JP2005243367A - Polar electromagnetic relay and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact polar electromagnetic relay, of which plural coil terminals are not arranged on the same plane, wherein lead wires of its coil can automatically be connected to the coil terminals without the need for manual operation, its workability is enhanced and its cost is reduced, and to provide a manufacturing method therefor. <P>SOLUTION: The coil 21 is wound around a coil bobbin 9, in such a way that the coil terminals 10, 11 and 16 are held in parallel at an end of the coil bobbin 9 on the same plane perpendicular to the extending direction of the coil bobbin 9, and the lead wires of the coil 21 are wound around the coil terminals 10, 11 and 16 respectively and automatically without manual operation. After the winding, a terminal portion 16a of the coil terminal 16 is bent toward the inner direction (arrow A) along the extending direction. Thereby, required arrangement of the coil terminals 10, 11 and 16 can be achieved, and connection with an external circuit becomes possible. Consequently, automatic wire connection between the lead wires of the coil and the coil terminals 10, 11 and 16 which are not on the same plane, is completed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a polarized electromagnetic relay having a coil terminal portion derived from a coil bobbin and connected to an external circuit, and a manufacturing method thereof.

  In this kind of polarized electromagnetic relay, it is known to bend the leading end portion of the coil lead wire so that the leading end portion of the coil terminal is easily entangled (see Patent Document 1). The electromagnetic relay shown in this document is not particularly intended to reduce the size of the configuration. As a polarized electromagnetic relay intended for miniaturization, an electromagnet block having a coil bobbin, three coil terminals to which a coil lead wire is connected, and a contact terminal having a contact point that contacts and separates according to the excitation state of the coil What is provided is known (see Patent Document 2).

  The polarized electromagnetic relay disclosed in Patent Document 2 will be described with reference to FIGS. 6 and 7, the polarized electromagnetic relay includes an electromagnet block 2, contact mechanisms 3 and 4, an armature block 5, and a movable insulator 14 on a body 1. The electromagnet block 2 has an iron core 8 attached to the inner center of a U-shaped yoke 7 and constitutes an E-shaped magnetic path. The free end of the iron core 8 is a central magnetic pole portion 8a, and both ends of the yoke are opposing magnetic pole portions 7a and 7b facing each other with the central magnetic pole portion 8a therebetween. The central magnetic pole portion 8a and the opposing magnetic pole portions 7a and 7b have opposite polarities due to excitation of a coil (not shown). The iron core 8 is inserted into the center hole 9 a of the coil bobbin 9, and both legs of the yoke 7 are also inserted into the flange portion 9 a on the fixed end side of the iron core 8 of the coil bobbin 9. The flange portion 9a is provided with coil terminals 10 and 11 to which coil lead wires are connected. The coil is wound around the body portion 9 c of the coil bobbin 9.

  The contact mechanisms 3 and 4 are arranged on the side of the coil of the electromagnet block 2 and include fixed contacts 31 and 41 and movable contacts 32 and 42 that can be opened and closed with these contacts. The fixed contacts 31 and 41 are carried on the fixed contact terminals 33 and 43. The movable contacts 32, 42 are carried by one end of the movable springs 34, 44, and the other ends are carried by the movable contact terminals 35, 45. The fixed contact terminals 33 and 43 and the movable contact terminals 35 and 45 are supported by the body 1.

  The armature block 5 is formed in a U shape with armatures 12 and 12 ′ made of two magnetic bodies sandwiching the permanent magnet 13 from the magnetization direction, and is attached to one end of the movable insulator 14. The armature block 5 is combined with the electromagnet block 2 by inserting the same one end of the two armatures 12 into a gap formed by the opposing magnetic pole portions 7 a and 7 b and the central magnetic pole portion 8 a of the electromagnet block 2. The movable insulator 14 has movable contact springs 34 and 44 sandwiched between both wings thereof, and a bearing hole 14 a is pivotally supported on the rotation shaft 1 c of the body 1. The body 1 includes a tunnel 1a. The tunnel 1a is formed by an integrally formed insulating wall 1b, and opens at one end in the longitudinal direction (front side in the figure), and the upper surface opens at the other end (back). The electromagnet block 2 is accommodated in the tunnel 1a so that the opposing magnetic pole portions 7a and 7b and the central magnetic pole portion 8a face the upper surface opening. The body 1 is covered with a cover 15. The coil terminal 16 is connected to a lead wire of a coil for latching, and is attached to the coil bobbin 9 after winding the coil.

  In the above configuration, when the coil is not energized, for example, the armature block 5 is attracted by the magnetic flux of the permanent magnet 13 with the armature 12 on the counter magnetic pole portion 7a and the armature 12 'on the central magnetic pole portion 8a. ing. At this time, the movable contact 32 is closed to the fixed contact 31, and the movable contact 42 is separated from the fixed contact 41. Now, when the coil is energized and the opposing magnetic pole portions 7a and 7b are excited to the N pole and the central magnetic pole portion 8a is excited to the S pole, the armature block 5 is moved together with the movable insulator 14 around the axis 1c, for example, in the positive direction. The armature 12 contacts the central magnetic pole portion 8a, and the armature 12 'contacts the opposing magnetic pole portion 7b. This movement is transmitted to the contact mechanisms 3 and 4 by the movable insulator 14, the movable contact 32 is separated from the fixed contact 31, and the movable contact 42 is closed to the fixed contact 41. Even if the excitation of the coil is stopped, this state is maintained by the magnetic flux of the permanent magnet 13. In this state, when the coil is energized and excitation with the opposite polarity is performed, the armature block 5 is similarly rotated in the opposite direction, and the armatures 12 and 12 'are returned to the original state. Return.

Here, the process of connecting the coil lead wires to the plurality of coil terminals 10, 11, 16 of the coil bobbin 9 will be described with reference to FIGS. The terminal portions 10a, 11a, and 16a of the coil terminals 10, 11, and 16 are connected to an external circuit (not shown). However, in order to reduce the size of the electromagnetic relay itself and the device on which the relay is mounted, the connection of the external circuit is performed. In many cases, the portions are not arranged in a straight line, and accordingly, a plurality of coil terminals are not arranged on the same plane, and one coil terminal 16 is arranged inward of the coil bobbin 9. . For this reason, in the configuration in which all the coil terminals are arranged in a desired arrangement before the coil winding, automatic winding of the coil by the winding machine becomes difficult. Therefore, the coil terminal 16 is mounted after winding, and the coil lead wire is manually connected to the coil terminal 16 (hand-drawn) and soldered, and then the upper end of the coil terminal 16 is bent. Since these steps are performed manually, the workability is poor and the cost is high.
JP 2000-182496 A Japanese Patent Publication No. 3-38690

  The present invention solves the above problem, and in a configuration in which a plurality of coil terminals are not arranged on the same surface for miniaturization, a coil lead wire can be automatically connected to the coil terminal instead of manually. An object of the present invention is to provide a polarized electromagnetic relay that is possible, has high workability, and can be reduced in cost, and a method for manufacturing the same.

  To achieve the above object, the present invention provides an electromagnetic block having a coil bobbin in which an iron core is inserted and a coil is wound outside, and at least three coil terminals to which lead wires of the coil are connected, In the polarized electromagnetic relay having a contact mechanism having a contact point that contacts and separates according to the excitation state of the coil, the coil terminal is on the same plane substantially orthogonal to the extending direction at the end of the extending direction of the coil bobbin. To be connected to the connection part of the external circuit with one end protruding from the coil bobbin and electrically connected to the coil lead wire, and the other end being led out from the other side of the coil bobbin. And the connection part of the external circuit to which at least one terminal part located outside the coil terminal is connected is not on the same plane but inside the extending direction, and the terminal part Along said extension direction is obtained by bending toward the inner side.

  In the above, it is desirable that the coil terminal is formed at the same time as the coil bobbin is formed, and the terminal surface on the bent side of the bent terminal portion is exposed from the molding material.

  Further, the present invention provides a coil bobbin in which the coil terminal is held substantially in parallel on the same plane substantially orthogonal to the extending direction at the end in the extending direction of the coil bobbin in the manufacturing method of the polarized electromagnetic relay as described above. A winding step in which the coil is wound around and the coil lead wire is electrically connected to the coil terminal, and after the winding step, at least one terminal portion located outside the coil terminal is inward along the extending direction. Terminal bending step of bending toward the side.

  According to the present invention, since the coil terminal is held in parallel on the same surface substantially orthogonal to the bobbin extending direction at the end of the coil bobbin, the coil is wound around the coil bobbin, and the coil lead wire is manually attached to the coil terminal. Rather, it can be wound automatically. After the winding, one terminal part of the coil terminal is bent inward along the extending direction, so that the coil terminals can be arranged in a desired arrangement and can be connected to an external circuit. Become. In this way, the coil lead wire can be automatically connected to the coil terminal which is finally not on the same plane, so that the workability is good and the cost can be reduced.

  In addition, when the coil terminal is simultaneously formed on the coil bobbin, the coil terminal portion is easily and accurately bent because the bent terminal surface of the coil terminal portion is exposed from the molding material. be able to.

  Hereinafter, a polarized electromagnetic relay and a manufacturing method thereof according to embodiments of the present invention will be described with reference to the drawings. The basic configuration of the entire polarized electromagnetic relay is the same as that of FIGS. 6 and 7 described above except for a part thereof, so that the duplicated explanation is omitted, and the coil bobbin and coil terminal (especially coil The configuration of the terminal 16 is different). FIG. 1 shows a coil bobbin provided with a coil terminal according to the first embodiment, FIG. 2 shows a state after the coil is wound around the coil bobbin, and FIG. 3 shows a state of terminal bending. The coil bobbin 9 has an inner core inserted therein, and a body portion 9c around which a plurality of coils 21 are wound, and three metal coil terminals 10, 11 to which lead wires of the coils 21 are electrically connected. 16.

  These coil terminals 10, 11, and 16 are formed at the same time as the coil bobbin 9 is formed. The coil terminals 10, 11, and 16 are formed on the coil bobbin 9 substantially in parallel on the same surface substantially orthogonal to the extending direction. It is integrally molded and held. Each coil terminal 10, 11, 16 has one end (upper end) protruding from the flange 9 b of the coil bobbin 9 and electrically connected to the lead wire of the coil 21, and the other end (lower end) being the other (lower end) of the flange 9 b. Terminal portions 10a, 11a, and 16a that are led out from the side and connected to a connection portion of an external circuit (not shown) are configured.

  The coil 21 is wound around the body portion 9c of the coil bobbin 9 by a winding machine, and the lead wire of the coil 21 is connected to the coil terminals 10, 11, and 16. At the time of this winding process, as shown in FIG. 2, since all of the terminal portions 10a, 11a, and 16a are arranged in parallel on the same surface, automatic connection (automatic tangling) can be performed. So you don't have to be bald. After the connection, as shown in FIG. 3, the terminal portion 16a of the coil terminal 16 located outward is bent toward the inner side along the extending direction of the coil bobbin 9 (arrow A). Through this terminal bending step, the terminal portion 16a has a desired terminal arrangement and can be connected to a connection portion of an external circuit (not shown). Thus, the coil lead wires can be automatically connected to the coil terminals 10, 11, and 16 that are not on the same plane, so that the workability is improved and the cost can be reduced.

4A and 4B show a state before and after bending in the above-described terminal bending step. The corresponding portion of the flange portion 9b is a recessed space C in which no molding material exists so that the terminal surface on the bent side of the terminal portion 16a to be bent is exposed from the molding material. Thereby, the bending process of the terminal part 16a can be performed in a state where the bending die D is directly applied to the terminal surface. When terminal bending is performed while pressing the molded product itself, it is difficult to bend with high accuracy due to shrinkage of the molded product, but in this embodiment, a metal terminal that is difficult to contract is bent. Since the bending is performed by directly pressing with the die D, the bending can be performed with high accuracy.
Further, as shown in FIG. 4A, before the terminal portion 16a is bent, the terminal portion 16a does not enter the region W around which the coil 21 of the coil bobbin 9 is wound. Can be easily done.

  FIGS. 5A and 5B show a coil bobbin provided with a coil terminal according to the second embodiment, and shows a state in which a retrofitted terminal portion 16a is disposed after the coil 21 is wound. In this embodiment, the coil bobbin 9 is formed simultaneously with the coil terminals 10, 11, and 16 at the time of forming the bobbin, but the outer coil terminal 16 does not have the terminal portion 16a and is bent at the intermediate side 16b. Is supposed to have up to. The other coil terminals 10 and 11 have terminal portions 10a and 11a in advance. In this embodiment, the coil 21 is wound and the lead wire of the coil 21 is automatically connected (automatically tangled) to each coil terminal 10, 11, 16, and then intermediate between the terminal portion 16 a disposed at a desired position by a jig. The side 16b is bent in the direction of arrow C and joined. For this connection, welding, soldering, caulking, or the like can be used. Also in this embodiment, the same effect as described above can be obtained.

  The present invention is not limited to the configuration of the above embodiment, and various modifications are possible without departing from the spirit of the invention. For example, the configuration of the electromagnetic relay itself is not limited to the above-described form.

The perspective view of the coil bobbin of the polarized electromagnetic relay by 1st Embodiment of this invention. The perspective view of the state which wound the coil around the coil bobbin. The perspective view of the state which bent one coil terminal from the state of FIG. 2, and was set as the desired terminal arrangement | sequence. (A) and (b) are side views before and after bending the coil terminal. It is a perspective view of the coil bobbin of the polarized electromagnetic relay by 2nd Embodiment, (a) (b) shows the state before and after making a desired terminal arrangement, respectively. The exploded perspective view of the conventional polarized electromagnetic relay. The top view except the armature block of the said relay. The perspective view which shows the coil bobbin and coil terminal of the said relay. The perspective view of the state which incorporated the coil terminal in the coil bobbin of the said relay.

Explanation of symbols

2 Electromagnet block 3, 4 Contact mechanism 8 Iron core 9 Coil bobbin 10, 11, 16 Coil terminal 10a, 11a, 16a Terminal part 21 Coil

Claims (3)

An electromagnet block having a coil bobbin in which an iron core is inserted and a coil is wound outside, at least three coil terminals to which the lead wire of the coil is connected, and a contact point that contacts and separates according to the excitation state of the coil In a polarized electromagnetic relay equipped with a contact mechanism with
The coil terminal is held at the end of the coil bobbin in the extending direction, substantially in parallel on the same plane substantially orthogonal to the extending direction, and one end protrudes from the coil bobbin and is electrically connected to the coil lead wire, The other end is derived from the other side of the coil bobbin and becomes a terminal part connected to the connection part of the external circuit,
The connection part of the external circuit to which at least one terminal part located outside the coil terminal is connected is not on the same plane but inward in the extending direction, and the terminal part is inward along the extending direction. A polarized electromagnetic relay characterized by bending toward the other side. The coil terminal is molded at the same time as the coil bobbin molding,
The polarized electromagnetic relay according to claim 1, wherein a bent terminal surface of the bent terminal portion is exposed from the molding material. An electromagnetic block having a coil bobbin in which an iron core is inserted and a coil is wound outside, and at least three coil terminals to which the lead wire of the coil is connected, are contacted and separated according to the excitation state of the coil. A contact mechanism having a contact, one end protrudes from the coil bobbin and is electrically connected to the coil lead wire, and the other end is derived from the other side of the coil bobbin and becomes a terminal part connected to the connection part of the external circuit, In the method of manufacturing a polarized electromagnetic relay in which the connection part of the external circuit to which at least one terminal part located outside the coil terminal is connected is not on the same plane and is in the extension direction,
A coil is wound around a coil bobbin formed by holding the coil terminal at the end in the extending direction of the coil bobbin on the same plane substantially orthogonal to the extending direction, and the lead wire of the coil is electrically connected to the coil terminal. Winding process;
And a terminal bending step of bending at least one terminal portion located outside the coil terminal toward the inward side along the extending direction after the winding step. A method for manufacturing a pole electromagnetic relay.

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