JPH0440863Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a power wiring network device that improves the method of fixing a forward/reverse rotation switch for changing the rotation direction of a motor of an electric drill or the like.

[Background of the idea]

Conventionally, as shown in FIG. 5, a forward/reverse switch 7 inserted into a wiring block 5 is held between ribs 11 integrally formed with an outer frame A2 and an outer frame B8. However, with this method, it is inevitable that a gap will be formed between the outer frame 10 of the forward/reverse changeover switch 7 and the rib 11. For this reason, the forward/reverse changeover switch 7 vibrates within the outer frame due to vibrations during use, causing poor contact between the electrodes, leading to generation of electric arc, and melting of the electrodes. In order to eliminate this drawback, it has been desired to improve the method of fixing the forward/reverse switch.

[Purpose of invention]

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, increase the reliability of this type of electrical equipment, and improve the ease of assembly.

[Summary of the idea]

In this invention, the motor and wiring block are placed in the outer frame of the power tool, the forward/reverse rotation selector switch of the motor is inserted into the pin terminal protruding from the wiring block, and the switch and all other parts are placed in the outer frame. In order to ensure the electrical connection between the forward/reverse selector switch and the wiring block when The relationship between the wiring block and the elastic body has been devised.

[Example of idea]

An embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, a rotor 3, a stator 4, and a wiring block 5 are arranged on an outer frame A2 of a power tool main body 1, and then components such as a spindle and a switch are wired. Finally, insert the forward/reverse rotation switch 7 into the electrode pin 6 of the wiring block 5 shown in FIG.
After that, it is covered with the outer frame B8. At this time, outer frame B
There is a tongue piece 9 integrally molded inside the switch 8, which is provided so as to press the outer frame 10 of the forward/reverse selector switch 7 against the wiring block 5, so that the forward/reverse selector switch 7 is prevented from contact failure due to vibration during use. Does not cause As shown in FIG. 3, the tongue piece 9 is provided with a U-shaped groove to apply a pressing force to the outer frame 10 of the forward/reverse changeover switch 7 over a wide range. Also the fourth
As shown in the figure, if the tip of the tongue piece 9 is provided with a slope, the assembly can be carried out smoothly.

FIG. 6 shows a modified example. In this figure, after storing the forward/reverse changeover switch 7 in the outer frame A2, the elastic plate 12 is inserted into the holder rib 13 provided in the outer frame A2, and the forward/reverse changeover switch 7 is firmly pressed against the wiring block 5. Furthermore, since the plate is held by the holder ribs 13 of the outer frame B8, the forward/reverse rotation changeover switch 7 can be pressed against the wiring block 5 more reliably.

Although not shown, an elastic wire is attached to the plate 1.
It may be used as a substitute for 2.

[Effect of idea]

According to the present invention, since the forward/reverse changeover switch can be securely fixed to the wiring block, poor contact between the electrodes can be prevented, and breakdowns due to heat generation can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing an embodiment of the method of fixing the forward/reverse selector switch of a motor of a power tool according to the present invention, Fig. 2 is a perspective view of the same component parts, and Fig. 3 is the same as Fig. 1. FIG. 4 is a side view of a local section taken from direction A, FIG. 4 is a cross-sectional view taken along the line -- in FIG. 1, FIG. FIG. In the figure, 1 is the power tool body, 2 is the outer frame A,
5 is a wiring block, 6 is an electrode pin, 7 is a forward/reverse rotation switch, 8 is an outer frame B, 9 is a tongue piece, and 10 is an outer frame.

Claims (1)

[Scope of Claim for Utility Model Registration] In a power tool in which the output shaft is switched between forward and reverse rotations, the direction of rotation of the motor is switched by switching an electric circuit. When connecting the wiring network created between the main switch and the motor to the block-shaped wiring block in order to supply power to the circuit, insert a pin-shaped electrode into the socket-shaped electrode to connect the electrical circuit network. Regarding the motor and wiring block to be formed, and power wiring network devices such as forward/reverse switching devices, insert the wiring block into which the forward/reverse switching device is inserted into the stator, and connect the forward/reverse switching device to the wiring block fixed to the outer frame together with the rotor. A power wiring network device for a power tool, characterized in that a presser rib of a forward/reverse rotation switching device of an outer frame paired with the outer frame is given elasticity in order to apply a pressing force from the direction of insertion.