To suppress the occurrence of wear and stress concentration due to an interference between both a coiled spring 10 and a retainer 20 without increasing a clearance between the guide part 21 of the retainer and the coiled spring.
A seat face 23 receiving the axial one end of the coiled spring 10 is formed on the flange part 22 of the retainer 20 assembled in a valve system 1. The first peripheral wind large diameter part 11 of the axial one end part of the coiled spring 10, into which the cylindrical guide part 21 of the retainer 20 is fitted, which faces the flange part 22 so as to be able to abut thereon is locally increased in diameter. The inner diameter R1 of the large diameter part 11 is set larger than the outer diameter R2 of the guide part 21, the inner diameter R3 of the small diameter part 12, and the maximum outer diameter R4 of a corner part 24.
| JPH0287909U | 1990-07-12 | |||
| JPH0231032A | 1990-02-01 | |||
| JPS5681241U | 1981-07-01 | |||
| JPS5142319U | 1976-03-29 | |||
| JPH01305110A | 1989-12-08 | |||
| JP2001303914A | 2001-10-31 |
Hiromichi Kobayashi
Tomioka Kiyoshi