JPH06111700A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To improve the withstand voltage between an a coil, a fixed contact, and a moving contact, increase the surface area of a fixed terminal, improve the heat dissipation characteristic, and improve the opening/closing capacity of contacts. CONSTITUTION:A coil 8 is wound on a coil spool 6 planted with a U-shaped iron core 7 and coil terminals 9, a coil block body 2 arranged with a permanent magnet in a hole section 10 formed in the center of the coil spool 6 is covered with an insulator base 1 and a base case 3, and the coil 8 is shielded from a terminal section. The moving contact of a moving contact spring block 4 is arranged to face a fixed contact 18 fitted on the upper face of the insulator base 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay having an improved insulator base wrapping a coil block.

[0002]

2. Description of the Related Art Conventionally, such an electromagnetic relay has a movable contact spring block including an armature, a coil block in which the movable contact spring block is arranged on an upper surface through a permanent magnet, and both blocks are mounted. It has an insulator base provided with various terminals, is covered with a cover, and is then resin-sealed.

FIG. 4 is an exploded perspective view of an electromagnetic relay showing such a conventional example. As shown in FIG. 4, the conventional electromagnetic relay is roughly classified into the movable contact spring block 4
A coil block body 2, a permanent magnet 5 for supporting the tilting motion of the movable contact spring block 4 on the coil block body 2, and an insulator base 1A enclosing the coil block body 2 having the movable contact spring block 4 mounted thereon. , And a cover (not shown). The movable contact spring block 4 is composed of a movable contact spring 13 having a movable contact 15 at the tip and a hinge spring 14 at the center, an armature 11, and an insulating fixed body 12 integrally forming these. In the coil block body 2, a coil 8 is wound around a coil spool 6 made of an insulator in which a U-shaped iron core 7 and a coil terminal 9 are embedded, and a permanent magnet insertion hole 10 provided in a central portion inside the spool 6 is provided. It is formed by fixing the permanent magnet 5. Further, the insulator base 1A is formed by implanting a fixed contact terminal 19A to which a fixed contact 18A is fixed, a neutral terminal 20A and a coil lead-out terminal 17A in a box-shaped insulating block 16A having an open top. In assembling such an electromagnetic relay,
After the coil block body 2 is fitted and fixed inside the insulator base 1A, the coil terminal 9 and the coil lead-out terminal 17A are joined by a method such as welding. Next, when mounting the movable contact spring block 4, the hinge spring 14 and the neutral terminal 20 are attached.
Fix A, and then attach the cover to complete. In the electromagnetic relay described above, a protrusion (not shown) serving as a fulcrum for tilting the movable contact spring block 4 is provided at the center of the lower side of the armature 11 and is in contact with the upper surface of the permanent magnet 5. By the tilting movement of the movable contact spring block 4, the movable contact 15 is turned on / off with the fixed contact 18A attached to the upper surface of the insulator base 1A.

[0004]

SUMMARY OF THE INVENTION An electromagnetic relay using the above-described conventional insulator base has a coil terminal and a coil lead-out terminal coupling portion, a movable contact and a fixed contact, a coil body, a movable contact and a fixed contact. Since and are close to each other and the insulation distance between the coil and the contact cannot be sufficiently secured, there is a drawback that the withstand voltage between the coil and the contact is limited. In addition, since the coil spool is inserted from above the insulator base in the conventional electromagnetic relay, the surface area of the fixed terminal is restricted by the shape or size of the coil spool and cannot be made larger than necessary, resulting in poor heat dissipation characteristics. However, there is a drawback that the switching capacity of the contacts is limited.

It is an object of the present invention to provide an electromagnetic relay which increases the withstand voltage between the coil and the contact, improves the heat dissipation characteristics of the fixed terminal, and improves the switching capacity of the contact.

[0006]

The electromagnetic relay of the present invention comprises:
A coil block body in which a coil is wound around a coil spool in which a U-shaped iron core and a coil terminal are integrally molded with an insulator, a permanent magnet arranged in a central hole portion of the coil spool, and both pole portions are provided on both end surfaces of the iron core. Insulating and fixing a movable contact spring and a hinge spring, which have armatures arranged to face each other and interlock with a tilting motion in which both ends of the armature come into contact with and separate from both end surfaces of the iron core, and have movable contacts at their tips. A movable contact spring block integrally molded with the fixed contact, a fixed terminal provided with a fixed contact opposed to the movable contact, a neutral terminal connected to one end of the hinge spring portion, and a coil lead-out terminal connected to the coil terminal. A substantially box-shaped insulator base having a lower surface opening integrally molded with an insulator, and an upper surface opening molded with the insulator and combined with the insulator base. And a base case configured to cover by the insulator base and the base case the coil block body from above and below.

[0007]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of the present invention with a movable contact spring block and a permanent magnet removed from the electromagnetic relay. As shown in FIG. 1, in this embodiment, an insulator base 1, a coil block body 2 attached from the lower side of the base 1, and a coil block body that covers the lower side of the coil block body 2 together with the base 1. It includes a base case 3 that shields 2, a movable contact spring block 4 and a permanent magnet 5 that are the same as those in the conventional example (FIG. 4) described above, and a cover (not shown). The movable contact spring block 4 (not shown)
For reference, the numbers in FIG. 4 are cited for convenience of explanation. First, in the coil block body 2, a coil 8 is wound around a coil spool 6 made of an insulator in which a U-shaped iron core 7 and a coil terminal 9 are embedded, and a permanent magnet insertion hole 10 provided in a central portion inside the iron core 7. The permanent magnet 5 is fixed to. In addition, the insulator base 1 is a fixed connection terminal 1 to which a fixed contact 18 is fixed.
9, the neutral terminal 20 and the coil lead-out terminal 17 are embedded in the insulating block 16. This insulation block 16
Has two holes 21 for the iron core corresponding to the end faces of the U-shaped iron core 7 on the upper surface and has a hole 22 for the magnet corresponding to the permanent magnet 5 at the center of the upper surface. Has been done.

In the assembly of such an electromagnetic relay, first, the coil block body 2 is inserted and fitted through the lower opening of the insulator base 1, and the coil terminal 9 and the coil lead-out terminal 17 are joined by welding or the like. Next, the lower portion of the coil block body 2 is covered with a base case 3 made of an insulator. At this time, the base case 3 is fixed to the insulator base 1 by means such as fitting. Further, the movable contact spring block 4 (not shown) is mounted from above the insulator base 1, but at this time, the hinge spring 14 and the neutral terminal 20 are fixed to each other. Finally, a cover (not shown) is attached to complete the process. In addition, armature 1
A protrusion (not shown) that serves as a fulcrum for tilting the movable contact spring block 4 is provided at the center of the lower side of 1, and is in contact with the upper surface of the permanent magnet 5.

FIG. 2 is a top and back perspective view of the insulator base shown in FIG. As shown in FIG. 2A, the insulator base 1 is completed by bending the implanted terminals 17, 19, 20 downward. Also, FIG.
As shown in (b), the fixed contact terminals 19 implanted in the insulating block 16 correspond to the respective fixed contacts 18.

FIG. 3 is a perspective view of the insulator base shown in FIG. 1 combined with a coil block body. As shown in FIG. 3, the insulator base 1 has only the iron core protruding from the core hole 21 on the upper surface thereof. Therefore, the main body of the coil 8 of the coil block 2 is completely covered with the insulating block 16 and the base case 3. Further, in this embodiment, since the coil block body 2 is inserted from below the insulator base 1 having the lower surface opening, the surface area of the fixed contact terminal 19 installed on the upper surface of the insulator base 1 can be made sufficiently large. .

[0012]

As described above, in the electromagnetic relay of the present invention, the lower surface of the insulator base is used as an opening and the upper surface is provided with three holes, and the coil block body is inserted into the hole from below. By projecting the end faces of the U-shaped iron core and the permanent magnet, the connecting portion of the coil terminal and the coil lead-out terminal, the movable contact and the fixed contact, and the coil body and the movable contact and the fixed contact are separated by the insulator base. There is an effect that the withstand voltage between the coil and the contact can be dramatically increased. Further, the present invention has an effect that the surface area of the fixed contact terminal can be significantly increased, the heat dissipation characteristic of the heat generated by the opening and closing of the contact portion can be improved, and a larger current can be opened and closed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electromagnetic relay according to an embodiment of the present invention with a movable contact spring block and a permanent magnet removed.

2A and 2B are top and back perspective views of the insulator base shown in FIG.

FIG. 3 is a perspective view showing a state where a coil block body is combined with the insulator base shown in FIG.

FIG. 4 is an exploded perspective view of an electromagnetic relay showing a conventional example.

[Explanation of symbols]

 1 Insulator base 2 Coil block body 3 Base case 4 Moving contact spring block 5 Permanent magnet 6 Spool 7 Iron core 8 Coil 9 Coil terminal 10 Hole portion 11 Armature 12 Insulation fixed body 13 Moving contact spring 14 Hinge spring 15 Moving contact 16 Insulation Block 17 Coil Derivation Terminal 18 Fixed Contact 19 Fixed Contact Terminal 20 Neutral Terminal 21 Iron Core Hole 22 Magnet Hole

Claims (3)

[Claims] 1. A coil block body in which a coil is wound around a coil spool in which a U-shaped iron core and a coil terminal are integrally molded with an insulator, a permanent magnet arranged in a central hole of the coil spool, and both pole portions are An armature arranged so as to oppose both end faces of the iron core, and a movable contact spring and a hinge having a movable contact at a tip end thereof in conjunction with a tilting motion in which both end portions of the armature come into contact with and separate from both end faces of the iron core. A movable contact spring block in which a spring is integrally molded with an insulating fixed body, a fixed terminal provided with a fixed contact opposed to the movable contact, a neutral terminal connected to one end of the hinge spring portion, and a coil connected to the coil terminal. A substantially box-shaped insulator base having a bottom opening integrally formed with an insulator so as to implant the lead-out terminal, and formed with the insulator and combined with the insulator base. Including a base case with an open top surface,
An electromagnetic relay, wherein the coil block body is covered from above and below with the insulator base and the base case. 2. The electromagnetic relay according to claim 1, wherein the insulator base is formed with both end surfaces of the U-shaped iron core and holes through which the permanent magnets project. 3. The electromagnetic relay according to claim 1, wherein the upper surface of the insulator base is installed so that a part of the fixed contact terminal is exposed with a predetermined surface area.