JPH0464720B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an outer blade for a reciprocating electric razor in which blade holes are arranged in the shape of a parallelogram with its acute apex cut off.

[Conventional technology]

In order to improve the sharpness of an electric razor, firstly, when the outer blade is applied to the skin, more hair is introduced into the blade hole provided in the outer blade, and secondly, as mentioned above, , to cut all the hair introduced into the blade hole provided in the outer blade.

As shown in FIGS. 2 and 3, conventional outer cutters have round or hexagonal cutting holes.

[Problem to be solved by the invention]

As shown in Fig. 2, the round blade hole 9 is inserted into the outer blade 1.
When arranged on the top, no matter how efficient and efficient the arrangement is, the beams 10 existing between the adjacent blade holes 9
The width of the outer cutter 1 is not uniform, and when looking at the entire surface of the outer cutter 1 in which the circular cutter holes 9 are arranged, the proportion of the cutter holes 9 is small. That is, when the outer cutter 1 is applied to the skin, The amount of whiskers introduced into the holes 9 is reduced. Further, the scissor angle θ ¹¹ determined by the inner cutter 2 and the side 11 of the cutter hole 9 changes continuously within the range of 0° to 90° as the inner cutter 2 moves. Hair introduced into the blade hole with an appropriate scissor angle is fixed and cut, so in the round-shaped blade hole 9, the hair introduced into the blade hole is not fixed and moves. The hair introduced into the blade hole 9 may escape from the blade hole 9, resulting in a large amount of hair remaining unshaved, or the movement of the hair may cause so-called tension during shaving, causing discomfort to the user. , it was inferior in terms of usability.

As shown in FIG. 3, when hexagonal blade holes 12 are arranged on the outer cutter 1, the width of the beam 13 existing between adjacent blade holes 12 is always constant at any point, and the width of the blade hole 1
2 can be arranged efficiently. However, as shown in FIG. 4, for example, the scissor angle is the same as that of the hexagonal blade hole 12. When comparing the parallelogram-shaped blade hole 16 with the distance W between the sides in the vibration direction of the inner cutter 2 and the distance L between the sides in the direction perpendicular to the vibration direction of the inner cutter 2 being the same as those of the hexagonal blade hole 12, the blade hole The area of the hexagonal blade hole 12 is considerably smaller.
From the viewpoint of suppressing the amount of movement of the whiskers introduced into the blade hole and preventing damage to the skin due to skin digging into the blade hole, W and l cannot be larger than a certain value, so the hexagonal shape is The blade hole 12 is the outer blade 1
However, the area of each of the blade holes 12 is small, and the area occupied by the blade holes 12 on the entire surface of the outer cutter 1 becomes small. The amount of whiskers introduced into the blade hole 12 when applied to the skin is reduced. In addition, in the case of the hexagonal blade hole 12, the scissor angles θ ¹⁴ and θ 15 determined by the inner blade 2 and the sides 14 and ¹⁵ are
can be set to an appropriate value to fix the beard introduced into the blade hole 12.Since the hexagonal blade holes 12 at the same position are continuous over the entire surface of the outer blade 1, when the electric razor is moved during use. Both long and short beards are cut at the same location and with the same shape of the blade hole, resulting in poor shaving efficiency and a large number of unshaved beards. Therefore, even in the case of an outer cutter having a hexagonal cutter hole, the cutting quality was poor.

[Means to solve the problem]

The present invention eliminates this problem, and its purpose is to provide an outer blade of a reciprocating electric razor that can catch beards well and cut off all the caught beards.

Here, as shown in FIG. 5, scissor angles θ 18 and θ ¹⁹ formed between the ^short side 18 and long side 19 of the parallelogram-shaped blade hole 17 and the inner cutter 2 are introduced into the round hole 17. The blade holes 17 are arranged at regular intervals in a direction perpendicular to the vibration direction of the inner cutter 2, and the short side 18 and long side 19 of the blade hole 17 are The short side 21 of the blade hole 20 arranged in reverse positions corresponds to the long side 19 of the blade hole 17, and the long side 22 of the blade hole 20 corresponds to the short side 18 of the blade hole 17, respectively. Considering the outer cutter 1 which is made up of a plurality of arrayed blade holes 20, the width of the beam 23 existing between adjacent blade holes is always constant at any point, making it possible to efficiently arrange the blade holes. As mentioned above, the area of the blade hole itself can be made larger compared to the hexagonal blade hole, so the ratio of the blade hole to the entire surface of the outer blade 1 becomes larger, and more hairs can be introduced into the blade hole. be able to. In addition, the sides 18, 19, 21, 22 of the blade holes 17, 20 are at appropriate angles so that the whiskers introduced into the blade holes can be fixed, and the orientation of the blade holes is also aligned with the vibration direction of the inner blade 2. Since the blades are different from each other, it is possible to reliably fix the long beard, etc. introduced into the blade hole and shave off all the hair.

However, at the acute apex A of the parallelogram inner holes 17 and 20, when the outer blade 1 is applied to the skin during shaving, the skin is pushed up by the beams 23 on both sides, and the hair that has been introduced into the apex A is pushed up by the beams 23 on both sides. It is impossible to cut from the root, resulting in a lot of unshaved hair. That is, the apex portion A does not actually serve as a blade hole for cutting hair.

〔Example〕

Therefore, the present invention will be explained based on examples.

The outer blade of the reciprocating electric razor of the present invention has a blade hole 3 in the shape of a parallelogram with the acute apex cut off, and a scissor angle θ ⁴ between the short side 4 and the inner side 2 that make up the cut off shape, and the length The long side 5 is formed adjacent to the short side 4 so that the scissoring angle θ ⁵ between the side 5 and the inner side 2 is the same, and the long side 5 is formed at a constant interval in the direction perpendicular to the vibration direction of the inner cutter 2 and is the same as the inner hole 3. The blade holes of the shape are arranged, and in the blade hole arranged on the vibration direction side of the inner blade 2 in contact with the blade hole 3, the short side 4 and the long side 5 of the blade hole 3 are arranged in opposite positions. The short side 8 of the blade hole 6 is connected to the long side 5 of the blade hole 3, and the long side 7 of the blade hole 6 is connected to the blade hole 3.
It is characterized in that a large number of blade holes 6 are arranged so as to correspond to the short sides 4 of the blade holes adjacent to each other. In FIG. 1, the blade holes 3 and 6 have the shape of the parallelogram-shaped blade hole shown in FIG.
The blade holes are arranged in the same way as the parallelogram-shaped blade holes shown in the figure, and the blade holes occupy a large proportion of the entire surface of the outer blade 1, and when the outer blade 1 is applied to the skin, the blade holes 3 and 6
The amount of whiskers introduced into the blade holes 3 and 6 increases, and the scissor angles θ ⁴ , θ ^{5 , θ 7 , θ 8 determined by the sides 4, 5} , ⁷ , 8 and the inner side 2 of the blade holes 3 and ⁶ are the same as the blade holes 3. , 4 is at an appropriate angle to fix the whiskers introduced in the blade holes 3, 6.
The directions of the blades are not all the same, and the whiskers introduced into the blade holes 3 and 6 are securely fixed regardless of the type of whiskers, long or short.
disconnected. In other words, the beard can be captured well, and all the captured beard can be cut off.

〔Effect of the invention〕

As described above, the present invention not only improves sharpness by simply changing the shape of the cutter hole provided in the outer cutter, but also allows the outer cutter to be covered by the same cutter hole with a simple shape. , it has excellent effects such as not looking strange in appearance and giving a sense of security and trust to the user.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention. Figure 2 shows a conventional example. Figure 3 shows a hexagonal blade hole. Figures 4 and 5 show parallelogram-shaped blade holes. 1... Outer blade, 2... Inner blade, 3, 6... Blade hole,
4, 5, 7, 8... sides, θ ⁴ , θ ⁵ , θ ⁷ , θ ⁸ ... scissor angles.

Claims (1)

[Claims] 1 A scissor angle θ between the short side 4 and the inner blade 2 that constitutes the cut-off shape of the blade hole 3, which has a shape obtained by cutting off the acute vertex of a parallelogram ⁴ , and a scissor angle θ between the long side 5 and the inner blade 2 A long side ⁵ is formed adjacent to the short side 4 so that 5 is the same, and blade holes having the same shape as the blade hole 3 are arranged at regular intervals in a direction perpendicular to the vibration direction of the inner blade 2, and the blade hole 3, the short side 8 of the blade hole 6 is arranged so that the positions of the short side 4 and the long side 5 of the blade hole 3 are reversed in the blade hole placed on the vibration direction side of the inner cutter 2. 3, and the long side 7 of the blade hole 6.
An outer blade for a reciprocating electric razor, characterized in that a large number of blade holes 6 are arranged so as to correspond to the short sides 4 of the blade holes adjacent to the blade holes 3.