Title:
BEARING STRUCTURE OF AUTOMATIC-WINDING ROTARY WEIGHT
Document Type and Number:
Japanese Patent JP2016118393
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a bearing structure reducing a loss of wind-up efficiency in the thrust direction in the bearing of an automatic-winding rotary weight of a timepiece.SOLUTION: The bearing structure of an automatic-winding rotary weight of a timepiece, includes an outer ring 12 to which a hub 11 having a rotary weight is fixed; and inner rings 14 and 15 fixed to a train wheel receiver. The outer ring 12 or the hub 11 includes a rotary weight pinion 44 engaged with an intermediate wheel for transmitting rotational movement of the rotary weight to a drive energy source. A radial-side bearing between the inner ring and the outer ring 12, and a thrust-side bearing between the outer ring 12 and the train wheel receiver are separately provided.SELECTED DRAWING: Figure 4
Inventors:
TOKUNAGA DAISUKE
SHIMA RYOICHI
SHIMA RYOICHI
Application Number:
JP2014256195A
Publication Date:
June 30, 2016
Filing Date:
December 18, 2014
Export Citation:
Assignee:
CITIZEN HOLDINGS CO LTD
CITIZEN WATCH CO LTD
CITIZEN WATCH CO LTD
International Classes:
G04B5/18; F16C17/02; F16C17/04; F16C19/06; F16C19/10
Domestic Patent References:
| JPS311191B1 | ||||
| JPS49116170U | 1974-10-03 | |||
| JP2013185936A | 2013-09-19 | |||
| JP2011169469A | 2011-09-01 |
Foreign References:
| CH460639A | 1968-09-30 | |||
| EP1134626A1 | 2001-09-19 | |||
| WO2004020854A1 | 2004-03-11 |
Attorney, Agent or Firm:
Atsushi Aoki
Tetsuro Shimada
Shinji Mitsuhashi
Yasushi Ohashi
Kentaro Ito
Kazuo Maejima
Tetsuro Shimada
Shinji Mitsuhashi
Yasushi Ohashi
Kentaro Ito
Kazuo Maejima