JPH0122617Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electric shaver in which a head case having inner and outer cutters is attached to the main body case so as to be swingable.

[Conventional technology]

A conventional example of this type of swing-type electric shaver is disclosed in, for example, Japanese Unexamined Patent Publication No. 57-37472.

This has a slidable operation button on the outer surface of the main body case that turns the inner blade drive switch on and off, and an interlocking mechanism between the operation button and the head case, so that the operation button can be slid in the switch-on direction. Then, the inner blade drive switch turns on and the head case tilts, and when the operation button is slid in the opposite direction, the inner blade drive switch turns off and the head case returns to its original upright position. ing.

[Problem that the invention attempts to solve]

In such a conventional method, when the outer blade of the head case is strongly pressed against the skin surface during shaving, the inner blade drive switch is turned off at the same time as the head case returns to its original upright position due to the reaction force. There was a concern that the hair would get caught in the beard, giving the user a scratchy feeling.

In addition, if an external force is applied to the head case in the direction of swinging, or if the head case is operated directly due to lack of understanding of how to use it, the posture of the head case may be inadvertently changed to a tilted position, causing the inner blade to There were times when I was driven. Depending on the interlocking mechanism between the operation button and the head case, even if it was impossible to change the posture, the head case would be in a partially tilted position, which could be mistaken for a malfunction.

This invention focuses on this fact, and prevents the head case from changing its posture as much as possible.
The purpose is to make it possible to use an electric shaver properly at all times.

[Means for solving the problem] In order to achieve the above object, in this invention, as shown in FIG. 1, an operation button for turning on and off the inner blade drive switch 30 is provided on the main body case 1 side, and An interlocking mechanism S for swinging and rotating the head case 4 in conjunction with the switch-on/off operation of the operation button is provided between the head case 4 and the swingable head case 4. A spring means 52 is provided within the main body case 1, acting on the interlocking mechanism S to maintain the head case 4 in an upright position. For example, the fourth
As shown in the figure, a spring means 52 made of a plate spring is interposed between the lever 47 and the main body case 1. As a result, even if an external force is applied to the head case 4 or if the head case 4 is directly operated due to lack of understanding of how to use it, the spring means 52 will cause the head case 4 to swing back to the upright position. , so that inadvertent switching can be prevented.

〔Example〕

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

(Main body case structure) In FIGS. 4 and 5, the main body case 1 is formed into a rectangular tube 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 swingable.

Specifically, the shafts 5 protruding from the left and right ends of the mounting base 3,
5, shaft holes 6, 6 recessed in the left and right inner surfaces of the head case 4 are rotatably fitted, and the mounting base 3
The engaging elements 10, 10 provided on the left and right inner surfaces of the head case 4 are selectively inserted into one of the holes 8, 9 provided at the front and rear of the elastic moderation plates 7, 7 installed upright at the left and right ends of the head case 4. When engaged, the head case 4 is positioned in the upright position shown in FIG. 4 and in the tilted position shown in FIG. 5, respectively.

(Inner blade drive mechanism) In FIGS. 6 and 7, 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, and a vibrator 1
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. The main body case 1 has a motor 16 inside, a motor shaft 16a of which projects upward from an opening 17 of the mounting base 3, and an eccentric cam 19 having an eccentric pin 18 fixed to the projecting end of the motor shaft 16a. ing. A slider 21 is installed in a groove 20 provided in the front-rear direction on the lower surface of the vibrating body 11.
The eccentric cam 19 is engaged with a longitudinally long groove 22 provided on the lower surface of the slider 21 in a slidable manner. Now, the eccentric cam 19 is rotated by the drive of the motor 16, and this cam 1
The slider 21 engaged with the eccentric pin 18 of 9 reciprocates left and right to vibrate the vibrating body 11 in the same direction, and this vibration causes the inner cutter 14 to reciprocate left and right. A mesh-shaped outer cutter 23 is removably fitted onto the head case 4 via an outer cutter holder 24, and the inner cutter 14 is in sliding contact with the inner surface of the outer cutter 23.

(Interior parts to main body case) In addition to the motor 16, a battery 28 for supplying power to the motor 16 and a press circuit board 29 are built into the main body case 1. The motor is mounted on the press circuit board 29. An inner blade drive switch 30, a transformer 31, etc., which open and close the energization circuit to 16 are assembled.

(Swing operation mechanism and inner blade drive switch on/off mechanism) In FIGS. 8 and 9, on the front outer surface of the main body case 1 on the same side as the tilting direction of the head case 4, A push-type first operation button 33 and a second operation button 34 are arranged side by side.
When the inner blade drive switch 30 is turned on by pushing the first operation button 33, the head case 4 changes to a tilted position via the swinging interlocking mechanism S. 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 a bent part at the center, is placed on a support plate 36 hanging downward from the mounting base 3, and one end 35 is bent from the fulcrum part 35a.
A first operating button 33 is mounted on the upper end 35b, and a second operating button 34 is mounted on the other end 35c.By alternately pushing the first operating button 33 and the second operating button 34, one end 35b and the other end 35c are connected. edge 3
5c alternates back and forth. A switch operation piece 39 is formed extending to the position of the first switch 30 at the tip of one end 35b of the seesaw plate 35 on which the first operation button 33 is attached.

Inside the main body case 1 is a swinging interlocking mechanism S that interlocks and connects the head case 4 and the operation button, and this is constructed as follows. A swing operation piece 40 is formed at the tip of the other end 35c of the seesaw plate 35 on which the second operation button 34 is attached.
is connected to the head case 4 via a swing plate 41. The oscillating plate 41 has a generally triangular shape, and is attached to the right side wall of the main body case 1 so as to be able to swing around a shaft 42. A pin 44 is attached to the end of the front beveled edge 43 below the shaft 42. is provided in a protruding manner, and this pin 44 is engaged with a long hole 45 formed in the operating piece 40 to be elongated in the vertical direction, so that the oscillating plate 41 is linked to the seesaw plate 35. Further, a pin 4 is also provided at the end above the shaft 42 of the front end bevel 43 of the swing plate 41.
6 is provided in a protruding manner, and this pin 46 is slidably engaged with a long hole 48 in a lever 47 that protrudes downward from the right end of the head case 4 toward the swing plate 41.
A swing plate 41 is linked to the head case 4.

In FIG. 1, the elongated hole 48 is formed in an arc shape, and a shallow locking recess 48a into which the pin 46 falls is formed at its swinging tip. The long hole 48 and the pin 46 are connected to the center line S ₁ of the pin 46 and the axis 4 of the swing plate 41 when the head case 4 is in a tilted position.
2 and the line _S2 connecting the centers of the pins 46 are set so that they are substantially perpendicular to each other.

In order to prevent the head case 4 from being inadvertently switched to the tilted position, a spring means 52 is interposed between the lever 47 and the main body case 1, and the spring means 52 is used to push the head case 4 toward the upright position. energize. Spring means 5
2 consists of a leaf spring bent into a U shape,
One of the plate surfaces is fixed to the main body case 1.

In such a case, by pushing the first operation button 33, the seesaw plate 35 moves the end 35b backward,
When the other end 35c is moved forward, the switch operation piece 3
9 contacts the inner blade drive switch 30 and turns it on, and at the same time, the oscillating plate 41 oscillates around the shaft 42 in the direction of arrow A in FIG. 4 through engagement between the pin 44 and the elongated hole 45. The head case 4 is swung to a tilted position around the shaft 5 while resisting the pressure of the spring means 52. At this time, since the elongated hole 48 is formed in an arc shape, the head case 4 can be smoothly swung approximately in proportion to the amount of swiveling of the swing plate 41, and the operation is easy. Also, head case 4
The center line _S1 on the elongated hole 48 side and the center line of the swing plate 41
Since the pin 46 is substantially perpendicular to S ₂ and the pin 46 is fitted into the locking recess 48a, the outer cutter 23 is strongly pressed against the skin surface when the head case 4 is in a tilted position. Even if a load is applied to the head case 4 in the direction of rotation to return it to the upright position, the swing plate 41 exerts a tensioning action to prevent the head case 4 from swinging back. The case 4 will not return unexpectedly and swing. At this time, the spring means 52 is pushed by the lever 47 and is largely deformed. Therefore, the locking recess 48a is pressed against the pin 46, and displacement movement is restricted. Thereby, the tilted posture of the head case 4 can be reliably maintained in cooperation with the above-mentioned tensioning action.

Note that if the angle α is slightly smaller than 90 degrees, the tensioning action of the swing plate 41 will be performed more reliably, and if it is slightly larger than 90 degrees as shown in the illustrated example, the lever 47 and the swing plate 41 may be twisted. This is advantageous in preventing damage.

When the seesaw plate 35 is pushed in the opposite direction to the above-described direction by pushing the second operation button 34,
The switch operation piece 39 turns off the inner blade drive switch 30, and at the same time, the oscillating plate 41 swings around the shaft 42 in the opposite direction, returning the head case 4 to the upright position around the shaft 5. let Even in this state, the lever 47 is pressed by the spring means 52. Therefore, even if an external force acts on the head case 4 to tilt it, the spring means 52 acts against the external force to prevent the head case 4 from tilting, and the engager 10 moves together with the head case 4. is hole 8 of moderation plate 7
Head case 4 unless it is stuck and locked in the head case 4.
Return to the upright position and rotate. Thereby, it is possible to prevent the head case 4 from inadvertently switching from an upright position to a tilted position.

In addition, in FIGS. 4 and 5, when carrying, storing, or storing the first operation button 33, the head case 4 is pressed to prevent the head case 4 from inadvertently swinging or the inner blade drive switch 30 to be turned on. is provided with locking means. 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. As shown in virtual line state D, the shaft 4 on the front end oblique edge 43 of the swing plate 41
2, so that the oscillating plate 41 does not swing even if the first operation button 33 is pressed, and when the lock button 49 is slid downward, the lock pin 50 moves as shown in the solid line in FIG. As shown in state E, the swing plate 41 is disengaged downward from the front end oblique edge 43, and the swing plate 41 is made to swing as described above via the seesaw plate 35 by pushing the first operation button 33. be.

In FIG. 2, a water droplet-shaped shallow groove 53 is formed on the surface of the front case 1a where the first operation button 33 is exposed.
has. The groove 53 has the center line of symmetry of the waterdrop shape inclined so that the operating button 33 almost matches the inclination of the right thumb when the electric shaver is held with the right hand.

[Another example]

The entire details of the embodiments shown in FIGS. 1 to 9 are as described above, but the present invention is not limited thereto. For example, if the pin 46 is placed on the head case 4 side,
The long holes 48 may be provided on the swing plate 41 side. However, the elongated hole 48 may be opened directly in the side wall of the head case 4 and the lever 47 may be omitted.

The seesaw plate 35 is not necessarily required as a means for swinging the swinging plate 41 by operating the operating buttons 33 and 34, and the swinging board 41 can also be swinged directly by operating the operating buttons 33 and 34. .

The power source for driving the inner blade may be a battery type or a type that can use both a battery and an AC power source.

The operation mode of the operation buttons 33 and 34 may be a slide type other than a push type. However, even when a single operation button 33 or 34 is operated, the head case 4 is switched between the upright position and the tilted position through the swinging of the swing plate 41 at the same time as the inner blade drive switch 30 is turned on and off. It's okay. In this case, when one operation button is pressed, the inner blade drive switch 30 is turned on and the head case 4 is tilted at the same time, but it does not return to its original position even after releasing the button, and when pressed again, it returns to its original position. The head case 4 may return to the upright position at the same time as the inner cutter drive switch 30 is turned off.

The spring means 52 may be formed of a coil spring other than a leaf spring, a torsion coil spring, or the like, and the spring means 52 may be installed between the swing plate 41 and the main body case 1 or around the shaft 5.

[Effect of idea]

As explained above, this invention connects the operation button and the head case 4 by the swinging interlocking mechanism S,
The head case 4 can be switched between an upright position and a tilted position by operating an operation button, and the head case 4 is always rockingly biased to the upright position by the spring means 52 acting on the interlocking mechanism S. This makes it possible to prevent the head case 4 from being inadvertently switched to the tilted position, and even in cases where the head case 4 is forcibly tilted due to lack of understanding of how to use it, etc. It can be swung back to an upright position to encourage proper use. At the same time, it is possible to prevent abnormal forces from acting on interlocking mechanisms such as the lever 47 and the oscillating plate 41, thereby preventing breakdowns from occurring. There is no possibility that the head case 4 will be mistakenly assumed to have malfunctioned due to being in a tilted position.

[Brief explanation of the drawing]

The drawings show an embodiment of the electric shaver according to the present invention, in which Fig. 1 is a side view conceptually showing the main mechanism, Fig. 2 is a perspective view of the overall appearance, and Fig. 3 is a head case. Figure 4 is a cross-sectional view with the head case in an upright position, Figure 5 is a cross-sectional view with the head case in a tilted position, and Figure 6 is a cross-sectional view of the head case in a tilted position. Vertical front view, Figure 7 is a vertical side view,
FIG. 8 is a partial sectional view showing the second operating button in a pressed state, and FIG. 9 is a partial sectional view showing the first operating button in a pressed state. 1...Body case, 4...Head case, 5...
Shaft, 14...Inner blade, 23...Outer blade, 30...Inner blade drive switch, 33, 34...Operation button, 41
... Swing plate, 42... Swing plate shaft, 46...
Pin, 48...Elongated hole, 52...Spring means, S...
Swing link mechanism.

Claims (1)

[Scope of utility model registration request] Consisting of a main body case 1 and a head case 4 having inner and outer blades 14 and 23, the main body case 1 and the head case 4 are arranged in an upright position in which the head case 4 is substantially in a straight line with respect to the main body case 1, and in an inclined position. An operation button that is attached to the main body case 1 and turns on and off the drive switch 30 of the inner blade 14 and the head case 4 are pivotally connected to each other so as to be able to swing and swing across the tilted posture.
are connected via a swinging interlocking mechanism S,
An electric shaver characterized in that a spring means 52 is provided in the main body case 1 for swinging and biasing the head case 4 into an upright position.