JP2014229499A - Electromagnetic relay - Google Patents

Abstract

An electromagnetic relay capable of improving a force for opening and closing a contact is provided. An armature is driven according to the magnetic force of an electromagnet. The card 5 has an arm portion 53 that reciprocates according to the driving of the armature 2 and extends in a direction orthogonal to the direction of motion. The two leaf springs 711 are arranged side by side so that the length direction is perpendicular to the arm portion 53, and are formed at the distal end portions so that the dimensions in the width direction are small and close to each other. , Having a hook portion that remains on the arm portion. The movable contact 75 is held by the leaf spring 711 and is displaced according to the movement of the card 5. The fixed contact 76 is disposed so as to face the movable contact 75. [Selection] Figure 1

Description

  The present invention relates to an electromagnetic relay having a plate-like spring.

  An electromagnetic relay is known in which an armature is driven according to the magnetic force of an electromagnet to displace a movable contact and open and close the movable contact and a fixed contact. Such an electromagnetic relay includes, for example, a card that converts the rotational motion of the armature into a linear motion, and a leaf spring that holds a movable contact and is deformed by the card (see Patent Document 1). The card has an arm portion extending in a direction perpendicular to the movement direction, and the arm portion opens between the movable contact and the fixed contact by pulling the tip of the leaf spring. The leaf spring is divided into two in the width direction by forming one slit along the length direction. The tip portions of the two divided leaf springs are separated from each other and each has a hook shape that stays on the arm portion of the card.

JP 2013-30309 A

Since the tip portions of the two leaf springs are separated from each other, the arm portion of the card needs to have a length corresponding to the distance between the tip portions of the two leaf springs. In addition, since the arm portion of the card is bent, the force at the time of pulling the leaf spring and opening the contact is reduced.
In view of the above problems, an object of the present invention is to provide an electromagnetic relay capable of improving the force when opening and closing a contact.

  In order to achieve the above object, a first aspect of the present invention includes an electromagnet, an armature driven in accordance with the magnetic force of the electromagnet, a reciprocating motion in accordance with the driving of the armature, and a direction orthogonal to the direction of motion. Are arranged side by side so that the length direction is perpendicular to the arm portion, and the front portion has a small size in the width direction and is close to each other. Two leaf springs having hook portions formed and staying on the arm portion, a movable contact held by the leaf spring and displaced in accordance with the movement of the card, and arranged to face the movable contact The gist of the invention is an electromagnetic relay provided with a fixed contact.

  Moreover, the electromagnetic relay which concerns on the 1st aspect of this invention WHEREIN: The length of the said arm part can be made shorter than the sum of the width | variety of the said 2 leaf | plate springs.

  Moreover, the electromagnetic relay which concerns on the 1st aspect of this invention WHEREIN: The said arm part can be connected with the said card | curd in the both ends side.

  In the electromagnetic relay according to the first aspect of the present invention, the armature includes a permanent magnet and can perform a latching operation.

  ADVANTAGE OF THE INVENTION According to this invention, the electromagnetic relay which can improve the force which opens and closes a contact can be provided.

It is a perspective view explaining the basic composition of the electromagnetic relay concerning an embodiment of the invention. It is a top view explaining the basic composition of the electromagnetic relay concerning an embodiment of the invention. It is a perspective view explaining the card | curd with which the electromagnetic relay which concerns on embodiment of this invention is provided. It is a perspective view explaining the leaf | plate spring with which the electromagnetic relay which concerns on embodiment of this invention is provided. It is a perspective view explaining the leaf | plate spring which a front-end | tip part does not adjoin. It is a perspective view explaining the card | curd which has a long arm part. It is a perspective view explaining the card | curd with which the electromagnetic relay which concerns on other embodiment of this invention is provided. It is a perspective view explaining the card | curd with which the electromagnetic relay which concerns on other embodiment of this invention is provided. It is a perspective view explaining the card | curd with which the electromagnetic relay which concerns on other embodiment of this invention is provided.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals, and redundant description is omitted. The embodiments described below exemplify apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is the shape, structure, arrangement, etc. of components. Is not specified as follows. The technical idea of the present invention can be variously modified within the technical scope described in the claims.

(Electromagnetic relay)
As shown in FIG. 1, the electromagnetic relay according to the embodiment of the present invention includes an electromagnet 1, an armature 2 that is rotationally driven according to the magnetic force of the electromagnet 1, and a movable contact 75 a that is displaced according to the driving of the armature 2. , 75b and fixed contacts 76a, 76b. The electromagnet 1 is fixed in a housing 3 that houses components of the electromagnetic relay according to the embodiment of the present invention, such as the electromagnet 1 and the armature 2.

  The electromagnet 1 includes a coil (not shown) and a magnetic pole piece 11 made of a magnetic material and magnetized by the coil. The pole piece 11 is generally U-shaped, and both end portions are respectively disposed on both end sides of the armature 2. The coil of the electromagnet 1 can excite the end portions of the magnetic pole pieces 11 with different polarities according to the electric power supplied from the housing 3 via the three coil terminals 10 extending outward.

  The electromagnetic relay according to the embodiment of the present invention is a so-called two-winding latching type, and can hold a contact-like body. The coil of the electromagnet 1 has a tap, and one coil terminal 10 is electrically connected to each end of the coil and the tap.

  The armature 2 includes two permanent magnets 21 arranged in parallel so that their polarities are in the same direction, two armatures 22a and 22b each made of a magnetic material, and the permanent magnet 21 and the armatures 22a and 22b. The holding body 23 which hold | maintains integrally, and the connection piece 24 are provided. The armature 2 has a substantially rectangular parallelepiped shape, and is supported by the support 4 so as to be rotatable about a rotation axis passing through the center.

  Each of the armatures 22 a and 22 b has a flat rectangular parallelepiped shape, and one surface of the surfaces facing each other in the thickness direction is magnetically attached to both pole sides of the permanent magnet 21. Therefore, the armatures 22a and 22b are magnetized with different polarities. Each of the armatures 22a and 22b extends in the length direction (the arrangement direction of the permanent magnets 21), and both end sides in the length direction protrude outward from the permanent magnets 21 and the holding body 23. Both end portions of the pole piece 11 are disposed in the gaps between the armatures 22a and 22b protruding on both sides.

  The holding body 23 has a substantially rectangular parallelepiped shape, and is formed by insert molding a synthetic resin on the permanent magnet 21 and the armatures 22a and 22b. The holding body 23 has a bearing portion 20 having a circular cross section that passes through the center of each of the two opposing surfaces from one surface to the other surface. The connecting piece 24 is a plate-like member bent into an S shape, and is arranged so that one end side is connected to one end side of the armature 22 b and the other end side is separated from the armature 2.

  The support body 4 is generally a rectangular flat plate, and on two sides facing each other, a fixing portion 41 fixed to the housing 3 and a columnar shaft portion 42 extending vertically from the central portion of the fixing portion 41. Have The support 4 supports the armature 2 so as to be rotatable about the central axis of the shaft portion 42 by inserting the shaft portion 42 into the bearing portion 20 of the armature 2.

  As shown in FIG. 2, when the electromagnet 1 is supplied with electric power to the coil via the coil terminal 10, both ends of the magnetic pole piece 11 are connected to either of the armatures 22a and 22b according to the energization direction of the coil. It is sucked into crab. As a result, the armature 2 rotates in a direction corresponding to the energization direction of the coil of the electromagnet 1. Once the coil of the electromagnet 1 is energized, the armature 2 maintains the state by the magnetic force of the permanent magnet 21 and performs a latching operation until a reverse current flows through the coil.

  The other end side of the connecting piece 24 not connected to the armature 22b is held by a card 5 arranged in the housing 3 so as to be able to reciprocate in a linear direction. As shown in FIG. 3, the card 5 has a generally flat plate shape and is disposed in the housing 3 in parallel with the movement direction of the card 5. The card 5 has a plate-like collar 51 that is orthogonal to the direction of movement of the card 5, a recess 52 into which the other end of the connecting piece 24 is inserted, and a rod-like shape that extends in a direction perpendicular to the direction of movement of the card 5. Arm portion 53.

  The flange portion 51 can increase the creeping distance between the connecting piece 24 located on the coil terminal 10 side which is the primary side and the card holding spring 74 located on the terminal plate 81 or 82 side which is the secondary side. it can. The creeping distance between the connecting piece 24 and the card holding spring 74 is a distance along the surface of the flange portion 51. In addition, the collar part 51 can define the movement range of the card 5. The concave portion 52 and the arm portion 53 are located on both ends in the movement direction of the card 5 with the flange portion 51 interposed therebetween. The card 5 can reciprocate linearly through the connecting piece 24 when the armature 2 is rotationally driven.

  The arm portion 53 holds the distal end portion of the leaf spring 71 holding the movable contacts 75a and 75b on the arm portion 53, and deforms the leaf spring 71, thereby deforming the gap between the movable contacts 75a and 75b and the fixed contacts 76a and 76b. open. The arm part 53 is connected to the card 5 at one end side, and the tip part is opened.

  As shown in FIG. 4, the leaf spring 71 is formed by a single slit 710 formed in the length direction from one end in the length direction of one strip-shaped metal plate to a region where a part of the other end is left. It is divided into two leaf springs 711a and 711b. The leaf springs 711 a and 711 b are arranged side by side so that the length direction is perpendicular to the arm portion 53 of the card 5.

  The leaf springs 711a and 711b have through holes 712a and 712b for holding the movable contacts 75a and 75b, respectively, and hook portions 713a and 713b formed at the tip portions. The hook portions 713a and 713b are formed so that the widthwise dimension thereof is smaller than the widthwise dimension of the leaf springs 711a and 711b, and is close to each other. The hook portions 713 a and 713 b are formed so as to be bent corresponding to the side surface of the arm portion 53, so that the hook portions 713 a and 713 b are likely to stay on the arm portion 53. The leaf springs 711a and 711b are bent in a convex shape in the bending direction of the hook portions 713a and 713b on the root side.

  The leaf spring 71 is fixed to the housing 3 through through holes 715a and 715b formed on the root side. Auxiliary springs 72 and 73 and a card holding spring 74 are laminated on one side of the leaf spring 71. The auxiliary springs 72 and 73 have the same shape as the leaf spring 71 except that the hook portion is not formed on the distal end side. The card holding spring 74 has the same shape as the leaf spring 71 except that the card holding spring 74 has a bent portion that bends in the direction opposite to the bending direction with respect to the hook portions 713a and 713b at the front end side and the intermediate portion. The card holding spring 74 is configured by the leaf spring 71 and the auxiliary springs 72 and 73 to constitute a contact holding body (71 to 74) that holds the movable contacts 75a and 75b.

  At the tip of the contact holder (71 to 74), the hooks 713a and 713b of the leaf spring 71 stay on the arm 53, and the tip of the card holding spring 74 stays in a region of the card 5 facing the arm 53. . Thereby, the tip of the contact holder (71 to 74) is held by the card 5 by the elastic force of the contact holder (71 to 74). The movable contacts 75a and 75b are displaced according to the reciprocating motion of the card.

  The contact holders (71 to 74) are electrically and mechanically connected to the terminal plate 81 at the other end. Therefore, the movable contacts 75a and 75b are electrically and mechanically connected to the terminal plate 81 via the contact holders (71 to 74). The fixed contacts 76a and 76b are arranged on the terminal plate 82 so as to face the movable contacts 75a and 75b. The fixed contacts 76a and 76b are electrically and mechanically connected to the terminal plate 82. That is, in the electromagnetic relay according to the embodiment of the present invention, the terminal plates 81 and 82 are electrically opened and closed according to the driving of the armature 2. Each of the terminal plates 81 and 82 is made of a belt-like metal plate and extends so as to protrude from the inside of the housing 3 to the outside.

  As shown in FIG. 2, when the armature 2 is rotated to the limit of the movable range and the movable contacts 75a and 75b and the fixed contacts 76a and 76b are closed, the movable contact 75a, A contact pressure is generated between 75b and the fixed contacts 76a and 76b. To open the gap between the movable contacts 75a and 75b and the fixed contacts 76a and 76b from this state, the polarity of the electromagnet 1 is reversed, the hook portions 713a and 713b are pulled by the arm portion 53, and the leaf springs 711a and 711b are deformed. Thus, the movable contacts 75a and 75b may be displaced.

  As shown in FIG. 5, when the hook portions 713ap and 713bp of the two leaf springs 711ap and 711bp are formed so as to reduce the dimension in the width direction from both sides in the width direction, the hook portions 713ap and 713bp The distance between them increases. At this time, as shown in FIG. 6, the card 5p needs an arm portion 53p having a length corresponding to the distance between the hook portions 713ap and 713bp. Therefore, the arm part 53p is easy to bend and the force at the time of pulling the leaf | plate springs 711ap and 711bp and opening a contact will reduce.

  According to the electromagnetic relay according to the embodiment of the present invention, since the hook portions 713a and 713b of the two leaf springs 711a and 711b are close to each other, the length of the arm portion 53 can be shortened. For example, the arm part 53 may be formed so that the length is shorter than the sum of the widths of the two leaf springs 711a and 711b. For this reason, according to the electromagnetic relay which concerns on embodiment of this invention, the bending of the arm part 53 at the time of pulling hook part 713a, 713b is reduced, and the force which opens and closes a contact can be improved.

(Other embodiments)
As mentioned above, although this invention was described by embodiment, it should not be understood that the description and drawing which form a part of this indication limit this invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, in the description of the embodiment described above, the example shown in FIG. 3 as the card 5 has been described. However, the card 5 can have various other shapes. For example, as shown in FIG. 7, the card 5 </ b> A may have a slit-shaped recess 52 </ b> A that extends from the opposite side to the recess 52 of the card 5. Further, as shown in FIG. 8, the card 5B may have an arm portion 53B connected to the card 5B at both ends. Further, as shown in FIG. 9, the card 5C has a slit-like recess 52C extending from the opposite side to the recess 52 of the card 5, and an arm portion 53C connected to the card 5C at both ends. Also good.

  As described above, the present invention naturally includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

DESCRIPTION OF SYMBOLS 1 Electromagnet 2 Armature 5, 5A, 5B, 5C Card 21 Permanent magnet 53, 53B, 53C Arm part 75a, 75b Movable contact 76a, 76b Fixed contact 713a, 713b Hook part

Claims (4)

An electromagnet,
An armature driven according to the magnetic force of the electromagnet;
A card having an arm portion that reciprocates in accordance with the drive of the armature and extends in a direction perpendicular to the direction of motion;
Hook portions that are arranged side by side so that the length direction is perpendicular to the arm portion, and are formed in the tip portion so as to be close to each other with small dimensions in the width direction, respectively. Two leaf springs having
A movable contact held by the leaf spring and displaced in accordance with the movement of the card;
An electromagnetic relay, comprising: a fixed contact disposed to face the movable contact.   The electromagnetic relay according to claim 1, wherein a length of the arm portion is shorter than a sum of widths of the two leaf springs.   The electromagnetic relay according to claim 1, wherein the arm portion is connected to the card at both ends.   The electromagnetic relay according to claim 1, wherein the armature includes a permanent magnet and performs a latching operation.

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