JPH03238722A - Battery-operated electric equipment - Google Patents

Abstract

PURPOSE:To present any accidental movement of an equipment and forgetting to turn off the power switch by installing an energizing means for energizing a switch handle toward the OFF position side, a lock means for locking the switch handle in the ON position and a releasing means for releasing the lock set by the lock means incidentally to removal of a battery-operated power supply. CONSTITUTION:A power switch comprises a switch handle 31, an energizing means 34 for energizing this switch handle 31 to the OFF position side, a lock means 32 for locking the switch handle 31 in the ON position and unlocking means 35-37 for releasing the lock made by the lock means 32 incidentally to the removal of a battery power supply 2. That is, when the battery power supply 2 is removed, even if the switch handle 31 is in the ON position and also the ON state is held by the lock means 32, the lock made by the lock means 32 is automatically released, causing the switch handle 31 to return to the OFF position by spring energization and then, the power supply switch is always turned off when the battery power supply 2 is mounted. Then, any accidental start of movement can not take place so that safety can be secured.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to battery-powered electrical equipment that uses batteries as a power source.

[Conventional technology]

BACKGROUND ART Some battery-powered electrical devices include a switch handle that is biased toward the off side as a power switch, and a locking means for holding the switch handle in the on state. - Examples are shown below in Figure 5. This is a battery-powered lawn mower, and is composed of a head section 1, a power supply section 2, a grip section 3, and a guard section 4. The head part l has a built-in motor 10 in its upper part and a rotary blade 11 arranged on the lower surface side, and is fixed to a pinion 12 attached to the output shaft of the motor 10 and a mounting shaft 13 of the rotary blade 11. By meshing with the gear 14, the rotation of the motor 10 is transmitted to the rotary blade 11. To attach the rotary blade 11 to the mounting shaft 13, attach the screw 1 to the mounting shaft 13.
The presser plate 16 fixed by the rotary blade 11
This is accomplished by pressing the sleeve 15 over the mounting shaft 13. An upper cover 5 is disposed above the circumference of the rotary blade 11, and a lower cover 6 is disposed below it. In the figure, 60 is a lower cover mounting screw. One end of a grip section 3 and a guard section 4 are connected to the upper and lower side surfaces of the head section 1, respectively, and the upper surface of the grip section 3 has a sliding switch handle 31 and a lock button 32 as a locking means. is arranged, and a switch body 33 is arranged inside the grip part 3. The power supply unit 2 is configured as a rechargeable battery pack, and the grip unit 3
and is connected to the other end side of the guard portion 4. The switch handle 31 here includes a through hole 31c, a pressing projection 31b, and a locking projection 3, as shown in FIG.
1a, and is attached to the grip portion 3 in a state where it is biased toward the off side by a spring 34, as shown in FIG. Further, the lock button 32 located in the through hole 31c of the switch handle 31 has an engaging portion 32a with which the locking protrusion 3La engages, and is moved upward in the figure by a spring 35, that is, engaged with the locking protrusion 31a. The portion 32a is biased in the engaging direction. FIG. 7(a) shows the off state, in which the lock button 32 prevents the switch handle 31 from sliding. Then, as shown in FIG.
When the switch handle 31 is slid while disengaging from the switch body 33, the push button 33a of the switch body 33 is pressed by the pressing protrusion 31b to turn it on. Also, if you release your finger in this state, the lock button 32 will be released by the spring 35.
The engaging portion 32 is returned to the original position by the locking protrusion 31a.
a, and as a result, the switch handle 31 is held in the on position. To return to the off position, press the switch handle 3 with its locking protrusion 3.
1a and the engaging portion 32a of the lock button 32, and is forcibly pulled back, but the lock button 32 is pressed again to release the spring 3.
4 to return the switch handle 31 to its original position.

[Problem to be solved by the invention]

By the way, when such battery-powered electrical equipment has stopped due to a malfunction or overload, and the cause has been removed, it is necessary to remove the power supply section 2, which is a battery power source, in order to prevent it from starting up the moment the cause is removed. is common. However, power supply section 2
Even if the cause of the failure or overload is removed by removing the , it will start moving as soon as the power supply section 2 is attached. A similar situation occurs when the power supply unit 2 is replaced due to a dead battery. Of course, if the power switch had been turned off, this situation would not have occurred, but people often forget to turn off the power switch, and when the electrical equipment is a cutting device such as a lawn mower or electric saw, A sudden movement like this is extremely dangerous. The present invention has been made in view of these points, and its purpose is to provide a device having a locking means for locking the power switch in the on state, so that it will not move accidentally and be safe. There are some battery operated electrical appliances available.

[Means to solve the problem]

Accordingly, the present invention is a battery-powered electric device that includes a detachable battery power source and a power switch that turns on and off the connection between the battery power source and a load, and the power switch includes a switch handle and a switch handle that turns the switch handle off and on. The switch handle is mainly characterized by comprising a biasing means for biasing the switch handle toward the on position, a locking means for locking the switch handle in the on position, and a release means for releasing the lock by the locking means when the battery power supply is removed. The second feature is that the release means has one end protruding from the mounting portion of the battery power source and is a moving body that moves as the battery power source is attached or removed.The release means is connected to the battery power source when the battery power source is attached. The third feature is that it is an electromagnetic actuator. [Function] According to the present invention, if the battery power source is removed, even if the switch handle is in the on position and the locking means maintains the on state, the locking by the locking means is automatically released. The switch handle is spring-biased to return to the off position, and the next time a battery power source is attached, the power switch is always turned off. [Example] The present invention will be described in detail below based on an example of a battery-powered lawn mower shown in the drawings. Note that the lawn mower itself is the same as the conventional example, so a description thereof will be omitted. Now, the power switch in this lawn mower is composed of a switch handle 31, a lock button 32, and a switch body 33, which have the same structure as the conventional example, and the switch handle 31 is biased toward the OFF side by a spring 34. The lock button 32 is biased by a spring 35 in a direction in which its engaging portion 32a engages with the locking protrusion 31a of the switch handle 31. The other end rests on a spring receiver 37 which is rotatably supported here by a shaft 38. Further, a slider 36 is disposed between the spring receiver 37 and the power supply part 2 which is a battery power supply, and when the power supply part 2 is installed, the power supply Although the slider 36 pressed by the part 2 and the spring receiver 37 are pushed, and the spring 35 disposed between the spring receiver 37 and the lock button 32 is in a state of urging the lock button 32,
When the power supply section 2 is removed, as shown in Fig. 2(b),
The spring receiver 37 biased by the spring 35 rotates while retracting the slider 36, and the spring force of the spring 35 is applied to the lock button 32.
Avoid getting infected. In other words, if the power supply unit 2 is removed while the switch handle 31 is held in the on state by the lock button 32, the spring force applied to the lock button 32 is lost, so the switch handle 31 will not lock. The lock button 32 is pushed down by the slope of the protrusion 31a and returned to the off position 1 by the force of the spring 34. Despite the presence of the lock button 32, the power switch is always turned off when the power supply unit 2 is removed. Another embodiment is shown in FIGS. 3 and 4, in which a solenoid 3 is connected to the power source 2 through a battery contact terminal 21.
9 is provided, and a movable element 39a operated by this solenoid 39 supports the spring receiver 37. When the power supply unit 2 is installed, the solenoid 39 operates and supports the spring receiver 37 by the movable element 39a, but the tm
When the part 2 is removed, the solenoid 39 is turned off, and the spring receiver 37 is rotated by the biasing force of the spring 35, thereby eliminating the spring biasing force against the lock button 32.

【Effect of the invention】

As described above, in the present invention, if the battery power supply is removed, even if the switch handle is in the ON position 1 and the ON state is maintained by the locking means, the locking by the locking means is automatically released. The switch handle is spring-biased and returns to the off position, so the power switch is always turned off the next time a battery power source is installed, so it will never move unexpectedly and there is no risk of forgetting to turn off the power switch. It is something that does not invite.

[Brief explanation of drawings]

Figure 1 is a sectional view of one embodiment of the present invention, Figures 2 (a) and (b)
3(a) and 3(b) are sectional views showing the operation of another embodiment, FIG. 4 is the same circuit diagram, and FIG. 5 is a sectional view of the conventional example. Figure 6 is a perspective view of the switch handle and lock button same as above, and Figures 7 (a) to (d) are sectional views showing the operation of the same as above, 2 is a power supply section, 31 is a switch handle, and 32 is a lock button. , 33 is the switch body, 3
4.35 is a spring, 36 is a slider, and 37 is a spring receiver.

Claims (3)

[Claims] (1) A battery-powered electrical device that includes a detachable battery power source and a power switch that turns on and off the connection between the battery power source and a load, the power switch having a switch handle and a switch handle that is moved to the OFF position. 1. A battery-powered electric device comprising: a biasing means for biasing the switch handle; a locking means for locking the switch handle in the on position; and a release means for releasing the lock by the locking means when the battery power supply is removed. (2) The battery-powered electric device according to claim 1, wherein the release means is a movable body that has one end protruding from the mounting portion of the battery power source and moves as the battery power source is attached or detached. (3) The battery-powered electric device according to claim 1, wherein the release means is an electromagnetic actuator that is connected to the battery power source when the battery power source is attached.