JPS6334223Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a terminal plate mounting structure.

Conventionally, the arrangement of each contact in a relay contact structure in a relay and the terminal 12 by a relay socket etc.
Because of this arrangement, a part of the terminal board 18 that has the fixed contacts 16 and terminals 12 inside the relay has no choice but to have a structure in which the fixed contacts 16 and terminals 12 are separated, as shown in FIG. Ta. By the way, terminal board 1
8, the terminal plate 18 is inserted into the insertion hole 24 drilled in the base 8.
Insert the terminal 12 at the tip of the terminal part 31 to connect the terminal 1.
2 was fixed by caulking or gluing. However, since the contact portion 13 was assembled without being fixed in any way, the positioning accuracy of the fixed contact 16 was difficult to achieve, and as a result, there was a possibility that a contact failure would occur.

The present invention has been proposed in view of the above-mentioned points, and in a terminal board that has a fixed contact and a terminal of an electrical device such as a relay, and in which the fixed contact and the terminal are separated, the contact part and the terminal part are separated from each other. The purpose of this is to improve the accuracy of the fixed contact position.

The present invention will be described in detail below based on an embodiment of the illustrated relay. In the figure, reference numeral 8 denotes a base which is a synthetic resin molded product, and walls 21 are erected on the four circumferences of the upper surface.A cover 9, which is also a synthetic resin molded product and has an open bottom, is placed over this wall 21 to cover the outer surface of the wall 21. Both are assembled by engaging the provided protrusion 22 with the engagement hole 23 provided in the lower part of the cover 9. base 8
A pair of parallel insulating walls 26 and 27 are erected on the upper surface, and a yoke 1 is placed between the two insulating walls 26 and 27.
A coil block is arranged on one side of the insulating wall 26, and a contact block is arranged on one side of the insulating wall 27.
The coil block is composed of a coil frame 5 around which a coil 4 is wound around the outer periphery of a central body 28, an iron core 3 disposed in a through hole 30 at the center of the coil frame 5, and coil terminals 20 at both ends of the coil frame 5. The terminal holding parts 29, 29 into which are inserted are integrally molded. The iron core 3 is integrated with the L-shaped yoke 1, and the iron core 3 and the yoke 1 are formed into a U-shape. Both have rectangular cross-sectional shapes and the same size. Both the end faces of the iron core 3 and the end faces of the yoke 1 are cut at right angles, so that both end faces are flush with each other. Therefore, the iron core 3 and the yoke 1 are compatible, and when assembled into the coil frame 5, one of the pieces may be used as the iron core 3 and the other piece may be used as the yoke 1. In the figure, 2 is an armature, which consists of one piece 2a that is attracted to the magnetic pole surface of the end face of the iron core 3, and one piece 2b that presses and drives a contact spring 6, which will be described later.
A concave surface 11 is formed at the center of the outer surface of the bent portion, and a piece 2a of the inner surface of the bent portion is formed.
A recess 10 is formed in the closer portion. The armature 2 has one edge of the recess 10 supported by the edge of the yoke 1 so that it can swing freely, and a presser spring that contacts the concave surface 11 and urges the armature 2 toward the yoke 1. 7
is held by. The presser spring 7 is formed integrally with the other end of the contact spring 6, which has a pair of movable contacts 15, 15 at one end, and is attached to the common terminal 17. The contact point in the concave surface 11 between the presser spring 7 and the armature 2 is located at the yoke 1
The support point of the armature 2 is located on the side of the piece 2b that drives the contact spring 6, and therefore the presser spring 7 does not simply bias the armature 2 toward the yoke 1 and hold the armature 2. It also functions as a return spring for the armature 2. Contact spring 6 and presser spring 7
Common terminal 17 with attached fixed contact 1
Both the terminal plate 18, which is a normally closed terminal, and the normally open terminal 19, to which terminals 6 and 16 are attached, are attached to the base 8 by inserting the terminals into insertion holes 24 provided in the base 8. The coil frame 5 is also attached to the base 8 by inserting the coil terminals 20 into the insertion holes 25 provided at the corners of the base 8.

The terminal plate 18, which is a normally closed terminal, has a contact part 13 having a fixed contact 16 at one end, and a terminal part 31 having a terminal 12 in the opposite direction to the contact part 13 at the other end. Made of metal, fixed contact 1
6 and the terminal 12 are plated with gold or the like.
14 is a protrusion, and this protrusion 14 is connected to the terminal plate 18.
A hemispherical protrusion is provided on the side of the lower end of one side of the contact portion 13 of the contact portion 13 . The base 8 has a vertically long insertion hole 24 having the same shape as the terminal for inserting and fixing the terminal 12 of the terminal section 31 of the terminal board 18, and the contact section 13 of the terminal board 18 is press-fitted into the upper surface of the base 8. A receiving stand 33 having a receiving groove 32 for fixing is provided. This pedestal 33 has a substantially U-shaped cross section, and a receiving groove 32 is formed between the insulating wall 27 and the insulating wall 27 to press-fit and fix the contact portion 13 inside one end. The gap between this receiving groove 32 is exactly the same as that of the protrusion 14.
It is slightly narrower than the thickness of the contact portion 13 including the contact portion 13. In addition, the fixed contact 16 of the terminal board 18 and the terminal 1
2 are separated from each other, the positions of the insertion hole 24 into which the terminal 12 is inserted and the holder 33 into which the contact portion 13 is press-fitted are as shown in FIG. This is the position where the contact portion 13 will be placed when inserted into.

Thus, the terminals 12 of the terminal board 18 are inserted into the insertion holes 24 made in the base 8, and the terminal board 1
The protrusion 14 of the contact portion 13 of No. 8 is press-fitted and fixed into the receiving groove 32 of the receiving base 33.

At this time, the other side surface of the contact portion 13 comes into contact with one inner wall surface of the receiving groove 32, and the protrusion 14 comes into pressure contact with the other inner wall surface of the receiving groove 32, so that the contact portion 13 is securely inserted into the receiving groove 32. It will be fixed at Therefore, the contact portion 13 is inserted into the insertion hole 24 of the other terminal 12.
Since the position of the fixed contact 16 is fixed at the same time as the insertion and fixation of the fixed contact 16, the position of the fixed contact 16 does not vary, and the precision of the fixed position of the fixed contact 16 can be improved.

Before press-fitting the contact part 13 into the receiving groove 32, press the contact part 13 slightly outward and bend it as shown in FIG. 7. When the contact part 13 is press-fit into the receiving groove 32, the contact part 13 will The protrusion 14 comes into close contact with the other side surface of the receiving groove 32 that it presses, that is, along the insulating wall 27, and the contact part 13 is fixed vertically, so that the relay contact is fixed with good accuracy.

As described above, the present invention provides a terminal board mounting structure for attaching a terminal board to a base, which has a fixed contact and a terminal of an electrical device such as a relay, and in which the contact part having the fixed contact and the terminal part having the terminal are separated. On the upper surface of the base made of a molded product, a holder with a substantially U-shaped cross section is formed with a receiving groove on the inside for press-fitting and fixing the contact part of the terminal board, and an insertion hole for inserting the terminal of the terminal part of the terminal board is formed on the base. A hole is drilled in the terminal board, a protrusion is provided on one side of the contact part of the terminal board, and the other side of the contact part of the terminal board comes into contact with the inner wall surface of one of the receiving grooves of the cradle, and the protrusion protrudes from the other side of the receiving groove. Since it is press-contacted to the inner wall surface and the terminal part is inserted and fixed into the insertion hole, unlike conventional methods in which the terminal board is fixed in only one place, the terminal part of the terminal board can be inserted through the base. It is inserted and fixed into the hole, and the protrusion of the contact part is press-fitted into the receiving groove of the pedestal formed on the top surface of the base.
Since both the terminal part and the contact part are fixed to the base, the terminal board can be fixed to the base reliably and accurately, and the contact part is press-fitted into the receiving groove of the holder. In this case, the other side of the contact part comes into contact with one inner wall surface of the receiving groove, and the protrusion presses against the other inner wall surface of the receiving groove to fix the contact part. Almost the entire terminal board can be press-fitted into the receiving groove, which has the advantage that the center position of the contact part does not vary, improving the fixing accuracy of the fixed contact positioning where the contact part is provided. This has the effect that contact failures are less likely to occur.

[Brief explanation of the drawing]

Fig. 1 is an enlarged perspective view of a conventional relay with a terminal plate fixed to its base, Fig. 2 is an exploded perspective view of a relay equipped with an embodiment of the present invention, and Fig. 3 is an exploded perspective view of the same relay after assembly. 4 is a perspective view of the same relay as above; FIG. 5 is an enlarged perspective view of the terminal board fixed to the base of the above; FIG. 6 is a perspective view of the base terminal board fixed; The figure is a side view of the contact part of the terminal board press-fitted into the receiving groove of the cradle, and FIG. , 12 is a terminal, 13 is a contact part, 14
16 is a projection, 16 is a fixed contact, 18 is a terminal plate, 24 is an insertion hole, 31 is a terminal portion, 32 is a receiving groove, and 33 is a holder.

Claims (1)

[Scope of utility model registration request] In a terminal board mounting structure for attaching a terminal board to a base, which has a fixed contact and a terminal of an electrical device such as a relay, and in which the contact part with the fixed contact and the terminal part with the terminal are separated, the upper surface of the base made of a molded product is A holder with a substantially U-shaped cross section is formed with a receiving groove on the inside for press-fitting and fixing the contact part of the terminal board, and an insertion hole for inserting the terminal of the terminal part of the terminal board is bored in the base. A protrusion is provided on one side of the contact part, and the other side of the contact part of the terminal board comes into contact with one inner wall surface of the receiving groove of the cradle, and the protrusion comes into pressure contact with the other inner wall surface of the receiving groove. Terminal board mounting structure consisting of inserting and fixing the part into the insertion hole.