JP2004259704A - Relay circuit device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relay circuit device in which the number of members and the number of connection points between the members are reduced, and in which reduction of a manufacturing cost is possible by simplification of manufacturing process. <P>SOLUTION: A cabling member group 3 is composed of a plurality of metal plate shape cabling members, and the common base plate is formed by carrying out a resin molding at a prescribed portion of this cabling member group 3. By appropriately cutting the external tie bar 301 and the internal tie bar 303 of the cabling member group 3, change of circuits is made possible by making cabling pattern of the cabling member group 3 free. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a relay circuit device having a plurality of relays (electromagnetic relays).

  A conventional relay circuit configured by connecting a plurality of relays is configured by manufacturing a wiring board on which predetermined wiring is made and a plurality of relay mounting sockets are fixed, and mounting a relay on each socket. It is also possible to omit the socket and directly fix the external connection terminals (contact terminals, coil terminals) of the relay to the wiring of the wiring board by soldering or the like.

  As is well known, a conventional relay includes a contact member including a movable contact member and a fixed contact member, a magnetic path member for generating a magnetic force for driving the movable contact member, and a magnetic flux for driving the movable contact member in the magnetic path member. And a contact member, an electrically insulating stem that ultimately supports the magnetic path member and the coil, and is integrally formed with the stem and electrically connected to both ends of the coil and the contact member. A wiring member (a wiring member in a relay) whose end forms an external connection terminal is provided.

  In a wiring board for a conventional relay circuit, a current flowing through a contact point of a relay is usually relatively large as compared with that of a transistor. Therefore, cable wiring is performed along a back surface (also referred to as an anti-mounting surface in this specification) of the wiring board. Since the coil current is relatively small, the coil current may be formed of a conductor pattern patterned on a wiring board.

Japanese Patent Application Laid-Open No. 2000-164098 filed by the present applicant proposes a relay in which a wiring member (a wiring member in a relay) is integrally formed with a stem by a so-called lead frame technique.
JP 2000-164098 A

  However, in the above-described conventional relay circuit device, the number of members and the number of connection points between members are large, the manufacturing process is complicated, and there is a limit in responding to the demand for reduction in manufacturing cost.

  The present invention has been made in view of the above problems, and has as its object to provide a relay circuit device that can reduce the number of members and the number of connection points between members, and can reduce a manufacturing cost by simplifying a manufacturing process. .

  The invention according to claim 1 has a plurality of electromagnetic relays, and a wiring member group to which the plurality of electromagnetic relays are respectively connected, wherein the wiring member group is such that the wiring members are connected by tie bars, The circuit is formed so that the circuit can be changed by cutting.

  According to a second aspect of the present invention, there is provided the relay circuit device according to the first aspect, wherein the wiring member group comprises a stamped product.

  According to a third aspect of the present invention, in the relay circuit device according to the first or second aspect, the wiring member group includes a wiring member to which a coil of the electromagnetic relay is connected; It is characterized by including the wiring member including a terminal portion for a movable contact, and the wiring member including a fixed contact member of the electromagnetic relay.

  The invention according to claim 4 is the relay circuit device according to any one of claims 1 to 3, wherein the wiring member group includes the wiring member to which a fuse is connected. .

  As is apparent from the above description, according to the first aspect of the present invention, since the circuit can be changed by cutting the tie bars between the wiring members in the wiring member group, the degree of freedom in circuit design can be increased. Thus, the number of parts can be reduced.

  According to the second aspect of the present invention, since the wiring member group is a stamped product, the wiring change of the relay circuit can be realized only by changing the stamping pattern. It can be manufactured in a manufacturing process. For this reason, manufacturing costs can be reduced.

  According to the third aspect of the present invention, since each wiring member including the coil of the electromagnetic relay, the terminal portion for the movable contact, and the fixed contact member is provided, unnecessary wiring members can be easily removed by cutting the tie bar. .

  According to the fourth aspect of the present invention, since the wiring member group is provided with the wiring member to which the fuse is connected, the electromagnetic relay and the fuse can be integrally connected by the wiring member. It is not necessary to connect the wires. For this reason, the workability of manufacturing the relay circuit device can be improved.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a side view of the relay circuit device, FIG. 2 shows a front view of the common base plate 1 and the wiring member group 3, and FIG. 3 shows a front view of the relay unit 2, and FIG. The figure is shown in FIG.

  The common base plate 1 made of a resin forming the wiring board has a substantially rectangular resin flat plate shape as viewed from the front as shown in FIG. Has a wall portion 12 protruding forward from the component mounting surface J at the lower end thereof.

  On the component mounting surface J of the common base plate 1, five relay circuit sets each including one relay unit 2, a fuse 4, and a resistor 5 are arranged.

  The common base plate 1 is integrally formed with wiring member groups 3 (see FIG. 4) each extending in a predetermined shape.

  The wiring member group 3 is a general term for a required number of plate-shaped wiring member groups (also referred to as busbars) made of a copper-based alloy, and each wiring member (busbar) is substantially provided in the common baseplate 1 except for the end portion. 1 is buried substantially parallel to the component mounting surface.

  A part of the end of the wiring member group 3 protrudes downward from the wall 12 of the common base plate 1 to form an external connection terminal group 30. The external connection terminal group 30 includes, in addition to the power supply terminal 311 and the installation terminal 312, a coil terminal for connecting the coil of the relay unit 2 to the outside, and a contact for connecting a fixed contact member or a movable contact member described below to the outside. It has relay terminals 313 to 326 formed of terminals. The power terminal 311, the installation terminal 312, and the relay terminals 313 to 326 each constitute an external connection terminal according to the present invention.

  Another part of the end of the wiring member group 3 protrudes at right angles to the component mounting surface J in the component mounting surface J of the common base plate 1 to form an internal connection terminal group. The internal connection terminal group includes a fixed contact terminal portion 331 serving as a fixed contact member, a movable contact terminal portion 332 welded to the movable contact terminal of the relay unit 2, and a coil to which both ends of the coil of the relay unit 2 are individually connected. A set including connection terminal portions 333 and 334, fuse terminal portions 335 and 336 supporting both ends of the fuse 4, and resistor terminal portions 337 and 338 supporting both ends of the resistor 5 is provided. The fuse terminal portions 335 and 446 protrude from the fuse accommodating window portion 11 and hold both ends of the fuse 4.

  The relay unit 2 will be described in more detail.

  The relay unit 2 has a structure in which a fixed contact member and a stem made of an electrically insulating material are omitted from a normal electromagnetic relay to be precise, and a fixed contact member which is an end of one wiring member of the wiring member group 3 is used. A single contact type electromagnetic relay having an oscillating movable contact together with a fixed contact member constituted by a terminal portion 331 and a common base plate 1 forming a stem is constituted.

  The fixed contact terminal portion 331 that forms a fixed contact member protrudes from the common base plate 1 at right angles thereto. The contact metal of the fixed contact terminal portion 331 is built up as a fixed contact.

  Each relay unit 2 has an L-shaped plate-shaped movable contact member 21 when viewed toward the component mounting surface J, and a yoke (L-shaped plate-shaped soft iron plate when viewed toward the component mounting surface J). A magnetic path member) 22, a fixed core (magnetic path member) 24 made of a cylindrical soft iron material inserted into a bobbin around which a coil 23 described later is wound, a movable iron piece (magnetic path member) 25 made of a flat soft iron material, It has a coil 23 wound around a bobbin to form a magnetic flux in the magnetic path member 22.

  The L-shaped plate-shaped movable contact member 21 is composed of a fixed side and a swinging side extending from one end of the fixed side at a right angle to the fixed side. It is formed by bending. At the contact portion of the swinging side portion of the movable contact member 21, a contact metal as a movable contact facing the contact (fixed contact) of the fixed contact terminal portion 331 is built up on the distal end portion 210. That is, the movable contact member 21 has an L-shaped bent shape when viewed toward the component mounting surface J of the common base plate 1 and extends at right angles to the component mounting surface J. Consists of boards.

  The movable iron piece 25 is in close contact with and fixed to the swinging side of the movable contact member 21 and extends along the swinging side. One side of the L-shaped plate-shaped yoke 22 is fixed by caulking to the fixed side of the movable contact member 21, and the other side of the L-shaped plate-shaped yoke 22 is on the opposite side to the swinging side of the fixed side of the movable contact member 21. Extends substantially in parallel with the swinging side and the movable iron piece 25 from the end of the movable iron piece 25. Therefore, the movable iron piece 25 and the yoke 22 are arranged in a U-shaped plate as a whole, and the other side of the yoke 22 and the movable iron piece 25 are magnetically short-circuited. 22 is fixed to the other side. Therefore, the L-shaped plate-shaped yoke 22, the fixed core 24, and the movable iron piece 25 constitute a square-shaped gap-closed magnetic circuit having a gap between the movable iron piece 25 and the fixed core 24 as a whole. The movable contact member 21 excellent in the above-mentioned condition secures the above-mentioned gap. Reference numeral 400 denotes a stopper member inserted into the common base plate 1 to restrict the displacement of the movable contact member 21 so that the gap does not become larger than a predetermined value.

  In the wiring member group 3, the terminal portion 332 for the movable contact, which is the end of the wiring member for connecting to the movable contact member 21, is close to or adjacent to the fixed side of the movable contact member 21 and is perpendicular to the common base plate 1. The fixed side portion of the movable contact member 21 is fixed to the movable contact terminal portion 332 by welding or the like. The yoke 22 has a pair of legs 211 and 212 protruding toward the common base plate 1 and legs 213 slightly separated from the pair of legs 211 and 212, and these legs 211 and 212 are recessed in the common base plate 1. The legs 213 are individually press-fitted into the recesses 111 and 112 formed in the common base plate 1. Therefore, the movable contact member 21 and the yoke 22 each having an L-shape and fixed by caulking are supported by the common base plate 1 at three points.

  When the coil 23 is energized, the movable iron piece 25 is attracted to the fixed core 24, and the swinging side of the movable contact member 21 to which the movable iron piece 25 is fixed is located between the fixed side and the swinging side of the movable contact member 21. It swings in parallel with the component mounting surface J with the corner between them as a fulcrum, and comes into close contact with the fixed contact terminal portion 331, that is, the fixed contact member according to the present invention. When the energization of the coil 23 is stopped, the magnetic force acting on the movable iron piece 25 disappears, and the swinging side of the movable contact member 21 is separated from the fixed contact terminal portion 331 by its own elastic force.

  The relay unit 2 is characterized in that one side of the yoke 22 and a movable iron piece 25 are fixed to the movable contact member 21, and a fixed core 24 is fixed to the other side of the yoke 22. Is attached. That is, the magnetic path member and the coil 23 of the relay unit 2 are finally held by the movable contact member 21. Therefore, the relay unit 2 is completed in a state where the magnetic path member and the coil 23 are finally held by the movable contact member 21 in advance, and the relay unit 2 is set at a predetermined position on the common base plate 1. The normal electromagnetic relay composed of the fixed contact member, the stem and the relay unit 2 can be obtained simply by pressing the portions 211 and 212 into the two concave portions of the common base plate 1 and welding the movable contact member 21 and the terminal portion 332 for the movable contact. Can be completed.

  The coil connection terminal portions 333 and 334 are formed by ends of wiring members for coil connection in the wiring member group 2, and these coil connection terminal portions 333 and 334 are perpendicular to the component mounting surface of the common base plate 1. The coil 23 protrudes from the common base plate 1 and both ends of the coil 23 are wound and connected.

  The fuse terminal portions 335 and 336 supporting both ends of the fuse 4 are formed by ends of a wiring member for connecting a fuse in the wiring member group 2, and these fuse terminal portions 335 and 336 are components of the common base plate 1. Projection is made from the common base plate 1 so as to be perpendicular to the mounting surface. Both ends of the fuse 4 are formed in a plate shape, and are sandwiched between the tip ends of the forked fuse terminal portions 335 and 336, respectively.

  The resistor terminal portions 337 and 338 that support both ends of the resistor 5 are formed by ends of a wiring member for connecting a resistor in the wiring member group 2, and these resistor terminal portions 337 and 338 are components of the common base plate 1. It projects from the common base plate 1 so as to be perpendicular to the mounting surface J. Both ends of the resistor 5 are sandwiched between tip portions of bifurcated resistor terminals 337 and 338, respectively. Reference numeral 1000 denotes a punched portion for cutting a tie bar.

  A method for manufacturing the above-described relay circuit device will be described below.

  FIG. 4 shows a stamped piece for forming the wiring member group 3.

  This press-punched piece is formed by punching a copper alloy thin plate wound around a drum into a so-called IC lead frame shape, and a group of internal connection terminals described above, that is, a fixed contact terminal portion 331 forming a fixed contact member, and a movable contact of the relay unit 2. Movable contact terminal portion 332 welded to the terminal, coil connection terminal portions 333 and 334 to which both ends of the coil of relay unit 2 are individually connected, fuse terminal portions 335 and 336 supporting both ends of fuse 4, resistor 5 Are respectively bent at right angles by five resistor terminal portions 337 and 338 supporting both ends.

  The wiring members constituting the wiring member group 3 are integrated with a square frame 300 surrounding the wiring member group 3 by an external tie bar 301 and further integrated by an internal tie bar 302 which is cut and removed later.

  After that, the common base plate 1 is formed by performing resin molding on a predetermined portion of the wiring member group 3, and the external tie bar 301 and the internal tie bar 302 are cut and removed, thereby completing the wiring of the wiring member group 3. At this time or later, the wiring pattern can be changed by appropriately cutting a part of the wiring member group 3.

  Next, the resistor 5 is pressed into the resistor terminal portions 337 and 338, and the resistor 5 is held between the resistor terminal portions 337 and 338. Similarly, the fuse 4 is held between the fuse terminal portions 335 and 336. Let it.

  Next, the relay unit 2 pre-assembled by the method described above is assembled to the common base plate 1, and the movable contact member 21 is welded to the movable contact terminal portion 332.

  Finally, the common base plate 1 on which the circuit components are assembled is housed in a case (not shown), and the assembly is completed. The power terminal 211, the ground terminal 212, and the relay terminals 213 to 226, that is, the external ground terminal according to the present invention, constitute a connector of the above case.

It is a side view showing one example of a relay circuit device (without a case) of the present invention. It is a front view of a common base plate and a wiring member group. It is a front view of a relay unit. It is a front view of the semi-finished product (after press punching) of a wiring member group.

Explanation of reference numerals

REFERENCE SIGNS LIST 1 common base plate 2 relay unit 3 wiring member group J component mounting surface of common base plate 4 fuse 5 resistor 30 external connection terminal group 301 external tie bar 302 internal tie bar 311 power terminal 312 ground terminal 313 to 326 relay terminal 331 fixed contact terminal portion (Fixed contact member)
332 Movable contact terminal portion 333, 334 Coil connection terminal portion 335, 336 Fuse terminal portion 337, 338 Resistor terminal portion 21 Movable contact member 22 Yoke 23 Coil 24 Fixed core (magnetic path member)
25 Movable iron pieces (magnetic path members)

Claims (4)

A plurality of electromagnetic relays, and a wiring member group to which the plurality of electromagnetic relays are respectively connected,
The wiring member group,
A relay circuit device, wherein the wiring members are connected by a tie bar, and the circuit can be changed by cutting the tie bar. The relay circuit device according to claim 1,
The said wiring member group consists of press-punched goods, The relay circuit apparatus characterized by the above-mentioned. A relay circuit device according to claim 1 or claim 2,
The wiring member group includes the wiring member to which a coil of the electromagnetic relay is connected, the wiring member including a terminal portion for a movable contact of the electromagnetic relay, and the wiring member including a fixed contact member of the electromagnetic relay. A relay circuit device comprising: The relay circuit device according to claim 1, wherein:
The said wiring member group is provided with the said wiring member to which a fuse is connected, The relay circuit device characterized by the above-mentioned.

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