JPS5824912B2 - Surge absorber - Google Patents

Description

Detailed Description of the Invention In a motor using a commutator, a back electromotive force is induced in the armature winding due to contact and separation between the commutator and the brushes during rotation, and sparks are generated between the commutator and the brushes. This caused electrical noise and greatly affected brush and commutator wear, shortening the life of the motor.

In order to prevent this spark current between the commutator and the brushes, it is known to use a motor protection surge absorber that utilizes the reverse characteristics of selenium elements.

This is made by soldering several selenium elements for a surge absorber to a surface-treated aluminum plate using a special solder, then soldering the terminals, and then surface-treated.

When several lead wires were taken out from a selenium element, they were taken out at each angle obtained by dividing 360° by the number of lead wires.

When aiming for mass production and cost reduction, it is difficult to use a jig at this angle, and it is difficult to solder a large number of lead wires in one process, causing an increase in man-hours.

The present invention attempts to improve the conventional drawbacks by soldering the terminals in the following manner.

That is, first, the lead wire is bent into a meandering shape and taped, and then at least one of the bent portions of the lead wire is cut.

This bent portion is a portion of the lead wire that is bent in a meandering manner and is parallel to the tape.

Next, pre-solder is applied to the cut end of the lead wire, and pre-solder is applied to the electrodes on the opposite side of the conductor of the plurality of selenium elements attached to the strip-shaped conductor at predetermined intervals. Solder the lead wires at the locations where you have done so.

Thereafter, resin is applied, and the band-shaped conductor is cut at predetermined locations to separate the tapered lead wires.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

FIGS. 1 and 2 are examples of conventional motor protection surge absorbers.

As shown in this figure, each selenium element 2, 3, 4 or 6. on the base plate 1, 5 has a hole for fitting into the rotor shaft. 7.
If, for example, a total of three lead wires are taken out from 8, the angle between each lead wire is 120°.

At this angle, it is difficult to attach the lead wires using an automatic machine using a jig in order to achieve mass production and cost reduction, and it is difficult to solder a large number of lead wires in one process.

Figures 3a to 3c show step-by-step an embodiment of the method of the invention.

First, as shown in Fig. 3a, the lead wire 9 is bent into a meandering shape, and this is pasted on adhesive tape to perform taping.
Cut the lead wire at the bent part as shown in Figure 3.

In this example, the bent portions on both sides of the tape 10 are cut.

Next, apply preliminary solder (for example, 42% Sn) to the tips of the lead wires A...O shown in Figure 3.

B158% solder) and attach a spare lead wire to the electrode on the opposite side of the conductor of the plurality of selenium elements attached to the strip conductor at predetermined intervals, as shown in Fig. 3C. Solder the solder points.

After that, resin is attached, the band-shaped conductor is cut off, and the taped lead wires are separated.

FIG. 4 shows a surge absorber made by the method described above.

As you can see in the figure, the lead wires are connected to each selenium element 2, 3, and 4.
connected in parallel.

FIG. 5 shows an example using a circular base.

According to the present invention, there are the following effects.

That is, since a large number of lead wires are taped, preliminary soldering can be applied at one time, making it possible to fix them all at once.

In addition, it becomes possible to use a continuous board as shown in Figure 3C, which makes it possible to solder a large number of lead wires in one process, improving the uniformity of soldering. Man-hours are significantly reduced.

That is, mass production and cost reduction can be achieved.

Moreover, storage and handling in each process are extremely easy due to the shape.

Although both sides of the lead wire are cut in this example in FIG. 3, there is also a method in which only one side is cut.

When this method is used, the lead wires are difficult to move during soldering.

Also, after soldering, the process of peeling off the tape from the lead wire and cutting the connected part of the lead wire is as follows:
Whichever comes first will be better.

[Brief explanation of the drawing]

1 and 2 are plan views showing a conventional motor protection surge absorber using selenium elements, and FIGS. 3A to 3C are plan views showing an embodiment of the present invention step by step.
4 and 5 are plan views of a surge absorber manufactured by the method of the present invention. 1 and 5 are bases, 2, 3, 4, 6, 7 and 8 are selenium elements, 9 is a lead wire, and 10 is a tape.

Claims (1)

[Claims] 1. The process of bending the lead wire into a meandering shape and chipping it, the process of cutting at least one of the bent parts of the lead wire, the process of applying preliminary solder to the tip, and the process of attaching the lead wire to the strip conductor at a predetermined interval. a step of soldering the lead wire at a preliminary soldering point to an electrode on the opposite side of the conductor of a plurality of selenium elements; a step of cutting the strip-shaped conductor at a predetermined point; and the taped lead wire. A method for manufacturing a surge absorber, comprising a step of separating wires.