Title:
TRIGGER SWITCH CIRCUIT FOR POWER TOOL
Document Type and Number:
Japanese Patent JP3704432
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit particularly for reducing contact point abrasion of a power source switch and a short-circuit switch in a trigger switch circuit mounted on a power tool.
SOLUTION: Four members of a power source switch SW1 in a trigger switch circuit, a speed setting first sliding piece sliding on a variable resistor RG, a voltage control second sliding piece connected to a gate of a switching element FET and a short-circuit switch SW2 are constituted so as to be operated by interlocking with an operation lever. Thus, the power source switch SW1 is turned on and off when the first sliding piece exists in a position dislocated from the variable resitor RG, and the short-circuit switch SW2 is turned on and off when the second sliding piece is put in a floating state.
Inventors:
Hiroyuki Yahagi
Shinichi Masuda
Isao Inagaki
Shinichi Masuda
Isao Inagaki
Application Number:
JP19048698A
Publication Date:
October 12, 2005
Filing Date:
July 06, 1998
Export Citation:
Assignee:
Satori S Tech Co., Ltd.
International Classes:
B23B45/02; B25F5/00; (IPC1-7): B25F5/00; B23B45/02
Domestic Patent References:
| JP6014576A | ||||
| JP8207800A | ||||
| JP7043007U |
Attorney, Agent or Firm:
Isao Sasaki
Kyoko Kawamura
Kyoko Kawamura