JPH0368788U

JPH0368788U -

Info

Publication number: JPH0368788U
Application number: JP12861289U
Authority: JP
Priority date: 1989-11-02
Filing date: 1989-11-02
Publication date: 1991-07-08
Anticipated expiration: 2004-11-02
Also published as: JP2517753Y2

Description

[Brief explanation of drawings]

第１図は、本考案の一実施例を示す電動用工具
のハンドル部の一部を断面にした側面図、第２図
及び第３図はハンドル部の一部を断面にした平面
図、第４図は、停止している状態の電気回路図、
第５図乃至第８図はスイツチの作動状態を示す説
明図、第９図は、第２図の−′線断面図、第
１０図は、第３図の−′線断面図、第１１図
は、従来のトリガスイツチの説明図である。１０……第１のスイツチ、１１……第２のスイ
ツチ、１２……揺動アーム、１３……弾性部材、
１４……トリガ、１５……オフロツクボタン、１
７，１７ａ……リブ部、１８……切欠部、２０…
…ハンドル部、３１……界磁コイル、３３……モ
ータの電機子。 FIG. 1 is a side view with a part of the handle section of a power tool showing an embodiment of the present invention, FIGS. 2 and 3 are plan views with a part of the handle section in section, and FIG. Figure 4 is an electrical circuit diagram in a stopped state.
5 to 8 are explanatory diagrams showing the operating states of the switch, FIG. 9 is a sectional view taken along the line -' in FIG. 2, FIG. 10 is a sectional view taken along the line -' in FIG. 3, and FIG. 1 is an explanatory diagram of a conventional trigger switch. 10... first switch, 11... second switch, 12... rocking arm, 13... elastic member,
14...Trigger, 15...Off-lock button, 1
7, 17a...rib part, 18...notch part, 20...
...Handle part, 31...Field coil, 33...Motor armature.

Claims

[Claims for Utility Model Registration] (1) A motor having a drive circuit and a braking circuit connected to a motor, and comprising a first switch and a second switch for switching between the drive circuit and the braking circuit, Whenever the first switch turns on the drive circuit to supply power to the motor, the second switch always turns off the braking circuit before turning on the drive circuit and supplies power to the motor. When the power is turned off, the first pushing member and the second pushing member push the first and second switches with a time lag in which the second switch turns on the braking circuit. 1. A trigger switch for a power tool, characterized in that a movable member and a trigger having a long finger rest portion for pushing and operating the first and second push members are provided in a handle portion of the power tool. (2) An off-lock button for sliding the first pushing member is provided in a part of the handle part, and the pushing member of the off-lock button swings the first pushing member, 2. The trigger switch for a power tool according to claim 1, wherein said trigger is braked when one pushing member is in a predetermined position.