JPS6058990B2 - electric razor - Google Patents

Description

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

Conventionally, this type of electric shaver incorporates a shaving unit with the cutting edge always protruding from the main body case, and the shaving unit is driven in conjunction with the ON/OFF operation of the power switch. If the razor is dropped during operation or storage, or if another object collides with the edge of the razor, the edge of the razor may become deformed or damaged, and if the user continues to use the razor without knowing it, he or she may be injured. I was afraid.

Therefore, in recent years, the edge cutting unit has been supported in a rotatable manner using its longitudinal side as a fulcrum relative to the main body case, and only when using the edge cutting unit, the edge cutting unit can be rotated to the operating position and the cutting edge can be rotated. It has been proposed that the edge unit protrudes from the main body case, and the edge unit can be rotated to a storage position along the outer wall of the main body case when the edge mechanism is not in use.

(Refer to Japanese Unexamined Patent Publication No. 47-1314) However, even in this case, the cutting edge of the sharpening unit in the storage position is still exposed to the outside, so the cutting edge may be deformed due to falling or collision with other objects. However, the damage could not be resolved.

In view of the above-mentioned drawbacks, the present invention provides an electric shaver in which a sharpening unit is rotatably supported in a main body case, together with a cutting edge portion when the sharpening unit is stored and an operating member for rotating the sharpening unit. The lid that moves up and down covers and protects the blade from the outside, and the lid can release the covering state of the blade edge without interfering with the protruding and retracting operations of the sharpening unit. The purpose is to provide a structure that can be moved from position to position.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 4. In an electric shaver 1, a main body case 1
A rotary shaving head 2 is mounted on the upper left end 10a of the main body case 10, and the right side surface 10b of the main body case 10 is formed into an arc shape with a chord connecting the upper end Y and the lower end Y'' of the surface. A sharpening unit 3 is provided above, and the sharpening unit 3 has a fixed blade 5 mounted in a sharpening blade support 4, and a drive lever 8 is integrally attached to this fixed blade with a crimping spring 6. The movable blade 7 formed in the case 10 is connected to the fulcrum pin 9, which is formed by press-fitting the movable blade 7 formed on the edge of the case 10, and which is protruded from the outer side wall of the edge-sliding blade support 4. (not shown) to be rotatably supported.Furthermore, a fitting hole 12 formed directly below the edge unit 3 of the case 10 is provided with a fitting hole 12 that is slidable in the vertical direction. This operating knob 13 is made of a molded product of synthetic resin such as polyacetal, and has elastic arms 15 extending from both upper ends of the operating knob 13 to the above-mentioned cutting blade support 4. By connecting with the actuation pin 18 that protrudes rearward from the fulcrum pin 9 on the outer side wall of the holder, the edge unit 3 is moved to the retracted position when the operating knob 13 is moved upward, and is projected when the operating knob 13 is moved downward. The sliding unit 3 is moved in conjunction with the vertical movement of the operating knob 13 so that the
I'm trying to rotate it. Further, on the front side of the operating knob 13, a lid body 14 that moves up and down together with the operating knob is formed to extend upwardly, and when the operating knob 13 is in the uppermost moving position, the edge unit 3 in the storage position is opened. At least the cutting edge part is covered from above with a cover body 14 to protect it from external impact, and the operating knob 1
3, the lid body 14 also moves downward to release the covered state.

Here, in the above configuration, it is necessary that the lid body 1J4, which moves up and down as the operation knob 13 slides up and down, does not interfere with the rotation of the edge unit 3 that also occurs when the operation knob is slid. be.

That is, when the cutting unit 3 is in the storage position and the cutting edge is covered with the lid 14, when sliding the operation knob 13 to project and rotate the cutting unit 3, , at least before the turning and protruding operation of the edge unit 3 begins, the covering state by the cover body 14 is released, and conversely, during the storage operation, the cover body 14 is removed after the rotation and retracting operation of the edge unit 3 is completed. must cover the cutting edge so as not to impede the rotational operation of the cutting unit 3.

To this end, the connecting portion of the elastic arm portion 15 with the actuation pin 18 is formed with a long hole 16 that is long in the vertical direction so that the actuation pin 18 can slide along the inner circumference thereof.
A neck portion 17 with a narrow hole width is formed at an upper portion thereof at an interval approximately equal to the diameter of the actuating pin 18. This long hole 16
The specific formation position of the neck portion 17 in the inner part is the operating pin 18 in the elongated hole 16 at the uppermost moving position of the operating knob 13.
It is set to be located upward from the position at least by a stroke at which the covering state of the cutting edge portion of the sharpening unit 3 by the lid body 14 is released downward. Also, the neck 17
In addition, when the actuating pin 18 is operated at the lower part to rotate the shifting unit 3, and a force exceeding a predetermined value in the vertical direction is applied to the actuating pin 18, the actuating pin 18 is in the up-down position. I am learning to allow myself to overcome this.

In the electric shaver configured in this manner, when the operating knob 13 is in the downwardly pressed position as shown in FIG. At a position below the rotational fulcrum of the cutting unit 3, the rear part of the cutting blade support 4 is pressed by the elastic force of the elastic arm 15 via the operating pin 18, and the top surface of the cutting unit 3 is pressed. Press the cutting unit 3 against the upper edge of the opening 11 of the case 10 so that its cutting edge is in the case 1.
It is held firmly in the operating position protruding from 0 without wobbling.

At this time, the drive lever 8 of the movable blade 7 is connected to the eccentric cam 20.
By driving the motor 19, the movable blade 7 can be reciprocated to perform a cutting action. Now, when the operating knob 13 is pushed upward, the elastic arm 15 formed integrally with the operating knob 13 moves upward.
Since the actuating pin 18 that is locked above the elongated hole 16 by the neck 17 also moves upward, the edge unit 3 rotates clockwise about the fulcrum pin 9 and moves to the storage position in the case 10. However, when the cutting edge of the sharpening unit 3 hits the lower edge of the opening 11 of the case 10, the operating pin 18 is unlatched at the neck 17, so the operating knob 13 is moved to the neck of the elongated hole 16. The lid body 14, which is integrally formed with the lid body 14, covers and protects the cutting edge portion of the sharpening unit 3.

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 15 via the operating pin 18, the edge part of the edge cutting unit 3 is located at a higher position than the case 1.
It is pressed against the lower edge of the opening 11 of 0 and is held firmly without wobbling. At this time, the engagement between the drive lever 8 of the movable blade 7 and the eccentric cam 20 is released. Moreover, in order to project the edge unit 3 to the operating position again, the operating knob 13 may be pushed down.

That is, when doing this, first, the lid body 14 formed integrally with the operation knob 13 moves downward, and
The elastic arm portion 15 also moves downward, but since there is some play in the elongated hole 16 until the operating pin 18 hits the neck portion 17,
Only during this time, the operating pin 18 does not move, the cutting unit 3 remains in the stored position, and the cutting edge portion covered by the lid body 14 is exposed. In addition, at this time, long hole 1
It is necessary to prevent the tensioning unit 3 from being rotated counterclockwise due to the frictional engagement between the tensioning unit 6 and the actuation pin 18.

That is, as shown in FIG.
The rotation fulcrum P of the edge sliding unit 3 in the storage position engaged with the lower end of the edge sliding unit 6 and the point pressed by the elastic arm portion of the operating pin 18, that is, the pressing point of the edge sliding unit 3 Let the vertical distance between F1 and Q be a1, and the horizontal distance be b, furthermore, the elastic force F1 of the elastic arm portion 15, the static friction coefficient between the periphery of the elongated hole 16 and the actuating pin 18 be μ.
Tr trying to rotate the edge unit 3 clockwise
In addition, the force 1 that tends to rotate counterclockwise is as follows, and it is necessary to satisfy Tr>η, so 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
Since the neck 17 of 6 and the actuating pin 18 engage with each other, the neck 1
7, the actuating pin 18 also begins to move downward, exposing the cutting edge and rotating the edge unit 3, which is now rotatable, so as to protrude outside the case 10. When the top surface 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 the operation knob 1
The subsequent depression of 3 results in the condition shown in FIG.

As explained above, the present invention allows the lid body 14 integrally extended from the operating knob 13 to be opened in conjunction with the rotational storage and rotational protrusion operations of the edge unit 3 by vertically sliding the operating knob 13. At least the cutting edge of the cutting unit 3 is covered, and at the same time, the cutting edge covering state is released, and when the cutting unit 3 is operated to extend, the covering by the lid body is removed before the turning movement of the cutting unit 3 starts. The operation knob 13 is provided with an idle movement stroke so that the lid body 14 can move toward the cutting edge after the rotational storage operation of the sharpening unit 3 is completed during the storage operation. By simply sliding the normal edge operation knob 13, the edge unit 3 can be securely placed in the storage position with the lid 14 when not in use, without interfering with the rotational movement of the edge unit 3. To provide an electric shaver with excellent operability, which covers and protects the cutting edge of No. 3 and releases the covered state when in use.

[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 shaving unit. 4 are exploded perspective views of the shaving unit and the operating knob in the electric shaver shown in FIGS. 1 and 2. FIG. 3... Kiwazori unit, 10... Main body case, 1
3... Operation knob, 14... Lid, 15... Elastic arm, 16... Elongated hole, 17... Neck, 18... Operating pin.

Claims (1)

[Claims] 1. The edge cutting unit 3 is supported rotatably around its longitudinal side as a fulcrum so that the cutting edge of the edge cutting unit 3 protrudes from and is housed in the outer wall of the main body case 10. An operating knob 13 for rotating the razor is arranged so as to be slidable in the vertical direction directly below the trimming unit 3 of the razor case 10, and an elastic arm 15 integrally extended upward from the operating knob 13 is inserted into the razor case 10. It is connected to an operating pin 18 that protrudes at a position away from the rotational fulcrum of the sliding unit 3, and is operated so that the sliding unit 3 is in the retracted position when the operating knob 13 is moved upward, and is in the protruding position when it is moved downward. Knob 13
The electric shaver is configured to rotate the trimming unit 3 in conjunction with the vertical movement of the operating knob 13.
There is a lid body 14 on the front side that moves up and down together with the operation knob 13.
When the operation knob 13 is in the uppermost moving position, at least the cutting edge of the edge cutting unit 3 in the storage position is covered with the cover body 14, and the elastic arm piece 1 is formed to extend upward.
The connection part with the operating pin 18 of No. 5 is formed in the middle of the elongated hole 16 and the elongated hole 16 which are long in the vertical direction, and the operating pin 18 can be operated above and below the elongated hole 16 to release the operating pin 18.
and a neck portion 17 with a narrow hole width that the operating pin 18 can ride over vertically, and furthermore, the neck portion 17 is formed at a position where the operating knob 13 is located at the uppermost position of the operating knob 13 in the elongated hole 16. By setting the pin 18 upward from the position of the pin 18 by at least the stroke at which the lid body 14 releases the covering state of the cutting edge of the edge cutting unit 3 downward, when the edge cutting unit 3 is operated to protrude, the lower part of the neck 17 The covering state of the lid 14 is released before the turning and protruding operation of the edge cutting unit 3 begins, and during the storage operation, the lid 14 is removed from the cutting edge after the storage operation of the edge cutting unit 3 by the upper part of the neck 17 is completed. An electric shaver characterized by being adapted to correspond to different parts of the body.