JPH0562579A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To lessen bouncing of an electric contact. CONSTITUTION:A resilient conductive plate 4 is supported by a support 5 made of an insulative material while the base end 4a is consolidated in a single piece with the armature 3. A controlling member 6 made of insulative material is fixed with its center to the armature 3 in such an arrangement that control pieces 6b extending from the center 6a to both sides substantially contact the rear surface of the foremost part 4c of a conductive plate 4 fitted with a movable contact 4d. When this contact 4d collides with a stationary contact 4e, the control pieces 6b restrain the movable contact 4d from hopping off from the stationary contact 4e resulting in less bouncing of the contact.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to electromagnetic relays.

[0002]

2. Description of the Related Art As a conventional electromagnetic relay, an iron core, a coil wound around the iron core, an armature that is sucked and released by the iron core, and a movable contact that makes contact with and separates from a fixed contact are provided on one side of the tip. There is provided a conductive plate having a spring property provided on the base plate, and a support made of an insulating material that integrally supports the base end portion of the conductive plate on the armature.

[0003]

In the above-mentioned conventional electromagnetic relay, when the movable contact comes into contact with the fixed contact and collides, the movable contact jumps due to the collision, the vibration of the conductive plate, or the like causes the movable contact. Causes so-called contact bounce, which causes noise in signal transmission, which makes it difficult to switch signals at high speed, and may cause accelerated contact damage when switching a load.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electromagnetic relay capable of reducing contact bounce.

[0005]

In order to solve the above-mentioned problems, an electromagnetic relay of the present invention comprises an iron core, a coil wound around the iron core, and an armature sucked and released on the iron core. Electromagnetic provided with a conductive plate having a spring property, in which a movable contact for contacting with and separating from a fixed contact is provided on one surface of a tip, and a support made of an insulating material for integrally supporting a base end of the conductive plate on an armature. In the relay, a restricting member made of an insulating material, which is substantially in contact with the back surface of the tip of the conductive plate provided with the movable contact, is integrally provided on the armature.

[0006]

According to the electromagnetic relay of the present invention, since the regulating member made of an insulating material which is substantially in contact with the rear surface of the tip of the conductive plate provided with the movable contact is integrally provided on the armature, the movable contact serves as the fixed contact. When abutting and colliding, jumping of the movable contact from the fixed contact is restricted by the restricting member, making it difficult to jump, that is, contact bounce can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 denotes an iron core, which is made of a magnetic material such as electromagnetic soft iron and is formed in a U-shape by the central piece 1a and the opposing pieces 1b and 1c.

Reference numeral 2 denotes a coil, which is wound around the central piece 1a of the iron core 1. Reference numeral 3 is an armature, which is formed of a magnetic material such as electromagnetic soft iron into a flat plate shape, and the center of which is rotatably supported by a supporting member (not shown) provided so as to cover the coil 2 to perform a seesaw motion. Parts 3b and 3c are opposite pieces 1b and 1c of the iron core 1.
It is supposed to be released by suction.

Numeral 4 is a conductive plate, which is arranged in parallel by a leaf spring material such as phosphor bronze on both sides of the armature 3 in the longitudinal direction, and each base end portion 4a has a support member which will be described later.
It is supported by 5 and is integrally molded with the armature 3.
Each of the two conductive plates 4 has a lead-out piece 4b at the center thereof, and both ends 4c are provided with slits so as to be formed in a twin shape.
A movable contact 4d that comes into contact with and separates from the fixed contact 4e is provided on one surface of 4c.

Reference numeral 5 denotes a support, which is made of an insulating material such as synthetic resin to support the two conductive plates 4 and supports the armature 3 as described above.
Is integrally molded in the central part of.

Reference numeral 6 denotes a regulating member, which is integrally fixed to the tips of both ends 3b and 3c of the armature 3 by an insulating material such as synthetic resin having excellent heat resistance and moldability such as fluororesin or polyimide resin. The central portion 6a and the restriction pieces 6b extending from the central portion 6a to both sides so as to be substantially in contact with the back surface of the front end portion 4c of the conductive plate 4 provided with the movable contact 4d. At this time, the restricting member 6 is arranged outside the opposing pieces 1b, 1c so that both ends 3b, 3c of the armature 3 can be sucked and released by the opposing pieces 1b, 1c of the iron core 1.

Next, the operation will be described. When the coil 2 is excited, the armature 3 is rotatably supported at the center by a supporting member, and the armature 3 is attracted to the iron core 1 by performing a seesaw motion and is provided on one end 4c of one of the two conductive plates 4. The movable contact 4d contacts the fixed contact 4e. Due to the impact at the time of contact, the movable contact 4d jumps from the fixed contact 4e and tries to cause so-called contact bounce, but the conductive plate 4 provided with the movable contact 4d.
Since the restricting piece 6b of the restricting member 6 is substantially in contact with the back surface of the tip end portion 4c, the movable contact 4d is restricted by the restricting piece 6b and the movable contact 4d is unlikely to jump. Then, after the movable contact 4d comes into contact with the fixed contact 4e, the armature 3 further moves until it is attracted to the iron core 1, so that the conductive plate 4 bends to have a contact pressure. Therefore, the restriction piece of the restriction member 6
The state where 6b is almost in contact with the tip 4c of the conductive plate 4
It is set within the range where 4 bends and a certain contact pressure can be secured. If the seesaw motion of armature 3 is reversed,
The two conductive plates 4 are movable contacts 4d provided on the other end 4c.
Contacts the fixed contact 4e and operates in the same manner as above.

In this embodiment, the regulating member 6 is an armature.
It is fixedly attached to the tips of both ends 3b and 3c of 3 and is integrally provided, but the movable contact 4d is also provided along the conductive plate 4 from the support 5 which is also integrally provided at the center of the armature 3. Alternatively, the restriction member 6 may be formed by extending the restriction piece 6b that is substantially in contact with the back surface of the tip 4c of the conductive plate 4.

[0015]

In the electromagnetic relay of the present invention, since the regulating member made of an insulating material which is substantially in contact with the back surface of the tip of the conductive plate provided with the movable contact is integrally provided on the armature, the movable contact serves as the fixed contact. When the contact abuts and collides, the movable contact jumps from the fixed contact, and it is difficult for the movable contact to jump because it is restricted by the restricting member, that is, contact bounce can be reduced, and thus noise is less likely to occur in signal transmission. This facilitates high-speed signal switching, reduces contact damage during load switching, and prolongs service life.

[Brief description of drawings]

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

FIG. 2 is a side view of the above.

[Explanation of symbols]

 1 Iron core 2 Coil 3 Armature 4 Conductive plate 4a Base end 4c Tip 4d Moving contact 4e Fixed contact 5 Support 6 Control member

Claims (1)

[Claims] 1. An iron core, a coil wound around the iron core, an armature that is sucked and released by the iron core, and a movable contact that contacts and separates from a fixed contact are provided on one surface of the tip end portion and has a spring property. In an electromagnetic relay equipped with a conductive plate and a support made of an insulating material that integrally supports the base end of the conductive plate on the armature, an insulating material made of an insulating material that is approximately in contact with the back surface of the tip of the conductive plate with movable contacts The electromagnetic relay is characterized in that the regulating member of is provided integrally with the armature.