JPS62120986A - Power tool - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) Ru.

(Prior art) In general, the above-mentioned screw-shaped electric tools are often used with the grip held in one hand, and the grips 1 to 1 on the inside F section of the grip are pressed. Work was performed by holding the grip at a position away from the rotational axis of the rotary tool (a problem that the invention aims to solve).As a result, the grip on the tool body was unstable and workability deteriorated. There was a problem.

[One object] of the present invention is to provide a power tool that can improve workability by stabilizing the gripping state of the tool body during work.

(Means for Solving the Problems) The present invention provides a screw-type housing for rotating a rotary tool by inserting a finger adjacent to a finger for operating a trigger into the housing of the main body. The idea is to use an electric motor J-↓-1i in which a concave portion is formed adjacent to one of the above-mentioned rims in order to grip it at a position close to the axis.

(Function) The power tool of the present invention positions the grip close to the rotational axis of the rotary tool by forming a concave portion in the grip of the housing into which a finger adjacent to the first finger for operating the rigger is inserted;
It is constructed so that it can hold 1/1' leaf.

(Example) Next, one embodiment of the present invention will be described with reference to the drawings.

The housing 1, which is the main body of a power tool, has a pair of left and right shells that can be divided vertically into two parts. A battery chamber 2 for storing a battery 5 is formed in the grip 1a formed in the grip 1a, and a motor chamber 3 for storing a motor 6 is connected above the battery chamber 2. To,
A V gear chamber 4 is connected to the front of the motor chamber 3 for housing a gear system 8 for transmitting the rotation of the motor 6 to a chuck 7 rotatably supported at the tip of the tool body.

A storage section 9, which is formed in a spiral shape and opens forward and downward, is arranged at the lower end of the housing 1 in the front-rear direction with respect to the lower part of the battery chamber 2, in order to store the rotary tool K inserted into the chuck 7 so that it can be inserted and taken out. A pair of left and right protrusions 9a for locking the stored rotary tool K are slightly curved near the center (d) of the lower edges on both sides.

The spirit level storage space 11 is inserted into the chuck 10a made of transparent synthetic resin to protect the water tv;
The E-9 chamber 3 is connected above the E-9 chamber 3 in order to store it in a horizontal position parallel to the rotation axis a of the rotary tool set in stone. 11a is open.

A tool holder 13, which has a substantially horizontal C-shaped cross section, is provided with a recess formed above the rear end of the gear chamber 4, in order to removably and elastically grip the telescopic rotation tool 12 for rotating the chuck 7. It is stored within 17 days.

In order to start and stop the motor 6 by pressing and releasing the trigger 14, the trigger 14 has a lower end near the upper end of the grip 1a of the housing 1 so that it can be tilted rearward with respect to the front side and can be elastically returned forward. It has a supported and upwardly projecting operation j'114a.

A speed change switch 16 installed above the trigger 14 at the upper end of the battery compartment 2 closes and closes the operating circuit connected to both terminals of the battery 5 and both terminals of the motor 6 by pressing and releasing cB of the trigger 14. Both terminals of battery 5 and
[In order to short-circuit both terminals of the motor 6 and generate a back electromotive force when stopping the e-taro by circuiting the two normally closed contacts connected to both terminals of the motor 6 and the operating circuit. The shift switch 16 includes a normally closed contact connected to both terminals of the Tanabata 6, and a movable piece 16a that is connected to the operation pieces 14F of the trigger 1 to 14 so as to be interlocked in the front and rear directions. is inserted in a slidable manner, and is further connected to a speed change control circuit incorporating transistors at each contact point of the speed change switch 16. When the trigger 14 is pressed backward, the movable piece 16a moves against the trigger 14. While moving backward in conjunction, one of the two regular contacts connected between both terminals of the electric i!!50 and both terminals of the t-96 turned ON, and [-Taro sent 1 to the speed change control circuit. Tanabata 6
is started, and further, by adjusting the pressing force on the riggers 1 to 14, the movable piece 15a moves back (by adjusting the Q position, the movable piece 16
The contact between the brush (not shown) and the resistance J of the speed change control circuit and the plate (ii) and 7 fluctuates and the resistance value for the motor changes. It can be rotated at an output rotation speed corresponding to the pressing force, and when the trigger 14 is further suppressed to the vicinity of the tilting end and the movable piece 16a is displaced toward the backward end, +'+
The other of the normal contacts f is turned on, 1) 42 speed change control circuit is short-circuited, the resistance value of the motor 6 is reduced, and the motor 6 can be rotated at the maximum rotation speed.

When the trigger 14 is released and returned to its original position, the movable piece 16a returns to the forward end, and the speed change switch 16
The above-mentioned junctions of the two terminals each become O(koF), and the supply of power from the battery 5 to Shitaro is stopped, and
The normally closed contact is turned on and the voltage between both terminals of the motor 6 is 'f'.
r1 is connected, the motor 6 can be braked by the armature brake, and the rotation of the motor 6 can be stopped.

For example, as shown in FIG. 2, a downwardly open recess 15 is formed on the front side of the upper end of the grip 1a of the housing 1 so that the finger adjacent to the finger for operating the trigger is inserted. Then, insert the middle finger U1 with the little finger U3 in contact with the trigger 14 so that it can be pressed, and grip 1.
Turn a and press thumb U4 at a position close to the rotation axis a of the φλ tool.
I! above trigger 14 to hold it together! AI is installed, and the lower end of the rear end surface 15a and the trigger 1 in the released state
The upper end of the front end surface 14b of No. 4 is disposed in a substantially continuous manner with a slight gap therebetween.

Continuing ('), the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, the housing 1 is used in order to grip the grip 1a of the housing 1 at a position close to the rotational axis a of the rotary tool by using the middle finger U1 adjacent to the ring finger U2 for operating the gripper. Concave portion 15 located above and adjacent to the trigger 14
Because of this, it is possible to stably and strongly grip the tool body to improve workability and maneuverability, and also to precisely move the tool body in the direction parallel to the rotational axis a with respect to the workpiece surface. It has the effect of effectively applying pressing force to the surface to be machined and making screw tightening work and drilling work more accurate.

In particular, in the case of a battery built-in power tool in which the battery 5 is housed in the grip 1a as in this example, the grip portion is extended in the vertical direction, making it possible to stably operate the grip while operating the grip 1a. Although it will be difficult, place your finger on the recessed part 15.
++ Since the b-grip 1a can be gripped above the trigger 14, the operability can be significantly improved.

(Effects of the Invention) According to the present invention, 16 fingers adjacent to the finger for operating the trigger are inserted into the housing of the pistol-shaped tool body, and the grip of the housing is gripped at a position close to the rotational axis of the rotary tool. By forming a concave portion adjacent to the upper part of the trigger in the handle, the tool body can be gripped stably and firmly to improve operability, and the pressing force can be effectively applied to the tool body. Select the effects that can be added.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, so FIG. 1 is a partially cutaway side view of the power tool, and FIG. 2 is a perspective view showing the power tool in use. 1... Housing 1a... Grip 14... Trigger 15... Concave portion D... Tool body

Claims (1)

[Claims] A finger adjacent to the finger for operating the trigger is inserted into the housing of the pistol-shaped tool body to grasp the grip of the housing at a position close to the rotation axis of the rotary tool. A power tool characterized by forming a concave portion.