second
Also by electrodeposition, the electrodeposition part 16 is formed on the above-mentioned disposable electrodeposition part 14.
is formed.

Area B is also electroformed on the same matrix 10 at the same time, but
In the electrodeposition of this region B, as shown in FIG. 5, no sacrificial electrodeposited portion is formed.

Finally, when the matrix 10 is lifted out of the electrodeposition tank and the secondary bonded eyebrows 15 are peeled off from the peeling surface of the primary bonded eyebrows 1ii13, hairs are introduced as shown in FIG. 2 (d+) and FIG. An outer cutter having a chemical process 3. and a rib 2 having a countersink 17 on the inner surface is obtained.

When the second blowing snow deposit layer 15 in area A is peeled off, since the sacrificial electrodeposition parts 14 and 16 are formed within the portion that will become the hair introduction hole I, the second blow mold deposition layer 15 is removed from the matrix 10 side along with the first blow mold deposition layer 13. left behind.

In this case, as shown in FIG. 3, the thickness tl of region A becomes thinner than the thickness t2 of region B by the amount of electrodeposited portions 14 and 16.

That is, in the electrodeposition method, the amount of electrodeposition per unit area is almost constant, and therefore, by forming the sacrificial electrodeposition parts 14 and 16 in area A as described above, the electrodeposition area per unit area can be reduced. If it is increased more than that in area B, the electrodeposition thickness in area A, that is, the thickness of the rib 2, will be thinner than that in area B. This is because the thickness of the rib 2 is proportional to the electrodeposition thickness, and as the electrodeposition thickness becomes thinner, the rib thickness becomes smaller.

To prevent changes in mechanical strength and poor contact with the inner cutter due to sudden changes in the thickness of the boundary between area A and area B, the thickness of the outer periphery of area A is gradually increased to the thickness of area B. It is preferable to get close to . This can be done by setting the opening area of the notch 12 which becomes the sacrificial electrodeposited parts 14 and 16 on the outer periphery of area A to be gradually smaller as it approaches area B in the electroforming method described above.

Note that after the electroforming, only the surface of area A is plated with gold.

Examples according to C] FIGS. 6(a) to C) are all for the hair introduction hole area A.
FIG. 6(a) shows another example of how the blades B are arranged, and FIG. 6(a) shows an arrangement in which the outer cutter is sectioned in the left-right direction, with area A on one side and area B on the other side. FIG. 6 (bl is a section of the outer cutter in the front-rear direction) arranged so that a region A exists on one side and a region B exists on the other side.

Figure 6 (C) shows area A by dividing the top of the outer cutter into four equal parts, front, back, left and right.
Areas A and areas B and B are arranged side by side in the diagonal direction of the outer blade.

Also, as an identification display means for the surface of area A-B.

In addition to color-coding, for example, one of the surfaces of areas A-H may be colored with a light color and the other with a dark color, or one may be colored with many small holes that do not allow hair to enter (see the enlarged view in Figure 1). (indicated by symbol P), and when the outer cutter is attached, the dark area inside the outer cutter can be seen from the outside.

The surface may have a darker color than the other surface without the small holes.

〔Effect of the invention〕

According to the present invention, since the outer blade has both the thin hair introduction hole region A and the thicker hair introduction hole region B, the thin hair introduction hole region A allows hair to be removed from the roots. This allows for a closer shave, and a shallower shave with the thicker hair introduction hole area B, and when looking at the mechanical strength of the entire outer blade, the thickness of the hair introduction hole area A is thinner. Even though
Due to the presence of the hair introduction hole region B which is thicker than the thickness of the hair introduction hole region B, sufficient mechanical strength can be ensured.

Moreover, the present invention has a thin hair introduction hole area A.

Since the identification display means is provided on the surface of the thicker hair introduction hole area B, the two areas A and B can be clearly distinguished at a glance, making it easy to use them according to skin type. The design effect of the blade can also be achieved.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, in which FIG. 1 is a plan view of the outer cutter, and FIG. 2 is a plan view of the outer cutter.
1.(di is the manufacturing process diagram for the outer blade area by electroforming method,
3(a) and 3(b) are cross-sectional views showing a comparison of the thickness of the area A-B of the outer cutter, FIG. 4 is a partial external perspective view of the electric shaver showing the outer cutter installed state, and FIG. The figure is a sectional view showing a manufacturing process diagram of region B of the outer cutter, corresponding to FIG. 2(C). Figures 6 (al, (b), and (C) are all plan views showing modified examples of how the regions A-B of the outer cutter of the present invention are arranged. 1.3... Hair introduction holes. 2. ... Rib. A-B ... Hair introduction hole area.

Claims (3)

[Claims] (1) Thin hair introduction hole area A and thickness t of the area A
It also has a hair introduction hole area B that is thicker than _1,
The mesh outer blade of an electric shaver is further provided with display means for identifying the areas A and B on the surfaces of the areas A and B. (2) The mesh outer blade of an electric shaver according to claim 1, wherein the display means applies different colors to the surfaces of the area A and area B. (3) A mesh-shaped outer cutter for an electric shaver according to claim 1, wherein the display means brightens and darkens the surfaces of the areas A and B.