JP4403973B2 - Electromagnetic relay and method of manufacturing armature block used therefor - Google Patents

Description

  The present invention relates to an electromagnetic relay that drives a plurality of contact mechanism units by reciprocating a card by a rotating armature block, and a method of manufacturing an armature block applied thereto.

As this type of conventional multi-pole electromagnetic relay, for example, as shown in Patent Document 1, there is one using an adjustment spring for adjustment of operation characteristics.
JP 2000-257882 A

  However, the operating characteristics of this type of electromagnetic relay are that the magnetic flux varies greatly due to manufacturing variations in the gap between the yoke of the electromagnet block and the armature of the rotating armature block, and the magnetic attraction characteristics are unstable. There was a problem to become. Thus, conventionally, members such as a range plate for adjusting the amount of magnetic flux have been used, but the adjustment is troublesome.

  The present invention has been made in view of the above problems, and can reduce variations in the manufacturing of the gap between the yoke of the electromagnet block and the armature of the rotating armature block, thereby stabilizing the magnetic attraction characteristics of the relay. It is an object of the present invention to provide an electromagnetic relay that can be used and a method of manufacturing an armature block applied to the electromagnetic relay.

In order to achieve the above object, the present invention reciprocates a card with an armature block that rotates by being magnetically attracted to a yoke fixed to the electromagnet block in response to excitation and demagnetization of the electromagnet block. In the electromagnetic relay that opens and closes the contacts by driving a plurality of contact mechanisms arranged in parallel in the moving direction, the armature block is a non-magnetic molded product that holds the back surface of the armature and is connected to the card The sub card has a frame shape, holds the armature in a state where the surface faces the yoke, and on the back surface facing the armature back surface of the sub card, A through hole through which a pin for positioning the armature can be inserted when the subcard and the armature are bonded is provided, and the yoke contact surface of the subcard and the yoke facing surface of the armature In which the contact point step is provided between.
In the above, the rib for setting the level | step difference may be provided in the back surface which faces the said armature back surface of a subcard.
Further, the present invention reciprocates a card with an armature block that rotates by being magnetically attracted to a yoke fixed to the electromagnet block according to excitation and demagnetization of the electromagnet block, and the card moves in the moving direction. In a method of manufacturing an armature block that is applied to an electromagnetic relay that opens and closes contacts by driving a plurality of contact mechanism units arranged side by side , the armature block is bonded and held to the back surface of the armature and connected to a card. A sub-card made of a non-magnetic molded product, the sub-card having a frame shape, holding the armature in a state where its surface faces the yoke, and on the back surface of the armature of the sub-card A through hole is provided in the back surface facing, and a contact point step is provided between the yoke contact surface of the sub card and the yoke facing surface of the armature, and the sub card and the armature are connected to each other. When wearing, set both in the jig, and pass through the pins that operate independently of the jig so that the gap between the yoke of the electromagnet block and the armature due to the step becomes a desired value. It is the manufacturing method of the armature block which inserts in a hole and positions an armature.
In the above description, a stepped jig having a step between a portion that contacts the armature and a portion corresponding to the sub card may be used as the jig, and the contact point step may be formed by the stepped step.
In the above, on the back surface facing the back surface of the armature of the sub card, a protrusion rib for setting the contact point step is provided, and the size of the stepped step of the jig is the upper and lower parts of the armature. Otherwise, the armature may be bonded to the sub card with the protruding rib as a fulcrum.

According to the electromagnetic relay and armature block manufacturing method of the present invention, since the through hole is provided on the back surface facing the armature back surface of the sub card, the through hole is formed when the sub card and the armature are bonded. It is possible to position the armature by inserting the pin. For this reason, it becomes easy to make the contact point step between the yoke contact surface of the sub card and the yoke facing surface of the armature constant, and the manufacturing variation of the facing gap between the yoke and the armature is reduced. Can do. Therefore, the facing gap between the yoke of the electromagnet block and the armature can be set to a desired value, and the magnetic attraction characteristics of the armature block can be stabilized.
In addition, since the ribs for setting the contact point step are provided on the back surface facing the back surface of the armature of the sub card, it is easy to arbitrarily set the facing gap between the yoke and the armature. Become.
In addition, by using a stepped jig having a step between the portion that contacts the armature and the portion corresponding to the sub card as the jig, the contact point step can be formed with high accuracy.
In addition, the size of the stepped step of the jig is different at the upper and lower parts of the armature, and the variation in magnetic attraction characteristics is achieved by bonding the armature with the ridge rib as a fulcrum and tilting the armature with respect to the sub card growing.

  Hereinafter, a multipolar electromagnetic relay according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the electromagnetic relay according to the present embodiment includes a base 10, six sets of contact mechanism portions 20 including a movable contact piece 21 and a fixed contact piece 25, an adjustment spring 30, and a card 40. And a movable armature block 50, an electromagnet block 60, and a cover 70.

  The base 10 is a resin molded product obtained by integrally molding a plurality of insulating walls, and positions and fixes the contact mechanism portion 20, the electromagnet block 60, and the like. A pair of opposite side walls of the base 10 is formed with a pair of shaft holes 11a and 11a for rotatably supporting the armature block 50. A plurality of press-fitting grooves for press-fitting the movable contact piece 21 and the fixed contact piece 25 are formed at the base of the insulating wall of the base 10.

  The movable contact piece 21 constituting the contact mechanism portion 20 has a movable contact 22 fixed by crimping at the upper end thereof, and a press-fit portion bent by punching a plate-like conductive material and a terminal portion 24 fixed at the lower end thereof. The movable contact piece 21 has an upper edge 21 a that can be locked to the card 40. On the other hand, the fixed contact piece 25 constituting the contact mechanism unit 20 has a fixed contact 26 fixed by caulking at an upper end thereof, and a press-fitting portion and a terminal portion 28 are integrally formed at the lower end thereof. Then, the movable contact piece 21 and the fixed contact piece 25 are press-fitted into the press-fitting groove formed in the base 10 from the side, so that the movable contact 22 and the fixed contact 26 are opposed to each other so that the contact mechanism portion 20 can be separated. Form.

  The card 40 has a frame shape that is slidably fitted to the upper part of the insulating wall of the base 10. The card 40 is formed with a locking hole 41 that is locked to the armature block 50 at one end side edge portion, and a plurality of locking holes 42 that are locked to the upper end edge portion 21 a of the movable contact piece 21. .

  The armature block 50 includes an armature 51 made of a movable iron piece, a permanent magnet 52 fixed to one surface of the armature block, and a sub-card 53 made of a non-magnetic material that holds the armature 51 by bonding. The sub card 53 is integrally formed of a resin material in a substantially frame shape. The sub card 53 has a locking projection 53a projecting from the upper edge of the frame body, and a pair of shaft portions 54 projecting from the same axial center on both side end surfaces thereof. When the shaft portion 54 is fitted into the shaft hole 11 a of the base 10, the armature block 50 is rotatably supported, and the locking protrusion 53 a is locked to the locking hole 41 of the card 40. As a result, the sub card 53 and the card 40 are connected. Thereby, the rotation operation of the armature block 50 is converted into the reciprocation operation of the card 40.

  The electromagnet block 60 has a structure in which an iron core 63 is inserted into a center hole of a spool 62 around which a coil 61 is wound, and yokes 64 and 65 bent in a substantially L shape are fixed by caulking at both protruding ends. The spool 62 has flange portions at both ends, and a pair of coil terminals 66 and 66 are press-fitted into the flange portion. The coil terminals 66 and 66 are soldered with both end portions of the coil 61 being curled. The electromagnet block 60 is positioned and fixed to the base 10 so that the upper and lower ends of the armature 51 are opposed to the free ends of the yokes 64 and 65 so that they can be alternately contacted and separated.

  Next, the operation of the electromagnetic relay according to the present embodiment will be described with reference to FIGS. 3 (a) and 3 (b). FIG. 3A shows a state where the electromagnetic relay is OFF. When no voltage is applied to the coil 61 of the electromagnet block 60, the upper end of the armature 51 is attracted to the yoke 64 of the electromagnet block 60 based on the magnetic force of the permanent magnet 52. The movable contact 22 and the fixed contact 26 of each contact mechanism unit 20 are in contact with each other.

  FIG. 3B shows a state where the electromagnetic relay is ON. The coil 61 is excited by applying a voltage so that a magnetic flux that cancels the magnetic flux of the permanent magnet 52 is generated. Thus, against the magnetic force of the permanent magnet 52, the armature block 50 rotates about the shaft portion 54 of the sub card 53, and the lower end portion of the armature 51 is attracted to the yoke 65. For this reason, the card 40 slides in the horizontal direction against the spring force of the adjustment spring 30. As a result, each movable contact piece 21 rotates, and the movable contact 22 contacts and separates from the fixed contact 26. Then, when the above-described excitation is released, the armature 51 reversely rotates and returns based on the movable contact piece 21, the spring force of the adjustment spring 30, and the magnetic force of the permanent magnet 52. For this reason, the card | curd 40 returns to an original state, and the movable contact piece 21 of each contact mechanism part 20 returns. As a result, the movable contact 22 and the fixed contact 26 come in contact with each other and return to the original state. Note that the permanent magnet 52 in the armature block 50 is mounted at a position slightly displaced from the shaft portion 54 that is the center of rotation, so that the state shown in FIG.

  In the electromagnetic relay configured as described above, the magnetic attractive force at the contact point A between the yoke 64 of the electromagnet block 60 and the armature 51 of the armature block 50 in FIG. 3A is the distance between the yoke 64 and the armature 51. It is greatly influenced by. Therefore, in order to stabilize the operation characteristics of the electromagnetic relay from OFF to ON, it is necessary to stabilize the distance between the yoke 64 and the armature 51.

  Therefore, as shown in an enlarged view of the contact point A in FIG. 4, in the present invention, the interval between the yoke 64 and the armature 51 is a non-magnetic molded product in the armature block 50 in the OFF state of the electromagnetic relay. The thickness is determined by the thickness of the sub card 53, more specifically, by the protruding height of the frame portion 53d of the sub card 53 from the surface of the armature 51. This protruding height is a contact point step B between the yoke contact surface 53 b of the sub card 53 and the yoke facing surface 51 b of the armature 51. Means for stabilizing the contact point step B will be described below with reference to FIGS.

  FIGS. 5A, 5B, and 5C respectively show the conventional configuration of the armature block 50, and the configurations of the first and second embodiments of the present invention. In the conventional configuration of FIG. 5A, the armature block 50 'is configured by bonding the components as they are, that is, by bonding the armature 51 to the sub card 53'. In the armature block 50 of the first embodiment shown in FIG. 5B, a through hole 53c is provided on the back surface 53e facing the back surface of the armature of the sub card 53, and the sub card 53 and the armature 51 are bonded. Sometimes, a pin is inserted into the through hole 53c from the back side of the sub card 53, and the armature 51 is positioned and bonded in this state, so that the contact point step B, that is, from the armature 51 of the frame 53d The protruding height can be precisely set to a desired value. In the armature block 50 of the second embodiment shown in FIG. 5C, a through-hole 53c is provided in the back surface 53e facing the back surface of the armature of the sub card 53, and the back surface 53e further includes a back hole 53c. When the sub card 53 and the armature 51 are bonded to each other, a rib is inserted into the through hole 53c to position the armature 51, and the rib 55f is provided. Therefore, the posture of the armature 51 changes, and the contact point step B can be set freely.

  A specific method of bonding the sub card 53 and the armature 51 according to the first embodiment will be described with reference to FIGS. A pair of jigs 81 and 82 is used to bond the sub card 53 and the armature 51. First, as shown in FIG. 6, the sub card 53 and the armature 51 with the permanent magnet 52 bonded are set in the jigs 81 and 82, and the pins 83 and 84 that operate independently of the jigs 81 and 82 are set. Is inserted into the through hole 53c of the sub card 53. As the jig 81, a stepped jig in which a certain step C is formed from a convex part 81 b provided above and below the cavity 81 a and in contact with the armature 51 and a concave part 81 c provided above and below the same is used. This step C is what makes the contact point step B. The jig 82 has a concave shape 82 a that is in contact with the back side of the sub card 53 and a hole through which the pins 83 and 84 are inserted.

  Next, as shown in FIG. 7, the jigs 81 and 82 are closed, the armature 51 is pressed from the back surface by the pins 83 and 84, and the armature 51 is pressed against the convex portion 81b to be positioned. The jig 82 presses the sub card 53 from the back side. In this state, the gap between the armature 51 and the sub card 53 is filled with an adhesive and solidified to bond them together. By bonding the armature 51 and the sub card 53 using the stepped jig 81 having such a step C, the armature block 50 having a certain contact point step B is formed as shown in FIG. It can be manufactured with high accuracy. In FIG. 8, reference numeral 55 denotes an adhesive layer. By the way, in the conventional configuration, the contact point step varies depending on the shape of the part and the thickness of the adhesive layer.

  Further, by providing the stepped jig 81 having a plurality of different steps C as described above, the magnetic attraction characteristics can be freely changed in accordance with the magnet strength of the relay and the strength of the spring. Can do.

  A specific method of bonding the sub card 53 and the armature 51 according to the second embodiment will be described with reference to FIGS. Here, a rib 53f is provided on the back surface 53e facing the back surface of the armature of the sub card 53, and the size of the stepped steps of the jigs 81 and 92 to be used is above and below the armature 51. In contrast, the contact point step different from the above can be set by adhering the armature 51 to the sub card 53 with the protruding rib 53f as a fulcrum.

  Specifically, as shown in FIG. 9, convex portions 81b and 81b are respectively formed on the upper side and the lower side of the cavity 81a of the jig 81, and the step C ′ between the lower convex portion 81b and the concave portion 81c is formed on the upper side. It is larger than the step C ″ between the convex portion 81b and the concave portion 81c. Other configurations of the jig are the same as those of the first embodiment. As shown in FIG. 10, the jigs 81 and 82 are closed, and the back surface of the armature 51 is pressed by the pins 83 and 84, so that the armature 51 is inclined with respect to the sub card 53 with the ridge rib 53f as a fulcrum. In this state, the armature 51 and the sub card 53 are bonded with an adhesive. As a result, as shown in FIG. 11, an armature block 50 having a contact point step B ′ different from that of the first embodiment can be manufactured.

  FIG. 12 shows an armature block 50 according to a modification of the second embodiment. In this example, the position of the protruding rib 53f of the sub card 53 is different from the above, and thereby the amount of inclination of the armature 51 is different, so that the contact point step is different from the above. Thus, the variations of the armature block 50 are varied. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made without departing from the spirit of the invention.

The disassembled perspective view of the electromagnetic relay which concerns on embodiment of this invention. The schematic sectional side view of the electromagnetic relay. (A) (b) is operation | movement explanatory drawing of the state of the electromagnetic relay OFF and ON. The enlarged view of the contact point A of Fig.3 (a). (A) is a figure which shows the assembly structure of the conventional armature block, (b) is a figure which shows the assembly structure of the armature block of Embodiment 1, (c) shows the assembly structure of the armature block of Embodiment 2. Figure. The figure which shows the manufacturing method of the armature block by Embodiment 1, and shows the state before closing a jig | tool. The figure which shows the state which closed the jig | tool in the same as the above. Sectional drawing of the armature block manufactured by the same as the above. The figure which shows the manufacturing method of the armature block by Embodiment 2, and shows the state before closing a jig | tool. The figure which shows the state which closed the jig | tool in the same as the above. Sectional drawing of the armature block manufactured by the same as the above. Sectional drawing of the armature block manufactured by the modification of Embodiment 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Contact mechanism part 30 Adjustment spring 40 Card 50 Armature block 60 Electromagnet block 51 Armature 51b Armature yoke opposing surface 52 Permanent magnet 53 Subcard 53b Subcard yoke contact surface 53c Through hole 53e Subcard armature back surface Back face 53f Ribs 64, 65 Yoke 81, 82 Jig 81b Convex part abutting on armature 81c Concave part 83, 84 Pin A Contact point B, B 'Contact point step C, C', C '' Step

Claims (5)

A plurality of contacts arranged side by side in the direction of movement by the card by reciprocating the card with the armature block that rotates by being magnetically attracted to the yoke fixed to the electromagnet block according to the excitation and demagnetization of the electromagnet block In an electromagnetic relay that opens and closes contacts by driving the mechanism,
The armature block has a sub-card made of a non-magnetic molded product that holds the back surface of the armature adhered and is connected to the card.
The sub card has a frame shape, and holds the armature in a state where the surface thereof faces the yoke,
A through-hole through which a pin for positioning the armature can be inserted when the subcard and the armature are bonded to the back surface of the subcard facing the armature back surface.
An electromagnetic relay characterized in that a contact point step is provided between the yoke contact surface of the sub-card and the yoke-facing surface of the armature.   2. The electromagnetic relay according to claim 1, wherein a protrusion rib for setting the step is provided on a back surface of the sub card facing the back surface of the armature. A plurality of contacts arranged side by side in the direction of movement by the card by reciprocating the card with the armature block that rotates by being magnetically attracted to the yoke fixed to the electromagnet block according to the excitation and demagnetization of the electromagnet block In the manufacturing method of the armature block applied to the electromagnetic relay that opens and closes the contact by driving the mechanism part,
The armature block has a sub-card made of a non-magnetic molded product that holds the back surface of the armature adhered and is connected to the card.
The sub card has a frame shape, and holds the armature in a state where the surface thereof faces the yoke,
A through hole is provided on the back surface of the sub card facing the armature back surface,
A contact point step is provided between the yoke contact surface of the sub card and the yoke facing surface of the armature,
When bonding the sub-card and the armature, set both in the jig, and the jig so that the gap between the yoke of the electromagnet block and the armature due to the step becomes a desired value A method of manufacturing an armature block, wherein an armature is positioned by inserting an independently operating pin into the through hole.   The step of the contact point is formed by using a stepped jig having a step between a portion contacting the armature and a portion corresponding to the subcard as the jig. Method for manufacturing an armature block. On the back side facing the back side of the armature of the sub card, provided with a rib rib for setting the contact point step,
5. The size of the stepped step of the jig is different between the upper and lower parts of the armature, and the armature is bonded to the sub card while being inclined with respect to the projecting rib as a fulcrum. The manufacturing method of the armature block of description.

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