JPH05303933A - Low action noise type electromagnetic relay - Google Patents

Abstract

PURPOSE:To reduce impact noise generated by collision of an armature with an iron core by providing a compression spring between a lower-end end surface of the iron core supported by a throughhole provided in an L-letter shaped yoke and a coil bobbin to slide freely in the axial direction and a base. CONSTITUTION:An electromagnet 2 composed of a coil 22 wound around a coil bobbin 21, an iron core 23 penetrating the bobbin 21, and an L-letter shaped yoke 24 is installed to an insulation base. The iron core 23 has a flange 26 which is larger than a throughhole 25 provided at a protruding part from the bobbin 21, and it is supported by a throughhole 25 and a throughhole 27 provided in the yoke 24 to slide freely in the axial direction. In the meanwhile, an armature 4 facing an end surface of the iron core 23 is rivetted by a rivet 31 at a center to a movable contact spring 3 to face the armature 4 to an end surface of the yoke 24, and the movable contact spring 3 is rivetted to a side surface of the yoke by a rivet 32. A compression spring 5 is provided between a lower-end end surface of the iron core 23 and the base.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexure type electromagnetic relay provided with means for reducing the sound of an armature colliding with an iron core during operation.

In a flexure type electromagnetic relay, an armature is swingably attached to a yoke of an electromagnet through a movable contact spring or the like, and when the coil of the electromagnet is energized, one end of the armature comes to the end face of the yoke. The other end of the armature is magnetically attracted to the end surface of the iron core.

In such an electromagnetic relay, the magnetically attracted armature comes into contact with the end face of the yoke or the end face of the iron core at a high speed and produces an impact sound. The gap between the armature and the yoke is extremely small and the impact noise is comparatively small, but the gap between the armature and the iron core is wide, and a large impact noise is generated when they come into contact with each other.

However, an electromagnetic relay incorporated in an audio device, a vehicle-mounted device or the like is required to have a low impact sound generated during operation. Therefore, there is a demand for the development of an electromagnetic relay equipped with means capable of reducing the impact noise generated when the armature collides with the iron core during operation.

[0005]

2. Description of the Related Art FIG. 3 is a side sectional view showing a main part of a conventional electromagnetic relay. In the figure, in the conventional flexure type electromagnetic relay, an electromagnet 2 is mounted on an insulating base 1 made of resin or the like, and the electromagnet 2 is wound around a coil bobbin 21 and an iron core 23 penetrating the coil bobbin 21. And L
It is composed of a letter-shaped yoke.

The iron core 23 has a flange 26 whose outer diameter is larger than the through hole 25 provided in the coil bobbin 21 at the portion protruding from the coil bobbin 21, and the lower end of the iron core 23 is a portion parallel to the end surface of the coil bobbin 21 of the yoke 24. It is crimped after it is inserted into the through hole 27 provided in the.

Further, the armature 4 facing the end face of the iron core 23 is riveted to the movable contact spring 3 at the center by a rivet 31, and the movable contact spring is placed after the armature 4 faces the end face of the yoke 24. 3 is riveted to the side of the yoke 24 with rivets 32.

That is, the armature 4 is riveted to the tip of a portion of the yoke 24 parallel to the iron core 23 through the movable contact spring 3 so that the armature 4 can be swung freely. Magnetically attracted to the end face of the yoke 24, and the other end of the armature 4 is an iron core.
It is magnetically attracted to the end face of 23.

[0009]

SUMMARY OF THE INVENTION In an electromagnetic relay incorporated in an audio device, a vehicle-mounted device, etc., it is required to reduce the impact noise generated during operation. However, in the conventional electromagnetic relay, the magnetically attracted armature comes into contact with the end face of the yoke or the end face of the iron core at a high speed and makes an impact sound.

Therefore, as a means for reducing the impact sound leaking to the outside, measures such as doubling the cover covering the outside are taken. However, in the electromagnetic relay which is required to be downsized, the outer shape is doubled. There is a problem that it becomes large and the miniaturization is impaired.

An object of the present invention is to provide an electromagnetic relay capable of reducing the impact noise generated by the armature colliding with the iron core during operation without increasing the outer shape.

[0012]

FIG. 1 is a side sectional view showing a main part of an electromagnetic relay according to the present invention. Note that the same object is denoted by the same symbol throughout the drawings.

The above problem is composed of a coil wound around a coil bobbin, an iron core penetrating the coil bobbin, and an L-shaped yoke, and the lower end of the iron core penetrating the coil bobbin is fitted into a through hole provided in the yoke. And an electromagnet that is magnetically coupled to the movable contact spring, and an armature that is riveted to the movable contact spring and attached to the portion parallel to the iron core of the yoke via the movable contact spring. In the electromagnetic relay in which the parallel portions and the end surfaces of the coil bobbins are supported by the base, the iron core 23 has a through hole 27 formed in the L-shaped yoke 24.
And a coil bobbin 21 slidably supported in the axial direction, and a compression spring 5 is interposed between the lower end surface of the iron core 23 and the base 1 to achieve the low operation noise type electromagnetic relay of the present invention. .

[0014]

In FIG. 1, the core is slidably supported in the axial direction by the through hole and the coil bobbin provided in the L-shaped yoke, and the compression spring is interposed between the lower end surface of the core and the base. The impact sound during operation is absorbed by the compression spring.

That is, it is possible to realize an electromagnetic relay capable of reducing the impact noise generated when the armature collides with the iron core during operation without increasing the outer shape.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 2 is a side sectional view showing another embodiment of the electromagnetic relay according to the present invention.

In FIG. 1, an electromagnetic relay according to an embodiment of the present invention has an electromagnet 2 mounted on an insulating base 1 made of resin or the like, and the electromagnet 2 is a coil 22 wound around a coil bobbin 21 and a coil bobbin. It is composed of an iron core 23 penetrating 21 and an L-shaped yoke 24.

The iron core 23 has a flange 26, which has an outer diameter larger than the through hole 25 provided in the coil bobbin 21, at a portion protruding from the coil bobbin 21, and is provided in the through hole 25 and the yoke 24 provided in the coil bobbin 21. It is movably supported in the axial direction by a through hole 27.

On the other hand, the armature 4 facing the end surface of the iron core 23 is riveted to the movable contact spring 3 at the center by a rivet 31, and the movable contact spring is placed after the armature 4 is opposed to the end surface of the yoke 24. 3 is riveted to the side of the yoke 24 with rivets 32.

That is, the armature 4 is riveted to the tip of a portion of the yoke 24 parallel to the iron core 23 through the movable contact spring 3 so that the armature 4 can swing freely. Magnetically attracted to the end face of the yoke 24, and the other end of the armature 4 is an iron core.
It is magnetically attracted to the end face of 23.

A compression spring 5 is mounted between the iron core 23, which is axially slidably supported by the through hole 25 and the through hole 27, and the base 1, and when not operating, the compression spring 5 shown in FIG. As shown in a), the end face of the iron core 23 facing the armature 4 is lifted by the action of the compression spring 5.

When the coil 22 of the electromagnet 2 is energized, the armature 4 is brought into contact with the end surface of the iron core 23 as shown in FIG. 1 (b).
Is magnetically attracted to the iron core 23, and the iron core 23 is pushed to a regular position against the force of the compression spring 5 by the force of bringing the armature 4 into close contact with the end surface of the iron core 23.

During operation, an impulsive sound is generated between the contact of the armature with a part of the iron core and the contact of the armature with the end face of the iron core. The iron core is configured to move against the force of the spring, and the impact force is absorbed by the compression spring 5.

As described above, the core is slidably supported in the axial direction by the through hole and the coil bobbin provided in the L-shaped yoke, and the compression spring is interposed between the lower end surface of the core and the base. The impact sound during operation is absorbed by the compression spring.

That is, it is possible to realize an electromagnetic relay capable of reducing the impact noise generated when the armature collides with the iron core during operation without increasing the outer shape. In another embodiment of the electromagnetic relay according to the present invention, as shown in FIG. 2, an electromagnet 2 is mounted on a base 1 made of resin or the like, and the electromagnet 2 is a coil 22 wound around a coil bobbin 21 and a coil bobbin 21. It is composed of an iron core 23 and an L-shaped yoke 24 penetrating through.

The iron core 23 has a flange 26 whose outer diameter is larger than the through hole 25 provided in the coil bobbin 21 at the portion protruding from the coil bobbin 21, and the lower end of the iron core 23 is a portion parallel to the end surface of the coil bobbin 21 of the yoke 24. It is crimped after it is inserted into the through hole 27 provided in the.

The armature 4 facing the end face of the iron core 23 is riveted at its center to the movable contact spring 3 by a rivet 31, and after the armature 4 is opposed to the end face of the yoke 24, the movable contact spring 3 is moved. 3 is riveted to the side of the yoke 24 with rivets 32.

However, unlike the conventional electromagnetic relay, a spacer 33 is interposed around the rivet 31 when riveting, and a space is provided between the movable contact spring 3 and the armature 4 except for the rivet tightening region. The transmission of impact sound to the contact spring 3 is blocked.

As described above, when the rivet is tightened, the spacer is provided around the rivet and the space is provided between the movable contact spring and the armature, so that the transmission of the impact sound to the movable contact spring is blocked and the external force is passed through the movable contact spring. It is possible to reduce the impact sound transmitted to the.

That is, it is possible to realize an electromagnetic relay capable of reducing the impact noise generated when the armature collides with the iron core during operation without increasing the outer shape.

[0031]

As described above, according to the present invention, it is possible to provide an electromagnetic relay capable of reducing the impact noise generated when the armature collides with the iron core during operation without increasing the outer shape.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a main part of an electromagnetic relay according to the present invention.

FIG. 2 is a side sectional view showing another embodiment of the electromagnetic relay according to the present invention.

FIG. 3 is a side sectional view showing a main part of a conventional electromagnetic relay.

[Explanation of symbols]

 1 base 2 electromagnet 3 movable contact spring 4 armature 5 compression spring 21 coil bobbin 22 coil 23 iron core 24 yoke 25 through hole 26 flange 27 through hole 31, 32 rivet 33 spacer

Front page continued (72) Inventor Toshihiro Furukawa 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor Keiji Ikeda 1015, Kamedotachu, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited

Claims (2)

[Claims] 1. A coil wound around a coil bobbin, an iron core penetrating the coil bobbin, and an L-shaped yoke, the lower end of the iron core penetrating the coil bobbin being provided in the yoke. An electromagnet fitted in a hole and magnetically coupled to the movable contact spring; and an armature attached to a portion of the yoke that is parallel to the iron core through the movable contact spring and is riveted. In an electromagnetic relay in which a portion of the yoke parallel to the end surface of the coil bobbin and the end surface of the coil bobbin are supported by a base, the iron core (23) has a through hole (27) provided in the L-shaped yoke (24) and A coil bobbin (21) is axially slidably supported, and a compression spring (5) is interposed between the lower end face of the iron core (23) and the base (1). Low operating noise type electromagnetic relay. 2. A coil wound around a coil bobbin, an iron core penetrating the coil bobbin, and an L-shaped yoke, and a lower end of the iron core penetrating the coil bobbin is provided in the yoke. An electromagnet fitted in a hole and magnetically coupled to the movable contact spring; and an armature attached to a portion of the yoke that is parallel to the iron core through the movable contact spring and is riveted. In an electromagnetic relay in which a part of the yoke parallel to the end surface of the coil bobbin and the end surface of the coil bobbin are supported by a base, when the armature (4) is riveted to the movable contact spring (3), the circumference of the rivet (31) A spacer (33) on the
A low operating noise type electromagnetic relay characterized in that a space is provided between the movable contact spring (3) and the armature (4).