JPS6331089B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic plunger which prevents hammering sounds generated during operation.

An example of a conventional electromagnetic plunger is the one shown in FIG. 1 (NISSAN Service Bulletin No. 442 [published August 1981], p. 117). In the same figure, reference numerals 1 and 2 are solenoids whose relative positions are fixed, and plungers 3 and 4 are slidably inserted into these solenoids 1 and 2, respectively. Pieces 5 and 6 are provided integrally. Further, each plunger 3, 4 is connected by a connecting member 7.

However, such conventional electromagnetic plungers are equipped with a switch or the like at one end of the plungers 3, 4, and are opened and closed by the stroke of the plungers 3, 4. Since the structure was such that the plungers 3 and 4 were prevented from falling off by colliding with the end faces of the solenoid, the striking sound was loud when they collided, which caused the solenoid to resonate, resulting in noise to the outside of the solenoid. . In addition, the surface treatment surface is damaged and peeled off due to the collision, and as a result, rust occurs and the smooth sliding of the plungers 3 and 4 is impaired.
This was causing the electromagnetic plunger to malfunction.

The present invention has been made by focusing on such conventional problems, and by interposing an elastic material between the solenoid or the retaining piece and the plunger, the elastic material is inserted between the solenoid or the retaining piece and the plunger before the retaining piece collides with the solenoid. To provide an electromagnetic plunger that prevents the retaining piece from colliding with the solenoid by restricting the movement of the plunger through the solenoid.

Embodiments of the present invention will be specifically described below with reference to the drawings. Note that the same components as those shown in FIG. 1 are given the same reference numerals.

FIG. 2 shows an embodiment of the electromagnetic plunger. In the same figure, 8 and 9 are respective plungers 3 and 4.
A first stopper in the form of a flange protrudes from the end of the narrow diameter portion of the stopper, and elastic bodies 10 and 11 as cushioning materials made of resin, paper, rubber, etc. are brought into contact with the stoppers 8 and 9 as shown in the figure. There is.

For an electromagnetic plunger with such a configuration,
For example, if a current is applied to one solenoid 1 to energize it, the plunger 3 will be activated as shown in Figure 2.
is pulled to the left, so the plunger 4 connected to it via the connecting member 7 also moves to the left,
Before the retaining piece 5 contacts the solenoid 1, the first
The stopper 9 connects the solenoid 2 via the elastic body 11.
is pressed against the right side of the

That is, when the solenoid 2 is pressed through the elastic body 11, a gap δ (>0) is created between the solenoid 3 and the retaining piece 5. In this case, the right side of the solenoid 2 acts as a second stopper, which will be described later, and is not applied with any urging force.

A similar operation occurs when solenoid 2 is energized, in which case solenoid 1 acts as a second stop. In this way, the respective retaining pieces 5 and 6 are prevented from hitting the solenoids 1 and 2, and generation of tapping sounds and peeling of the surface treatment are effectively prevented.

FIG. 3 shows another embodiment of the invention. This differs from the one shown in FIG. 2 in that elastic bodies 10a, 11a are attached by pasting or the like to the sides of the solenoids 1, 2 facing the respective first stoppers 8a, 9a. Also in this case, when the solenoid 1 is energized, the first stopper 9a is
a, so that the solenoid 2 acts as a second stopper, and at this time, a gap δ is created between the solenoid 1 and the retaining piece 5. A similar operation occurs when solenoid 2 is energized.

FIG. 4 shows yet another embodiment. This is the second
Similar to the figure, non-metallic plates such as resin, paper,
Cushioning materials 10b, 11b made of rubber or the like are inserted between first stoppers 8b, 9b of each plunger 3, 4 and solenoids 1, 2. Even in such an embodiment, the same effect as in the above embodiment,
It is effective.

FIG. 5 also shows another embodiment. This is a U-shaped holder 12, 1 on the outer surface of each solenoid 1, 2.
3 protrudingly provided, and an elastic body 10 is provided on the side surface of the holders 12, 13 facing the end surfaces of the narrow diameter portions of the plungers 3, 4.
c, 11c is attached.

In such an electromagnetic plunger, for example, when one solenoid 1 is energized, the plungers 3 and 4 are pulled to the left, but before the retaining piece 5 contacts the solenoid 1, as shown in FIG. As shown,
The end face of the narrow diameter portion of the plunger 3 abuts against the elastic body 10c, and together with the holder 2, the movement of the plunger 3 is restricted. Therefore, the retaining piece 5 and the solenoid 1 are prevented from colliding with each other, and no hammering noise is generated between them. In this case, the end face of the narrow diameter part of the plunger 3 acts as the first stopper, and the holder 2 acts as the second stopper, so as shown in FIGS. 2 to 4, there is no need to use a pair of electromagnetic plungers.
It can prevent the banging sound of the electromagnetic plunger.

FIG. 6 shows yet another embodiment. This seat plate 14, 1 is attached to the narrow diameter end of the plunger 3, 4.
5 are integrally provided, and elastic bodies 10d and 11d are integrally attached to the outer surfaces of the seat plates 14 and 15.

In such an electromagnetic plunger, similarly to the one shown in FIG. 5, each solenoid 1, 2 and the retaining piece 5, 6. This prevents the occurrence of tapping sounds.

Further, as in each of the above embodiments, the solenoid 1,
2 and the retaining pieces 8 and 9 on the sides that do not face each other,
By interposing an elastic body between one surface of the solenoids 1, 2 or the retaining pieces 8, 9 and the plunger, compared to the case where an elastic body is interposed between the solenoids 1, 2 and the retaining pieces 8, 9, Therefore, even if the thickness of the elastic body is increased to effectively prevent hitting noise, the stroke amount of the plunger does not decrease.

As explained above, according to the present invention, in an electromagnetic plunger in which a retaining piece is provided protruding from a plunger that slides in a solenoid, the solenoid or retaining piece is located on the side where the solenoid and the retaining piece do not face each other. a buffer material disposed between one surface and the plunger; a first stopper fixed to the plunger such that the elastic body is movable in the moving direction of the plunger when the solenoid is activated; and the retaining piece and the solenoid. By configuring the electromagnetic plunger with a second stopper fixed to the solenoid so as to come into contact with the elastic body before contacting the solenoid, the retaining piece is prevented from colliding with the solenoid, so that the stopper is prevented from colliding with the solenoid. The hammering sound that previously occurred is gone,
Radiated noise to the outside can be eliminated. Furthermore, since the collision is prevented, the surface treatment parts of the solenoid and the retaining piece are not damaged, and therefore malfunctions due to rust etc. can be effectively prevented and the stroke amount of the plunger can be reduced. Therefore, effects such as being able to increase the thickness of the elastic body can be obtained.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional electromagnetic plunger, Figure 2 is a front view of a conventional electromagnetic plunger.
3, 4, 5 and 6 are front views of respective embodiments of the electromagnetic plunger according to the present invention. 1, 2... Solenoid, 3, 4... Plunger, 5, 6... Retaining piece, 8, 9, 14, 15...
...first stopper, 10, 10a, 10b, 10
c...Cushioning material, 11, 11a, 11b, 11c...
...Buffer material, 12, 13...Second stopper.

Claims (1)

[Claims] 1. In an electromagnetic plunger in which a retaining piece protrudes from a plunger that slides in a solenoid, the solenoid and retaining piece are arranged between one surface of the solenoid that does not face each other, or one surface of the retaining piece and the plunger. a buffer material; a first stopper fixed to the plunger so that the buffer material can be moved in the direction of movement of the plunger when the solenoid is actuated; and a first stopper that contacts the buffer material before the solenoid contacts the retaining piece. and a second stopper fixed to the solenoid.