JPS5931178Y2 - Rotary electric razor outer blade - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an outer blade for a rotary electric shaver with an improved pattern of hair introduction holes.

Conventional outer cutters of this type have a large number of long holes arranged in the circumferential direction adjacent to the small hole arrangement area of the outer cutter base, through which long hair can be easily introduced, and a straight sloped part on the inner wall of each long hole. It is known that a notch is formed and the long hair introduced into the elongated hole is cut diagonally while hitting the inclined part with the rotation of the inner blade.

However, according to the above configuration, long hair is captured and sheared in the long holes and becomes short hair, but unless the electric razor itself is frequently moved horizontally and vertically to trap it in the small holes, the hair will remain short and shaved. There are some drawbacks that remain.

Therefore, in this invention, the first elongated holes are disposed substantially radially on the outer cutter base so as to be inclined with respect to the sliding direction of the inner cutter, and each of the first elongated holes has a step-like linear inclined portion cut out in the inner wall on the outer end side. and a second group of elongated holes which are arranged substantially radially and inclined in the same direction as the first elongated holes, and each of which has a notch formed in the inner wall on the outer end side. By arranging long holes and second long holes alternately in the circumferential direction, the outer blade of the rotary electric shaver has a good grip on long hair and can easily and reliably shear hair from the root. The purpose is to provide.

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 designates a dome-shaped outer cutter base body stretched over an outer cutter holder 2, on the inner surface of which an inner cutter 3 slides.

Further, a recess 4 for napping is formed in the center of the outer cutter base 1.

5 is a large number of small holes formed in the outer blade base 1, and 6 and 7 are arranged approximately radially toward the center of the outer blade base 1 adjacent to the area where the small holes 5 are provided. In the group of the first long hole and the second long hole, each of the long holes 6 and 7 is arranged to be inclined at a predetermined angle with respect to the sliding direction S of the inner cutter 3, as shown in FIG. In addition, a step-like linear inclined portion 8 is cut out in the inner wall on the outer end side of the first elongated hole 6, and the first elongated hole 6 and the second elongated hole 7 are arranged in the circumferential direction. They are arranged alternately.

Note that 10 is a small hole for adjusting the aperture ratio.

In the above structure, when the long hole introduced into the first long hole 6 is located on the outer end side, the long hair is cut while being pressed against the step-like linear inclined part 8 by the cutting edge of the rotating inner cutter 3. The hair is moved along the linear inclined portion 8 while being pressed diagonally, and is cut at the step portion 8a of the linear inclined portion 8 to be shortened.

In this case, since the linearly inclined portion 8 is formed in a step-like manner, even if a plurality of long hairs are introduced into one elongated hole 6 at the same time, the diagonal pushing force is not applied to all the inclined portions 8 at the same time, but in stages. It will work in sequence and be cut diagonally,
Smooth cutting can be performed without unreasonable cutting, and damage to not only the drive system but also the bone between the long holes 6 is prevented.

The long hair that has been cut in this way is cut diagonally, so the cut end is shaped like a scraped cut, and in this way the hair is shortened.

Even if these shortened hairs do not enter the small holes 5, they can be introduced into the adjacent second long holes 7 by being arranged alternately by just slightly moving the electric razor against the skin. It is caught by the serrations 9 of the hole 7 and cut by the inner cutter 3 with an impact.

For this reason, the short hair is cut off even shorter from the root, resulting in a better shaved condition.

As described above, in this invention, the inner cutter 3 is disposed substantially radially on the outer cutter base 1 so as to be inclined with respect to the sliding direction S, and step-like linear inclined portions 8 are cut out in the inner wall on each outer end side. a group of first elongated holes 6, and second elongated holes that are arranged substantially radially and inclined in the same direction as the first elongated holes 6, and each have a notched portion 9 cut out in the inner wall on the outer end side. 7 groups, and the first elongated holes 6 and the second elongated holes 7 are arranged alternately in the circumferential direction,
To provide an outer blade of a rotary electric shaver that can effectively capture long hair and shave off hair from the root using only long holes.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an example of the outer blade of the rotary electric shaver according to this invention, Fig. 2 is a schematic sectional view taken along line III in Fig. 1, and Fig. 3 is an enlarged view of the portion III in Fig. 1. It is. 1...Outer blade base, 3...Inner blade, S...
...Inner blade sliding contact direction, 6...First elongated hole, 7
...Second long hole, 8...Straight inclined part,
9... Notches.

Claims (1)

[Scope of utility model registration request] First elongated holes 6 are arranged substantially radially in the outer cutter base 1 so as to be inclined with respect to the sliding direction S of the inner cutter 3, and have step-like linear inclined portions 8 cut out in the inner wall on each outer end side. and a group of second elongated holes 7 which are arranged substantially radially and inclined in the same direction as the first elongated holes 6, and each of which has a notched portion 9 cut out in the inner wall on the outer end side. An outer blade of a rotary electric shaver in which the first long holes 6 and the second long holes 7 are arranged alternately in the circumferential direction.