JPH049073B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a rotary shaver.

Technical background of the invention and its problems Conventionally, the inner cutter body was rotated about a horizontal axis,
A shaver has been devised that cuts hair by bringing an outer blade curved in only one direction into contact with the outer periphery of the inner blade.
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 cannot be uniformly aligned over the entire length of the inner blade. As a result, a portion of the inner cutter separates from the outer cutter and becomes dull.

Purpose of the Invention The present invention was made in view of the above points, and an object of the present invention is to provide a shear that has good cutting quality by bringing the inner cutter into uniform contact with the outer cutter, and that can be easily manufactured. Summary of an Invention This invention forms a slit on the outer periphery of a drum that faces the inner surface of an outer cutter, and installs an inner cutter in the slit so that it can move forward and backward by biasing it in a centrifugal direction, thereby bending 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. By making it easier to make uniform contact with the blade and improving cutting quality, the inner blade is integrally formed with an elastic leg that exhibits a leaf spring action as a means of biasing the inner blade in the centrifugal direction. , which is designed to reduce the number of parts and simplify the structure.

Embodiment of the Invention An embodiment of the invention will be described with reference to FIGS. 1 to 3. Reference numeral 1 denotes a main body, and the upper part of the main body 1 is provided with a thin motor 2 as a drive unit and a bearing 3. A drum is connected to the motor 2 and has a rotating shaft 4 whose one end is supported by the bearing 3. 5 is provided. Six oblong slits 6 are formed on the outer periphery of the drum 5 in parallel with its axis, and flat inner blades 7 made of steel plates are held in these slits 6 so as to be movable forward and backward. Two elastic legs 8 are integrally formed on both inner edges of these inner cutters 7. As shown in FIG. 3, the bases 9 of these elastic legs 8 are bent at right angles to the base of the inner cutter 7, and the elastic legs 8 extend in an arcuate manner from the central base 9 to both sides. Thus, the elastic leg 8 is connected to the drum 5.
The inner cutter 7 receives a reaction force by contacting a part of the interior thereof, that is, the rotating shaft 4, and is biased in the centrifugal direction. Projections 10 are formed at both ends of the inner cutter 7, and stoppers 11 opposing these projections 10 are formed at both ends of the slit 6 of the drum 5.
Furthermore, an outer cutter 13 curved in one direction is held in an outer cutter case 12 that is detachably fitted to the upper part of the main body 1. Note that a power supply section (not shown) for driving the motor 2 is built inside the main body 1.

In such a configuration, when the motor 2 is driven, the drum 5 rotates. The inner cutter 7 rotating together with the drum 5 is biased in the centrifugal direction, so the outer cutter 1
However, since the outer cutter 13 is curved only in one direction, the edge of the inner cutter 7 may be a straight line, and the inner cutter 7 itself is easy to manufacture. In addition, the amount of protrusion of the inner cutters 7 is determined by the stopper 11, but if there is a margin in the amount of protrusion, even if there is variation, when the outer cutter case 12 is attached, all the inner cutters 7 can be removed over the entire area. It can be brought into contact with the blade 13, so the sharpness is good.

Further, since the inner cutter 7 has the elastic legs 8 exhibiting a leaf spring action, the number of parts can be reduced, the structure can be simplified, and the number of assembly steps can be reduced.

As shown in FIG. 4, the base 9 of the elastic leg 8 may be located in the same plane as the base of the inner cutter 7, and the elastic leg 8 extending from the base 9 may be twisted by 90 degrees. Further, as shown in FIG. 5, elastic legs 14 may be formed from near both ends of the inner cutter 7 toward the center. In this case, the base 15 of the elastic leg 14 is bent relative to the base of the inner cutter 7, but as shown in FIG. 6, the base 15 is positioned in the same plane as the base of the inner cutter 7, The elastic legs may be twisted 90°.

Effects of the Invention Since the present invention is constructed 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 uniform over the entire length of the inner cutter. Therefore, it is easy to manufacture the inner cutters, and it is also easy to uniformly contact the entire blade edge of all the inner cutters with the outer cutter.
The cutting quality can be improved, and the elastic legs formed integrally with the inner cutter can bias the inner cutter in the centrifugal direction, thereby reducing the number of parts and assembly work. It has the following effects.

[Brief explanation of drawings]

The drawings show one embodiment of the invention.
2 is a longitudinal sectional front view, FIG. 3 is a longitudinal sectional side view, FIG. 3 is a perspective view of the inner cutter, and FIGS. 4 to 6 are perspective views showing modified examples of elastic legs formed on the inner cutter. 2... Motor (drive unit), 4... Rotating shaft (part of the inside of the drum), 5... Drum, 7... Inner blade,
8...Elastic leg, 13...Outer blade, 14...Elastic leg.

Claims (1)

[Claims] 1. 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. An inner cutter that contacts the inner surface of the outer cutter is provided in the slit so as to be movable in the radial direction, and the inner cutter is integrally provided with an elastic leg that contacts a part of the inside of the drum and receives a reaction force in the centrifugal direction. Sieba characterized by the formation.