JPH0123410Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electric shaver, and more particularly to an electric shaver in which an inner blade drive switch is turned on and off by a seesaw motion of a seesaw plate.

[Conventional technology]

Conventionally, an electric shaver incorporates a seesaw plate, and this seesaw plate uses the center as a fulcrum and alternately moves up and down at both ends (seesaw movement).
There is one that turns the inner blade drive switch on and off (documents unknown).

[Problem that the invention attempts to solve]

The above-mentioned seesaw plate has a force point for turning on at one end and a force point for turning off at the other end, spaced equally apart from the fulcrum. When the force point for operation is pressed, the seesaw plate is tilted, and at the same time as the inner blade drive switch is turned on, the force point for OFF operation at the other end projects. However, if the OFF operation force point protrudes during use, the OFF operation force point may be inadvertently pushed by the hand gripping the main body case, and the inner blade may stop rotating, causing the beard to get caught and cause injury to the user. A situation had arisen that caused a sense of injury.

Additionally, it is conceivable to incorporate a separate locking means into the seesaw plate to prevent it from sinking even if the force point for the off operation is inadvertently subjected to pressure while the seesaw plate is in the switched-on state during use. This has the disadvantage that the operation is complicated and the structure and assembly are also complicated.

Therefore, this invention focuses on such facts, and even if the force point for off operation of the seesaw board protrudes during use, it is unlikely to be inadvertently pushed, and even if pushed, it will not easily sink. The first objective is to solve the problem of beard biting in this way.

The second objective of this invention is to simplify the means for preventing sinking of the force point for turning off the seesaw plate.
The purpose of

[Means to solve the problem]

In order to achieve the above object, in this invention, the length from the fulcrum part of the seesaw plate to the OFF operation force point part is set shorter than the length between the ON operation force point part and the fulcrum part.

[Effect]

In such cases, due to the principle of leverage, only a small force is required to push the power point for ON operation, but a larger force is required to push the power point for OFF operation, which means that the power point for OFF operation is not prepared properly. Push movements are reduced as much as possible. In addition, it is possible to make the amount of protrusion of the power point for OFF operation from the main body case smaller than the amount of protrusion of the power point for ON operation from the main body case. Less pressure.

〔Example〕

The drawing shows an embodiment of the electric shaver according to the present invention.

(Main body case structure) In Figs. 5 to 8, the main body case 1 is formed into a rectangular cylindrical shape by abutting front and rear plastic cases 1a and 1b and integrally connecting them with screws, etc. A mounting base 3 is fixed to the top of the mounting base 3, and the head case 4 is in an upright position in which it is substantially in a straight line with respect to the main body case 1, and in a tilted position in which the main body case 1 is tilted toward the front side. It is pivotally connected around a shaft 5 so as to be freely swingable.

Specifically, shafts 5, 5 protruding from the left and right ends of the mounting base 3 are rotatably fitted into shaft holes 6, 6 recessed on the left and right inner surfaces of the head case 4, and the mounting base 3 Elastic moderation plates 7, 7 installed upright on the left and right ends of
By selectively engaging the engagers 10, 10 provided on the left and right inner surfaces of the head case 4 with one of the holes 8, 9 provided at the front and rear positions of the head case 4, the head case 4 is placed in an upright position ( 5) and a tilted posture (see FIG. 6).

(Inner blade drive mechanism) In FIGS. 7 and 8, a plastic vibrating body 11 that elastically swings and deforms in the left-right direction is attached to the inside of the head case 4.
1 has a pin 12 erected in a forward-slanted manner at the center of the upper end surface and protrudes upward from the central opening 13 of the head case 4;
An inner cutter 14 is attached to this pin 12 via an inner cutter holder 15. On the other hand, a motor 16 is arranged inside the main body case 1, and the motor shaft 16a is connected to the mounting base 3.
An eccentric cam 19 that protrudes upward from the opening 17 of the vibrating body 17 and has an eccentric pin 18 is fixed to the protruding end thereof, and the eccentric pin 19 is slidably engaged in a groove 20 provided in the front-rear direction on the lower surface of the vibrating body 11. A long groove 22 long in the front-rear direction provided on the lower surface of the slider 21
engage with. In such a case, the eccentric cam 19 is rotated by the drive of the motor 16, and the slider 21 that engages with the eccentric pin 18 of this cam 19 vibrates back and forth from side to side, vibrating the vibrating body 11 in the same direction. The inner cutter 14 vibrates back and forth from side to side due to the vibration.

(Means for attaching the outer cutter) A mesh-like outer cutter 23 is removably fitted onto the head case 4 via an outer cutter holder 24.
The inner cutter 14 comes into sliding contact with the inner surface. The outer cutter holder 24 has means for maintaining the attached state to the head case 4. As a specific example of the mounting and holding means, a moderation plate 7 and an engaging member 10 used for regulating the swing angle position of the head case 4 are used. That is, the engagement button 26 is fitted into the openings 25 formed in the left and right side walls of the head case 4 so as to be movable in and out of the case and prevented from coming out in the direction outside the case.
The engaging element 10 is protrusively fixed to the inner end surface of the engaging button 6, and the outer end surface 26a of the engaging button 26 is formed to have a mountain-shaped cross section. Thus, the engagement button 26 is always urged to protrude due to the elasticity of the moderation plate 7, and the retaining recesses 27 formed on the inner surfaces of the left and right side walls of the outer blade holder 24 are inserted outwardly into the outer end surface 26a of the engagement button 26. It can be freely engaged and detached as the blade holder 24 is attached and detached.

(Interior parts to main body case) In addition to the motor 16, a battery 28 for supplying power to the motor 16 and a pressed circuit board 29 are built inside the main body case 1. On the press circuit board 29, an inner blade drive switch 30 for opening and closing the current supply circuit to the motor 16, a transformer 31, etc. are assembled.

(On/off mechanism of inner blade drive switch) In FIGS. 1 to 8, large and small button holes 32, 32 are opened side by side on the left and right, and a push-type first operation button 33 and a second push-type operation button 34 are fitted into each button hole 32, respectively, and when the inner blade drive switch 30 is turned on by pushing the first operation button 33, the inner blade drive switch 30 is turned on. At the same time, the head case 4 changes to the tilted position, and when the inner blade drive switch 30 is turned off by pushing the second operation button 34, the head case 4 returns to the upright position.

That is, there is a seesaw plate 3 inside the main body case 1.
5 are arranged corresponding to the first operation button 33 and the second operation button 34. The seesaw plate 35 is bent into a dogleg shape, and a fulcrum part 35a, which is an intermediate bent part in the longitudinal direction, is placed on a support plate 36 hanging downward from the mounting base 3, and one end is placed from the fulcrum part 35a. The first operation button 33 is attached to the ON operation emphasis section 37 on the other end 35b, and the second operation button 34 is attached to the OFF operation emphasis section 38 on the other end 35c. As shown in FIG. 1, the length a from the fulcrum 35a to the OFF operation force point 38
It is set to be sufficiently shorter than the length b from a to the power point portion 37 for ON operation. And the first operation button 33
A switch operation piece 39 is attached to the tip of one end 35b of the seesaw plate 35 to which the inner blade drive switch 3 is attached.
0 position, and the second operation button 34
A swing operation piece 40 is formed at the tip of the other end 35c of the seesaw plate 35 to which the seesaw plate 35 is attached.
0 is connected to the head case 4 via a swing plate 41. The swing plate 41 is formed in a generally triangular shape,
It is attached to the right side wall inside the main body case 1 so as to be able to swing around a shaft 42, and the shaft 4 on the front end bevel 43
A pin 44 is provided protrudingly at the end lower than 2, and this pin 44 is engaged with a long hole 45 formed in the swing operation piece 40 to be elongated in the vertical direction.
A pin 46 is also projectingly provided at the end above the shaft 42 of the head case 4, and this pin 46 is engaged with a long hole 48 of a lever 47 projecting downward from the right end of the head case 4.

In this case, when the seesaw plate 35 moves one end 35b rearward and the other end 35c forward about the fulcrum 35a by pushing the first operation button 33, the switch operation piece 39 engages the inner blade drive switch 30. At the same time, the swing plate 41 swings around the shaft 42 in the direction of arrow A in FIG. is rotated around axis 5 into a tilted position. When the seesaw plate 35 is pushed in the opposite direction by pushing the second operation button 34, the switch operation piece 39 moves the inner blade drive switch 30.
is turned off, and at the same time the oscillating plate 41 is turned off to the shaft 42.
The head case 4 swings around in the opposite direction to the above.
Return to the upright position and rotate around axis 5. At this time, since the length b between the fulcrum part 35a of the seesaw plate 35 and the force point part 37 for ON operation is sufficiently longer than the length a between the fulcrum part 35a and the force point part 38 for OFF operation,
Although the inner blade drive switch 30 can be turned on with a small pressing force and the head case 4 can be placed in a tilted position, a larger pressing force is required to press the turning-off operation force point 38. This reduces the occurrence of a situation where the inner blade drive switch 30 is turned off due to the OFF operation force point 38 being inadvertently pushed and moved by the hand gripping the main body case 1 during use. Further, as shown in FIG. 1, the movement stroke d of the force point part 38 for the OFF operation is smaller than the movement stroke c of the force point part 37 for the ON operation. Therefore, the amount of protrusion of the second operation button 34 from the main body case 1 can be made smaller than the amount of protrusion of the first operation button 33 from the main body case 1.
This prevents the second operation button 34 from being inadvertently pressed when the switch is turned on.

A locking means is provided to prevent the head case 4 from swinging or the inner blade drive switch 30 from being turned on by pressing the first operation button 33 during carrying or storage. The locking means is provided with a lock button 49 on the outer surface of the right side wall of the main body case 1 so as to be slidable in the vertical direction.The lock button 49 has a lock pin 50 on the inner surface thereof. In the middle, as shown in virtual line state B, the swing plate 4
The oscillating plate 41 is located at a position below the shaft 42 on the front end bevel 43 of 1, so that the oscillating plate 41 does not swing even if the first operation button 33 is pushed, and when the lock button 49 is slid downward. As shown by the solid line C in FIG.
The oscillating plate 41 can be swung as described above through the oscillator.

[Another example]

The entire details of the embodiments shown in FIGS. 1 to 8 are as described above, but the present invention is not limited thereto. For example, as shown in FIG. 9, the force point part 37 for the ON operation and the force point part 38 for the OFF operation of the seesaw plate 35 are exposed on the outer surface of the main body case 1 without the operation buttons 33 and 34 attached. Then, the force points 37 and 38 may be directly pressed with fingers.

Further, the electric shaver is not limited to a swinging type electric shaver, and can be similarly applied to a regular type that cannot swing. In this case, it goes without saying that the seesaw plate 35 does not need to have a swinging function.

Further, the driving power source may be a battery type, a battery type, an AC type, or only an AC type.

[Effect of idea]

As explained above, in the electric shaver of this invention, the length a between the OFF operation force point 38 and the fulcrum 35a of the seesaw plate 35 is longer than the length b between the ON operation force point 37 and the fulcrum 35a. By simply setting it short, it is possible to make the pressing operation of the OFF operation force point part 38 heavier, and the amount of protrusion of the OFF operation force point part 38 from the main body case 1 can be reduced as much as possible. Therefore, there is less fear that the switch may accidentally turn off during use and cause hair to be caught, and the structure is also simplified.On the other hand, the on operation can be easily performed with a small force, making it easy to use. .

[Brief explanation of the drawing]

1 to 8 show an embodiment of the electric shaver according to the present invention.
The figure is a cross-sectional view of the main part showing the first operation button being pressed, Figure 3 is a perspective view of the overall appearance, Figure 4 is an exploded perspective view of the on/off operation system of the inner blade drive switch,
Figure 5 is a sectional view of the head case in an upright position, Figure 6 is a sectional view of the head case in a tilted position, Figure 7 is a longitudinal front view, and Figure 8 is a longitudinal side view. It is a diagram. FIG. 9 is a sectional view of a main part of an electric shaver showing another embodiment of the present invention. 1... Main body case, 30... Inner blade drive switch, 35... Seesaw plate, 35a... Fulcrum part of seesaw plate, 35b... One end of seesaw plate, 35c... Other end of seesaw plate, 37... On Operation force point, 38
...Power point for off operation.

Claims (1)

[Scope of utility model registration request] The main body case 1 is equipped with an inner blade drive switch 30 and a seesaw plate 35, and the seesaw plate 35 is installed to be able to swing freely around a fulcrum part 35a located in the middle in the longitudinal direction.
A power point part 37 for ON operation is provided on the upper end 5b, and a power point part 38 for OFF operation is provided on the other end 35c, and the power point part 37 for ON operation and the power point part 38 for OFF operation are alternately pushed to create a seesaw board. In an electric shaver in which the inner cutter drive switch 30 is turned on and off by tilting the switch 35, the length a from the power point 38 for turning off operation to the fulcrum 35a is
is set to be shorter than the length b between the power point part 37 for ON operation and the fulcrum part 35a.