JP6336852B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnetic relay.

  2. Description of the Related Art Electromagnetic relays that open and close contacts in response to input of electrical signals are widely used. In general, the electromagnetic relay includes a fixed contact portion, a movable contact portion that contacts the fixed contact portion, and an electromagnet device that operates the movable contact portion.

  In addition, the electromagnetic relay realizes an arc extinguishing function that extinguishes arc discharge generated between the fixed contact part and the movable contact part in a short time by arranging permanent magnets on the sides of the fixed contact part and the movable contact part. doing. Furthermore, by arranging an arc extinguishing yoke around the permanent magnet, the magnetic force of the permanent magnet is increased to improve the arc extinguishing performance.

JP 2014-17086 A JP2013-80692A JP 2012-195102 A

  In order to reduce the size of the electromagnetic relay, it is essential to take measures to arrange each part in a space-saving manner, such as reducing the number of parts, in addition to downsizing the parts of each part of the electromagnetic relay. Parts related to the arc function are no exception.

  An object of one aspect of the present invention is to provide an electromagnetic relay capable of arranging parts related to the arc extinguishing function in a space-saving manner.

The electromagnetic relay according to the embodiment of the present invention has the following configuration. That is,
A fixed contact portion having a fixed contact;
A movable contact portion having a movable contact that contacts the fixed contact;
An electromagnet,
With a yoke,
The movable contact portion is provided so as to be rotatable with respect to the yoke, and operates in response to excitation of the electromagnet, so that the movable contact portion is in contact with the fixed contact and the movable contact, and the fixed contact and the movable An armature that operates between the contact point and the distant position;
With
The yoke has a plurality of arc extinguishing yoke portions arranged to face each other with the fixed contact and the movable contact in between.
Each of the plurality of magnetic parts is provided on one surface of the arc-extinguishing yoke part and arranged to face each other with the fixed contact and the movable contact in between.

  According to each embodiment of the present invention, it is possible to provide an electromagnetic relay in which parts related to the arc extinguishing function are arranged in a space-saving manner.

It is a figure which shows the whole structure of the main-body part of an electromagnetic relay. It is a figure which shows the structure of each part of the main-body part of an electromagnetic relay. It is the figure which showed the detailed structure of the yoke for arc-extinguishing of an electromagnetic relay. It is a figure for demonstrating attachment of a permanent magnet and the arc-extinguishing yoke. It is a figure which shows the outer side cover and bottom plate of an electromagnetic relay. It is a figure which shows the inner shape of an outer side cover, and the contact state of a contact part.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, the duplicate description is abbreviate | omitted by attaching | subjecting the same code | symbol.

[First Embodiment]
<1. Overall configuration of main body of electromagnetic relay>
First, the overall configuration of the electromagnetic relay according to the present embodiment will be described. FIG. 1 is a diagram illustrating the overall configuration of the main body 100 of the electromagnetic relay with the outer cover and the bottom plate removed.

  As shown in FIG. 1, the main body portion 100 of the electromagnetic relay includes a fixed contact portion 110, a movable contact portion 120, and an electromagnet device 130. The fixed contact portion 110, the movable contact portion 120, and the electromagnet The apparatus 130 is fixed by a base mold 140 or the like. Further, two terminals 150 and two terminals 160 protrude below the base mold 140.

  The fixed contact portion 110 has two fixed contact springs 111 and two fixed contacts 112, and each fixed contact spring 111 is connected to a different terminal 150. Similarly, the movable contact portion 120 also has two movable contact springs and two movable contacts, which are arranged to face the corresponding fixed contact spring 111 and fixed contact 112, respectively. The two movable contact springs are connected to the armature 131 via the holding member 137. FIG. 1 shows only one movable contact spring 121 of the two movable contact springs and one movable contact 122 of the two movable contacts.

  The electromagnet device 130 includes an armature 131, an iron core 132, a winding 133, a winding frame 134, a driving yoke 135, a hinge spring 136, and a holding member 137.

  The armature 131 is rotatably provided with the upper end portion of the driving yoke 135 as a fulcrum. When the armature 131 rotates about the upper end of the driving yoke 135, the movable contact portion 120 connected to the armature 131 via the holding member 137 is in a contact position where the movable contact and the fixed contact are in contact with each other. And a reciprocating motion between the movable contact and the fixed contact between the non-contact positions where they are not in contact with each other.

  Further, the armature 131 is attracted and separated from the end surface (iron core surface) of the iron core 132 inserted into the winding frame 134. Specifically, when an electromagnetic force is generated by applying a voltage to the terminal 160 connected to the winding 133 wound around the winding frame 134 (formed by the iron core 132, the winding 133, and the winding frame 134). When the electromagnet is excited), the armature 131 is attracted to the iron core surface. As a result, the movable contact portion 120 moves to the contact position. When the movable contact portion 120 moves to the contact position, the two movable contacts and the two fixed contacts come into contact with each other, so that one terminal 150 is one fixed contact and the movable contact, and the other movable contact and the fixed contact. It is electrically connected to the other terminal 150 via the.

  Since the hinge spring 136 urges the armature 131 in a direction in which the armature 131 is separated from the iron core surface, when the application of voltage to the terminal 160 is stopped, the armature 131 is separated from the iron core surface, and the movable contact portion 120. Moves to a non-contact position. And the non-contact position of the movable contact part 120 will be maintained until a voltage is applied to the terminal 160 next.

<2. Configuration of each part of electromagnetic relay body>
Next, the configuration of each part of the main body 100 of the electromagnetic relay will be described with reference to FIG. FIG. 2A is a diagram showing the configuration of the electromagnet device 130 among the respective parts of the main body part 100 of the electromagnetic relay. For convenience of explanation, the fixed contact part 110, the movable contact part 120, the base mold 140, the terminal 150, etc. Is omitted.

  As shown in FIG. 2A, the driving yoke 135 is formed in an L shape, and the bottom thereof is disposed near the bottom surface of the winding frame 134. The upper end portion of the drive yoke 135 is a fulcrum when the armature 131 rotates in the direction of the arrow 201. An iron core 132 that attracts and separates the armature 131 is inserted into the winding frame 134. A winding 133 is wound around the outer peripheral surface of the winding frame 134.

  FIGS. 2B and 2C are diagrams showing the configuration of the fixed contact portion 110 and the movable contact portion 120 and parts around the fixed contact portion 110 and the movable contact portion 120 among the respective portions of the main body portion 100 of the electromagnetic relay. It is. 2B and 2C, for convenience of explanation, the armature 131, the iron core 132, the winding 133, the winding frame 134, the hinge spring 136, the holding member 137, the base mold 140, the terminal 160, and the like are omitted. .

  As shown in FIGS. 2B and 2C, a plurality of permanent magnets 221 and 222, which are examples of magnetic members, are disposed on the side surfaces of the fixed contact portion 110 and the movable contact portion 120 that are disposed to face each other. ing. The permanent magnets 221 and 222 are disposed to face each other with the fixed contact portion 110 and the movable contact portion 120 interposed therebetween, and generate a magnetic force with respect to the fixed contact portion 110 and the movable contact portion 120. As a result, the permanent magnets 221 and 222 can move the movable contact portion 120 when the movable contact portion 120 operates from the contact position to the non-contact position or when the movable contact portion 120 operates from the non-contact position to the contact position. The arc generated between 120 and the fixed contact 110 is extinguished.

  Further, as shown in FIGS. 2B and 2C, the drive yoke 135 has a plurality of arc-extinguishing yokes 231 and 232 as arc-extinguishing yoke portions. The arc-extinguishing yokes 231 and 232 are located outside the permanent magnets 221 and 222 and enhance the effect of magnetic force by the permanent magnets 221 and 222. The construction of the arc extinguishing yokes 231 and 232 will be described in detail below.

<3. Detailed configuration of arc extinguishing yoke>
FIG. 3 is a diagram showing a detailed configuration of the arc extinguishing yokes 231 and 232. 3A is a perspective view in the vicinity of a position where the arc extinguishing yokes 231 and 232 are arranged, and FIG. 3B is a position where the arc extinguishing yokes 231 and 232 are arranged. It is a top view of the vicinity.

  As shown in FIG. 3A, the permanent magnets 221 and 222 and the arc extinguishing yokes 231 and 232 have a flat plate shape. The arc extinguishing yokes 231 and 232 are larger than the permanent magnets 221 and 222. The permanent magnets 221 and 222 are arranged so that one surface thereof is in contact with the surface of the arc extinguishing yokes 231 and 232 and the other surface is opposed to each other. That is, the arc extinguishing yokes 231 and 232 cover the outer surfaces of the permanent magnets 221 and 222, respectively. Further, one side surface of the arc-extinguishing yokes 231 and 232 is in contact with the driving yoke 135. The arc-extinguishing yokes 231 and 232 are in contact with the driving yoke 135 at the outermost position in the width direction of the driving yoke 135.

  Therefore, as shown in FIG. 3B, when the arc-extinguishing yokes 231 and 232 are attached from above, the arc-extinguishing yokes 231 and 232 and the driving yoke 135 Is formed.

  In this embodiment, the U-shaped arc-extinguishing yoke is not arranged, but the driving yoke 135 is shared as a part of the arc-extinguishing yoke, so that the U-shaped arc-extinguishing yoke is shared. Form a service yoke.

  In this way, by sharing the parts constituting one side of the U-shape with other parts, that is, the driving yoke 135, the arc-extinguishing yokes 231 and 232 can be used for arcuate arc-extinguishing. The arc extinguishing performance of the permanent magnets 221 and 222 can be improved to the same extent as when a yoke is disposed. Furthermore, when the arc-extinguishing yokes 231 and 232 are arranged, space saving can be realized as compared with the case where a U-shaped arc-extinguishing yoke is arranged.

<4. Mounting method of arc extinguishing yoke and permanent magnet>
Next, attachment of the arc extinguishing yokes 231 and 232 and the permanent magnets 221 and 222 will be described. FIG. 4 is a diagram illustrating attachment of the arc extinguishing yokes 231 and 232 and the permanent magnets 221 and 222.

  As shown in the partially enlarged region 400 of FIG. 4, the base mold 140 is provided with an opening 401 for inserting the arc extinguishing yoke 232 and the permanent magnet 222 from above. Although not shown in FIG. 4, the base mold 140 is also provided with an opening for inserting the arc extinguishing yoke 231 and the permanent magnet 221 from above.

  The arc-extinguishing yokes 231 and 232 and the permanent magnets 221 and 222 are inserted into the respective openings from above, so that the arc-extinguishing yokes 231 and 232 and the permanent magnets 221 and 222 are moved to the fixed contact portion 110 and movable. It is arranged on the side surface of the contact part 120. At this time, the arc-extinguishing yokes 231 and 232 and the permanent magnets 221 and 222 are arranged with respect to the driving yoke 135 in the positional relationship shown in FIG.

<5. Outer cover and bottom plate>
Next, the outer cover and the bottom plate of the electromagnetic relay will be described. FIG. 5 is a diagram illustrating an outer cover and a bottom plate that cover the main body 100 of the electromagnetic relay. As shown in FIG. 5, an outer cover 510 and a bottom plate 520 are attached to the main body 100 of the electromagnetic relay. Thereby, the outer cover 510 and the bottom plate 520 form the outermost surface of the electromagnetic relay 500, and the electromagnetic relay 500 in which the main body portion 100 of the electromagnetic relay is covered with the outer cover 510 and the bottom plate 520 is formed.

  The outer cover 510 covers the main body portion 100 of the electromagnetic relay and abuts against the arc-extinguishing yokes 231 and 232 and the permanent magnets 221 and 222, so that the arc-extinguishing yokes 231 and 232 and the permanent magnet 221 are contacted. It plays a role of fixing 222. FIG. 6 is a diagram illustrating an inner shape of the outer cover 510 and a contact state of the contact portion.

  As shown in FIG. 6A, contact portions 601 and 602 are arranged inside the outer cover 510. The outer cover 510 is configured such that the lower surfaces of the contact portions 601 and 602 are in contact with the upper surfaces of the permanent magnets 221 and 222 and the arc extinguishing yokes 231 and 232 when attached to the main body 100 of the electromagnetic relay. Yes. FIG. 6B shows a state where the lower surface of the contact portion 601 is in contact with the upper surface of the permanent magnet 221. FIG. 6C shows a state where the contact portion 601 is in contact with the upper surface of the arc extinguishing yoke 232.

  Accordingly, the arc extinguishing yokes 231 and 232 and the permanent magnets 221 and 222 are fixed, and these components can be prevented from sliding off from the opening 401 or the like.

<6. Summary>
As is clear from the above description, in the electromagnetic relay according to this embodiment,
-Permanent magnets and arc-extinguishing yokes are arranged on the side surfaces of the fixed contact portion and the movable contact portion so as to face each other with the fixed contact portion and the movable contact portion interposed therebetween.
-The arc-extinguishing yoke is attached to the outermost position in the width direction of the driving yoke, and a U-shape is formed by the arc-extinguishing yoke and the driving yoke.

  In this way, by sharing the drive yoke as part of the arc-extinguishing yoke, the arc-extinguishing performance of the permanent magnet can be improved to the same extent as when a U-shaped arc-extinguishing yoke is arranged. While improving, space saving can be realized compared with the case where a U-shaped arc extinguishing yoke is arranged.

[Second Embodiment]
In the first embodiment, the side surfaces of the arc-extinguishing yokes 231 and 232 and the driving yoke 135 are attached in contact with each other, but the present invention is not limited to this. For example, it is good also as a structure which provides a clearance gap between the side surface of the arc-extinguishing yokes 231 and 232, and the driving yoke 135. In the first embodiment, the arc-extinguishing yokes 231 and 232 are configured separately from the driving yoke 135, but the present invention is not limited to this. For example, the arc-extinguishing yokes 231 and 232 may be integrally formed with the driving yoke so as to extend from the driving yoke 135.

  In other words, the arc-extinguishing yokes 231 and 232 that the driving yoke 135 has as the arc-extinguishing yoke portion may be separate from or integral with the driving yoke 135. May be attached in contact with each other, or may be attached with a gap.

  The present invention is not limited to the configuration shown here, such as a combination with other components in the configuration described in the above embodiment. These points can be changed without departing from the spirit of the present invention, and can be appropriately determined according to the application form.

100: Electromagnetic relay main body 110, 110a, 110b: Fixed contact 111, 111a, 111b: Fixed contact spring 112, 112a, 112b: Fixed contact 120, 120a, 120b: Movable contact 121, 121a, 121b: Movable contact Spring 122, 122a, 122b: Movable contact 130: Electromagnet device 131: Armature 132: Iron core 133: Winding 134: Winding frame 135: Driving yoke 136: Hinge spring 137: Holding member 140: Base mold 150: Terminal 160 : Terminals 221 and 222: Permanent magnets 231 and 232: Arc-extinguishing yoke 500: Electromagnetic relay 510: Outer cover 520: Bottom plates 601 and 602: Abutting portions

Claims (4)

A fixed contact portion having a fixed contact;
A movable contact portion having a movable contact that contacts the fixed contact;
An electromagnet,
With a yoke,
The movable contact portion is provided so as to be rotatable with respect to the yoke, and operates in response to excitation of the electromagnet, so that the movable contact portion is in contact with the fixed contact and the movable contact, and the fixed contact and the movable An armature that operates between the contact point and the distant position;
With
The yoke has a plurality of arc extinguishing yoke portions arranged to face each other with the fixed contact and the movable contact in between.
An electromagnetic relay comprising a plurality of magnetic parts, each of which is attached to one surface of the arc extinguishing yoke part and arranged to face each other across the fixed contact and the movable contact.   The plurality of arc-extinguishing yoke portions are configured separately from the yoke, and side surfaces of the plurality of arc-extinguishing yoke portions are arranged in contact with the yoke. The electromagnetic relay according to 1.   The electromagnetic relay according to claim 1, wherein the plurality of arc-extinguishing yoke portions are formed by extending from the yoke.   The outer cover that forms the outermost surface of the electromagnetic relay, wherein the outer cover is provided with an abutting portion that abuts against the plurality of arc-extinguishing yoke portions. 3. The electromagnetic relay according to 3.

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