CN218887078U - Electromagnetic relay - Google Patents

Abstract

The utility model discloses an electromagnetic relay, which comprises a shell, and an iron core, an armature, a coil component and a reset spring which are arranged in the shell; the coil assembly comprises the PCB board, is provided with the iron core through-hole in the middle of the PCB board, and the PCB board around the iron core through-hole is gone up to encircle and is provided with the metal connecting wire, plays the effect of coil through the metal connecting wire.

Description

Electromagnetic relay

Technical Field

The utility model relates to a relay field, in particular to electromagnetic relay.

Background

The main relay in use in the market is an electromagnetic relay, and patents such as patent 201880084493.8 can see that the electromagnetic relay mainly comprises an iron core, a coil, an armature, a contact yellow piece and the like. When the electromagnetic switch is used, the coil is electrified to generate magnetic force, so that the armature iron drives the movable contact and the fixed contact to be attracted under the attraction of the electromagnetic force. When the coil is powered off, the electromagnetic attraction disappears, and the armature returns to the original position under the counterforce of the spring, so that the movable contact and the fixed contact are separated. Through the processes of attracting and disconnecting, the design purposes of conducting and disconnecting in the circuit are achieved. The main problems of the existing electromagnetic relay are that the size of the electromagnetic relay is relatively large due to the existence of the coil, the heat productivity is high, and the cost is relatively high.

The most important problem of using coils is that when an electromagnetic relay needing delay control is used, the electromagnetic relay is mostly realized by adding a damping copper sleeve on an iron core of a direct current electromagnetic voltage relay and utilizes the principle of electromagnetic damping to generate delay. When the electric appliance is electrified, because the armature is at a release position, the air gap is large, the magnetic resistance is large, the magnetic flux is small, and the damping effect of the copper sleeve is relatively small, the time delay of the armature in the process of attraction is not significant (generally ignored). When the relay is powered off, the magnetic flux variation is large, the copper sleeve has a large damping effect, and the armature is released in a delayed manner to play a delayed role. Therefore, such relays are only used as a power-off delay. The electromagnetic relay with the time delay control has short time delay, generally the longest time can not exceed 5s, and the accuracy is low, and generally the electromagnetic relay is only used in occasions with low requirements.

Therefore, an electromagnetic relay with a wide delay range, high delay precision, reduced size, better shock and vibration resistance, and convenient adjustment is needed.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a time delay scope is wide, the time delay precision is high, can reduce the volume, more shock-resistant and vibrations and adjust convenient electromagnetic relay.

The utility model provides an electromagnetic relay, which comprises a shell, and an iron core, an armature, a coil component and a reset spring which are arranged in the shell; the coil assembly comprises a PCB, an iron core through hole is formed in the middle of the PCB, metal connecting wires are arranged on the PCB around the iron core through hole in an encircling mode, and the metal connecting wires play a role in a coil.

Preferably, the metal connecting wire is attached to the PCB by electroplating.

Preferably, the PCB is a multilayer PCB, and the metal connection line is disposed on each layer.

Preferably, the PCB further comprises a control circuit, and the control circuit is also arranged on the PCB.

The utility model discloses an electromagnetic relay's beneficial effect does:

1. by using a PCB board instead of a coil, the volume can be reduced and the impact resistance can be improved.

2. Through setting up control circuit in coil pack to make the regulation easier, delay range is wide and the time delay precision is high.

Drawings

Fig. 1 is a schematic structural diagram of an electromagnetic relay according to the present invention;

fig. 2 is a schematic structural diagram of a PCB of the electromagnetic relay of the present invention;

the reference numbers in the figures: 1. the device comprises a shell, 2, an iron core, 3, a coil assembly, 4, an armature, 5, a reset spring, 6, a break contact, 7, a make contact, 31, a PCB, 32, a metal connecting wire, 33, an iron core through hole, 41 and a movable contact.

The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 2, an embodiment of the electromagnetic relay of the present invention is provided:

an electromagnetic relay includes a housing 1, and an iron core 2, an armature 4, a coil block 3, and a return spring 5 provided in the housing 1.

Coil pack 3 comprises PCB board 31, is provided with iron core through-hole 33 in the middle of PCB board 31, and iron core 2 sets up in iron core through-hole 33, and iron core 2 bottom is connected with casing 1. The PCB board 31 is the multilayer PCB board, all is provided with metal connecting wire 32 on every layer, and metal connecting wire 32 is attached to on the PCB board 31 and metal connecting wire 32 encircles the setting of iron core through-hole 33 through the mode of electroplating, plays the effect of coil through metal connecting wire 32. A control circuit is arranged on one layer of the PCB and connected with the metal connecting wire 32, and the metal connecting wire 32 is controlled through the control circuit.

The bottom of the armature iron 4 is connected with the shell 1, the other side of the armature iron 4 is provided with a movable contact 41, and the position of the shell corresponding to the movable contact 41 is provided with a break contact 6 and a make contact 7. A return spring 5 is connected to the armature 4, and the armature 4 is returned by the return spring 5.

When the electromagnetic breaker is used, a certain voltage is applied to the metal connecting wire 32 on the PCB 31, a certain current flows through the PCB, so that an electromagnetic effect is generated, the armature 4 is attracted to the iron core 2 under the action of the electromagnetic force attraction by overcoming the tension of the return spring 5, and the movable contact 41 of the armature 4 is driven to leave the break contact 6 and is attracted to the make contact 7. After the power supply is stopped, the electromagnetic attraction force disappears, and the armature iron 4 returns to the original position under the counterforce of the return spring 5, so that the movable contact 41 is attracted with the original break contact 6. Through the attraction and the release, the purposes of conduction and disconnection in the circuit are achieved. Meanwhile, due to the PCB structure, the delay time action of the relay can be easily controlled by waiting for the control.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structural changes made by the contents of the specification and the drawings, or the direct or indirect application in other related technical fields, are included in the same way in the protection scope of the present invention.

Claims (4)

1. An electromagnetic relay comprises a shell, and an iron core, an armature, a coil assembly and a return spring which are arranged in the shell; the coil component is characterized in that the coil component is composed of a PCB, an iron core through hole is formed in the middle of the PCB, and a metal connecting wire is arranged on the PCB around the iron core through hole in an encircling mode and plays a role of a coil.

2. The electromagnetic relay according to claim 1, wherein said metal connection line is attached to said PCB by means of electroplating.

3. The electromagnetic relay according to claim 1, wherein the PCB board is a multi-layer PCB board, each layer having the metal connection line disposed thereon.

4. The electromagnetic relay according to claim 1, further comprising a control circuit, said control circuit also being disposed on said PCB board.

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