Title:
【発明の名称】電動工具のスイッチ機構
Document Type and Number:
Japanese Patent JP3086991
Kind Code:
B2
Abstract:
PURPOSE:To To improve operability of a switch lever and a regulating member by preventing the occurrence of malfunction through separation of the switch lever from the regulating member for a forcing amount thereof. CONSTITUTION:A gear shifting knob 20 serving as a regulating member for a forcing amount is arranged on the forcing side of a switch lever 6. The gear shifting knob 20 has a rotary shaft 20a rotatably grasped by means of upper and lower covers. A discshaped operation plate 21 exposed to the outside of the upper and lower covers, a flange part 22 positioned on the back of the cover, and a half-moon-shaped plate 23 located further therebelow are integrally formed to the upper end of the rotary shaft 20a. Teeth 23a are formed in the outer periphery of the half-moon-shaped plate 23 and a position where the half-moon-shaped plate 23 is mounted on the rotary shaft 20a is caused not to coincide with the center of an arc of a circle but the half-moon-shaped rotary shaft is eccentrically mounted. Further, the flange part 22 has a side wall 22a chamfered in a polygonal shape. A rubber pin 35 adjoining to the flange part 22 is matched with the chamfered side wall 22a to form a detent, and rotation of the gear shift knob 20 is regulated in a given position.
Inventors:
Takuo Arakawa
Shinobu Yamaguchi
Shinobu Yamaguchi
Application Number:
JP7094493A
Publication Date:
September 11, 2000
Filing Date:
March 04, 1993
Export Citation:
Assignee:
Makita Corporation
International Classes:
B25F5/00; H01C10/50; H01H21/00; (IPC1-7): B25F5/00; H01C10/50; H01H21/00
Domestic Patent References:
| JP60196904A |
Attorney, Agent or Firm:
Yoshiki Ishida