Testing device for switching performance of LED driving power supply

Abstract

The invention relates to a device for testing the switching performance of an LED driving power supply, in particular to the technical field of electronic tests.The device comprises a testing device body, and a heat dissipation auxiliary mechanism and a buffer adjusting mechanism are arranged in the testing device body and used for guaranteeing the stability of the tested LED driving power supply in the switching performance testing process; according to the invention, the buffer adjusting mechanism is arranged, so that the normally open contact and the normally closed contact of the relay realize soft landing switching under the action of the buffer elastic sheet, transient impact current and mechanical impact are remarkably reduced, and the situation that the response of the driving power supply at the switching moment is influenced by contact jitter is avoided; the two supporting plates can be respectively pushed to be close to or away from each other synchronously, so that the pressure of the damping bar can be accurately adjusted to adapt to switching conditions of different LED driving power supplies, the guide rail structure further ensures stable movement of the damping assembly, and the consistency of contact switching actions is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic testing, in particular to a testing device for switching performance of an LED driving power supply. BACKGROUND

[0002] With the rapid development of LED lighting technology, the performance of LED driving power supply as its core component directly affects the stability and life of LED lamps, especially in practical applications, LED driving power supply needs to have good switching performance, which can quickly and smoothly switch under different working modes or power supply conditions to ensure the normal work of LED light source.

[0003] In the actual implementation process, there are still some problems:

[0004] 1. When the existing LED driving power supply is tested for switching performance, it is often necessary to simulate different working conditions to evaluate the response ability and stability of the driving power supply at the switching moment. However, the traditional testing device is mostly of simple wiring structure, lacking complete heat dissipation channels and environmental regulation mechanisms, which leads to overheating of the driving power supply during continuous switching test, thereby affecting the accuracy of the test results. In addition, the contact switching mechanism of the existing test equipment mostly adopts rigid contact structure, which can easily produce impact current at the moment of contact switching, causing the voltage of the measured driving power supply to change suddenly, and even leading to the destruction of the steady-state characteristics, making it difficult to truly reflect the switching performance of the driving power supply, and the test reliability is poor.

[0005] 2. The relay structure for power switching performance test is generally not configured with a buffer adjustment component, and the contact switching action is relatively harsh, lacking adjustable ability to contact pressure, which is not conducive to controlling the degree of contact wear and switching transient fluctuation. At the same time, the internal environment of the traditional testing device is mostly natural ventilation or simple exhaust, and the internal humidity and heat cannot be effectively controlled, resulting in low efficiency of moisture-absorbing materials and slow heat dissipation speed, which is not conducive to maintaining a stable test environment. Especially in long-term testing, internal heat accumulation will further exacerbate measurement errors. The heat management structure of the existing technology also rarely uses heat dissipation fins, heat dissipation copper pipes and heat plates in coordination, and the overall thermal stability still has room for improvement. SUMMARY

[0006] (I)Technical problems to be solved

[0007] In order to solve the above problems of the prior art, the present application provides a testing device for switching performance of an LED driving power supply, which solves the problems of inefficient and stable testing of the switching performance of the LED driving power supply and the aggravation of wear caused by mechanical impact of the contact.

[0008] (II)Technical scheme

[0009] In order to achieve the above purpose, the main technical scheme adopted by the present application is:

[0010] The utility model provides a kind of test device of switching performance of LED driving power supply, including test device body, the inside of the test device body is respectively provided with heat dissipation auxiliary mechanism and buffer adjustment mechanism, for guarantee the stability of the LED driving power supply being measured during switching performance test process;

[0011] The heat dissipation auxiliary mechanism includes adapter, filter box, air inlet pipe and air inlet fan, the air inlet pipe is fixedly connected with one side of filter box, and the top of filter box is connected with air inlet fan;

[0012] The buffer adjustment mechanism includes lead screw, support plate, insulation and damping strip, the inner side of two support plates is respectively fixedly connected with the back of two insulations, the inner wall of two insulations is all provided with sliding slot, the inner wall of two sliding slots is all vertically slidably connected with damping strip, and the bottom of two support plates is slidably connected to the top of guide rail.

[0013] Preferably, the outer wall of the test device body is fixedly connected with a protective box, the adapter is rotatably connected to the inner wall of the protective box and penetrates the back of the protective box, for realizing air circulation and environmental control.

[0014] Preferably, the air inlet end of the air inlet pipe penetrates the protective box, the air outlet end of the air inlet pipe is placed in the inside of the filter box, the top of the filter box is connected with a guide, one side wall of the guide is fixedly connected with a connecting pipe, one end of the connecting pipe is fixedly connected with a conveying pipe, and one end of the conveying pipe is fixedly connected with a sealing ring one.

[0015] Preferably, the middle part of the adapter is provided with two installation grooves, the inner wall of two installation grooves is all clampedly connected with moisture absorbing cotton, the inner side of the sealing ring one is attached to the outer side of one of the installation grooves, the inner wall of the protective box is fixedly connected with a transmission motor, and the output end of the transmission motor is fixedly connected to one side wall of the adapter, to realize the alternate moisture absorption and regeneration function of moisture absorbing cotton.

[0016] Preferably, the other side wall of the protective box is fixedly connected with an exhaust pipe, one end of the exhaust pipe is placed in the inside of the protective box, the other end of the exhaust pipe is fixedly connected with a sealing ring two, the inner side of the sealing ring two is attached to the outer side of the other installation groove, for discharging hot air and realizing the regeneration of moisture absorbing cotton.

[0017] Preferably, the bottom end of the test device body is fixedly connected with a test table, the bottom end of the protective box is fixedly connected to the top of the test table, and the back of the protective box is fixedly embedded with heat dissipation fins.

[0018] Preferably, the inner side of the heat dissipation fin is fixedly connected with a heat-conducting copper pipe, the outer wall of the test device body is fixedly connected with a heat spreading plate, and one end of the heat-conducting copper pipe is fixedly connected to the outer side of the heat spreading plate, so as to realize heat conduction and temperature equalization.

[0019] Preferably, the inner wall of the protection box is fixedly connected with a relay, the inner part of the relay is respectively provided with a normally open contact and a normally closed contact, a buffer spring is arranged between the normally open contact and the normally closed contact, the buffer spring is connected to the inner wall of the relay body, and the two sides of the buffer spring are fixedly connected with two damping strips, so as to realize soft landing of the switching contact and reduce transient impact current.

[0020] Preferably, the threads of the two ends of the lead screw are opposite, the two ends of the lead screw are respectively threadedly connected with two support plates, one end of the lead screw is rotationally connected to the inner wall of the relay body, the other end of the lead screw penetrates through one side wall of the relay body and is fixedly connected with a handle, and the handle is used for adjusting the damping size of the buffer spring.

[0021] Preferably, the guide rail is fixedly connected to the inner wall of the relay, and is used for supporting the guided movement of the support plate and the buffer spring, so as to realize stability of the switching action.

[0022] (Three) beneficial effects

[0023] The beneficial effects of the present application are:

[0024] 1. In the present application, the heat dissipation auxiliary mechanism is arranged in the test device body, so that the air inlet pipe, the filter box, the air inlet fan and the moisture absorbing cotton cooperate to form a controllable air circulation path, the stable temperature and humidity environment can be maintained during the LED drive power switching performance test, the moisture absorbing cotton is driven by the adapter and the transmission motor to realize alternating moisture absorption and rapid regeneration, the internal humidity is maintained in a reasonable range, the environmental fluctuation is avoided to interfere with the switching performance, meanwhile, the heat dissipation fin, the heat-conducting copper pipe and the heat spreading plate constitute a high-efficiency heat conduction link, the heat generated during the test can be quickly dissipated, the thermal stability is improved, the drive power is prevented from being affected by the too high temperature rise to affect the accuracy of the test data, the present application can keep the internal environment of the test device constant under long-time test conditions, and the reliability of the switching test is improved.

[0025] 2. In this invention, by setting a buffer adjustment mechanism, the normally open and normally closed contacts of the relay achieve soft-land switching under the action of the buffer spring, significantly reducing transient inrush current and mechanical shock, and avoiding contact jitter affecting the response of the drive power supply at the moment of switching. The lead screw has a bidirectional thread, which can push the two support plates to move closer or further away synchronously, so that the pressure of the damping strip can be precisely adjusted to adapt to the switching conditions of different LED drive power supplies. The guide rail structure further ensures the stability of the damping component movement and improves the consistency of contact switching action. This invention can improve contact life, reduce test fluctuations, and ensure strong repeatability of switching action, making it more suitable as a standardized test platform for LED drive power supply switching performance. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of one side of the invention;

[0028] Figure 3 This is a schematic diagram of the main body of the testing device of the present invention;

[0029] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 This is a cross-sectional view of the protective box portion of the present invention;

[0031] Figure 6 This is a schematic diagram of the internal structure of the relay of the present invention;

[0032] Figure 7 For the present invention Figure 6 Enlarged view at point B in the middle;

[0033] Figure 8 This is a schematic diagram of the heat dissipation fin portion of the present invention;

[0034] Figure 9 For the present invention Figure 8 Enlarged view at point C;

[0035] Figure 10 For the present invention Figure 8 Enlarged view of point D in the middle.

[0036] [Explanation of Labels in the Attached Image]

[0037] 1. Protective box; 2. Test device body; 3. Test bench; 4. Heat dissipation auxiliary mechanism; 401. Exhaust pipe; 402. Guide component; 403. Heat dissipation fins; 404. Adapter; 405. Inlet pipe; 406. Filter box; 407. Inlet fan; 408. Mounting slot; 409. Connecting pipe; 410. Conveying pipe; 411. Sealing ring one; 412. Drive motor; 413. Sealing ring two; 414. Moisture-absorbing cotton; 415. Heat spreader plate; 416. Heat-conducting copper pipe; 5. Buffer adjustment mechanism; 501. Relay; 502. Handle; 503. Lead screw; 504. Buffer spring; 505. Normally open contact; 506. Normally closed contact; 507. Slide groove; 508. Damping strip; 509. Support plate; 510. Insulation; 511. Guide rail. Detailed Implementation

[0038] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Please refer to Figures 1 to 10 As shown, the present invention provides a testing device for LED driver power switching performance, comprising a testing device body 2. The testing device body 2 is characterized by having a heat dissipation auxiliary mechanism 4 and a buffer adjustment mechanism 5 internally. The heat dissipation auxiliary mechanism 4 includes an adapter 404, a filter box 406, an air inlet pipe 405, and an air intake fan 407. The air inlet pipe 405 is fixedly connected to one side of the filter box 406, and the air intake fan 407 is connected to the top of the filter box 406. The buffer adjustment mechanism 5 includes a lead screw 503, support plates 509, insulation 510, and damping strips 508. The inner sides of the two support plates 509 are fixedly connected to the back sides of the two insulation 510, and the inner walls of the two insulation 510 are each provided with a sliding groove 507. The inner walls of the two sliding grooves 507 are vertically slidably connected to the damping strips 508, and the bottom ends of the two support plates 509 are slidably connected to the top of the guide rail 511.

[0040] Optionally, a protective box 1 is fixedly connected to the outer wall of the test device body 2, and an adapter 404 is rotatably connected to the inner wall of the protective box 1 and penetrates the back of the protective box 1 to achieve air circulation and environmental control. In actual implementation, the protective box 1 is fixedly connected to the outer wall of the test device body 2, and the adapter 404 is rotatably connected to the inner wall of the protective box 1 and penetrates the back of the protective box 1. This structure allows the adapter 404 to rotate flexibly, effectively coordinating with the air circulation inside the protective box 1. The protective box 1 has good sealing performance, which can effectively block the influence of the external environment and provide stable temperature and humidity conditions for the internal test environment, ensuring the accuracy and reliability of the LED driver power supply switching performance test.

[0041] Optionally, the air inlet end of the air inlet pipe 405 penetrates through the protective box 1, and the air outlet end of the air inlet pipe 405 is placed inside the filter box 406. A guide 402 is connected to the top of the filter box 406, and a connecting pipe 409 is fixedly connected to one side wall of the guide 402. A conveying pipe 410 is fixedly connected to one end of the connecting pipe 409, and a sealing ring 411 is fixedly connected to one end of the conveying pipe 410. In actual implementation, the air inlet end of the air inlet pipe 405 penetrates through the protective box 1, and the air outlet end is placed inside the filter box 406. The top of the filter box 406 is connected to the guide 402, and a connecting pipe 409 is fixedly connected to the side wall of the guide 402. One end of the connecting pipe 409 is fixedly connected to the conveying pipe 410, and the other end of the conveying pipe 410 is fixedly connected to the sealing ring 411. This structure achieves a sealed and smooth introduction of air from the outside into the device, avoids air leakage, and ensures that the cold air that has been filtered and cooled by the liquid can be effectively delivered to the inside of the protective box 1, thereby improving heat dissipation efficiency.

[0042] Optionally, the adapter 404 has two mounting slots 408 in the middle, and the inner walls of the two mounting slots 408 are engaged with moisture-absorbing cotton 414. The inner side of the sealing ring 411 is attached to the outer side of one of the mounting slots 408. The inner wall of the protective box 1 is fixedly connected to a drive motor 412, and the output end of the drive motor 412 is fixedly connected to one side wall of the adapter 404, so as to realize the function of alternating moisture absorption and regeneration of the moisture-absorbing cotton. In actual implementation, the adapter 404 has two mounting slots 408 in the middle. The inner wall of each mounting slot 408 is fitted with a moisture-absorbing cotton 414. The inner side of the sealing ring 411 is attached to the outer side of one of the mounting slots 408. The inner wall of the protective box 1 is fixedly connected to the drive motor 412. The output end of the drive motor 412 is fixedly connected to one side wall of the adapter 404. This structure enables the moisture-absorbing cotton 414 in the mounting slots 408 to work alternately. The drive motor 412 drives the adapter 404 to rotate, so that the moisture-absorbing cotton 414 performs dehumidification and regeneration functions in turn, ensuring the dryness of the air entering the protective box 1 and improving the stability of the test environment.

[0043] Optionally, an exhaust pipe 401 is fixedly connected to the other side wall of the protective box 1. One end of the exhaust pipe 401 is placed inside the protective box 1, and the other end of the exhaust pipe 401 is fixedly connected to a sealing ring 413. The inner side of the sealing ring 413 is attached to the outer side of another mounting groove 408. In actual implementation, the exhaust pipe 401 is fixedly connected to the other side wall of the protective box 1. One end of the exhaust pipe 401 is placed inside the protective box 1, and the other end is fixedly connected to a sealing ring 413. The inner side of the sealing ring 413 is attached to the outer side of another mounting groove 408. The exhaust pipe 401 is used to exhaust hot air from the protective box 1. The hot air passes through the moisture-absorbing cotton 414 in the exhaust-side mounting groove 408, and the hot air evaporates the moisture in the moisture-absorbing cotton 414, thereby regenerating the moisture-absorbing cotton 414 and ensuring the air dehumidification efficiency of the device during long-term continuous operation.

[0044] Optionally, a test platform 3 is fixedly connected to the bottom of the test device body 2, and the bottom of the protective box 1 is fixedly connected to the top of the test platform 3. A heat dissipation fin 403 is fixedly embedded on the back of the protective box 1. In actual implementation, the test platform 3 is fixedly connected to the bottom of the test device body 2, and the protective box 1 is fixedly connected to the top of the test platform 3. The heat dissipation fin 403 is fixedly embedded on the back of the protective box 1. The heat dissipation fin 403 enhances the heat dissipation performance of the device, promotes rapid heat dissipation by increasing the heat dissipation area, and, in conjunction with the cooling airflow inside the protective box 1, effectively reduces the ambient temperature of the test environment, protects the tested LED driver power supply from high temperatures, and ensures the accuracy of the test data.

[0045] Optionally, a heat-conducting copper pipe 416 is fixedly connected to the inner side of the heat dissipation fins 403, and a heat spreader 415 is fixedly connected to the outer wall of the test device body 2. One end of the heat-conducting copper pipe 416 is fixedly connected to the outer side of the heat spreader 415 to achieve heat conduction and temperature uniformity. In actual implementation, the heat-conducting copper pipe 416 is fixedly connected to the inner side of the heat dissipation fins 403, and the heat spreader 415 is fixedly connected to the outer wall of the test device body 2. One end of the heat-conducting copper pipe 416 is fixedly connected to the outer side of the heat spreader 415. This structure achieves efficient heat conduction and dispersion between the fins and the heat spreader 415. The heat spreader 415 ensures uniform temperature distribution, prevents local overheating, improves heat dissipation, ensures temperature stability of the entire test device, and effectively extends the service life of the equipment and the tested components.

[0046] Optionally, a relay 501 is fixedly connected to the inner wall of the protective box 1. The relay 501 has a normally open contact 505 and a normally closed contact 506 inside. A buffer spring 504 is provided between the normally open contact 505 and the normally closed contact 506. The buffer spring 504 is connected to the inner wall of the relay 501 body. Two damping strips 508 are fixedly connected to both sides of the buffer spring 504 to achieve a soft landing of the switching contact and reduce transient inrush current. In actual implementation, the damping strips 508 are fixedly connected to both sides of the buffer spring 504. The damping strips 508 can move through the support plate 509 and the insulating guide buffer spring 504, allowing the moving contact to smoothly and softly land when it contacts the fixed contact, reducing transient inrush current and improving the service life and test stability of the relay 501 contacts.

[0047] Optionally, the two ends of the lead screw 503 have opposite threads, and both ends of the lead screw 503 are threadedly connected to two support plates 509 respectively. One end of the lead screw 503 is rotatably connected to the inner wall of the relay 501 body, and the other end of the lead screw 503 passes through one side wall of the relay 501 body and is fixedly connected to a handle 502 for adjusting the damping of the buffer spring. In actual implementation, rotating the adjustment handle 502 drives the lead screw 503 to rotate, causing the support plates 509 to move closer or further apart, thereby adjusting the clamping force of the insulation on the damping strip 508, realizing the adjustable damping of the buffer spring 504, and adapting to LED driver power supply switching tests under different load currents.

[0048] Optionally, the guide rail 511 is fixedly connected to the inner wall of the relay 501 to support the guide movement of the support plate (509) and the buffer spring 504, thereby achieving stability of the switching action.

[0049] Working principle: When in use, the LED driver power supply switching performance testing device of the present invention is mainly used to perform performance testing on a single power supply to achieve multi-channel voltage output switching, and simultaneously measure the voltage, current and stability parameters after switching, so as to evaluate the response and reliability of the LED driver power supply under different output modes during operation. When in use, the output terminal of the LED driver power supply under test is fixedly connected to the clamp on the top of the test device body 2. The clamp is evenly distributed along the connecting plate and can clamp multiple sets of connection terminals at the same time, ensuring that the multi-channel output remains stable during the switching process and avoiding loosening or poor contact. During the test, the user can switch the power output mode according to the needs, such as switching from a single 24V output to multiple outputs, including 24V, 5V or other preset voltages, to achieve real-time switching of multiple outputs, and the voltage value after switching is recorded and analyzed in real time by the test device.

[0050] To ensure testing accuracy and stability, the testing device is equipped with a heat dissipation auxiliary mechanism 4 inside the main body, including an adapter 404, a filter box 406, an air inlet pipe 405, and an air intake fan 407, plus a moisture-absorbing cotton 414 and a flow guide 402 to achieve smooth airflow and environmental regulation. The air intake fan 407 draws outside air into the air intake pipe 405, and filters it through the filter box 406 and liquid medium to remove impurities and dust, while reducing the air temperature. Then, it is transported to the protective box 1 through the guide 402 and the delivery pipe 410. Inside the protective box 1, the air must pass through the moisture-absorbing cotton 414 installed in the adapter 404 to complete further dehumidification treatment, ensuring low internal humidity and preventing moisture from affecting the stability of the LED driver power supply and test components. The moisture-absorbing cotton 414 drives the adapter 404 to rotate through the drive motor 412 to achieve alternating cycles of moisture absorption and regeneration, so that the air handling efficiency is stable for a long time and the internal environment is kept constant during long-term switching tests, thereby ensuring the authenticity and reliability of the measurement data of multi-output switching.

[0051] In terms of electrical switching, the test device is equipped with a relay 501 inside the protective box 1. The relay 501 is equipped with normally open contacts 505, normally closed contacts 506, and buffer springs 504. Damping strips 508 are fixedly connected to both sides of the buffer springs 504. Through the linkage between the lead screw 503 and the support plate 509, the damping of the buffer springs 504 can be adjusted, so that the contacts can achieve soft landing during switching, reduce transient inrush current, and avoid interference to the power output during switching. At the same time, the guide rail 511 ensures that the support plate 509 and the buffer springs 504 move stably in the vertical direction, avoiding the influence of offset or shaking on the contact performance of the contacts. By rotating the adjustment handle 502, the damping can be precisely controlled to adapt to switching tests under different load and current conditions, ensuring the repeatability and accuracy of the test results.

[0052] In addition, the test platform 3 is fixedly connected to the bottom of the test device, and heat dissipation fins 403 are embedded on the back of the protective box 1. The inner side of the fins is connected to the heat-conducting copper pipe 416 and connected to the heat spreader 415, so as to realize the efficient conduction and dispersion of heat in the protective box 1. The heat spreader 415 ensures the uniform distribution of internal temperature and prevents local overheating. When the LED driver power supply under test switches different output voltages, it will generate instantaneous heat. The heat dissipation and air circulation system can quickly remove excess heat and keep the test environment temperature stable, thereby ensuring that the voltage and current measurement values ​​after switching are accurate and can truly reflect the power supply switching performance.

[0053] Through the above structural design, the present invention can realize real-time testing of switching from a single 24V output to multiple outputs (such as 24V+5V) on an LED driver power supply, and synchronously collect output parameters at the moment of switching. Combined with the functions of heat dissipation and buffering mechanism, it can achieve high accuracy, high reliability and environmental stability of test data. It solves the problem that traditional test devices cannot effectively measure multiple output switching and transient interference during switching, and provides a reliable technical means for evaluating the switching performance of LED driver power supplies.

[0054] The above description shows and illustrates the basic principles, main features, and advantages of the present invention. Standard parts used in the present invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0055] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A testing device for LED driver power switching performance, comprising a testing device body (2), characterized in that: The test device body (2) is equipped with a heat dissipation auxiliary mechanism (4) and a buffer adjustment mechanism (5) to ensure the stability of the LED driver power supply under test during the switching performance test. The heat dissipation auxiliary mechanism (4) includes an adapter (404), a filter box (406), an air inlet pipe (405), and an air intake fan (407). The air inlet pipe (405) is fixedly connected to one side of the filter box (406), and the air intake fan (407) is connected to the top of the filter box (406). The buffer adjustment mechanism (5) includes a lead screw (503), a support plate (509), an insulator (510), and a damping strip (508). The inner sides of the two support plates (509) are fixedly connected to the back sides of the two insulators (510), and the inner walls of the two insulators (510) are provided with sliding grooves (507). The inner walls of the two sliding grooves (507) are vertically slidably connected with damping strips (508). The bottom ends of the two support plates (509) are slidably connected to the top end of the guide rail (511).

2. The testing device for LED driver power supply switching performance according to claim 1, characterized in that: The outer wall of the test device body (2) is fixedly connected to a protective box (1), and the adapter (404) is rotatably connected to the inner wall of the protective box (1) and penetrates the back of the protective box (1) to realize air circulation and environmental control.

3. The testing device for LED driver power supply switching performance according to claim 2, characterized in that: The air inlet end of the air inlet pipe (405) passes through the protective box (1), and the air outlet end of the air inlet pipe (405) is placed inside the filter box (406). The top of the filter box (406) is connected to a guide (402), and a connecting pipe (409) is fixedly connected to one side wall of the guide (402). One end of the connecting pipe (409) is fixedly connected to a conveying pipe (410), and one end of the conveying pipe (410) is fixedly connected to a sealing ring (411).

4. The testing device for LED driver power supply switching performance according to claim 3, characterized in that: The adapter (404) has two mounting slots (408) in the middle. The inner walls of the two mounting slots (408) are fitted with absorbent cotton (414). The inner side of the sealing ring (411) is attached to the outer side of one of the mounting slots (408). The inner wall of the protective box (1) is fixedly connected with a drive motor (412). The output end of the drive motor (412) is fixedly connected to one side wall of the adapter (404) to realize the function of alternating moisture absorption and regeneration of absorbent cotton.

5. The testing device for LED driver power supply switching performance according to claim 4, characterized in that: An exhaust pipe (401) is fixedly connected to the other side wall of the protective box (1). One end of the exhaust pipe (401) is placed inside the protective box (1), and the other end of the exhaust pipe (401) is fixedly connected to a sealing ring two (413). The inner side of the sealing ring two (413) is attached to the outer side of another mounting groove (408) for discharging hot air and realizing the regeneration of the moisture-absorbing cotton.

6. The testing device for LED driver power switching performance according to claim 2, characterized in that: The bottom of the test device body (2) is fixedly connected to the test platform (3), the bottom of the protective box (1) is fixedly connected to the top of the test platform (3), and the back of the protective box (1) is fixedly embedded with heat dissipation fins (403).

7. The testing device for LED driver power supply switching performance according to claim 6, characterized in that: A heat-conducting copper pipe (416) is fixedly connected to the inner side of the heat dissipation fins (403), and a heat-spreading plate (415) is fixedly connected to the outer wall of the test device body (2). One end of the heat-conducting copper pipe (416) is fixedly connected to the outer side of the heat-spreading plate (415) to achieve heat conduction and temperature uniformity.

8. The testing device for LED driver power supply switching performance according to claim 7, characterized in that: A relay (501) is fixedly connected to the inner wall of the protective box (1). The relay (501) is provided with normally open contacts (505) and normally closed contacts (506) respectively. A buffer spring (504) is provided between the normally open contacts (505) and normally closed contacts (506). The buffer spring (504) is connected to the inner wall of the relay (501) body. The two sides of the buffer spring (504) are fixedly connected to two damping strips (508) respectively, which are used to realize the soft landing of the switching contacts and reduce the transient impact current.

9. The testing device for LED driver power supply switching performance according to claim 8, characterized in that: The two ends of the lead screw (503) have opposite threads. The two ends of the lead screw (503) are respectively threaded to two support plates (509). One end of the lead screw (503) is rotatably connected to the inner wall of the relay (501) body. The other end of the lead screw (503) passes through one side wall of the relay (501) body and is fixedly connected to a handle (502) for adjusting the damping size of the buffer spring.

10. The testing device for LED driver power supply switching performance according to claim 9, characterized in that: The guide rail (511) is fixedly connected to the inner wall of the relay (501) to support the guiding movement of the support plate (509) and the buffer spring 504, thereby achieving stability of the switching action.

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