JP2597031Y2 - Electric tool - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a power tool having a rotatable handle.

[0002]

2. Description of the Related Art In a conventional electric power tool, a handle is fixed to a body by screws or the like, and cannot be rotated. However, in recent years, power tools such as a cordless driver drill and an orbital sander that make the handle rotatable have been put on the market, but a turning mechanism and a switch for the handle are separately provided.

[0003]

A conventional power tool having a rotatable handle is capable of rotating the handle even during work, and the handle may rotate during work. There is also a risk that the switch may be accidentally turned on while the handle is rotating.

An object of the present invention relates to the safety of a power tool having a rotatable handle.

[0005]

The above object is achieved by disposing a lock lever between a lock piece for fixing a handle of a power tool having a rotatable handle and a trigger for turning on and off a switch.

[0006]

The lock lever of the power tool constructed as described above operates so as to prevent the switch trigger from being turned on when the handle is turned, and to prevent the lock piece from moving when the switch is turned on. Operate.

[0007]

1 to 6 show an embodiment of the present invention. FIG.
FIG. 2 is an overall side view in which the present invention is applied to a disk grinder. As shown in FIG. 2, the handle 2 is provided so as to cover the outer periphery of the body 1 one round. The body 1 is provided with several grooves 1a on the outer periphery. Fig. 3 inside the handle 2
As shown in FIG. 1, a lock piece 3, a lock lever 5, a spring 4, a trigger 6, and a switch 7 are provided. When the handle 2 is fixed, the lock piece 3 is fitted into the groove 1a as shown in FIG.
Is blocking the movement. When the switch 7 is turned on, the trigger 6 is pulled upward or downward as shown in FIG. When the flange 6a of the trigger moves through the groove 5a of the lock lever, the trigger 6 pushes the roller 7a of the switch, and the switch 7 is turned on. When the handle 2 is rotated, as shown in FIG. 5, when the lock lever 5 is pulled up,
When the protrusion 5b of the lock lever enters the flange groove 6b of the trigger and fixes the trigger 6, the switch 7 does not enter. The lock piece 3 becomes movable when the lock lever 5 is raised, and the handle 2 becomes rotatable when the lock piece 3 comes out of the groove 1a of the body. The handle 2 is rotated, the lock piece 3 is inserted into the groove 1a of the body, and the handle 2 is fixed.
When the lock piece 3 moves, the lock lever 5 is lowered by the spring 4 so that the trigger 6 is put in. In a state where the trigger 6 is inserted, the flange groove 6b of the trigger is displaced from the lock lever 5 as shown in FIG.

Although the embodiment describes a disk grinder, the present invention applies to all power tools having a handle.

[0009]

According to the present invention, since the turning mechanism of the handle of the power tool and the on / off operation of the switch cannot be performed simultaneously, the safety of the power tool can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the power tool of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view of a handle.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a partial cross-sectional view showing a state in which the handle of FIG. 4 is rotatable.

FIG. 6 is a partial handle view showing a state where the switch of FIG. 1 is turned on.

[Explanation of symbols]

1 is a body, 1a is a groove in the body, 2 is a handle, 3 is a lock piece, 4 is a spring, 5 is a lock lever, 5a
Is a lock lever groove, 5b is a lock lever protrusion, 6 is a trigger, 6a is a trigger flange, 6b is a trigger flange groove, 7 is a switch, 7a is a switch roller, and 9 is a power cord.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B25F 5/00 B24B 23/00 B25F 5/02

Claims (1)

(57) [Scope of request for utility model registration] 1. A power tool which houses a motor, a reduction gear provided in the body, a handle provided on an outer periphery of the body, and a power tool capable of rotating the handle with respect to the body. A power tool comprising: a mechanism that does not turn on when the handle is rotating; and a mechanism that prevents rotation of the handle when the handle is turned on.