JPH04167318A - Trigger switch construction - Google Patents

Abstract

PURPOSE:To enable lock and reset operation simply, by providing a stopper projection to lock a stop member and a pushing part which makes contact with an operation piece on the back face of a button of a lock operation, and energizing a lock operation button on one side of the opening part by means of a spring. CONSTITUTION:A forefinger 40 is hitched on a lock operation button 32, and a middle finger 41 is hitched on a trigger member 25. The finger 40 is moved to slide the button 32, resisting against a spring 36, in the direction of an arrow, and a stopper projection 33 is put on a stopper member 42 and also a pushing part 34 is brought in contact with an operation piece 23. When fingers 40 and 41 are drawn under this condition, the member 25 is operated resisting against a return spring 31. By this operation, the pushing part 34 presses the operation piece 23 and operates a switch body 21, and at the same time, the projection 33 slips on the stopper member 24 to be locked at a stopper hole 24a. Thus the member 25 is locked under its drawn condition. By drawing the button 32, the projection 33 is unlocked from the hole 24a and a drawing force for member 25 is canceled to return the member 25 to its original position by means of the spring force of the spring 31.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a trigger switch structure included in a power tool or the like.

(Prior Art) A conventional trigger switch structure of this type includes a case 1 and a cover 1a fitted to the case 1, as shown in FIGS. 5 to 7. Terminals 2 and 3 are arranged in a straight line in the direction of operation of the operation button, which will be described later.The terminal 2 is provided with a fulcrum portion 4, and the terminal 3 is attached with a fixed contact 5. The fulcrum portion 4 of the terminal 2 swingably supports a movable piece 6, and a movable contact 7 is provided at the end of the movable piece 6. Furthermore, a guide piece 8 is provided protruding from the end face of the case 1. A guide piece 9 is provided protruding from the end of the cover 1a. In addition, an operating shaft 10 is provided inside the cover 1a.
is inserted so as to be active, and an operation button (trigger) 11 is formed at the tip of this operation shaft 10. and,
The operating button 11 is formed with a guide portion 12.13,
A guide piece 8.9 is in sliding contact with the guide part 12.13. A return spring 1 is provided between the end surface of the operating shaft 10 and the ground portion of the cover 2.
4 is interposed. A slider insertion portion 15 is formed on the operation shaft 10, and an operation spring 1 is inserted into the slider insertion portion 15.
6 and the base of a slider 17 are inserted, and the slider 17 is urged toward the movable piece 6 by the operation spring 16, and its end is in N contact with the movable piece 6. Further, a locking mechanism 18 is provided on the cover 1a. This locking mechanism 18 is a cylindrical portion 18a that projects from the left side surface of the cover 1a! A reset button 19 is inserted into this cylindrical portion 18a, and a spring 19a is housed in the cylindrical portion 11118a. Further, a lock plate 20 is attached to the operating shaft 10, and this lock plate 20 is provided with a lock portion 20a.

In the state shown in FIG. 5, the slider 17 is in N contact with the end 6a of the movable piece 5, and the end 6a is brought into contact with the surface of the terminal 2.

From this state, by pulling the operation button 11 with your finger, the operation shaft 1o is moved against the return spring 14, and the slider 17 is slid on the sliding surface of the movable piece 6, thereby moving the slider 17. The movable piece 6 is positioned on the movable contact 7 side of the piece 6, and the movable piece 6 is swung about the fulcrum portion 4 to bring the movable contact 6 into contact with the fixed contact 5. In this state, by inserting the reset button 19 into the spring 19a and pushing it in, the tip of the reset button 19 is engaged with the lock portion 20a of the lock plate 20, and the movable contact 6 is brought into contact with the fixed contact 5. maintain the same state.

(Problem to be Solved by the Invention) However, in such conventional technology, since the locking mechanism 18 is located on one side (left side) of the operation button 11, the locking operation can be performed with the right hand, but the locking mechanism 18 can be operated with the left hand. There was a problem that it could not be operated and people with Gitchi J could not use it.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a convenient trigger switch structure that allows safety and ON locking to be performed with either the right or left hand. It's about doing.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a switch body attached to a mounting member and a trigger member that can be retracted against a return spring. An actuator, a locking member having a locking hole, and a stopper are provided on the trigger member side, an opening is formed in the trigger member, and a lock operation button is slidably provided in the opening. A locking protrusion that contacts the end of the locking member when the lock operation button is not activated and locks the locking member when the lock operation button is activated, and a pusher that contacts the actuator when the lock operation button is activated. The lock operation button is biased toward one end of the opening by a spring.

(Function) With this configuration, the index finger can be hooked on the lock operation button, the middle finger can be hooked on the trigger, and,
Even if you pull the trigger member in this state, the actuator will not operate and the switch body will not operate. Also, move your index finger to move the lock operation button against the spring, hit the locking protrusion against the stopper, and push it. by touching the actuator and pulling the index and middle fingers in this state,
The trigger member is actuated against the return spring to push in the actuator with the pushing portion to actuate the switch body, and the locking protrusion is locked in the locking hole to lock the trigger member in the retracted state.

Furthermore, by pulling the trigger member again, the locking protrusion is removed from the locking hole, and by releasing the pulling force, the trigger member can be returned to its original position by the spring force of the return spring.

example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a schematic configuration explanatory diagram of a trigger switch structure according to the present invention, and FIG. 2 is a view taken from the direction of arrow A in FIG.

As shown in FIG. 1, the trigger switch structure according to the present invention includes a switch body 21 and a trigger body 22 that are attached to a mounting plate 30 that is a mounting member. The actuator 23, the locking member 24, and the stop bar 42 located between these protrude, and the locking member 24 has a locking hole 24a formed therein as shown in FIG.

The trigger body 22 includes a trigger member 25,
This trigger member 25 has a pin 26 at one end thereof.
It is swingably attached to the mounting plate 30 by a.

The trigger member 25 has an opening 26 formed therein, a spring support portion 27 formed on the ground surface of the opening 26, and a guide portion 28 formed on the left and right edges of the opening 26. There is. Further, the trigger member 25 is provided with a spring receiving hole 25a, and the mounting plate 30 is provided with a spring receiving member 29, and a return spring is provided between the spring receiving hole 25a and the spring receiving member 29. 31 is an interposed one.

A lock operation button 32 is provided in the opening 26 so as to be slidable while being guided by the guide portion 28 .

This lock operation button 32 has a locking protrusion 33 on its back surface.
and a push part 34, and a non-slip 3 on the surface part.
5 is formed, and a spring receiver part 32a is formed at the other end of the lock operation button 32. A spring 36 is interposed between the spring receiver section 32a and the spring receiver section 27 of the trigger member 25.

Next, the operation will be explained.

In the state shown in FIG.
The locking protrusion 33 is brought into contact with the end of the locking member 24 of the switch body 21.

Therefore, the trigger member 25 cannot be pulled against the return spring 31, and the actuator 23 of the switch body 21
does not operate, and the switch body 21 does not turn ON.

Hook the index finger 40 on the lock operation button 32, and then
1 on the trigger member 25.

Then, by moving the index finger 40, the lock operation button 32 is moved in the direction of the arrow in FIG. .

In this state, by pulling the index finger 40 and middle finger 41, the trigger member 25 is actuated against the return spring 31. As a result of this operation, the pusher 34 pushes the actuator 23 to actuate the switch body 21, and the locking protrusion 33
slides on the locking member 24 and is locked in the locking hole 24a. For this reason, the trigger member 25 is locked in the retracted state.

Further, by pulling the lock operation button 32 as shown by the arrow in FIG. The trigger member 25 is returned to its original position.

(Effects of the Invention) As explained above, the present invention includes a switch main body attached to a mounting member and a trigger member that can be retracted against a return spring, and an actuator is provided on the trigger member side of the switch main body. A locking member having a locking hole and a stopper are provided, an opening is formed in the trigger member, a lock operation button is slidably provided in the opening, and a lock operation button is provided on the back side of the lock operation button. A locking protrusion that contacts the end of the locking member when the button is not activated and locks the locking member when the lock operation button is activated, and a push portion that contacts the actuator when the lock operation button is activated are provided. Since the button is biased toward one end of the opening by the spring, the index finger can be hooked on the lock operation button and the middle finger can be hooked on the trigger member, and even if the trigger member is pulled in this state, the actuator will not operate. The switch body does not operate, and when you move your index finger to move the lock operation button against the spring and hit the locking protrusion against the stopper,
By bringing the push part into contact with the actuator, and in this state, pulling the index and middle fingers, the trigger member is actuated against the return spring, and the push part pushes the actuator, actuating the switch body and locking it. The trigger member can be locked in the retracted state by locking the protrusion in the locking hole.

Further, by pulling the trigger member again, the locking protrusion is removed from the locking hole, and by releasing the pulling force, the trigger member can be returned to the original position 1 by the spring force of the return spring.

As described above, since the lock operation button is provided on the front surface of the trigger member and is operated with the index finger, the safety and ON lock can be conveniently performed with either the right or left hand.

[Brief explanation of drawings]

FIG. 1 is a schematic structural explanatory diagram of a trigger switch structure according to the present invention, FIG. 2 is a view taken from the direction of A in FIG. 1, and FIGS. 3 and 4 are diagrams showing the trigger switch structure according to the present invention. 5 is a longitudinal cross-sectional view of the conventional trigger member/ch structure, FIG. 6 is a cross-sectional view taken along line C-C in FIG. 5, and FIG.
The figure is a sectional view taken along the line CC in FIG. 5. 21... Switch body, 23... Operator, 24...
-Latching member, 24a...Latching hole, 25...Trigger member, 26...Opening, 30...Mounting member,
31...Return spring, 32...Lock operation button, 42...Stopper. Fig. 1 Fig. 2 Fig. 3 b Fig. 4rlA Fig. 6 Fig. 6 Fig. 7

Claims (1)

[Claims] The switch includes a switch body attached to a mounting member and a trigger member that can be retracted against a return spring, and an actuator, a locking member having a locking hole, and a stopper on the trigger member side of the switch body. an opening is formed in the trigger member, a lock operation button is slidably provided in the opening, and a lock button is provided on the back side of the lock operation button that contacts the end of the locking member when the lock operation button is not activated and locks the trigger member. A locking protrusion that locks on the locking member when the operation button is activated, and a push portion that comes into contact with the actuator when the lock operation button is activated,
A trigger switch structure characterized in that a lock operation button is biased toward one end of an opening by a spring.