JPH0717127Y2 - Coupling structure of electromagnet block and terminal block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an electromagnetic relay, and more particularly to a coupling structure of an electromagnet block and a terminal block.

[Prior Art] Conventionally, the coil relay terminal of the electromagnet block and the coil terminal of the terminal block are welded and joined to mechanically connect the electromagnet block and the terminal block and electrically connect the coil and the coil terminal at the same time. Such a binding structure is known.

This conventional coupling structure will be described with reference to FIGS. 6 and 7.

The electromagnet block is constructed by winding a coil around an iron core via a spool, and normally, a collar terminal of the spool is provided with a relay terminal for relaying the connection between the coil and the coil terminal.

As shown in FIG. 6, the general structure of the conventional electromagnet block 3 is such that a relay terminal 33 of a coil 32 is embedded in a collar portion 31 of a spool, and the relay terminal 33 is wound around the wire rod end of the coil 32. A coil connecting portion 331 for connecting and a welding portion 332 for welding and fixing the relay terminal 33 to the coil terminal 41, which will be described later with reference to FIG. 7, are integrally configured, and the coil connecting portion 331 and the welding portion 332. It is embedded and fixed in the collar portion 31 at the connecting portion of.

Further, the conventional terminal block 4 has a frame body as shown in FIG.
A coil terminal 42 is embedded in 41, and the coil terminal 42 is integrally formed with a lead-out portion 421 to an external circuit and a welding portion 422 for fixing the coil terminal 42 to the relay terminal 33 of the electromagnet block 3 by welding. The lead-out portion 421 and the welded portion 422
It is embedded and fixed in the frame body 41 at the connecting portion with.

When the electromagnet block 3 is incorporated into the terminal block 4 having the above structure, as shown in FIG. 7, a small gap is formed between the welded portion 332 of the relay terminal 33 of the electromagnet block 3 and the welded portion 422 of the coil terminal 42 of the terminal block 4. Oppose each other. In this state, the welded portion 332 of the relay terminal 33 is forcibly bent and brought into contact with the welded portion 422 of the coil terminal 42 and both are fixed by welding, whereby the relay terminal 33 and the coil terminal 42 are electrically connected and an electromagnet is formed. The electromagnet block 3 and the terminal block 4 are coupled to each other by the pressing force obtained by the return elastic force of the welded portion 332 on the block 3 side.

[Problems to be Solved by the Invention] According to the above-mentioned conventional technique, since the protruding length of the welded portion 332 of the relay terminal 33 from the collar portion 31 is short, an appropriate pressing force cannot be obtained when they are fixed by welding. Since a comparatively large force is constantly applied to the welded part of the collar portion 31, a crack is likely to occur at the welded part.

To solve this problem, for example, if the protruding length of the welded portion 332 is increased, the dimension in the longitudinal direction of the electromagnetic relay increases, or a new problem such as the need to shorten the coil winding portion of the electromagnet block 3 arises. Yes, and doing so is not a fundamental solution.

The present invention proposes to solve the above problems, and provides a coupling structure of an electromagnet block and a terminal block, which can obtain a proper coupling pressing force when the electromagnet block and the terminal block are coupled and maintain a stable coupling. The challenge is to obtain it.

[Means for Solving the Problems] In order to solve the above problems, the present invention forms a relatively long connecting portion between a coil connecting portion and a welding portion of a relay terminal,
The embedding of the relay terminal in the electromagnet block collar portion is performed at the boundary portion between the coil welded portion and the welded portion, and the connecting portion is installed along the wall portion of the collar portion from the portion embedded in the collar portion, and The welded part is bent at the boundary with the connecting part,
The flange is formed so as to project in the direction opposite to the surface along the connecting portion.

[Operation] With the above configuration, the dimension of the relay terminal from the portion embedded in the collar portion to the welded portion can be set long, so that the electromagnet block and the terminal block can be coupled with an appropriate fastening force, and a stable coupling structure can be obtained. Can be realized.

In addition, since the welded portion of the relay terminal is rich in bending flexibility near the joint portion due to the existence of the long connecting portion, an unreasonable force is not applied to the flange portion in which the relay terminal is embedded, and the flange portion is not affected. No cracks will occur.

Further, since the connecting portion provided to lengthen the dimension from the embedded portion of the relay terminal to the collar portion to the welded portion is along the wall surface of the collar portion, the space occupied by the relay terminal does not expand, The relay terminal does not hinder the downsizing of the electromagnetic relay.

[Embodiment] FIGS. 1 to 5 are drawings for explaining an embodiment of the present invention. FIG. 1 is a perspective view of a terminal block, FIG. 2 is a perspective view of an electromagnet block, and FIG. 3 is a terminal block. 4 is a perspective view showing a main part of the coil terminal (a coil terminal is shown by a solid line, and a peripheral portion of the coil terminal is shown by a dashed line). FIG. Periphery-related portions of the terminal are indicated by alternate long and short dash lines), and FIG. 5 is a partial cross-sectional view showing a main part when the electromagnet block and the terminal block are connected.

As shown in FIG. 1, the terminal block 1 is constructed by embedding a coil terminal 11, a fixed terminal 12, and a common terminal 13 each made of a conductive material in a substantially rectangular frame body 14 made of an insulating synthetic resin. .

The coil terminal 11 is a terminal for leading the coil 23 of the electromagnet block 2 to an external circuit, which will be described later with reference to FIG. 2, and is provided at each of the four corners of the frame body 14 at a total of four.
The fixed terminal 13 is a terminal for leading a movable contact spring, which is provided with an armature to an armature block (not shown), to an external circuit, and is provided at the center of each of the two opposite long sides of the frame body 14.
A total of two of them are provided, and the fixed terminal 12 is integrally formed with the welded portion of the fixed contact 15 and is a terminal for leading the fixed contact 15 to an external circuit, which is common to the coil terminal 11. A total of four terminals are provided between the terminal 13 and each terminal. Of the above-mentioned terminals, the coil terminal 11 is related to the present invention.

As shown in FIG. 2, the electromagnet block 2 includes an iron core 21 made of magnetic pole material, and a collar portion 22 near both magnetic pole portions 211 and 212 of the iron core 21.
1, 222, and a spool 22 made of an insulating synthetic resin covering the iron core 21 with a magnet mounting portion 223 formed in the center.
And a coil 23 wound around the iron core 21 via the spool 22.
And the magnet 24 attached to the magnet attaching portion 223 of the spool 22, and both sides of the collar portions 221, 222 of the spool 22 (the magnetic pole portion 2
It is composed of four relay terminals 25 made of an elastic conductive material that are embedded and fixed to both sides of the iron core 21 in the direction orthogonal to the central axis of the longitudinal direction with 11,212 interposed therebetween. The spool 22 (in particular, the collar portions 221, 222) and the relay terminal 25 are related to the present invention. The relay terminal 25 is a terminal that relays the connection of the coil 23 to the coil terminal 11 of the terminal block 1. When the coil 23 has a single winding structure, it may be two relay terminals electrically, but the terminal In order to mechanically connect the block 1 and the electromagnet block 2, four coils 23 are required regardless of the number of windings.

Main parts of the terminal block 1 will be described with reference to FIG.

In the coil terminal 11, a lead-out portion 111 to the external circuit and a welded portion 112 of the relay terminal 25 of the electromagnet block 2 are integrally formed, and the lead-out portion 111 and the welded portion 112 are connected to each other at the boundary. It is configured to be bent at a right angle in the vicinity of the connecting portion 113, and the periphery of the welding portion 112, that is, the tip portion 112a of the welding portion 112 and the connecting portion 113 are embedded and fixed in the frame body 14.

Further, the frame body 14 is a space in which the upper surface portion and the lower surface portion of the welded portion 112 are cut out, and this space is a space for inserting a welding electrode (hereinafter referred to as a welding space) 14 during welding work.
1, 142 are formed, and the upper and lower surfaces of the welded portion 112 are exposed in the welded spaces 142, 141. The lower welding space 1
41 is a welded portion 252 of the relay terminal 25, which will be described later with reference to FIG.
It is also the space where is inserted.

Next, a main part of the electromagnet block 2 will be described with reference to FIG.

The relay terminal 25 has a coil connecting portion 251 for winding and connecting the wire end of the coil 23, a welding portion 252 with the coil terminal 11 of the terminal block 1, and a connecting portion 253 for connecting the coil connecting portion 251 and the welding portion 252. Are integrally formed, and the coil connecting portion 251 and the welding portion 252 are in the same direction at the boundary portion between the coil connecting portion 251 and the connecting portion 253 and the boundary portion between the welding portion 252 and the connecting portion 253,
Moreover, it is configured to be bent at a right angle.

The burying of the relay terminal 25 in the collar portion 221 or 222 is made at the boundary portion 254 between the coil connecting portion 251 and the connecting portion 253, and the connecting portion 253 faces the bridging portions 221 and 222 from the embedded portion. It is installed alongside the inner wall surfaces 221a and 222a,
The welded portion 252 is bent toward the outer wall surfaces 221b, 222b of the collar portions 221, 222 at the boundary with the connecting portion 253, and the outer wall surface 2
It is formed to project outward from 21b and 222b. Also,
The dimension in the height direction of the connecting portion 253 in the drawing is set to be as long as possible.

The terminal block 1 and the electromagnet block 2 configured as described above are assembled together as follows.

That is, the terminal block 1 has a frame body as shown in FIG.
Magnetic pole parts 211, 21 of the electromagnet block 2 on both sides of the short side of 14
Insertion holes 143 and 144 for inserting 2 are provided, and the electromagnet block 2 is assembled by inserting the magnetic pole portions 211 and 212 into the insertion holes 143 and 144 from the tip ends of the terminals 11, 12 and 13 of the terminal block 1.

The mutual positional relationship of the main parts when both blocks 1 and 2 are assembled in this way is as shown in FIG. That is, the fourth
As shown in the figure, the collar portions 221 and 222 have reference portions 221c and 222c that define the vertical positional relationship with the terminal block 2 when assembled.
In the state in which both blocks 1 and 2 are assembled, the reference portions 221c and 222c contact the base surface 145 formed inside the frame body 14 of the terminal block 1 as shown in FIG. The positions where the two blocks are assembled are determined by contacting each other, and at this time, the welded portion 112 of the coil terminal 11 of the terminal block 1 and the welded portion 252 of the electromagnet block 2 face each other with a slight gap α therebetween.

Next, the welding electrodes of the welding machine are inserted into the welding spaces 141 and 142 formed in the frame body 14 from the directions of arrows A and B until they come into contact with the respective weld portions 252 and 112. When the welding electrode inserted from the direction of arrow A contacts the welding portion 252 of the relay terminal 25 and is further pushed upward in the drawing, the welding portion 252 bends as shown by the dotted line against its elastic force, External terminal 11 weld
Contact 112. When the two welded portions 112 and 252 are fixed by welding here, the coil 23 and the coil terminal 11 are electrically connected via the relay terminal 25, the terminal block 1 and the electromagnet block 2 are mechanically coupled, and Due to the elastic restoring force (barring force) of the welded portion 252 of the relay terminal 25, the coupling between the two blocks 1 and 2 is appropriately maintained by the fastening force.

In the connection structure described above, the welded portion 25 of the relay terminal 25 is
2, the welding electrode is inserted from the inner side surface in the bending direction (that is, the welding surface is welded to the welding part 25).
It is set on the outer side surface in the bending direction from the second connecting portion 253. ), Along with the bending of the welded portion 252, the connecting portion 253 also slightly bends in the direction away from the inner wall surfaces 221a, 222a of the collar portions 221, 222 as shown by the dotted line. As described above, in the present embodiment, the elastically deformed portion of the relay terminal 25 at the time of welding connection is from the welding portion 252 to the connecting portion 2.
The length is set up to 53.

[Effects of the Invention] As described above, the present invention provides a long connecting portion from the portion embedded in the collar portion of the relay terminal to the welded portion, and the connecting portion is provided along the wall surface of the collar portion. When connecting the terminal block and the electromagnet block, the elastic deformation of the relay terminal occurs in the long section from the welding part to the connecting part. It is possible to provide an electrode relay in which the coupling force between the two blocks is maintained with an optimal fastening force, the coupling dimension accuracy is good, and the coupling dimension is less likely to change over time.

Further, since no excessive force is applied to the relay terminal burying portion of the collar portion of the spool, a crack or the like does not occur at the portion and a high quality electromagnetic relay can be obtained.

Further, since the connecting portion of the relay terminal, which is a unique structure of the present invention, is provided along the wall surface of the spool collar portion, the connecting portion does not increase the size of the electromagnet block, which hinders the miniaturization of the electromagnetic relay. It will not be done.

As described above, the present invention has many advantages and its effect is extremely large.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 5 are drawings for explaining an embodiment of the present invention. FIG. 1 is a perspective view of a terminal block, FIG. 2 is a perspective view of an electromagnet block, and FIG. Is a perspective view of the main part of the terminal block,
FIG. 4 is a perspective view of a main part of the electromagnet block, and FIG. 5 is a cross-sectional view of the main part showing a connected state of the terminal block and the electromagnet block. 6 and 7 are drawings for explaining a conventional example,
FIG. 6 is a perspective view of the electromagnet block, and FIG. 7 is a cross-sectional view of essential parts showing a connected state of the terminal block and the electromagnet block. (Main symbols) 1 …… Terminal block, 11 …… Coil terminal 111 …… Leading part, 112 …… Welding part 2 …… Electromagnetic block, 22 …… Spool 221,222 …… Brim part 23 …… Coil, 25 …… Relay terminal 251 …… Coil connection part 252 …… Welding part, 253 …… Coupling part

Claims (3)

[Scope of utility model registration request] 1. An electromagnetic relay having a relay terminal in a spool collar portion of an electromagnet block, wherein a coil of the electromagnet block and a coil terminal of the terminal block are connected via the relay terminal. The terminal is formed of an elastic conductive material, a coil connecting portion that connects the coil ends, and a welding portion to the coil terminal,
A connecting portion that connects the coil connecting portion and the welding portion is integrally formed, and is embedded in the collar portion at a boundary portion between the coil connecting portion and the connecting portion, and the connecting portion is connected to the collar portion. Along the wall surface of the collar portion from the buried portion of, the welded portion is bent at the boundary portion with the connecting portion, and is formed to project in the direction opposite to the connecting portion alongside surface of the collar portion, and the coil terminal is Formed of a conductive material, the lead-out portion to the outside and the welded portion to the relay terminal are integrally formed, and the welded surface of the welded portion is exposed and embedded in the terminal block in the periphery thereof. In the state where the electromagnet block and the terminal block are combined, the relative dimension is set so that the welded portion of the electromagnet block and the welded portion of the terminal block face each other with a small gap therebetween. The weld Coupling structure of the electromagnet block and the terminal block by combining the electromagnetic block and the terminal block by the against the elastic force to force contact with the welding portions of the terminal block is welded fixing welds both mutually. 2. The connecting structure of the electromagnet block and the terminal block according to claim 1, wherein the relay terminals are provided on both sides of the flange portions sandwiching the central axis of the iron core of the electromagnet block, and the connecting portion of the relay terminals. A coupling structure of an electromagnet block and a terminal block, which are arranged along inner wall surfaces of both flange portions facing each other. 3. The combined structure of the electromagnet block and the terminal block according to claim 1 or 2, wherein the outer side surface in the bending direction from the connecting portion of the welding portion of the relay terminal is the welding surface to the coil terminal. And terminal block connection structure.