Relay

Abstract

The relay comprises a shell, a bottom cover matched with the shell to form a sealed space, a coil rack arranged in the sealed space, a movable contact piece assembly and a static contact piece assembly, the shell is provided with a communication hole communicated with the sealed space, a plug is arranged at the communication hole, and nitrogen is arranged in the sealed space. According to the principle of the utility model, after the relay is assembled, nitrogen is injected into the relay through the communicating hole, and then the communicating hole is plugged by the plug to realize sealing, so that the nitrogen can be retained in the relay for a long time, and the nitrogen is inert gas and has the functions of heat dissipation and arc extinguishing.

Description

Technical Field

[0001] This utility model relates to relays. Background Technology

[0002] Existing relays generally include a plastic head cover, a housing, a coil frame housed within the housing, a moving contact assembly, and a stationary contact assembly. For example, a relay with Chinese Patent Publication No. CN213877966U includes an insulating head cover, a stationary contact assembly, a moving contact assembly, a housing, a coil assembly, an iron core, and a large magnetic plate. The stationary contact assembly includes a screw, a stationary contact at the lower end of the screw, and a nut threadedly connected to the screw. The moving contact assembly includes a moving contact and a plastic head passing through the moving contact. The plastic head and the moving contact are tightly fitted. One end of the plastic head is installed in a guide post hole at the bottom of the insulating head cover. A spring is provided between the moving contact and the insulating head cover. The insulating head cover includes a plastic body and several pressure posts at the bottom of the plastic body. The pressure posts are integrally injection molded with the plastic body, and the lower end of the pressure posts is tapered, pressing against the large magnetic plate. This type of relay lacks heat dissipation and arc extinguishing mechanisms, and its overload capacity is limited, making it unable to handle large currents. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a relay with arc extinguishing function and good heat dissipation.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a relay, including a housing, a bottom cover that cooperates with the housing to form a sealed space, a coil frame, a moving contact assembly, and a stationary contact assembly disposed within the sealed space. The housing has a connecting hole communicating with the sealed space, and a plug is provided at the connecting hole. Nitrogen gas is contained within the sealed space. The principle of this utility model is as follows: after the relay is assembled, nitrogen gas is injected into the relay through the connecting hole, and then the connecting hole is sealed with the plug to achieve a seal, ensuring that nitrogen gas can remain inside the relay for a long time. Nitrogen gas is an inert gas and has the functions of heat dissipation and arc extinguishing.

[0005] As an improvement, the bottom cover and the outer shell are ultrasonically welded.

[0006] As an improvement, the housing includes a head and side panels, with the connecting hole located in the head.

[0007] As an improvement, the input end of the connecting hole is tapered.

[0008] As an improvement, the inner wall of the housing is provided with a slot, and the coil frame is provided with a locking foot that mates with the slot.

[0009] The beneficial effects of this utility model compared with the prior art are:

[0010] The relay contains nitrogen, an inert gas that serves to dissipate heat and extinguish arcs, thereby improving the relay's current overload capacity. Attached Figure Description

[0011] Figure 1 This is a 3D diagram of a relay.

[0012] Figure 2 This is a cross-sectional view of a relay. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] like Figure 1 , 2 As shown, a relay includes a housing 1, a bottom cover 2 that cooperates with the housing 1 to form a sealed space, a coil frame 6 disposed within the sealed space, a moving contact assembly 4, and a stationary contact assembly 5. The stationary contact assembly 5 is located on both sides of the moving contact assembly 4. The stationary contact assembly 5 includes a stationary contact and a screw electrically connected to the stationary contact. The stationary contact is disposed within the sealed space, and one end of the screw extends from the top of the housing 1. The moving contact assembly 4 is disposed within the sealed space and includes a moving contact, a plastic head passing through and integrally formed with the moving contact, and a spring for pressing the moving contact. An iron core 7 is located at the center of the coil frame 6, and a coil is wound on the coil frame 6. The iron core 7 acts on the plastic head, thereby driving the moving contact. The bottom cover 2 and the outer shell 1 are ultrasonically welded. The outer shell 1 includes a head at the top and side panels around the head. The moving contact assembly 4 and the stationary contact assembly 5 are installed inside the head, and a screw extends from the head. The inner wall of the outer shell 1 is provided with a slot 11, and the coil frame 6 is provided with a locking foot 61 that mates with the slot 11 to achieve a fixed fit between the coil frame 6 and the outer shell 1. The head of the outer shell 1 is provided with a connecting hole 3 that communicates with the sealed space. A plug is provided at the connecting hole 3, and nitrogen gas is provided in the sealed space. Nitrogen gas is injected through the connecting hole 3. The input end of the connecting hole 3 is conical, and the conical hole connects with the injection nozzle, which serves to position the nozzle and increase the contact area.

[0015] The principle of this invention is as follows: After the relay is assembled, nitrogen gas is injected into the relay through the connecting hole, and then the connecting hole is sealed with a plug to ensure that nitrogen gas can remain in the relay for a long time. Nitrogen gas is an inert gas and has the functions of heat dissipation and arc extinguishing.

Claims

1. A relay comprising a housing, a bottom cover cooperating with the housing to form a sealed space, a coil holder provided in the sealed space, a movable contact assembly, and a stationary contact assembly, characterized in that: The shell is provided with a communication hole in communication with a sealed space, the communication hole is provided with a plug, and the sealed space is provided with nitrogen; the bottom cover and the shell are ultrasonically welded; the shell comprises a head and a side wall, and the communication hole is arranged on the head; an input end of the communication hole is in the shape of a tapered hole; an inner wall of the shell is provided with a clamping groove, and the coil holder is provided with a clamping leg matched with the clamping groove.

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