CN204230169U - Electromagnetic relay - Google Patents

Abstract

An electromagnetic relay, which includes an insulating shell and an insulating base plate that are interlocked with each other. Two low-voltage binding posts and two high-voltage binding posts are inserted above the insulating shell. A coil is installed in the insulating shell. The center of the coil is A moving iron core is interspersed with activities, and the two ends of the wires of the coil are respectively connected with the corresponding low-voltage terminal posts. A fixed cover is installed above the coil and the moving iron core, and the fixed cover has magnetic conductivity. Push rod, the upper end of the push rod passes through the fixed cover, and a movable contact piece is installed on the upper end of the push rod. The contacts at both ends of the movable contact piece are respectively located under the corresponding high-voltage terminal. The contacts on the chip are against the high-voltage terminal, and a compression spring is supported between the push rod and the insulating housing. The contacts at both ends of the movable contact piece are lifted upwards. The utility model omits the static and dynamic iron core, makes the volume more compact, has the advantages of simple structure and convenient installation, and is suitable for controlling the on-off of higher voltage in more occasions.

Description

Electromagnetic relay

technical field

The utility model relates to a relay switch, in particular to an electromagnetic relay which uses low voltage to control high voltage on-off.

Background technique

Electromagnetic relay is an electronic control device, which has a control system and a controlled system. It is usually used in automatic control circuits. It actually uses smaller current and lower voltage to control larger current and higher voltage. an automatic switch. Electromagnetic relays are generally composed of electromagnets, armatures, spring sheets, contacts, etc., and their working circuits are composed of low-voltage control circuits and high-voltage working circuits. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through the coil, thereby generating an electromagnetic effect, and the armature will overcome the pulling force of the return spring to attract the moving iron core under the action of electromagnetic force, thereby driving the armature The moving contact and the static contact are sucked together. When the coil is de-energized, the electromagnetic suction will disappear, and the armature will return to its original position under the reaction force of the spring, so that the movable contact and the original static contact will be released. In this way, it is attracted and released, so as to achieve the purpose of conducting and cutting off in the circuit. The patent No. "201220022843.8" published by the Chinese Patent Office on September 12, 2012 is "an electromagnetic relay with double contacts". It includes an insulating base, and a coil is installed on the upper part of the insulating base. The two lead-out pins of the winding are inserted on the insulating base, and the common end pin and the normally open end pin are also inserted on the insulating base. The front end of the winding is equipped with an armature, and one end of the armature is fixed with a moving reed. The terminal pin and the normally open terminal pin are each provided with a contact, and the movable reed is provided with two mutually conductive contacts, and the two contacts on the movable reed are respectively connected to the common terminal pin and the normally open terminal pin. Corresponding to the contacts on the reed, when the armature moves under the action of the winding, the two contacts on the moving reed can be in contact with the contacts on the common end pin and the normally open end pin at the same time. The size of this electromagnetic relay is still too large, and it is difficult to apply it to more occasions.

Contents of the invention

The purpose of this utility model is to provide an electromagnetic relay with simple structure and small size to control the on-off of higher voltage for the above-mentioned defects and deficiencies of the prior art.

In order to achieve the above object, the technical solution adopted by the utility model is: the electromagnetic relay includes an insulating shell and an insulating base plate that are interlocked with each other, and two low-voltage binding posts and two high-voltage binding posts are inserted above the insulating shell. A coil is installed in the insulating shell, and the center of the coil is movably interspersed with a moving iron core. The two leading ends of the coil are respectively connected with the corresponding low-voltage terminals. The cover has magnetic conductivity, and a push rod is fixed above the moving iron core. The upper end of the push rod passes through the fixed cover, and a moving contact piece is installed on the upper end of the push rod. The contacts at both ends of the moving contact piece are respectively located on the corresponding high-voltage wiring Below the column, when the moving iron core moves up, the contact on the moving contact piece is against the high-voltage terminal, and a compression spring is supported between the push rod and the insulating housing.

The contacts at both ends of the moving contact piece are lifted up.

A support plate is provided at the bottom of the coil, and a washer is provided under the support plate.

The upper end of the push rod is provided with a spring fixing frame, and the bottom of the compressed spring is embedded in the spring fixing frame.

The lead-out end of the coil is welded to the bottom of the low-voltage terminal.

Two ends of the insulating bottom plate are provided with mounting seats.

In the utility model, as long as the low-voltage terminal is connected, the coil can be energized, and the moving iron core is made magnetic through electromagnetic induction. Since the fixed cover above the moving iron core has magnetic conductivity, the moving iron core moves upward and is attracted to the fixed cover. At this time, the contact on the movable contact piece is offset against the high-voltage binding post, so that the two high-voltage binding posts are conducted. When the low-voltage terminal is powered off, the moving iron core falls, and the high-voltage terminal is disconnected. The utility model omits the static and dynamic iron core, makes the volume more compact, has the advantages of simple structure and convenient installation, and is suitable for controlling the on-off of higher voltage in more occasions.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a sectional view along line A-A of Fig. 1 .

Fig. 3 is a B-B sectional view of Fig. 1 .

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model is an electromagnetic relay, which includes an insulating case 5 and an insulating base plate 2 which are interlocked with each other, and two low-voltage terminals are inserted above the insulating case 5 1 and two high voltage terminals 4. Mounting seats 3 are provided at both ends of the insulating base plate 2 for easy installation. A coil 12 is installed in the insulating housing 5 , and the center of the coil 12 is movably interspersed with a moving iron core 10 . As long as the low-voltage terminal 1 is connected, the coil 12 can be energized, and the moving iron core 10 can be made magnetic through electromagnetic induction. The lead-out end of the coil 12 is welded to the bottom of the low-voltage terminal 1 to make the connection more reliable. The bottom of the coil 12 is provided with a support plate 13 for supporting the coil 12 , and a washer 14 is provided under the support plate 13 . The coil 12 and the moving iron core 10 are covered with a fixed cover 11, and the fixed cover 11 has a magnetic permeability, so when the moving iron core 10 is magnetic, the moving iron core 10 will move upward and be attracted to the fixed cover 11 . A push rod 9 is fixed above the moving iron core 10, the upper end of the push rod 9 passes through the fixed cover 11, and a movable contact piece 8 is installed on the upper end of the push rod 9, and the contacts at both ends of the movable contact piece 8 are respectively located at the corresponding Below the high-voltage terminal 4. When the moving iron core 10 moved up, the contact on the moving contact piece 8 was offset against the high-voltage terminal 4 . The contacts at both ends of the movable contact piece 8 are tilted up, so that the pressure between the contacts and the high-voltage terminal 4 is more reliable. A compression spring 6 is supported between the push rod 9 and the insulating housing 5. When the moving iron core 10 loses its magnetism, the restoring force of the compression spring 6 and the gravity of the moving iron core 10 make the moving iron core 10 fall back quickly. Disconnect the two high-voltage terminals 4 from the surface. The upper end of the push rod 9 is provided with a spring fixing frame 7, and the bottom of the compression spring 6 is embedded in the spring fixing frame 7 to prevent the compression spring 6 from slipping out. the

Claims (6)

1. An electromagnetic relay, which includes an insulating case (5) and an insulating bottom plate (2) that are fastened to each other, and two low-voltage terminals (1) and two high-voltage terminals are inserted above the insulating case (5). The terminal (4) is equipped with a coil (12) in the insulating shell (5), the center of the coil (12) is movably interspersed with a moving iron core (10), and the two leads of the coil (12) are respectively connected to the corresponding The low-voltage terminal (1) is connected, and it is characterized in that the coil (12) and the moving iron core (10) are covered with a fixed cover (11), the fixed cover (11) has magnetic permeability, and the moving iron core (10) ) is fixed above the push rod (9), the upper end of the push rod (9) passes through the fixed cover (11), and the upper end of the push rod (9) is equipped with a moving contact piece (8), the moving contact piece (8) The two ends of the contacts are respectively located under the corresponding high-voltage terminal (4), and when the moving iron core (10) moves up, the contacts on the moving contact piece (8) are offset against the high-voltage terminal (4), and the push A compression spring (6) is supported between the rod (9) and the insulating housing (5). 2. The electromagnetic relay according to claim 1, characterized in that the contacts at both ends of the movable contact piece (8) are tilted upward. 3. The electromagnetic relay according to claim 1 or 2, characterized in that a support plate (13) is provided at the bottom of the coil (12), and a washer (14) is provided below the support plate (13). 4. The electromagnetic relay according to claim 1 or 2, characterized in that the upper end of the push rod (9) is provided with a spring fixing frame (7), and the bottom of the compression spring (6) is embedded in the spring fixing frame (7) . 5. The electromagnetic relay according to claim 1 or 2, characterized in that the lead-out end of the coil (12) is welded to the bottom of the low-voltage terminal (1). 6. The electromagnetic relay according to claim 1 or 2, characterized in that mounting seats (3) are provided at both ends of the insulating base plate (2).