A switching power supply with wiring protection

Abstract

This utility model discloses a switching power supply with wiring protection, belonging to the category of switching power supplies with wiring protection. It includes a housing for protecting internal components, a switch button mounted on one side of the housing, two symmetrically mounted horizontal plates for providing support on the other side of the housing, a protective shell for mounting electronic components mounted on the side of the housing, and a central partition for providing limiting force fixedly mounted on the side of the protective shell. A limiting disk for limiting rotational displacement is rotatably connected inside the central partition, and opposing threaded posts for providing opposing movement force are connected to both sides of the limiting disk. This switching power supply eliminates cable loose connections at the source, reduces overheating and arc leakage problems caused by loose connections, ensures stable power supply operation, reduces maintenance costs due to cable failures, extends power supply life, and improves adaptability in special scenarios such as industrial vibration and outdoor environments, breaking application limitations.

Description

Technical Field

[0001] This utility model relates to switching power supplies with wiring protection, and more particularly to a switching power supply with wiring protection. Background Technology

[0002] Switching power supplies, as highly efficient power conversion devices, are widely used in electronic equipment, industrial control, communication equipment, and many other fields. Wiring is a crucial aspect of their operation; correct and stable wiring directly affects the normal operation of the power supply and the safety of the equipment. Weak cable locking capabilities can easily lead to loose connections, overheating, arcing, and leakage, disrupting operational stability, increasing maintenance costs, shortening lifespan, and reducing adaptability to special scenarios, thus limiting applications.

[0003] A search revealed Chinese patent document (authorization announcement number CN221651842U), which discloses a switching power supply with wiring protection, relating to the field of switching power supply technology. This switching power supply with wiring protection includes a housing, a circuit board disposed inside the housing, and terminals disposed at one end of the housing. This invention provides the advantage of moisture and dust protection at the connection point between the connecting wire and the terminal, preventing short circuits. It addresses the problem that the connection point between the connecting wire and the terminal is prone to moisture and dust accumulation, which can lead to poor electrical contact and short circuits. While this device can meet basic usage requirements, its weak cable locking capability easily leads to loose connections, overheating, arcing, and leakage, disrupting stable operation, increasing maintenance costs, shortening lifespan, and weakening adaptability to special scenarios, thus limiting its application. Utility Model Content

[0004] The purpose of this invention is to provide a switching power supply with wiring protection to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a switching power supply with wiring protection, comprising a housing for protecting internal components, a switch button installed on one side of the housing, and two horizontal plates symmetrically installed on the other side of the housing for providing support. The outer casing has a protective shell for mounting electronic components installed on its side. A middle partition for providing a limiting mechanism is fixedly installed on the side of the protective shell. A limiting disk for limiting rotational displacement is rotatably connected inside the middle partition. Opposing threaded columns for providing opposing moving forces are connected to both sides of the limiting disk. Two movable frames are rotatably connected to the outer periphery of the opposing threaded columns. The surfaces of the two movable frames are provided with threaded grooves for engaging with the opposing threaded columns. Hollow columns are installed on the sides of each movable frame. The two hollow columns are symmetrically arranged on both sides of the middle partition.

[0006] Preferably, the hollow column has a circular groove inside for limiting the direction of movement, and a spring for providing compressive force is connected inside the circular groove.

[0007] Preferably, the end of the spring is connected to a movable disk, the movable disk is slidably disposed inside the circular groove, the side of the movable disk away from the spring is connected to a connecting post, and the end of the connecting post away from the movable disk is equipped with a movable locking clamp for compression and fixation.

[0008] Preferably, the protective shell has a terminal block for external connection installed on its side, a cable for power supply connected to the side of the terminal block, and a locking post for locking the cable installed on the top of the terminal block.

[0009] Preferably, both sides of the partition plate are equipped with a fixing clamp for engaging with the movable locking clamp to lock the cable.

[0010] Preferably, a guide post for limiting the movement direction of the moving frame is fixedly installed between the two cross plates, and the guide post completely penetrates the interior of the middle partition and the moving frame.

[0011] Preferably, the surface of the horizontal plate is provided with a limiting hole for the rotation of the opposing threaded column, and a cross nut for controlling the position of the moving frame by rotating the opposing threaded column is installed at one end of the opposing threaded column.

[0012] Compared with the prior art, the technical effects and advantages of this utility model are as follows: This switching power supply with wiring protection utilizes a dual locking structure comprised of a terminal block, locking pin, movable locking clamp, fixed locking clamp, and spring, combined with an elastic buffer design, to effectively address the issue of weak cable locking capability. First, during wiring, the cable is initially secured in the terminal block by rotating the locking pin. Then, rotating the Phillips head nut rotates the opposing threaded pin, causing the movable bracket to move along the guide post, clamping the movable and fixed locking clamps from both sides of the cable. Simultaneously, the spring provides continuous elastic clamping force to the movable locking clamp via the movable disc and connecting post, preventing cable loosening even under vibration or other special conditions. This structure eliminates cable loosening at its source, reducing overheating and arcing issues caused by loose connections, ensuring stable power supply operation, lowering maintenance costs due to cable failures, extending power supply lifespan, and improving adaptability to special scenarios such as industrial vibration and outdoor environments, breaking application limitations.

[0013] This switching power supply with wiring protection benefits significantly from its guide and limit structure, composed of guide posts and a limiting plate, and its modular protective structure formed by the outer casing and protective shell. The guide posts penetrate the central partition and the movable frame, ensuring that the movable frame always moves in a straight line during adjustment, preventing misalignment between the movable and fixed locking clamps, and making cable clamping operations more precise and convenient. The limiting plate restricts the axial displacement of opposing threaded posts, preventing them from shifting during rotation and improving adjustment stability. Simultaneously, the outer casing protects the internal components from damage caused by external impacts and dust. The protective shell specifically protects wiring-related components, isolating the wiring area from internal electronic components, reducing interference to electronic components during cable wiring, and preventing electronic component failures from affecting wiring safety. Overall, this improves the power supply's operational convenience and component protection. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the internal structure of this utility model; Figure 4 This utility model Figure 2 Enlarged view of point A in the middle; Figure 5 This utility model Figure 3 Enlarged view of point B in the middle.

[0016] Explanation of reference numerals in the attached figures: In the diagram: 1. Outer shell; 101. Switch button; 102. Protective shell; 103. Horizontal plate; 104. Middle partition plate; 105. Limiting plate; 106. Opposing threaded post; 107. Cross nut; 108. Terminal block; 109. Cable; 110. Locking post; 111. Limiting hole; 2. Moving frame; 201. Threaded groove; 202. Hollow post; 203. Circular groove; 204. Spring; 205. Moving plate; 206. Connecting post; 207. Movable locking clamp; 3. Fixed locking clamp; 301. Guide post. Detailed Implementation

[0017] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0018] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0019] like Figures 1 to 5 The switch power supply shown includes a housing 1 for protecting internal components. A switch button 101 is installed on one side of the housing 1, and two horizontal plates 103 for providing support are symmetrically installed on the other side of the housing 1. A protective shell 102 for mounting electronic components is installed on the side of the outer casing 1. A middle partition 104 for providing a limiting position is fixedly installed on the side of the protective shell 102. A limiting disk 105 for limiting rotational displacement is rotatably connected inside the middle partition 104. Opposing threaded posts 106 for providing opposing movement force are connected to both sides of the limiting disk 105. Two movable frames 2 are rotatably connected to the outer periphery of the opposing threaded posts 106. The surfaces of the two movable frames 2 are provided with threaded grooves 201 for engaging with the opposing threaded posts 106. By rotating the cross nut 107 at one end of the opposing threaded post 106, the operator drives the opposing threaded post 106 to rotate within the limiting disk 105 inside the middle partition 104 (fixed to the side of the protective shell 102). The limiting disk 105 is rotatably connected to the opposing threaded post 106, which can limit the opposing threaded movement. The axial displacement of the column 106 is only allowed to rotate around its own axis. Since the threads on the outer circumference of the opposing threaded column 106 are designed for bidirectional movement and engage with the threaded grooves 201 on the surfaces of the two movable frames 2, when the opposing threaded column 106 rotates, the two movable frames 2 will move in opposite directions along the guide column 301 (fixed between the two horizontal plates 103, completely penetrating the partition plate 104 and the movable frame 2). If it is necessary to clamp the cable, rotate the cross nut 107 to move the two movable frames 2 closer to the partition plate 104; if it is necessary to disassemble the cable, rotate the cross nut 107 in the opposite direction to move the movable frame 2 away from the partition plate 104. The guide column 301 ensures that the movable frame 2 always moves in a straight line to avoid offset and clamping misalignment. Hollow columns 202 are installed on the sides of the movable frames 2, and the two hollow columns 202 are symmetrically arranged on both sides of the partition plate 104.

[0020] The hollow column 202 has a circular groove 203 inside to limit the direction of movement. A spring 204 for providing compressive force is connected inside the circular groove 203. A movable disk 205 is connected to the end of the spring 204 and is slidably disposed inside the circular groove 203. A connecting column 206 is connected to the side of the movable disk 205 away from the spring 204. A movable locking clip 207 for compression and fixation is installed at the end of the connecting column 206 away from the movable disk 205. When the two movable frames 2 approach the partition 104, the hollow columns 202 on the sides of the movable frames 2 (symmetrically arranged on both sides of the partition 104) move synchronously with the movable frames 2 until the movable locking clips 207 at the ends of the hollow columns 202 are close to both sides of the cable 109. Then, the cross nut 107 is rotated to lock the movable column 202. The clamp 207 is subjected to the reaction force of the cable 109, which pushes the connecting post 206 connected to it to move into the circular groove 203 inside the hollow post 202. The connecting post 206 drives the moving disk 205 (slidably set in the circular groove 203) to compress the spring 204 (set in the circular groove 203), so that the spring 204 generates an elastic reaction force. When the movable locking clamp 207 and the fixed locking clamps 3 on both sides of the partition plate 104 are completely in contact with the cable 109, the rotation of the cross nut 107 stops. At this time, the elastic force of the spring 204 is transmitted to the movable locking clamp 207 through the moving disk 205 and the connecting post 206, so that the movable locking clamp 207 and the fixed locking clamp 3 form a counter clamping force, tightly clamping the cable 109 between the two, and preventing the cable 109 from being displaced due to vibration and pulling.

[0021] The protective housing 102 has a terminal block 108 for external connection on its side. A power cable 109 is connected to the side of the terminal block 108. A locking pin 110 for locking the cable 109 is installed on the top of the terminal block 108. First, one end of the external cable 109 is connected to the terminal block 108 (installed on the side of the protective housing 102). Rotate the locking pin 110 on the top of the terminal block 108. The cable 109 is initially fixed in the terminal block by the threaded clamping force, completing the basic connection for power access and preventing the cable 109 from falling directly from the terminal block. At this time, the housing 1 provides overall protection, protecting the internal protective housing 102 and electronic components. The switch button 101 on one side of the housing 1 is temporarily in the off state to prevent accidental power supply during wiring and ensure operational safety. The two horizontal plates 103 on the other side of the housing 1 provide support for the subsequent adjustment structure, and the limiting holes 111 on their surfaces provide rotation limit for the opposing threaded pins 106.

[0022] Both sides of the partition 104 are equipped with fixed locking clips 3 for engaging with the movable locking clips 207 to lock the cable 109. A guide post 301 for limiting the movement direction of the movable frame 2 is fixedly installed between the two horizontal plates 103. The guide post 301 completely penetrates the interior of the partition 104 and the movable frame 2. The surface of the horizontal plate 103 is provided with a limiting hole 111 for the rotation of the opposing threaded post 106. One end of the opposing threaded post 106 is equipped with a cross nut 107 for controlling the position of the movable frame 2 by rotating the opposing threaded post 106, thus completing the double locking of the cable (locking post 110 of the terminal block 108 + movable locking clip 207 and fixed locking clip). After the elastic clamping of the 3rd layer is engaged, press the switch button 101 on one side of the outer casing 1. The internal electronic components of the power supply are powered on, and the power is converted into electrical energy through the core functional components (such as the rectifier bridge, power switching tube, PWM controller, etc.) to supply power to the load. During operation, if the cable 109 is pulled by an external force, the clamping force of the movable locking clamp 207 and the fixed locking clamp 3 can offset part of the pulling force. At the same time, the elastic buffer of the spring 204 can absorb the instantaneous impact force to prevent the connection between the cable 109 and the terminal block 108 from becoming loose. The outer casing 1 and the protective casing 102 continuously protect the internal components, prevent dust and external forces from damaging the structure, and ensure that the wiring protection function is effective for a long time.

[0023] To ensure the long-term stable operation of switching power supplies with wiring protection, targeted measures need to be developed from five core dimensions: environmental adaptation, maintenance, material selection, structural compatibility, and operational procedures. These measures should be tailored to the characteristics of each power supply component (such as housing 1, protective shell 102, spring 204, and terminal block 108) to mitigate adverse effects. For example, switching power supplies are susceptible to environmental factors such as temperature, humidity, dust, and vibration; therefore, "protection upgrades + scenario adaptation" are necessary to ensure operational stability. For high-temperature environments, ventilation holes (with dust filters) can be added to the top of housing 1, and a high-temperature resistant cooling fan (if the power supply power is >100W) can be selected to prevent core components such as power switching transistors and high-frequency transformers from aging due to high temperatures. In humid or outdoor environments, the sealing performance between protective shell 102 and housing 1 needs to be strengthened. A weather-resistant waterproof rubber ring should be installed at the connection between protective shell 102 and the middle partition 104. Simultaneously, the terminal block 108 should be replaced with an IP65-rated waterproof terminal block to prevent rainwater and dew from seeping into the interior through the gap in the cable 109 connection, which could lead to terminal oxidation and short circuits. To address vibration issues in industrial settings, in addition to relying on the elastic buffering of spring 204, rubber shock-absorbing pads can be installed between the cross plate 103 and the mounting surface to reduce the impact of vibration on the guide column 301 and the opposing threaded column 106, preventing displacement of the movable frame 2 due to vibration and ensuring stable clamping of the movable locking clamp 207 and the fixed locking clamp 3. Furthermore, in dusty workshop environments, it is necessary to regularly clean the dust from the heat dissipation holes of the outer casing 1 and the surface of the protective casing 102 to prevent dust accumulation from clogging the heat dissipation channels and causing internal temperature increases. Scientific maintenance can prevent malfunctions caused by aging or loosening of components. It should be carried out according to the principle of "regular inspection + replacement as needed". Monthly key inspections of wiring-related structures are required: rotate the locking post 110 on top of the terminal block 108 to confirm that its threads are not stripped. If the locking post 110 is found to be unable to effectively clamp the cable 109, it should be replaced with a locking post of the same specification immediately. Simultaneously, rotate the Phillips head nut 107 to check the rotational flexibility of the opposing threaded post 106. If jamming occurs, apply a small amount of high-temperature grease to the meshing point between the threaded groove 201 and the opposing threaded post 106 to prevent thread wear from causing the adjustment failure of the movable frame 2. Quarterly inspection of elastic components is required: Disassemble the hollow column 202 (if the clamping force of the movable locking clamp 207 decreases), check the spring 204 for deformation or corrosion. If the spring 204's elasticity weakens (e.g., it cannot spring back after compression), replace it with the same model spring to ensure the movable locking clamp 207 can continuously provide clamping force. Simultaneously check the sliding of the moving disc 205 within the circular groove 203. If scratches or jamming appear on the surface of the moving disc 205, clean impurities from the circular groove 203 and apply lubricant to ensure smooth movement. Annual comprehensive deep maintenance is required: Inspect the outer casing 1 and protective casing 102 for cracks or deformation. If the protective casing 102 is damaged due to impact, replace it immediately to prevent exposure of internal electronic components. Simultaneously measure the contact resistance between the terminal block 108 and the cable 109 (using a multimeter). If the contact resistance > 0.1Ω, re-crimp the cable or replace the terminal block to avoid overheating due to poor contact. Material properties directly affect the stability and lifespan of the power supply, requiring the selection of appropriate materials based on the functional requirements of different components. For load-bearing and wear-resistant components: the opposing threaded post 106 and guide post 301 are made of 304 stainless steel, replacing ordinary carbon steel, improving corrosion resistance and mechanical strength, and preventing thread wear or post deformation after long-term use; the movable frame 2 uses reinforced ABS engineering plastic (with added glass fiber), improving its high-temperature resistance (can withstand temperatures above 85℃) and impact resistance, preventing softening of the movable frame 2 due to increased internal temperature. For conductive and insulating components: the conductive sheet of the terminal block 108 is made of silver-plated copper to reduce contact resistance and heat generation; the protective shell 102 and hollow post 202 are made of flame-retardant PC plastic, meeting the UL94V-0 flame-retardant standard, preventing the spread of fire in the event of an internal short circuit. For elastic and sealing components: Spring 204 is made of piano wire (galvanized), which improves fatigue resistance and corrosion resistance and ensures elastic stability after long-term use; the sealing rings of protective shell 102 and outer shell 1 are made of ethylene propylene diene monomer (EPDM) rubber, which replaces ordinary rubber and improves weather resistance (it can adapt to the temperature range of -40℃ to 120℃) to avoid aging and failure of the sealing rings under extreme temperatures. In terms of emergency handling, if the cable 109 suddenly becomes loose during power operation (e.g., the movable locking clip 207 accidentally shifts), immediately press the switch button 101 on the outer casing 1 to cut off the power supply to avoid electric arc leakage and safety accidents. If a terminal short circuit and smoke occur, first disconnect the external main power supply. After the equipment cools down, disassemble the protective casing 102 and check if the terminal block 108 is burned. After replacing the damaged parts, rewiring and double locking must be completed according to specifications. Do not touch the wiring area directly while the power is on. In terms of compatibility, different sizes of movable locking clips 207 replacement parts can be equipped for different specifications of cables 109 (e.g., copper core cables with diameters of 1.5mm and 2.5mm). By replacing the movable locking clip 207 with the appropriate one, the problem can be solved. This ensures stable clamping for different cables. Additionally, the compatible cable specifications are marked next to the terminal block 108 to prevent insufficient clamping force or insulation damage due to incompatible cable models. For intelligent monitoring, temperature and current sensors can be installed inside the protective housing 102. These sensors are linked to an external alarm device. When the temperature in the terminal block 108 area exceeds 85℃ or the current in the cable 109 fluctuates abnormally, the alarm device will issue an audible and visual warning to alert personnel to troubleshoot the fault. Furthermore, a status indicator light is added to the surface of the housing 1. A green light indicates normal operation, while a red light indicates wiring abnormalities or faults, facilitating quick assessment of the power supply's operating status, further reducing the difficulty of troubleshooting, and improving safety and convenience.

[0024] The fitting accuracy of each component directly affects the wiring protection function, and optimization needs to be achieved through "assembly calibration + error control". During the production assembly stage: ensure that the fitting gap between the guide post 301 and the movable frame 2 is controlled between 0.05 and 0.1 mm. If the gap is too large, the movable frame 2 is prone to displacement, causing misalignment between the movable locking clamp 207 and the fixed locking clamp 3. Precision machining is required to ensure the cylindricity of the guide post 301 (tolerance ≤ 0.02 mm). At the same time, calibrate the installation position of the partition plate 104 and the protective shell 102, so that the partition plate 104 is located at the central axis of the protective shell 102, and ensure that the fixed locking clamps 3 on both sides are symmetrically distributed to avoid uneven force when the cable 109 is clamped. During the component design phase: optimize the thread accuracy of the threaded groove 201 and the opposing threaded post 106 (select 6H / 6g tolerance grade) to ensure smooth meshing and avoid jamming during adjustment of the moving frame 2 due to insufficient thread accuracy; at the same time, a guide groove is opened on the inner wall of the circular groove 203 of the hollow post 202, and a guide boss is set on the side of the moving plate 205 to prevent the connecting post 206 from shifting due to the rotation of the moving plate 205, and ensure that the clamping direction of the movable locking clamp 207 is accurately aligned with the cable 109. Improper operation is an important cause of power failure, and standardized operating procedures need to be established and strictly implemented. During wiring: First, turn off the switch button 101 on one side of the outer casing 1 to ensure power is off and avoid electric shock or short circuit during wiring; when connecting cable 109, the stripped length should be controlled between 5 and 8 mm (according to the specifications of terminal block 108). If the stripped length is too long, it may cause the cable core to be exposed and cause a short circuit. If the stripped length is too short, it will not be able to make effective contact with the terminal block; after wiring is completed, first rotate the locking pin 110 to initially fix the cable, and then rotate the cross nut 107 to adjust the moving bracket 2 so that the movable locking clamp 207 and the fixed locking clamp 3 clamp the cable. Avoid relying directly on the clamping structure for fixation and neglecting the terminal block locking, which may cause the cable to loosen. During disassembly and debugging: First, disconnect the external power supply, then rotate the Phillips head nut 107 in the opposite direction to move the movable frame 2 away from the partition plate 104. After the movable locking clamp 207 is released, rotate the locking post 110 to remove the cable. Avoid forcibly pulling the cable, which may damage the terminal block 108 or break the cable core. During debugging, if it is necessary to adjust the opposing threaded post 106, a Phillips head screwdriver of the matching specification must be used (avoid using non-compliant tools that may strip the Phillips head nut 107). When adjusting, rotate slowly and observe the position of the movable locking clamp 207 to avoid over-clamping and damaging the cable insulation layer.

[0025] Working principle When using this switching power supply with wiring protection, first connect the external cable 109 to the terminal block 108 on the side of the protective housing 102. Rotate the locking pin 110 on the top of the terminal block 108 to pre-fix the cable 109 in the terminal block using the threaded clamping force, preventing it from falling off directly. At this time, the housing 1 protects the internal components, the switch button 101 is closed to prevent accidental power-on, and the horizontal plate 103 supports the structure. Its limiting hole 111 limits the opposing threaded post 106. Rotate the cross nut 107 at one end of the opposing threaded post 106 to make the opposing threaded post 106 rotate within the limiting plate 105 of the middle partition 104 (the limiting plate 105 restricts its axial displacement). Because the opposing threaded post 106 has a bidirectional thread, it meshes with the threaded groove 201 of the movable frame 2. When rotated, the two movable frames 2 will move in opposite directions along the guide post 301 (through the partition plate 104 and the movable frame 2), moving closer to the partition plate 104 to facilitate clamping the cable. The movable frame 2 drives the side hollow post 202 to move, so that the movable locking clip 207 at the end of the hollow post 202 is close to both sides of the cable 109. Continue to turn the cross nut 107, and the movable locking clip 207 is subjected to a reaction force, pushing the connecting post 206 into the circular groove 203 of the hollow post 202, which drives the movable disc 205 to compress the spring 204. When the movable locking clip 207 and the fixed locking clips 3 on both sides of the partition plate 104 are in contact with the cable, the elastic force of the spring 204 clamps the cable, forming a double lock. Pressing the switch button 101, the internal components of the power supply are powered on. If the cable 109 is pulled during operation, the clamping force of the movable locking clamp 207 and the fixed locking clamp 3, as well as the buffering force of the spring 204, can prevent the cable from loosening from the terminal block 108, and the outer shell 1 and the protective shell 102 continuously protect the internal components.

[0026] It should be noted that in this article, relational terms such as one and two are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A switching power supply with wiring protection, comprising a housing (1) for protecting internal components, characterized in that: A switch button (101) is installed on one side of the housing (1), and two horizontal plates (103) for providing support are symmetrically installed on the other side of the housing (1). The outer casing (1) is provided with a protective shell (102) for mounting electronic components. The protective shell (102) is fixedly provided with a middle partition (104) for providing a limit. The middle partition (104) is rotatably connected to a limiting disk (105) for limiting rotational displacement. The limiting disk (105) is connected to opposing threaded columns (106) for providing opposing moving force on both sides. The opposing threaded columns (106) are rotatably connected to two moving frames (2) on their outer periphery. The surfaces of the two moving frames (2) are provided with threaded grooves (201) for cooperating with the opposing threaded columns (106). Hollow columns (202) are installed on the sides of the moving frames (2). The two hollow columns (202) are symmetrically arranged on both sides of the middle partition (104).

2. A switching power supply with wiring protection according to claim 1, characterized in that: The hollow column (202) has a circular groove (203) inside for limiting the direction of movement, and a spring (204) for providing compressive force is connected inside the circular groove (203).

3. A switching power supply with wiring protection according to claim 2, characterized in that: The end of the spring (204) is connected to a movable disk (205), which is slidably disposed inside the circular groove (203). A connecting post (206) is connected to the side of the movable disk (205) away from the spring (204), and a movable locking clamp (207) for compression and fixing is installed at the end of the connecting post (206) away from the movable disk (205).

4. A switching power supply with wiring protection according to claim 1, characterized in that: The protective shell (102) has a terminal block (108) for external connection on its side, a cable (109) for power supply connected to the side of the terminal block (108), and a locking pin (110) for locking the cable (109) on the top of the terminal block (108).

5. A switching power supply with wiring protection according to claim 3, characterized in that: Both sides of the partition plate (104) are equipped with a fixed locking clip (3) for locking the cable (109) in conjunction with the movable locking clip (207).

6. A switching power supply with wiring protection according to claim 1, characterized in that: A guide post (301) for limiting the movement direction of the moving frame (2) is fixedly installed between the two horizontal plates (103). The guide post (301) completely penetrates the interior of the middle partition (104) and the moving frame (2).

7. A switching power supply with wiring protection according to claim 1, characterized in that: The surface of the horizontal plate (103) is provided with a limiting hole (111) for rotating the opposing threaded column (106), and a cross nut (107) for rotating the opposing threaded column (106) to control the position of the moving frame (2).

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