Title:
【発明の名称】スクリュードライバーにおけるクラッチ装置
Document Type and Number:
Japanese Patent JP3071563
Kind Code:
B2
Abstract:
A power driven screwdriver includes a clutch mechanism provided between a spindle (10) for mounting a driver bit (9) thereon and a drive member (7) rotatably driven by a motor. The clutch mechanism includes a protrusion (12) formed on one of the spindle (10) and the drive member (7) and a recess (8) formed on the other for engagement with the protrusion. The protrusion (12) includes a conical outer surface (12a) having a diameter decreasing toward the protrusion. The recess (8) includes a conical inner surface (8a) which corresponds substantially to the conical outer surface (12a) of the protrusion and has a diameter increasing toward the recess. The conical outer surface (12a) has a second central axis displaced from the first central axis of the Spindle (10) or the drive member (7) by a first distance. The conical inner surface (8a) has a third central axis displaced from the first central axis by a second distance.
Inventors:
Katsuhiko Sasaki
Application Number:
JP15450892A
Publication Date:
July 31, 2000
Filing Date:
May 20, 1992
Export Citation:
Assignee:
Makita Corporation
International Classes:
B25B21/00; B25B23/14; B25B23/155; B25B23/157; B25F5/00; F16D1/08; (IPC1-7): B25B21/00; B25B23/14; B25B23/157
Attorney, Agent or Firm:
Hidehiko Okada (2 outside)