JPH06267389A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To prevent momentary opening of a contact or generation of noise both of which could be caused by malfunctioning of an armature while a coil is not excited. CONSTITUTION:A contact piece 3a is provided integrally with part of a moving contact spring 3. The stud 10a of an armature 10 which becomes free when a coil 7 is not excited is pressed by the contact piece 3a so as to secure the armature 10 to a yoke 9. Thereby malfunctioning of the armature 10 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay.

[0002]

2. Description of the Related Art A conventional electromagnetic relay is shown in FIGS.
As shown in FIG. 1, a core 8 around which the coil 7 is wound, an L-shaped yoke 9 connected to one end of the core 8, an armature 10 swingably locked to the other end of the L-shaped yoke 9, and an upper and lower pair. Fixed contact terminals 1 and 2, and one end thereof is pivotally supported by the support portion 4,
The other end has a movable contact spring 3 provided with movable contacts 12a and 12b for individually contacting the fixed contact terminals 1 and 2, respectively.

The armature 10 has an integrally formed insulating stud 10a, and the swing fulcrum of the armature 10 is pressed against the L-shaped yoke 9 by a rester spring 11.

The movable contact spring 3 has a force of pressing downward from itself by bending the tension, and the movable contact 12a is always brought into contact with the lower fixed contact terminal 2 by this spring force.

Next, the operation of the conventional example is shown in FIG.
An explanation will be given using (b). When the coil is not excited,
As shown in (a), the movable contact 12a of the movable contact spring 3 is in contact with the lower fixed contact terminal 2 and one movable contact 1
2b is separated from the upper fixed contact terminal 1.

When the coil 7 is excited here, FIG.
As shown in (b), the armature 10 is attracted to the core 8 and the stud 10a pushes up the movable contact spring 3,
In this case, the movable contact 12a has a lower fixed contact terminal 2
Then, the movable contact 12b on one side contacts the upper fixed contact terminal 1 to switch the contact.

[0007]

In the structure of the conventional electromagnetic relay, when the lower contact is closed, the armature is free to oscillate with respect to the movable contact spring, and therefore, when vibration or impact is applied. However, there is a problem in that the amateur swings to cause a malfunction, the contact is opened momentarily, or the contact is opened and closed instantaneously to generate noise.

An object of the present invention is to provide an electromagnetic relay in which the armature is prevented from malfunctioning by fixing the armature when the lower contact is closed.

[0009]

In order to achieve the above object, an electromagnetic relay according to the present invention is an electromagnetic relay in which an electromagnet mechanism and a contact switching mechanism are combined, and the electromagnet mechanism comprises:
The yoke has a yoke, a core, and an armature, and the yoke is an L-shaped structure composed of a combination of a long side portion extending in the lateral direction and a short side portion extending downward from an end of the long side portion, forming a magnetic circuit. The core has a coil wound around it, one end of which is attached to the short side of the yoke, and the other end of which extends laterally along the long side of the yoke has a magnetic pole for attracting the armature. , Bent at approximately the center, has an attracting part at one end and an insulating stud at the other end, and is supported so that it can be lifted up to the tip of the long side of the yoke with the bend as a fulcrum, and the attracting part is attracted to the magnetic pole of the core. The contact switching mechanism has a pair of fixed contact terminals and a movable contact spring, and the pair of fixed contact terminals are vertically spaced apart from each other to form a movable contact. The spring is pivotally supported at one end and between a pair of fixed contact terminals. It has a movable contact at the other end that is placed in contact with each fixed contact terminal individually, and also has a contact piece.The movable contact of the movable contact spring constantly contacts the lower fixed contact terminal by the spring force of the movable contact spring. However, the contact piece of the movable contact spring is pushed up by the insulating stud of the amateur and is switched to the fixed contact terminal on the upper side, and the movable contact of the movable contact spring contacts the fixed contact terminal on the lower side. The armature is pressed against and fixed to the yoke while it is in motion.

Further, the contact piece of the movable contact spring is provided so as to project to the side of the movable contact spring and extend in the length direction of the movable contact spring.

Further, the contact piece of the movable contact spring is provided inside the movable contact spring by punching.

The contact piece of the movable contact spring is formed in a wave shape and has a long effective length.

[0013]

When the lower contact is closed, the armature is pressed against and fixed to the yoke by the contact piece provided on a part of the movable contact spring. Therefore, the amateur remains in the state of being fixed to the yoke even when external vibration or shock is applied, and the malfunction of the amateur does not occur.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is an exploded perspective view showing an electromagnetic relay according to Embodiment 1 of the present invention, and FIG. 2 (a) shows a main part of the electromagnetic relay according to Embodiment 1 of the present invention. Plan view,
(B) is the same front view.

In the figure, the electromagnetic relay according to the present invention is
It consists of a combination of an electromagnet mechanism and a contact switching mechanism,
In FIG. 1, two sets of electromagnet mechanisms and contact switching mechanisms are provided in parallel in the base 6.

The electromagnet mechanism has a yoke 9, a core 8 and an armature 10. As shown in FIG. 2 (b), the yoke 9 has an L-shaped structure including a combination of a long side portion 9 a extending in the lateral direction and a short side portion 9 b extending downward from the end of the long side portion 9 a. It constitutes the circuit. As shown in FIG. 2B, the core 8 has a coil 7 wound around its outer periphery,
One end is attached to the short side portion 9b of the yoke 9, and the other end extending laterally along the long side portion 9a of the yoke 9 has a magnetic pole 8a for attracting the armature 10. As shown in FIG. 2B, the armature 10 is bent in a V shape at the substantially central portion, has an adsorbing portion 10b at one end and an insulating stud 10a at the other end, and has a bending portion 10c as a fulcrum. 9 is supported at the tip of the long side of the core 9 so that it can be lifted, and the suction portion 10b is attached to the core 8
The lift-off structure is structured such that the insulating stud 10a is attracted to the magnetic pole 8a and is pushed up. The bent portion 10c of the amateur 10 is pressed against the corner of the tip of the long side of the yoke 9 by the resta spring 11.

Further, the contact switching mechanism includes fixed contact terminals 1 and 2.
And a movable contact spring 3. As shown in FIGS. 1 and 2B, the fixed contact terminals 1 and 2 are vertically separated from each other. As shown in FIG. 2B, the movable contact spring 3 is pivotally supported by the support portion 4 of the base 6 at one end and is swingably arranged between the fixed contact terminals 1 and 2 forming a pair at the other end. It has movable contacts 12a and 12b for individually contacting the fixed contact terminals 1 and 2, and further has a contact piece 3a at the side edge. A part of the movable contact spring 3 is bent to have a spring property, and the movable contact 12a is brought into contact with the lower fixed contact terminal 2 by its spring force.

The contact piece 3a projects laterally in the vicinity of the support end of the movable contact spring 3, and is provided so as to extend in the length direction of the movable contact spring 3 while avoiding the movable contact. A part of the contact piece 3a is bent to have a spring property, and the contact piece 3a is pressed against the stud 10b of the amateur 10 with its spring force.

The electromagnet mechanism and the contact switching mechanism having the above construction are incorporated in the base 6. The lead wire 7a of the coil 7 is wound around and connected to the terminal 5 of the base 6,
The opening of the base 6 is covered with a cover 12.

Next, the operation of the electromagnetic relay according to the first embodiment of the present invention will be described. When the coil 7 is not excited,
The movable contact 12a is pressed by the spring force of the movable contact spring 3 and is in contact with the lower fixed contact terminal 2. Further, the one movable contact 12b is separated from the upper fixed contact terminal 1.

When the coil 7 is energized and excited, the attraction portion 10b of the armature 10 is attracted and attracted by the magnetic pole 8a of the core 8. Therefore, the amateur 10 rotates counterclockwise around the bent portion 10c as a fulcrum, and the stud 10
a is pushed upward. This allows the stud 1
Since 0a pushes the movable contact spring 3 upward, the movable contact 12a is disconnected from the lower fixed contact terminal 2, and the other movable contact 12b contacts the upper fixed contact terminal 1 to switch the contact.

According to the present invention, when the coil is not excited and the movable contact 12a is in contact with the lower fixed contact terminal 2, the contact piece 3a provided on the movable contact spring 3 is free from the stud 10a of the amateur 10. Is pressed against the yoke 9 side, and the armature 10 is fixed by pressure contact with the long side portion 9a of the yoke 9. Therefore, the movement of the armature 10 is fixed, so that even if vibration is applied from the outside, the movable contact spring 3 is not pushed up by the stud 10a, and the contact state between the movable contact 12a and the lower fixed contact terminal 2 is maintained. Is maintained. Therefore, the movable contact 12a is momentarily
It is possible to avoid a situation in which the fixed contact terminal 2 and the fixed contact terminal 2 repeatedly open and close to generate noise.

(Embodiment 2) FIG. 3 (a) is a plan view showing an electromagnetic relay according to Embodiment 2 of the present invention, and FIG. 3 (b) is a front view thereof.

The contact piece 3a of the movable contact spring according to this embodiment.
Is integrally formed inside the movable contact spring 3 by punching by a press while avoiding the movable contact, and a part thereof is bent to have a spring force. The contact piece 3a presses the stud 10a with a spring force to fix the armature 10 to the yoke 9, and the same effect as that of the first embodiment can be obtained.

(Embodiment 3) FIG. 4 (a) is a plan view showing an electromagnetic relay according to Embodiment 3 of the present invention, and FIG. 4 (b) is a front view thereof.

The contact piece 3 of the movable contact spring 3 according to this embodiment.
In a, the end of the movable contact spring 3 in the vicinity of the supporting portion is meandered to form a wavy shape to ensure a long effective length. This contact piece 3a is partially bent and has a spring force, and the spring force presses the stud 10a to cause the amateur 10 to move.
Is fixed to the yoke 9, the same effect as that of the first embodiment can be obtained, and further, since the contact piece 3a has a long effective length, the effect on the movable contact spring can be reduced.
The structure of the contact piece 3a shown in FIGS. 4A and 4B may be applied to the contact pieces shown in FIGS. 2 and 3 to obtain the same effect as that of the third embodiment.

[0028]

As described above, according to the present invention, the armature, which is free in the coil non-excited state, is fixed to the yoke by using the contact piece provided in a part of the movable contact spring. It is possible to suppress the malfunction of the amateur in, and it is possible to prevent the momentary opening of the contact and the generation of noise due to the malfunction of the amateur. This makes it possible to provide an electromagnetic relay having high vibration resistance and shock resistance.

Further, since the contact piece of the movable contact spring is provided so as to avoid the movable contact of the movable contact spring, the contact can be switched satisfactorily. Further, by increasing the effective length of the contact piece of the movable contact spring, it is possible to reduce the influence on the movable contact spring.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an electromagnetic relay according to a first embodiment of the present invention.

FIG. 2A is a plan view showing a main part of the electromagnetic relay according to the first embodiment of the present invention, and FIG. 2B is a front view of the same.

3A is a plan view showing a main part of an electromagnetic relay according to a second embodiment of the present invention, and FIG. 3B is a front view of the same.

FIG. 4A is a plan view showing a main part of an electromagnetic relay according to a third embodiment of the present invention, and FIG. 4B is a front view of the same.

FIG. 5A is a plan view showing a main part of a conventional example, and FIG.
Is a front view of the same.

FIG. 6A is a diagram showing a coil non-excitation state of a conventional example,
(B) is a diagram showing a coil excitation state.

[Explanation of symbols]

 1, 2 fixed contact terminals 3 movable contact spring 3a movable contact spring contact piece 8 core 8a core magnetic pole 9 yoke 9a yoke long side 9b yoke short side 10 amateur 10a insulating stud 10b amateur attraction 12a, 12b movable contact

Claims (4)

[Claims] 1. An electromagnetic relay combining an electromagnet mechanism and a contact switching mechanism, wherein the electromagnet mechanism has a yoke, a core and an armature, and the yoke has a long side portion and a long side portion extending in a lateral direction. It is an L-shaped structure consisting of a combination with a short side portion extending downward from the end portion, and constitutes a magnetic circuit. The core has a coil wound around it, and one end is attached to the short side portion of the yoke. The other end extending in the lateral direction along the side has a magnetic pole for attracting an amateur, and the armature is bent at a substantially central portion, and the attracting part is provided at one end.
It has an insulating stud at the other end, is supported so that it can be lifted up at the tip of the long side of the yoke with the bending part as a fulcrum, and the attracting part is attracted to the magnetic pole of the core to lift the insulating stud up. The contact switching mechanism has a pair of fixed contact terminals and a movable contact spring, the pair of fixed contact terminals are vertically spaced apart, and the movable contact spring is pivotally supported at one end to form a pair of fixed contacts. The other end located between the terminals has a movable contact that makes contact with each fixed contact terminal individually, and also has a contact piece, and the movable contact of the movable contact spring is always the lower fixed contact by the spring force of the movable contact spring. It comes into contact with the terminal, is pushed up by the insulating stud of the amateur, and switches to the upper fixed contact terminal to make contact.The contact piece of the movable contact spring has the movable contact of the movable contact spring and the lower fixed contact terminal. contact When are electromagnetic relay, characterized in that it is intended to fix pressed against the armature to the yoke. 2. The contact piece of the movable contact spring is provided so as to project laterally of the movable contact spring and extend in the length direction of the movable contact spring.
Electromagnetic relay described in. 3. The electromagnetic relay according to claim 1, wherein the contact piece of the movable contact spring is provided inside the movable contact spring by punching. 4. The electromagnetic relay according to claim 1, wherein the contact piece of the movable contact spring is formed in a wave shape and has a long effective length.