Title:
RING SUPPORT STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2019/176983
Kind Code:
A1
Abstract:
This ring support structure suppresses left-right swinging and deviation of a lower ring linked to an upper ring, so as to cause the front-back direction oscillation of the lower ring relative to the upper ring to continue smoothly. The ring support structure comprises an upper ring (2) having a circumferential direction circular arc section (2b) at a lower end section (2a), and comprises a lower ring (3) that is linked to the upper ring (2) and swingably supported by the circular arc section (2b) of the upper ring (2). The inner circumferential surface of an upper end section (3a) of the lower ring (3) is supported on both sides in the ring width direction by the inner circumferential surface of the circular arc section (2b) of the upper ring (2), and a curved surface section (2c) is formed in the ring width direction on the inner circumferential surface of the circular arc section (2b) of the upper ring (2) such that the inner circumferential surfaces on both sides in the ring width direction of the lower ring (3) are in point contact with this curved surface section (2c).
Inventors:
MORIYAMA ISAMU (JP)
Application Number:
PCT/JP2019/010168
Publication Date:
September 19, 2019
Filing Date:
March 13, 2019
Export Citation:
Assignee:
THINK CO LTD (JP)
International Classes:
A44C25/00; A44C7/00
Foreign References:
| JP2008093324A | 2008-04-24 | |||
| JP6257118B1 | 2018-01-10 | |||
| JP2018027178A | 2018-02-22 | |||
| JP2005058371A | 2005-03-10 |
Attorney, Agent or Firm:
ASAKAWA Tetsu (JP)
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