Contact system

Abstract

The utility model discloses a contact system, which comprises a shell, and an electromagnet, a contact support, a static contact and a moving contact which are arranged in the shell, and is characterized in that the static contact is arranged on a static contact piece, the static contact piece is arranged on the left side of the shell in a penetrating manner, the moving contact is arranged at the left lower end of a moving contact bridge, the middle part of the moving contact bridge is hinged in the shell, and the middle part of the moving contact bridge is hinged in the shell. The movable contact bridge is provided with an elastic piece for driving the movable contact bridge to rotate anticlockwise, a movable iron core of the electromagnet can abut against the right end of the movable contact bridge, the contact support is arranged on the upper side of the shell in a penetrating mode, and the lower end of the contact support abuts against the upper end of the right side of the movable contact bridge. According to the contact system, the electromagnet, the contact support, the static contact, the static contact piece, the moving contact, the moving contact bridge and the contact support are all installed in the shell in advance to form an independent contact system, finally the independent contact system is inserted into the base of the switching device, contact structures do not need to be installed in the limited base space one by one, and the assembly process is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of electrical switch technology, specifically to a contact system. Background Technology

[0002] The contact structure of switching electrical appliances is generally directly installed inside the base. For example, Chinese utility model patent application number 201621314174.6 discloses a base assembly for an electric switch, including a base and a cover plate. Multiple contact bridges are movably arranged inside the base, with moving contacts on both sides of each contact bridge. The cover plate has stationary contacts aligned with the moving contacts. A spring is provided between the contact bridges and the base. The base is characterized by having opening slots and mounting plates at both ends of its bottom, and a detachable sealing plug aligned with the contact bridges at the bottom of the base. The mounting plate is detachably installed within the opening slot and can move left and right within the opening slot. This contact structure is relatively cumbersome to install into the base, requiring the internal structures to be installed one by one. Furthermore, the base space is limited, making installation time-consuming and labor-intensive. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a contact system that is easier to assemble.

[0004] Therefore, this utility model is implemented using the following technical solution:

[0005] A contact system includes a housing and an electromagnet, a contact support, and mutually aligned stationary and moving contacts disposed within the housing. The stationary contact is located on a stationary contact plate, which passes through the left side of the housing. The moving contact is located at the lower left end of a moving contact bridge, with the middle portion of the moving contact bridge hinged within the housing. The moving contact bridge is equipped with an elastic element that causes it to rotate counterclockwise. The moving core of the electromagnet can abut against the right end of the moving contact bridge. The contact support passes through the upper side of the housing, and its lower end abuts against the upper right side of the moving contact bridge.

[0006] Furthermore, the housing is provided with a first shaft and a second shaft, the middle part of the movable contact bridge is sleeved on the first shaft, the elastic element is a tension spring, the upper end of the tension spring is hooked on the left part of the movable contact bridge, and the lower end is hooked on the second shaft.

[0007] Furthermore, the electromagnet is located on the right side of the housing, and the right end of the moving contact bridge has a downwardly extending extension, on which the moving iron core of the electromagnet can rest.

[0008] Furthermore, the left end of the housing is provided with an exhaust port, and the left side of the housing is provided with an arc-extinguishing cover that covers the front and rear sides of the moving contact and the stationary contact and is aligned with the exhaust port. The arc-extinguishing cover is provided with a number of arc-extinguishing grid plates, and a magnetic plate is provided on the arc-extinguishing cover.

[0009] Furthermore, the housing is provided with a curtain that blocks the exhaust port, and the curtain is made of a flexible material.

[0010] Furthermore, the housing includes a first housing and a second housing disposed opposite to each other. The first housing and the second housing are provided with a plurality of mutually aligned mounting holes, through which bolts are inserted, and the other end of the bolts is screwed with a nut.

[0011] With the above technical solution, the electromagnet, contact support, stationary contact, stationary contact piece, moving contact, moving contact bridge, and contact support are all pre-installed in the housing to form a separate contact system. Finally, they are inserted into the base of the switchgear. This eliminates the need to install the contact structure one by one in the limited space of the base, making the assembly process more convenient. When a short circuit occurs in the electrical switch, the electromagnet is energized. At this time, the moving iron core moves outward and pushes the moving contact bridge to disconnect the moving contact and the stationary contact. Attached Figure Description

[0012] The present invention includes the following figures:

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the structure without the first shell;

[0015] Figure 3 for Figure 2 A schematic diagram of the structure without the arc-extinguishing shield.

[0016] Reference numerals: 1. Electromagnet; 2. Contact support; 3. Stationary contact; 4. Moving contact; 5. Stationary contact piece; 6. Moving contact bridge; 7. Moving iron core; 8. Elastic element; 9. First shaft; 10. Second shaft; 11. Extension; 12. Exhaust port; 13. Arc extinguishing cover; 14. Arc extinguishing grid; 15. Magnetic guide plate; 16. Door curtain; 17. First housing; 18. Second housing; 19. Mounting hole. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] Referring to the above figures, the contact system provided by this utility model includes a housing and an electromagnet 1, a contact support 2, and mutually aligned stationary contacts 3 and moving contacts 4 disposed within the housing. The stationary contacts 3 are disposed on a stationary contact plate 5, which passes through the left side of the housing. The moving contacts 4 are disposed at the lower left end of a moving contact bridge 6, with the middle portion of the moving contact bridge 6 hinged within the housing. The moving contact bridge 6 is equipped with an elastic element 8 that causes it to rotate counterclockwise. The moving iron core 7 of the electromagnet 1 can abut against the right end of the moving contact bridge 6. The contact support 2 passes through the upper side of the housing, with its lower end abutting against the upper right side of the moving contact bridge 6. The housing contains a first shaft 9 and a second shaft 10. The middle portion of the moving contact bridge 6 is sleeved on the first shaft 9. The elastic element 8 is a tension spring, with its upper end hooked onto the left side of the moving contact bridge 6 and its lower end hooked onto the second shaft 10. Electromagnet 1 is located on the right side of the housing. The right end of the moving contact bridge 6 has a downwardly extending extension 11. The moving iron core 7 of the electromagnet 1 can abut against the extension 11. The left end of the housing has an exhaust port 12. The left side of the housing has an arc-extinguishing cover 13 that covers the front and rear sides of the moving contact 4 and the stationary contact 3 and is aligned with the exhaust port 12. The arc-extinguishing cover 13 has several arc-extinguishing grid plates 14 inside, and a magnetic guide plate 15 is provided on the arc-extinguishing cover 13. The housing has a curtain 16 that blocks the exhaust port 12. The curtain 16 is made of flexible material. When a short circuit occurs, the electric arc impacts the curtain 16, causing it to deform. The electric arc is then discharged from the exhaust port 12. The housing includes a first housing 17 and a second housing 18 arranged opposite to each other. The first housing 17 and the second housing 18 have multiple mutually aligned mounting holes 19. Bolts pass through the mounting holes 19, and nuts are screwed to the other end of the bolts.

[0019] In this embodiment, the electromagnet 1, contact support 2, stationary contact 3, stationary contact piece 5, moving contact 4, moving contact bridge 6, and contact support 2 are all pre-installed in the housing to form a separate contact system. Finally, they are inserted into the base of the switchgear. This eliminates the need to install the contact structures one by one in the limited space of the base, making the assembly process more convenient. When a short circuit occurs in the electrical switch, the electromagnet 1 is energized. At this time, the moving iron core 7 moves inward to push the contact bridge 6, causing the moving contact 4 and the stationary contact 3 to disconnect. After the fault is cleared, the electromagnet 1 is de-energized. The energized iron core 7 moves outward to reset under the action of the spring, and the moving contact bridge 6 rotates counterclockwise under the action of the tension spring, causing the moving contact 4 to abut against the stationary contact 3.

[0020] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A contact system, comprising a housing and an electromagnet disposed within the housing, a contact support, and mutually aligned stationary and moving contacts, characterized in that: The stationary contact is disposed on the stationary contact plate, which passes through the left side of the housing. The moving contact is disposed at the lower left end of the moving contact bridge. The middle part of the moving contact bridge is hinged inside the housing, and the moving contact bridge is equipped with an elastic element that causes it to rotate counterclockwise. The moving iron core of the electromagnet can abut against the right end of the moving contact bridge. The contact support passes through the upper side of the housing, and the lower end of the contact support abuts against the upper right side of the moving contact bridge.

2. The contact system according to claim 1, characterized in that: The housing contains a first shaft and a second shaft. The middle part of the movable contact bridge is sleeved on the first shaft. The elastic element is a tension spring, with its upper end hooked on the left side of the movable contact bridge and its lower end hooked on the second shaft.

3. A contact system according to claim 1 or 2, characterized in that: The electromagnet is located on the right side of the housing, and the right end of the moving contact bridge has a downwardly extending extension, on which the moving iron core of the electromagnet can rest.

4. A contact system according to claim 3, characterized in that: The left end of the housing is provided with an exhaust port, and the left side of the housing is provided with an arc-extinguishing cover that covers the front and rear sides of the moving contact and the stationary contact and is aligned with the exhaust port. The arc-extinguishing cover is provided with a number of arc-extinguishing grid plates, and a magnetic plate is provided on the arc-extinguishing cover.

5. A contact system according to claim 3, characterized in that: The housing is equipped with a curtain that blocks the exhaust port, and the curtain is made of a flexible material.

6. A contact system according to claim 4 or 5, characterized in that: The housing includes a first housing and a second housing arranged opposite to each other. The first housing and the second housing are provided with a plurality of mutually aligned mounting holes. Bolts are inserted through the mounting holes, and nuts are screwed to the other end of the bolts.

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