JPS6298522A - Relay base - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is mainly used as a base for a small electromagnetic relay, and is made of a synthetic resin in which a common terminal with a movable contact spring and a fixed contact terminal are insert-molded. This relates to a manufactured glue base.

<Conventional technology> Conventional small electromagnetic relays have a pair of fixed contact terminals.

A process was used in which the relay base was integrally molded with the common terminal and the movable contact spring was welded onto the common terminal to complete the relay terminal part. This is to prevent damage to the movable contact spring during plastic molding of the relay base, but welding the movable contact spring after the plastic molding process has the disadvantage of poor workability and reduced productivity.

Therefore, the present inventor devised a relay base that could be insert-molded without damaging the movable contact spring while welding the movable contact spring to the common terminal in advance.
It has already been filed as No.-34951. An outline of this invention will be explained with reference to FIGS. 7 and 8. As shown in FIG. 7, the outer fixed contact terminals 2A and 2B are embedded portions. A and 7B are provided in positions vertically aligned with the inner fixed contact terminals 3A and 3B, and are passed through the horizontal deflection parts 6A and 6B and the bent parts at both ends of the contact mounting parts. It is connected to A and 7B. Further, as shown in FIG. 7, the common terminals 4A, 4B have embedded portions 8A, 8B connected to the movable contact springs 9A, 9B.
The movable contact spring mounting portion 11A is provided at a position biased inward from the fixed end of the movable contact spring via the vertical deflection portion 10A, the IOB and the bent portions at both ends thereof.

It is connected to 11B. The inner surfaces of the embedded portions 5A and 5B of the outer fixed contact terminals 2A and 2B, the inner surfaces of the inner fixed contact terminals 3A and 3B, and the common terminal 4A,
Mold mating surfaces a and b that divide the molding die are formed on the inner surfaces of the embedded portions 8A and 8B of 4B.

With the above configuration, each fixed contact terminal 3A.

5A, 3B, 5B and common terminals 4A, 4B are in the state of a terminal hoop that is integrally provided on a band-shaped metal piece,
After fixing the movable contact springs 9A, 9B to the common terminals 4A, 4B in advance by sport welding, the relay is assembled using a mold as shown in Fig. 8 without damaging the movable contact springs 9A, 9B. The base 1 can be molded from plastic. That is, in FIG. 8, mold A defines the inner surface of relay base 1 as described above, mold B facing it defines the bottom surface of relay base 1, and molds C and D define the inner surface of relay base 1. It defines both sides and both front and rear sides. The mating surfaces of the molds C and D and the mold A are the mold mating surfaces a and b described above. Furthermore, the mating surfaces of the molds C and D and the mold B are formed on the inner surface of the external terminal rows 12 and 13. Notches 14 formed above mold mating surfaces a and b of molds C and D
, 15, the movable contact springs 9A, 9B are located within the common terminals 4A, 4B by bending, so there is no risk that these movable contact springs 9A, 9B will be damaged during the plastic molding process.

<Problems to be Solved by the Invention> The relay terminal part of the above-mentioned small electromagnetic relay, the movable contact spring 9A in a difficult situation after plastic molding.

Although the welding step 9B can be omitted and has the remarkable effect of improving productivity, there are some problems.

That is, in order to form mold mating surfaces a and b, the inner fixed contact terminals 3A and 3B and the embedded portions 5A and 5B of the outer fixed contact terminals 2A and 2B are positioned and aligned on the same plane. This makes the plastic molding process difficult.

In addition, the inner fixed contact terminals 3A, 3B and the outer fixed contact terminal 2A are attached to the terminal hoop formed by the punching process.
, 2B are provided, so as to be clear from FIG. 7, the outer fixed contact terminal 2A.

2B contact mounting parts 7A, 7B and inner fixed contact terminal 3A
, 3B cannot be provided on the same projection plane, and the contacts must be provided at two locations shifted in the longitudinal direction of the movable contact springs 9A and 9B.
Requires positioning of contacts at certain points.

The present invention has been made in view of the above-mentioned conventional problems, and has a structure in which both the inner and outer fixed contact terminals forming a pair can be molded from synthetic resin without having to align them with a movable contact spring interposed therebetween. The purpose of this is to provide a reference base.

Means for Solving Problems> In order to achieve the above object, the present invention provides a fixed contact terminal on one side of each pair of two pairs of fixed contact terminals,
A pair of common terminals to which movable contact springs are respectively fixed are integrally provided by insert molding, and a mounting hole is formed at the mounting location of the fixed contact terminal on the other side of each pair. This is a summary.

<Operation> With the above configuration, it is not necessary to align both the inner and outer fixed contact terminals of the pair by simply forming the mounting holes at appropriate locations during molding. When configuring a small electromagnetic relay using this relay base, it is necessary to press-fit either the inner or outer fixed contact terminal of each pair into the mounting hole, or install the fixed contact terminal. In the case of a small electromagnetic relay without a type, it is possible to deal with this by simply blocking the mounting hole with synthetic resin.

<Example> Hereinafter, a detailed explanation will be given based on one embodiment of the present invention.

In FIG. 1, the same or equivalent parts as in FIGS. 7 and 8 are given the same reference numerals to clarify the differences. The glue head 16 of the present invention, which is molded from a synthetic resin, is a flat rectangular parallelepiped as a whole similar to the existing one, and has one inner fixed contact terminal 3A and one inner fixed contact terminal 3A on both sides of both ends in the longitudinal direction. The other outer fixed contact terminal 2B.

Common terminals 4A, 4B and coil terminals 17A, 17B are embedded and supported by insert molding, and mounting holes 18A are provided at appropriate positions on the center side of each of the fixed contact terminals 3A, 2B.
, 18B are formed, and each mounting hole 18
Slanted surfaces 19A and 19B that are inclined outward from A and 18B are formed toward the center, respectively. As shown by the dashed-dotted line arrows in the figure, fixed contact terminals 2OA and 20B having the same shape are press-fitted and fixed into the respective mounting holes 18A and 18B, respectively. The fixed contact terminals 2OA, 20B have substantially T-shaped mounting portions 21A, 21B press-fitted into the mounting holes 18A, 18B at positions below the movable contact springs 9A, 9B, as shown in FIGS. 2 and 3. , this mounting part 21A,
Contact mounting portions 23A and 23B are extended from 21B through deflecting portions 22A and 22B in the orthogonal direction and right angle bent portions at both ends thereof to positions facing the corresponding fixed contact terminals 3A and 2B, respectively. Contact points 21A, 3A, 20B.

2B and each contact 2 of both rotating contact springs 9A and 9B
3A', 9A', 3A', 23B', 9B'.

2B' are located on the same projection plane.

The small electromagnetic relay to which the relay base 16 of this embodiment is applied has a case 24 fitted to the relay base 16, as shown in FIGS. Yoke 25, 25° armature 26. Permanent magnet27. Coil 28° hobbin 29. Return spring 30. Card 31. Known relay components such as the barrier 32 are accommodated therein.

Next, the functions and effects of the embodiment relay base 16 having the above structure will be explained with reference to FIGS. 4 to 6 showing the manufacturing process thereof.

First, as shown in FIG. 4, the terminal hoop 33 has a shape in which a single fixed contact terminal 3A (2B), a common terminal 4A (4B), etc. are integrally formed on a band-shaped metal piece 34. Fix the movable contact spring 9A (9B) to the common terminal 4A (4B) and the contact 3A'(2B') to the fixed contact terminal 3A (2B) by spot welding or the like. Since 2B) is single, spot welding can be easily performed.

When the relay base 16 is molded, the mounting holes 18A and 18B are formed below the movable contact springs 9A and 9B as shown in FIG. Press 9A and 9B in the direction of the arrow to bend them as shown by the one-dot chain line. These movable contact springs 9A, 9B
Inclined surfaces 19A and 19B are formed by the pressing part of the mold that presses the . At this time, since there are only one fixed contact terminal 3A and one fixed contact terminal 2B on each side, two
This eliminates the need to align individual fixed contact terminals, making the molding process simpler than before.

In addition, after molding the relay base 16, the fixed contact terminal 2OA
, 20B into the mounting holes 18A, 18B, as shown in FIG. Hole 18A.

Shift it from the upper position of 18B. Thereby, it is possible to easily perform the work of correcting the mounting holes 18A, 18B of the fixed contact terminals 2OA, 20B.

On the other hand, for a type of electromagnetic relay that has only one fixed contact terminal 3A, 2B on each side, the mounting holes 18A, 18B are opened after being assembled as an electromagnetic relay, as shown in Figures 2 and 3. This can be handled by injecting epoxy resin or the like from the back side of the relay base 16 to cover it.

<Effects of the Invention> As is clear from the above description, according to the relay base of the present invention, only one of a pair of fixed contact terminals is integrally provided by insert molding, and each of the other fixed contact terminals is integrally provided by insert molding. Since the structure forms a mounting hole for press-fitting the fixed contact terminals, there is no need to align multiple fixed contact terminals when molding this relay base, and the molding process for insert molding the fixed contact terminals is extremely simplified. It has the advantage of being easy to carry out.

Also, when constructing a small electromagnetic relay using this relay base, for electromagnetic relays that have fixed contact terminals on both sides of each movable contact spring, attach the other fixed contact terminal that is not insert molded. It is only necessary to fix the terminal to the hole, and in this case, the fixed contact terminal to be fixed to the terminal is formed separately from the terminal hoop, so the pair of fixed contact terminals can be placed opposite to each other on both sides of the contact of the movable contact spring. Easy positioning and improved contact accuracy.

On the other hand, for small electromagnetic relays that have only one fixed contact terminal for each movable contact blade on both sides, after assembling the electromagnetic relay, each mounting hole is closed by injecting synthetic resin from the back side. This can be dealt with.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the relay base of the present invention, FIGS. 2 and 3 are a front view and a partially cutaway plan view, respectively, of a small electromagnetic relay using the relay base of FIG. 1, and FIG.
Figures 6 to 6 show the manufacturing process, Figure 4 is a front view of the terminal hub with the movable contact spring welded prior to molding the relay base, and Figure 5 explains the state of the relay base during molding of the present invention. 6 is a plan view for explaining the state in which a fixed contact terminal is fixed to the relay base of the present invention, FIG. 7 is a plan view of a conventional relay base, and FIG. FIG. 2 is a front view of the relay-based molding die shown in FIG. 2 B, 3 A--one fixed contact terminal 4A,
4B... - Common terminal 9A, 9B - Movable contact spring 16 - Relay base 18A, 18B - Mounting hole

Claims (1)

[Claims] (1) A fixed contact terminal on one side of each pair of two pairs of fixed contact terminals and a pair of common terminals to which movable contact springs are respectively fixed are integrally provided by insert molding, and each pair of fixed contact terminals is integrally provided by insert molding. A synthetic resin relay base characterized by mounting holes formed at the mounting locations of fixed contact terminals on the other side.