Large-gap double-contact small electromagnetic relay

Abstract

The utility model relates to a large-gap double-contact miniature electromagnetic relay, which comprises a bottom plate, a shell, an electromagnetic assembly and a contact system, the electromagnetic assembly comprises a coil framework, a yoke, a coil, an iron core and an armature, and the contact system comprises a movable reed arranged on the armature in a linkage manner and two static contacts arranged on the coil framework. One end of the movable contact spring is provided with two contact arms matched with the two static contacts, a slot is formed in the position, corresponding to the position between the two contact arms, of the movable contact spring, and the two contact arms are provided with two movable contacts matched with the static contacts of the two static contacts. The coil framework is provided with a partition plate portion which is arranged between the static contact points of the two static contacts in a separated mode, and the partition plate portion is inserted into the open groove in a penetrating mode. The utility model has the advantages of simple structure, stable and reliable performance, heavy load and large contact gap.

Description

Technical Field

[0001] The utility model specifically relates to an electromagnetic relay, in particular to a large-gap double-contact small electromagnetic relay. Background Art

[0002] An electromagnetic relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current and a lower voltage to control a larger current and a higher voltage. Therefore, it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit. With the development of low-voltage electrical appliances, electromagnetic relays are used more and more widely, and the requirements for electromagnetic relays are also getting higher and higher. The contact system structure design of existing electromagnetic relays is unreasonable, the contact gap is too small, and it cannot carry high current loads and cannot meet the use requirements of new energy vehicles. Summary of the invention

[0003] The utility model aims to overcome the defects of the prior art and provide a small electromagnetic relay with a large gap and double contacts which has a simple structure, stable and reliable performance and a large load.

[0004] To achieve the above-mentioned purpose, the utility model adopts a large-gap double-contact small electromagnetic relay, including a base plate, a shell arranged on the base plate, an electromagnetic component, and a contact system. The electromagnetic component includes a coil frame arranged on the base plate, a yoke arranged on the coil frame, a coil arranged on the coil frame, an iron core arranged in the coil frame, and an armature rotatably arranged on the yoke and matched with the iron core. The contact system includes a movable spring piece linked to the armature and two stationary contacts arranged on the coil frame. One end of the movable spring piece has two contact arms matched with the two stationary contacts. A slot is formed between the movable spring piece corresponding to the two contact arms. Two movable contacts matched with the stationary contacts of the two stationary contacts are arranged on the two contact arms. A partition part is arranged on the coil frame to separate the stationary contacts of the two stationary contacts, and the partition part is inserted in the slot.

[0005] The beneficial effects of the above structure are: the moving spring adopts a double moving contact structure design, the contact gap is large, it can carry high current load, and can meet the use requirements of new energy vehicles. And the partition part of the coil skeleton is separated between the two static contacts, which can ensure the insulation performance between the two static contacts, and the insulation performance is better. Therefore, the small electromagnetic relay has the advantages of simple structure, stable and reliable performance, large load, and large contact gap.

[0006] Particularly, one end of each of the two static contacts has an insertion portion, and the insertion portion passes through the coil bobbin and extends outside the bottom plate. The static contacts are assembled with the coil bobbin and the bottom plate in an insertion manner, which facilitates the assembly of the static contacts with the coil bobbin and the bottom plate, and makes the assembly more convenient.

[0007] Particularly, an insulating partition is provided on the coil bobbin and separates the yoke from the coil. The insulating partition can enhance the insulation performance between the coil and the yoke, which is beneficial to improving the working reliability of the small electromagnetic relay.

[0008] Particularly, clamping grooves are respectively provided on the coil bobbin at both sides corresponding to the insulating partition. Both sides of the insulating partition respectively have insertion pieces, and the insertion pieces are clamped in the clamping grooves, forming a clamping fit between the insulating partition and the coil bobbin. The insulating partition and the coil bobbin are connected in a clamping fit manner, which facilitates the assembly of the coil bobbin and the insulating partition, and has higher assembly efficiency.

[0009] Particularly, a positioning groove is provided on the coil bobbin and is matched with the yoke. One end of the yoke has a positioning portion extending in the positioning groove. One end of the iron core is connected to the positioning portion of the yoke, and the other end of the iron core has a disc portion exposed outside the coil bobbin and is matched with the armature. The positioning portion of the yoke is clamped in the positioning groove of the coil bobbin, which can ensure that the connection between the yoke, the coil bobbin and the iron core is more compact. The iron core is matched with the armature through the disc portion, and the disc portion can increase the suction force of the iron core, thus ensuring that the suction between the iron core and the armature is more reliable. Description of the Drawings

[0010] Figure 1 It is an exploded view of an embodiment of the present utility model.

[0011] Figure 2 It is a sectional view of an embodiment of the present utility model.

[0012] Figure 3 It is an internal structure diagram of an embodiment of the present utility model. Detailed Embodiment

[0013] As Figures 1 to 3As shown, the embodiment of the utility model is a large-gap double-contact small electromagnetic relay, including a base plate 10, a housing 11 arranged on the base plate 10, an electromagnetic assembly 20, and a contact system 30. The electromagnetic assembly 20 includes a coil frame 21 arranged on the base plate 10, a yoke 22 arranged on the coil frame 21, a coil 23 arranged on the coil frame 21, an iron core 24 arranged in the coil frame 21, and an armature 25 rotatably arranged on the yoke 22 and matched with the iron core 24. The contact system 30 includes a movable spring linked to the armature 25. The movable spring piece 31 is provided with two stationary contacts 32 arranged on the coil frame 21. One end of the movable spring piece 31 has two contact arms 311 matched with the two stationary contacts 32. A slot 312 is formed between the two contact arms 311 corresponding to the movable spring piece 31. Two moving contacts 313 matched with the stationary contacts 321 of the two stationary contacts 32 are arranged on the two contact arms 311. The coil frame 21 is provided with a partition part 211 separated between the stationary contacts 321 of the two stationary contacts 32. The partition part 211 is inserted into the slot 312. One end of the two stationary contacts 32 has a pin part 322, and the pin part 322 passes through the coil frame 21 and extends outside the bottom plate 10. The stationary contacts are assembled with the coil frame and the bottom plate by plug-in, so as to facilitate the assembly of the stationary contacts with the coil frame and the bottom plate, and the assembly is more convenient.

[0014] like Figure 1 and 3 As shown, the coil skeleton 21 is provided with an insulating partition 26 separating the yoke 22 and the coil 23. The insulating partition can enhance the insulation performance between the coil and the yoke, which is beneficial to improving the working reliability of the small electromagnetic relay. The coil skeleton 21 is provided with snap-in grooves 212 at both sides of the insulating partition 26, and the insulating partition 26 has inserting parts 261 on both sides. The inserting parts 261 are snapped into the snap-in grooves 212, and constitute the snap-in fit between the insulating partition 26 and the coil skeleton 21. The insulating partition and the coil skeleton are connected by snap-in fit, which facilitates the assembly of the coil skeleton and the insulating partition, and the assembly efficiency is higher. The coil frame 21 is provided with a positioning groove 213 matched with the yoke 22, one end of the yoke 22 has a positioning portion 221 extending in the positioning groove 213, one end of the iron core 24 is connected to the positioning portion 221 of the yoke 22, and the other end of the iron core 24 has a disc portion 241 exposed outside the coil frame 21 and matched with the armature 25. The positioning portion of the yoke is engaged in the positioning groove of the coil frame, so that the connection between the yoke and the coil frame and the iron core can be more compact, and the iron core is matched with the armature through the disc portion, and the disc portion can increase the attraction of the iron core, so that the attraction of the iron core and the armature can be more reliable.

[0015] The moving reed is designed with a double-moving contact structure. The contact gap is large, which can carry high-current loads and meet the usage requirements of new energy vehicles. Moreover, the partition part of the coil skeleton is separated between the two static contacts, which can ensure the insulation performance between the two static contacts and has better insulation performance. Therefore, this small electromagnetic relay has the advantages of simple structure, stable and reliable performance, large load, and large contact gap.

Claims

1. A large-gap double-contact small electromagnetic relay, comprising a base plate, a housing arranged on the base plate, an electromagnetic assembly, and a contact system, wherein the electromagnetic assembly comprises a coil frame arranged on the base plate, a yoke arranged on the coil frame, a coil arranged on the coil frame, an iron core arranged in the coil frame, and an armature rotatably arranged on the yoke and matched with the iron core, and the contact system comprises a movable spring arranged on the armature in linkage, and two stationary contacts arranged on the coil frame, characterized in that: One end of the movable spring piece has two contact arms that match the two stationary contacts, a slot is formed between the two contact arms corresponding to the movable spring piece, the two contact arms are provided with two movable contacts that match the stationary contacts of the two stationary contacts, and the coil frame is provided with a partition portion that separates the stationary contacts of the two stationary contacts, and the partition portion is inserted in the slot.

2. The large-gap double-contact small electromagnetic relay according to claim 1, characterized in that: One end of the two stationary contacts is provided with a pin portion, and the pin portion passes through the coil frame and extends outside the bottom plate.

3. The large-gap double-contact small electromagnetic relay according to claim 1 or 2, characterized in that: The coil frame is provided with an insulating partition separating the yoke and the coil.

4. The large-gap double-contact small electromagnetic relay according to claim 3, characterized in that: The coil frame is provided with snap-fit ​​grooves at both sides corresponding to the insulating partition, and the insulating partition has inserting pieces at both sides. The inserting pieces are engaged in the snap-fit ​​grooves to form a snap-fit ​​fit between the insulating partition and the coil frame.

5. The large-gap double-contact small electromagnetic relay according to claim 1 or 2, characterized in that: The coil frame is provided with a positioning groove matching with the yoke, one end of the yoke has a positioning part extending in the positioning groove, one end of the iron core is connected to the positioning part of the yoke, and the other end of the iron core has a disc part exposed outside the coil frame and matching with the armature.

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