JPS6014890A - Shaver - Google Patents

Abstract

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

Description

[Detailed description of the invention] Technical field of invention The present invention relates to a rotary shaver.

Technical background of the invention and its problems Conventionally, a shaver has been devised that shaves hair by rotating an inner blade body around a horizontal axis and bringing an outer blade curved in only one direction into contact with the outer periphery of the inner blade body. .

And: As a means of bringing the outer edge of the inner cutter into contact with the outer cutter, the entire inner cutter is biased toward the inner surface of the outer cutter, but the radius from the center of the inner cutter to each cutter is The inner cutter cannot be uniformly aligned over the entire length of the inner cutter, and as a result, a portion of the inner cutter separates from the outer cutter, resulting in poor cutting quality.

Purpose of the Invention The present invention was made in view of the above points, and an object of the present invention is to improve the cutting quality by bringing the inner blade into uniform contact with the outer blade, and to provide a shaver that can be easily manufactured. .

Summary of the Invention This invention forms a slit on the outer periphery of a drum that faces the inner surface of the outer cutter, and provides the inner cutter in the slit so as to be biased in a centrifugal direction so that it can move forward and backward, thereby curving the outer cutter only in one direction. This allows the radius from the center of the drum to the cutting edge of the inner cutter to be easily aligned over the entire length of the inner cutter, and therefore,
The structure is such that it is easy to manufacture the inner cutter, it is easy to uniformly contact the entire edge of the inner cutter with the outer cutter 9, and the cutting quality is improved.

Embodiments of the Invention A first embodiment of the invention will be explained based on FIGS. 1 and 2. (1) is a main body, and on the top of this main body (1) there is a thin motor (2) which is a drive part and a bearing (4) that supports one end of a rotating shaft (3) connected to this motor (2). and is provided. A drum (5) is fixedly fitted onto the rotating shaft (3), and six horizontally long slits (6) are formed on the outer periphery of the drum (5) parallel to its axis. 6) holds a flat inner cutter (7) that can move forward and backward. Notches (8) are formed on the inner edges of both sides of these inner blades (force), and the upper end of a spring (9) whose one end abuts on the rotation shaft (3) is fitted into these notches (8). Yoshi inner blade (force is biased in the centrifugal direction).

Next, an outer cutter case (10) is removably fitted to the upper part of the main body (1), and an outer cutter (11) that is curved in one direction and faces the outer periphery of the drum (5) is attached to the outer cutter case (11). υ is held. Also, protrusions tta are formed on both sides of the inner cutter (force), and a stopper [31
is formed on the drum (5). Note that the main body (1) has a built-in power supply unit (not shown) that drives the motor (2).

In such a configuration, when the motor (2) is driven, the rotating shaft (3) and the drum (5) rotate integrally. Each inner blade rotates with the drum (5) (the force is generated by a spring (9)
), it advances in the centrifugal direction and the outer blade (1,
1), but since the outer cutter I is curved in one direction, the edge of the inner cutter (force) is often on a straight line, making it easy to manufacture the inner cutter (force itself). The amount of protrusion is determined by the stopper (13)
However, if the amount of protrusion is allowed, even if there is some variation, when the outer blade case is attached, the spring (9) will cause the outer blade α to extend over the entire area of all the inner blades (7). can be brought into contact.

Therefore, it has good sharpness and is easy to manufacture.

Note that a gently curved spiral slit may be formed on the outer periphery of the drum (5), and an inner cutter may be used that corresponds to this slit.

Next, a second embodiment fjc of the present invention will be explained based on FIG. 3. Components that are the same as those in the embodiment described above are designated by the same reference numerals, and description thereof will be omitted (the same applies hereinafter). In this embodiment, a leaf spring (U) is used to bias the inner blade (7) in the centrifugal direction. and an elastic leg extending outward in an arcuate shape from this clamping part (151).Therefore, the elastic leg aQ is connected to the rotation axis (
The inner cutter (7) can be biased outwardly by contacting the force. Note that the elastic leg (L6) cannot be made too long due to the length of the inner cutter (7), but as shown in Fig. 4, a leaf spring (1
7), it is possible to increase the spring constant.

Next, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, the inner cutter (7) is urged outward by a spring α frame made of steel wire. The spring α rare is an inner blade (a clamping part H that elastically clamps force, an elastic leg (2) extending from this clamping part Buddhist bell, and a rotating shaft (3) located at the tip of these elastic legs). The retaining part circle is an arcuate shape that elastically engages with the inner blade (7).Therefore, the same effect as in the second embodiment can be obtained.In addition, both ends of the holding part u1 are provided at the center of the inner cutter (7). (c) By forming a notch (to) in which a contact edge !221 is formed, the inner cutter (7) and the spring (
4) can be prevented from relative movement in the longitudinal direction. As shown in FIG. 6, it is possible to increase the spring constant by using a U-shaped spring formed with two elastic legs (2G+).

Furthermore, a fourth embodiment of the present invention will be explained based on FIGS. 7 and 8. In this embodiment, the inner edge of the inner blade (7) has a notch c! 7), and the edge of the notch (27) is held on the outer periphery of a coil spring (c) wound around the rotating shaft (3), and the inner cutter (7) is centrifuged by this coil spring (c). It is biased in the direction.

Therefore, the coil spring (c) receives force in the inner circumferential direction from the three inner blades (force) that are always in contact with the outer blade Uυ, but there is still room for it to deviate downward on the opposite side of the outer blade ←υ. In particular, the coil spring I2 barrel has an inner blade (outer blade C1,
) Even if any part of the inner blade (7) is deformed due to pressure from the skin, the inner blade (7) can be moved forward and backward with sensitivity to the force, and the entire inner blade (7) is biased in the centrifugal direction, allowing the outer blade to move over the entire blade edge very effectively. Moreover, since the rotating shaft (3) does not receive any side pressure from the coil spring barrel, no unreasonable force is applied to the bearing (4), and it can be rotated smoothly.

Furthermore, a fifth embodiment of the present invention is shown in FIGS. 9 and 10. In this embodiment, a bending piece 12 is cut and raised on the inner edge of the inner blade (7), and an elastic ring (to) made of rubber or the like fitted to the rotating shaft (3) is attached to the bending piece (2). The inner cutter (7) is urged in the centrifugal direction by contacting the inner cutter (7).

Furthermore, a sixth embodiment of the present invention is shown in FIGS. 11 to 13. In this embodiment, two elastic legs υ are continuously formed on a part of the inner cutter (7) made of a steel plate, and these elastic legs (
31) is brought into contact with the outer periphery of the rotating shaft (3), thereby urging the inner cutter (7) in the centrifugal direction. Elastic legs (31
The base (321) of the inner blade (7) is bent with respect to the base of the inner blade (7) as shown in Fig. 13, and the elastic leg 0υ extends in an arcuate shape from the central base (3 The base bit may twist the inner blade (1 of the elastic legs positioned in the same plane with respect to the force base and extending from this base 02) by 900 degrees as shown in Fig. 14. As shown in FIG. 15, elastic legs (C) may be formed from near both ends of the inner edge of the inner blade toward the center. In this case, the base view of the elastic leg U3J is However, as shown in Fig. 16, the base 541 is located in the same plane as the base of the inner blade (7), In either case, the inner cutter (force is provided in the elastic leg (31) or (up to) the entire body weight, so the number of parts can be reduced.

Effects of the Invention Since the present invention is configured as described above, by curving the outer cutter only in one direction, the radius from the center of the drum to the cutting edge of the inner cutter can be made equal over the entire length of the inner cutter, and therefore, It is easy to manufacture the inner cutters, it is also easy to make uniform contact with the entire outer cutter over the entire blade edge area of all the inner cutters, and it has the effect of improving the cutting f'L taste. It is.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing the first embodiment of the present invention, Fig. 2 iri is a vertical UT side view thereof, and Fig. J'r3 is a longitudinal sectional view showing the second embodiment of the invention. FIG. 4 is a perspective view showing a modified example of the plate spring, and FIG. An exploded perspective view 1 of the main part showing the biasing means, FIG. 6 is a perspective view showing an example of a diamond-shaped spring, FIG. 7 is a longitudinal sectional front view showing a fourth embodiment of the present invention, and FIG. Vertical VfT side view, FIG. 9 is a longitudinal sectional front view showing the fiftieth embodiment of this invention, FIG. 10 is a longitudinal sectional front view thereof, and FIG. 11 is a longitudinal sectional front view showing the sixth embodiment of this invention. , FIG. 12 is a longitudinal sectional side view thereof, FIG. 13 is a perspective view of the inner cutter, and FIGS. 14 to 16 are perspective views showing modifications of the inner cutter. 2. Motor (drive part), 5.. Drum, 6.. Slit, 7.. Inner blade Applicant: Tokyo Electric Co., Ltd. Gomo q Diagram x name JO diagram

Claims (1)

[Claims] A drum connected to a drive unit is rotatably provided along a curved surface of an outer cutter that curves in one direction, and a straight or spiral slit along the longitudinal direction of the drum is formed on the outer periphery of the drum. A shaver characterized in that an inner cutter that contacts the inner surface of the outer cutter is provided in the slit so as to be biased in a centrifugal direction so that the inner cutter can move forward and backward.