Composite contact capable of circuit protection

Abstract

The utility model discloses a composite contact capable of circuit protection, which comprises a shell and a bottom plate arranged at the bottom of the shell, a circuit connecting end is arranged on the shell, a contact end is fixedly arranged in the shell, a mounting groove penetrating through the shell is arranged on the upper side of the contact end, and the circuit connecting end is fixedly arranged in the mounting groove. A mounting groove is formed in the shell, a contact in contact with the contact end is in threaded connection with the interior of the mounting groove, a protection mechanism used for circuit protection is arranged between the circuit connecting end and the contact end and comprises an iron core located in the shell and fixedly connected to the bottom plate, a circuit is wound on the iron core, and the iron core is fixedly connected with the circuit connecting end. One end of the circuit is connected with the circuit connecting end through a first wire, the other end of the circuit is connected with a second wire, and the circuit is controlled to be disconnected according to the principle that the current is large and the magnetic force of an iron core is large during short circuit, so that the aim of short circuit protection is fulfilled.

Description

Technical Field

[0001] This utility model relates to the field of composite contacts, specifically to a composite contact capable of circuit protection. Background Technology

[0002] Commercially available circuit switches often only control the opening and closing of circuits and cannot automatically disconnect to protect the circuit in case of overload. Overload current causes the temperature in the circuit to rise, which can easily lead to fire and pose a safety hazard. In order to improve the electrical safety of complex circuits, this utility model proposes a composite contact that can protect the circuit. Utility Model Content

[0003] In order to overcome the defects in the prior art, this utility model provides a composite contact that can protect the circuit. It controls the circuit to disconnect the circuit by using the principle that the current is large and the magnetic force of the iron core is large during a short circuit, thereby achieving the purpose of short circuit protection.

[0004] Technical solution

[0005] A composite contact capable of circuit protection includes a housing and a base plate disposed at the bottom of the housing. The housing is provided with a line connection terminal, and a contact terminal is fixed inside the housing. A mounting groove penetrating the housing is provided on the upper side of the contact terminal. A contact that contacts the contact terminal is threadedly connected inside the mounting groove. A protection mechanism for circuit protection is provided between the line connection terminal and the contact terminal.

[0006] Furthermore, the protective mechanism includes an iron core located inside the housing and fixedly connected to the base plate. A wire is wound around the iron core, one end of which is connected to the wire connection end via a first wire, and the other end of which is connected to a second wire.

[0007] Furthermore, a partition plate fixed inside the outer shell is provided on the upper side of the iron core, and a control rod located on the upper side of the iron core passes through the middle of the partition plate. The upper end of the control rod is attracted and fixed to a permanent magnet, and the permanent magnet is fixed to the inner wall of the outer shell. A compression spring is fixedly connected between the lower end of the control rod and the lower surface of the partition plate.

[0008] Furthermore, a conductive sheet that can contact the contact end is connected to one side of the control lever, and the other end of the second wire is connected to the conductive sheet.

[0009] Furthermore, a connecting piece is fixedly connected to the other side of the control lever, and an indicator rod that penetrates and extends through the housing is fixedly connected to the connecting piece. A transparent cover fixed to the housing is provided at the upper end of the indicator rod.

[0010] Furthermore, the contact point is provided with an external thread, and the interior of the mounting groove is provided with an internal thread that can be threadedly connected to the external thread.

[0011] Furthermore, the contact point is provided with a contact head, and the end of the contact point away from the contact head is provided with a connecting part that can be inserted into the contact end and is always in contact with the contact end.

[0012] Beneficial effects

[0013] Compared with the prior art, this utility model has the following advantages: by controlling the circuit to disconnect the circuit based on the principle that the current is large and the magnetic force of the iron core is large during a short circuit, the purpose of short circuit protection is achieved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a composite contact capable of circuit protection according to the present invention.

[0015] Attached icon number

[0016] 1. Base plate; 2. Circuit connection end; 3. Second wire; 4. Partition plate; 5. Contact end; 6. Connection part; 7. Mounting groove; 8. Contact; 9. Conductive sheet; 10. Permanent magnet; 11. Transparent cover; 12. Indicator rod; 13. Connecting piece; 14. Control rod; 15. Compression spring; 16. Outer shell; 17. Circuit; 18. Iron core; 19. First wire; 20. Detailed Implementation

[0017] To better illustrate the content of this utility model, the following description is provided in conjunction with the accompanying drawings and embodiments:

[0018] have Figure 1 As shown, this utility model discloses a composite contact capable of circuit protection, including a housing 17 and a base plate 1 disposed at the bottom of the housing 17. A line connection end 2 is disposed on the housing 17, and a contact end 5 is fixedly disposed inside the housing 17. A mounting groove 7 penetrating the housing 17 is disposed on the upper side of the contact end 5. A contact 9 that contacts the contact end 5 is threadedly connected inside the mounting groove 7. A protection mechanism 900 for circuit protection is disposed between the line connection end 2 and the contact end 5.

[0019] Furthermore, the protection mechanism 900 includes an iron core 19 located inside the outer casing 17 and fixedly connected to the base plate 1. A wire 18 is wound around the iron core 19. One end of the wire 18 is connected to the wire connection terminal 2 via a first wire 20, and the other end of the wire 18 is connected to a second wire 3.

[0020] Furthermore, a partition 4 is provided on the upper side of the iron core 19 and fixed inside the outer shell 17. A control rod 15 located on the upper side of the iron core 19 passes through the middle of the partition 4. The upper end of the control rod 15 is attracted and fixed to the permanent magnet 11. The permanent magnet 11 is fixed to the inner wall of the outer shell 17. A compression spring 16 is fixedly connected between the lower end of the control rod 15 and the lower surface of the partition 4.

[0021] Furthermore, a conductive sheet 10 that can contact the contact end 5 is connected to one side of the control rod 15, and the other end of the second wire 3 is connected to the conductive sheet 10.

[0022] Furthermore, a connecting piece 14 is fixedly connected to the other side of the control lever 15. An indicator rod 13 that penetrates and extends through the outer casing 17 is fixedly connected to the connecting piece 14. A transparent cover 12 fixed to the outer casing 17 is provided at the upper end of the indicator rod 13.

[0023] Furthermore, the contact 9 is provided with an external thread (not shown), and the mounting groove 7 is provided with an internal thread (not shown) that can be threadedly connected to the external thread.

[0024] Furthermore, the contact 9 is provided with a contact 8, and the end of the contact 9 away from the contact 8 is provided with a connecting part 6 that can be inserted into the contact end 5 and is always in contact with the contact end 5.

[0025] Specifically, during installation, screw the contact 9 into the mounting groove 7 so that the connecting part 6 is inserted into the upper part of the contact end 5.

[0026] In the initial state, the control rod 15 is located at the top under the attraction of the permanent magnet 11, and the permanent magnet 11 is in contact with the control rod 15. At this time, the connecting piece 14 is located at the top, the upper end of the indicator rod 13 penetrates the outer shell 17 and can be seen outside the transparent cover 12. At the same time, the conductive piece 10 is located at the top and is in contact with the contact end 5 and can be energized.

[0027] At this time, the compression spring 16 is compressed and tends to move the control rod 15 downward, but it remains fixed due to the attraction of the permanent magnet 11.

[0028] When the line connection terminal 2 and contact 9 are connected to the circuit, the line 18 is energized and the iron core 19 becomes magnetic. At this time, the current in the circuit is normal, and the magnetic force of the iron core 19 is insufficient to overcome the attraction of the permanent magnet 11 to the control rod 15 and drive the control rod 15 to move down.

[0029] When the circuit is short-circuited, the current increases sharply. At this time, the magnetic force of the iron core 19 increases, and the control rod 15 moves down and separates from the permanent magnet 11 under the attraction. At this time, the conductive sheet 10 moves down and separates from the contact end 5. The circuit is then disconnected, and circuit protection is achieved.

[0030] When the circuit is disconnected, the iron core 19 loses its magnetism and is located on the lower side under the action of the compression spring 16. The permanent magnet 11 is far away from the control rod 15, and its magnetic force is greatly reduced, so it is not enough to attract the control rod 15 to move upward.

[0031] At the same time, the indicator rod 13 moves down under the action of the connecting piece 14, and the indicator rod 13 can no longer be seen from the transparent cover 12, indicating that the circuit protection mechanism has been triggered.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the technical solutions of this utility model have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A composite contact capable of circuit protection, characterized by: The utility model provides a circuit protection mechanism, including shell (17) and the bottom plate (1) of setting in the bottom of shell (17), be provided with circuit connection end (2) on shell (17), the inside fixed contact end (5) of shell (17), the upper side of contact end (5) is provided with the installation slot (7) of penetrating shell (17), the inside screw thread connection of installation slot (7) is contacted with the contact (9) of contact end (5), and the protection mechanism (900) for circuit protection is arranged between circuit connection end (2) and contact end (5).

2. A composite contact capable of circuit protection according to claim 1, wherein: The protection mechanism (900) includes an iron core (19) located inside the shell (17) and fixedly connected to the bottom plate (1), and a wire (18) wound around the iron core (19). One end of the wire (18) is connected to the circuit connection end (2) through a first electric wire (20), and the other end of the wire (18) is connected to a second electric wire (3).

3. A composite contact capable of circuit protection according to claim 2, wherein: The upper side of the iron core (19) is provided with a partition plate (4) fixedly arranged inside the shell (17). A control rod (15) penetrates the upper side of the iron core (19) and is arranged in the middle of the partition plate (4). The upper end of the control rod (15) is adsorbed and fixed to a permanent magnet (11), and the permanent magnet (11) is fixedly arranged on the inner wall of the shell (17). A compression spring (16) is fixedly connected between the lower end of the control rod (15) and the lower surface of the partition plate (4).

4. A composite contact capable of circuit protection according to claim 3, wherein: One side of the control rod (15) is connected to a conductive sheet (10) capable of contacting the contact end (5), and the other end of the second electric wire (3) is connected to the conductive sheet (10).

5. A composite contact capable of circuit protection according to claim 4, wherein: The other side of the control rod (15) is also fixedly connected to a connecting sheet (14), and the connecting sheet (14) is fixedly connected to a indicating rod (13) penetrating and extending out of the shell (17). The upper end of the indicating rod (13) is provided with a transparent cover (12) fixedly arranged on the shell (17).

6. A composite contact capable of circuit protection according to claim 5, wherein: The contact (9) is provided with external threads, and the inside of the installation slot (7) is provided with internal threads capable of being threadedly connected with the external threads.

7. A composite contact capable of circuit protection according to claim 6, wherein: The contact (9) is provided with a contact head (8), and the end of the contact (9) away from the contact head (8) is provided with a connecting portion (6) capable of being inserted into the contact end (5) and always contacting the contact end (5).

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