JPH0255078A - Hair cutting device - Google Patents

Abstract

PURPOSE:To reduce the cutting resistance and shorten the time necessary for cutting hair by setting an inner cutter positioned on the inner peripheral side of an inner cutter basic board which is revolution-driven and an inner cutter positioned on the outer peripheral side so as to be shifted in the peripheral direction of the inner cutter basic board and superposing the locusci of revolu tion of the both inner cutters. CONSTITUTION:Three inner cutters 2b are installed on the outer peripheral side of an inner cutter basic board 3, and three inner cutters 2a are installed on the inner peripheral side, and urged to the outer cutting edge 1 side by a pushing-up spring 22. Since the inner cutting edge 2a on the inner peripheral side and the inner cutting edge 2b on the outer peripheral side are shifted by each nearly half pitch in the peripheral direction of the inner cutter basic board 3, the simultaneous cutting of hair on the both inner cutters 2a and 2b is hardly carried out and the cutting resistance is reduced. Further, the outside of the inner cutter 2a and the inside of the inner cutter 2b are set so that the locusci of revolution are superposed by beta each other. Therefore, a region which is not used for cutting is reduced to zero, and the chance of cutting hair can be increased.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a hair cutting device used for cutting various types of hair, such as an electric razor or a pill remover, and particularly to a rotary hair cutting device.

[Conventional technology]

A rotary hair cutting device consists of an outer blade in which numerous blade holes are formed, and an inner blade that slides against the inner surface of the outer blade when driven to rotate. , a plurality of blades are attached radially to an inner cutter base that is rotationally driven. There is also provided an inner cutter in which inner cutters are disposed on the inner circumferential side and the outer circumferential side of the inner cutter base, respectively. - Examples are shown in FIGS. 6 and 7. In the figure, reference numeral 1 denotes an outer cutter, and the outer cutter 1, which is formed in a dome shape, has its peripheral edge supported by an outer cutter frame 10. Three inner cutters 2a are attached to the inner circumferential side of the inner cutter base 3, which is connected to a motor and rotationally driven, and three inner cutters 2b are similarly attached to the outer circumferential side. Each inner cutter 2a, 2b here has a push-up spring 22, respectively.
is urged upward, that is, toward the outer cutter 1 side.

[Problem to be solved by the invention]

In a device equipped with such inner cutters 2a and 2b, as is clear from FIG. 7, conventionally the inner cutter 2a on the inner circumference side and the inner cutter 2b on the outer circumference side were at the same position in the circumferential direction. Therefore, there are many opportunities for both inner blades 2a and 2b to cut hair at the same time, and there is a problem that the cutting resistance is large and the cutting quality is poor. Between the inner blade 2a and the inner blade 2b on the outer circumferential side, there exists a PJ interval α, that is, a region where hair is not cut, and this reduces the chance of hair cutting. The present invention has been made in view of these points, and its purpose is to provide a hair cutting device that has good sharpness and has many opportunities to cut hair.

[Means to solve the problem]

Accordingly, the present invention provides a hair cutting device equipped with an inner cutter that is attached to a rotatably driven inner cutter base and comes into sliding contact with the inner surface of the outer cutter, in which the inner cutter is located on the inner peripheral side of the inner cutter base. things and,
There are two types, one located on the outer circumferential side of the inner cutter base, and one located at a position shifted in the circumferential direction of the inner cutter base. They are characterized by being arranged where their rotational trajectories overlap. [Function] According to the present invention, since the inner cutter on the inner circumference side and the inner cutter on the outer circumference side are offset in the circumferential direction of the inner cutter base, both inner cutters cannot cut hair at the same time. Since the number of inner blades is reduced and the rotation loci of both inner blades overlap, there is no area that cannot be used for cutting, and there are more opportunities to cut hair. [Example] The present invention will be described in detail below based on the illustrated embodiment. It shows what is used for. The inner cutter base 3 is a disc-shaped member having a cylindrical portion 30 in the center into which a joint for connection with a motor is inserted, and has notches at a plurality of locations. In the illustrated example, a total of six inner cutters 2b and 2a, three on the outer circumferential side and three on the inner circumferential side, are attached to this inner cutter base 3, but these inner cutters 2a and 2b are , together with a push-up spring 22 that urges these toward the outer cutter 1 (IllI), are integrally formed by punching and bending from two metal plates, and the inner cutter 2a on the inner circumferential side and the outer circumferential side The inner cutters 2b are shifted by approximately half a pitch in the circumferential direction of the inner cutter base 3, and the outer side of the inner cutter 2a on the inner circumferential side and the inner side of the inner cutter 2b on the outer circumferential side are , β in the figure
Their rotation trajectories overlap by the amount indicated by . In the figure, reference numeral 23 denotes a fixing piece fixed to the lower surface side of the inner cutter base 3 by heat sealing, and 24 denotes a connecting part connecting each fixing piece 23. The ring-shaped portion of the connecting portion 24 is fitted into the cylindrical portion 30 of the inner cutter base 3. However, in this hair cutting device, since the inner cutter 2a on the inner circumference side and the inner cutter 2b on the outer circumference side are provided at positions shifted in the circumferential direction of the inner cutter base 3, it is possible to Blade 2a, 2
b rarely cuts hair at the same time, which reduces the cutting resistance, and there is no gap between the two types of inner blades 2a and 2b in the radial direction of the inner blade base 3. Moreover, since the hairs overlap, the chance of hair cutting in this overlapped area is doubled. Note that the blade width of the inner cutter 2a on the inner circumference side is the width of the inner cutter 2b on the outer circumference side.
The blade width b2 is larger than that of the push-up spring 22.
The force pushing up each inner cutter 2a, 2b is constant. This is because the centrifugal force acting on the inner cutter 2b on the outer circumference side is larger than the centrifugal force acting on the inner cutter 2a on the inner circumference side. Therefore, originally, the inner cutter 2b on the outer circumference side is This was done in consideration of the fact that the amount of deviation to the side increases and a gap is created between the outer cutter 1 and the outer cutter 1. Based on the difference between the blade widths b+ and b2 mentioned above,
The force per unit length when the inner cutter 2b on the outer circumference side is pressed against the outer cutter 1 is increased so that the frictional force countering the above-mentioned deviation is larger on the inner cutter 2b on the outer circumference side. As a result, the inner cutter 2b on the outer circumferential side only shifts to the same degree as the inner cutter 2a on the inner circumferential side, and there is no gap between the inner cutter 2b and the outer cutter 1, resulting in poor cutting quality. There is no such thing. Further, as shown in FIG. 4, the cutting edge of each inner cutter 2a, 2b has a thickness e that is thinner than the thickness d of the other portions. For this reason, the contact area between the inner cutters 2a, 2b and the outer cutter 1 is reduced, and the sliding resistance acting between the inner cutters 2a, 2b and the outer cutter 1 is reduced. The load on the rotation of the inner blades 2a, 2b is reduced, and the lifespan of the battery is extended in the case of a device powered by a battery. Furthermore, as shown in FIG. 6, among the cutter holes 11 provided in the outer cutter 1, the diameter of the cutter hole 11 located at a position corresponding to the inner cutter 2b on the outer circumference side is the same as that of the inner cutter 2a on the inner circumference side. It is made larger than its counterpart to enable introduction cutting of large hairballs.

【Effect of the invention】

As described above, in the present invention, since the inner cutter on the inner circumference side and the inner cutter on the outer circumference side are offset in the circumferential direction of the inner cutter base, both inner cutters can cut hair at the same time. The cutting resistance is small, and good sharpness can be obtained.In addition, since the rotation loci of both inner blades overlap, there is no area that cannot be used for cutting. , there are many chances to cut the hair, and the time required for cutting the hair is shortened.

[Brief explanation of the drawing]

Figure 1 is a sectional view of one embodiment of the present invention, Figure 2 is a bottom view of the same as above, Figures 3 (a) and (b) are front views of the inner cutter on the inner circumference side and the inner cutter on the outer circumference side, and Figure 4 The figure is an enlarged sectional view of the inner cutter shown above, Fig. 5 is a plan view of the outer cutter shown above, Fig. 6 is a broken is view of the conventional example, and Fig. 7 is a plan view of the inner cutter and inner cutter base shown above. In the figure, 1 is an outer cutter, 2a is an inner cutter on the inner circumference side, 2b is an inner cutter on the outer circumference side, and 3 is an inner cutter base. Agent Patent Attorney Ishi 1) Long 7th 1 Figure 1 ・Outer blade 2a - Inner peripheral side inner blade Figure 6 Figure 2 Figure 7 (a) Figure 3 (b)

Claims (1)

[Claims] (1) A hair cutting device equipped with an inner cutter attached to a rotatably driven inner cutter base and slidingly contacting the inner surface of the outer cutter, the inner cutter being located on the inner peripheral side of the inner cutter base; There are two types, one located on the outer circumferential side of the inner cutter base, and one located at a position shifted in the circumferential direction of the inner cutter base. A hair cutting device characterized in that the hair cutting device and the hair cutting device are arranged at locations where their rotational trajectories overlap.