JP2014035884A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic relay capable of preventing deterioration of the wear resistance of a stem of a resin card.SOLUTION: An electromagnetic relay 20 has a card 5 rotatably supported by a resin base 1. The card 5 is arranged to rotate forward/reverse due to excitation or non-excitation of an electromagnet block 4, and a moving member engaged with the card 5 moves forward/backward in a linear direction according to the rotation of the card 5 to thereby turn ON/OFF a contact part 2. The card 5 has a stem 25 made of a resin which is movably engaged with a bearing hole 60 of a base 1. The stem 25 includes a Y-rear end plane 25b formed to be parallel to a bearing plane 61 of the bearing hole 60 in an insertion direction into the bearing hole 60.

Description

  The present invention relates to an electromagnetic relay.

  Conventionally, the card has a card (movable block) that is rotatably supported by the base, and the card rotates forward and backward by excitation and non-excitation of the electromagnet block, and the moving body locked to the card is the card. An electromagnetic relay is known in which a contact portion is switched on and off by reciprocating in a linear direction in accordance with rotation (see, for example, Patent Document 1).

JP 2005-63940 A

  By the way, in the above prior art, the shaft portion of the card (movable block) is made of metal and is formed in a columnar shape that engages with the bearing hole of the base, but the insertability of the shaft portion into the bearing hole is improved. For this reason, it has been proposed that the shaft portion is made of resin and that the front end portion and the rear end portion in the insertion direction of the shaft portion into the bearing hole are tapered.

  However, in the configuration in which the shaft portion is made of resin and the taper is provided, the insertability into the bearing hole can be improved, but the bearing hole and the shaft portion slide between the resin when the card is rotated. There was a concern that the sliding resistance was high and the wear resistance was lowered. In particular, when the card is rotated, the taper shape of the shaft portion slides in the bearing hole, so that the shaft portion may be easily scraped.

  Therefore, an object of the present invention is to obtain an electromagnetic relay capable of suppressing a decrease in wear resistance of a shaft portion even when the shaft portion of a card is made of resin.

  In order to achieve the above object, a first feature of the present invention is that a card is rotatably supported on a resin base, and the card rotates forward and backward by excitation and non-excitation of an electromagnetic block. In addition, in the electromagnetic relay in which the contact portion is switched on and off by reciprocating in a linear direction according to the rotation of the card, the card is a bearing of the base. A shaft portion made of resin that is rotatably engaged with the hole, and the shaft portion is formed such that a rear end surface in a direction of insertion into the bearing hole is formed in parallel with the bearing surface of the bearing hole. And

  The gist of the second feature of the present invention is that the shaft portion is formed in a tapered shape such that the front end portion in the insertion direction into the bearing hole is tapered toward the distal end side in the insertion direction.

  According to a third aspect of the present invention, the base is open at one end side for inserting the card, and an inner wall portion of the base is formed between the bearing hole and one end portion of the base. The gist is to have a tapered surface having the same angle as the front end portion of the shaft portion.

  The gist of the fourth feature of the present invention is that the inner wall portion of the base has a peripheral edge portion of the tapered surface formed in parallel with the insertion direction.

  The fifth feature of the present invention is summarized in that the shaft portion is formed in a substantially cylindrical shape, and both end surfaces in an orthogonal direction orthogonal to the insertion direction are chamfered in a flat shape.

  According to the present invention, since the rear end surface of the card in the insertion direction into the bearing hole is formed in parallel with the bearing surface of the bearing hole, the card is provided on both sides of the front end and the rear end in the insertion direction of the shaft. Compared with a configuration in which a taper is provided, it is possible to suppress a decrease in wear resistance of the shaft portion.

It is a perspective view of the electromagnetic relay concerning one Embodiment of this invention. It is a side view of the electromagnetic relay concerning one Embodiment of this invention. It is a front view of the axial part of the card | curd shown in FIG. (A) is the sectional view on the AA line of FIG. 3, (b) is the sectional view on the BB line of FIG. It is an enlarged view of the bearing hole vicinity of the base shown in FIG. It is the figure which showed the assembly | attachment condition of the card | curd and base of an electromagnetic relay concerning one Embodiment of this invention, Comprising: (a) is before insertion to the bearing hole of a shaft part, (b) is the insertion direction front end of a shaft part. (C) is the figure after the insertion to the bearing hole of the axial part at the time of sliding with a taper surface of a part and a body.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, the side on which the electromagnet block of the electromagnetic relay is provided is defined as the front side in the front-rear direction, and the side on which the contact portion is provided is defined as the rear side in the front-rear direction. The direction in which the contact portion is attached is defined as the up-down direction. And the direction orthogonal to the front-back direction and the up-down direction is defined as the width direction.

  FIGS. 1-6 is the figure which showed one Embodiment of the electromagnetic relay 20 concerning this invention. As shown in FIGS. 1 and 2, the electromagnetic relay 20 of the present embodiment is supported by a resin base 1, a multipolar contact portion 2 assembled to the base 1, and a base 1 that is rotatable. A card 5 and an electromagnet block 4 disposed to face the card 5 are provided. Further, the electromagnetic relay 20 includes a moving body (not shown) for switching contacts that is locked to the card 5 and the contact portion 2, and these moving bodies (not shown), the base 1, the contact portion 2, The electromagnet block 4 and the card 5 are covered from above with a cover (not shown).

  A partition wall 1a is provided at the center in the width direction of the base 1, and contact portions 2 are disposed on both sides of the partition wall 1a in the width direction. The contact portions 2 arranged on both sides in the width direction of the partition wall 1a have the same specifications. That is, the contact portion 2 of the present embodiment is disposed on the front side in the front-rear direction and constitutes a normally closed circuit, and the fixed contact portion 7 and the movable contact portion 8 that constitute a normally closed circuit, and is disposed on the rear side in the front-rear direction to constitute a normally open circuit. Two sets of fixed contact portion 9 and movable contact portion 10 are provided. The contact portions 7, 8, 9, 10 are press-fitted and fixed to the base 1, and terminals 7a, 8a, 9a extending from the contact portions 7, 8, 9, 10 from the lower wall portion of the base 1. 10a protrudes. Further, the upper end portions of the movable contact portion 8 and the movable contact portion 10 are locked to locking holes of a moving body (not shown) supported so as to be slidable in the front-rear direction above the partition wall 1a. It has become.

  The card 5 includes a main body portion 21 having an opening formed on one end side (front side in the front-rear direction). The main body portion 21 is rotatably engaged with bearing holes 60 of the base 1 on both sides in the width direction. A shaft portion 25 is projected. An iron piece (not shown) is disposed in the opening of the main body 21, and a permanent magnet 23 is attracted and fixed to the iron piece, and a nonmagnetic member is formed so as to cover the iron piece on both upper and lower sides of the permanent magnet 23. A shielding plate 24 is attached. In addition, a locking projection 26 that is locked in the locking hole of the above-described moving body (not shown) is formed on the upper end of the main body 21 so as to protrude.

  The electromagnet block 4 includes a coil bobbin 14 fitted with an iron core 13, a coil 15 wound around the coil bobbin 14, and yokes 16 fixed by crimping to both upper and lower ends of the iron core 13. The card 5 is disposed opposite to the bent end of the card. A terminal 17 protruding from the lower wall portion of the base 1 is connected to the coil 15 of the electromagnet block 4, and in a non-excited state in which the current to the coil 15 is cut off, as shown in FIG. The upper part of the back is rotated back to the front side in the front-rear direction.

  That is, in the present embodiment, a moving body (not shown) locked to the return spring 12 by a return spring 12 erected on the base 1, and the card 5 and the movable contact portion locked to the moving body. 8, 10 is always urged forward in the front-rear direction. In the excited state in which the coil 15 is energized, the upper portion of the card 5 is moved rearward in the front-rear direction, so that the movable contact portion 8 and the fixed contact portion 7 that are in contact are separated from each other, and the movable contact Switching of the contact part 2 is performed when the part 10 and the fixed contact part 9 contact.

  As described above, in this embodiment, the moving body (not shown) locked to the card 5 reciprocates in the linear direction (front-rear direction in the present embodiment) in accordance with the rotation of the card 5, thereby causing the contact portion. 2 can be switched on and off.

  3 is a front view of the shaft portion 25 of the card 5 shown in FIG. 1, FIGS. 4 (a) and 4 (b) are cross-sectional views taken along lines AA and BB in FIG. 3, and FIG. 6 is an enlarged view of the vicinity of the bearing hole 60 of the base 1, and FIGS. 6A to 6C are views showing an assembled state of the card 5 and the base 1 of the electromagnetic relay 20. FIG.

  In this embodiment, the shaft portion 25 of the card 5 is formed of resin, and sliding between the shaft portion 25 and the bearing hole 60 of the base 1 when the card 5 rotates is slid between the resin. Will move. For this reason, there is a concern that the wear resistance may be lowered, and in particular, when the card 5 is rotated from the non-excited state to the excited state (when the card 5 is rotated to the rear side in the front-rear direction), the shaft portion 25 is used. There is a possibility that the rear end face 25b in the direction Y of insertion into the bearing hole 60 is likely to be scraped.

  Therefore, in this embodiment, as shown in FIG. 4A and FIGS. 6A to 6C, the insertion direction Y rear end surface 25 b of the shaft portion 25 is formed in parallel with the bearing surface 61 of the bearing hole 60. I am doing so. On the other hand, the insertion direction Y front end portion 25a of the shaft portion 25 is formed in a tapered shape that tapers toward the distal end side in the insertion direction Y.

  Thus, in this embodiment, since the rear end surface 25b of the shaft portion 25 is formed in parallel with the bearing surface 61 of the bearing hole 60, the rear end surface 25b of the shaft portion 25 that is particularly easily scraped when the card 5 is rotated. Can be prevented.

  Further, as shown in FIG. 1, in the present embodiment, one end side (front-rear direction front side) of the base 1 is opened to insert the card 5, and the insertion direction Y front end portion 25a of the shaft portion 25 is inserted. It is formed in a tapered shape that tapers toward the front end side in the direction Y. Therefore, the insertion property to the bearing hole 60 (base 1) can be improved by the front end portion 25a of the tapered shaft portion 25. Furthermore, by pushing the card 5 into the base 1 when the shaft portion 25 is inserted, so-called galling that the shaft portion 25 is scraped by the wall of the base 1 can be reduced.

  As described above, according to the present embodiment, the rear end face 25b is made parallel to the bearing surface 61 while the front end portion 25a is formed in a tapered shape, so that it is possible to reduce galling when the card 5 is assembled. There is an advantage that a decrease in wear resistance of the shaft portion 25 during driving can be suppressed.

  Further, as shown in FIGS. 5 and 6A to 6C, in this embodiment, the inner wall portion 62 of the base 1 has a bearing hole 60 and one end portion of the base 1 (an end portion on the front side in the front-rear direction). And a tapered surface 65 having the same angle as that of the front end portion 25a of the shaft portion 25.

  The tapered surface 65 is formed by reducing the thickness of the side wall portion of the base 1 toward one end side (front side in the front-rear direction), and is opposite to the front end portion 25 a of the shaft portion 25, The inclined surface gradually expands toward the side (the base end side in the insertion direction Y).

  Furthermore, in this embodiment, the inner wall portion 62 of the base 1 is formed such that the peripheral edge portion 64 of the tapered surface 65 described above is parallel to the insertion direction Y.

  As described above, in this embodiment, the tapered surface 65 is provided also on the inner wall 62 side of the base 1 that slides with the shaft portion 25 when the card 5 is assembled, and the peripheral portion 64 of the tapered surface 65 is inserted in the insertion direction. It is formed in parallel with Y. Thus, when the card 5 is assembled, the shaft portion 25 of the card 5 can be easily guided to the tapered surface 65 using the tapered surface 65 of the base 1 as a mark. In addition, since the shaft portion 25 is automatically inserted into the bearing hole 60 by pushing the card 5, the insertability of the shaft portion 25 can be further enhanced.

  At this time, as shown in FIG. 5 and FIGS. 6A to 6C, it is preferable to provide R on the distal end side (one end side of the base 1) of the tapered surface 65. If it carries out like this, it will become possible to suppress more that the front-end part 25a of the axial part 25 is shaved at the time of the insertion to the taper surface 65 of the axial part 25. FIG.

  Furthermore, as shown in FIGS. 1 to 3, in this embodiment, the shaft portion 25 is formed in a substantially cylindrical shape, and both end faces 25 c and 25 d in the orthogonal direction (vertical direction) orthogonal to the insertion direction Y are The shaft portion 25 is chamfered so as to be flat in a plan view (FIG. 3).

  In such a configuration, as shown in FIG. 2, a gap is formed between both end surfaces 25 c and 25 d of the shaft portion 25 and the bearing surface 61 in the engaged state in which the shaft portion 25 is inserted into the bearing hole 60. become able to. Therefore, both end surfaces 25c and 25d of the shaft portion 25 can be prevented from coming into contact with the bearing surface 61 when the card 5 is rotated, and the frictional resistance can be reduced and the shaving of the shaft portion 25 can be suppressed.

  As described above, according to the electromagnetic relay 20 of the present embodiment, the card 5 has the resin shaft portion 25 that is rotatably engaged with the bearing hole 60 of the base 1, and the shaft portion 25. The rear end surface 25 b in the insertion direction Y into the bearing hole 60 is formed in parallel with the bearing surface 61 of the bearing hole 60. Therefore, compared with the structure in which the taper is provided on both sides of the insertion direction front end portion and the rear end portion of the shaft portion, a decrease in wear resistance of the shaft portion 25 can be suppressed.

  In particular, in this embodiment, since the insertion direction Y rear end surface 25b of the shaft portion 25 is a portion that is particularly easily scraped when the card 5 is rotated, it is possible to suppress the shaving of the shaft portion 25 in the portion that is easily scraped. There is.

  Moreover, in this embodiment, the insertion direction Y front end part 25a of the shaft part 25 is formed in a tapered shape that tapers toward the distal end side in the insertion direction Y. For this reason, the front end portion 25a of the tapered shaft portion 25 can improve the insertability into the bearing hole 60 (base 1), and the card portion 5 is pushed into the base 1 to insert the card portion 25 into the base 1. It is possible to reduce so-called galling that is scraped by one wall.

  As described above, according to the present embodiment, the rear end face 25b is made parallel to the bearing surface 61 while the front end portion 25a is formed in a tapered shape, so that it is possible to reduce galling when the card 5 is assembled. There is an advantage that a decrease in wear resistance of the shaft portion 25 during driving can be suppressed.

  In the present embodiment, the base 1 is open at one end side (front side in the front-rear direction) for inserting the card 5, and the inner wall portion 62 of the base 1 is formed between the bearing hole 60 and one end portion of the base 1. It has a tapered surface 65 formed therebetween and having the same angle as the front end portion 25a of the shaft portion 25. For this reason, the tapers can be slid when the card 5 is assembled, and the insertability of the shaft portion 25 can be enhanced, and the shaft portion 25 can be further reduced in galling.

  Furthermore, in the present embodiment, the inner wall portion 62 of the base 1 is formed such that the peripheral edge portion 64 of the tapered surface 65 is parallel to the insertion direction Y. Therefore, the shaft portion 25 of the card 5 can be easily guided to the tapered surface 65 by using the tapered surface 65 of the base 1 as a mark when the card 5 is assembled. Since the shaft portion 25 is automatically inserted into the bearing hole 60 by pushing the card 5 guided to the tapered surface 65, the insertability of the shaft portion 25 can be further enhanced.

  Further, in the present embodiment, the shaft portion 25 is formed in a substantially cylindrical shape, and both end surfaces 25c and 25d in the orthogonal direction orthogonal to the insertion direction Y are chamfered in a flat shape. Therefore, in the engaged state in which the shaft portion 25 is inserted into the bearing hole 60, a gap can be formed between the both end surfaces 25c, 25d of the shaft portion 25 and the bearing surface 61. Thereby, the both end surfaces 25c and 25d of the shaft portion 25 can be prevented from contacting the bearing surface 61 when the card 5 is rotated, and the frictional resistance can be reduced and the shaving of the shaft portion 25 can be further suppressed. It becomes like this.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in the above embodiment, the front end portion 25a in the insertion direction Y of the shaft portion 25 is tapered, but the tapered surface 65 is formed only on the inner wall portion 62 side of the base 1 so that the front end portion 25a is not tapered. You may make it provide. Even with this configuration, it is possible to reduce galling when the card 5 is assembled, and to suppress a decrease in wear resistance of the shaft portion 25 during driving.

  Further, the base 1, the contact portion 2, the card 5, and other detailed specifications (shape, size, layout, etc.) can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Base 2 Contact part 4 Electromagnet block 5 Card 20 Electromagnetic relay 25 Shaft part 25a Insertion direction front end part 25b Insertion direction rear end surface 60 Bearing hole 61 Bearing surface 62 Inner wall part 64 Peripheral part 65 Tapered surface Y Insertion direction to a bearing hole

Claims (5)

A card that is rotatably supported by a resin base, and the card rotates forward and backward by excitation and non-excitation of an electromagnet block, and a moving body locked to the card is rotated by the card. In an electromagnetic relay in which the contact part is switched on and off by reciprocating in a linear direction according to the movement,
The card has a resin shaft that is rotatably engaged with the bearing hole of the base,
The electromagnetic relay according to claim 1, wherein a rear end surface of the shaft portion in the insertion direction into the bearing hole is formed in parallel with the bearing surface of the bearing hole.   2. The electromagnetic relay according to claim 1, wherein the shaft portion is formed in a tapered shape in which a front end portion in an insertion direction into the bearing hole is tapered toward a distal end side in the insertion direction. The base is open at one end side for inserting the card,
The electromagnetic relay according to claim 2, wherein the inner wall portion of the base has a tapered surface formed between the bearing hole and one end portion of the base and having the same angle as the front end portion of the shaft portion.   The electromagnetic relay according to claim 3, wherein an inner wall portion of the base has a peripheral portion of the tapered surface formed in parallel with the insertion direction.   The shaft portion is formed in a substantially cylindrical shape, and both end surfaces in an orthogonal direction orthogonal to the insertion direction are chamfered in a flat shape. The described electromagnetic relay.

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