JPS63137182U

JPS63137182U -

Info

Publication number: JPS63137182U
Application number: JP3006687U
Authority: JP
Priority date: 1987-03-02
Filing date: 1987-03-02
Publication date: 1988-09-09

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す断面図、第
２図、第３図はそれぞれ従来の電磁弁を示す断面
図、第４図は第３図のもののガイドを示す斜視図
、第５図は第３図のもののコアを示す斜視図であ
る。図中、１はヨーク、２はガイド、３はバルブシ
ート、３ａはバルブシート面、４は可動プランジ
ヤ、４ａはバルブ面、６はコイル、８はスプリン
グ、９はコア、２１は入力ポート、２２は出力ポ
ート、２３はドレインポート、３０はコア断面絞
り部である。尚、図中同一符号は同一又は相当部
分を示す。 FIG. 1 is a sectional view showing an embodiment of this invention, FIGS. 2 and 3 are sectional views showing conventional solenoid valves, FIG. 4 is a perspective view showing the guide of the one shown in FIG. 3, and FIG. The figure is a perspective view showing the core of FIG. 3. In the figure, 1 is a yoke, 2 is a guide, 3 is a valve seat, 3a is a valve seat surface, 4 is a movable plunger, 4a is a valve surface, 6 is a coil, 8 is a spring, 9 is a core, 21 is an input port, 22 23 is an output port, 23 is a drain port, and 30 is a core cross-section constriction portion. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

An excitation coil, a core constituting a magnetic circuit magnetized by the excitation coil, a movable plunger interposed in this magnetic circuit and having a valve portion formed at one end thereof, and arranged coaxially with the movable plunger. A solenoid valve that is cup-shaped and equipped with a valve seat with an input port formed on the outer cylindrical part and an output port formed on the bottom, and that opens and closes the oil passage between the input and output ports between the valve part of the movable plunger and the valve seat. A solenoid valve characterized in that a magnetic constriction portion (cross-sectional constriction portion) is provided in the middle of a magnetic path of the core that reaches the surface facing the movable plunger.