JPH0245475B2 - DENKI KAMISORI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an improvement to an electric shaver having a configuration in which a razor head portion having inner and outer blades can be tilted in the front-rear direction so that the outer blades can be easily applied to the skin during use, making it easy to use. It depends.

If this type of electric shaver is equipped with a second battery as a backup power source in addition to the first battery that is normally used, and is equipped with a switch to selectively switch between the first battery and the second battery, it will be possible to: Benefits such as: In other words, when a rechargeable battery is used as the first battery for normal use, when the capacity of that battery decreases due to use, a spare second battery can be used by operating the selector switch. There is the convenience of being able to use this razor immediately even after the capacity of the first battery decreases without waiting for the time required to charge one battery.

However, in this case, if the changeover switch is operated by one common operation knob, the operation knob will be moved to switch between two positions, the first battery drive position and the second battery drive position. According to this article, the vehicle sometimes mistakenly moves to the second battery drive position when it should have stopped at the first battery drive position.
If the second battery is used without being aware of this, the capacity of the second battery will be reduced unexpectedly, and when the second battery is needed, the second battery will no longer be used.

In addition, if a single switch operation knob is used to drive both the first and second batteries, the frequency of use of that shared operation knob will increase, making it more likely that the operation knob will be damaged or malfunction early. This may lead to the worst situation in which both the first battery and the second battery cannot be driven.

Focusing on this fact, the present invention is based on the premise that a first battery for normal use and a spare second battery are built-in, and the operation of opening and closing energization to the load of each battery is performed by a dedicated switch for each battery. The first purpose is to prevent the above-mentioned conventional erroneous operation in which the load is driven by the second battery when it should be driven by the first battery, by allowing the operation knob to be used independently. do.

A second purpose is to reduce as much as possible damage and failure of the operating knob for driving the first battery, which is used during normal operation.

Furthermore, in the case of an electric shaver whose head part can be tilted forward and backward, when using the head part with the head part tilted forward, the front side of the head part, which is the tilted side, should face toward you and be placed on the front side of the main body case. Shaving is performed with the thumb in the grip position, and on the other hand, when using the head with the head tilted backwards, the tilted side of the head (the rear side) faces toward you and the thumb is hung on the rear side of the main body case. This will be used in a grip position. That is, during use, the thumb of the hand that grips the main body case is changed so that it is hooked onto the front or rear surface of the main body case in accordance with the direction in which the head section is tilted. The present invention has focused on this, and by arranging the first switch operation knob and the second switch operation knob on different surfaces of the front and rear surfaces of the main body case corresponding to the tilting direction of the head part, it is possible to perform both operations. The third purpose is to make it easier to use different knobs, to prevent misidentification and confusion during operation, and to improve usability.

The details will be explained below based on the drawings.

1 to 3 show an embodiment of an electric shaver according to the present invention, in which a main body case 1 has a head portion 2 which can be tilted back and forth in the upper part.
has. The head portion 2 includes an outer cutter 3 and an outer cutter 3.
and an inner cutter 4 that comes into sliding contact with the inner surface of the blade. Inside the main body case 1, there is a motor 5 that drives the inner blade 4;
A first battery 6 for normal use and a second battery 7 for backup are built in to supply power to the motor 5. The first battery 6 and the second battery 7 may be either storage batteries or dry batteries, and it does not matter whether they are rechargeable or not. For example, the first battery 6 may be an AA-sized nickel cadmium storage battery, and the second battery 7 may be an AA-sized dry battery, with different battery capacities.

The first switch operation knob 8 opens and closes the energizing circuit of the first battery 6 to the motor 5, and the second battery 7
A second switch operation knob 9 for opening and closing the current supply circuit to the motor 5 is attached to the front and rear surfaces 1a and 1b of the square cylindrical main body case 1, respectively. Both the first switch operation knob 8 and the second switch operation knob 9 are push type, and these knobs 8 and 9 are operated by an operating rod 1 that protrudes from the knob 8 side.
Connect via 0. The operating rod 10 has an operating piece 11
The normally open contact 13, which is interposed in the drive circuit of the first battery 6 as shown in FIG. , the normally open contact 14 interposed in the drive circuit of the second battery 7, on the contrary,
It is arranged on the moving direction side of the actuating piece 11 which is moved by the push operation of the switch operating knob 9.

In such a case, when using this razor, tilt the head section 2 forward and press the first switch operation knob 8 on the tilted side with the thumb of the gripping hand, and the contact point 13 will open as shown in Figure 7a. The closing motor 5 and the first battery 6 are connected and the motor 5 is driven. Next, the capacity of the first battery 6 decreases as it is used, but if you continue to use it without noticing this decrease in capacity, the motor 5 will not work even if you turn on the first switch operation knob 8. It does not drive and becomes unusable. Therefore, in this case, the second battery 7 will be used, but at this time, the head part 2 should be tilted backward and the thumb of the gripping hand should be placed on the rear surface 1b of the main body case 1. , if you push the second switch operation knob 9 on the rear surface 1b with your thumb, the contact 14 will open as shown in Fig. 7b.
A second battery 7 is connected to the motor 5 with the side closed, and the motor 5 is driven by the battery 7.

In addition, in FIG. 3, the second switch operation knob 9 is set so that it will not be pressed accidentally during normal operation.
A slide lock 15 is detachably installed at the bottom of the first switch operation knob 8, and when the slide lock 15 is engaged with the first switch operation knob 8, the second switch operation knob 9 is pressed. I can't do it,
The second switch operating knob 9 can only be pressed after the slide lock 15 is disengaged.

Incidentally, according to the switch operation mechanism shown in FIG. 3, even if both operation knobs 8 and 9 are pushed simultaneously with the slide lock 15 removed, both switches will not be turned on. .

In addition, contrary to the above embodiment, the first switch operation knob 8 may be arranged on the rear side of the main body case 1, and the second switch operation knob 9 may be arranged on the front side of the main body case 1. Further, the motor 5 may be replaced with an electromagnet. Furthermore, the electric shaver may be of a vibrating type or a rotary type as long as the head portion 2 having inner and outer cutters can be tilted in the front and back direction.

4 and 5 both show other modified embodiments of the locking means of the switch operating knob, in which the locking means of the switch operating knob is a slide locking tool 15 that can be operated by manual operation alone. While the knob 9 cannot be operated by push, in all of these modified embodiments, the first switch operating knob 8 and the second switch operating knob 9 are moved in conjunction with the tilting operation of the razor head 2.
This makes one of the two inoperable.

That is, in the modified embodiment shown in FIG. 4, slide locks 15, 15 are disposed above the first switch operation knob 8 and the second switch operation knob 9 in the main body case 1, and the slide locks 15, 15 are engaged with and disengaged from the respective knobs 8, 9. Each slide lock member 15 is equipped so as to be vertically movable, and each slide lock member 15 is always biased in the upward movement direction by each spring 16. Each slide lock tool 15
has a pressed portion 15a and a knob engaging/disengaging portion 15b at the upper and lower ends, and the pressed portion 15a is biased to protrude from the upper wall 1c of the main body case 1 by the spring 16. In this case, when the razor head 2 is tilted forward, the slide lock 15 on the first switch operating knob side is pressed against the pressed portion 15a by the head 2 and engages with the upper outer side of the first switch operating knob 8. Therefore, at this time, the first switch operation knob 8 can be pushed, but the second switch operation knob 9 cannot be pushed, and erroneous operation of the second switch operation knob 9 can be prevented. On the other hand, when the razor head 2 is tilted backward, the slide lock 15 on the second switch operation knob 9 moves to the second position.
In order to engage the upper outer side of the switch operation knob 9,
In this case, even if the second switch operation knob 9 can be operated, the first switch operation knob 8 cannot be operated.

In the modified embodiment shown in FIG. 5, a lock arm 17 is integrally formed extending downward from the razor head 2, and by tilting the razor head 2 back and forth,
The engaging and disengaging portion 17a attached to the lower end of the arm 17 forms recessed portions 18 and 19 on the left and right sides of the lower surface of the operating rod 10.
so that they are engaged and disengaged alternately. In such a case, when the razor head 2 is tilted forward, the engaging/disengaging portion 17a of the locking arm 17 will move into the recessed portion 1 on the right side.
9, the second switch operation knob 9 cannot be operated by push at this time, but the first switch operation knob 8 can be operated by push. The push operation movable amount of the first switch operating knob 8 is within the range until the right end in the right recessed part 19 comes into contact with the engaging/disengaging part 17a. Conversely,
When the razor head part 2 is tilted backward, the engaging/disengaging part 17a of the lock arm 17 moves into the recessed part 18 on the left side.
At this time, the second switch operation knob 9 can be pushed, but the first
The switch operation knob 8 cannot be operated by push button.

As explained above, according to the present invention, in addition to the first battery 6 that supplies electricity to the load 5 such as a motor, the electric shaver has the second battery 7 as a backup power source. Separately from the first switch operation knob 8 for opening and closing the energization circuit of the second battery 7, a second switch operation knob 9 for opening and closing the energization circuit for the load 5 of the second battery 7 is provided to connect the first battery 6 and the second battery 7. The drive operation can be performed separately using dedicated operation knobs 8 and 9, respectively. Therefore, the user
and the second battery 7 can be easily used,
This eliminates the erroneous operation of driving the second battery 7 when the first battery 6 should be driven, as in the case where the driving operation of the first battery 6 and the second battery 7 is performed using one shared operation knob. 2nd by
Accidental consumption of the battery 7 can be prevented and its backup power function can be fulfilled. In addition, since the driving operation of the second battery 7 is performed using the dedicated operation knob 9,
Compared to the common operation knob for the first battery 6 and the second battery 7, the frequency of use of both operation knobs 8 and 9 is reduced, which has the advantage that the durability of both operation knobs 8 and 9 can be improved accordingly.

In particular, in this invention, the first switch operation knob 8 and the second switch operation knob 9 are connected to the head portion 2.
Since they are arranged on different front surfaces 1a and rear surfaces 1b of the main body case 1 corresponding to the tilting directions of the two operating knobs 8 and 9, it is very easy to use the operating knobs 8 and 9 properly, and it is possible to prevent misidentification and confusion of their operations.
You can shave by holding down the first or second switch operation knob 8 or 9 on the side where the head part 2 is tilted with the thumb of the hand holding the main body case 1.
Extremely easy to use.

[Brief explanation of drawings]

FIG. 1 is a perspective view illustrating an electric shaver according to the present invention, FIG. 2 is a side view of the electric shaver,
FIG. 3 is an enlarged sectional view of the main part. FIG. 4 is an enlarged sectional view of a main part showing another embodiment of the electric shaver according to the present invention. FIG. 5 is an enlarged sectional view of a main part showing still another embodiment of the electric shaver according to the present invention. Figure 6 is an electrical circuit diagram, Figure 7 a and b
is an explanatory diagram showing an operating state. 1...Body case, 2...Head part, 3...Outer blade, 4...Inner blade, 5...Motor, 6...First battery, 7...Second battery, 8...First switch operation Knob, 9...Second switch operation knob.

Claims (1)

[Claims] 1. In an electric shaver in which a head part 2 having inner and outer cutters 4, 3 is provided on the upper part of a main body case 1 so as to be tiltable back and forth, a load 5 such as a motor which is a drive source for the inner cutter 4 is installed in the main body case 1. , each with a load of 5
A first switch operation knob 8 and a first switch operation knob 8 each have a built-in first battery 6 and a second battery 7 that serve as a power source for the first battery 6 and the second battery 7, and can independently open and close the energizing circuit for the load 5 of the first battery 6 and the second battery 7, respectively. An electric shaver characterized in that one of the second switch operation knobs 9 is attached to the front surface 1a side of the main body case 1 corresponding to the tilting direction of the head part 2, and the other is attached to the rear surface 1b side of the main body case 1.