JPH0531063U - Trigger-switch misoperation prevention device - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if the trigger is pulled with a finger, the protrusion of the stopper hits the lower edge of the opening of the grip of the handle and the trigger cannot be pulled. An object of the present invention is to provide an erroneous operation preventing device for a trigger switch that can prevent erroneous operation of the trigger switch. A stopper 18 is inserted into a hollow portion 11 of a trigger body 10, a holding piece 21 provided on the stopper 18 is inserted into a stopper holding portion 14 of the trigger body 10, and a spring receiving portion of the hollow portion 11 is inserted. A spring 23 is interposed between the spring 13 and the spring receiving portion 19 of the stopper-18.
Thus, the stopper 18 is urged so that a part of the stopper 18 is projected from the opening 26 in the lower surface of the trigger body 10, and the projection 25 is located at the lower edge of the opening 9 of the grip 8 of the handle 5. It was located outside the portion 9a.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an erroneous operation preventing device for a trigger switch used in an electric tool or the like.

[0002]

[Prior Art]

 Generally, the trigger switch is equipped with a switch body, and the switch part inside the trigger switch body is installed by inserting and removing the rod part in the trigger switch body on the front side of the trigger switch body. A trigger (not shown) is attached to activate it.

Such a trigger switch is attached to a grip portion at a front portion of a handle of an electric power tool, and the trigger is projected in front of an opening portion of the grip portion. Therefore, by gripping the grip portion with a hand and squeezing the trigger with a finger, the trigger is pulled into the opening portion and the switch portion is operated via the rod portion.

[0004]

[Problems to be solved by the device]

 However, with the above configuration, if the trigger is accidentally squeezed with a finger, the trigger will easily operate, the trigger switch will operate, and the drill etc. will rotate. was there.

The present invention solves the above problems, and an object of the present invention is to prevent the protrusion of the stopper from opening the opening of the grip of the handle even when the trigger is squeezed with a finger. It is an object of the present invention to provide an erroneous operation preventing device for a trigger switch, which is capable of preventing the erroneous operation of the trigger switch because the trigger cannot be squeezed against the lower edge.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention is to insert a stopper into a hollow portion of a trigger body, and to attach a holding piece provided on the stopper to a stopper holding portion of the trigger body. The spring is inserted between the spring receiving part of the hollow part and the spring receiving part of the stopper, and the stopper is biased by this spring, and a part of the stopper is part of the trigger body. It is characterized in that it is projected from the opening on the lower surface, and this projection is located outside the lower edge of the opening of the handle grip.

[0007]

[Action]

 With such a configuration, even if the trigger is pulled with a finger, the protruding portion of the stopper hits the lower edge of the opening of the grip portion of the handle and the trigger cannot be pulled, so that the trigger switch cannot be pulled. It is possible to prevent erroneous operation.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a trigger switch having a malfunction prevention device according to the present invention. The trigger switch 1 is provided with a switch main body 2, and the front side of the trigger switch main body 1 is provided with the rod portion 3 in and out of the trigger switch main body 1 so that the inside of the trigger switch main body 1 is removed. A trigger-4 for activating a switch part (not shown) of the above is attached.

Such a trigger switch 1 is incorporated in the handle 5 of the power tool. That is, the handle 5 is provided with left and right housings 6 and 7 which are divided into two parts at the center line thereof. The shapes of the left and right housings 6 and 7 are symmetrical, and the front portion of the handle 5 has a grip portion 8. Is made in. An opening 9 is formed in the front surface of the grip portion 8, the trigger switch 1 is attached to the grip portion 8, and the trigger-4 is in a state of protruding in front of the opening portion 9. positioned. Therefore, by gripping the grip portion 8 with a hand and squeezing the trigger-4 with a finger, the trigger-4 is pulled into the opening portion 9 and the switch portion is operated via the rod portion 3.

In the present invention, a stopper mechanism for preventing erroneous operation is attached to the trigger-4. That is, the trigger-4 is provided with a trigger body 10 as shown in FIGS. 6 to 8, the inside of the trigger body 10 is hollow, and the hollow portion 11 is the lower surface of the trigger body 4. It opens to the portion 4a. On the bottom surface 12 of the hollow portion 11, a spring receiving portion 13 is formed in the front portion and a stopper-holding portion 14 is formed in the rear portion. The stopper-holding portion 14 includes a holding piece insertion portion 15, a locking portion insertion portion 16, and a locking step portion 17 located between the holding piece insertion portion 15 and the locking portion insertion portion 16. ing.

The stopper 18 is shown in FIGS. 9 to 11. A front side of the stopper 18 is provided with a spring receiving portion 19 on the upper surface portion 18a thereof, and the spring receiving portion 19 is provided with a protrusion 20. Further, holding pieces 21 are erected upward on the left and right sides of the upper surface portion 18a of the stopper 18, and locking portions 22 projecting outward are formed at the tip portions of the pair of holding pieces 21.

Then, the stopper 18 is inserted into the hollow portion 11 of the trigger body 10, the holding piece 21 is inserted into the holding piece insertion portion 15 of the stopper-holding portion 14, and the tip portion of the holding piece 21 is locked. The spring 23 is inserted between the spring receiving portion 13 of the hollow portion 11 and the spring receiving portion 19 of the stopper-18, and the spring 23 urges the stopper-18 downward. Then, the lower portion 25 of the stopper-18 is made to project from the opening 26 in the lower surface of the trigger body 4, the locking portion 22 is locked to the locking step portion 17, and the stopper-18 is incorporated in the trigger-4. Has been.

As described above, when the stopper-18 is incorporated in the trigger-4, the lower portion 25 of the stopper-18 protruding from the opening 26 on the lower surface of the trigger body 4 is opened in the grip portion 8 of the handle 4. It is located outside (lower side) of the lower edge portion 9a of the portion 9.

Next, prevention of erroneous operation of the trigger switch will be described. As described above, the lower portion 25 of the stopper 18 protruding from the opening 26 on the lower surface of the trigger body 4 is located outside (lower side) the lower edge 9a of the opening 9 of the grip 8 of the handle 4. In this state, even if the trigger-4 is pulled with a finger in this state, the lower portion 25 of the stopper-18 hits the lower edge portion 9a of the opening 9 of the grip portion 8 of the handle 4, This Trigger-4 cannot be narrowed down. This means that the erroneous operation of the trigger switch 1 is prevented.

When the trigger switch 1 is operated, the stopper 18 is pushed up against the spring 23 by the middle finger of the hand holding the grip portion 8 of the handle 5, and the stopper 18 is triggered. The trigger-4 is housed in the hollow portion 11 and is squeezed with a finger to pull the trigger-4 into the opening 9 and operate the switch portion via the rod portion 3.

According to the above embodiment, the stopper 18 is inserted into the hollow portion 11 of the trigger body 10, and the holding piece 21 provided on the stopper 18 is inserted into the stopper holding portion 14 of the trigger body 10. At the same time, a spring 23 is interposed between the spring receiving portion 13 of the hollow portion 11 and the spring receiving portion 19 of the stopper 18, and the spring 23 urges the stopper 18 to form a part of the stopper 18. The trigger 4 is projected from the opening 26 on the lower surface of the trigger body 4, and the projection 25 is positioned outside the lower edge 9a of the opening 9 of the grip portion 8 of the handle 4. Even if it is squeezed with a finger, the protruding portion 25 of the stopper-18 hits the lower edge portion 9a of the opening 9 of the grip portion 8 of the handle 4 and the trigger-4 cannot be squeezed, so that the trigger switch Misoperation prevention of 1 It can be stopped.

[0017]

[Effect of the device]

 As described above, according to the present invention, the stopper is inserted into the hollow portion of the trigger main body, the holding piece provided on the stopper is inserted into the stopper holding portion of the trigger main body, and the spring receiving portion of the hollow portion is inserted. A spring is interposed between the stopper and the spring receiving portion of the stopper, and the spring biases the stopper to cause a part of the stopper to protrude from the opening on the lower surface of the trigger body. Is located outside the lower edge of the grip opening of the handle, so that even if the trigger is pulled down with your finger in this state, the protruding part of the stopper will cause the lower edge of the opening of the handle grip to The trigger cannot be narrowed down by hitting a part, and the erroneous operation of the trigger switch can be prevented.

[Brief description of drawings]

FIG. 1 is a side view of a trigger switch having an erroneous operation prevention device according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of a handle.

FIG. 4 is a front view of a handle.

FIG. 5 is a front view of the right housing of the handle.

FIG. 6 is a plan view of a trigger.

FIG. 7 is a sectional view taken along the line 6A-S-T-U-V-B-C-D.

FIG. 8 is a bottom view of the trigger.

FIG. 9 is a plan view of a stopper.

FIG. 10 is a side view of the same.

FIG. 11 is a cross-sectional view taken along the line JJKL of FIG.

[Explanation of symbols]

 1 Trigger switch 4 Trigger 5 Handle 8 Grip part 10 Trigger body 11 Hollow part 14 Stopper-holding part 18 Stopper-19 Spring receiving part 23 Spring

Claims (1)

[Scope of utility model registration request] 1. A stopper is inserted into a hollow portion of a trigger main body, a holding piece provided on the stopper is inserted into a stopper-holding portion of the trigger main body, and a spring receiving portion of the hollow portion and a spring receiving portion of the stopper are provided. A spring is interposed between the trigger and the spring, and the spring biases the stopper to cause a part of the stopper to protrude from the opening on the lower surface of the trigger body, and this protrusion is attached to the grip of the handle. A trigger-switch erroneous operation prevention device characterized in that it is positioned outside the lower edge of the opening.