JPS6353862U

JPS6353862U -

Info

Publication number: JPS6353862U
Application number: JP1986148438U
Authority: JP
Priority date: 1986-09-27
Filing date: 1986-09-27
Publication date: 1988-04-11

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す部分破断側面
図、第２図は同部分拡大断面図、第３図は同作動
説明図、第４図は従来例を示す断面図である。符号の説明、１０……マスタシリンダ、１１…
…シリンダボデイ、１１ａ……内孔、１２……ピ
ストンガイド、１２ａ……凹所、１３……ピスト
ン、１４……シールリング、１４ａ……ベース部
、１４ｂ……内側リツプ、１４ｃ……外側リツプ
、１４ｅ……突起。 FIG. 1 is a partially broken side view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the same portion, FIG. 3 is an explanatory view of the same operation, and FIG. 4 is a sectional view showing a conventional example. Explanation of symbols, 10...Master cylinder, 11...
... Cylinder body, 11a ... Inner hole, 12 ... Piston guide, 12a ... Recess, 13 ... Piston, 14 ... Seal ring, 14a ... Base part, 14b ... Inner lip, 14c ... Outer lip , 14e...protrusion.

Claims

[Scope of utility model registration request]

A seal made of an elastic material, comprising an annular base portion, an annular inner lip extending from the inner periphery of the base portion toward the front inner periphery, and an annular outer lip extending from the outer periphery of the base portion toward the front outer periphery. By fitting and fixing the ring together with an annular piston guide provided at the back of the seal ring into the inner hole of the cylinder body, the outer lip is brought into pressure contact with the inner wall surface of the inner hole of the cylinder body, and the inner lip is pressed against the inner wall surface of the inner hole of the cylinder body. is fitted into the inner hole of the cylinder body so as to be slidable in the axial direction and is brought into pressure contact with the outer peripheral surface of the piston guided by the piston guide, so that the inner wall of the inner hole of the cylinder body and the outer periphery of the piston In the sealing structure of the cylinder, the space between the cylinders is sealed by the seal ring, wherein a protrusion projecting rearward (or a recess opening rearward) is formed on the inner periphery of the back of the base portion of the seal ring. At the same time,
A recess (or a protrusion projecting forward) that opens forward is formed on the front surface of the piston guide, so that the two fit together with a radial interference. The seal structure of the cylinder.