JPS59169083A - Small electric appliance - Google Patents

Abstract

PURPOSE:To prevent malfunction and make easy and simple to handle by making a main battery and electric load ON/OFF by reciprocating operation of a knob and moreover by operating the knob in a direction which crosses to usual ON/OFF direction. CONSTITUTION:A switch knob 8 is movable in upper, lower, right, and left direction in a limited range in an L-shaped guide groove 11 formed in the front of a main case 1. A foot 8a projected from the inner side of the knob 8 is inserted into a through hole 12 of the case and a plate 13 is fixed to the tip of the foot 8a. A pin 26 is installed in the inner side of the plate 13. A fork-shaped elastic lock piece 27 which contacts the pin 26 and generates elastic retreation displacement, when the pin moves in a right direction, is installed in a base 17. Accidental move of the knob 8 to right direction is prevented by elastic contact of the pin 26 and lock piece 27.

Description

[Detailed Description of the Invention] This invention is equipped with two main batteries for normal use, a spare battery for emergency use when the output of the main battery is insufficient, and a switch means for selectively using these batteries. Concerning the improvement of small electric appliances such as electric shavers and handy lights.

Conventionally, an electric shaver, which is an example of a small electrical device with such a function (1), uses a rechargeable battery as the main battery and a dry battery as a spare battery.
As shown in Fig. 8, under normal conditions, the sliding switch knob 8 provided on the front of the main body case 1 is reciprocated up and down to connect and disconnect the inner blade drive motor, which is an electrical load, and the main battery, so that the main battery outputs output. In case of emergency use when the battery runs out and there is no time to wait for the battery to be charged, there is a well-known battery that can be connected to the motor by sliding the switch knob 8 further downward from the off position.

However, with this switching means using the sliding switch knob 8, even during normal use when the main battery has sufficient output, there is no possibility that the switch knob 8 may be turned off with too much force and turned to the on position of the spare battery. Yes, repeating this over and over again wastes the power of the spare battery, and in case of emergency use when there is no time to wait for the main battery to charge, the output of the spare battery will decrease, which is useless. There was this inconvenience.

In addition, to solve this problem, there is a device that incorporates a locking means that prevents the switch knob (2) from being operated when the spare battery is in the on position during normal operation (for example,
Publication No. 9).

However, with this, the structure becomes complicated due to the addition of a new locking means, and when using a spare battery, it is necessary to separately operate a lock release tool before operating the switch knob, which tends to make handling cumbersome.

This invention focuses on this fact, and aims to provide a small electric device that can easily switch between the main battery and the spare battery with a single switch knob, and can be used correctly during normal operation without accidentally turning on the spare battery. That is.

The details will be explained below based on the drawings.

FIG. 1 shows an electric shaver as an example of a small electric device according to the present invention, in which a main body case 1 includes an electric motor 2. Main battery powered by rechargeable battery 3.
9 body case 1 with built-in spare batteries 4 and dry batteries
An inner cutter (not shown) is attached to the upper part of the holder 7, and an inner cutter (not shown) is mounted on the upper part of the motor output shaft 5 and is vibrated back and forth to the left and right by a well-known drive means (3). It is removably fitted and fixed.

A sliding switch knob 8 for turning on and off the motor 2 is provided on the front surface of the main body case 1, and a charging plug 10 for the main battery 3 is provided on the lower side of the main body case 1 so as to be freely removable.

The switch knob 8 is movable vertically and horizontally within a certain range within a guide recess 11 formed in the front face of the main body case 1 and has a letter shape when viewed from the front. 1, and a plastic switch plate 13 is fixed to the tip of the leg 8a by caulking.

Three movable contacts 14, 15, and 16 made of conductive metal plates are arranged in a staggered manner on this switch plate 13, and the caulking is fixed. On the other hand, a plastic switch base plate 17 facing parallel to the switch plate 13 is fixed inside the main body case 1.
7 has three (4) pairs of fixed contacts 18a-18b, 19a-19b.

and 20a-20b are installed. Each vehicle contact 18a,
...20b are arranged in a pattern as shown in FIG. Main battery 3. Auxiliary battery 4 and charging circuit 2
Connected to 1.

In such a case, when the switch knob 8 is located at the lower left corner of the L-shape of the guide recess 11, the main and spare batteries 3 and 4 are in the off position, and when the switch knob 8 is slid upward. Fixed contacts 18a-18b and 19a-19b
are connected by movable contacts 14 and 16, respectively, and the motor 2 is driven by the main battery 3. When sliding knob 8 to the right, fixed contacts 19a-19b and 20a-20
b are connected by movable contacts 15 and 16, respectively,
In this case, the motor 2 is driven by the spare battery 4.

Therefore, during normal use, the motor 2 is turned on and off by reciprocating the switch knob 8 up and down, and only when the output of the main battery 3 becomes insufficient, the motor 2 is turned on and off by reciprocating the knob 8 left and right.

(5) In addition, a pair of upper and lower protrusions 21 are provided on the bottom surface of the guide recess 11.
22 and a protrusion 23, and a pair of upper and lower protrusions 24 and 25 are provided on the inner surface of the switch knob 8 to engage with them and stably hold the switch knob 8 in the OFF position and the main battery ON position, respectively. It is provided. These ridges 2
1, 22, 24, and 25 also serve as guides when sliding the switch knob 8 left and right.

A pin 26 is provided protruding from the inner surface of the switch plate 13, and a bifurcated elastic locking piece contacts the pin 26 and elastically moves backward when the pin 26 moves to the right together with the switch plate 13. 27 is integrally connected to the switch base 17.

In such a case, the elastic contact between the pin 26 and the locking piece 27 prevents the switch knob 8 from unexpectedly moving to the right. Further, the resistance to the rightward movement of the switch knob 8 due to the locking piece 27 is set to be slightly larger than the upward movement resistance of the switch knob 8, so that the switch knob 8 can be moved upward more easily than to the right. do.

(6) Fig. 6 shows another embodiment of the present invention, in which a switch knob 8 that connects the main battery 3 and the motor 2 by sliding it up and down.
The spare battery 4 is turned on by first moving it slightly to the right from the off position and then sliding it downward.

FIG. 7 shows yet another embodiment of the present invention.

The spare battery 4 is turned on by sliding the knob 8 diagonally downward from the off position.

In addition, in each of the above embodiments, a rechargeable battery is used as the main battery 3.
Although dry batteries were used as the spare batteries 4, it is also possible to use dry batteries as the main battery 3 and rechargeable batteries as the spare battery 4, or use dry batteries or rechargeable batteries as both the main and spare batteries 3 and 4. may be used.

As explained above, according to the present invention, the switch knob 8
The main battery 3 and the electric load 2 are connected to each other by reciprocating in a certain direction.

The same switch knob 8 is operated in a direction crossing the normal on/off operation direction to connect and disconnect the spare battery 4 and the electrical load, so one switch knob 8 can be used to switch and select between the main battery (7) 3 and the spare battery 4. As well as being able to.

Under normal circumstances, it is possible to prevent erroneous operation of accidentally switching the knob 8 to the spare battery on position. Furthermore, switching the spare battery 4 to the on position does not involve operating a separate lock release tool or the like.

It has a simple structure, can be implemented at low cost, and is easy to handle.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view of an electric shaver showing an embodiment of the present invention, Fig. 2 is an enlarged front view of a switch operating section, Fig. 3 is a longitudinal fTo111 view of the switch operating section, and Fig. 4 is a second The cross-sectional view taken along the line A--A in the figure, and FIG. 5 is an electric circuit configuration diagram. FIG. 6 is a front view of an electric shaver showing another embodiment of the present invention. FIG. 7 is a front view of an electric shaver showing still another embodiment of the present invention. FIG. 8 is a front view of a conventional electric shaver. 2... Electric load, 3... Main battery. 4...Spare battery, 8...Switch knob. (8)

Claims (1)

[Claims] +11 One electrical load 2 and each electrical load 2
It is equipped with a main battery 3 and a spare battery 4 that serve as power sources for the power supply, and one switch knob 8 that connects and disconnects the main battery 3 and the electrical load 2 by operating the power in a certain direction. The switch knob 8 is also capable of reciprocating movement in a direction that intersects with the above-described fixed operating direction. A small electric device characterized in that the connection between the spare battery 4 and the electric load 2 can be connected or disconnected by the reciprocating operation in the cross directions.