Title:
COIL SPRING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/200483
Kind Code:
A1
Abstract:
The present invention comprises a body spring (11) and an insulator (12). The insulator is provided with a support groove (13) that extends around a coil axis (O) and into which the lower end of the body spring is fitted. The lower end of the body spring is bonded to the inner surface (13a) of the support groove. The inner surface of the support groove is provided with a plurality of spacer protrusions (14) that support the outer circumferential surface of a wire rod (W). The support groove extends over the angular range of 180-360° around the coil axis, and the ratio of the volume of the spacer protrusions to the gap between the inner surface of the support groove and the outer circumferential surface of the wire rod is larger in the center of the gap in the circumferential direction about the coil axis than in other parts of the gap.
Inventors:
SUWA TAISUKE (JP)
SHIBATA YUICHI (JP)
KOKUBUN IPPEI (JP)
SUGITANI TOMOYA (JP)
SHIBATA YUICHI (JP)
KOKUBUN IPPEI (JP)
SUGITANI TOMOYA (JP)
Application Number:
PCT/JP2021/012287
Publication Date:
October 07, 2021
Filing Date:
March 24, 2021
Export Citation:
Assignee:
NHK SPRING CO LTD (JP)
International Classes:
F16F1/12; F16F9/32
Foreign References:
| JP2019148273A | 2019-09-05 | |||
| JP2017015249A | 2017-01-19 | |||
| JP2015190538A | 2015-11-02 | |||
| US6398201B1 | 2002-06-04 | |||
| EP1128085A2 | 2001-08-29 | |||
| FR1341188A | 1963-10-25 | |||
| JP2020064642A | 2020-04-23 | |||
| JP2017015249A | 2017-01-19 |
Other References:
See also references of EP 4130507A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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