JPS62120980A - Battery 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) This invention relates to a battery driver with a built-in battery, a battery drill,
The present invention relates to battery-powered tools such as driver drills, and particularly to battery-powered tools applied to screw tightening work.

(Prior Art) As a conventional technology, there is, for example, Japanese Utility Model Application Publication No. 58-162790.

(Problems that the invention attempts to solve) With conventional power tools, the motor continues to rotate due to inertia even after the trigger is stopped, and work must be interrupted until the Tanabata rotation stops. For example, when tightening a screw, if the screw is screwed in incorrectly, the incorrect tightening operation continues even after the trigger is stopped, and it takes time to correct the problem. However, there have been problems in that it is difficult to position the screw so that the screw head is aligned with the surface to be machined and to screw in the screw in an appropriate state.

SUMMARY OF THE INVENTION An object of the present invention is to provide a battery-powered tool that can stop the motor immediately after an operation to stop its rotation, thereby making work more efficient and accurate.

(Means for Solving the Problems) The present invention provides a switch linked to a trigger that opens and closes an operating circuit connected to a battery and a motor when the trigger is released or pressed. The gist of the present invention is to provide a battery-powered tool that is provided with a contact point for short-circuiting both terminals of the motor at the same time as the circuit of the operating circuit to stop the inertial rotation of the motor.

(Function) The battery tool of the present invention opens the operation circuit for starting and stopping the motor by releasing the trigger, and at the same time shorts both terminals of the motor to immediately stop the inertial rotation of the motor by using a back electromotive force. It is designed to be transparent.

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

The housing 1 of the tool body of the battery tool has a pair of left and right shells that can be vertically divided into two parts, the sides are formed in an inverted shape, and a grip 1a is formed at the bottom of the rear end.
A battery compartment 2 for storing a battery 5 is formed inside the battery compartment 2, and a motor compartment 3 for housing a motor 6 is connected to one side of the battery compartment 2. A gear lock 4 is used to house a gear system 8 that transmits the rotation of the motor 6 to a tilt wheel 7 that is rotatably supported at the tip of the tool body.
are installed in succession.

A storage section 9 formed in the shape of a groove that opens forward and downward is located at the lower end of the housing 1 and is located below the battery compartment 2 in order to allow the rotary tool K to be inserted and removed from the chuck 7 to be stored therein. It is recessed along the front-rear direction, and a pair of left and right protrusions 9a for locking the rotary tool K stored therein are each slightly stepped near the center of the lower edges on both sides.

The level storage chamber 11 is inserted and protected into a duplex 10a made of transparent synthetic resin material, and is used to store the IC level 10 horizontally parallel to the axis of rotation a of the rotary tool inserted into the jack 7. It is connected above the motor chamber 3, and has a window 11a opened at its upper end for viewing the spirit level 10.

A tool holder 13, which has a substantially horizontal C-shaped cross section, is recessed above the rear end of the gear 4 to removably and elastically hold a chuck rotation tool 12 for rotating the chuck 7. It is secured in the recessed portion 17.

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 backwards and elastically returned to the front side. It has an operating piece 14a that is supported and protrudes upward.

A switch 16GJ is installed above the trigger 14 at the upper end of the battery compartment 2. [The operating circuit connected to both terminals of the pond 5 and both terminals of the motor 6 is closed by pressing operation J5 and releasing operation of the trigger 14. and both terminals B1 of the battery 5 to open the circuit.
．． B2 and two normally open contacts S, C connected to both terminals Ml and M2 of the motor 6, respectively, and both terminals M1. M
The switch 16 is provided with a normally closed contact a connected to both terminals Ml and M2 of the motor 6 in order to short-circuit the two terminals and generate a back electromotive force. The connected movable piece 16a is slidably inserted, and the switch 1
Each of the contacts a, b, and C of 6 is connected to a speed change control circuit I incorporating a transistor. And ]・Trigger 4
When the movable piece 16a moves backward in conjunction with the trigger 14, the normally closed contact a turns OFF and then the normally open contact b turns ON, and the motor 6 shifts to 1l.
If it is connected to the control circuit H and activated, and the bird is
When the retracted position of the movable piece 16a is adjusted by adjusting the pressing force on the movable piece 16a, the contact position between the brush (not shown) locked on the movable piece 16a and the resistance board of the speed change control circuit is displaced, and the motor 6 Since the resistance value changes, the motor 6 can be rotated at variable speeds at the output rotation speed corresponding to the pressing force on the trigger 14. Also, by further pressing the trigger 14 to near the tilting end, the motor 6 can be rotated at variable speeds. When 16a is moved to the vicinity of the rearward end, the normally open contact C is turned on and the speed change control circuit H is short-circuited, the resistance value to the motor 6 is reduced and the motor 6 can be rotated at the maximum rotation speed.

Then, when the trigger 14 is released and returned to its original position, the movable piece 16a returns to the forward end, and both of the contact points (a) and (c) of the switch 16 are turned off, and the electric power to the motor 6 is turned off. i? ! ! 5 At the same time as the power supply is stopped,
The normally closed contact a turns ON and both terminals M1 of the motor 6 are turned on. M2
The motor 6 is braked by the armature show 1-, and the inertial rotation of the seventh motor 6 can be stopped.

For example, as shown in FIG. 3, a concave portion 15 that opens downward and is recessed into the front side of the upper end of the grip 1a of the housing 1 so that a finger adjacent to the finger for operating the trigger is inserted therein is inserted into the concave portion 15 that is open downward and is inserted into the front side of the upper end of the grip 1a of the housing 1. With the little finger U3 in contact with the trigger 14 so that it can be pressed, insert the middle finger U1 and tighten the grip 1a.
The lower end of the rear end surface 15a and the upper end of the front end surface 14b of the trigger 14 in the released state are slightly different from each other. They are arranged almost continuously with a gap in between.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, in order to open and close the operation circuit connected to the battery 5 and the motor 6 by releasing and pressing the trigger 14, the switch 16 linked to the trigger 14 is connected to the switch 16 by releasing the trigger 14 and by pressing the trigger 14. Since the contact a is provided to short-circuit both terminals M1 and M2 of the motor 6 and stop the inertial rotation of the motor 6 with a back electromotive force at the same time as the operating circuit is opened, the trigger 14 is released at the same time. Brake motor 6 and
The inertial rotation of the motor 6 can be immediately stopped, and the inconvenience of interrupting the work while the motor 6 continues its inertial rotation is eliminated, thereby making the work more efficient.

Therefore, in screw tightening work, for example, there is no need to wait for the motor to stop, so the screw tightening work can be performed efficiently without interruption, and the rotational movement of the rotary tool can be immediately stopped. The screw head is placed in the desired position (same plane as the workpiece surface).
It can be positioned and screwed in.

(Effects of the Invention) That is, the present invention provides a switch linked to a trigger for opening and closing an operating circuit connected to a battery and a motor by releasing and pressing the trigger. At the same time as the navigation operation circuit, a contact point is provided to short-circuit both terminals of the motor to stop the inertial rotation of the motor. This has the effect of not only improving work efficiency by eliminating problems that would make continuous work impossible, but also allowing the rotary tool to be accurately stopped at a desired position.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway side view of the battery tool, FIG. 2 is a circuit diagram, and FIG. 3 is a perspective view without showing the state of use. 1...Housing 5...Battery 6...Motor 16...Switch D...Tool body

Claims (1)

[Claims] When the trigger is released or pressed, a switch connected to the trigger opens or closes the operating circuit connected to the battery and the motor. A battery-powered tool characterized by having a contact point for short-circuiting and stopping the inertial rotation of the motor.