JPH0288076U

JPH0288076U -

Info

Publication number: JPH0288076U
Application number: JP16886788U
Authority: JP
Priority date: 1988-12-26
Filing date: 1988-12-26
Publication date: 1990-07-12

Description

[Brief explanation of drawings]

第１図は実施例の消音型電磁弁の閉弁状態を示
す縦断面図、第２図は同じく開弁状態を示す縦断
面図、第３図は実施例に係わる電磁弁のソレノイ
ド・コイルの吸引力とリターン・スプリングの復
元力の関係を示す説明図、第４図は従来の電磁弁
のソレノイド・コイルの吸引力とリターン・スプ
リングの復元力の関係を示す説明図、第５図は従
来例の電磁弁の縦断面図、第６図は実施例に係わ
る固定磁極と可動磁極の諸態様を示す図、第７図
は第６図に示す諸態様における吸引力を示す図で
ある。２……ソレノイド・コイル、５……固定磁極、
６……可動磁極、７……弁体、８……リターン・
スプリング、９……凸部、１０……凹部。 FIG. 1 is a longitudinal sectional view showing the silenced solenoid valve according to the embodiment in the closed state, FIG. 2 is a longitudinal sectional view showing the valve in the open state, and FIG. 3 is a longitudinal sectional view showing the solenoid coil of the solenoid valve according to the embodiment. An explanatory diagram showing the relationship between the attraction force and the restoring force of the return spring. Figure 4 is an explanatory diagram showing the relationship between the attraction force of the solenoid coil of a conventional solenoid valve and the restoring force of the return spring. Figure 5 is an explanatory diagram showing the relationship between the attraction force of the solenoid coil of a conventional solenoid valve and the restoring force of the return spring. FIG. 6 is a longitudinal sectional view of the example electromagnetic valve, FIG. 6 is a diagram showing various aspects of the fixed magnetic pole and movable magnetic pole according to the example, and FIG. 7 is a diagram showing the attractive force in the various aspects shown in FIG. 6. 2...Solenoid coil, 5...Fixed magnetic pole,
6...Movable magnetic pole, 7...Valve body, 8...Return
Spring, 9... Convex portion, 10... Concave portion.

Claims

[Scope of utility model registration request]

A return spring that includes a fixed magnetic pole and a movable magnetic pole inside a solenoid coil, couples a valve body to an opposite end of the movable magnetic pole, and biases the valve body in a direction opposite to the attractive force of the solenoid coil. The electromagnetic valve is provided with a recess formed on one surface of the two magnetic poles facing each other, a protrusion that can be loosely fitted into the recess on the other surface, and a length of the recess that overlaps with the protrusion. The shape conditions of the concave portion and the convex portion are set so that the attractive force decreases in accordance with the change in the magnetic pole, and the return spring has spring characteristics that balance the attractive force before the movable magnetic pole contacts the fixed magnetic pole. Silent solenoid valve with