JPS5938012Y2 - electromagnetic solenoid device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an electromagnetic solenoid device in which an armature is attracted by an electromagnetic solenoid.

First, a conventional electromagnetic solenoid device of this kind will be explained with reference to FIG.

In FIG. 1, an armature 3 is pivotally attached to a base 2 of an electromagnetic solenoid 1 through a pin 4. When a current is applied to the electromagnetic solenoid 1 to excite it, the armature 3 moves around the pin 4. be attracted.

Then, when the current is cut off, the armature 3 is pulled back to its original position away from the electromagnetic solenoid 1 by a return spring 7 interposed between the armature support body 5 and the fixing member 6.

By the way, in general, the attraction force of the electromagnetic solenoid 1 is inversely proportional to the square of the distance from the armature 3, so the force decreases rapidly as the armature 3 moves away.

On the other hand, the load of the spring 7 is directly proportional to the displacement, and the load of the spring 7 does not change much with respect to the attraction force caused by a change in the distance between the electromagnetic solenoid 1 and the armature 3.

Therefore, in order for the electromagnetic solenoid 1 to attract the armature 3 from a certain distance, it is necessary to resist the load of the return spring 7 and use a force greater than that.

When the armature 3 is attracted to the electromagnetic solenoid 1, there is almost no air gap between them, so they are in close contact with each other with a very large force.When the armature 3 is opened by cutting off the excitation current, Due to the influence of residual magnetic flux, it takes a certain amount of time until the attraction force of the electromagnetic solenoid 1 becomes less than the load of the return spring 7 and the armature 3 shifts to the return operation.

The present invention eliminates the drawbacks of the conventional ones mentioned above,
This device was developed with the aim of providing an electromagnetic solenoid device that allows the armature to return quickly, and the same polarity of a pair of permanent magnets approaches each other as the armature is attracted by the electromagnetic solenoid. be.

The present invention will be explained below with reference to an embodiment shown in FIG.

In FIG. 2, the configuration of the electromagnetic solenoid 1, pin 4, and armature 3 is the same as the conventional one, but it is distinctive in that permanent magnets 9 and 10 are used for return.

That is, a permanent magnet 9 is fixed to the fixed member 8, and another permanent magnet 10 that can come into contact with and separate from this permanent magnet 9 is fixed to the armature support member 5.
Since the poles 10 are fixed so that the same poles face each other, a repulsive force is generated here to realize the return operation of the amateur 3.

Like the attraction force of the electromagnetic solenoid 1, this force is inversely proportional to the square of the distance between the two, so that a quick return force corresponding to the operation of the electromagnetic solenoid 1 is provided.

As mentioned above, the electromagnetic solenoid device according to the present invention has the following features:
Since the same poles of the pair of permanent magnets are made to approach each other as the armature is attracted by the electromagnetic solenoid, there is no waste in the load relationship when the armature is attracted or released.
This provides excellent effects such as improved efficiency, increased operating speed, and reduced power consumption.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional electromagnetic solenoid device, and FIG. 2 is an explanatory diagram showing an embodiment of the electromagnetic solenoid device according to the present invention. 1...Electromagnetic solenoid, 3...Amateur, 7...
・Return spring, 9.10...Permanent magnet. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] An electromagnetic solenoid device characterized in that a pair of permanent magnets with the same polarity are brought close to each other by following the attracting operation of an armature by an electromagnetic solenoid.