JPS6015344B2 - 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.

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

As a result, the sharpening unit becomes large, and the space within the case for moving it also becomes large, which has the disadvantage that the amount of protrusion of the cutting edge from the case cannot be increased very much. Therefore, in recent years, a device has been proposed in which the edge unit is rotatably supported using its longitudinal side as a fulcrum, and is selectively rolled and held in the operating position or storage position (UK patent No. 8277 specification, Japanese Patent Application Laid-open No. 47-1314, and Karasu Publication), according to this, the space required in the case for installing the edge unit is small, and the amount of protrusion of the cutting edge from the case is also reduced. It can be set large regardless of the space available. However, in the case of the device described in British Patent No. 827768, a spring force is always applied in the direction in which the edge unit protrudes to the operating position, and the shoulder of the rotation operation knob is locked in the retracted state. When the sliding unit is disengaged by operating the sliding control knob, it protrudes to the operating position, which makes the structure complicated.Moreover, in order to store the sliding unit, it has to be pushed against the spring force. The sliding unit itself has to be pushed back, and the closer you press the position, especially the closer to the center of rotation, the greater the operating force is required, and it is easy to twist, and the blade tip is easy to press with your fingers, which is dangerous. Some people ended up getting hair on their fingertips, or even deforming and damaging the cutting edge. In addition, in the case of the above-mentioned Japanese Patent Application Laid-Open No. 47-1314, the operating handle is arranged in parallel with the rotation axis of the edge unit due to its structure, so that when operating the handle, there is no control. Not only is this dangerous as it is easy to touch the cutting edge with your hands while standing still, the handle cannot be installed in a narrow space and cannot be enlarged, making it difficult to apply finger force and making it difficult to operate. In view of the above-mentioned drawbacks, the present invention supports the Kizori unit so that it can rotate freely between an operating position and a storage position with respect to the case using its longitudinal side as a fulcrum, and also allows sliding operation with respect to the case. By connecting a connecting member that slides in a tangential direction with respect to the rotation direction in conjunction with the operation knob with the edge reunit at a position offset from the turning fulcrum of the edge resetting unit, Eliminates the drawbacks of the conventional method, requires less space in the case to install the edge cutting unit, and allows the protrusion of the cutting edge from the case to be set to a large amount. To provide an electric shaver which can be comfortably moved to an operating position and a stored position and can be moved reliably with a clear sense of moderation.

Below, one embodiment of the present invention will be explained with reference to a blind turtle diagram or a key matrix diagram. An electric razor rudder has a rotary shaving head 2 on the upper left end of the rudder. Next, attach the fixed blade 5 to the sharpening unit brush inside the sharpening blade support mechanism, and also install the movable blade 7, which is rumored to have a drive lever integrated into this fixed blade The fulcrum pin blades protruding from the outer side wall of the mokizori blade support 4 are connected to the fulcrum holes (not shown) drilled in the periphery of the gun turtle at the entrance of the toke 8. It is rotatably supported by mating with the

Again, the lid body 1, which is freely competed with the competing holes of the case 8, is made of a synthetic resin molded product such as boriacetal, and has T long holes 8 at both upper ends. The elastic arm part and the mother part are integrally formed. As shown in FIG. Also on the outer side wall of the blade support body, there is a working pin blade 8' protruding from the fulcrum pin g at a distance R from the pivot pin g, and above it there is a blade approximately the diameter of one working pin box. Narrow-width neck portions 17 are formed at equal intervals. In the figure, g9 is a drive motor, 20 is an eccentric cam, and 21 is a storage battery. When the operating knob 13 is in the downwardly pressed position as shown in the figure, the upper end of the maximum hole 6 of the elastic arm neck 5 is located below the fulcrum pin 9, that is, the rotation fulcrum of the edge sliding unit 3. position, the edge cutting blade support 4 is inserted through the actuating pin 18.
The upper surface of the edge cutting unit 3 is pressed against the upper edge of the entrance part 11 of the case 10 by pressing the rear part of the edge cutting unit 3 by the elastic force of the elastic arm part 15. The layer is firmly controlled without wobbling. Furthermore, at this time, since the drive lever 8 of the movable blade 7 is in a position where it engages with the eccentric cam 20, the movable blade 7 can be reciprocated by driving the motor 19 to perform a sharpening action. can. Now, when the operation knob turtle 3 is pushed upward, the elastic arm 15 formed integrally with it
moves upwards, and the L neck 1 moves upward, causing the operating pin turtle 8 that is fixed above the elongated hole turtle 6 to also move upwards. It reaches the storage level in the wing Q, but when the cutting edge of the edge unit 3 hits the Sekiguchi part 1 of the case 9, the lock in the neck section 7 of the operating pin wing 8 is released. Therefore, the operation knob 1 moves further upward by the amount of play below the neck part 7 of the long hole unit 6. protect this.

In this storage position, the bottom end of the elongated hole 1 is the fulcrum pin 9.
The edge of the edge unit 3 is located at a higher position and presses the rear part of the edge supporter 4 through the operating pin 1 by the elastic force of the elastic arm 1. It is pressed against the lower green and held firmly without wobbling.At this time, the engagement between the drive lever 8 of the L movable blade and the C cam 20 is released.Again, the edge unit is pressed again. In order to make 3 stand out in the working position calendar, the 5th
As shown in figures a to d, the operating knob wing 3 may be pushed down from the position indicated by a.

That is, when doing this, first, the lid body turtle integrally formed with the operation knob corner 3 moves downward, and
The elastic arm 15 also moves downward, but since there is some play in the innermost hole 16, the operating pin 18 does not move during that time, and the edge unit 3 remains in the retracted position, causing the lid to tilt. The covered blade edge is now exposed. At this time, it is necessary to prevent the sharpening unit 3 from being rotated counterclockwise due to the frictional engagement between the outermost hole 16 and the operating 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 of the operating pin 18, that is, the pressing point Q of the edge sliding unit 3. Let a be the vertical distance between them, b be the horizontal distance, be F the elastic force of the elastic arm 15, and let r be the coefficient of static friction between the green around the 16th hole and the actuating pin 18. ,
Force T trying to rotate the edge unit 3 clockwise
r is Tr=F・a Also, the force h that tries to rotate counterclockwise is h=F・a
r・b, and Tr>m must be satisfied, so F
Ga>F・B7>Mu...'・'J, and it is necessary to set the dimensions of a and b so as to satisfy 0}.

Then, when the operating knob turtle 3 is further pushed down, the neck 17 of the most hole turtle 6 and the operating pin amount 8 engage with each other as shown in b, so the operating pin 98 also begins to move downward.
The cutting unit 3 starts rolling counterclockwise using the fulcrum pin 9 as a fulcrum.

At this time, the actuating pin 18G moves counterclockwise while drawing an arc of radius R around the fulcrum pin 9, so the elastic arm 15 moves in an arc and moves downward while being elastically deformed in the lateral direction. Therefore, the restoring force F gradually increases, and when the operating pin 18 and the three-point pin 9 become horizontal, the restoring force F of the t elastic arm portion 15 reaches its maximum as shown in c. From this point, if you push down the operating knob 13 slightly, the operating pin 18
As the elastic arms 15 move, the lateral elastic deformation of the elastic arm portion 15 becomes smaller, and the restoring force acts all at once in the direction of stabilization, causing the upper surface of the edge unit 3 to close to the closing portion 11 of the case 10.
Once the operating position is reached, where it rests against the upper edge, it is prevented from moving and a subsequent depression of the operating knob 13 causes it to pass over the neck 17 and engage the upper end of the elongated hole 16, as shown in FIG. state. Therefore, the vertical movement of the operation knob 13 accompanying the rutting operation of the rutting unit 3 causes the elastic arm portion 15 to resist the restoring force F, and the point at which the restoring force F is maximum (Fig. 5C (see), the operating knob will move at an accelerated rate due to the restoring force F' of the elastic arm, resulting in a pleasant clicking sensation, and the edge unit 3 will be moved to the operating position and the storage position. It can be moved reliably and with a sense of moderation. As explained above, according to the present invention, the edge unit is rotatably supported with respect to the case with its longitudinal side as a fulcrum, and is slidable with respect to the case. The connecting part, which slides in the tangential direction to the above-mentioned turning direction in conjunction with the operating knob, is connected to the edge unit. Electric razor 0 that requires less space inside the case, allows the protrusion of the cutting edge from the case to be large, and has a simple structure that allows the razor unit to be moved reliably to the operating position and storage position with a sense of moderation. can be provided.

[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 for explaining the rotational force particularly applied to the reunit. An explanatory diagram of
FIG. 4 is an exploded perspective view of the sharpening unit and operation knob in the electric shaver shown in FIGS. 1 and 2, and FIG. 5 is an explanatory diagram for explaining the movement relationship between the elastic arm and the sharpening unit. , FIG. 6 is a diagram illustrating the relationship between the elastic arm portion and the position of the curvature unit. 3... Edge unit, 10... Case, 13... Operation knob, 15... Connection member (elastic arm part). Dancing Figure 1 Figure 2 Figure 3 Figure 4 Figure 6

Claims (1)

[Claims] 1 Supports the edge unit 3 so as to be rotatable between the operating position and the storage position relative to the case 10 with its longitudinal side as a fulcrum, and interlocks with the operation knob 13 that slides relative to the case 10. Then, the connecting member 15, which slides in a tangential direction with respect to the rotation direction, is moved to the edge sliding unit 3 at a position offset from the rotation fulcrum of the edge sliding unit.
An electric razor characterized by being connected to.