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Title:
ACTUATOR DEVICE FOR SHIFTING GEARS OF BICYCLE, AND NUT USED IN THE ACTUATOR
Document Type and Number:
Japanese Patent JP2012121566
Kind Code:
A
Abstract:

To provide an actuator device which has a system protected effectively from impact and is simple in structure and small in size.

There are included: an action/motion mechanism 101 which changes its shape to move a derailleur for gear shifting; a drive member 120 which controls the shape-changing by the action/motion mechanism 101; a nut 10 which is connected to the action/motion mechanism 101 and to a drive shaft 122 of the drive member 120; and a snap mechanism. In a first operation mode, the snap mechanism holds the nut 10 in a state of engagement with the drive shaft 122 so that the rotation of the drive shaft 122 causes the action/motion mechanism 101 to change its shape; and when the actuator device 100 is subjected to a force exceeding a given value, the snap mechanism sets the nut 10 to a release mode so that the action/motion mechanism 101 does not change its shape even if the drive shaft 122 rotates.


Inventors:
CAPOGNA ANDREA
Application Number:
JP2011268541A
Publication Date:
June 28, 2012
Filing Date:
December 08, 2011
Export Citation:
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Assignee:
CAMPAGNOLO SPA
International Classes:
B62M25/08; F16H25/20
Domestic Patent References:
JPH07257472A1995-10-09
JP2005239149A2005-09-08
JPH05338581A1993-12-21
JP2004001728A2004-01-08
JPH0369843A1991-03-26
JP2005053480A2005-03-03
Attorney, Agent or Firm:
Shuji Sugimoto
Masashi Noda
Kenro Tsutsumi
Kenichi Nakata
Daisuke Kaneko



 
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