JPS6223584B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electric shaver.

Conventionally, an outer cutter 31 has a slit 3 as shown in FIG.
2, and an inner cutter 3 is provided on the inner surface of the outer cutter 31.
By rotating and sliding 3, the slit 3
In the electric razor configured to shave the beard H introduced from the inner cutter 2 toward the inner cutter 33, since the width of the slit 32 of the outer cutter 31 is constant, the slit 32
The amount of beard H introduced into the inside of the beard and the depth of contact of the inner cutter 33 with the skin S are approximately uniform, and the degree of irritation can be adjusted depending on the preference of shortness of the finished beard and the characteristics of each person's skin S. In order to adjust the degree of shaving depending on the strength, etc., it is necessary for the individual user to operate the electric shaver empirically while adjusting the pressing force against the skin S, which is extremely complicated.

The present invention has been proposed in view of the above points, and its object is to have inner blades arranged radially around the outer periphery of a cylindrical base that is supported at both axial ends and rotated. The fixed outer cutter and the movable outer cutter are arranged side by side in the same arc shape through an inner cutter and a slit that is close to the outside of the inner cutter and perpendicular to the rotation direction, and the width of the slit can be easily controlled. By changing the amount of skin that protrudes from the slit toward the inner blade, the electric shaver allows you to subtly and easily adjust the shortness of the shaved beard and the strength of the irritation to the skin. There is a razor on offer.

The present invention will be explained below with reference to the drawings.

2 to 6 show a first embodiment of the present invention. First, in FIG. 2, 1 is a razor body with a built-in motor (not shown) and a switch 2, and 3 is an external razor body. A blade frame, 4 is a fixed outer cutter attached to the upper part of the outer cutter frame 3, and 5 is an inner cutter 7 whose slit interval between the fixed outer cutter 4 and the fixed outer cutter 4 can be changed by operating an adjustment dial 6.
The movable outer cutter 7a moves along the rotation direction of the fixed outer cutter 4 and the inner cutter blade 7a rotates inside the fixed outer cutter 4 and the movable outer cutter 5, respectively.

To explain the structure of the electric shaver blade in more detail, as shown in FIGS. 3 and 4, a fixed outer cutter 4 is disposed on one side of the upper part of the outer cutter frame 3, and Fixed outer blade 4 located
The movable outer cutter 5 is disposed through the slit 8 so as to butt against the edge of the cutter. Each of these outer blades 4,
5 has a large number of inner blades 7a,
The plurality of inner cutter blades 7a form the inner cutter 7 by being arranged radially around the outer periphery of a cylindrical (or cylindrical) base whose axially opposite ends are supported and rotationally driven. The inner blade 7a disposed on the inner cutter 7 is arranged to approach near a slit 8 formed by the fixed outer cutter 4 and the movable outer cutter. The slit 8 is formed perpendicularly to the direction of rotation of the inner cutter 7. An eccentric cam 10 is integrally attached to the rotation shaft 9 of the adjustment dial 6, and the eccentric cam 10 can rotate as the adjustment dial 6 rotates.
One end of a spring 11 is hooked to the inner surface of the movable outer cutter 5, and the other end of a spring 11 is hooked to the rotating shaft 9, so that the movable outer cutter 5 is always pressed in the direction of the inner cutter 7, and the movable outer cutter 5 is always pressed toward the inner cutter 7. The tip of a guide pin 12 attached near the lower end of the inner surface of the outer cutter 5 is also pressed against the circumferential surface of the eccentric cam 10. Further, the lower end edge of the movable outer cutter 5 is in contact with a guide surface 13 formed inside the outer cutter frame 3. Note that the slope of this guide surface 13 is
It is desirable that the slope is approximately equal to the locus of movement of the side edge of the slit 8 of the movable outer cutter 5.

As is well known, shaving is performed by the cooperation of the rotating inner cutter 7 and outer cutter, but in the present invention, the circumferential surface of the eccentric cam 10 is adjusted by rotating the adjustment dial 6. In order to press the tip of the guide pin 12, the movable outer cutter 5 is moved along the guide surface 13 and along the rotational direction of the inner cutter 7 by the spring 1.
1, the edge of the movable outer cutter 5 on the slit 8 side moves along the periphery of the inner cutter 7 against the fixed outer cutter 4.
move away from. Therefore, as shown in FIGS. 5 and 6, the width of the slit 8 can be changed as shown in a and a' depending on the rotation angle of the adjustment dial 6. In other words, the width of the slit 8 can be changed from the slit 8 toward the inner cutter 7. By adjusting the amount of the skin S that protrudes, it is possible to finely adjust the shortness of the shaved beard H, the strength of the irritation to the skin S, etc. It is preferable that the slit 8, which has been gradually opened, closes when the adjustment dial 6 is rotated by 180 degrees or more.

Next, FIGS. 7 to 9 show a second embodiment, in which the width of the slit is changed by moving the movable outer cutter in a direction perpendicular to the rotational direction of the inner cutter 7. It is composed of That is, as shown in FIGS. 7 and 8, the fixed outer cutter 14 and the movable outer cutter 15 are formed with corrugated edges facing each other when viewed from above, and the movable outer cutter 15 is formed with the outer cutter frame 16. It is constantly pressed downward in FIG. 8 by a spring 17 whose one end is locked inside. Further, a guide pin 18 is attached to the lower end of the movable outer cutter 15, and this guide pin 18 receives the pressing force of the spring 17, and the adjustment dial 1
The guide cam 20 is integrally connected to the guide cam 9 and is pressed against the edge of the guide cam 20 having different thicknesses along the circumferential direction.

In this operation, the guide cam 20 rotates as the adjustment dial 19 rotates, and as the thickness of the guide cam 20 changes, the guide pin 18, that is, the movable outer cutter 15 moves against the spring 1.
Since the slit 21 moves in the length direction, that is, in the direction perpendicular to the rotational direction of the inner cutter 7, due to the restoring force of the inner cutter 7, the shape of the slit 21 between the outer cutters 14 and 15 changes as shown in FIG. , whose width is b, b′,
b'', and achieves the same functions and effects as the previous embodiment.

As described above, according to the present invention, there is an inner cutter in which inner cutter blades are arranged radially around the outer periphery of a cylindrical base whose axially opposite ends are supported and rotationally driven; In addition, the movable outer cutter and the movable outer cutter are arranged side by side in the same arc shape through a slit orthogonal to the rotation direction, and the width of the slit can be changed, so it can be easily removed from the slit. The amount of skin protruding toward the inner blade, that is, the amount of beard introduced into the slit, and the depth of contact of the inner blade to the skin can be freely adjusted, allowing for a close shave, etc., and a short beard after shaving. It has the effect of allowing subtle adjustments to be made over a wide range according to the user's preferences and the strength of the irritation depending on the strength and weakness of the user's skin.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main parts of a conventional example, Figs. 2 to 6 show a first embodiment of the present invention, Fig. 2 is a perspective view, and Figs. 3 and 4 are FIGS. 5 and 6 are partially cutaway side views, respectively, and FIGS.
9 to 9 show a second embodiment of the present invention,
7 is a perspective view, FIG. 8 is a partially cutaway plan view, and FIGS. 9A, 9B, and 9C are enlarged plan views of essential parts for explaining the operation, respectively. 4, 14... Fixed outer blade, 5, 15... Movable outer blade, 6, 19... Adjustment dial, 7... Inner blade, 7
a... Inner blade, 8, 21... Slit, 1
0... Eccentric cam, 11, 17... Spring, 1
2, 18... Guide pin, 13... Guide surface, 2
0...guidance cam, S...skin, H...beard.

Claims (1)

[Scope of Claims] 1. An inner cutter having inner cutter blades arranged radially around the outer periphery of a cylindrical base whose axially opposite ends are supported and rotated; An electric shaver characterized in that a fixed outer cutter and a movable outer cutter are arranged side by side in the same arc shape through a slit orthogonal to the rotation direction, and the width of the slit is changeable. 2. The electric shaver according to claim 1, wherein the movable outer cutter is moved along the rotational direction of the inner cutter. 3. Each end edge of the fixed outer cutter and the movable outer cutter facing the slit is formed into a planar substantially corrugated shape, and the movable outer cutter is movable along the length direction of the slit. Electric shaver as described in section.