Miniature electromagnetic relay with auxiliary contact

Abstract

The utility model relates to a miniature electromagnetic relay with an auxiliary contact, 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. An auxiliary contact assembly matched with the armature is arranged on the bottom plate; the auxiliary contact assembly comprises an auxiliary static contact arranged on the bottom plate, an auxiliary movable reed arranged on the bottom plate and matched with the auxiliary static contact, an auxiliary movable contact arranged on the auxiliary movable reed and matched with the auxiliary static contact, and an ejector rod arranged on the auxiliary movable reed in a linkage mode. The auxiliary static contact is provided with a guide hole for the push rod to pass through, one end of the push rod passes through the guide hole and abuts against the armature, and linkage cooperation of the push rod and the armature is formed. The utility model has the advantages of simple structure, stable and reliable performance, heavy load and auxiliary contact.

Description

Technical Field

[0001] The utility model specifically relates to an electromagnetic relay, in particular to a small electromagnetic relay with auxiliary contacts. 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 existing small electromagnetic relays do not have auxiliary contact functions and cannot meet the user's use requirements. In addition, the contact system structure design of the electromagnetic relay 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 auxiliary 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 small electromagnetic relay with auxiliary contacts, 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 static contacts arranged on the coil frame. The base plate is provided with an auxiliary contact component matched with the armature. The auxiliary contact component includes an auxiliary static contact arranged on the base plate, an auxiliary movable spring piece arranged on the base plate and matched with the auxiliary static contact, an auxiliary movable contact arranged on the auxiliary movable spring piece and matched with the auxiliary static contact, and a push rod linked to the auxiliary movable spring piece. A guide hole for the push rod to pass through is provided on the auxiliary static contact. One end of the push rod passes through the guide hole and abuts against the armature, and constitutes a linkage match between the push rod and the armature.

[0005] The beneficial effect of the above structure is that an auxiliary contact assembly matched with the armature is arranged on the bottom plate, and the armature drives the auxiliary moving spring to move through the top rod, thereby realizing the auxiliary contact function of the small electromagnetic relay, and the guide hole of the auxiliary static contact can guide the top rod, thereby facilitating the improvement of the working reliability of the auxiliary contact assembly. The auxiliary contact assembly adopts a modular structure design, thereby facilitating the modular assembly of the auxiliary contact assembly and the bottom plate, and the assembly efficiency is higher. Therefore, the small electromagnetic relay has the advantages of simple structure, stable and reliable performance, and auxiliary contacts.

[0006] In particular, the other end of the push rod has a clamping boss, the auxiliary movable spring is provided with a clamping hole matched with the clamping boss, the clamping boss is clamped in the clamping hole, and the clamping boss and the auxiliary movable spring are clamped together. The push rod and the auxiliary movable spring are connected by a clamping fit, so that the assembly of the push rod and the auxiliary movable spring is convenient and the assembly is more convenient.

[0007] In particular, 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 skeleton is provided with a partition portion that separates the stationary contacts of the two stationary contacts, and the partition portion is inserted into the slot. The movable spring piece adopts a double movable contact structure design with a large contact gap, which can carry a high current load and meet the use requirements of new energy vehicles. And the partition portion of the coil skeleton is separated between the two stationary contacts, which can ensure the insulation performance between the two stationary contacts, and the insulation performance is better.

[0008] In particular, the coil frame is provided with an insulating partition separating the yoke and the coil, which can enhance the insulation performance between the coil and the yoke, and is beneficial to improving the working reliability of the small electromagnetic relay.

[0009] In particular, the coil frame is provided with snap-fit ​​grooves at both sides of the corresponding insulating partition, and the insulating partition has inserting pieces at both sides, which are engaged in the snap-fit ​​grooves and form a snap-fitting of the insulating partition and the coil frame. The insulating partition and the coil frame are connected by snap-fitting, so as to facilitate the assembly of the coil frame and the insulating partition, and the assembly efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0011] Figure 2 A cross-sectional view of an embodiment of the utility model.

[0012] Figure 3 This is an internal structure diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0013] like Figures 1 to 3 As shown, the embodiment of the utility model is a small electromagnetic relay with auxiliary contacts, 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 skeleton 21 arranged on the base plate 11, a yoke 22 arranged on the coil skeleton 21, a coil 23 arranged on the coil skeleton 21, an iron core 24 arranged in the coil skeleton 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 31 linked to the armature 25, two static contacts 32 arranged on the coil skeleton 21, and the An auxiliary contact assembly 40 cooperating with the armature 25 is arranged on the base plate 10, and the auxiliary contact assembly 40 includes an auxiliary static contact 41 arranged on the base plate 10, an auxiliary moving spring 42 arranged on the base plate 10 and cooperating with the auxiliary static contact 41, an auxiliary moving contact 421 arranged on the auxiliary moving spring 42 and cooperating with the auxiliary static contact 41, and a push rod 43 linked to the auxiliary moving spring 42. The auxiliary static contact 41 is provided with a guide hole 411 for the push rod 43 to pass through. One end of the push rod 43 passes through the guide hole 411 and abuts against the armature 25, thereby constituting a linkage cooperation between the push rod 43 and the armature 25. The other end of the push rod 43 has a clamping boss 431, and the auxiliary movable spring piece 42 is provided with a clamping hole 422 that matches the clamping boss 431. The clamping boss 431 is clamped in the clamping hole 422, and constitutes a clamping fit between the clamping boss 431 and the auxiliary movable spring piece 42. The push rod and the auxiliary movable spring piece are connected by a clamping fit, so that the assembly of the push rod and the auxiliary movable spring piece is convenient, and the assembly is more convenient.

[0014] like Figure 1 and 3As shown, one end of the movable spring piece 31 has two contact arms 311 that match the two static contacts 32, and the movable spring piece 31 is formed with a slot 312 between the two contact arms 311, and the two contact arms 312 are provided with two movable contacts 313 that match the static contacts 321 of the two static contacts 32, and the coil skeleton 21 is provided with a partition part 211 that is separated between the static contacts 321 of the two static contacts 32, and the partition part 211 is inserted into the slot 312. The movable spring piece adopts a double movable contact structure design, with a large contact gap, can carry a 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. The coil skeleton 21 is provided with an insulating partition 26 that is separated between the yoke 22 and the coil 23. The insulating partition can enhance the insulation performance between the coil and the yoke, which is conducive to improving the working reliability of the small electromagnetic relay. The coil frame 21 is provided with snap-fit ​​grooves 212 at both sides of the insulating partition 26, and the insulating partition 26 has inserting pieces 261 at both sides. The inserting pieces 261 are engaged in the snap-fit ​​grooves 212, and form a snap-fitting of the insulating partition 26 and the coil frame 21. The insulating partition and the coil frame are connected by snap-fitting, so as to facilitate the assembly of the coil frame and the insulating partition, and the assembly efficiency is higher.

[0015] An auxiliary contact assembly that matches the armature is arranged on the bottom plate. The armature drives the auxiliary moving spring to move through the top rod, thereby realizing the auxiliary contact function of the small electromagnetic relay, and the guide hole of the auxiliary static contact can guide the top rod, which is conducive to improving the working reliability of the auxiliary contact assembly. The auxiliary contact assembly adopts a modular structure design, which is conducive to the modular assembly of the auxiliary contact assembly and the bottom plate, and the assembly efficiency is higher. Therefore, the small electromagnetic relay has the advantages of simple structure, stable and reliable performance, and auxiliary contacts.

Claims

1. A small electromagnetic relay with auxiliary contacts, 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 piece linked to the armature and two stationary contacts arranged on the coil frame, characterized in that: An auxiliary contact assembly cooperating with the armature is arranged on the base plate, and the auxiliary contact assembly includes an auxiliary static contact arranged on the base plate, an auxiliary moving spring arranged on the base plate and cooperating with the auxiliary static contact, an auxiliary moving contact arranged on the auxiliary moving spring and cooperating with the auxiliary static contact, and a push rod linked to the auxiliary moving spring. A guide hole for the push rod to pass through is arranged on the auxiliary static contact, one end of the push rod passes through the guide hole and abuts against the armature, and constitutes a linkage cooperation between the push rod and the armature.

2. The small electromagnetic relay with auxiliary contacts according to claim 1, characterized in that: The other end of the push rod is provided with a clamping boss, and the auxiliary movable spring is provided with a clamping hole matched with the clamping boss. The clamping boss is clamped in the clamping hole, and the clamping boss and the auxiliary movable spring are clamped together.

3. The small electromagnetic relay with auxiliary contacts according to claim 1 or 2, 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.

4. The small electromagnetic relay with auxiliary contacts according to claim 1 or 2, characterized in that: The coil frame is provided with an insulating partition separating the yoke and the coil.

5. The small electromagnetic relay with auxiliary contacts 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.

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