JPH0442033B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric shaver in which a head case having inner and outer cutters is swingably attached to a main body case.

[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 seeks to solve]

In such a conventional configuration, when an external force is applied to the head case in the direction of swing while the head case is carried in a bag or the like, the head case switches to a tilted position, and the inner cutter may be driven inadvertently.

The present invention has focused on this fact, and aims to provide a device that can be carried safely so that the inner blade drive switch will not be turned on even if the head case is inadvertently changed to a tilted position due to an external force. .

[Means for solving problems]

In order to achieve the above object, in this invention, as shown in FIG. An interlocking mechanism S is provided between the head case 4 and the head case 4 to swing and swing the head case 4 in conjunction with the ON operation of the operation button. The interlocking mechanism S includes a pin 46 provided on one side of the operation button or the head case 4, and a cam groove 48 provided on the other side with which the pin 46 is slidably engaged.
The cam groove 48 has an operating part 48a for swinging the head case 4 and a drive switch input part 48b, and the drive switch input part 48b is connected to the swinging part 48a. It is located at the edge outside the area.

〔Effect of the invention〕

According to the above configuration, when the operation button is turned on, the head case 4 can be swung via the swiveling portion 48a of the cam groove 48, and the drive switch input portion 48b is also used for the swiveling motion. Section 48a
Since the position is set at the end of the head case 4, even if an external force is applied to the head case 4 and the case 4 swings, the drive switch 30 will not be turned on, and inadvertent driving of the inner blade can be prevented. This eliminates wastage of drive motors and batteries.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric shaver according to the present invention will be described below with reference to the drawings.

First Embodiment In FIGS. 4 and 5, the main body case 1 of the electric shaver is made of plastic front and rear cases 1.
a and 1b are butted together and integrally connected with screws etc. to form a rectangular tube shape.A mounting base 3 is fixed to the top of the main body case 1, and a head case 4 is attached to the top of the mounting base 3. The main body case 1 is pivotally connected so as to be swingable and slidable about the shaft 5 between an upright position in which the main body case 1 is substantially in a straight line with respect to the main body case 1 and a tilted position in which the main body case 1 is inclined toward the front side.

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
Engagement elements 10, 10 provided on the left and right inner surfaces of the head case 4 are inserted into one of the holes 8, 9 provided at two positions in the front and back of the elastic moderation plates 7, 7 provided upright at the left and right ends of the head case 4.
is selectively engaged, and the head case 4 is now in the fourth position.
The position is restricted to the upright posture shown in the figure and the tilted posture shown in FIG. 5, respectively. At this time, in the tilted state, the front lower end of the head case 4 hits the front upper end of the main body case 1 and is prevented from tilting any further.

(Inner blade drive mechanism) In FIGS. 6 and 7, a plastic drive body 11 that elastically swings and deforms in the left-right direction is attached to the inside of the head case 4.
A pin 12 is provided tilting forward at the center of the upper end surface and protrudes upward from the central opening 13 of the head case 4, and is attached to this pin 12 via an inner cutter 14 and an inner cutter holder 15. There is. Motor 1 inside main body case 1
6, the motor shaft 16a of which protrudes upward from the opening 17 of the mounting base 3;
Eccentric cam 19 having an eccentric pin 18 at the protruding end of a
is fixed. A slider 21 is slidably engaged in a concave groove 20 provided in the front-rear direction on the lower surface of the vibrating body 11, and an eccentric cam 19 is engaged in a longitudinally long long groove 22 provided in the lower surface of the slider 21. are doing. The eccentric cam 19 is now rotated by the drive of the motor 16, and the slider 21, which engages with the cam 19 and the eccentric pin 18, vibrates back and forth to the left and right, vibrating the vibrating body 11 in the same direction. The inner cutter 14 vibrates back and forth from side to side.
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. that open and close the energization circuit to 16 are assembled.

(On/off mechanism for swing operation mechanism and inner blade drive switch) In FIGS. 8 and 9, there is a , a push-type first operation button 33 and a second operation button 34 are arranged side by side.
When the first operation button 33 is pushed, the head case 4 is tilted to a predetermined swing angle, for example, 15 degrees, so that the front lower end of the head case 4 collides with the front upper end of the main body case 1 via the swing linkage mechanism S. At the same time as the posture changes, the inner blade drive switch 30 is turned on. When the head case 4 returns to the upright position by pushing the second operation button 34, the inner blade drive switch 30 is turned off.

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 is placed on a support plate 36 hanging downward from the mounting base 3, which is a branch part 35a, which is a bent part in the center, and one end 35b from the branch part 35a.
The first operation button 33 is on the top, and the second operation button is on the other end 35c.
Operation buttons 34 are respectively attached, and the first
By alternately pushing the operating button 33 and the second operating button 34, the one end 35b and the other end 35
c goes back and forth alternately. A switch operation piece 39 is formed at the tip of one end 35b of the seesaw plate 35 on which the first operation button 33 is mounted, extending to the position of the inner blade drive switch 30.

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 swing 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 lower end of the swing plate 41 by the shaft 42 of the front beveled edge 43. The pin 44 is provided in a protruding manner, and the 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 swing 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 cam groove 48 of a lever 47 that protrudes downward from the right end of the head case 4 toward the oscillating plate 41. It is linked to the head case 4.

In FIG. 1, the cam groove 48 is formed in a generally arc shape and has a swinging and swinging portion 48a, and one end side (swinging tip side) of the swinging and swinging portion 48a.
A drive switch input portion 48b is provided at the other end (swing base end side), and a portion 48c is provided at the other end (swing base end side).

The length of the cam groove 48 is longer than the length of the groove necessary for swinging. When the head case 4 is in the upright position as shown in FIG.
It is set so as to be located between the swinging portion 48a and the relief portion 48c of No.8. Note that a shallow locking recess into which the pin 46 falls is formed in the drive switch input portion 48b of the cam groove 48. The cam groove 48 and the pin 46 are connected to the center line S ₁ connecting the centers of the shaft 5 and the pin 46 and the oscillating plate 41 when the head case 4 is in the tilted position as shown in FIG. shaft 42
and a line _S2 connecting the centers of the pins 46 are set so that they are substantially perpendicular to each other.

In addition, in order to prevent the head case 4 from being inadvertently switched to the tilted position, the lever 47 and the main body case 1
A spring means 52 is interposed between the head case 4 and the head case 4 to press and bias the head case 4 toward the upright position. The spring means 52 is made of a plate spring bent into a U-shape, and one plate surface thereof 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 swinging plate 41 swings around the shaft 42 in the direction of arrow A in FIG. The main case 4 is swung into a tilted position about the shaft 5 until the lower front end thereof abuts the upper front end of the main case 1. At the same time as the tilting of the head case 4 is completed, the pin 46 reaches the drive switch input part 48b at the end of the swinging motion part 48a of the cam groove 48.
At this time, the switch operation piece 39 of the seesaw plate 35 contacts the inner cutter drive switch 30 and turns it on.

At this time, the center line S ₁ on the cam groove 48 side of the head case 4 is approximately perpendicular to the center line S ₂ of the swing plate 41, and the pin 46 is in the locking recess 48a.
Therefore, even if the outer cutter 23 is strongly pressed against the skin surface when the head case 4 is in a tilted position, and a load is applied to the head case 4 in the direction of rotation to return it to the upright position. Since the swinging plate 41 exerts a tensioning action to prevent the head ace 4 from swinging back, the head case 4 will not accidentally swing back. At this time, the bending means 52 is pushed by the lever 47 and is largely deformed. Therefore, the locking recess 48 is pressed into contact with 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 formed by the center portions S ₁ and S ₂ 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 This is also advantageous in preventing damage to the swing plate 41 due to twisting or the like.

When the seesaw plate 35 is pushed in the opposite direction by the push operation of the second operation button 34,
The swing plate 41 swings around the shaft 42 in the opposite direction, returning the head case 4 to the upright position around the shaft 5, and at the same time, the switch operation piece 39 turns off the inner blade drive switch 30. .

When carrying, the moderation plate 7 and the engaging element 1 are attached to the head case 4 in an upright position as shown in FIG.
When a strong external force in the swinging direction is applied against the stop holding force of 0 and the urging force of the spring means 52,
As soon as the head case 4 swings in that direction as shown in FIG. 10, the relief portion 48c of the cam groove 48 is driven to approach the pin 46 and come into contact with it. Until the point of contact, the swing plate 41 is in a static state. Then, when the head case 4 is further strongly pushed in the same direction, the pin 46 is pushed by the relief part 48c, causing the swing plate 41 to swing around the shaft 42 in the switch closing direction, but the head case 4 At the time when the front lower end hits the front upper end of the main body case 1 and the swing plate 41 changes to a completely tilted position, the swing plate 41 is swung by only a small angle. is less than the swing angle required to turn on the switch, so the inner cutter drive switch 30 is never turned on.

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. virtual line state D
As shown in , it is located at a lower position than the end 42 on the front end bevel 43 of the swing plate 41, and prevents the swing plate 41 from swinging even if the first operation button 33 is pushed. When the lock pin 50 is slid downwardly, the lock pin 50 moves to the front end slanted edge 43 of the oscillating plate 41 as shown by the solid line E in FIG.
The oscillating plate 41 can be swung as described above via the seesaw plate 35 by pushing the first operation button 33 downwardly.

When the head case 4 is carried around without being locked with the lock button 49, even if the head case 4 is inadvertently swung as described above, the inner cutter will not be driven.

Second Embodiment The same parts as in the first embodiment are denoted by the same reference numerals, and the explanation thereof will be omitted.

In FIG. 11, the cam groove 48 is located at the relief portion 4.
8c is not included, and the swinging motion part 4
8a and the switch input part 48 provided at the end of this
b. In the case of this embodiment, when the head case 4 is in an upright position, the pin 46 is set to be located at the swing base end side of the cam groove 48 on the opposite side from the switch input portion 48b.

In such a case, when the operation button 33 is pressed during use, the swing plate 41 swings around the shaft 42 through the swing of the seesaw board 35, and the pin 4
6 slides the swinging portion 48a of the cam groove 48 to change the head case 4 into a tilted position (see FIG. 12). After the tilting is completed, when the operation button 33 is pressed further, the swing plate 41 swings further in the same direction as described above, as shown in FIG. 4
When the switch operation piece 39 reaches the switch input part 48b at the end of the blade 8a, the inner cutter drive switch 30 is turned on.

Furthermore, even if the head case 4 is tilted due to an external force until its front lower end hits the front upper end of the main body case 1, the pin 4 will not move as shown in FIG.
Since the blade 6 slides on the swinging portion 48a and stops at a position in front of the switch input portion 48b, the inner cutter drive switch 30 is not turned on.

The entire details of the illustrated embodiment are as described above.
The present invention is not limited to this. for example,
The pin 46 may be provided on the head case 4 side, and the cam groove 48 may be provided on the swing plate 41 side. However,
When the cam groove 48 is provided on the head case 4 side, the lever 47 may be omitted by opening directly in the side wall thereof.

The means for swinging the swinging plate 41 by operating the operating buttons 33 and 34 does not necessarily require the seesaw board 35, and the swinging board 41 may be swinged directly by operating the operating buttons 33 and 34. can.

The inner blade driving power source may be a battery type or a type that can be used for both electric and AC power sources.

The operation mode of the operation buttons 33 and 34 may be a slide type other than a push type. In the case of a sliding type, a single operation button (33 or 34) is sufficient.

The spring means 52 is not necessarily required and may be omitted.

The present invention also includes a device in which the head case 4 is tilted by turning on the operation button 33, and when the head case 4 is returned to an upright position, the head case 4 is directly pushed back by hand.

[Brief explanation of drawings]

1 to 9 show a first embodiment of an electric shaver according to the present invention, in which FIG. 1 is a side view schematically showing the main mechanism, FIG. 2 is a perspective view of the overall appearance, and FIG. Figure 3 is an exploded perspective view of the swing operation system of the head case, Figure 4 is a cross-sectional view of the head case in an upright position, and Figure 5 is a cross-section of the head case in a tilted position. Fig. 6 is a longitudinal front view, Fig. 7 is a longitudinal side view, Fig. 8 is a partial sectional view showing the state in which the second operating button is pressed, and Fig. 9 is a partially sectional view showing the state in which the first operating button is pressed. The partially sectional view shown in FIG. 10 is a schematic side view when the head case is tilted due to external force. 11 to 13 show a second embodiment of the present invention, in which FIG. 11 is a schematic side view of the head case in an upright position;
FIG. 13 is a schematic side view with the head case in a tilted position and the drive switch turned on. 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... cam groove, 48a... oscillating swinging part, 48b... switch input part.

Claims (1)

[Claims] 1. A head case 4 having inner and outer blades 14, 23 is pivotally connected to the main body case 1 so as to be swingable around a shaft 5 in an upright position and a tilted position, and is attached to the main body case 1. An operation button for turning on and off the drive switch 30 of the inner cutter 14 and the head case 4 are connected to a pin 46 provided on either the operation button side or the head case 4 side, and a pin 46 provided on the other side. Cam groove 4 that slidably engages
8, and when the operation button is turned on, the head case 4 swings through the engagement of the cam groove 48 and the pin 46,
The cam groove 48 has a part 48a for swinging the head case 4 and a drive switch input part 48b, and the drive switch input part 48b is provided at the end of the part 48a for swinging the head case 4. Even if an external force acts on the case 4 and the case 4 swings, the drive switch 30
An electric razor characterized by being configured so that it does not turn on.