JPH0451419A - Adjusting method for electromagnetic relay - Google Patents

Abstract

PURPOSE:To adjust an operating voltage and a return voltage with ease and accuracy by attaching a holder slidably to a movable contact piece, moving the holder, adjusting the operating characteristics, and fixedly integrating the holder with the movable contact piece. CONSTITUTION:A holder 30 is attached slidably to a movable contact piece 21. The elastic deformation of the movable contact piece 21 is regulated on the part where the holder 30 is present. A movable block 3 is mounted on a magnet block 2 which is contained in a recess 5 of a base 1 and supported turningly movable. The operating voltage and the return voltage of an electromagnetic relay are measured. When the voltage is larger than a tolerated range, the holder 30 is moved to the base side of the movable contact piece 21 to increase the spring force of the movable contact piece 21 so that a movable iron piece 20 can start turning movement when the operating voltage and the return voltage reaches the tolerated range. When the voltage is smaller, the holder 30 is moved to the free end side of the movable contact piece 21 for adjustment. The holder 30 is fixedly integrated with the movable contact piece 21 by heat or ultrasonic waves.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method for adjusting an electromagnetic relay.

(Prior art and invention or problem to be solved) Conventionally,
For example, as shown in FIG. 2, an electromagnetic relay is generally based on base 1. There is one consisting of an electromagnetic block 2, a movable block 3, and a case 4.

The base 1 has a box shape, and a recess 5 is formed between side walls 6.6 on both sides, and a common terminal 7. Fixed contact terminal 8. The coil terminal 9 is integrated, and the fixed contact 10 (
(The fixed contact in the front is not shown).

Each terminal7. 8. Each of the connection parts 9 (the connection part of the front terminal 89 is not shown) is exposed upward.

The electromagnet block 2 has a spool 1 attached to a substantially U-shaped iron core 11.
The coil 13 is wound through the spool 12.
The permanent magnet 15 is exposed upward from the holding part 14 formed at the center of the spool 12, and the flange parts 1.
From 6, 1.6, both ends of the iron core 11 ], ], a, ]
, ]b is exposed upward. The electromagnet block 2, in which the lead wire of the coil 13 is tied to the coil hanging part 18 of the relay terminal 17, is housed in the recess 5 of the base 1, and the relay terminal 17 is connected to the connecting part of the coil terminal 9 ( (not shown).

The movable block 3 has movable contact pieces 21 and 2 arranged side by side on both sides of a movable iron piece 20 made of a magnetic plate, and a support part 2 at the center thereof.
2 are integrated. A substantially T-shaped connecting portion 23 extends in the center of the movable contact piece 21, and the supporting portion 22
protrudes laterally from the side of the Further, both end portions of the movable contact piece 21.21 are divided into two parts in the width direction, and a movable contact point 24 is provided on the lower surface of each tip end, resulting in a so-called twin structure. And this movable block 3
The support part 22 is connected to the permanent magnet 1 of the electromagnetic block 2.
5 and is rotatably supported.

The case 4 has a box shape with a bottom, and is fitted into the base 1 to form an internal space.

In the electromagnetic relay having the above configuration, when the electromagnetic block 2 is energized and demagnetized, both ends of the movable iron piece 20 are connected to the iron core 1.
is alternately attracted to both ends 11a and llb of 1 and rotated,
Accordingly, the movable contact 24 of the movable contact piece 21 comes into contact with and separates from the fixed contact 10 of the fixed contact terminal 8.

By the way, since the movable contact piece 21 is formed by press working, the plate thickness may vary and the spring constant may vary. As a result, in an electromagnetic relay that connects and separates contacts by driving a contact piece, a holder that prevents partial elastic deformation of the movable contact piece is slidably attached to the movable contact piece, and the holder is moved to adjust the operating characteristics. After adjustment, it is fixed and integrated with the movable contact piece.

(Example) Next, an example of an electromagnetic relay to which the present invention is applied will be described with reference to FIG.

Compared to the conventional example described above, the electromagnetic relay has a movable contact piece 21.
The only difference is that a holder 30 is provided.

That is, the porter 30 is made of a resin material and has a cylindrical shape with a rectangular cross section, and allows the movable contact piece 21 to be press-fitted into the through hole 31. Note that a relief portion 3 is provided in the center of the through hole 31 so that the movable contact 23 can pass therethrough.
2 is provided.

The porter 30 is inserted through both ends of each movable contact piece 21 and positioned approximately at the center of the portion protruding from the support portion 22. In this manner, when the holder 30 is slidably attached to the movable contact piece 21,
The pressure at the contact point where the holder 30 exists is affected, and the operating voltage and return voltage may deviate from the allowable range, and adjustment work may have to be performed in a subsequent process. In addition, the movable iron piece 20. Since the iron core 11 is plated, the driving distance of the movable iron piece varies depending on the plating thickness of the abutting portion, which may cause variations in contact pressure, necessitating the same adjustment work as described above.

However, the adjustment work involves, for example, partially plastically deforming the movable contact piece 21 to change the spring constant, and such a conventional adjustment method is not easy.
It took a lot of time.

In particular, in the adjustment work described above, it is extremely difficult to accurately set the operating voltage and return voltage to the median value of the allowable range.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for adjusting an electromagnetic relay that can easily and accurately adjust the operating voltage and return voltage.

(Means for Solving the Problems) In order to achieve the above object, the present invention regulates the elastic deformation of the movable contact piece 21 at the movable contact portion by the movable iron piece that rotates based on the excitation and internal magnetization of the electromagnet. be done. For this reason,
The spring constant of the movable contact piece 21 changes depending on the mounting position of the holder 30.

Therefore, after placing the movable block 3 on the electromagnetic block 2 housed in the recess 5 of the base 1 and supporting it rotatably, the operating voltage and return voltage of the electromagnetic relay are measured, and if these voltages are within the allowable range. If the operating voltage and return voltage are within the allowable range, move the holder 30 to the base side of the movable contact piece 21, increase the spring force of the movable contact piece 21, and remove the movable iron piece 20 when the operating voltage and return voltage are within the allowable range. Adjust to rotate. If it is smaller than the allowable range, move the holder 30 to the free end side of the movable contact piece 21, and adjust so that the movable iron piece 20 rotates when the operating voltage and return voltage fall within the allowable range, as described above. do. If the desired operating voltage and return voltage are obtained in this way, the porter 30 is fixed and integrated with the movable contact piece 21 by heat, ultrasonic waves, or the like.

In this embodiment, since the halter 30 is attached to the movable contact piece 21 having a twin structure, there is an advantage that positional deviation of the divided pieces can be corrected. However, the present invention is also applicable to structures other than twin structures.

In addition, the spring constant of the movable contact piece 21, the iron core 11, the movable iron piece 2
If the plating thickness of 0 is managed for each predetermined range, Holter
Since the mounting position of 30 can be predicted, the adjustment work becomes even easier.

Furthermore, the holder 30 is not limited to the electromagnetic relay of this embodiment, but is also applicable to other types of electromagnetic relays.

(Effects of the Invention) As is clear from the following explanation, in the electromagnetic relay according to the present invention, the spring constant of the movable contact piece can be adjusted by simply sliding the Holter attached to the movable contact piece, and the electromagnetic relay Since the operating voltage and return voltage of the relay can be adjusted within the permissible range, the adjustment work can be performed more easily and accurately than in the prior art. In particular, since it is easy to set the adjustment value to the center of the allowable range, there is an effect that the reliability of the electromagnetic relay can be improved.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an electromagnetic relay according to the present invention, and FIG. 2 is an exploded perspective view of an electromagnetic relay according to a conventional example. 2... Electromagnetic block, 3... Movable block, 11
・Iron core, 20 ・Movable iron piece, 21 Movable contact piece, 23・
Movable contact, 30 ・Holder

Claims (1)

[Claims] (1) In an electromagnetic relay in which a movable iron piece that rotates based on the excitation and demagnetization of an electromagnet drives a movable contact piece to connect and separate contacts, the movable contact piece is provided with a holder that prevents its partial elastic deformation. 1. A method for adjusting an electromagnetic relay, which comprises attaching the holder in a slidable manner, adjusting the operating characteristics by moving the holder, and then fixing and integrating the holder into a movable contact piece.