JPS5934382B2 - 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 into an operating position or a 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.

In addition, the sharpening unit is rotatably supported with the pitcher's force direction side as a fulcrum, and a bundle is provided at a position adjacent to the cutting edge of the bundle, which can be directly operated by hand to move the sharpening unit to the operating position or storage. A device that can be rotated into position has also been proposed (see Japanese Unexamined Patent Publication No. 13140/1983).

According to this, the space required in the case to install the sharpening unit is small, and the amount of protrusion of the cutting edge from the case can be set large regardless of the space inside the case. Not only is it dangerous to touch the blade tip when operating it, but there is also the risk of hair particles sticking to your hands and the blade tip rusting.Furthermore, the installation space for the bundle is small and the bundle cannot be made large, so please do not touch the blade with your hands. The drawback was that it was difficult to apply force and difficult to operate.

The present invention supports a sharpening unit so as to be rotatable with the pitcher's force direction side as a fulcrum, and the points of action for rotating the sharpening unit are the fulcrum of the sharpening unit and the cutting edge. located at a position offset from the imaginary line connecting the parts,
An elastic biasing means such as an elastic arm is provided to elastically bias the sharpening unit from the fulcrum side toward the cutting edge side through the point of action, and the point of action is moved up and down with respect to the fulcrum. An operation member that holds the sliding unit in either the storage position or the operating position is slidably provided in the case, and the above-mentioned drawbacks of the conventional method are eliminated by reducing the space within the case for installing the sliding unit. To provide an electric shaver which requires a small amount of heat, can set a large amount of protrusion of the cutting edge from the case, is easy to operate, and has no wobbling of the cutting edge.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 3. 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 includes a fixed blade 5 mounted within the edge edge support 4, and a movable blade 7 having a drive lever 8 integrally formed with the fixed blade 5 with a crimping spring 6. The fulcrum pin 9, which is constructed by press-welding and protrudes from the outer side wall of the sharpening blade support 4, is attached to the case 10.
It is rotatably supported by fitting into a fulcrum hole (not shown) bored in the periphery of the opening 11.

The operating knob 13, which is slidably fitted into the fitting hole 12 of the case 10, is made of a molded product of synthetic resin such as polyacetal, and has a pair of elastic arm parts 14 having claw parts 15 at both upper ends thereof. are integrally formed, and this elastic arm portion 1
The claw portions 15 of 4 are engaged with notches 16 formed in the rear portions of both side walls of the sharpening blade support 4 so as to elastically press the notches 16.

As shown in FIG. 1, this engagement point, that is, the elastic pressing point for rotating the edge cutting unit 3, is located between the fulcrum pin 9, which is the pivot point of the edge cutting unit 3, and the cutting edge. It is set at a position deviated from the connecting virtual line X (in this example, downward).

In the figure, 17 is a drive motor, 18 is an eccentric cam, and 19 is a storage battery.

In the electric shaver configured in this manner, when the operation knob 13 is in the downwardly pressed position as shown in FIG. Located below the rotational fulcrum of the sled unit 3, the rear part of the sled blade support 4 is connected to the elastic arm 1.
The upper surface of the edge cutting unit 3 is pressed against the upper edge of the opening 11 of the case 10 by the elastic force of step 4, and the edge cutting unit 3 is firmly held in the operating position where the cutting edge protrudes from the case 10 without wobbling. are doing.

At this time, the drive lever 8 of the movable blade 7 is connected to the eccentric cam 18.
It is in a position to engage with.

Therefore, by driving the motor 17, the movable blade 7
can be moved back and forth to perform a sharpening action.

Now, when the operating knob 13 is pushed upward, as shown in FIG. 2, the claw portion 15 of the elastic arm portion 14 formed integrally with the operating knob 13 pushes up the rear part of the sharpening blade support 4.
The edge unit 3 rotates clockwise about the fulcrum pin 9 and is housed in the case 10.

In this storage position, the claw part 15 is above the fulcrum pin 9 and presses the rear part of the edge-sliding blade support 4 by the elastic force of the elastic arm 14, so that the edge-sliding unit 3
The cutting edge portion is pressed against the lower edge of the opening 11 of the case 10 and is firmly held without wobbling.

At this time, the engagement between the movable cuff drive lever 8 and the eccentric cam 18 is released.

Further, when the operation knob 13 is pushed down, the edge unit 3 is rotated counterclockwise in the opposite direction to the push-up operation, and is again held at the operating position shown in FIG. 1.

In the above embodiment, in order to elastically press the rear part of the edge cutting unit 3, a notch 16 is provided at the rear part of the edge cutting blade support 4, and the claw part 15 of the elastic arm part 14 is engaged with this. However, a retaining pin is provided protruding from the rear of the edge cutting blade support 4, and an engagement hole formed at the tip of the elastic arm portion 14 is loosely fitted into this pin. The rear part of the sled unit 3 can also be pressed by the elastic force of the elastic arm part 14.

FIG. 4 shows another embodiment, in which two notches 16' and 16'' are provided at the rear of both side walls of the edge cutting blade support 4, sandwiching the fulcrum pin 9 therebetween.

Therefore, after the sharpening unit 3 has completely rotated to the operating position or storage position, the claw portion 15 that was engaged with one notch is moved over the mountain between the notches 16' and 16'' and engaged with the other notch. By aligning them, it is possible to give moderation to the operation, and also to increase the distance in the vertical direction between the rotation fulcrum and each elastic pressing point, thereby strengthening the holding force of the edge sliding unit 3 in both the above-mentioned positions. be able to.

As explained above, according to the present invention, the edge unit is rotatably supported, and the operation member provided in the case is slid to rotate to the operating position or the storage position. Not only does it require less space in the case to provide the cutting edge, but it also allows the cutting edge of the sharpening unit to protrude significantly just by slightly sliding the operating member, and there is no risk of the hand touching the cutting edge during operation. There are no problems and it is very easy to operate.

In addition, as the sliding unit elastically presses the skid unit at the point of action that moves up and down the rotational fulcrum as the operating member slides,
It can be firmly held in the operating position or the storage position without rattling, and it is possible to significantly reduce the harsh abnormal noise caused by the rattling, especially when the valve is operated in a jerky manner.

[Brief explanation of drawings]

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 shows the features of the electric shaver shown in Figs. 1 and 2. FIG. 4 is an exploded perspective view of the electric shaver unit and the operating knob, and FIG. 4 is a vertical sectional side view of the main parts of an electric shaver showing another embodiment of the present invention. 3... Edge cutting unit, 4... Edge edge support, 5... Fixed blade, 7...
Movable blade, 8... Drive lever, 9... Fulcrum pin, 13... Operation knob, 14...
- Elastic arm portion, 15...Claw portion, 16, 16'. 16"...Notch, 18...Eccentric cam,
X...Virtual line.

Claims (1)

[Claims] 1. Support the edge unit so that it can rotate freely with the side facing the pitcher's force as a fulcrum, and set the point of action for rotating the edge unit as an imaginary link between the fulcrum of the edge unit and the cutting edge. An elastic biasing means is provided at a position deviated from the line and elastically biases the cutting unit from the fulcrum side toward the cutting edge side through its point of action, and the point of application of the previous operation is moved up and down with respect to the fulcrum. 1. An electric shaver, characterized in that the case is slidably provided with an operation member that moves to hold the shaver unit in either a storage position or an operating position.