JPS5850754B2 - 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 re-unit into the operating position or the storage position.

As a result, the re-unit becomes extremely large, and the space within the case for sliding it becomes too large, resulting in the drawback that the amount of protrusion of the cutting edge from the case cannot be increased very much.

Therefore, recently, a device has been proposed in which 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 (Japanese Patent Application Laid-Open No. (Refer to Publication No. 47-13140) According to this, the space required inside the case to install the reunit 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. can.

However, in this case, the opening for the edge reuniting unit is large, and the edge of the edge unit is exposed even when stored, so the edge of the edge may hit the corner of a desk and be damaged. There was a risk that foreign matter such as dust could enter the case.

In addition, conventionally, the cutting edge of the sharpening unit was provided so that it could be inserted into and taken out from the main body case in a straight line, and a lid body for closing the opening for the cutting edge was placed over the top of the sharpening unit. structure has been proposed.

However, in this case, since the reunit and the lid are arranged so as to overlap, a large space is required, and the main case inevitably becomes thick.

Further, due to the above-described overlapping arrangement, the lid body can only be attached after the reunit is attached, which limits the assembly order and makes the work complicated.

In the present invention, the edge reunit is rotatably supported around its longitudinal side as a fulcrum so that the cutting edge of the edge reunit can be rotated relative to the outer wall of the main body case to protrude and be stored. At the same time, in conjunction with the operating member that rotates the edge unit to the protruding operating position or the retracted position, when retracted,
A lid body that covers at least the cutting edge of the cutting edge reuniting unit is moved to a state where it faces the rotating locus of the cutting edge between the protruding operating position and the storage position of the cutting edge reuniting unit and is not overlapped with the cutting edge unit. When the edge resetting unit is in the retracted position, a part of the lid enters the rotation locus to cover the cutting edge, and when the edge resetting unit is in the protruding operating position, the lid moves into the rotation path. It is configured so that it is placed outside the rotational trajectory, and without the above-mentioned drawbacks of the conventional method, it completely protects the cutting edge with extremely simple operation, and can be made thinner due to the arrangement of parts, making it easier to assemble. The purpose is to provide a good electric razor.

Hereinafter, one 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 its upper left end, and a razor unit 3 slightly above the center on the right side. The edge reunit 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. A fulcrum pin 9, which is constructed as such and is provided protruding from the outer side wall of the edge cutting blade support 4, is fitted into a fulcrum hole (not shown) bored in the periphery of the opening 11 of the case 10. This allows it to be rotatably supported.

The operating knob 13 having a lid 14 that 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 elongated holes 16 at both upper ends thereof. Arm portion 15 is integrally formed.

The elongated hole 16 of the elastic arm portion 15 is fitted into an actuation pin 18 protruding from the outer side wall of the edge cutting blade support 4, and is spaced above the elongated hole 16 at a distance approximately equal to the diameter of the actuation pin 18. A neck portion 17 having a narrow hole width is formed.

As shown in the figure, the special unit 3 and the lid body 14 are arranged next to each other without overlapping each other.

In the figure, 19 is a drive motor, 20 is an eccentric cam, and 21 is a storage battery.

In the electric shaver configured in this manner, when the operating knob 13 is in the downwardly pressed position as shown in FIG. Located below the rotational fulcrum of the sliding unit 3, the rear part of the sliding blade support 4 is pressed by the elastic force of the elastic arm 15 via the operating pin 18, and the upper surface of the sliding unit 3 is moved to the case. 10 against the upper edge of the opening 11 of the case 10.
It is firmly held in the more protruding operating position 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 and a sharpening action can be performed.

Therefore, in this state, as shown in FIG. 1, the lid 14 is placed outside the rotational trajectory of the cutting edge of the cutting unit 3.

Now, when the operation knob 13 is pushed upward, the elastic arm part 15 formed integrally with this moves upward, and the neck part 17 is moved upward.
Since the actuating pin 18, which is locked above the elongated hole 16, also moves upward, the unit 3 rotates clockwise about the fulcrum pin 9 and reaches the storage position in the case 10. The cutting edge of Kiwazo Reunit 3 is Case 10
When it hits the lower edge of the opening 11, the operating pin 18 is no longer locked at the neck 17, so the operating knob 13 moves further upwards by the amount of play below the neck 17 of the elongated hole 16. A lid body 14 integrally formed with the blade enters within the rotation locus of the cutting edge of the sharpening unit 3 and covers the cutting edge to protect it.

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.
0 and is firmly held without wobbling.

At this time, the engagement between the drive lever 8 of the movable blade 7 and the eccentric cam 20 is released.

In addition, 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 15 also moves downward, but since there is some play in the elongated hole 16, the operating pin 18 does not move during this time, and the unit 3 remains in its storage position and is covered by the lid 14. The tip of the blade that was previously exposed is now exposed.

At this time, it is necessary to prevent the offset unit 3 from being rotated counterclockwise due to the frictional engagement between the elongated hole 16 and the operating pin 18.

That is, as shown in FIG.
The rotation fulcrum P of the skidding unit 3 in the storage position engaged with the lower end of the skidding unit 6 and the point pressed by the elastic arm of the actuating pin 18, that is, the suppressing point Q of the skidding unit 3 Let the distance in the vertical direction between the
If the coefficient of static friction between the peripheral edge and the actuating pin 18 is μ, the force Tr that attempts to rotate the edge unit 3 clockwise is Tr=F−a Also, the force Tr that attempts to rotate the edge unit 3 clockwise is as follows. The power TA is TJ!
! =F・μ・b, and it is necessary to make Tr>Tl, 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
6 engages with the operating pin 18, the operating pin 18 also begins to move downward, exposing the cutting edge and causing the rotatable edge unit 3 to protrude outside the case 10. However, when the upper surface of the rear 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 by further pressing down the operating knob 13, the neck 17 is rotated. It reaches the state shown in FIG. 1 in which it crosses over and engages with the upper end of the elongated hole 16.

In the above embodiment, the lid body 14 is operated by the operation knob 1.
As shown in FIG. support,
When the sharpening unit 3 is stored, the blade tip can be covered in conjunction with the upward movement of the operating knob 13.
Also, instead of providing the neck 17 in the long hole 16, an operating pin 18 is always provided between the edge support 4 and the case 10 in the long hole 16.
The same effect as described above can be achieved by providing a spring that biases the knob 6 upward, but simply providing such a spring will cause the operating knob 13 to be pulled upward even when it is in the operating position. If the unit 3 is rotated clockwise, that is, in the direction of the storage position, for example, as shown by the dotted line in FIG. It is necessary to prevent this by providing 22 or the like.

The present invention has the above-mentioned structure, and can completely protect the cutting edge with an extremely simple operation. Also, since the reunit and the lid are arranged in a non-polymerized state, the present invention is thin. In addition to being able to be assembled separately, assembly workability is good.

[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 is an explanation for explaining the rotational force applied to the shaving unit. 4 is an exploded perspective view of the shaving unit and operation knob in the electric shaver shown in FIGS. 1 and 2, and FIG. It is a diagram. 3... Edge cutting unit, 4... Edge edge support, 5... Fixed blade, 7...
Movable blade, 8... Drive lever, 9... Fulcrum pin, 10... Case, 13... Operation knob, 14, 14'... ... Lid body, 15...
...Elastic arm, 16...Long hole, 17...
・・Neck, 18・・・Activation pin, 20・・・・
・Eccentric cam.

Claims (1)

[Claims] 1. Support the edge resetting unit so that it can rotate freely around its longitudinal side as a fulcrum so that the cutting edge of the edge resetting unit protrudes from and is housed in the outer wall of the main body case, and the edge resetting unit When stored, the lid body that covers at least the cutting edge of the edge repair unit is moved between the protrusion operation position and the storage position of the edge repair unit in conjunction with the operating member that rotates the edge repair unit to the protrusion operation position or the storage position. It is provided so as to be movable so as to face the rotation locus of the cutting edge part and not overlap with the cutting edge unit, so that when the edge cutting unit is in the storage position, a part of the lid body enters the rotation locus. 1. An electric shaver characterized in that the lid covers a cutting edge portion and is arranged outside the rotation locus when the sharpening unit is in the protruding operating position.