JPH03105776U

JPH03105776U -

Info

Publication number: JPH03105776U
Application number: JP1437990U
Authority: JP
Priority date: 1990-02-16
Filing date: 1990-02-16
Publication date: 1991-11-01

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案による逆止弁を示す縦断面図
、第２図はこの考案による逆止弁の他の実施例を
示す縦断面図、第３図は従来の逆止弁を示す縦断
面図である。１０，５０……逆止弁、１１，５１……ハウジ
ング、１２，５３……弁体、１３，５４……ガイ
ド、１４，５７……コイルばね、１５，１６，５
２……流体通路、１７，５５……弁口、１８，５
６……テーパ部、１９……球状部、２０……軸状
部、２１……薄膜部、２２……突起。 Fig. 1 is a longitudinal sectional view showing a check valve according to this invention, Fig. 2 is a longitudinal sectional view showing another embodiment of the check valve according to this invention, and Fig. 3 is a longitudinal sectional view showing a conventional check valve. It is a diagram. 10,50...Check valve, 11,51...Housing, 12,53...Valve body, 13,54...Guide, 14,57...Coil spring, 15,16,5
2...Fluid passage, 17,55...Valve port, 18,5
6...Tapered part, 19... Spherical part, 20... Axial part, 21... Thin film part, 22... Protrusion.

Claims

【実用新案登録請求の範囲】 (1) 流体通路１５，１６を有し、かつ、この流
体通路１５，１６中に弁口１７側の通路断面積が
漸次小さくなるテーパ部１８を有するハウジング
１１と、該ハウジング１１の流体通路１５中に挿
入され、流体の圧力に応じて弁口１７を開閉する
弁体１２と、この弁体１２を摺動自在に支持する
支持部材１３と、弁体１２を弁口１７側へ付勢す
る弾性体１４とを有する逆止弁において、前記弁
体１２の外周に、閉弁時にテーパ部１８と密着可
能な環状の薄膜部２１を膨出形成したことを特徴
とする逆止弁。 (2) 前記薄膜部２１と、その外周部に突起２２
が一体に設けられ、この突起２２が前記テーパ部
１８に密着するようになつている請求項１記載の
逆止弁。[Claims for Utility Model Registration] (1) A housing 11 having fluid passages 15 and 16, and a tapered portion 18 in which the passage cross-sectional area on the valve port 17 side gradually decreases; , a valve body 12 that is inserted into the fluid passage 15 of the housing 11 and opens and closes the valve port 17 according to the pressure of the fluid; a support member 13 that slidably supports the valve body 12; A check valve having an elastic body 14 that biases toward the valve port 17 side, characterized in that an annular thin film portion 21 is formed on the outer periphery of the valve body 12 to be in close contact with the tapered portion 18 when the valve is closed. check valve. (2) The thin film portion 21 and the protrusion 22 on its outer periphery.
2. The check valve according to claim 1, wherein the protrusion 22 is integrally provided and the protrusion 22 is in close contact with the tapered portion 18.