JPS5943038U

JPS5943038U - pressure switch

Info

Publication number: JPS5943038U
Application number: JP14039182U
Authority: JP
Inventors: 真澄林; 古野　健人
Original assignee: カヤバ工業株式会社
Priority date: 1982-09-16
Filing date: 1982-09-16
Publication date: 1984-03-21
Also published as: JPS6350759Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のプレッシャスイッチをオイルポンプ本体
と共に示す断面図、第２図イは本考案の実施例に係るプ
レッシャスイッチをオイルポンプ本体と共に示す断面図
、第２図咀よ本考案の実施例に係るピストンロッドの他
の実施例を示す一部切截断面図、第３図イ９口およびハ
は本考案の他の実施例に係るピストンロッドを示す断面
図である。１０・・・本体、２０・・・ピストンロッド、２１・・
・摩擦部材、２２・・・突出部、３０・・・プランジャ
、４０・・・スプリング、５０・・・ターミナル。Fig. 1 is a sectional view showing a conventional pressure switch together with an oil pump main body, Fig. 2 A is a sectional view showing a pressure switch according to an embodiment of the present invention together with an oil pump main body, and Fig. 2 is an embodiment of the present invention. FIG. 3 is a partially cutaway sectional view showing another embodiment of the piston rod according to the present invention. FIGS. 3A and 3B are sectional views showing a piston rod according to another embodiment of the present invention. 10...Main body, 20...Piston rod, 21...
-Friction member, 22...Protrusion, 30...Plunger, 40...Spring, 50...Terminal.

Claims

[Scope of utility model registration request]

(1) A piston rod slidably housed inside the body, a plunger slidably housed adjacent to the piston rod inside the body, and a spring that presses the plunger in the backward direction with a constant repulsive force. , a terminal attached to the main body at an appropriate distance from the end face of the plunger, and a piston rod that slides in the forward direction with appropriate hydraulic pressure overcomes the repulsive force of the spring and the plunger slides in the forward direction, and the end face A pressure switch in which a plunger slides in the backward direction due to the restoring force of a spring and its end face separates from the terminal when the plunger contacts the terminal and the appropriate oil pressure is released, in which a friction member is formed on the piston rod. .

(2) The pressure switch according to claim 1, wherein the friction member is a thin rubber film baked on all or part of the outer peripheral surface of the piston rod.

(3) The pressure switch according to claim 1, wherein the friction member is a cylindrical rubber member baked onto one end of the piston rod.

(4) The pressure switch according to claim 1, wherein the friction member is a spinning wheel-shaped rubber member baked onto one end of the piston rod.

(5) The pressure switch according to claim 1, wherein the friction member is a cylindrical rubber member fitted into a protrusion formed at one end of the piston rod.