JP3043518U - Trigger switch device - Google Patents

Abstract

(57) [Abstract] [Problem] It was easy for dust to enter the inside of the trigger switch body. SOLUTION: A slide member 21 as a dustproof member that covers an opening 10b is provided on an upper surface of a trigger switch main body 10, and a pressing member 22 that presses the other end of a forward / reverse switching lever 13 is provided. . Therefore, it is possible to prevent dust from entering the trigger switch body 10. The slide member 21 slides on the upper surface of the trigger switch main body 10 together with the forward / reverse switching lever 13 to wipe the upper surface of the trigger switch main body 10 to wipe out dust adhering to the upper surface of the trigger switch main body 10.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a trigger switch device used in, for example, an electric power tool.

[0002]

[Prior art]

 This type of trigger switch device is attached to an electric power tool, and controls the operation of a motor provided in the electric power tool according to the operation of a trigger operator. As this trigger switch device, one having a switch capable of controlling the rotation direction of the motor (hereinafter, referred to as a forward / reverse switching switch) has been developed.

3 and 4 show a conventional trigger switch device having a forward / reverse changeover switch. In FIGS. 3 and 4, a trigger operator 11 is provided on a side surface of the trigger switch body 10 so as to be freely inserted and removed. Inside the trigger switch body 10, there is provided, for example, a seesaw-type switch 12 that supplies power to the motor in response to the operation of the trigger operator 11. A forward / reverse switching lever 13 is rotatably provided on the upper portion of the trigger switch body 10. The center of the forward / reverse switching lever 13 is supported by the shaft 10a, one end of which is located above the trigger operating element 11 and the other end of which is located above the trigger switch body 10.

Inside the trigger switch body 10, above the switch 12, a forward / reverse changeover switch 14 for switching the polarity of the power source supplied to the switch 12 is provided. The forward / reverse changeover switch 14 is a so-called double-pole double-throw switch, which is arranged around the rotor 14a, a pair of movable contacts 14b, 14c provided on the rotor 14a, the rotor 14a, and the movable contact 14b. It is composed of two pairs of fixed contacts 14d and 14e (only one of which is shown in FIG. 4) capable of contacting 14c.

A protrusion 14f is provided on the upper surface of the rotor 14a so as to be eccentric from the center of rotation. As shown in FIG. 3, the tip of the protrusion 14f is projected to the outside of the trigger switch body 10 through an arc-shaped opening 10a provided on the upper surface of the trigger switch body 10. The front end of the protrusion 14f protruding to the outside of the trigger switch body 10 is connected to the engaging portion 13a which is formed with a notch in the center of rotation of the forward / reverse switching lever 13 and the other end. . Therefore, when the forward / reverse changeover lever 13 is operated, the rotor 14a is rotated accordingly, and the switch state of the forward / reverse changeover switch 14 is changed over.

An elastic portion 13b is formed at the other end of the forward / reverse switching lever 13, and the elastic portion 13a is pressed against a moderation portion 10c provided on the upper surface of the trigger switch body 10. . The moderation portion 10c has a convex portion 10d that protrudes in the center of the lateral direction of the upper surface of the trigger switch body 10, and the elastic portion 13b is convex when the forward / reverse switching lever 13 is rotated. Moderation occurs when overcoming the portion 10d.

The lock button 15 locks and holds the retracted state when the trigger operator 11 is retracted into the trigger switch body 10. When the trigger operator 11 in this retracted state is further retracted, the lock is released and the trigger operator 11 is returned to the position shown in FIGS. 3 and 4.

[0008]

[Problems to be solved by the device]

 By the way, in the trigger switch device having the above-described structure, a gap is apt to be formed between the other end of the forward / reverse switching lever 13 and the upper surface of the trigger switch body 10, and the trigger is provided from the opening 10b provided on the upper surface of the trigger switch body 10. Dust easily entered the inside of the switch body 10. The cause of the gap between the other end of the forward / reverse switching lever 13 and the upper surface of the trigger switch body 10 is that the forward / reverse switching lever 13 is rotatably held on the trigger switch body 10 and the forward / reverse direction. It is conceivable that the switching lever 13 is loosened from the fitting hole 13c into which the shaft 10a is fitted or that the forward / reverse switching lever 13 is warped.

Therefore, it is conceivable to attach a dustproof packing to the opening 10b. However, in the usage environment of the trigger switch device, extremely fine powdery dust is generated, and such dust enters the inside of the trigger switch main body 10 only by covering the opening 10b with packing. Resulting in.

Even when the trigger switch body 10 does not enter the inside thereof, even if the trigger switch device is left for a long time, the extremely fine powdery dust adhered to the upper surface of the trigger switch body 10 may cause an environmental atmosphere. It absorbs the water in it and solidifies. When dust that has entered between the other end of the forward / reverse switching lever 13 and the upper surface of the trigger switch body 10 is solidified like this, the other end of the forward / reverse switching lever 13 and the trigger switch body 10 are The gap between the upper surface and the upper surface was widened, making it easier for dust to enter and degrading the performance of the packing.

The present invention has been made to solve the above problems, and an object thereof is to prevent dust from entering the inside of a trigger switch body and to attach dust to the upper surface of the trigger switch body. The present invention is intended to provide a trigger switch device capable of preventing the above and improving the dustproof effect.

[0012]

[Means for Solving the Problems]

 A switch body in which the trigger operator of the present invention is provided so as to be able to move in and out, a first switch provided in the switch body, and a switch state is set to be switched according to an operation of the trigger operator; A second switch provided in the switch body and having a rotatable rotor for switching the polarity of the power supplied to the first switch; and a second switch provided in the switch body and provided in the rotor. The opening for exposing the first engaging portion and the central portion in the longitudinal direction are rotatably attached to the surface provided with the opening outside the switch body, and one end in the longitudinal direction is an operating portion. And a second engaging portion that is connected to the first engaging portion exposed from the opening between the central portion and the other end in the longitudinal direction. Reverse switching lever and the forward / reverse switching lever A dustproof member provided between the faces of the switch body, having a size that slides on the face together with the forward / reverse switching lever and closes the opening at any of the slide positions, and the switch. The pressing member is provided on the surface of the main body and presses the other end of the forward / reverse switching lever in the surface direction.

Since the other end of the normal / reverse switching lever is pressed by the pressing member, it is possible to prevent a gap from being formed between the normal / reverse switching lever and the surface of the switch body on which the opening is provided. Further, since the opening is always closed by the dustproof member pressed by the forward / reverse switching lever, it is possible to prevent dust from entering the switch body through the opening.

Moreover, since the dustproof member slides on the surface of the switch body provided with the opening according to the operation of the forward / reverse switching lever and wipes this surface, dust adheres to this surface and solidifies. Can be prevented.

[0015]

[Embodiment of the invention]

 An embodiment of the present invention will be described below with reference to the drawings. The same parts as those in FIGS. 3 and 4 are designated by the same reference numerals, and only different parts will be described. In FIGS. 1 and 2, on the upper surface of the trigger switch body 10, there is provided a slide member 21 that covers the opening 10b and that is made of, for example, a circular and elastic resin material as a dustproof member. The slide member 21 is located between the upper surface of the trigger switch body 10 and the other end of the forward / reverse switching lever 13, is housed in a recess 13d formed in the other end of the forward / reverse switching lever 13, It is fitted to the protrusion 14f of 14a. Therefore, when the forward / reverse switching lever 13 is rotated, the slide member 21 slides on the upper surface of the trigger switch body 10 together with the other end of the forward / reverse switching lever 13 and the rotor 14a. The diameter of the slide member 21 is large enough to close the opening 10b at any position during the sliding operation.

In the upper part of the moderation portion 10 c, in the vicinity of the other end of the forward / reverse switching lever 13, the other end (elastic portion 13 b) of the forward / reverse switching lever 13 is arranged in the upper surface direction of the trigger switch body 10. A pressing member 22 capable of pressing is provided. The pressing member 22 has a length and a width that enable the forward / reverse switching lever 13 to press the other end of the forward / reverse switching lever 13 at any position within the rotation range indicated by arrows A and B in FIG. doing.

In the above structure, when the forward / reverse switching lever 13 is rotated, the other end of the forward / reverse switching lever 13 is rotated along the pressing member 22, and the slide member 21 is accordingly rotated. Slide the top surface of the trigger switch body 10. At this time, the slide member 21 is constantly pressed against the opening 10b by the other end of the forward / reverse switching lever 13, so that the opening 10b is reliably closed by the slide member 21. At the same time, when the slide member 21 slides on the upper surface of the trigger switch body 10, the slide member 21 wipes the upper surface of the trigger switch body 10 to remove dust adhering to the upper surface of the trigger switch body 10. .

According to the above structure, the other end of the forward / reverse switching lever 13 is constantly pressed by the pressing member 22 toward the upper surface of the trigger switch body 10. Therefore, when the shaft 10a that rotatably holds the forward / reverse switching lever 13 on the trigger switch main body 10 and the fitting hole 13c of the forward / reverse switching lever 13 are loosened, or the forward / reverse switching lever is loose. Even when the other end of 13 is warped, it is possible to prevent the gap between the other end of the forward / reverse switching lever 13 and the upper surface of the trigger switch body 10 from expanding. Therefore, the opening 10b can be surely closed by the slide member 21 and dust can be prevented from entering the trigger switch main body 10.

Moreover, since it is possible to prevent the gap between the forward / reverse switching lever 13 and the upper surface of the trigger switch main body 10 from expanding, it is possible to prevent extra fine powdery dust from entering between them, and It is possible to prevent these from solidifying between the switching lever 13 and the upper surface of the trigger switch body 10.

Further, the slide member 21 slides on the upper surface of the trigger switch body 10 together with the forward / reverse switching lever 13 to remove dust adhering to the upper surface of the trigger switch body 10. The dust that adheres can be reduced. Therefore, the dust that solidifies on the upper surface of the trigger switch body 10 can be reduced.

Further, even when dust is solidified on the upper surface of the trigger switch body 10, when the forward / reverse switching lever 13 is operated, the solidified dust is removed by the slide member 21. Dust can be wiped out.

In the above embodiment, the protrusion 14f connecting the rotor 14a and the forward / reverse switching lever 13 is provided on the rotor 14a, and the engaging portion 13a is provided on the forward / reverse switching lever 13, but the present invention is not limited to this. The protrusion may be provided on the forward / reverse switching lever and the engaging portion may be provided on the rotor. Of course, various modifications can be made without departing from the spirit of the invention.

[0023]

[Effect of the invention]

 As described in detail above, according to the present invention, it is possible to prevent dust from entering the trigger switch body and prevent dust from adhering to the top surface of the trigger switch body, and to improve the dustproof effect. Can be provided.

[Brief description of the drawings]

FIG. 1 is a top view showing an embodiment of the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a top view showing a conventional trigger switch device.

FIG. 4 is a side sectional view showing a part of a conventional trigger switch device.

[Explanation of symbols]

 Reference numeral 10 ... Trigger switch body, 10b ... Opening portion, 11 ... Trigger operator, 13 ... Forward / reverse switching lever, 14 ... Forward / reverse switching switch, 14a ... Rotor, 14f ... Projection, 21 ... Slide member, 22 ... Pressing member.

Claims (1)

[Utility model registration claims] 1. A switch body in which a trigger operator is provided so as to be able to move in and out, a first switch provided in the switch body, and a switch state is set to be switched according to an operation of the trigger operator, A second switch provided in the switch body and having a rotatable rotor for switching the polarity of the power supply supplied to the first switch; and a first switch provided in the switch body and provided on the rotor. The opening for exposing the engaging portion of the switch and the central portion in the longitudinal direction are rotatably attached to the surface provided with the opening on the outside of the switch body, and one end in the longitudinal direction is used as the operating portion. A forward / reverse switching lever for rotating the rotor, the lever having a second engaging portion connected to the first engaging portion exposed from the opening between a central portion in the direction and the other end; , The forward / reverse switching lever A dustproof member provided between the surfaces of the switch body, having a size that slides on the surface together with the forward / reverse switching lever and closes the opening at any of the sliding positions, and the switch. A trigger switch device comprising: a pressing member which is provided on the surface of the main body and presses the other end of the forward / reverse switching lever in the surface direction.