JPH03163721A - Manufacture of electromagnetic relay - Google Patents

Abstract

PURPOSE:To efficiently perform assembly, inspection and adjustment while components are kept connected to a lead frame by inserting terminal members and connecting members integrally provided on the lead frame to mold a base, cutting off the above terminal members from the lead frame, assembling components on the base, then cutting off connecting members. CONSTITUTION:Fixed contact terminals 11 and 12, a common terminal 13, connecting members 81a and 81b perpendicular to the longitudinal direction, connecting members 82a, 82b, 82c, 82d and 82e in the longitudinal direction, and a nearly II-shaped connecting member 83 connecting fixed contact terminals 11 and 12 on both sides are integrally formed on a lead frame 80. Fixed contact terminals 11 and 12, the common terminal 13 and connecting members 81a and 81b are inserted to mold a base 10. After this molding, tip sections of connecting members 82b, 82c and 82d, fixed contact terminals 11 and 12, and the common terminal 13 are cut off from the lead frame 80. Internal constituting components are assembled on the base 10, and they are removed from the lead frame 80 after the inspection and adjustment works of operation characteristics are completed.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method of manufacturing a magnetic relay.

(Prior Art) Conventionally, electromagnetic relays have been manufactured by inserting a terminal member integrally provided in a lead frame, molding several bases simultaneously or successively, and before assembling parts such as electromagnetic blocks to these bases. After the terminal member is cut and separated into individual bases, it is transported to an assembly process. Alternatively, after insert molding the base, assemble the parts to the base while still connected to the lead frame, and perform electrical inspection. Before performing g-alignment, the terminal members are cut from the lead frame and separated into individual pieces.

(Problem to be solved by the invention) However, in the former manufacturing method, transport between processes must be carried out individually, which is troublesome, and when assembling parts to the base, it is difficult to In addition to being difficult, there were problems in that the processing speed was slow.

Furthermore, in the latter manufacturing method, there was a problem that the assembly process and the inspection process were not continuous, resulting in poor production efficiency.

The present invention has been made in view of these problems, and it is an object of the present invention to provide a method for manufacturing an electromagnetic relay that allows efficient assembly, inspection, and finalization while connected to a lead frame.

(Means for Solving the Problems) In order to achieve the above object, the present invention molds a base by inserting a terminal member and a connecting member that are integrally provided in a lead frame, and the terminal member is removed from the lead frame. After separating and assembling the parts to each base, the connecting member is cut.

(Function) Even if the terminal member is separated from the lead frame, the pace is connected to the lead frame by the connecting member, so it is easy to transport within a process or between processes, and the base will not be damaged during transport. There is no. Furthermore, each base can be easily positioned simply by positioning the lead frame, so the processing speed is fast and the assembly accuracy is high. Furthermore, even if each assembly block is connected via the connecting member and lead frame, the terminal member is separated from the lead frame, so various adjustments can be made by energizing the terminal member as appropriate while connected to the lead frame. Tests can be carried out.

(Example) An example according to the present invention will be described below with reference to FIGS. 1 to 21.

The electromagnetic relay according to the present invention generally includes a base 10, a movable contact piece block 20, a movable iron piece 30, and an electromagnetic block 4.
0, a base reinforcing member 5 0.6 0, and a case 70.

The base 10 has a substantially rectangular planar shape with a cutout at the center of the short side, and has a shape in which the fixed contact terminal 1
1.12 and common terminal 13 are insert-molded, and pillar parts 4.14 and 14.14 for positioning an electromagnetic block 40, which will be described later, are protruded from the four corners of the upper surface, and coil terminals are inserted into their bases. hole 1 5,
1 5, 1 6.16 are provided. Furthermore, the base 10 is provided with a protruding base 17 having a longitudinal groove 17a for positioning at a position adjacent to the coil terminal insertion hole 16.16, and the common terminal l3 is provided near the base l7. The welding receiving portion 13a protrudes. This weld receiving portion 13a. The upper end portion of 13a is bent outward and can be adjusted from the side. Further, the base 10 has a fitting recess l8 in the center of the upper surface, and this recess l8
8 has a gas vent hole 18a in the center of the bottom, and a pedestal Ill 8b with a substantially semicircular cross section near both side edges.
18b (the pedestal portion on the near side is not shown in FIG. 1) is provided protrudingly.

As shown in FIG. 5, this base 10 includes a lead frame 80 formed in a continuous frame shape made of a hoop material.
A plurality of pieces are shaped simultaneously or successively by the method described below.

First, the fixed contact terminals 11 and 12 are attached to the lead frame 80.
, common terminal ■3, connecting member 81a perpendicular to the longitudinal direction
．． 8 lb., longitudinal coupling member 82a. 8 2b, 8
2c, 8 2d, 8 2e and fixed contact terminals 11 on both sides
．． A substantially square-shaped connecting member 83 that connects 12 is integrally formed. Then, the base IO is molded with the fixed contact terminals 11 and 12, the common terminal l3, and the connecting members 81a and 8lb inserted therein. After this molding, the connecting members 82b, 82c, 82d are cut off,
The tips of the fixed contact terminals 11, I2 and the common terminal 13 are cut and separated from the lead frame 80, and are bent downward as shown in FIG.

In this state, the individual bases 10 are connected to the connecting members 8la, 8
lb and connected to the lead frame 80 via connecting members 82a and 82e. Since they are supported, they can be handled together and transported easily within each process or between processes. In addition, the positions of all bases 10 can be determined simply by positioning the lead frame 80, so
There is no need to position each base IO, which increases the processing speed of each process and improves assembly accuracy.

Next, by cutting off the connecting members 81 and 81 (FIG. 6), the fixed terminal 11 provided with the fixed contacts 11a and 12a is
．． Adjustment tongue pieces 1lb and 12b are formed at the tip of 12. The tongue pieces 1lb, 12b adjustably protrude from the side end surface of the base 10, and are narrow in width, making it easy to insert an adjustment jig.

The base 10 was assembled with internal components and tested for operating characteristics. After completing the R adjustment work, the lead frame 80
be separated from

Furthermore, it goes without saying that the tip of the fixed contact terminal 1l''2 may protrude from the flush side end surface of the base.

As shown in FIGS. 7 to 10, the movable contact piece block 20 is constructed by insert-molding the central part of a pair of movable contact pieces 22 and 23 arranged in parallel on an insulating base 21 made of synthetic resin. The insulating stand 2I is symmetrical, and the insulating stand 2I is provided with a through hole 24.24 for secondary molding in the center thereof, and support portions 25, 25 projecting upward on opposite side edges of the insulating stand 21. is provided.

On the other hand, the movable contact pieces 2, 2, and 3 are formed by punching out a conductive thin plate, and have both ends cut out in width directions.
It is divided into parts, and movable contacts 22a and 23a are respectively fixed to the lower surface of one end, and movable contacts 22b and 23b are respectively fixed to the lower surface of the other end. Further, the movable contact pieces 22, 23 extend laterally from approximately the center of the long side, and have raised portions 22c, 23c formed by bending, and extend from the upper ends of the raised portions 22c, 23c. The hinge springs 26, 26 each protrude from the support portion 25.25 of the insulating stand 21 so as to be substantially parallel to the direction in which the movable contact piece 22.23 extends.

Furthermore, a welded portion 26 located at the tip of the hinge spring 26
a is at a position bent and extended in the opposite direction to the protruding direction, and the positioning arm 27 extends on the extension line.

As shown in FIGS. 11 and 12, the movable iron piece 30 is made of a plate-like material having a substantially rectangular plane, and has a bulge 31 formed by protruding it in the center, and uses its ridge line 31a as a rotation fulcrum. Through-holes 32 and 32 for insert shaping are provided at positions facing each other with the bulge 31 in between, and a temporary magnetic shield 33 is attached and integrated at one end of the upper surface. There is.

Then, as shown in FIGS. 13 to 16, the movable iron plate 30 is attached to the support portion 25 of the movable contact piece block 30.
2, the through hole 32.32 and the through hole 24.24 of the insulating stand 2l are overlapped and communicated with each other, and secondary insert molding is performed on these to form a connecting body having a substantially U-shaped cross section. 34, the movable contact piece block 20 and the movable iron piece 30 are integrated.

Next, the insulating stand 2l of the movable contact piece block 20 is fitted into the fitting recess l8 of the base 10, and the positioning arm 27 of the hinge spring 26 is slid and fitted into the positioning vertical groove 17a of the base lO. After positioning, weld the weld 26a of the hinge spring 26 to the weld receiving part 1 of the common terminal l3.
3a, the welded portion 2 of the hinge spring 26
6a and the ridge line 31a of the movable iron piece 30 are arranged on substantially the same plane.

The electromagnet block 40 has a permanent magnet 42 disposed on an iron core 4l having a substantially U-shaped cross section to form a substantially E-shaped cross section, and is insert-molded in a spool 43, so that the magnetic pole portion 42a of the permanent magnet 42 is attached to the spool. The left side magnetic pole part 41a of the iron core 41 is exposed from the lower surface of the flange part 43b of the spool 43, and the six-side toothed body dlhA { Tribute? It is exposed from the lower surface of the tjI1 portion 43c of the spoon hole 43.

Coil terminals 44.44 and 45.45 are insert-molded in the flanges 43b and 43c of the spool 43, respectively, and the curly portions 44a. The lead wires of the coil 46 wound around the spool 43 are respectively tied to the spool 44a and soldered to the coil 44a.

The electromagnet block 40 has coil terminals 44, 4.
4,45.45 to coil terminal hole 1 of base 10 5,1
5, 1 6.1 6, respectively, and insert the flange 43a,
By appropriately injecting a solvent adhesive between 43c and base 10, they are fixedly integrated.

As a result, the movable iron piece 30 is held rotatably with its bulging portion 3l adsorbed to the magnetic pole 42a of the electromagnetic block 40, and the movable iron piece 30's rotating wheel center and the movable contact pieces 22, 23
This means that the rotational axes of are located on the same plane.

Note that at this stage, the base 10 is connected to the connecting members 81 a,
Lead frame Q n Iy, llI So 4th Tanaka ms fortune telling all through 8 l b, 8 2a, Q 2e
The I 1 97br Kitadori terminal 13 is separated from the lead frame 80 and connected to the connecting members 8 1a, 8 l.
Since it is electrically independent from coil terminals 44 and 82a and 82e, it is possible to test the operating characteristics of the electromagnetic relay by energizing the coil terminals 44 and 45.

In this inspection, if the predetermined operating characteristics are not obtained, the fixed contact terminal 1 protruding from the side end surface of the base IO
1.1 2 tongue pieces 1lb. 12b with a straightening jig (not shown) to straighten both sides of the load curve S (see Fig. 18). Sz is adjusted so that it is located between the predetermined suction force curves, and the weld receiving portion 13a of the common terminal 13 protruding from the upper edge of the base 1O is adjusted in the same manner as described above. Note that it is preferable to increase the size of the lead frame 80 so that this adjustment work can be easily performed.

Then, after the net adjustment work is completed, the electromagnetic relay, which is a semi-finished product that is being assembled, is separated from the lead frame 80 (FIG. 17).

The base reinforcing members 50 and 60 have a shape that can be fitted to the lower edge of the base IO, respectively, and connect the coil terminal holes 5 1.5 1 and 6l, 6l to the base IO.
The positioning protrusion 10a is inserted into the coil terminals 44.44 and 45.45 of the electromagnet block 40 protruding from the lower surface of the base lO, and has positioning recesses 52.52 and 62.62 protruding from the lower surface of the base lO. ,I
Oa (the positioning protrusion on the back side is not shown).

The case 70 has a box shape that can be fitted to the base 10. After fitting the case 70 to the base IO and injecting a sealing agent 90 into a recess 71 (FIG. 3) formed on the back surface of the base 10 and solidifying it, The assembly work is completed by venting the internal gas through the gas vent hole 18a of the base 1O and thermally melting and sealing the gas vent hole 18a.

Next, the operation of the electromagnetic appliance having the above-mentioned structure will be explained.

In the case of non-excitation, the right end portion 30b of the movable iron piece 30 is attracted to the right magnetic pole portion 4lb of the iron core 4l due to the magnetic flux of the permanent magnet 42 (indicated by the dotted line in FIG. 19), thereby closing the magnetic circuit. There is. For this reason, the movable contact 22 of the movable contact piece 22.23
a. 23a is in contact with fixed contacts 11a, lla, while movable contacts 22b. 23b is the fixed contact 12a. l2a
It is separated from

Next, as shown in FIG. 20, a magnetic flux (
When a voltage is applied to the coil 46 to excite the coil 46 so as to generate a voltage (shown by a dashed line), the left end 30a of the movable iron piece 30 is attracted to the left magnetic pole 41a of the iron core 4l, so it resists the magnetic force of the permanent magnet 42. Then, after the movable iron piece 30 rotates about the ridge line portion 31a and the right end portion 30b of the movable iron piece 30 separates from the right side magnetic pole portion 4lb of the iron core 4l, the movable iron piece 3
The left end 30a of the iron core 4l is attracted to the left magnetic pole 41a of the iron core 4l (FIG. 21). Therefore, after the movable contacts 22a, 23a of the movable contact piece 22.23 are separated from the fixed contacts 11a, Ila, the movable contacts 22b, 23b are connected to the fixed contact 12a.
．． 12a.

Then, when the coil 46 is de-energized, the movable contact piece 2
2.2 The movable iron piece 30 returns to its original position due to the spring force in step 3, the hinge spring 26, the lance, etc., and the movable contact 2
2a, 23a and 22b, 23b switch and return to the original state.

In this embodiment, a self-returning type has been described, but this is not necessarily the case. By adjusting the shape of the iron core 41, the spring force of the movable contact pieces 22, 23, etc., a self-retaining type can also be used. good.

It goes without saying that the present invention is not limited to the electromagnetic relay having the structure as in the embodiment described above, but can be applied to any structure in which a terminal is inserted into the base.

(Effects of the Invention) As is clear from the above description, according to the present invention, the assembly and inspection can be performed while connected to the lead frame. Since adjustments can be made, the processing speed of each process is increased, the number of production steps is significantly reduced, and assembly accuracy is improved.

[Brief explanation of the drawing]

An example of the electrical appliance is shown, with Figure 1 being an exploded perspective view, Figure 2 being a plan sectional view, Figure 3 being a front sectional view, Figure 4 being a right side sectional view, and Figures 5 and 6 being a base. 7 to 10 show the movable contact piece block, FIG. 7 is a plan view, FIG. 8 is a front view, FIG. 9 is a bottom view, and FIG. is the right side, Figures 11 and 12 are the plan view and front view of the movable iron piece, and Figures 13 to 1.
Figure 6 shows an integrated movable contact piece block and movable iron piece, Figure 13 is a plan view, Figure 14 is a partial cross-sectional front view, Figure 15 is a bottom view, and Figure 16 is a right side partial cross-section. figure,
Fig. 17 is a perspective view showing the electromagnetic relay in the middle of assembly, Fig. 18 is a graph showing the load curve of operating characteristics, and Fig. 18 is a graph showing the load curve of operating characteristics. 9 to 21 are explanatory diagrams for explaining the operation process. lO...Base, 11.12...Fixed contact terminal (terminal member), 13...
- Common contact terminal (terminal member), 80... Lead frame, 8 1a, 8 lb, 8 2a to 8 2e... Connection member. 11 Figure 30 5+ Figure 12 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21

Claims (1)

[Claims] (1) Molding a base by inserting a terminal member and a connecting member integrally provided in a lead frame, separating the terminal member from the lead frame, assembling the parts to each base, and then cutting the connecting member. A method of manufacturing an electromagnetic relay characterized by the following.