JPS582301Y2 - Rotary electric razor outer blade - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an outer blade pattern in a rotary electric shaver.

Generally, the mesh blade of an electric razor is made of thin metal with many hair introduction holes, and its actions include introducing the hair, shearing the hair in cooperation with the inner blade, and giving a feeling to the skin when shaving. , which determines the sharpness performance.

The factors that determine the sharpness of the net blade include the width, length, and shape of the hair introduction hole, as well as the arrangement method and size, the aperture ratio, and thickness of the net blade.

Generally speaking, the best beard effect is to shear beards quickly, shortly, and without irritating the skin.

When moving the net blade over facial hair and capturing the beard with its forest-like introduction hole, if the introduction hole is rectangular, long hair,
It improves the ability to capture curly hair and allows you to shave it quickly.

The present invention is characterized in that the generation source is at the center of the net blade, and long holes are arranged along a spiral shape with a constant pitch, and the direction of the holes is parallel to the radiation coming out from the center. Shape processing is performed on the hole group near the end to make the thickness of the muscles and bones between the holes as uniform as possible, and to improve the appearance.

In addition to the above-mentioned ability to quickly warp, another feature of the present invention is that a convoluted muscle is formed by the arrangement of the holes, thereby applying external pressure to the surface of the net blade, and mechanical resistance to cooperation with the inner blade. Benefits include increased target strength.

Hereinafter, one embodiment of the present invention will be described based on the drawings.
1 is a hole group in which eight small holes 2, 2... are arranged in a circle in the central area of the outer cutter, and 3 is a long hole of the same length 4, 4... in the outer peripheral area of the outer cutter. . . . are hole groups arranged in a concentric row with the hole group 1 in the central area.

Then, in the space between these two hole groups 1 and 3, a single spiral line 5 is formed continuously from the center to the outer periphery, starting at a, and forming 10 turns in this embodiment.

Then, basically on the line of this spiral line 5, long holes 6, 6,
... are arranged in sequence at equal intervals in the radial direction.

Therefore, the muscle bone 7 formed between these long hole groups becomes a spiral muscle bone with a uniform thickness.

However, among this group of spiral long holes, each long hole 10' is located at the beginning of one turn 8 and the last one turn 9.

11... are processed in the shape as shown in FIG.

That is, from the long holes 6□, 6□, 63, etc., where the first winding ends and the second winding begins, to one place before the long hole 11a, where the final winding begins. Long hole 61□, 6.2
All the groups have the same length with their centers lying on the spiral line 5, but the lengths differ for each turn of 8.9 minutes at the beginning and end.

First of all, the diameter of each turn of the center area is gradually increased for about 10 turns up to the long hole 10 □ length 108 at the starting end.

Then, from the long hole 109, all the remaining holes are connected to the long hole 1 of the same length.
It would be better to fill it with 0, but if we do that, as shown in the enlarged view of Fig. 2, even if the muscle bones 12 between the center concentric hole group 1 gradually become thicker, they will become uneven. The long holes 102. ．． 10□3,102□・・・・・・1
The improvement is achieved by extending each piece to the inner circumferential side until reaching the virtual circle line 14.

Therefore, two circular muscle bones 15 and 13 are formed on the center side, and the mechanical strength is balanced.

Moreover, the appearance is also good. Next, the final 1/1 minute 9
As for the elongated hole 111 at the very end, all the elongated holes 11a starting from the elongated hole 11a extend uniformly toward the outer periphery, contrary to the elongated hole in the central area.

That is, it extends so that the circular muscle bone 16 is formed between it and the hole group 3 in the outer peripheral area.

In particular, the outermost elongated hole group 11.11...
..., at the beginning of the - turn, the two-part hole 11 is created by dividing the initially set elongated hole into two.
b, 11 b, 11 b', 11 b', 11 C',
110'... are arranged.

In the embodiment, the elongated holes 11 a and 1 are not divided into two parts.
1 b and 11 C are also mixed, but these may also be divided into two parts.

This is because if all the elongated holes are simply extended to the outer periphery, the longer the elongated holes are at the starting end, the greater the extension ratio will be, resulting in very long elongated holes 11, 11, etc. at the final end. Since the pattern form is discontinuous between the small elongated holes 111 and the small elongated holes 111 of the
The elongated holes 11 are divided so that they are arranged.

As described above, the present invention arranges hole groups concentrically at the center and outermost periphery, and forms a continuous spiral line from the center to the outer periphery on the intermediate surface of these hole groups. Since a large number of long holes are arranged radially on the spiral line, the muscle formed by these adjacent long holes becomes one continuous spiral muscle. The weak mechanical strength, which was a drawback of concentric muscles in those arranged in concentric circles, can be avoided, and if the holes are concentric,
There were parts of the inner blade that were worn out and parts that were relatively less worn, which caused the blade to spill.
If the holes are arranged in a spiral pattern, the entire blade surface will come into contact with the outer cutter hole uniformly during rotation, resulting in uniform contact and eliminating partial blade spillage.

Furthermore, if the holes are arranged in the form of a single spiral line, the thickness of the muscles may become uneven in the central area and the outermost area, or the size of the elongated holes may change. Although it may seem unsightly, in the present invention, this drawback is first addressed by one hole in the center area, and then from the end of the hole to the plurality of long holes, every other hole's length is applied to the inner circumferential side. The process is done so that the muscle bones and the concentric hole groups located inside the concentric hole group are extended into circular muscle bones with approximately the same thickness to prevent uneven muscle bones, and the final part of the outer peripheral area is - For all the turns, the elongated holes are now extended to the outer circumference in the opposite direction,
However, among the final parts, the multiple elongated holes at the beginning were simply extended to the outer periphery, making them somewhat longer and unsightly. At the beginning of the outermost turn, the long holes set at the beginning are divided into two, and the two-split holes are lined up, so that the overall pattern is that the long holes of the same length are lined up neatly in a spiral shape. , finished with sea urchin.

Therefore, with the present invention, the above-mentioned stable introduction of hair,
It is possible to achieve uniform mechanical strength and even wear on the inner cutter, and to provide an extremely good-looking outer cutter pattern with a spiral pattern.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic external view of the outer cutter pattern of the present invention, particularly showing the hole patterns in the center area and the outer peripheral area. FIG. 2 is an enlarged view of the hole shape treatment in the central area. 1... Group of small holes in the center area, 3... Group of small holes in the outer peripheral area, 6... Group of long holes in a spiral arrangement, 13
・・・・・・Central region circular muscle bone, 10□s, 10
23, 1021...Innermost circumferential elongated hole, 1
6... Circular muscle bone in the peripheral area, 11 a, 11
a'...Extension long hole, 11 b, 11 C, 11
b', 11 C'...Two-part hole.

Claims (1)

[Scope of utility model registration request] Groups of small holes are arranged concentrically in the center area and outer peripheral area, and elongated holes are arranged in a radial direction along a spiral line that continues from the virtual center to the outer periphery between the inner and outer concentric small hole groups. The long holes are arranged in sequence, and one turn of the innermost circumference of these spirally arranged long holes is appropriately extended to the inner circumferential side so that a circular muscle is formed between the small hole group in the central area. In one turn of the outermost periphery, it is uniformly extended toward the outer periphery so that a ring-shaped muscle is formed between the small holes in the outer peripheral area, and the -turn of the holes in the outermost area The outer blade of a rotary electric shaver is characterized by a line of two-part holes that divide it into two at the beginning of the blade.