Title:
自転車用変速駆動装置
Document Type and Number:
Japanese Patent JP4145836
Kind Code:
B2
Abstract:
A front variable speed drive device 20, 120 is configured and arranged to electrically operate driving of a front derailleur by a shift cable. The front variable speed drive device 20, 120 comprises a case member 60, a motor drive mechanism 61, and a cable linking portion 62. The case member 60 is mounted on a hanger portion of a bicycle frame 102. The motor drive mechanism 61 is mounted on the case member 60, and has a revolving shaft 70. The cable linking portion 62 has a retaining portion 92 configured and arranged to retain a first end of the shift cable. The cable linking portion 92 is rotatably mounted on the revolving shaft 70, and has a hypothetical arm line AR extending in the direction perpendicular to the shift cable from the center of rotation O1 with a length of the hypothetical arm line AR changing depending on the rotation phase. Thus, motor torque required for shifting gears is reduced with a simple structure.
Inventors:
Nori Ichida
Kazuhiro Fujii
Kazuhiro Fujii
Application Number:
JP2004177331A
Publication Date:
September 03, 2008
Filing Date:
June 15, 2004
Export Citation:
Assignee:
SHIMANO INC.
International Classes:
B62K23/06; B62M9/122; B62M9/132; B62M11/06; B62M25/08
Domestic Patent References:
| JP4358989A | ||||
| JP5319357A | ||||
| JP53104825U | ||||
| JP64045930A | ||||
| JP60047842U |
Attorney, Agent or Firm:
Shinki Global IP Patent Corporation
Yukio Ono
Hidetada Kato
Yukio Ono
Hidetada Kato