JPS6015345B2 - electric razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric shaver, and more particularly to an electric shaver equipped with a shaving unit.

In conventional electric shavers of this type, it is common to operate a lever or the like to selectively slide the shaving unit to the operating position or to the storage position.

As a result, the sharpening unit becomes large in size, and the space within the case for sliding the unit also becomes large, resulting in the drawback that the amount of protrusion of the cutting edge from the case cannot be increased very much. Therefore, recently it has been proposed that the sharpening unit is rotatably supported using its longitudinal side as a fulcrum, and is selectively rotated and held in the operating position or the storage position. According to this, the space required within the case to install the edge unit is small, and the amount of protrusion of the cutting edge from the case is large regardless of the space inside the case. Can be set.

However, in this case, since the center of the scale is set as the fulcrum of the operating knob, a large operating force is required when operating the scale, and therefore it is difficult to make the scale operate smoothly. , it is necessary to set the length of the control knob from the center to be long, and because of this, the control knob protrudes greatly from the case surface and is easily damaged if accidentally dropped, which is not a desirable design. There wasn't. Moreover, due to its structure, the operating knob is placed on the same line as the axis of rotation of the sharpening unit, and the location for installing the operating knob is narrow and cannot be enlarged, making it difficult to apply finger force and making it difficult to operate. It had the drawback of being spicy. The present invention provides an electric shaver in which such a sharpening unit is supported on its longitudinal side so that it can be rotated freely, and is selectively rotated and held in an operating position or a stored position. By connecting the elastic connecting part that slides in conjunction with the above-mentioned edge unit to the above-mentioned edge unit at an appropriate distance from its rotational fulcrum, the edge-of-line unit can rotate smoothly with only 4. To provide a fly-killing razor that can perform a laying operation, and by setting its connecting part on the rear side of the fulcrum, it prevents cutting hair from adhering to the connecting part and clogging it, and does not cause defective laying. The purpose is to provide

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 4. An electric shaver 1 includes a rotary shaving head 2 at the upper left end thereof and a shaving unit 3 slightly above the center on the right side. The edge cutting unit 3 has a fixed blade 5 installed in the edge edge support 4, and a movable blade 7, on which a drive lever 8 is integrally formed, is pressed onto the fixed blade by a compression spring 6. The support pin 9 protruding from the outer side wall of the edged blade support is connected to the case wing 8.
The sardine is freely supported by competing with a fulcrum hole (not shown) drilled around the opening 11 of the sardine.

In addition, the operation knob 3, which has a lid 1 which is fitted in the fitting hole 12 of the case gQ in a tangential direction with respect to the direction of rotation of the above-mentioned edge unit 3, is made of synthetic resin such as polyacetal. It is made of a molded product, and is integrally formed with an elastic arm part IS having the most hole part 5 at both upper ends. The operating pin bases are arranged to protrude a distance backward from the fulcrum pin fin at the rear end of the outer side wall, and above the operating pin bases are provided a neck with a narrow hole width at an interval approximately equal to the diameter of the operating pin turtle. In the figure, 19 is a driving motor, 28 is a D cam, and 21 is a storage battery. When the operating knob 13 is in the depressed position, the upper end of the elongated hole 16 of the elastic arm turtle 5 is located below the fulcrum pin 8, that is, the rotational fulcrum of the edge reunit 3, and the operating pin The rear part of the edge-sliding blade support 4 is pressed by the elastic force of the elastic arm 15 through the edge-sliding member 18, and the upper surface of the edge-sliding unit 3 is pressed against the upper edge of the opening 11 of the case plate 0. In the operating position where the cutting edge protrudes from the case 10, it is firmly held without wobbling.

In addition, at this time, the drive lever 8 of the movable blade 7 is connected to the eccentric cam 2Q.
By driving the motor 19, the movable blade 7 can be reciprocated and a sharpening action can be performed. Now, when the operating knob 13 is pushed upward, the elastic arm 15 formed integrally with the operating knob 13 moves upward, and the operating pin 18, which is locked above the elongated hole 16 by the neck 17, also moves upward. The edge cutting unit 3 rotates clockwise about the fulcrum pin 9 and reaches the storage position in the case 10, but the cutting edge of the edge cutting unit 3 hits the lower edge of the opening 11 of the case 10. At this point, the operating pin 18 is no longer locked at the neck 17, so the operating knob 13 moves further upward by the amount of play below the neck 17 of the elongated hole 16, and the lid 14 integrally formed therewith moves upward. The cutting edge of the cutting unit 3 is covered and protected.

In this storage position, the lower end of the elongated hole 16 is connected to the fulcrum pin 9.
Since the rear part of the edge cutting blade support 4 is pressed by the elastic force of the elastic arm part 95 through the operating pin 18, the edge part of the edge cutting unit 3 is placed in the case I.
Q is pressed against the lower edge of the opening 11 and held firmly without wobbling.At this time, the engagement between the movable blade's turbulence lever 8 and the eccentric cam 20 is released. In order to project it to the operating position, the operating knob 13 can be pushed down.

That is, when doing this, first the rhombic body i4 formed integrally with the operation knob turtle 3 moves downward, and the elastic arm 15 also moves downward, but since there is play in the long hole 16, Only during this time, the operating pin turtle 8 does not move, and the cutting unit 3 remains in the stored position, and the cutting edge portion that was covered by the lid body 14 is exposed. It is necessary to prevent the sharpening unit 3 from rotating counterclockwise due to frictional engagement with the pin 18. That is, as shown in FIG. The upper and lower positions between the turning support point P of the edge sliding unit 3 and the point pressed by the elastic arm of the operating pin 18, that is, the pressing point Q of the edge sliding unit 3 in the engaged storage position. Assuming that the distance in the direction is a, the distance in the left and right direction is b, the elastic force of the elastic arm portion 15 is F, and the coefficient of static friction between the green around the 16th hole and the actuating pin 18 is F, then the edge unit The force Tr that attempts to rotate 3 clockwise is Tr = F・a. Also, the force h that attempts to rotate 3 counterclockwise is m = F・F・b, so Tr>m must be satisfied. So F・a
>F・Buddha・b7>Mu...'・' It is necessary to set the dimensions of a and b so as to satisfy '1}.

Then, when the operation knob 13 is further pushed down, the elongated hole 1
6 engages with the operating pin 18, the operating pin 18 also begins to move downward, exposing the cutting edge and allowing the cutting unit 3, which can be freely extended, to protrude out of the case 10. However, when the upper surface of the edge unit 3 reaches the operating position where it comes into contact with the upper edge of the opening 11 of the case 10, the movement is blocked, and when the operating knob 13 is pressed down thereafter, it crosses the neck 17. The upper end of the uppermost hole 16 is engaged with the upper end of the uppermost hole 16, as shown in the figure.

Here, since the elastic arm portion S5 of the operating knob 13 is connected to the rear side of the fulcrum pin 9 of the edge unit 3 at a distance R, the center of rotation is set as the fulcrum of the operating knob. Compared to the conventional switch, the sharpening unit 3 can be rotated with a small operating force, and the operating knob 13 can be placed close to the surface of the case 10 and can be set freely, which prevents breakage of the conventional switch. It is possible to prevent this from happening, and it is possible to create a structure that matches the overall atmosphere in terms of design.

Furthermore, since the operating knob can be made larger, it is easier to apply finger force, and operability can also be improved.

In addition, since the connecting part with the elastic arm part 15 is located on the rear side of the fulcrum pin 9 of the edge unit 3, the connecting part moves in the tangential direction not near the surface of the case 10 but inside the case 10. Therefore, when using the edger, cutting bristles are less likely to adhere to the connecting portion, and defective rotation of the edger unit due to clogging of the bristles can be prevented. As explained above,
According to the present invention, the edge resetting unit is rotatably supported with respect to the case with its longitudinal side as a fulcrum, and the edge resetting unit is attached to the operation knob that is slidably operated with respect to the case. By linking with the knob in a tangential direction to the direction of rotation of the sliding unit using an elastic connecting member, and by setting the connecting position to the rear side of the fulcrum, the drawbacks of the follower are solved and operability is improved. It is possible to provide an electric shaver that is excellent in terms of quality, structure, and appearance and is suitable for any purpose.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of an electric shaver showing an embodiment of the present invention, Fig. 2 is a vertical sectional side view of the same main part, and Fig. 3 is an explanation for explaining the rotational force applied to the reunit. 4 are exploded perspective views of the shaving unit and operation knob in the electric shaver shown in FIGS. 1 and 2. FIG. 3...Kiwazo Reunit, 10...Case, 13...
...Operation knob, 15...Elastic connection member. 'Millet Figure 2 Figure 3 Figure 4 Purple' Figure

Claims (1)

[Claims] 1. The edge sliding unit 3 is rotatably supported with respect to the case 10 with its longitudinal side as a fulcrum, and the edge sliding unit 3 is attached to the operation knob 13 which is slidably operated with respect to the case 10. An electric shaver characterized by being connected to a knob 13 by an elastic connecting member 15 that slides in a tangential direction with respect to the rotating direction of the sharpening unit 3, and the connecting position is set to the rear side of the fulcrum. .