Limit switch with variable contact combination

Abstract

The utility model discloses a limit switch with a variable contact combination, which comprises an internal switch box, a movable contact frame in sliding connection is arranged in the internal switch box, and the front end and the rear end of two sides of the movable contact frame are respectively connected with a movable contact; the upper end of the internal switch box is connected with a contact terminal cover, the contact terminal cover is provided with four installation positions, and each installation position is connected with a static contact terminal. And the front end of the movable contact frame is connected with a switching driving assembly. One end of the movable contact frame is connected with a contact spring which is used for pushing the movable contact to be in contact with the static contact terminal; and the other end is connected with a reset spring for pushing the movable contact frame to reset. The switching driving assembly comprises a magnetic induction sheet, and the magnetic induction sheet is connected to the front end of the movable contact frame. The utility model aims to overcome the defects in the prior art, provides the limit switch with the variable contact combination, expands the use scene of the limit switch, and can meet the requirements of customers.

Description

Technical Field

[0001] This utility model relates to a limit switch with a variable contact combination. Background Technology

[0002] Electrical switches are core electrical components that control the on / off state of circuits. They connect or disconnect current through the contact and separation of contacts and are widely used in power, construction, and industrial fields.

[0003] Switches can be categorized by function into control switches (such as wall lighting switches), protection switches (such as circuit breakers and fuses), and disconnect switches; and by structure into knife switches, air switches, touch switches, and smart switches. Their core principle is based on the mechanical action of conductive contacts: when closed, the contacts make contact to form a circuit; when open, the contacts separate to cut off the current. In high-current scenarios, an arc-extinguishing device is also required to eliminate the electric arc generated during disconnection.

[0004] Common household circuit breakers combine control with overload and short-circuit protection; industrial contactors can remotely control high-current equipment; and disconnect switches are used in high-voltage power grids to achieve circuit isolation. With the development of smart technology, modern switches integrate sensors and wireless communication, supporting remote control and status monitoring, becoming key nodes in smart grids and smart homes, and playing an important role in safe electricity use and energy efficiency management.

[0005] Existing limit switches have fixed structures and forms, and can only perform simple open or close functions. When the application scenario changes and the application form needs to be adjusted, the switch needs to be customized and manufactured again. Existing limit switches cannot achieve different forms of application through structural fine-tuning. Therefore, a limit switch with variable contact combination is proposed to address the above problems. Utility Model Content

[0006] The purpose of this utility model is to overcome the existing defects and provide a limit switch with a variable contact combination, which expands the application scenarios of limit switches and can meet customer needs.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a limit switch with variable contact combination, including an internal switch box, wherein a slidingly connected moving contact frame is provided inside the internal switch box, and moving contacts are respectively connected to the front and rear ends of both sides of the moving contact frame;

[0008] The upper end of the internal switch box is connected to a contact terminal cover, and the contact terminal cover is provided with four mounting positions, each of which is connected to a stationary contact terminal.

[0009] The front end of the moving contact frame is connected to a switching drive component.

[0010] Preferably, one end of the moving contact frame is connected to a contact spring for pushing the moving contact into contact with the stationary contact terminal; the other end is connected to a reset spring for pushing the moving contact frame to reset.

[0011] Preferably, the switching drive assembly includes a magnetic plate connected to the front end of the moving contact frame, a magnetic shielding plate connected to the side of the magnetic plate away from the moving contact frame, and a rubber cup connected to the other side of the magnetic shielding plate via two permanent magnets. The other end of the rubber cup is connected to a pressure rod.

[0012] Preferably, both the magnetic shielding sheet and the magnetic attracting sheet have through holes in their middle portions, and the pressure rod pushes the moving contact frame through the through holes.

[0013] Preferably, each of the stationary contact terminals is connected to a wiring screw for wiring.

[0014] Preferably, the internal switch box is located inside the housing, a cover is connected to the housing, and a sealing gasket is provided between the cover and the housing.

[0015] Preferably, an electromagnet is provided inside the housing.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: This variable contact combination limit switch, by changing only two parts (contact terminal cover and moving contact frame), satisfies the production and realization of limit switches with different contact combinations. The remaining parts can be shared, greatly saving on manufacturing and inventory costs. It also greatly facilitates production line workers in learning and mastering the assembly of variable contact combination limit switches. This expands the application scenarios of limit switches and can meet customer needs. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 An exploded view of the limit switch with variable contact combination of this utility model;

[0019] Figure 2 This is a schematic diagram of the normally open state of this utility model (state one);

[0020] Figure 3 This is a schematic diagram of the normally closed state of this utility model;

[0021] Figure 4 This is a schematic diagram of the normally open state of this utility model (state two);

[0022] Figure 5This is a schematic diagram of the normally closed state of the present invention, state two.

[0023] In the diagram: 1. Housing cover; 2. Sealing gasket; 3. Wiring screw; 4. Stationary contact terminal; 5. Contact terminal cover; 6. Pressure rod; 7. Leather cup; 8. Permanent magnet; 9. Magnetic shield; 10. Magnetic attracting plate; 11. Contact spring; 12. Moving contact; 13. Moving contact bracket; 14. Return spring; 15. Internal switch box; 16. Electromagnet; 17. Housing. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 As shown, a limit switch with variable contact combination includes an internal switch box 15. Inside the internal switch box 15, a slidingly connected moving contact frame 13 is provided. Moving contacts 12 are respectively connected to the front and rear ends of both sides of the moving contact frame 13. The upper end of the internal switch box 15 is connected to a contact terminal cover 5. The contact terminal cover 5 is provided with four mounting positions, and a stationary contact terminal 4 is connected to each mounting position. A wiring screw 3 for wiring is connected to each stationary contact terminal 4.

[0026] Specifically, one end of the moving contact frame 13 is connected to a contact spring 11 for pushing the moving contact 12 into contact with the stationary contact terminal 4; the other end is connected to a reset spring 14 for pushing the moving contact frame 13 to reset.

[0027] Specifically, the front end of the moving contact frame 13 is connected to a switching drive assembly. The switching drive assembly includes a magnetic guide plate 10, which is connected to the front end of the moving contact frame 13. A magnetic shielding plate 9 is connected to the side of the magnetic guide plate 10 facing away from the moving contact frame 13. The other side of the magnetic shielding plate 9 is connected to a rubber cup 7 via two permanent magnets 8. The other end of the rubber cup 7 is connected to a pressure rod 6. Both the magnetic shielding plate 9 and the magnetic guide plate 10 have through holes in their middle sections, and the pressure rod 6 pushes the moving contact frame 13 through these through holes.

[0028] Specifically, the internal switch box 15 is located inside the housing 17, and the housing cover 1 is connected to the housing 17. A sealing gasket 2 is provided between the housing cover 1 and the housing 17. An electromagnet 16 is installed inside the housing 17.

[0029] Specifically, the housing 17 and the contact terminal cover 5 form a closed space. Four stationary contact terminals 4 are inserted into the positioning holes of the contact terminal cover 5 to fix their positions. The moving contact 12 is mounted on the moving contact bracket 13 and changes position as the moving contact bracket 13 moves. When the moving contact 12 contacts the stationary contact terminal 4, the circuit is connected; when the moving contact 12 separates from the stationary contact terminal 4, the circuit is disconnected.

[0030] like Figure 2 , 3 As shown, four moving contacts 12 are located between four stationary contact terminals 4. When the moving contacts 12 are in contact with the two front stationary contact terminals 4, they are normally open; when they are in contact with the two rear stationary contact terminals 4, they are normally closed. In use, the contact spring 11 continuously pushes the moving contact frame 13 forward, causing the two front moving contacts 12 to contact the front stationary contact terminals 4, thus completing the circuit (normally open state). Pressing the pressure rod 6 causes it to pass through the through hole and push the moving contact frame 13 backward, causing the two rear moving contacts 12 to contact the two rear stationary contact terminals 4 (normally closed state). This allows for the normal open and normal closed states of a circuit.

[0031] like Figure 4 , 5 As shown, two moving contacts 12 are located between four stationary contact terminals 4, and the other two are located on the outside. When the moving contact frame 13 moves forward, it can make the four moving contacts 12 contact the four stationary contact terminals 4 to realize the normally open circuit of the two sets of circuits. When the moving contact frame 13 moves backward, it realizes the normally closed circuit of the two sets of circuits.

[0032] This variable contact combination limit switch, by changing only two parts (contact terminal cover 5 and moving contact bracket 12), satisfies the production and realization of limit switches with different contact combinations. The remaining parts can be shared, greatly saving on manufacturing and inventory costs. It also greatly facilitates production line workers in learning and mastering the assembly of variable contact combination limit switches. This expands the application scenarios of limit switches and can meet customer needs.

[0033] The limit switch of this variable contact combination uses interchangeable inserts and a common mold for manufacturing the contact terminal cover 5 and the moving contact frame 12, which saves additional mold investment, maximizes the use of existing production resources, and thus reduces production costs.

[0034] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A limit switch with variable contact combination, characterized in that, It includes an internal switch box (15), and a slidingly connected moving contact frame (13) is provided inside the internal switch box (15). Moving contacts (12) are respectively connected to the front and rear ends of both sides of the moving contact frame (13). The upper end of the internal switch box (15) is connected to the contact terminal cover (5), and the contact terminal cover (5) is provided with four mounting positions, each of which is connected to a stationary contact terminal (4). The front end of the moving contact frame (13) is connected to the switching drive component.

2. The limit switch with variable contact combination according to claim 1, characterized in that, One end of the moving contact frame (13) is connected to a contact spring (11) for pushing the moving contact (12) into contact with the stationary contact terminal (4); the other end is connected to a reset spring (14) for pushing the moving contact frame (13) to reset.

3. The limit switch with variable contact combination according to claim 1, characterized in that, The switching drive assembly includes a magnetic plate (10) connected to the front end of the moving contact frame (13). The magnetic plate (10) is connected to a magnetic shield (9) on the side away from the moving contact frame (13). The other side of the magnetic shield (9) is connected to a cup (7) via two permanent magnets (8). The other end of the cup (7) is connected to a pressure rod (6).

4. The limit switch with variable contact combination according to claim 3, characterized in that, Both the magnetic shielding sheet (9) and the magnetic attracting sheet (10) have through holes in their middle parts, and the pressure rod (6) pushes the moving contact frame (13) through the through holes.

5. The limit switch with variable contact combination according to claim 1, characterized in that, Each of the stationary contact terminals (4) is connected to a wiring screw (3) for wiring.

6. The limit switch with variable contact combination according to claim 1, characterized in that, The internal switch box (15) is located inside the housing (17), and a cover (1) is connected to the housing (17). A sealing gasket (2) is provided between the cover (1) and the housing (17).

7. The limit switch with variable contact combination according to claim 6, characterized in that, An electromagnet (16) is installed inside the housing (17).

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