JPH06203720A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To stabilize the operating characteristics for a movable conductive plate of a driving member. CONSTITUTION:An electromagnetic relay is composed of an electromagnet part A, a contact part B having a movable conductive plate 6 fitted with a movable contact 8 which can contact and separate from a stationary contact 10, and a driving member C which opens and closes the contact part B by pushing the movable conductive plate 6 in the direction across the plate thickness interlocking with the operation of the electromagnet part A, wherein the driving member C is guided by guide pieces 6a, 6a extending in the drive direction from the ends of the plate 6. Because the member C is guided by the pieces 6a, 6a extended from the plate 6 as an object member which the driving member C itself drives, eventual inclination owing to a certain gap existing in the area to the guide pieces 6a, 6a will take place while the position relationship with the movable conductive plate 6 is held, so that the operating characteristics for the plate 6 of the driving member C do not vary substantially.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay in which a driving member responsive to an electromagnet section drives a contact section to open and close it.

[0002]

2. Description of the Related Art Conventionally, as an electromagnetic relay of this type, FIG.
And, there is a configuration as shown in FIG. This is a movable contact B _{2 that} can be connected to and separated from the electromagnet A and the fixed contact B _1.
Contact part B having a movable conductive plate B ₃ provided with
And a driving member C that opens and closes the contact portion B by pressing the movable conductive plate B ₃ in the plate thickness direction in response to the above.

More specifically, the electromagnet section A is a coil frame.
The iron core A ₁ wound coils through A _5, the suction and release with the yoke A ₂ coupled to one end of the iron core A _1, the iron core A ₁ and yoke A ₂ Armatures with a permanent magnet A ₄ sandwiched between them
It consists of A ₃ .

The contact portion B is a fixed contact having a movable contact B ₂ provided at the tip of a movable conductive plate B ₃ and a movable contact B ₂ provided at the tip of a fixed contact plate B _4.
They are arranged side by side on the electromagnet section A so that they can come in and out of contact with B ₁ .

The driving member C has an armature A ₃ of the electromagnet portion A fixed to one end thereof, and a shaft hole provided at the other end of the driving member C on a rotary shaft A ₆ projecting from the flange portion of the coil frame A _5. Pivotally supported,
When armature A ₃ is sucked and released between the iron core A ₁ and yoke A _2, substantially driving unit C ₁ rotates around the rotation axis A ₆ is movable conductive plate B ₃ By pressing the center part in the plate thickness direction,
Movable contact B ₂ contacts and separates from fixed contact B ₁ and opens and closes. Then, the case E is attached to the base D with the above-mentioned members properly attached.
The drive member C is attached to the base D and the case E.
It operates so that the upper and lower surfaces are along both inner side surfaces.

[0006]

In the above-mentioned conventional electromagnetic relay, the drive member C has a rotating shaft A ₆ in which a shaft hole provided at the other end is provided so as to project from the flange portion of the coil frame A _5. Although it is rotatably supported by the shaft, there is a slight gap between the shaft hole and the rotating shaft A _6, and the upper and lower surfaces are aligned with the inner surface of both the base D and the case E. In order to operate as well, a gap is required between both inner side surfaces and the upper and lower surfaces, so that the driving member C is irrelevant to the position of the movable conductive plate B ₃ which is the target member of the driving, As indicated by the broken line in FIG. 6, the gap is inclined by the amount of those gaps, and the operating characteristics with respect to the movable conductive plate B _3, that is, the position for pressing and driving, the driving force, and the stroke amount are changed. May increase or the contact pressure may decrease to deteriorate the switching performance.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electromagnetic relay capable of stabilizing the operating characteristics of a driving member with respect to a movable conductive plate.

[0008]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, an electromagnet part, a contact part having a movable conductive plate provided with a movable contact that can be brought into contact with and separated from a fixed contact, and an electromagnet. A driving member that opens and closes the contact portion by pressing and driving the movable conductive plate in the plate thickness direction in response to the portion, wherein the driving member is provided from both ends of the plate width of the movable conductive plate. It is configured to be guided by a guide piece extending in the driving direction.

Further, according to a second aspect of the present invention, the driving member has a configuration in which a portion guided by the guide piece is formed in a convex curved shape.

[0010]

According to the first aspect of the present invention, unlike the conventional example, the drive member is constituted by the guide pieces extending in the drive direction from both ends of the plate width of the movable conductive plate which is the target member to be driven by itself. Since it is guided, even if it is tilted due to a slight gap existing between the guide piece and the guide piece, it is only tilted while maintaining the positional relationship with the movable conductive plate. Does not change much.

Further, according to the second aspect of the present invention, since the portion of the drive member guided by the guide piece is formed in a convex curved surface shape, the friction with the guide piece is small and the operating characteristics are more stable. To do.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This is the electromagnet part A, the contact part B
, A driving member C 1, and a base D 2.

In the electromagnet part A, a T-shaped iron core 1 has a coil 2
Through the inner hole of the coil frame 3 wound around, and one end of the coil frame 3 is caulked to the hole 4a provided in one piece of the Y-shaped yoke 4, and from both ends of the other piece of the yoke 4 The pole pieces 4b, 4b are erected so as to face each other. Then, the two armatures 5, 5 fixed to the drive member C described later by sandwiching the permanent magnet 6 are the iron cores.
The other end of 1 and the two pole pieces 4b, 4b of the yoke 4 are attracted and released.

The contact portion B is a movable conductive plate 6 having a spring property.
However, one side of the electromagnet part A is mounted so that the movable contact 8 whose one end is cantilevered by the movable contact terminal 7 and which is provided at the front end can be brought into contact with and separated from the fixed contact 10 provided at the front end of the fixed contact plate 9. Are installed side by side. Further, guide pieces 6a, 6a are bent and extended from substantially the central portion of the movable conductive plate 6 toward both sides of the plate width toward the fixed contact 10 side in the driving direction. Further, on the other side of the electromagnet portion A, an auxiliary contact portion BB whose spring load is much smaller than that of the contact portion B is arranged in parallel.

The driving member C has two armatures 5, 5 of the electromagnet section A fixed at one end with a permanent magnet 6 sandwiched therebetween, and an axial hole 11 provided at the other end of the coil frame 3. The armature 5 is rotatably supported by the rotating shaft 3a protruding from the flange, and
When it is sucked and released between the yoke and the yoke 4, the rotary shaft 3a rotates and the drive unit 12 presses the movable conductive plate 6 in the plate thickness direction to fix the movable contact 8. Contact part B is opened and closed by contacting and separating from contact 10. The drive portion 12 of the drive member C has a convex curved surface shape in the longitudinal direction of the movable conductive plate 6 and is movable from both sides in the plate width direction of the movable conductive plate 6 toward the fixed contact 10 side in the drive direction. Guide pieces 12a, which are guided by both outer surfaces of guide pieces 6a, 6a provided on 6,
12a has been extended.

The base D is formed in a substantially square shape, and the above-mentioned members are mounted by inserting it into terminal holes that are appropriately provided, and the case 13 is a base for accommodating them.
Covered with D.

In such an electromagnetic relay, the driving member C
Is provided with guided pieces 12a, 12a which are guided by guide pieces 6a, 6a extending in the drive direction from both ends of the width of the movable conductive plate 6 which is a target member to be driven by itself. Even if it tilts due to a slight gap existing between the guide pieces 6a, 6a and the guided pieces 12a, 12a, it only tilts while maintaining the positional relationship with the movable conductive plate 6, so that the driving member
The operating characteristics of C with respect to the movable conductive plate 6, that is, the position for pressing and driving, the driving force and the stroke amount do not change so much, and consequently the operating voltage does not rise and the contact pressure does not drop and the switching performance does not deteriorate. .

In this embodiment, the auxiliary contact portion BB provided on the other side of the electromagnet portion A has a spring load much smaller than that of the contact portion B.
If the ones corresponding to the guide pieces 6a, 6a are provided, the operating characteristics of the driving member C are further stabilized.

Further, in this embodiment, the driving member C rotates about the rotating shaft 3a in response to the electromagnet portion A,
Although 12 is configured to press and drive the movable conductive plate 6 in the plate thickness direction, the movable conductive plate 6 may be movable in parallel to the plate thickness direction without rotating.

Next, a second embodiment will be described with reference to FIG. This is different from the first embodiment only in the shape of the guided pieces 12a, 12a of the driving member C, but the other construction is the same. That is, the guided pieces 12a, 12a are movable conductive plates.
Portions 12b, 12b guided by both outer side surfaces of the guide pieces 6a, 6a provided on 6 are formed so as to project in a convex curved shape in the longitudinal direction of the movable conductive plate 6.

In such an electromagnetic relay, in addition to the effects of the first embodiment, the guided pieces 12a, 12a of the driving member C are provided.
Has less friction with the guide pieces 6a, 6a, and the operating characteristics are more stable.

Next, a third embodiment will be described with reference to FIG. This is different from the first embodiment only in the shapes of the guide pieces 6a, 6a of the movable conductive plate 6 and the drive member C, and the other configurations are the same. That is, the guide pieces 6a, 6a of the movable conductive plate 6 are formed by bending from both sides in the plate width direction of the movable conductive plate 6 toward the fixed contact 10 side in the driving direction in the first embodiment. On the other hand, in the present embodiment, it is formed by bending toward the side opposite to the fixed contact 10 side in the driving direction. The drive member C is inserted so that the driven portion 12 itself is guided by both inner side surfaces of the guide pieces 6a, 6a without the guided pieces 12a, 12a in the first embodiment. The plate 6 is driven to be pressed.

In such an electromagnetic relay, the guided piece
It is not necessary to provide 12a and 12a, and it is possible to obtain the same operational effect as that of the first embodiment with a simpler shape.

[0024]

According to the first aspect of the present invention, unlike the conventional example, the driving member includes guide pieces extending in the driving direction from both ends of the plate width of the movable conductive plate which is a target member to be driven by itself. Since it is guided, even if it is tilted due to a slight gap existing between the guide piece and the guide piece, it is only tilted while maintaining the positional relationship with the movable conductive plate. Does not change so much that the operating voltage rises and the contact pressure does not drop and the switching performance deteriorates.

Further, according to the second aspect of the present invention, since the portion of the drive member guided by the guide piece is formed in a convex curved surface shape, the friction with the guide piece is small and the operating characteristics are more stable.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the above.

FIG. 3 is a partial cross-sectional perspective view showing a main part of a second embodiment of the present invention.

FIG. 4 is a partial cross-sectional perspective view showing a main part of a third embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional example.

FIG. 6 is a cross-sectional view of essential parts showing a state when the driving member of the above is tilted.

[Explanation of symbols]

 A Electromagnet part B Contact part 6 Moving conductive plate 6a Guide piece 8 Moving contact 10 Fixed contact C Driving member

Claims (2)

[Claims] 1. A contact part having an electromagnet part, a movable conductive plate provided with a movable contact that can be brought into contact with and separated from a fixed contact, and a contact part by pressing the movable conductive plate in the plate thickness direction in response to the electromagnet part. And a drive member for opening and closing the electromagnetic relay, the drive member being guided by guide pieces extending in the drive direction from both ends of the plate width of the movable conductive plate. relay. 2. The electromagnetic relay according to claim 1, wherein a portion of the drive member guided by the guide piece is formed into a convex curved surface.