JPH04118780U - Plunger type solenoid device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a plunger type solenoid device, and its purpose is to realize a plunger type solenoid device that can eliminate the compression of the closed space in the moving area of the plunger and cool the excitation coil. There is a particular thing. [Structure] A yoke 1 having a substantially E-shaped cross section and an open surface including the end face of the central core 2, and an excitation coil wound around the central core 2 portion of the yoke 1 and its extension direction via a bobbin 10. 4, a plunger 5 movably arranged on an extension of the central core 2 of the opening of the yoke 1 using the bobbin 10 as a guide, and a cover 8 attached to cover the opening surface of the yoke 1. and a spiral return spring 9, one end of which is attached to the surface of the cover 8 facing the yoke, and the other end of which is attached to the other end of the plunger 5. It is configured to form an air flow passage between the inner and outer surfaces 11 of.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a plunger type solenoid device, and more specifically, to a plunger type solenoid device. Concerning improvements and cooling of excitation coils.

0002

[Conventional technology]

As a wire dot device, in addition to the clapper type, the coil is excited with a pulsed current. Dot printing is performed by suctioning the wired plunger from a stationary position. After printing, the plunger type solenoid is configured to return to the resting position using a return spring. Those with a noid structure are also widely used.

0003 Figure 4 is a configuration diagram showing an example of such a conventional plunger type wire dot device. It is. In the figure, 1 is a yoke, whose cross section is approximately E-shaped, with a center point. The surface including the end surface of A2 is open. The central core 2 portion of the yoke 1 and its extension An excitation coil 4 is wound around the bobbin 3 in this direction. 5 is plunger -, and the bobbin 3 is placed on the extension line of the central core 2 of the opening of the yoke 1 as a guide. It is arranged so that it can move in the reciprocating direction. Paired with the center core 2 of the plunger 5 One end of a wire 6 for dot printing is attached to the opposite end, and The other end is formed to protrude through the center core 2 of the yoke 1. The said Y A guide 7 is attached to the end surface of the yoke 1 from which the end of the yoke 6 protrudes. Yo A cover 8 is attached to the opening surface of the rack 1 so as to close the opening surface. the cover One end of a return spring 9 using a spiral spring is attached to the surface of 8 facing the yoke 1. The other end of the return spring 9 is attached to the other end of the plunger 5.

0004 In such a configuration, the plunger 5 is normally used when the excitation coil 4 is not excited. In this state, the cover 8 is pulled toward the cover 8 by the return spring 9 as shown in the figure. Excitation coil When current flows through the coil 4, the plunger 5 resists the pulling force of the return spring 9. It is magnetically attracted to the central core 2 of the yoke 1. As a result, the wire 6 is Record points.

[0005]

[Problem that the idea aims to solve]

However, according to the configuration shown in FIG. 4, the bobbin 3 that also serves as a guide and the plunger 5 is small, so the area surrounded by the center core 2, bobbin 3, and plunger 5 is It becomes a nearly sealed area, and when the plunger 5 is magnetically attracted to the central core 2, it is compressed. Ru. As a result, the settling time for plunger 5 to start and stop is long. As a result, the striking force of the wire 6 is significantly reduced. Also, the temperature of the excitation coil 4 is also This is not desirable from the standpoint of cooling the equipment.

[0006] This invention was made in view of these problems, and its purpose is to This eliminates the compression of the closed space in the moving area of the pump and cools the excitation coil. The purpose of this invention is to realize a plunger type solenoid device.

[0007]

[Means to solve the problem]

The plunger type solenoid device of this invention is a yoke having a substantially E-shaped cross section and an opening on a surface including the end surface of the central core; The central core part of the yoke and the excitation coil wound through the bobbin in the direction of its extension. and the bobbin as a guide on an extension of the center core of the opening of the yoke. A movably arranged plunger and a plunger mounted to cover the opening surface of the yoke. one end is attached to the surface facing the yoke of the cover and the other end is attached to the front. A plunger with a spiral return spring attached to the other end of the plunger. In a jar type solenoid device, An air flow passage is formed between the inner and outer surfaces of the bobbin.

[0008]

[Effect]

The air flow passage formed between the inner and outer surfaces of the bobbin becomes empty as the plunger moves. The air flows. The air flow compresses the closed space in the moving area of the plunger. The excitation coil is cooled down.

[0009]

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

0010 FIG. 1 is a block diagram showing one embodiment of the present invention, and the same parts as in FIG. I will omit their re-explanation. In the figure, 10 is the excitation coil 4 wound around. An example of the bobbin 10 is shown in FIG. 2. above the bobbin 10 The lower brim has a plurality of slits 11 to function as air flow passages between the inner and outer surfaces. It is formed.

[0011] FIG. 3 is a timing chart explaining the operation of FIG. Flow to excitation coil 4 When the pulse current rises as shown in (A), the plunger 5 moves as shown in (B). The wire 6 moves downward from the initial position a toward position b where the dot is recorded. do. The air compressed as the plunger 5 moves from a to b is transferred to the bobbin 10. The air flows in the forward direction as shown in (C) through the air flow path between the inner and outer surfaces. Then, the excitation When the pulse current flowing through the coil 4 falls, the plunger 5 is moved back to b by the return spring 9. is pulled back from position c to the initial position c. The plunger 5 moves from b to c. Accordingly, air flows in the negative direction through the air flow path between the inner and outer surfaces of the bobbin 10.

0012 This air flow in the positive direction synchronized with the movement of the plunger 5 in the direction of the impact point As the compressed air is released, the striking force of the wire 6 increases, and the plan The settling time of jar 5 is also reduced. And the forward air flow and plunge The excited coil is energized by sucking air in the negative direction in synchronization with the movement of the motor 5 to its initial position. The tube 4 is cooled and the temperature rise is suppressed. In other words, these air flows are actively A plunger type solenoid device with high overall efficiency can be realized by using can be expressed.

[0013] Note that in the above embodiment, the upper and lower ribs of the bobbin are provided to function as air flow passages. Although slits are provided, holes may be used, or slits and holes may be used in combination.

[0014] In addition, although the wire dot device was explained in the above embodiment, various types of plunge It can also be applied to a solenoid device.

[0015]

[Effect of the idea]

As described in detail above, according to the present invention, the following effects can be obtained.

[0016] Occurs due to the movement of the plunger in the air flow passage formed between the inner and outer surfaces of the bobbin. The air flow eliminates the compression of the enclosed space in the plunger movement area. At the same time, the excitation coil is cooled, resulting in an overall highly efficient plunger type solenoid. ide device can be realized.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an example of a bobbin used in FIG. 1.

FIG. 3 is a timing chart explaining the operation of FIG. 1;

FIG. 4 is a configuration diagram of an example of a conventional device.

[Explanation of symbols]

1 yoke 2 central core 4 Excitation coil 5 Plunger 6 wire 7 Guide 8 Cover 9 Return spring 10 bobbin 11 Slit (air flow path)

Claims (1)

[Scope of utility model registration request] 1. A yoke having a substantially E-shaped cross section and an open surface including the end face of the central core; an excitation coil wound around the central core portion of the yoke in an extending direction thereof via a bobbin; a plunger movably disposed on an extension of the center core of the opening of the yoke using the bobbin as a guide; a cover attached to cover the opening surface of the yoke; and one end connected to the yoke of the cover. In a plunger type solenoid device comprising a spiral return spring attached to an opposing surface and the other end attached to the other end of the plunger, an air flow passage is formed between the inner and outer surfaces of the bobbin. Features a plunger type solenoid device.