JP2551735B2 - Polarized electromagnetic relay and method of adjusting its characteristics - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fulcrum type polarized electromagnetic relay and a method for adjusting its moving / opening characteristics.

[0002]

2. Description of the Related Art A fulcrum-type polarized electromagnetic relay comprises a contact spring block, a polarized electromagnet block, a body block and a cover. The contact spring block and the polarized electromagnet block are press-fitted into the body block and the cover is covered. Are configured. Conventionally, as shown in FIG. 5, a contact spring block 100
It is known that the movable contact spring piece 101 constituting the above is integrally provided with a support piece 102 having a substantially T-shaped tip in the widthwise direction at the center in the longitudinal direction ( See, for example, JP-A-61-218027). Therefore, in the adjusting method of the moving / opening characteristic, the spring force due to the twist of the support piece 102 acts on the movable contact spring piece 101 by twisting the support piece 102 in the direction of the arrow, so that the twist amount of the support piece 102 is adjusted. Thus, the contact pressure between the fixed contact and the movable contact spring piece 101 is adjusted.

[0003]

In the prior art, as shown in FIG. 5, the support pieces 102 projecting from both ends of the contact spring block 100 are also used as contact pieces. Then, after the contact spring block 100 and the polarized electromagnet block are press-fitted into the body block, the support piece 102 is surrounded by the body block and is not exposed, so that the support piece 102 cannot be twisted from the outside. Therefore, there is a problem in that it is difficult to adjust the moving / opening characteristics by making the cover operable in a polarized electromagnetic relay before fitting the cover to the body block.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to easily finely adjust the moving / opening characteristics of a polarized electromagnetic relay from the outside. It is an object of the present invention to provide a polar electromagnetic relay that can be implemented and a method for adjusting its characteristics.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is a rotary fulcrum type polar electromagnetic relay comprising a contact spring block, a polar electromagnet block and a body block, wherein the contact spring block is An adjusting part bent in the longitudinal direction and a fixing part bent perpendicular to the adjusting part are integrally projected at approximately the central part of the movable contact spring piece to be formed, and the adjusting part is formed of a bent part and an unbent part. It was done.

According to a second aspect of the present invention, there is provided a contact spring block, which is a method for adjusting a moving / opening characteristic of a rotary fulcrum type polarized electromagnetic relay including a contact spring block, a polar electromagnet block and a body block. A state in which an adjusting portion bent in the longitudinal direction and a fixing portion bent perpendicular to the adjusting portion are integrally provided at substantially the center of the movable contact spring piece, and the fixing portion is fixed to the contact member of the body block. Then, the bending voltage of the bending portion forming the adjusting portion is adjusted to adjust the moving voltage and the open-circuit voltage.

[0007]

The fixed portion formed in the substantially central portion of the movable contact spring piece is fixed to the contact member of the body block perpendicularly to the longitudinal direction, so that there is no influence on the moving / opening characteristics. Then, only the bending portion forming the adjusting portion is bent, and the bending voltage and the open-circuit voltage are finely adjusted from the outside only by changing the bending angle.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is an exploded perspective view of the polar electromagnetic relay excluding the cover, FIG. 2 is an exploded perspective view of the polar electromagnetic relay before the cover is covered, and FIG. 3 is a perspective view of the movable contact spring piece. FIG. 4 is a side view of a movable contact spring piece.

As shown in FIGS. 1 and 2, the polarized electromagnetic relay includes a contact spring block 1 and a polarized electromagnet block 2.
A body block 3 and a cover 4, and the contact spring block 1 and the polar electromagnet block 2 are connected to the body block 3
It is configured to be press-fitted in and covered with a cover 4.

As shown in FIG. 1, the contact spring block 1 includes a magnetic armature 10 formed in a flat plate shape, and a pair of movable contact spring pieces 11 arranged on both sides of the armature 10 in the longitudinal direction. And a support 12 made of an insulating resin and formed to integrally support the armature 10 and the movable contact spring piece 11. The pair of movable contact spring pieces 11 are arranged in point symmetry.

The movable contact spring piece 11 is made of a conductive leaf spring, and as shown in FIG. 3, a notch is formed in the end portion extending from the approximate center in the width direction and bent upward in the longitudinal direction. The adjusting part 13 and the fixing part 14 which is perpendicular to the adjusting part 13 and is bent downward are integrally formed. Further, the adjusting portion 13 has a bending portion 13a.
And a non-bent portion 13b, and a cutout portion 13c is formed at the boundary thereof. The width W1 of the bent portion 13a is equal to the unbent portion 1
It is formed larger than the width W2 of 3b.

In addition, a slit 15 having an opening at each end is formed at both ends in the longitudinal direction so as to be easily bent. Further, contact members 16a and 16b are fixed to each tip. The contact member 16a is a make contact, and the contact member 16b is a break contact.

In the polarized electromagnet block 2, as shown in FIG. 1, a plate-shaped permanent magnet 20 is held by a holding member 21 made of a magnetic material, and further, the holding member 21 and an electromagnet 22 in which a coil is wound around an iron core. Both ends are integrated by a pair of supports 23 made of an insulating resin. Further, since the permanent magnet 20 is biasedly held by the holding member 21 toward the one support member 23 side, the polarized electromagnetic relay operates in a monostable type. In addition,
Reference numeral 24 is a flat coil terminal portion for supplying power to the coil.

The body block 3 is formed of an insulating resin into a box body 30 having an open upper surface, and the contact spring block 1 and the polarized electromagnet block 2 are press-fitted into the box body 30.

Further, a contact piece 32 for connecting to the fixed portion 14 of the movable contact spring piece 11 is provided on the central outer wall surface of each side wall 31 standing upright in the longitudinal direction of the box body 30. Further, a concave cutout 34 is formed in a central portion of the side wall 33 standing upright in the width direction of the box body 30 and facing the tip end surface 10a of the armature 10. On the bottom surface of the cutout portion 34, a flat plate-shaped terminal member 35 that is connected to the coil terminal portion 24 that is connected to the end of the coil is provided.

Ribs 36 are provided at the four inner corners of the box 30.
Are formed. The rib 36 is provided with a fixed contact 38 that comes into contact with the contact members 16a and 16b via a fixed contact plate 37.

Each side wall 31 erected in the longitudinal direction of the box body 30
A coil terminal 39 integrally formed with the terminal member 35 by a conductive material, a fixed terminal 40 integrally formed with the fixed contact 38 by a conductive material, and a common terminal integrally formed with the contact piece 32 by a conductive material. 41 are exposed and project downward.

The assembly of the polarized electromagnetic relay is performed by first press-fitting the polar electromagnet block 2 into the body block 3 and then the contact spring block 1. Next, the contact piece 32, the fixing portion 14, the terminal member 35, and the coil terminal portion 24 which are in contact with each other are welded and fixed by the laser.

A method of adjusting the moving / opening characteristics of the polarized electromagnetic relay configured as described above will be described. As shown in FIG. 2, in the state before the cover 4 is covered, only the bending portion 13a of the adjusting portion 13 that is bent upward in the longitudinal direction is bent in the arrow A or B direction as shown in FIG. Then, the bending angle with respect to the movable contact spring piece 11 is adjusted.

First, when the bent portion 13a is bent in the direction of arrow A, the contact member 16a is a make contact, so that the movable contact spring piece 11 on the contact member 16a side with respect to the fixed contact 38 is formed.
The spring force of increases. Therefore, the operating voltage, which is the coil voltage when the contact member 16a operates, decreases. In this case, the open circuit voltage, which is the coil voltage when the contact member 16a is released from the contact state with the fixed contact 38, also decreases.

On the other hand, when the bending portion 13a is bent in the direction of arrow B, the spring force of the movable contact spring piece 11 on the side of the contact member 16a with respect to the fixed contact 38 decreases. Therefore, the contact member 1
The open voltage, which is the coil voltage when releasing 6a from the contact state with the fixed contact 38, increases. In this case, the operating voltage, which is the coil voltage when the contact member 16a operates, also increases.

The width W1 of the bent portion 13a is the same as the unbent portion 13b.
Is larger than the width W2 and the bent portion 13a is close to a rigid body, the adjusting effect is large. If the non-bent portion 13b is also bent, the non-bent portion 13b is close to the elastic body, and the adjustment effect of the bent portion 13a is lost.

[0023]

As described above, according to the present invention, the fixed portion formed by projecting substantially at the center of the movable contact spring piece is
Since it is fixed to the contact member of the body block perpendicularly to the longitudinal direction of the movable contact spring piece, there is almost no effect on the moving / opening characteristics due to welding conditions for fixing. In addition, by only changing the bending angle of the bending portion near the rigid body of the adjusting portion formed by bending the movable contact spring piece in the longitudinal direction, it is possible to easily and effectively perform fine adjustment of the moving voltage and the open-circuit voltage from the outside. You can do it.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a polarized electromagnetic relay excluding a cover.

FIG. 2 is an exploded perspective view of a polarized electromagnetic relay before covering with a cover.

FIG. 3 is a perspective view of a movable contact spring piece.

FIG. 4 is a side view of a movable contact spring piece.

FIG. 5 is a perspective view of a conventional contact spring block.

[Explanation of symbols]

1 ... Contact spring block, 2 ... Polarized electromagnet block, 3 ...
Body block, 4 ... Cover, 10 ... Armature, 11 ... Movable contact spring piece, 13 ... Adjusting section, 13a ... Bending section, 13b
... unbent part, 14 ... fixed part, 16a, 16b ... contact member, 20 ... permanent magnet, 22 ... electromagnet, 32 ... contact piece (contact member).

Claims (2)

(57) [Claims] 1. A rotary fulcrum type polarized electromagnetic relay comprising a contact spring block, a polarized electromagnet block, and a body block, which is bent in the longitudinal direction at a substantially central portion of a movable contact spring piece constituting the contact spring block. A polarized electromagnetic relay characterized in that an adjusting portion and a fixing portion bent perpendicularly to the adjusting portion are integrally provided so as to project, and the adjusting portion is formed of a bent portion and an unbent portion. 2. A method of adjusting a moving / opening characteristic of a rotary fulcrum type polarized electromagnetic relay comprising a contact spring block, a polarized electromagnet block and a body block, wherein a movable contact spring piece constituting the contact spring block is omitted. In the central part, an adjusting part bent in the longitudinal direction and a fixing part bent perpendicularly to the adjusting part are integrally projected, and the adjusting part is fixed in a state where the fixing part is fixed to the contact member of the body block. A method for adjusting a moving / opening characteristic of a polarized electromagnetic relay, which is characterized by adjusting a bending angle of a bending portion to be formed and adjusting a moving voltage and an open circuit voltage.