JPH1086078A - Hand-holding type power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an appropriate grip position according to working conditions and improve usability in working with one hand by movably providing a grip in the longitudinal direction of an outer frame. SOLUTION: A grip 5 is supported in such a state as moving in the longitudinal direction of an outer frame 2 so that either one of two grip positions of 'front' and 'rear' can be selected and fixed. When the grip 5 is in such a selection state as being moved to the 'front', a superior gravity center balance can be obtained so that the load applied on the wrist can be reduced even in a case of using it with one hand. When the grip 5 is in such a selection state as being moved to the 'rear' and if the recessed part 2a of the outer frame 2 is held like holding, the pressing force can be efficiently applied in the rotary axis direction of the tip tool, while pressingly operating a trigger 4a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-held power tool such as a driver drill, a power drill, and a vibration drill.

[0002]

2. Description of the Related Art A conventional hand-held power tool of this type has a T-shape in which a grip is located substantially at the center of an outer frame, and an inverted L-shaped tool in which the grip is located at a rear end of the outer frame. Some are shaped like letters.

[0003]

Generally, a conventional hand-held power tool of this type is used by operating a trigger of a power switch housed in the grip while holding the grip with one hand. The T-shape has a good balance of center of gravity because the grip is located substantially at the center of the outer frame, and the burden on the wrist is small even when used with one hand. However, since the grip must be held at a position away from the axis of rotation of the accessory tool, it is difficult to effectively apply a pressing force in the direction of the axis of rotation to the accessory tool when drilling work on an iron plate or the like. In addition, there is a disadvantage that it is difficult to stably support the tool body.

In the L-shape, the grip can be held at a position close to the rotation axis of the tool bit, and the pressing force can be effectively applied to the tool bit. However, since the grip is located at the rear end of the outer frame, the front part of the main body is heavy with respect to the grip, and when using with one hand when tightening screws in the horizontal direction, the burden on the wrist is extremely large. And the workability was poor.

An object of the present invention is to improve the usability by enabling the grip to move in the longitudinal direction of the outer frame so that the grip position can be set according to the working conditions.

[0006]

The above object is achieved by making the grip movable in the longitudinal direction of the outer frame.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an embodiment of a driver drill which is a hand-held power tool. A chuck 3 is rotatably attached to the end of an outer frame 2 containing the motor 1, and a grip 5 containing a power switch 4 for turning on / off the power supply to the motor 1 is provided below the outer frame 2. , Are supported movably in the longitudinal direction of the outer frame 2. At the lower end of the grip 5, a storage battery 6 as a power supply is mounted.
When the trigger 4a of the power switch 4 is pressed, power is supplied from the storage battery 6 to the motor 1, and the motor 1 rotates. The chuck 3 for mounting the tip tool is a motor 1
In response to the rotation of, rotation is performed, thereby tightening screws and drilling work on an iron plate or the like.

The grip 5 is supported so as to be movable in the longitudinal direction of the outer frame 2, so that two grip positions "front" and "rear" can be selected and fixed in accordance with working conditions. In FIG. 3, stoppers 7 provided on both sides of the grip 5 are urged upward by a spring 8, and are fitted in fitting holes 2 b provided in the outer frame 2. Thereby, the movement of the grip 5 with respect to the outer frame 2 is suppressed, and even if a force is applied to the grip 5 or the outer frame 2 during work, the grip 5 does not shift. When the grip 5 is moved, the stopper 7 may be pulled down against the bias of the spring 8, and the stopper 7 is disengaged from the fitting hole 2b as shown in FIG. Therefore, the position of the grip 5 may be selected, and the grip 5 may be fixed by the corresponding fitting hole 2b.

FIG. 1 shows a selected state in which the grip 5 is moved "forward". In this case, a good balance of the center of gravity is obtained, so that the burden on the wrist can be reduced even when used with one hand. FIG. 2 shows a selected state in which the grip 5 is moved “backward”. In this case, by holding the concave portion 2a of the outer frame 2 so as to hold it, it is possible to effectively apply a pressing force in the rotation axis direction of the tool bit while pressing the trigger 4a.

In the above-mentioned embodiment, the selectable grip positions are described as two positions of "front" and "rear". However, if the fitting hole 2b is provided at any position between them, the grip position can be changed at any position. You can fix the grip.

[0011]

According to the present invention, the grip can be moved in the longitudinal direction of the outer frame, so that the grip position can be set according to the working conditions. As a result, the usability during one-handed work is greatly improved, and the work can always be performed at the optimum grip position even under different work conditions such as tightening of screws and drilling in an iron plate or the like.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a hand-held power tool according to the present invention, and is a partial cross-sectional view of the tip of the hand-held power tool when the grip is moved “forward”.

FIG. 2 is a partial cross-sectional view of a selected state in which the grip is moved “backward”.

FIG. 3A is a state in which the movement of the grip is suppressed.
FIG.

FIG. 4 shows a state in which the restraint of the movement of the grip is released.
Sectional view on the AA line of FIG.

[Explanation of symbols]

 2 is an outer frame, 4 is a power switch, and 5 is a grip.

Claims (1)

[Claims] 1. A hand-held power tool for working while gripping a grip formed on an outer frame, wherein the grip is movable in a longitudinal direction of the outer frame.