JPH0630699B2 - Electric razor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electric razor provided with a pair of touch switches for turning a switch on and off.

(Background Art) Conventionally, there is a touch switch which can be turned on / off by a touch to simplify the on / off movement of the switch in an electric razor.

Then, usually one touch switch is provided,
If this touch switch is small, in addition to the operation of holding the electric razor by hand when using the electric razor, it is necessary to touch the touch switch to turn the switch on and off, and it is possible to prevent breakdown due to wear of the switch contact. There was a drawback in that the switch was left unattended and wasted without energy, and the battery was over-discharged.

In addition, if the touch switch is a large switch and can be touched without fail, the above-mentioned drawbacks can be eliminated, but conversely, if you hold it, it will be dangerous because it will be turned on. There was a drawback that

(Object of the Invention) The present invention has been proposed in view of the above points, and an object of the present invention is to provide a pair of large and small touch switches so as to be turned on / off by an AND signal of both, and to turn on as in the conventional case. -The purpose is to provide an electric razor that does not waste energy and over-discharges the battery by leaving it on and leaving it turned on.

(Disclosure of the Invention) FIGS. 1 to 3 show an embodiment of the present invention.
In the electric razor of the present invention, a small first touch switch electrode plate 3 (see FIG. 1 (a)) is provided on one end side near the outer blade frame 2 on the front side, which is one side of the body 1. A large second electrode plate 4 of the touch switch is provided so that the main body 1 can be brought into contact with the main plate 1 at the time of use, substantially at the center of the other side (see FIG. 1B). In the above, the "front" generally means that the thumb is located at the time of use, and the "back" means the side where the remaining four fingers are located. Further, the smaller first touch switch is a known switch with a click so that the touch is given.

FIG. 2 shows an example of a circuit configuration used in the present invention. Reference numeral 5 is a first touch detection block that outputs a high level when a human body touches it. The electrode plate 3 of this touch switch is provided on the front side of the electric razor body 1. It is the one of the smaller touch switch. The front switch signal output from the touch detection block 5 is added to a first circuit including a flip-flop 6 which is a holding circuit for continuously outputting a high level or a low level in response to a signal which has become an instantaneous high level. The output of the flip-flop 6 is applied to one input terminal of the AND circuit 7.

Further, 8 is a second touch detection block, and this electrode plate 4 is that of the larger touch switch provided on the back side of the electric razor body 1, and the back switch signal which is its output has a high level waveform. It is added to a second circuit including a comparator 9 for shaping, the output of the comparator 9 is connected to the other input terminal of the AND circuit 7, and turns off when the electric razor is released, but next has. The flip-flop 6 is connected to the input end of the flip-flop 6 through an inverter 10 for setting the output of the flip-flop 6 to a low level and a one-shot circuit 11 so that the flip-flop 6 does not turn on. Further, the output terminal of the AND circuit 7 is connected to an electronic switch 12 including a switching transistor which is turned on / off by its output, and when the electronic switch 12 is turned on, a drive motor M for driving the movable blade is rotated. Is configured. In addition, B is a battery.

Next, the circuit operation will be described with reference to FIG. Now, when using the electric razor to hold the main body 1, when the back plate 4, that is, the larger touch switch is touched, the output of the touch detection block 8 becomes high level and the output of the comparator 9 also becomes high level. Since the electrode plate 3 on the front side is not touched, the output of the flip-flop 6 is at the low level, the output of the AND circuit 7 is at the low level, and the electronic switch 12 is in the off state. Then, when the front side electrode plate 3 is momentarily touched as it is, the output of the touch detection block 5 becomes an instantaneous high level, the output of the flip-flop 6 becomes a high level, the output of the AND circuit 7 becomes a high level, and the electronic switch 12 is turned on. . When touching the front plate 3 again while it is on, the touch detection block 5
Outputs an instantaneous high level, the output of the flip-flop 6 becomes a low level, the output of the AND circuit 7 becomes a low level, and the electronic switch 12 is turned off.

Next, when the main body 1 of the electric razor is released in the ON state, the electrode plate 4 on the back side is no longer touched, so the output of the touch detection block 8 becomes low level, the output of the comparator 9 becomes low level, and the output of the AND circuit 7 Becomes low level, and the electronic switch 12 is turned off. At this time, the output of the comparator 9 is connected to the input of the flip-flop 6 through the inverter 10 and the one-shot circuit 11 so that the output of the flip-flop 6 becomes low level, and then the electronic switch 12 is turned on even if the electric razor body 1 is held. I try not to.

4 (a) and 4 (b) show another embodiment of the present invention. In this embodiment, the protective cap 13 is attached to the blade head of the electric razor body 1, and the protective cap 13 is attached to the protective cap 13. This is characterized in that a plate-shaped switch protection portion 13a is provided so as to cover the electrode plate 3 of the first touch switch on the front side and prevent malfunction due to touching by mistake. Therefore, if it is covered with the protective cap 13 even if it is carried, it has a kind of switch lock function and does not touch the electrode plate 3.

As described above, according to the present invention, in the electric razor that is turned on / off by the touch switch, the electric razor has a small first touch switch on the front side of the electric razor body and a large second touch switch. Is provided on the back side and is connected to the first touch switch, and when the first touch switch is operated, a holding circuit that holds a signal until it is operated again, and an output of the holding circuit and the second touch switch are It is equipped with an AND circuit that is added and an electronic switch that turns the drive motor on and off by the output of this AND circuit.A pair of large and small touch switches hold the electric razor body and touch the small switch to turn it on. The conventional merit of turning on and off, and the function of turning off by touching when turning off, Even if the razor body is released, it will automatically turn off, so there is no need to put the switch in and leave it without wasting energy or over discharging the battery.

In addition, by using a switch with a click, it is a touch switch, but it has a feeling that a switch is inserted, which is convenient.

Further, since the electric razor body does not turn on by simply holding it, it is safe for a child to touch without turning it on when carrying it, and it is possible to prevent waste of energy.

Also, the smaller switch can be easily locked by covering it with a protective cap.

And so on.

[Brief description of drawings]

FIG. 1 (a) is a front view of the electric razor of the present invention, (b) is a rear view, FIG. 2 is an example of a circuit used for the same, FIG. 3 is a time chart of each part, FIG. 4 (a), (B) is another embodiment of the present invention. 3, 4 ... Electrode plate, 5, 8 ... Touch detection block, 6 ... Flip-flop, 7 ... AND circuit, 9 ... Comparator, 10
… Inverter, 11… One-shot circuit, 12… Electronic switch, 13… Protective cap, 13a… Switch protector.

Claims (3)

[Claims] 1. An electric razor that is turned on / off by a touch switch, wherein the electric razor has a small first
The touch switch of the above is provided on the front side of the electric razor body, the large second touch switch is provided on the back side, and the signal is connected to the first touch switch, and when the first touch switch is operated, a signal is transmitted until it is operated again. An electric razor, comprising: a holding circuit for holding, an AND circuit to which outputs of the holding circuit and the second touch switch are added, and an electronic switch for turning on / off the driving motor by the output of the AND circuit. . 2. The electric razor according to claim 1, wherein the first touch switch is a clickable switch. 3. The electric razor according to claim 1, wherein the first touch switch is covered with a blade protection cap.