JPS5926573Y2 - electromagnetic device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an electromagnetic device used in a solenoid valve.

Conventionally, in an electromagnetic device as disclosed in Japanese Utility Model Application Publication No. 53-32349, which has a manual pressing body made of an elastic material that manually operates a movable iron core in the suction direction, it is difficult to engage the manual pressing body or to manufacture a stop member by press molding. Also, it has drawbacks such as being troublesome to install and not easy to manufacture.

The present invention solves these drawbacks and provides an electromagnetic device that can be easily manufactured by easily attaching a manual pressing member.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

1 is a coil bobbin in which both ends of the cylindrical part protrude toward the outer circumference and flanges are formed at both ends; 2 is a coil wound around the outer periphery of the coil bobbin 1; 3 is a cylindrical part with a shaft part that fits into the cylindrical part of the coil bobbin 1; A fixed core 6 has one end fixed to the outer end of the collar 4 of the fixed core 3 to form a collar 4 and a through hole 5 in the shaft. It is a cylindrical core disposed in the electromagnetic body A, and is integrally molded with synthetic resin so that the lead wire 7 of the coil 2 is led out to the outside.

Reference numeral 8 denotes a movable iron core in which a shaft portion is fitted into a cylindrical portion facing the fixed iron core 3 of the coil bobbin 1, and a flange portion is formed in which the end of the shaft portion protruding from the cylindrical portion extends in the outer circumferential direction to reach the end of the core 6; 9
is a cover that is attached to the movable core 8 side end of the electromagnetic body A so as to cover the flange of the movable core 8, and is connected to the electromagnetic body B by two bolts 10 that pass through the cover 9 and the electromagnetic body A. Fix it.

Reference numeral 11 has a large diameter flange 14 and a small diameter flange 15 on the outer periphery as a clamping part that clamps the peripheral wall 13 of a through hole 12 formed by penetrating the cover lid 9 in the moving direction of the movable iron core 8. It is a manual pressing body having a pressing part in the center so as to be movable in the moving direction of the movable iron core 8, and is made of an elastic material such as synthetic rubber.

The manual pressing body 11 elastically deforms the small diameter collar 15 to open the through hole 12.
The large-diameter collar 14 and the small-diameter collar 15 sandwich the peripheral wall 13 around the opening of the through-hole 12 from the inner and outer surfaces, and are attached to the cover lid 9.

16 is a sealing material interposed between the electromagnetic main body A and the cover 9;
17 is a push rod fitted to the movable iron core 8, 18 is a spool,
19 is a spring.

With the above configuration, when the coil 2 is not energized, the spool 18 and the movable iron core 8 are in the illustrated position returned by the spring 19.

When the coil 2 is energized, the movable iron core 8 is attracted to the fixed iron core 3 side, and the spool 18 is pressed against the spring 19 via the push rod 17.

Next, when the coil 2 is de-energized, the movable core 8 instantly returns to the position shown in the figure due to the spring 19, impacts the large-diameter collar 14 of the manual pusher 11, and stops. It is made of an elastic material that absorbs the impact when it comes into contact, and effectively prevents noise and damage.
The manual pressing body 11 does not fall off from the through hole 12 during contact.

The manual pressing body 11 can be operated by pressing the central pressing portion to easily deform the thin wall portion and press the movable iron core.

The present invention can also be applied to a three-position valve in which electromagnetic devices are installed on both sides of the solenoid valve body, and can also be applied to an electromagnetic body whose fixed core is made of a C-shaped laminate.

As described above, according to the present invention, the manual pressing body has a clamping part formed on the outer periphery of the manual pressing body so as to clamp the peripheral wall around the opening of the through hole in the cover lid from the inside and outside, and the manual pressing body is held in the clamping part. By being attached to the cover lid, the manual pressing body can be easily attached, the number of parts can be reduced, and the electromagnetic device can be manufactured easily.

In addition, by making the movable iron core abut against the clamping part of the manual pusher located inside the cover, it is possible to reliably prevent the manual pusher from falling out of the through hole when it comes into contact, and it is possible to prevent the manual pusher from falling out of the through hole for a long time. It has the advantage that the movement of the movable iron core in the anti-adsorption direction can be effectively stopped and regulated without impact, and noise generation and damage can be effectively prevented.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a solenoid valve showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line ■■-I■ in FIG. A: Electromagnetic body, 2: Coil, 3
...Fixed iron core, 8...Movable iron core, 9.
...Cover lid, 11...Manual pressing body, 12
......Through hole.

Claims (1)

[Scope of utility model registration request] An electromagnetic body that is integrally formed by molding a coil bobbin around which a coil is wound, a fixed iron core whose shaft part is fitted into the cylindrical part of the coil bobbin, and a core whose one end is fixed to the fixed iron core and placed around the outer periphery of the coil, molded with synthetic resin. , a movable core that is movably attached to the electromagnetic body so as to be attracted and moved toward the fixed core when the coil is energized; It has a cover lid having a through hole, a pressing part in the center so as to be movable in the moving direction of the movable iron core, and a clamping part formed on the outer periphery to clamp the peripheral wall around the opening of the through hole from the inner and outer surfaces. and a manual pressing body formed from an elastic material that is attached to the cover lid, and the movable iron core is brought into contact with the clamping part of the manual pressing body located inside the cover lid to move the movable iron core in the anti-adsorption direction. Electromagnetic devices that are regulated.