Title:
POWER TRANSMITTING BODY OF CLOCK, AND METHOD OF MANUFACTURING POWER TRANSMITTING BODY OF CLOCK
Document Type and Number:
WIPO Patent Application WO/2016/143612
Kind Code:
A1
Abstract:
The objective of the present invention is to increase the resistance to damage of a securing part between an arbor and a power transmitting member in a power transmitting body of a clock, without increasing the number of components.
A transmission wheel (1) (an example of a power transmitting body) is provided with a gear (11) (an example of a power transmitting member) and a pinion (12) (an example of an arbor). A hole (11a) formed in a central portion of the gear (11) is a regular octagon centered about a center of rotation (C). An insertion portion (12c) formed on the pinion (12) is in the shape of a gear having gear-shaped tooth bottom (12d) parts and tooth tip (12f) parts. The hole (11a) and the insertion portion (12c) come into contact with one another at eight parts thereof in the circumferential direction around the center of rotation (C). The parts of the hole (11a) that are in front, in the clockwise direction (a specific direction of rotation) around the center of rotation (C), of the eight parts that are in contact are formed in such a way as to be further from the center of rotation (C) than are the eight parts that are in contact.
Inventors:
FUKUDA TADAHIRO (JP)
FUKAYA SHINPEI (JP)
ONO YOSHIKI (JP)
FUKAYA SHINPEI (JP)
ONO YOSHIKI (JP)
Application Number:
PCT/JP2016/056289
Publication Date:
September 15, 2016
Filing Date:
March 01, 2016
Export Citation:
Assignee:
CITIZEN HOLDINGS CO LTD (JP)
CITIZEN WATCH CO LTD (JP)
CITIZEN WATCH CO LTD (JP)
International Classes:
G04B13/02
Foreign References:
| JPH11194177A | 1999-07-21 | |||
| JP2012229723A | 2012-11-22 | |||
| JPH01172607A | 1989-07-07 | |||
| JP2009528524A | 2009-08-06 |
Other References:
See also references of EP 3270235A4
Attorney, Agent or Firm:
NISHIWAKI, Tamio (JP)
Tamio Nishiwaki (JP)
Tamio Nishiwaki (JP)
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