Short-circuit protection structure of control box

Abstract

The utility model provides a control box short-circuit protection structure, which relates to the technical field of controllers and comprises a controller, a protector fixed on the inner wall of the controller, a telescopic cylinder detachably mounted in the protector, a magnetic coil inlaid on the outer wall of the telescopic cylinder, a circuit board fixed on the side end face of the magnetic coil, and a push rod slidably mounted in the telescopic cylinder. A rotating shaft is fixed to the inner wall of the controller, the outer surface of the rotating shaft is rotationally connected with a contactor, a rotating spring is fixed to the back face of the contactor, the other end of the rotating spring is fixedly connected with the inner wall of the controller, a contact baffle is fixed to the inner wall of the controller, and an electric shock piece is fixed to the left end face of the contact baffle. The magnetic coil is installed on the telescopic cylinder, when the circuit is short-circuited and the current is too large, the pushing rod retreats due to magnetic induction attraction force, and the circuit is disconnected, so that the circuit is protected, and meanwhile, due to the fact that too many screw products are not adopted for connection, maintenance personnel are protected from mistakenly touching and accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of controllers, in particular to a control box short-circuit protection structure. Background Art

[0002] The control box uses the house as a platform and utilizes integrated wiring technology, network communication technology, security technology, automatic control technology, and audio and video technology to integrate facilities related to home life, build an efficient management system for residential facilities and family schedule affairs, improve home safety, convenience, comfort, and artistry, and achieve an environmentally friendly and energy-saving living environment; smart homes use the Internet of Things technology to connect various devices in the home (such as audio and video equipment, lighting systems, curtain control, air conditioning control, security systems, digital cinema systems, audio and video servers, video cabinet systems, network appliances, etc.), and provide a variety of functions and means such as home appliance control, lighting control, telephone remote control, indoor and outdoor remote control, burglar alarm, environmental monitoring, HVAC control, infrared forwarding, and programmable timing control.

[0003] The existing control box short-circuit protection structure automatically short-circuits according to abnormal circumstances. When the wire is short-circuited, the circuit breaker cannot return to its normal initial state, and the line needs to be repaired. At the same time, it is not ruled out that the short-circuit protection structure itself has a fault. At this time, the short-circuit protection needs to be disassembled and repaired. When the short-circuit protection and the line are repaired, the disassembly and assembly are cumbersome and laborious, and there are many parts that are easy to lose, resulting in inconvenience in disassembly and assembly. The existing short-circuit protection structure is generally fixed in the control box by screws. After long-term use, it will oxidize and rust, and it is easy to sprout during disassembly and assembly, making it difficult to disassemble. In addition, the screws are generally metal products with a small size. When the short-circuit protection is repaired, the line may be touched due to the disassembly of the screws, causing a risk of electric shock, and there are certain safety hazards. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a control box short-circuit protection structure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it includes a controller, a protector is fixed on the inner wall of the controller, characterized in that: a telescopic cylinder is detachably installed inside the protector, a magnetic coil is inlaid on the outer wall of the telescopic cylinder, a circuit board is fixed on the side end face of the magnetic coil, a push rod is slidably installed inside the telescopic cylinder, a rotating shaft is fixed on the inner wall of the controller, a contactor is rotatably connected to the outer surface of the rotating shaft, a rotating spring is fixed on the back of the contactor, the other end of the rotating spring is fixedly connected to the inner wall of the controller, a contact baffle is fixed on the inner wall of the controller, and a shock sheet is fixed on the left end face of the contact baffle. In the prior art, the existing control box short-circuit protection structure automatically short-circuits according to abnormal conditions. When the wire is short-circuited, the circuit breaker cannot restore to the normal initial state, and the line needs to be repaired. At the same time, it is not ruled out that the short-circuit protection structure itself fails. At this time, it is necessary to disassemble and repair the short-circuit protection. When the circuit is inspected and repaired, it is cumbersome and laborious to disassemble and assemble, and there are many parts that are easy to lose, resulting in inconvenience in disassembly and assembly. In addition, the existing short-circuit protection structure is generally fixed in the control box by screws. After long-term use, it will oxidize and rust and easily sprout during disassembly and assembly, resulting in difficulty in disassembly. In addition, the screws are generally metal products with a small volume. When the short-circuit protection is inspected and repaired, the circuit may be touched due to the disassembly of the screws, causing the risk of electric shock. There are certain safety hazards. By adopting a telescopic cylinder installed inside the protection device, a magnetic coil is installed on the telescopic cylinder. When current passes through the magnetic coil, due to the small normal current, the telescopic cylinder pushes the push rod to push the contactor forward, the circuit is connected, and the current passes. When the circuit is short-circuited, the current is too large, causing the push rod to retreat due to the magnetic attraction, and the circuit is disconnected, thereby protecting the circuit and avoiding short circuits caused by contact problems of the protection device itself. At the same time, because not too many screw products are used for connection, maintenance personnel are protected from accidental touches.

[0006] Preferably, a connecting plate is fixed to the front end surface of the contact baffle, a rotating column is fixedly connected to the bottom end surface of the connecting plate, a rotating terminal block is rotatably connected to the surface of the rotating column, a wiring connector is detachably mounted on the upper end surface of the rotating terminal block, a wiring nut is threadedly connected to the surface of the wiring connector, a buffer spring is fixed to the side end surface of the rotating terminal block, and the other end surface of the buffer spring is fixedly connected to the inner wall of the controller. Most of the short-circuit protection devices in the existing control box are integral. When the power cord is subjected to external tension, the wire core inside the wire shrinks under the action of tension because the wire is fastened with screws. Once the tension is too large, the wire core is easily broken, causing a circuit accident. By installing the wiring connector on the rotating terminal block and connecting the rotating terminal block and the control box with a buffer spring, when the connecting wire is subjected to external tension, the buffer spring buffers the tension, thereby realizing that the display screen has a buffering function, avoiding the internal parts from being easily broken by the tension, causing accidents.

[0007] Preferably, a fixing bolt is fixed to the inner wall of the controller, a fixing block is fixed to the inner wall of the controller through the fixing bolt, a cooling fan is fixed to the side end face of the fixing block, screws are threadedly connected to the end faces of both sides of the protector, and heat plates are fixedly connected to the end faces of both sides of the protector through screws. Nowadays, with the increase of the power of the short-circuit protection device, the heat generation increases. If the heat dissipation problem is not solved well, the heat is concentrated in a device with a very small size, which is easy to cause concentrated heating. Moreover, the dense arrangement is not conducive to the flow of air, which makes the temperature inside the device higher and higher. Excessive temperature will bring many problems. If the heat cannot be evacuated in time, the effect of the short-circuit protection device will be affected, and even the internal circuits will be damaged. The utility model adds a cooling fan inside the device to increase the air flow in the device, and the heat generated by the protection device is sent out from the heat sink with the help of air flow, thereby optimizing the heat dissipation of the short-circuit protection device, avoiding the temperature inside the control box from getting higher and higher, causing device aging, reducing the possibility of wire burning, and extending the service life of the device.

[0008] Preferably, a conductive block is installed on the left end face of the contactor, and the conductive block is in contact with the electric contact sheet, thereby achieving uniform current flow and avoiding discharge of the device.

[0009] Preferably, the surfaces of the plurality of wire nuts are sleeved with insulating sheaths, which insulate the device from the outside world, thereby protecting the device from damage due to static electricity generated by the metal material.

[0010] Preferably, the heat sink slots are densely and obliquely distributed, and a certain return-to-city effect is achieved by means of the inclined ventilation holes.

[0011] Preferably, a slot is provided on the back of the protector, and by embedding the heat sink in the slot, the protector can interact more smoothly with the outside air.

[0012] Beneficial Effects

[0013] 1. In the prior art, the short-circuit protection structure of the existing control box automatically short-circuits according to abnormal conditions. When the wire is short-circuited, the circuit breaker cannot return to the normal initial state, and the line needs to be repaired. At the same time, it is not ruled out that the short-circuit protection structure itself fails. At this time, the short-circuit protection needs to be disassembled and repaired. When the short-circuit protection and the line are repaired, the disassembly and assembly are cumbersome and laborious, and many parts are easy to lose, resulting in inconvenience in disassembly and assembly. In addition, the existing short-circuit protection structure is generally fixed in the control box by screws, which will oxidize and rust after long-term use and are easy to sprout during disassembly and assembly, resulting in difficulty in disassembly. In addition, the screws are generally metal products with a small volume, and when the short-circuit protection is repaired, the short-circuit protection is repaired. When removing and installing screws, the circuit may be touched, causing a risk of electric shock, which poses a certain safety hazard. The utility model adopts a telescopic cylinder installed inside the protection device, and a magnetic coil is installed on the telescopic cylinder. When current passes through the magnetic coil, due to the small normal current, the telescopic cylinder pushes the push rod to push the contactor forward, the circuit is connected, and the current passes. When the circuit is short-circuited, the current is too large, causing the push rod to retreat due to the magnetic attraction, and the circuit is disconnected, thereby protecting the circuit and avoiding short-circuit of the circuit due to contact problems of the protection device itself. At the same time, because not too many screw products are used for connection, maintenance personnel are protected from accidental touch and accidents.

[0014] 2. Most of the existing short-circuit protection devices in the control box are integral. When the power cord is subjected to external tension, the wire core inside the wire shrinks under the tension because the wire is fastened with screws. Once the tension is too large, the wire core is easily broken, causing a circuit accident. The utility model installs the connector on a rotating terminal board, and uses a buffer spring to connect the rotating terminal board and the control box. When the connected wire is subjected to external tension, the buffer spring buffers the tension, thereby realizing the buffer function of the display screen, preventing internal parts from being easily broken due to tension, causing accidents.

[0015] 3. In the prior art, nowadays, as the power of the short-circuit protection device increases, the heat generation increases. If the heat dissipation problem is not properly solved, the heat will be concentrated in a very small device, which is easy to cause concentrated heating. Moreover, the dense arrangement is not conducive to the flow of air, which makes the temperature inside the device higher and higher. Excessive temperature will bring many problems. If the heat cannot be evacuated in time, the effect of the short-circuit protection device will be affected, and even cause damage to the internal circuits. The utility model adds a cooling fan inside the device to increase the air flow in the device, and the heat generated by the protection device is sent out from the heat sink with the help of air flow, thereby optimizing the heat dissipation of the short-circuit protection device, avoiding the temperature inside the control box from getting higher and higher, causing device aging, reducing the possibility of wire burning, and extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the short-circuit protection structure of the utility model;

[0017] Figure 2 It is a top view of the three-dimensional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the side heat dissipation air groove structure in the utility model.

[0020] Legend:

[0021] 1. Controller; 2. Protector; 3. Telescopic cylinder; 4. Magnetic coil; 5. Circuit board; 6. Wire connector; 7. Wire nut; 8. Push rod; 9. Rotating shaft; 10. Rotating spring; 11. Contactor; 12. Contact baffle; 13. Electric shock sheet; 14. Connecting plate; 15. Rotating column; 16. Rotating terminal board; 17. Buffer spring; 18. Fixing bolt; 19. Fixing block; 20. Cooling fan; 21. Heat sink; 22. Screw. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0023] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings. Specific embodiment:

[0025] Reference Figure 1-4 A control box short-circuit protection structure includes a controller 1, a protector 2 is fixed to the inner wall of the controller 1, a telescopic cylinder 3 is detachably installed inside the protector 2, a magnetic coil 4 is inlaid and installed on the outer wall of the telescopic cylinder 3, a circuit board 5 is fixed to the side end face of the magnetic coil 4, a push rod 8 is slidably installed inside the telescopic cylinder 3, a rotating shaft 9 is fixed to the inner wall of the controller 1, a contactor 11 is rotatably connected to the outer surface of the rotating shaft 9, a rotating spring 10 is fixed to the back of the contactor 11, and the other end of the rotating spring 10 is fixedly connected to the inner wall of the controller 1, a contact baffle 12 is fixed to the inner wall of the controller 1, a contact sheet 13 is fixed to the left end face of the contact baffle 12, and a conductive block is installed on the left end face of the contactor 11.

[0026] A connecting plate 14 is fixed to the front end face of the contact baffle 12, a rotating column 15 is fixedly connected to the bottom end face of the connecting plate 14, a rotating terminal block 16 is rotatably connected to the surface of the rotating column 15, a wiring connector 6 is detachably installed on the upper end face of the rotating terminal block 16, a wiring nut 7 is threadedly connected to the surface of the wiring connector 6, a buffer spring 17 is fixed to the side end face of the rotating terminal block 16, the other side end face of the buffer spring 17 is fixedly connected to the inner wall of the controller 1, a fixing bolt 18 is fixed to the inner wall of the controller 1, a fixing block 19 is fixed to the inner wall of the controller 1 through the fixing bolt 18, a cooling fan 20 is fixed to the side end face of the fixing block 19, screws 22 are threadedly connected to the end faces on both sides of the protector 2, and heat sinks 21 are fixedly connected to the end faces on both sides of the protector 2 through the screws 22, an insulating sheath is sleeved on the surface of the wiring nut 7, slots of the heat sink 21 are densely and obliquely distributed, and slots are opened on the back of the protector 2.

[0027] In the prior art, the short-circuit protection structure of the existing control box automatically short-circuits according to abnormal conditions. When the wire is short-circuited, the circuit breaker cannot return to the normal initial state, and the line needs to be repaired. At the same time, it is not ruled out that the short-circuit protection structure itself fails. At this time, the short-circuit protection needs to be disassembled and repaired. When the short-circuit protection and the line are repaired, the disassembly and assembly are cumbersome and laborious, and many parts are easy to lose, resulting in inconvenience in disassembly and assembly. In addition, the existing short-circuit protection structure is generally fixed in the control box by screws, which will oxidize and rust after long-term use and are easy to sprout during disassembly and assembly, resulting in difficulty in disassembly. In addition, the screws are generally metal products with a small volume, and when the short-circuit protection is repaired, it may be due to There is a danger of electric shock when touching the circuit when disassembling screws, which poses a certain safety hazard. The utility model adopts a telescopic cylinder 3 installed inside the protection device, and a magnetic coil 4 is installed on the telescopic cylinder 3. When current passes through the magnetic coil 4, due to the small current passing normally, the telescopic cylinder 3 pushes the push rod 8 to push the contactor 11 forward, the circuit is connected, and the current passes. When the circuit is short-circuited, the current is too large, causing the push rod 8 to retreat due to the magnetic attraction, and the circuit is disconnected, thereby protecting the circuit and avoiding short-circuit of the circuit due to contact problems of the protection device itself. At the same time, because not too many screw products are used for connection, maintenance personnel are protected from accidental touch and accidents.

[0028] The working principle of the utility model is as follows: the telescopic cylinder 3 is installed inside the protective device, and the magnetic coil 4 is installed on the telescopic cylinder 3. When current passes through the magnetic coil 4, due to the small normal current, the telescopic cylinder 3 pushes the propulsion rod 8 to push the contactor 11 forward, the circuit is connected, and the current passes. When the circuit is short-circuited, the current is too large, causing the propulsion rod 8 to retreat due to the magnetic attraction, and the circuit is disconnected. The connector 6 is installed on the rotating terminal board 16, and the buffer spring 17 is used to connect the rotating terminal board 16 and the control box. When the connecting wire is subjected to external tension, the buffer spring 17 buffers the tension.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A control box short circuit protection structure, comprising a controller (1), a protector (2) being fixed to the inner wall of the controller (1), characterized in that: A telescopic cylinder (3) is detachably mounted inside the protector (2), a magnetic coil (4) is embedded in the outer wall of the telescopic cylinder (3), a circuit board (5) is fixed to the side end face of the magnetic coil (4), a push rod (8) is slidably mounted inside the telescopic cylinder (3), a rotating shaft (9) is fixed to the inner wall of the controller (1), a contactor (11) is rotatably connected to the outer surface of the rotating shaft (9), a rotating spring (10) is fixed to the back of the contactor (11), the other end of the rotating spring (10) is fixedly connected to the inner wall of the controller (1), a contact baffle (12) is fixed to the inner wall of the controller (1), and a contact sheet (13) is fixed to the left end face of the contact baffle (12).

2. A control box short circuit protection structure according to claim 1, characterized in that: A connecting plate (14) is fixed to the front end surface of the contact baffle (12); a rotating column (15) is fixedly connected to the bottom end surface of the connecting plate (14); a rotating terminal block (16) is rotatably connected to the surface of the rotating terminal block (15); a terminal block (6) is detachably mounted on the upper end surface of the rotating terminal block (16); a terminal nut (7) is threadedly connected to the surface of the terminal block (6); a buffer spring (17) is fixed to the side end surface of the rotating terminal block (16); and the other side end surface of the buffer spring (17) is fixedly connected to the inner wall of the controller (1).

3. A control box short circuit protection structure according to claim 1, characterized in that: A fixing bolt (18) is fixed to the inner wall of the controller (1), a fixing block (19) is fixed to the inner wall of the controller (1) via the fixing bolt (18), a heat dissipation fan (20) is fixed to the side end surface of the fixing block (19), both side end surfaces of the protector (2) are threadedly connected with screws (22), and both side end surfaces of the protector (2) are fixedly connected with heat dissipation plates (21) via the screws (22).

4. A control box short circuit protection structure according to claim 1, characterized in that: A conductive block is installed on the left end surface of the contactor (11).

5. A control box short circuit protection structure according to claim 2, characterized in that: The surfaces of the plurality of wiring nuts (7) are sleeved with insulating sheaths.

6. A control box short circuit protection structure according to claim 3, characterized in that: The slots of the heat dissipation plate (21) are densely distributed and inclined.

7. A control box short circuit protection structure according to claim 3, characterized in that: The protector (2) has a slotted hole on its back.

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