JP2012074136A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic relay in which an armature can push a card substantially horizontally and in which a movable contact of a movable terminal and a fixed contact of a fixed terminal can be brought into contact with each other substantially on the whole surfaces.SOLUTION: In an electromagnetic relay, a card 3 is supported against a basis 2 so as to be rotatable and to be movable back and forth in the horizontal direction while a contact face 3i brought into contact with an armature 22 at the tip of a first branch part 3d of the card 3 is beveled in the direction separating from the armature 22. Therefore, the armature 22 is allowed to push the card 3 substantially horizontally, and a movable contact 24a of a movable terminal 24 and a fixed contact 25b of a fixed terminal 25 can be brought into contact with each other substantially on the whole surfaces.

Description

  The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay in which an electromagnet portion, an armature, a card, a movable terminal, and a fixed terminal are provided in parallel on a base formed of an insulating member.

  As the electromagnetic relay described above, for example, the one described in Patent Document 1 is known. FIG. 8 is a side view showing a conventional electromagnetic relay. As shown in the figure, in an electromagnetic relay 10, an electromagnet portion 21, an armature 22, a card 23, a movable terminal 24, and a fixed terminal 25 are arranged in parallel on a base 20 formed in a rectangular shape with an insulating member such as resin. Is provided. The electromagnet portion 21 includes a yoke 21a and a coil 21b fixed to the yoke 21a. By energizing the electromagnet portion 21, electromagnetic force is generated and the armature 22 is attracted.

  The armature 22 is formed in a substantially square shape, and the central portion 22 a is supported on the yoke 21 a side at the upper end of the electromagnet portion 21. The armature 22 is fixed to the electromagnet portion 21 by a hinge spring (not shown). FIG. 8 shows a state when the electromagnet portion 21 is not energized. In this state, the armature 22 is stopped with the distal end portion 22b in contact with the card 23. However, when the electromagnet portion 21 is energized, the proximal end portion 22c is attracted to the electromagnet portion 21 so It rotates around the part 22a. When the electromagnet portion 21 is not energized, the armature 22 returns to the original state by the hinge spring. That is, it returns to the state where the tip 22b of the armature 22 is in contact with the card 23.

  The card 23 includes a support shaft 23b, a first branch portion 23d, and a second branch portion 23f. The support shaft 23b is a portion that extends from a lower end portion 23a that is rotatably supported by the base 20, and the first branch portion 23d is a first pressure contact that contacts the armature 22 from one point on the support shaft 23b. This is a portion that extends in a direction perpendicular to the support shaft 23b toward the point 23c. The second branch portion 23f is a portion that extends in a direction perpendicular to the support shaft 23b from the other point on the support shaft 23b toward the second pressure contact 23e that contacts the movable terminal 24. The card 23 is supported by the bearing portion 20 a of the base 20 so as to be rotatable in the direction of the armature 22 and the movable terminal 24, and is rotated in conjunction with the rotation of the armature 22. 24 a is brought into contact with the fixed contact 25 a of the fixed terminal 25.

Japanese Utility Model Publication No. 6-019250

  In the conventional electromagnetic relay 10 described above, the second pressure contact 23e that pushes the movable terminal 24 of the card 23 is above the first pressure contact 23c that contacts the armature 22, and the card 23 is centered on the lower end. By rotating, the movable contact 24a of the movable terminal 24 and the fixed contact 25a of the fixed terminal 25 are turned on / off. However, such a structure causes the following problems. That is, when the armature 22 and the card 23 are rotated, as indicated by an arrow A in FIG. 8, the force escapes upward and the card 23 cannot push the movable terminal 24 horizontally. The movable contact 24a and the fixed contact 25a of the fixed terminal 25 do not contact uniformly over the entire surface.

  The present invention has been made in view of the above situation, and an armature can push a card substantially horizontally, so that a movable contact of a movable terminal and a fixed contact of a fixed terminal can be brought into contact with substantially the entire surface. The purpose is to provide a relay.

  The electromagnetic relay of the present invention is erected on a base formed of an insulating member, has a movable terminal having a movable contact, and a fixed contact, and the fixed contact is opposed to the movable contact of the movable terminal. A fixed terminal that is erected on the base, an electromagnet portion that is erected on the base and spaced from the movable terminal, and a fulcrum at the tip of the electromagnet portion that rotates by energizing the electromagnet portion. A first pressure contact that is positioned between a pole, the movable terminal, and the armature, is rotatably supported by the base in the direction of the armature and the movable terminal, and contacts the armature. And a card having a second pressure contact that contacts the movable terminal at a position spaced apart from the first pressure contact, the electromagnetic relay comprising a contact surface between the card and the armature At least one of them is separated from the other It has an inclined surface that is inclined direction.

  Moreover, the said electromagnetic relay WHEREIN: The said inclined surface is comprised by the chamfering part.

  In the electromagnetic relay, the inclined surface of the armature is formed by bending the armature in the vicinity of the first pressure contact.

  In the electromagnetic relay, the card includes a support shaft, a first branch portion extending in a direction perpendicular to the support shaft from one point on the support shaft toward the first pressure contact, A second branch extending in a direction perpendicular to the support shaft from the other point on the support shaft toward the second pressure contact.

  In the electromagnetic relay, the card includes first and second beam portions that include at least a part of the support shaft and connect the first pressure contact and the second pressure contact from the fulcrum, respectively.

  The present invention supports the card so that it can rotate in the direction of the armature and the movable terminal with respect to the base and can be slightly moved back and forth in the horizontal direction, and at least one of the contact surfaces of the armature and the card, Since the inclined surface inclined in the direction away from the other side is provided, the armature can push the card substantially horizontally, and the movable contact of the movable terminal and the fixed contact of the fixed terminal can be brought into contact with substantially the entire surface.

The side view which shows the electromagnetic relay which concerns on one embodiment of this invention It is a figure which shows the card | curd of the electromagnetic relay of FIG. 1, (a) is a left view, (b) is a right view. Fig. 1 is a top view of the base of the electromagnetic relay in Fig. 1 The side view which shows the card | curd of the electromagnetic relay of FIG. The figure which shows the contact location of the armature of the electromagnetic relay of FIG. 1, and a card | curd The figure which shows the contact location of an armature and a card | curd at the time of chamfering to the armature side in the electromagnetic relay of FIG. The figure which shows the contact location of an armature and a card | curd at the time of bending the front-end | tip part of an armature and forming an inclined surface in the electromagnetic relay of FIG. Side view showing a conventional electromagnetic relay Explanatory drawing which shows the state which the card | curd of the conventional electromagnetic relay deform | transformed, (a) is a figure which shows an initial state, (b) is a figure which shows the time of operation | movement.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view showing an electromagnetic relay according to an embodiment of the present invention. 1 that are the same as those in FIG. 8 described above are denoted by the same reference numerals.

  In FIG. 1, the electromagnetic relay 1 of the present embodiment includes an electromagnet unit 21, an armature 22, a base 2, a card 3, a movable terminal 24, and a fixed terminal 25. Since the members of the electromagnet portion 21, the armature 22, the movable terminal 24, and the fixed terminal 25 other than the card 3 and the base 2 are the same as those of the conventional electromagnetic relay 10 shown in FIG. Omitted.

  The base 2 is formed in a square shape with an insulating member such as a resin, like the base 20 of the conventional electromagnetic relay 10. On the base 2, an electromagnet portion 21, a card 3, a movable terminal 24, and a fixed terminal 25 are erected in parallel. In particular, the card support portion 2a for supporting the card 3 of the base 2 is formed as a rectangular space having a circular arc shape on both ends that allows the lower end portion (fulcrum) 3a of the card 3 to be rotatable and move back and forth in the horizontal direction. . Although details of the card 3 will be described later, as shown in FIG. 2, the lower end portion 3a of the card 3 is divided into two parts, and each is formed so as to form a kick part protruding in the shape of a shoe sole in the horizontal direction. 2A is a left side view, and FIG. 2B is a right side view. This lower end portion 3 a is accommodated in the card support portion 2 a of the base 2. Desirably, the card support part 2a may also have a small protrusion 2b to support the center of the card lower end part 3a.

  FIG. 3 is a view of the card support portion 2a of the base 2 as viewed from above. The lower end 3a of the card 3 is supported by the card support 2a so as to be rotatable and movable back and forth in the horizontal direction (directions indicated by arrows B and C). The horizontal length L1 of the card support portion 2a is larger than the distance between the movable contact 24a of the movable terminal 24 and the fixed contact 25a of the fixed terminal 25, and the horizontal movement distance of the card 3 is determined by the movable contact. It is made to be more than the distance between 24a and the fixed contact 25a.

  The card 3 is positioned between the armature 22 on the base 2 and the movable terminal 24, and is supported by the base 2 so as to be rotatable in the direction of the armature 22 and the movable terminal 24. FIG. 4 is a diagram showing an overview of the card 3. In the figure, the card 3 includes a first branch portion 3d, a second branch portion 3f, a beam portion 3g and a beam portion 3h in addition to the support shaft 3b extending from the lower end portion 3a. The first branch portion 3d extends in a direction perpendicular to the support shaft 3b from one point on the support shaft 3b toward the first pressure contact 3c. The second branch portion 3f extends in the direction perpendicular to the support shaft 3b from the other point on the support shaft 3b toward the second pressure contact 3e. The beam portion 3g has a triangular shape including the support shaft 3b and connecting the first pressure contact 3c from the lower end portion 3a. The beam portion 3h has a triangular shape including the support shaft 3b and connecting the second pressure contact 3e from the lower end portion 3a. Compared with the card 23 of the conventional electromagnetic relay 10 shown in FIG. 8, the card 3 of the electromagnetic relay 1 according to the present embodiment has the beam portions 3g and 3h, and therefore has high mechanical strength and is difficult to bend. Yes. By the way, in the conventional case without these beam portions 3g and 3h, that is, when formed as shown in FIG. 9A, bending occurs as shown in FIG. On / off operation may not be possible.

  The tip of the first branch 3d of the card 3 is chamfered. FIG. 5 is a diagram illustrating a contact portion between the armature 22 and the card 3. As shown in the figure, the contact surface 3 i that contacts the armature 22 of the first branch 3 d of the card 3 is chamfered in a direction away from the armature 22. Since the tip of the first branch portion 3d of the card 3 is chamfered and the card 3 is rotatable with respect to the base 2 and can be moved back and forth in the horizontal direction, the armature 22 can be moved substantially horizontally. 3 can be pressed. At this time, since the card 3 reinforced by the beam portions 3g and 3h is not easily bent, the armature 22 can reliably push the card 3. By pushing the card 2 substantially horizontally, the movable contact 24a of the movable terminal 24 and the fixed contact 25a of the fixed terminal 25 can be brought into contact with substantially the entire surface.

  Thus, according to the electromagnetic relay 1 of the present embodiment, the card 3 is supported so as to be rotatable with respect to the base 2 and movable back and forth in the horizontal direction, and the first branch 3d of the card 3 is supported. Since the contact surface 3i that contacts the front armature 22 is chamfered in a direction away from the armature 22, the armature 22 can push the card 3 substantially horizontally, and the movable contact 24a of the movable terminal 24 The fixed contact 25a of the fixed terminal 25 can be brought into contact with substantially the entire surface.

  In the electromagnetic relay 1 of the present embodiment, the chamfering is performed on the card 3 side, but the chamfering may be performed on the armature 22 side, or both the card 3 and the armature 22 may be performed. .

  FIG. 6 is a diagram illustrating a contact portion between the armature 22 and the card 3 when chamfering is performed on the armature 22 side. As shown in the figure, the contact surface 22d of the armature 22 that contacts the first branch 3d of the card 3 is chamfered in a direction away from the first branch 3d of the card 3. Even if the armature 22 is chamfered, the armature 22 can push the card 3 substantially horizontally.

In addition to chamfering, for example, the tip 22b of the armature 22 can be bent to form an inclined surface. FIG. 7 is a diagram illustrating a contact portion between the armature 22 and the card 3 when the tip 22b of the armature 22 is bent to form an inclined surface. In the example shown in the figure, the tip 22b of the armature 22 is bent near the first pressure contact 3c of the card 3 to form an inclined surface 22e. Since metal is generally used for the armature 22, bending can be easily performed. Even if the tip 22b of the armature 22 is bent to form the inclined surface 22e, the armature 22 can push the card 3 substantially horizontally, and the movable contact 24a of the movable terminal 24 and the fixed contact 25a of the fixed terminal 25 can be pressed. Can be brought into contact with substantially the entire surface. The inclined surface 22e includes a chamfered portion 22f.
The first and second beam portions may be surfaces including a support shaft, or include at least a part of the support shaft, and linear members that extend toward the first and second pressure contacts, respectively. It may be.

DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 2 Base 2a Card support part 3 Card 3a Lower end part 3b Support shaft 3c 1st press contact 3d 1st branch part 3e 2nd press contact 3f 2nd branch part 3g, 3h Beam part 3i Contact surface DESCRIPTION OF SYMBOLS 21 Electromagnet part 21a Yoke 21b Coil 22 Armature 22a Center part 22b Tip part 22c Base end part 22d Contact surface 22e Inclined surface 22f Chamfering part 24 Movable terminal 24a Movable contact 25 Fixed terminal 25a Fixed contact

Claims (5)

A movable terminal erected on a base formed of an insulating member and having a movable contact;
A fixed terminal that is erected on the base so that the fixed contact faces the movable contact of the movable terminal;
An electromagnet portion that is spaced from the movable terminal and is erected on the base;
An armature having a fulcrum at the tip of the electromagnet part and rotating by energizing the electromagnet part;
Located between the movable terminal and the armature, rotatably supported in the direction of the armature and the movable terminal at the base, and having a first pressure contact that contacts the armature, A card having a second pressure contact that contacts the movable terminal at a position spaced from the first pressure contact;
An electromagnetic relay having an inclined surface in which at least one of contact surfaces of the card and the armature is inclined in a direction away from the other.   The electromagnetic relay according to claim 1, wherein the inclined surface includes a chamfered portion.   3. The electromagnetic relay according to claim 1, wherein the inclined surface of the armature is formed by bending the armature in the vicinity of the first pressure contact. 4.   4. The electromagnetic relay according to claim 1, wherein the card is a support shaft and a point from the support shaft toward the first pressure contact point with respect to the support shaft. 5. A first branch portion extending in a direction perpendicular to the support shaft; and a second branch portion extending in a direction perpendicular to the support shaft from the other point on the support shaft toward the second pressure contact point; An electromagnetic relay comprising:   5. The electromagnetic relay according to claim 4, wherein the card includes at least a part of the support shaft and connects the first pressure contact and the second pressure contact, respectively. Electromagnetic relay with

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