JPH0516167U - Electric tool - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the reliability and safety of the switch by making the switch on hand of the power tool into a structure that does not shift to continuous operation even if the lock button is accidentally operated during intermittent operation. [Structure] When the hand switch 21 mounted on the grip 11 of the electric tool 10 is continuously operated, the hand switch 21
When the lock button 31 is pushed in at the first rotation position e in the closed state, the lever 33 is inserted into the lock hole 23 and the hand switch 21 is locked, so that continuous operation can be performed. Further, during intermittent operation, when the lock button 31 is rotated 90 degrees to the second rotation position f, the lever 33 closes the lock hole 23, so that even if the lock button 31 is touched by mistake, the hand switch 21 is in the closed state. Do not lock with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a power tool for handheld use.

[0002]

[Prior Art]

 Conventional electric tools are generally equipped with a hand switch to operate by operating the hand switch with a fingertip, but the operating method is to open and close the hand switch intermittently for a short time or to lock the hand switch for a long time. It may be used continuously.

FIG. 5 is a diagram showing an example of a conventional electric power tool. A grip button 11 has a lock button 31 and when the hand switch 21 is pulled with a fingertip, the electrical contact 22 of FIG. 6 is closed. FIG. 6 shows the structure of the above hand switch. FIG. 7 is a view for explaining the action of the lock button 31, and when the hand switch 21 is operated by the above-mentioned method, the pin 34 of the lock button 31 is positioned right next to the lock hole 23. When the lock button 31 is pushed, the pin 34 is inserted into the lock hole 23 and continuous operation is performed.

[0004]

[Problems to be solved by the device]

 However, in the above-described conventional electric power tool, when the pin 34 of the lock button 31 shown in FIG. 6 is inadvertently touched by the lock button 31 during intermittent operation, the pin 34 is inserted into the lock hole 23 shown in FIG. As a result, the hand switch 21 may be locked, which is dangerous because the intermittent operation suddenly shifts to the continuous operation. Especially when used by left-handed persons, it is highly likely that erroneous operation will be performed. The present invention provides a power tool that can be opened and closed for intermittent operation freely and safely even if the lock button is accidentally touched by the hand during intermittent operation of the power tool. It is a thing.

[0005]

[Means for Solving the Problems]

 In the present invention, the lock button has a lever structure, and the lever is rotated 90 degrees counterclockwise so that the lever closes the lock hole of the hand switch.

[0006]

[Action]

 In the power tool of the present invention configured as described above, when the lock button is rotated 90 degrees counterclockwise to the second rotation position, the lever integrated with the lock button closes the lock hole of the hand switch and the hand switch. Is not locked. Therefore, even if the lock button is accidentally touched while using the power tool, the hand switch is not locked to the side during continuous operation.

[0007]

【Example】

 FIG. 1 shows an example of a hand switch 21 used to operate the power tool 10 of the present invention. FIGS. 1 (A) and 1 (B) show the hand switch 21 attached to the power tool 10, and FIG. FIG. 1D is a side view of the hand switch 21. Reference numeral 20 denotes a case of the hand switch, which is provided with a lock button 31, and a lever 33 is provided at the tip of the lock button 31, and the lever 33 is viewed counterclockwise from the first rotation position e when viewed from the direction of the lock button 31. The structure is such that it is rotated by 90 degrees and stops at the second rotation position f. Reference numeral 21 is equipped with a mechanism for operating a contact 22 which can be opened and closed by a hand switch. The hand switch 21 is provided with a lock hole 23 into which the lock button 31 can be inserted.

FIG. 2 is a diagram showing when the hand switch 21 is locked. When the hand switch 21 is operated to the power-on side, the lock hole 23 is located right next to the lock button 31. When the lock button 31 is pushed by hand and the lock button 31 is inserted into the lock hole 23, the hand switch 21 is locked and cannot be returned. Therefore, continuous operation can be performed.

FIG. 3 shows a second rotation position f of the lever 33 when the lever 33 provided on the lock button 31 for preventing the above-mentioned lock is rotated 90 degrees counterclockwise as viewed from the lock button direction. In this figure, if the hand switch 21 is operated to the power-on side in this state, the lever 33 closes the lock hole 23 and the lock button 31 cannot be inserted even if the lock hole 23 is located right next to the lock button 31. ..

Therefore, when operating the electric tool continuously, by inserting the lever 33 of the lock button 31 into the lock hole 23 of the hand switch 21, the hand switch 21 can be locked in the closed state, and intermittently. In the case of driving to the right, the lever 33 of the lock button 31 is rotated 90 degrees counterclockwise from the first rotation position e as viewed from the direction of the lock button 31 to the second rotation position f to rotate the hand switch 21. By closing the lock hole 23, the operating state can be distinguished.

[0011]

[Effect of the device]

 As described above, the hand switch of the power tool of the present invention does not lock the hand switch even when the lock button for continuous operation is touched by the hand, unlike when the power tool is intermittently operated. .. Especially when used by a left-handed person, there is no fear of erroneous operation and the power tool can be operated safely.

[Brief description of drawings]

1 shows an example of a hand switch of a power tool of the present invention, (A) is a front view, (B) is a side view, (C) is a view showing the structure of a hand switch, and (D) is (C). FIG.

FIG. 2 is a view showing that the hand switch of the power tool of the present invention is inserted into the lock hole for continuous operation of the lock button to put the hand switch in a locked state.

FIG. 3 is a view showing the position of the lock button lever of the power tool of the present invention when the lock button lever is rotated 90 degrees counterclockwise when viewed from the lock button direction.

FIG. 4 is a view showing a hand switch of the power tool of the present invention in a state in which the lever of the lock button closes the lock hole and the hand switch cannot be locked.

FIG. 5 shows an example of a conventional electric power tool, (A) is a front view and (B) is a side view.

6A and 6B are views showing a pin structure and a side view, respectively, of a hand switch of a conventional electric tool.

FIG. 7 is a view showing that a pin of a hand switch of a conventional electric tool is inserted into a lock hole.

[Explanation of symbols]

 10 Electric Tool 11 Grip 20 Case 21 Hand Switch 22 Electrical Contact 23 Lock Hole 31 Lock Button 32 Case 33 Lever 34 Pin

Claims (1)

[Scope of utility model registration request] 1. A slide type hand-held switch provided in a grip portion and having a lock hole, and a lock button for locking the hand-held switch at a closing position by being inserted into the lock hole. This lock button is the first on the tip
The lock button can be inserted into the lock hole when it is in the rotation position, and the lock button is
An electric tool in which a lever that cannot be inserted is attached to the lock hole when the lever is rotated to a second rotational position by 0 degree.