High-reliability electromagnetic relay

Abstract

The utility model relates to a high-reliability electromagnetic relay, which comprises a bottom plate, a shell, an electromagnetic assembly and a contact system, the electromagnetic assembly comprises a coil framework arranged on the bottom plate, a coil arranged on the coil framework, an iron core arranged in the coil framework, an armature rotationally arranged on the coil framework and matched with the iron core, and a pushing frame in linkage fit with the armature and used for pushing the movable contact spring to execute opening and closing actions; a hook is arranged at the position, corresponding to the upper portion of one end of the armature, of the coil framework, a buckling groove matched with the hook is formed in one end of the armature, a buckling arm matched with the buckling groove is arranged on the hook, the buckling arm is buckled in the buckling groove, and limiting matching of the armature and the buckling arm is formed. The utility model has the advantages of simple structure, stable and reliable performance, convenient assembly and high reliability.

Description

Technical Field

[0001] The utility model specifically relates to an electromagnetic relay, and more specifically to a highly reliable electromagnetic relay. Background Art

[0002] An electromagnetic relay is an electronic control device. It has a control system (also known as the input circuit) and a controlled system (also known as the output circuit). It is usually applied to an automatic control circuit. In fact, it is a kind of "automatic switch" that uses a smaller current and a lower voltage to control a larger current and a higher voltage. Therefore, it plays roles such as automatic regulation, safety protection, and circuit conversion in the circuit. With the development of low-voltage electrical appliances, the application of electromagnetic relays is becoming more and more extensive, and the requirements for electromagnetic relays are also getting higher and higher. In the existing electromagnetic relay, the connection between the armature and the coil bobbin is not compact, resulting in unreliable attraction between the armature and the iron core and insufficient attraction force. Moreover, the electromagnetic relay also has defects such as complex structure, unreliable performance, and cumbersome assembly. Summary of the Invention

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a highly reliable electromagnetic relay with a simple structure, stable and reliable performance, and convenient assembly.

[0004] To achieve the above purpose, the utility model adopts a highly reliable electromagnetic relay, which includes a bottom plate, a housing arranged on the bottom plate, an electromagnetic component, and a contact system. The contact system includes a moving reed arranged on the bottom plate and two static contacts arranged on the bottom plate and cooperating with the moving reed. The electromagnetic component includes a coil bobbin arranged on the bottom plate, a coil arranged on the coil bobbin, an iron core arranged inside the coil bobbin, an armature rotatably arranged on the coil bobbin and cooperating with the iron core, and a push frame linked with the armature and used to push the moving reed to perform opening and closing actions. A hook is arranged above one end of the armature on the coil bobbin. A buckling groove cooperating with the hook is arranged on one end of the armature. A buckling arm cooperating with the buckling groove is arranged on the hook. The buckling arm is buckled in the buckling groove, and a limit cooperation between the armature and the buckling arm is formed.

[0005] The beneficial effects of the above structure are as follows: A hook cooperating with the armature is arranged on the coil bobbin. The buckling arm of the hook is buckled in the buckling groove, and the hook plays a limiting role on the armature, so as to ensure reliable attraction between the armature and the iron core and effectively solve the problem of insufficient attraction force of the product. Moreover, the electromagnetic component adopts a modular structure design, which is convenient for modular assembly of the electromagnetic component and the bottom plate, and the assembly efficiency is higher. Therefore, the electromagnetic relay has the advantages of simple structure, stable and reliable performance, convenient assembly, and high reliability.

[0006] Specifically, the hook has two inserts symmetrically distributed. Two slots matching with the two inserts are arranged on the coil bobbin. The two inserts are inserted into the two slots, forming a snap-fit connection between the hook and the coil bobbin. The hook is inserted into the coil bobbin through the two inserts, facilitating the assembly of the hook and the coil bobbin and improving the assembly efficiency.

[0007] Specifically, a snap-fit groove matching with the push frame is arranged at the other end of the armature. A limiting groove matching with the snap-fit groove is arranged at one end of the push frame. The snap-fit groove is buckled in the limiting groove. The armature and the push frame are connected by a snap-fit method, facilitating the assembly of the armature and the push frame and making the assembly more convenient.

[0008] Specifically, a snap-fit post matching with the moving reed is arranged at the other end of the push frame. A snap-fit hole matching with the snap-fit post is arranged on the moving reed. The snap-fit post is snapped into the snap-fit hole, forming a snap-fit connection between the snap-fit post and the moving reed. The push frame is snapped onto the moving reed through the snap-fit post, facilitating the assembly of the push frame and the moving reed and making the assembly more convenient.

[0009] Specifically, a guiding convex block matching with the push frame is arranged on the base plate. A guiding groove matching with the guiding convex block is arranged on the push frame. The guiding convex block is inserted into the guiding groove, forming a sliding connection between the push frame and the base plate. The guiding convex block guides the push frame, ensuring the reliable movement of the push frame on the base plate and improving the working reliability of the electromagnetic relay. Description of the Drawings

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

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

[0012] Figure 3 It is an exploded view of an embodiment of the present utility model. Detailed Embodiment

[0013] As Figures 1 to 3As shown in the figure, an embodiment of the utility model is a highly reliable electromagnetic relay, which includes a bottom plate 10, a housing 11 arranged on the bottom plate 10, an electromagnetic component 20, and a contact system 30. The contact system 30 includes a moving reed 31 arranged on the bottom plate 10 and two static contacts 32 arranged on the bottom plate 10 and cooperating with the moving reed 31. The electromagnetic component 20 includes a coil bobbin 21 arranged on the bottom plate 10, a coil 22 arranged on the coil bobbin 21, an iron core 23 arranged inside the coil bobbin 21, an armature 24 rotatably arranged on the coil bobbin 21 and cooperating with the iron core 23, and a push frame 25 linked and cooperating with the armature 24 and used to push the moving reed 31 to perform opening and closing actions. Above one end of the armature 24 on the coil bobbin 21, a hook 26 is arranged. On one end of the armature 24, a fastening groove 241 cooperating with the hook 26 is arranged. On the hook 26, a fastening arm 261 cooperating with the fastening groove 241 is arranged. The fastening arm 261 is fastened in the fastening groove 241, and a limiting cooperation between the armature 24 and the fastening arm 261 is formed.

[0014] As Figure 2 , 3 shown in the figure, the hook 26 has two symmetrically distributed insertion pieces 262. On the coil bobbin 21, two slots 211 cooperating with the two insertion pieces 262 are arranged. The two insertion pieces 262 are inserted into the two slots 211, and a clamping connection cooperation between the hook 26 and the coil bobbin 21 is formed. The hook is inserted into the coil bobbin through the two insertion pieces, which is convenient for the assembly of the hook and the coil bobbin, and the assembly efficiency is higher. On the other end of the armature 24, a clamping groove 242 cooperating with the push frame 25 is arranged. On one end of the push frame 25, a limiting groove 251 cooperating with the clamping groove 242 is arranged. The clamping groove 242 is fastened in the limiting groove 251. The armature and the push frame are connected by a clamping cooperation method, which is convenient for the assembly of the armature and the push frame, and the assembly is more convenient. On the other end of the push frame 25, a clamping column 252 cooperating with the moving reed 31 is arranged. On the moving reed 31, a clamping hole 311 cooperating with the clamping column 252 is arranged. The clamping column 252 is clamped in the clamping hole 311, and a clamping connection cooperation between the clamping column 252 and the moving reed 31 is formed. The push frame is clamped on the moving reed through the clamping column, which is convenient for the assembly of the push frame and the moving reed, and the assembly is more convenient. On the bottom plate 10, a guiding convex block 101 cooperating with the push frame 25 is arranged. On the push frame 25, a guiding groove 253 cooperating with the guiding convex block 101 is arranged. The guiding convex block 101 is inserted into the guiding groove 253, and a sliding connection cooperation between the push frame 25 and the bottom plate 10 is formed. The guiding convex block plays a guiding role for the push frame, so as to ensure the reliable movement of the push frame on the bottom plate, which is beneficial to improving the working reliability of the electromagnetic relay.

[0015] A hook that mates with the armature is provided on the coil bobbin. The engaging arm of the hook engages in the engaging groove, and the hook plays a limiting role on the armature, so that the reliable attraction between the armature and the iron core can be ensured, and the problem of insufficient attraction force of the product can be effectively solved. Moreover, the electromagnetic component adopts a modular structure design, which facilitates the modular assembly of the electromagnetic component and the bottom plate, and the assembly efficiency is higher. Therefore, the electromagnetic relay has the advantages of simple structure, stable and reliable performance, convenient assembly, and high reliability.

Claims

1. A high-reliability electromagnetic relay, comprising a base plate, a housing disposed on the base plate, an electromagnetic assembly, and a contact system, wherein the contact system comprises a movable spring disposed on the base plate, and two stationary contacts disposed on the base plate and cooperating with the movable spring, characterized in that: The electromagnetic assembly includes a coil frame arranged on a base plate, a coil arranged on the coil frame, an iron core arranged in the coil frame, an armature rotatably arranged on the coil frame and matched with the iron core, and a pushing frame which cooperates with the armature and is used to push the moving spring to perform opening and closing actions. A hook is arranged on the coil frame at the top corresponding to one end of the armature, a snap-fitting groove matched with the hook is arranged on one end of the armature, a snap-fitting arm matched with the snap-fitting groove is arranged on the hook, and the snap-fitting arm is snap-fitted in the snap-fitting groove to form a limit fit between the armature and the snap-fitting arm.

2. The high reliability electromagnetic relay according to claim 1, characterized in that: The hook has two symmetrically distributed inserts, and the coil frame is provided with two slots matched with the two inserts. The two inserts are inserted in the two slots to form a snap-fit ​​fit between the hook and the coil frame.

3. The high reliability electromagnetic relay according to claim 1 or 2, characterized in that: The other end of the armature is provided with a clamping groove matched with the pushing frame, and one end of the pushing frame is provided with a limiting groove matched with the clamping groove, and the clamping groove is buckled in the limiting groove.

4. The high reliability electromagnetic relay according to claim 1 or 2, characterized in that: The other end of the pushing frame has a clamping column matched with the moving spring piece, and the moving spring piece is provided with a clamping hole matched with the clamping column. The clamping column is clamped in the clamping hole to form a clamping match between the clamping column and the moving spring piece.

5. The high reliability electromagnetic relay according to claim 1 or 2, characterized in that: The bottom plate is provided with a guide protrusion matched with the push frame, and the push frame is provided with a guide groove matched with the guide protrusion. The guide protrusion is inserted in the guide groove to form a sliding connection between the push frame and the bottom plate.

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