JPS5812725B2 - How to connect the coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to, for example, a method for connecting a coil lead wire in a coil spool to which a coil terminal piece for fixing the coil lead wire is attached.

Conventionally, in an electromagnetic relay, when electrically connecting the lead wires at both ends of an electromagnetic coil to a terminal piece, if the relay is installed in a place where the relay vibrates, the lead wire is broken due to vibration of the terminal piece.

To prevent this, between the electromagnetic coil and the terminal piece,
Pull out the coil lead wire with some slack,
A method is used in which the ends of the coil lead wire wound around the terminal piece are connected by brazing.

By the way, when the above connection method is performed manually, the coil lead wire must be wound around the terminal piece while maintaining a slack state between the electromagnetic coil and the terminal piece, and The work of brazing the wound end of the coil lead wire in this slack state is extremely troublesome and requires skill, and the worker cannot adapt to continuous work over a long period of time, and the workability is poor. be.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for connecting coils, which can solve the above-mentioned drawbacks and allow the connection to be made simply and easily with the coil lead wire having slack.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 10 denotes an iron core fitted onto the coil spool 11 and fixed to the base 13 of the yoke 12.

Reference numeral 14 denotes an electromagnetic coil wound around the coil spool 11. By energizing this coil 14, the iron core 10 is excited, and the movable iron piece 16 is attracted to the magnetic pole surface 15 of the iron core 10.

When the energization is interrupted, the elastic force of the hinge spring 17 supported by the yoke 12 causes the movable iron piece 16 to move toward the magnetic pole surface 15.
distance from.

In this way, by the operation of the movable iron piece 16, the hinge spring 1
The contacts 19 of the movable contact piece 18 extending from the coil spool 11 alternately contact and separate from the contacts 24 and 25 of the fixed contact pieces 22 and 23 supported by the upper and lower brim portions 20 and 21 of the coil spool 11.

26 is a pair of terminal pieces for the electromagnetic coil 14, and as shown in FIG.
has been incorporated into.

A movable contact piece 18 is provided on the base 29 where the terminal block 27 is set.
A terminal hole (not shown) into which the external terminal 31 of and the external terminal 32.33 of the fixed contact piece 22.23 are inserted, and a terminal hole 34 into which the terminal end 26 is inserted are formed.

In this embodiment, the terminal block 27 is connected to the coil spool 1.
The lower flange portion 21 of 1 is also used.

As shown in FIG. 3, the terminal piece 26 is integrally formed with a connecting piece 35 projecting upward, a press-fitting piece 36 extending laterally, and an external terminal 37 extending downward.

The connecting piece 35 has an e[n-shaped coil winding portion 3B.
A connecting portion 39 is formed in succession to the narrow width portion 38a of the coil winding portion 38 to connect the winding end of a coil leader wire, which will be described later, and a bulging portion 40 is further formed at the outer end of the connecting portion 39. It is formed.

The press-fitting piece 36 is then press-fitted into a recess 41 of the terminal block 27 that communicates with the fitting groove 28, as shown in FIG.

The work of connecting the coil lead wire 42 of the electromagnetic coil 14 to the terminal piece 26 of the electromagnetic relay as described above is performed in the following procedure.

First, connect the coil lead wire 42 to the electromagnetic coil 14 and the terminal piece 26.
from one side of the tapered coil winding part 38 to the other, that is, from the wide part 38b side to the narrow part, in a tensioned state as shown in FIG. 4a without slack. 38a side, and then, as shown in Fig. 4b, the winding end 42a of the coil lead wire 42 is wound around the connection part 39, and then, as shown in Fig. 4c, the winding end 42a is brazed. 43 to make the connection.

In this way, the coil lead wire 42 is wound around the tapered coil winding part 38 in a tensioned state without being slackened between the electromagnetic coil 14 and the connecting piece 35 of the terminal piece 26, so that the winding The winding work is extremely easy compared to the conventional work of winding the coil lead wire 42 with slack.

As shown in FIG. 4c, after the winding end 42a of the coil lead wire 42 is brazed 43, the coil lead wire 42 wound around the tapered coil winding portion 38 is pressed in the direction of arrow A. , a tapered coil winding portion 38 as shown in FIG. 4d.
Coil lead wire 4 from the wide part 38b side to the narrow part 38a side.
2 easily deflects, a slack is formed between the electromagnetic coil 14 (FIG. 1) and the connecting piece 35 of the terminal piece 26.

Therefore, even if the terminal piece swings due to mechanical shock or vibration to the electromagnetic relay, the leader wire 42 can be prevented from being cut.

Furthermore, the bulging portion 40 formed at the outer end of the connecting portion 39 can prevent the coil lead wire 42 wound around the connecting portion 39 from coming off and facilitate winding work around the connecting portion 39. .

FIG. 5 shows that the connecting portion 39 formed on the connecting piece 35 of the terminal piece 26 is a wide portion 38b of the tapered coil winding wing.
This shows a modification that follows.

In this case, as shown in FIG. 6a, the narrow portion 3 of the tapered coil winding portion 38 is
8a side toward the wide portion 38b, and then as shown in FIG.
After winding, as shown in FIG. 6c, the winding end 42a is brazed 43 for connection.

In this way, the coil lead wire 42 is pulled slightly between the electromagnetic coil 14 and the connecting piece 35 of the terminal piece 26, and the narrow part 38a side of the tapered coil winding part 38 is pulled. Since it is wound toward the wide part 38b side,
The winding operation can be performed more easily than the method of winding from the wide part 38a to the narrow part 38a as described above.

As shown in FIG. 6c, after brazing 43 the winding end 42a of the coil lead wire 420, if the coil lead wire 42 wound around the tapered coil winding portion 38 is pressed in the direction of arrow B, As shown in FIG. 6d, the coil lead wire 42 is shifted from the wide part 38b side of the tapered coil winding part 38 to the narrow part 38a side, and for the same reason as above, the electromagnetic coil 14 A slack is formed between the terminal piece 26 and the connection piece 35.

According to this invention, a coil terminal piece for fixing a coil lead wire is connected to a connecting part for connecting a winding end of a coil lead wire, a tapered coil winding part provided in series with this connecting part, and a coil spool. The coil drawer is wound from one end to the other end of the tapered coil winding part, and the winding end is fixed by brazing to the connection part, so the coil drawer is fixed. When connecting the wire to the coil terminal piece, the coil can be wound without special consideration such as giving slack to the coil lead wire in advance and winding and connecting it to the coil terminal piece.

In other words, even if the coil lead wire is fixed to the coil terminal piece in a stretched state, the coil lead wire wound around the tapered coil winding part may be stretched from the wide part due to factors such as vibration after fixing. Since it slackens toward the narrow part, it creates slack between the coil lead wire spool and the coil terminal piece, which prevents the coil lead wire from breaking.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of an electromagnetic appliance to which the connection method according to the present invention is applied, Fig. 2 is a sectional view taken along line 2-2 in Fig. 1, Fig. 3 is a perspective view of a terminal piece, and Fig. 4a Figures 4 to 4d are explanatory diagrams of the connection method according to the present invention, Figure 5 is a partial side view showing a modification of the terminal piece, and Figures 6a to 6d are illustrations of a modification of the connection method. . 26... Terminal piece, 38... Tapered coil winding part, 38a... Narrow width part, 38b... Wide width part, 39...
- Connection part, 40...Bulging part, 42...Coil lead wire, 42a...Circling end, 43...Brazing.

Claims (1)

[Claims] 1. A method for connecting a coil in a coil spool to which a coil terminal piece for fixing a coil lead wire is attached,
The coil terminal piece consists of a connecting part for connecting the winding end of the coil lead wire, a tapered coil winding part provided in series with this connecting part, and an attachment part to the coil spool, and the tapered A method for connecting a coil, characterized in that the coil lead wire is wound from one end of the coil winding portion to the other end, and the winding end of the coil lead wire is fixed to the connection portion by brazing.