JPS635791A - Electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 【Technical field】

The present invention relates to an electric shaver, and more particularly to an electric shaver equipped with a switch for varying the rotational speed of a motor.

[Background technology]

Some electric shavers that use batteries as a power source have a variable motor rotation speed in order to reduce battery consumption. As shown in Fig. 16, this means that battery B and motor
In addition to inserting a power switch SW and a resistor R in series between the At times, power is supplied to the motor M through a resistor R to keep the rotation speed of the motor M low, and when the load is heavy, a switch S is turned on to increase the rotation speed of the motor M. The figure in the figure is a charged monoyl. By the way, the conventional switch S was formed as shown in FIGS. 13 to 15. That is, 1! A source switch SW and a switch S are disposed, and the switch S is configured as a slide switch, and when the switch handle 3 is slid, the contact spring 30 provided in the switch handle 3 is moved inside the main body 1. A pair of contact plates 31 and 31 attached to the board 10 are short-circuited, and the switch handle 3 has click protrusions 39 and 39 attached to the body 1 that protrude from the inner surface of the main body 1. Boss 1
1, the position is maintained in both the on and off states of the switch S. For this reason, when turning on the -degree switch S and increasing the rotation speed of the motor M, I forgot to turn it back on. In some cases, the original role of Switch S, which was to suppress wear and tear, was wasted.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to provide an electric shaver that does not cause the user to forget to return the switch for changing the rotation speed of the motor. be.

[Disclosure of the invention]

Accordingly, the present invention provides an electric shaver equipped with a switch for changing the rotational speed of a motor for driving the inner blades and a power switch, characterized in that the switch is formed by an automatic return type switch. The rotation speed of the motor increases as the operation input is applied, and when the switch is released, the rotation speed of the motor automatically becomes low. To elaborate on the basis of MI
Figures J1 to 6 show one embodiment. On the front side of the main body 1 to which the outer cutter 40 is mounted via the outer cutter frame 4, there are controls for operating the power switch SW and changing the rotation speed of the motor M. A switch handle 2 is provided which also serves to operate the switch S for power supply, and an off switch handle 6 is provided for returning the power switch SW. A plate 5 is disposed between the inner surface of the main body 1 and a substrate 10 disposed within the main body 1, and is slidable vertically in the figure. Both the switch handle 2 and the off switch handle 6 are push button types, and are biased in the direction of protrusion from the main body 1 by return springs 22 and 60 arranged between them and the switch handle 2. The handle 2 is provided with a protrusion 21 as shown in FIGS. 4 and 5, and the off switch handle 6 is provided with a protrusion 62. The plate 5, which is slidable up and down, has a plurality of openings, and a return spring 50, which is disposed in one of the openings and locks both ends of the main body 1 and the plate 5, It is biased downward by a spring, and is provided with a locking protrusion 51 with an inclined surface on the front side on the edge of the opening provided at a position corresponding to the switch handle 2. The edge of the opening provided at the position corresponding to the off switch handle 6 is also provided with a locking protrusion 52 which is also an inclined surface on the front side, and furthermore, a shorting plate 21 is provided on the inner side of the lower end. It is fixed. A pair of contact springs 20° 20 are attached to the lower i portion of the substrate 10, and a contact spring 30 and a contact plate 31 are attached to the upper end and at a position corresponding to the protrusion 21 of the switch handle 2. It is something. The contact spring 20.20 is connected to a shorting plate 21 provided on the plate 5.
constitutes the contact part of the power switch SW, and the contact spring 30
The α plate 31 is connected to the motor M for driving the inner blade (not shown).
It constitutes the contact part of the switch S for changing the rotation speed. The circuit diagram is shown in figure PltJ3. Battery B and power switch S
W, resistor R1 and motor M are connected in series,
The middle part of Figure 0, in which a switch S is arranged in parallel with the resistor R, is a charging module for charging a battery B, which is a storage battery. Note that a diode may be provided in place of the resistor R. Figure 4 shows the off state of the power switch SW.
The plate 5 is lowered by the force of the return spring 50, and the sloped surface of the locking projection 51 is brought into contact with the sloped surface provided on the projection 21 of the switch handle 2. When the switch handle 2 is pushed in in this state, the plate 5 is pushed up by the protrusion 21 as shown in FIG. short circuit. That is, when the power switch SW is turned on, and when the switch handle 2 is pushed in and the plate 5 is moved upward, as shown in FIG. 6. Maintained by engagement,
At this time, since the contact spring 30 and the contact plate 31 remain separated, power is supplied to the motor M through the resistor R, and the rotation speed of the motor M is low. In order to increase the rotational speed of the motor M, the switch handle 2 that was operated to turn on the power switch SW may be pushed further. By this pushing, the protrusion 21 is moved as shown in FIG.
), press the contact spring 30 and attach it to the contact plate 3.
1, and when the switch S is turned on, power is supplied to the motor M while the resistor R is bypassed. This state is maintained only as long as the switch handle 2 is pushed in deeply, since the switch handle 2 will return to the state shown in FIG. 6(b) if the switch handle 2 is released. To turn off the power switch SW, the off switch handle 6 can be pushed in as shown in FIG. 6(d). The plate 5, in which the protrusion 62 of the off-switch handle 6 corresponds to the inclined surface on the front surface of the locking protrusion 52, moves upward as the off-switch handle 6 is pushed in, and engages the protrusion 21 on the switch handle 2 with the locking protrusion 51. In order to release the switch handle 2, the switch handle 2 is returned by the return spring 22, and when the hand is released from the switch handle 6, the off switch handle 6 and the plate 5 are released by the return springs 60 and 50, respectively.
In order to return to the state shown in FIG. 4, the power switch SW is turned off. Other embodiments are shown in FIGS. 7 to 412. In the uni, a switch handle 2 for a power switch SW, a switch handle 3 for a switch S for changing the rotation speed of the motor M, and a battery B are provided on the front of the main body 1. Switch handle 7 for switch a for switching between spare battery SB and power switch S
Off switch handles 6 for turning off W are arranged in a line, and return springs 22, 30 . It is biased in the direction of protruding from the main body 1 by TO and GO. Further, the switch handle 3 is arranged near the switch handle 2. A plate 5 is installed between the inner surface of the main body 1 and the substrate 10, and is slidable up and down, is urged downward by a return spring 50, and has a shorting plate 21 attached thereto, as in the above embodiment. ing. Furthermore, the switch handle 2 and the off switch handle 6 are provided with protrusions 21.62, respectively, and the plate 5 is provided with protrusions 21.6.
It is also the same as the above embodiment in that locking protrusions 51 and 52 that are in contact with 2 are provided. However, the contact spring 30 and the contact plate 31, which are the contact portions of the switch S, are arranged at the back of the switch handle 3. They differ in α. In addition, the switch SW for switching between battery B and spare battery SB
The contact portion at a is not shown. When the switch handle 2 is pushed in from the OFF state shown in FIG. 10, the plate 5 moves upward as shown in FIG. Then, the power switch SW is turned on, and this state is maintained by the engagement between the protrusion 21 on the switch handle 2 and the locking protrusion 51 on the plate 5, as shown in FIG. 11(b). To increase the rotation speed of motor M! Figure 511 (
The switch handle 3 can be pushed in as shown in e). Only while this pushing original is being done, the protrusion 33
The contact spring 30 and the contact plate 31 come into contact with each other, and the switch S is turned on, so that the rotation speed of the motor M is increased. Since this switch handle 3 is located next to the switch handle 2 for the power switch SW, it can be easily operated even while shaving. Then, when the off switch handle 6 is pushed in, the plate 5 moves upward to disengage the protrusion 21 and the locking protrusion 51, as shown in FIG. 11(d), so that the switch handle 2 returns to its original position. When the off switch handle 6 is released, the off switch handle 6 and the plate 5 return to their original positions, so the power switch SW is turned off.

【Effect of the invention】

As described above, in the present invention, since the switch for changing the rotation speed of the motor is of an automatic return type, there is no possibility of forgetting to return the switch, and the motor rotates only as long as necessary. Since the number is high, the presence of the rotational speed changeover switch becomes clear, and in a device that uses a battery as a power source, battery consumption can be surely reduced due to the presence of this switch.

[Brief explanation of the drawing]

Figure plIJ1 is a perspective view of an embodiment of the present invention, Figure 2 is an exploded perspective view of the same, Figure 3 is a circuit diagram of the same, Figure 4 is a cutaway side view of the same, Figure 5 is a perspective view of the same, and Figure 5 is a perspective view of the same. Figure 6 (-)
(b), (c), and (d) are cross-sectional views showing the same operation as above, FIG. 7 is a perspective view of another embodiment, FIG. 8 is an exploded illusion diagram of the same as above, FIG. Figure 10 is a broken side view of the same as above, Figures 11 (a), (b), (c), and (d) are sectional views showing the operation of the above, Figure 12 is a perspective view of the same, and Figure vJ13 is a perspective view of the conventional example. , FIG. 14 is a perspective view of the same switch handle as above;
FIG. 15 is a sectional view of the same as above, and FIG. 16 is a circuit diagram of the same as above, where 1 is the main body, 2°3 is a switch handle, SW is a power switch, S is a switch for changing the motor rotation speed,
M indicates a motor. Agent Patent Attorney Ishi 1) Ai Figure 7 Figure 1 Figure 9 (0) (b) Figure 11

Claims (4)

[Claims] (1) In an electric shaver equipped with a switch for changing the rotation speed of the motor for driving the inner blades and a power switch,
An electric shaver characterized in that the above switch is an automatic return type switch. (2) The electric shaver according to claim 1, wherein the switch is connected in parallel with a resistor connected in series with the motor to bypass the resistor. (3) The electric shaver according to claim 1, wherein the switch is turned on and off by a switch handle for a power switch. (4) The electric shaver according to claim 1, wherein the switch handle of the switch is installed near the switch handle of the power switch.