Driving power supply of LED lamp with overheating protection function

Abstract

The invention relates to an LED lamp driving power source with an overheating protection function, and relates to the technical field of driving power sources, the LED lamp driving power source comprises a power source box and a heat absorption mechanism, a power source body is installed in the power source box, a plurality of heat conduction mechanisms are arranged at the top of the power source body, and the heat conduction mechanisms are distributed on the power source body at equal intervals; the heat conduction mechanism comprises a heat dissipation fin a fixedly connected with the top of the power source body, heat dissipation plates are fixed to the two ends of the heat dissipation fin a, and the heat dissipation plates are in a U shape. When the power source body continuously emits heat under the full-load working condition, the heat conduction mechanism can efficiently capture heat and transmit the heat to the heat absorption mechanism, the liquid thermal expansion medium in the heat absorption mechanism can rapidly rise the temperature, expand the volume and increase the pressure, and the pressure is transmitted to the shell through the guide pipe; and the primary switch and the secondary switch in the switching mechanism are separated.

Description

Technical Field

[0001] The present application relates to the technical field of driving power supplies, and in particular to a driving power supply for an LED lamp with an overheat protection function. Background Art

[0002] LED driver power supply is an important part of LED lamps. It can convert external primary electric energy into secondary electric energy required by LED. It is a power supply that converts power supply into a specific voltage and current to drive LED to emit light. The input power of LED driver power supply includes AC and DC, and the output power is generally a constant current whose voltage can change with the change of LED forward voltage.

[0003] In modern lighting systems, LED lamps are widely used due to their high efficiency, long life and environmental protection characteristics. However, as one of its core components, LED driver power supply is prone to failure due to overheating during long-term operation or in harsh environments, affecting the stability and reliability of the entire system. Existing LED driver power supplies mostly use fan cooling or simple temperature sensors combined with external controllers for overheating protection, but such methods are often slow to respond and are greatly affected by environmental factors. They cannot accurately cut off the power supply in an overheated state in real time, posing a safety hazard. Current overheating protection schemes generally lack an instant feedback mechanism, resulting in a failure to take prompt measures when the power supply is overheated. In addition, some schemes have low temperature detection accuracy, resulting in high false alarm and missed alarm rates, which seriously affects the safety and service life of LED lamps. Summary of the invention

[0004] The purpose of the present application is to provide a driving power supply for an LED lamp with an overheat protection function.

[0005] The present application provides a driving power supply for an LED lamp with an overheat protection function, which adopts the following technical solution: A driving power supply for an LED lamp with an overheat protection function, comprising a power supply box and a heat absorption mechanism, wherein a power supply body is installed inside the power supply box, and a plurality of groups of heat conduction mechanisms are arranged on the top of the power supply body, and the plurality of groups of heat conduction mechanisms are evenly distributed on the power supply body, and the heat conduction mechanism comprises a heat dissipation fin a fixedly connected to the top of the power supply body, and heat dissipation plates are fixedly connected to both ends of the heat dissipation fin a, and the shape of the heat dissipation plate is "U"-shaped, and heat dissipation fins b are fixedly connected to both sides of the power supply body, and heat conduction plates are fixedly connected to the outer sides of the heat dissipation fins b, and heat absorption mechanisms are arranged on both sides of the power supply body, and the heat absorption mechanism comprises an outer tube fixedly connected to the inside of the power supply box, and a heat dissipation tube is fixedly connected to the inside of the outer tube through a bracket, and one end of the outer tube is connected to a connecting tube, and the connecting tube One end is connected to a conduit, one end of the conduit is fixedly connected to a shell, a switch mechanism is arranged in the middle of the shell, the switch mechanism includes a second piston rod a slidably connected to one end of the shell, one end of the second piston rod a is fixedly connected to a push rod a, one end of the push rod a is fixedly connected to a mother switch, the other end of the shell is slidably connected to a second piston rod b, one end of the second piston rod b is fixedly connected to a push rod b, one end of the push rod b is fixedly connected to a sub-switch, both ends of the shell are provided with limiting mechanisms for limiting the movement of the second piston rod a and the second piston rod b, the limiting mechanism includes a first piston rod slidably connected to the inside of the shell, one end of the first piston rod is fixedly connected to an arc plate, one side of the arc plate is fixedly connected to the limiting plate, and the inside of the shell is fixedly connected to a fixing plate.

[0006] By adopting the above technical solution, when the power supply body continues to generate heat under full load working conditions, the heat conducting mechanism can efficiently capture the heat and transfer it to the heat absorbing mechanism. The liquid thermal expansion medium in the heat absorbing mechanism will quickly heat up, expand in volume, increase in pressure, and transmit the pressure to the casing through the conduit, so that the mother switch and the sub-switch in the switch mechanism are separated.

[0007] Optionally, the interior of the outer tube penetrates the heat dissipation fin a and the heat conductive sheet, one end of the heat dissipation fin a is fixed to the heat dissipation tube, one side of the heat dissipation tube is fixed to the heat conductive sheet, and the interior of the outer tube is filled with liquid thermal expansion medium.

[0008] By adopting the above technical solution, the heat dissipation fin a is in a "well" shape, which can increase the heat absorption area of ​​the power box, and then input the heat into the heat dissipation plate and the top of the heat dissipation tube. The "U"-shaped heat dissipation plate can import part of the heat into the side of the heat dissipation tube, and the two groups of heat dissipation fins b can absorb the heat on both sides of the power box and import it into the other side of the heat dissipation tube, so that the heat dissipation tube as a whole can be evenly heated, and heat can be efficiently captured and input into the heat dissipation tube in time. The heat dissipation tube 42 will transfer the heat to the liquid thermal expansion medium inside the outer tube 41, so that it will heat up rapidly, expand in volume, increase in pressure, and transfer the pressure to the outer shell 6 through the conduit 5.

[0009] Optionally, one end of the push rod a close to the mother switch is in contact with a push plate a, the outer side of the push plate a is slidably connected to the housing, and the outer side of the push rod a is slidably connected to the fixed plate.

[0010] Optionally, one end of the push rod b close to the sub-switch is in contact with a push plate b, the outer side of the push plate b is slidably connected to the housing, and the outer side of the push rod b is slidably connected to the fixed plate.

[0011] By adopting the above technical solution, when the second piston rod a and the second piston rod b are pressed and moved, they will respectively drive the push rod a and the push rod b to move, and then push the push plate a and the push plate b away from each other, so that the mother switch and the sub-switch are separated, completing the emergency cutting off of the power supply.

[0012] Optionally, the outer side of the limit plate is slidably connected to the shell, one end of the limit plate is snap-connected to the limit block, and a limit groove b matching the limit plate is provided inside the limit block.

[0013] Optionally, two groups of limit blocks are provided, the inner sides of the limit blocks in one group are fixedly connected to the second piston rod a, and the inner sides of the limit blocks in the other group are fixedly connected to the second piston rod b. Limiting grooves a are provided at both ends of the outer shell, and the limiting grooves a are slidably connected to the limit blocks.

[0014] By adopting the above technical solution, when the liquid thermal expansion medium expands due to heat so that the pressure threshold reaches a preset level, it will first push the first piston rod to move, causing the arc plate at one end of the first piston rod to move, and the limit plate on one side of the arc plate will disengage from the limit block, allowing the second piston rod a and the second piston rod b to move, ultimately triggering the separation of the sub-switch and the parent switch, thereby completing the emergency power cut-off.

[0015] Optionally, two groups of fixing plates are provided, and two groups of telescopic rods are fixedly connected to one side of the two groups of fixing plates.

[0016] Optionally, one end of two groups of telescopic rods is fixedly connected to the push plate a, and one end of the other two groups of telescopic rods is fixedly connected to the push plate b, and a spring is sleeved on the outer side of the telescopic rod.

[0017] By adopting the above technical solution, when the ambient temperature drops to the set safety range, the volume of the liquid thermal expansion medium will decrease and the pressure will decrease, so the second piston rod a and the second piston rod b will lose their driving force, and the push plate a and the push plate b will approach each other under the drive of the spring, indirectly pushing the second piston rod a and the second piston rod b back to their positions, and driving the parent switch and the sub-switch to reset contact.

[0018] In summary, the present application includes at least one of the following beneficial technical effects: 1. The driving power supply of the LED lamp with overheat protection function, when the power supply body continues to generate heat under full-load working conditions, the heat conductive sheet can efficiently capture the heat and transfer it to the heat dissipation tube, and the heat dissipation tube will transfer the heat to the liquid thermal expansion medium inside the outer tube, so that it will quickly heat up, expand in volume, and increase in pressure, and the pressure will be transmitted to the outer shell through the conduit, forcing the second piston rod a and the second piston rod b to move axially, and when the second piston rod a and the second piston rod b are pressed and moved, they will respectively drive the push rod a and the push rod b to move, and then push the push plate a and the push plate b away from each other, so that the mother switch and the child switch are separated, and the power supply is urgently cut off. In this way, through the above operation, the power supply can be instantly cut off when the LED driving power supply is overheated, which significantly reduces the probability of damage caused by thermal failure.

[0019] 2. The driving power supply of the LED lamp with overheat protection function is provided with a reset mechanism inside the shell. When the ambient temperature drops to the set safety range, the volume of the liquid thermal expansion medium will decrease and the pressure will decrease. Therefore, the second piston rod a and the second piston rod b will lose their driving force, and the push plate a and the push plate b will approach each other under the drive of the spring, indirectly pushing the second piston rod a and the second piston rod b back to their positions, and driving the parent switch and the sub-switch to make reset contact. At this time, the power supply body will resume the normal working mode. In this way, through the above operation, the sub-switch and the parent switch can be automatically reset after the battery temperature drops, which significantly enhances the robustness of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 It is a three-dimensional schematic diagram of the heat absorption mechanism of the present invention; Figure 3 It is a three-dimensional schematic diagram of the heat conduction mechanism of the housing of the present invention; Figure 4 It is a three-dimensional schematic diagram of the heat dissipation fin of the present invention; Figure 5 It is a three-dimensional cross-sectional schematic diagram of the housing of the present invention; Figure 6 It is a three-dimensional schematic diagram of a push rod a of the present invention; Figure 7It is an enlarged schematic diagram of A of the present invention.

[0021] Explanation of the accompanying drawings: 1. power box; 2. power supply body; 3. heat conduction mechanism; 31. heat dissipation fin a; 32. heat dissipation plate; 33. heat dissipation fin b; 34. heat conduction plate; 4. heat absorption mechanism; 41. outer tube; 42. heat dissipation tube; 43. connecting tube; 5. conduit; 6. outer shell; 7. limiting mechanism; 71. first piston rod; 72. arc plate; 73. limiting plate; 74. limiting block; 75. limiting groove a; 76. limiting groove b; 8. switch mechanism; 81. second piston rod a; 82. second piston rod b; 83. push rod a; 84. mother switch; 85. push plate a; 86. push rod b; 87. sub-switch; 88. push plate b; 9. reset mechanism; 91. telescopic rod; 92. spring; 10. fixing plate. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1 - Attachment Figure 7 , further details of this application are given.

[0023] Embodiment: A driving power supply for an LED lamp with an overheat protection function, comprising a power supply box 1 and a heat absorbing mechanism 4, wherein a power supply body 2 is installed inside the power supply box 1, and a plurality of heat conducting mechanisms 3 are arranged on the top of the power supply body 2, and the plurality of heat conducting mechanisms 3 are evenly distributed on the power supply body 2, and the heat conducting mechanism 3 comprises a heat dissipation fin a31 fixedly connected to the top of the power supply body 2, and heat dissipation plates 32 are fixedly connected at both ends of the heat dissipation fin a31, and the shape of the heat dissipation plate 32 is "U"-shaped, and the heat dissipation fins a31 are fixedly connected to the top of the power supply body 2. The heat fin b33 is fixedly connected to the outer side of the heat dissipation fin b33 with a heat conducting sheet 34. Both sides of the power supply body 2 are provided with a heat absorbing mechanism 4. The heat absorbing mechanism 4 includes an outer tube 41 fixedly connected to the inside of the power supply box 1. The inside of the outer tube 41 is fixedly connected to a heat dissipation tube 42 through a bracket. One end of the outer tube 41 is connected to a connecting tube 43. One end of the connecting tube 43 is connected to a conduit 5. One end of the conduit 5 is fixedly connected to a shell 6. A switch mechanism 8 is provided in the middle of the shell 6. The switch mechanism 8 includes a first A second piston rod a81, one end of which is fixed with a push rod a83, one end of which is fixed with a mother switch 84, the other end of the housing 6 is slidably connected with a second piston rod b82, one end of which is fixedly connected with a push rod b86, one end of which is fixedly connected with a sub-switch 87, and both ends of the housing 6 are provided with a limiting mechanism 7 for limiting the movement of the second piston rod a81 and the second piston rod b82, the limiting mechanism 7 includes a first piston rod 7 slidably connected to the inside of the housing 6 1, one end of the first piston rod 71 is fixedly connected to an arc plate 72, one side of the arc plate 72 is fixedly connected to a limit plate 73, and the interior of the housing 6 is fixedly connected to a fixing plate 10. When the power source body 2 continues to generate heat under full load working conditions, the heat conducting mechanism 3 can efficiently capture the heat and transfer it to the heat absorbing mechanism 4. The liquid heat expansion medium in the heat absorbing mechanism 4 will quickly heat up, expand in volume, increase in pressure, and transmit the pressure to the housing 6 through the conduit 5, so that the mother switch 84 and the child switch 87 in the switch mechanism 8 are separated.

[0024] The interior of the outer tube 41 is penetrated by the heat dissipation fin a31 and the heat conductive sheet 34. One end of the heat dissipation fin a31 is fixed to the heat dissipation tube 42, and one side of the heat dissipation tube 42 is fixed to the heat conductive sheet 34. The interior of the outer tube 41 is filled with a liquid thermal expansion medium. The heat dissipation fin a31 is in the shape of a "well", which can increase the heat absorption area of ​​the power box 1, and then input the heat to the heat dissipation plate 32 and the top of the heat dissipation tube 42. The "U"-shaped heat dissipation plate 32 can import part of the heat to the side of the heat dissipation tube 42, and the two groups of heat dissipation fins b33 can absorb the heat on both sides of the power box 1 and import it to the other side of the heat dissipation tube 42, so that the heat dissipation tube 42 is evenly heated as a whole, and can efficiently capture heat and input heat into the heat dissipation tube 42 in time. The heat dissipation tube 42 will transfer the heat to the liquid thermal expansion medium inside the outer tube 41, causing it to heat up rapidly, expand in volume, increase in pressure, and transmit the pressure to the outer shell 6 through the conduit 5.

[0025] One end of the push rod a83 close to the mother switch 84 abuts against a push plate a85, the outer side of the push plate a85 is slidably connected to the outer shell 6, the outer side of the push rod a83 is slidably connected to the fixed plate 10, and one end of the push rod b86 close to the sub-switch 87 abuts against a push plate b88, the outer side of the push plate b88 is slidably connected to the outer shell 6, and the outer side of the push rod b86 is slidably connected to the fixed plate 10. When the second piston rod a81 and the second piston rod b82 are pressed and moved, they will respectively drive the push rod a83 and the push rod b86 to move, thereby pushing the push plate a85 and the push plate b88 away from each other, so that the mother switch 84 and the sub-switch 87 are separated, and the emergency power supply is cut off.

[0026] The outer side of the limit plate 73 is slidably connected to the shell 6, and one end of the limit plate 73 is engaged with the limit block 74. The interior of the limit block 74 is provided with a limit groove b76 matching the limit plate 73. The limit block 74 is provided with two groups. The inner side of one group of limit blocks 74 is fixedly connected to the second piston rod a81, and the inner side of the other group of limit blocks 74 is fixedly connected to the second piston rod b82. Both ends of the shell 6 are provided with limit grooves a75, and the limit grooves a75 are slidably connected to the limit blocks 74. When the liquid thermal expansion medium expands due to heat and causes the pressure threshold to reach a preset level, it will first push the first piston rod 71 to move, so that the arc plate 72 at one end of the first piston rod 71 moves, and the limit plate 73 on one side of the arc plate 72 will be disengaged from the engagement with the limit block 74, so that the second piston rod a81 and the second piston rod b82 can move, and finally trigger the sub-switch 87 to separate from the parent switch 84, completing the emergency power cut-off.

[0027] There are two groups of fixed plates 10, and two groups of telescopic rods 91 are fixedly connected to one side of the two groups of fixed plates 10. One end of the two groups of telescopic rods 91 is fixedly connected to the push plate a85, and one end of the other two groups of telescopic rods 91 is fixedly connected to the push plate b88. A spring 92 is sleeved on the outer side of the telescopic rod 91. When the ambient temperature drops to the set safety range, the volume of the liquid thermal expansion medium will decrease and the pressure will decrease. Therefore, the second piston rod a81 and the second piston rod b82 will lose their driving force. The push plate a85 and the push plate b88 will approach each other under the drive of the spring 92, indirectly pushing the second piston rod a81 and the second piston rod b82 back to their positions, and driving the parent switch 84 and the child switch 87 to reset contact.

[0028] The implementation principle of the embodiment of the present application is as follows: when the power supply body 2 continues to generate heat under full load working conditions, the multiple sets of heat conduction mechanisms 3 will absorb the heat generated on the power supply body 2, the heat dissipation fins a31 are in a "well" shape, which can increase the heat absorption area of ​​the power supply box 1, and then input the heat to the heat dissipation plate 32 and the top of the heat dissipation tube 42, the "U"-shaped heat dissipation plate 32 can introduce part of the heat to the side of the heat dissipation tube 42, and the two sets of heat dissipation fins b33 can absorb the heat on both sides of the power supply box 1 and introduce it to the other side of the heat dissipation tube 42, so that the heat dissipation The heat tube 42 is evenly heated as a whole, and can efficiently capture heat and input the heat into the heat dissipation tube 42 in time. The heat dissipation tube 42 transfers the heat to the liquid heat expansion medium inside the outer tube 41, causing it to heat up rapidly, expand in volume, and increase in pressure. The pressure is then transferred to the outer shell 6 through the conduit 5, forcing the second piston rod a81 and the second piston rod b82 to move axially. When the second piston rod a81 and the second piston rod b82 are pressed and moved, they will respectively drive the push rod a83 and the push rod b86 to move, thereby pushing the push plate a85. The push plate b88 moves away from each other, so that the mother switch 84 and the sub-switch 87 are separated, and the emergency power cut-off is completed. In order to prevent the mother switch 84 and the sub-switch 87 from being separated when the temperature threshold is not reached, by setting a limit mechanism 7 at both ends of the shell 6, when the liquid thermal expansion medium expands due to heat so that the pressure threshold reaches a preset level, it will first push the first piston rod 71 to move, so that the arc plate 72 at one end of the first piston rod 71 moves, and the limit plate 73 on one side of the arc plate 72 will be separated from the engagement with the limit block 74, so that the second piston rod a81 and the second piston rod b82 can move, and finally trigger the sub-switch 87 to separate from the mother switch 84, and complete the emergency power cut-off. This series of chain reactions is automatically completed within a few milliseconds, which significantly improves the speed and accuracy of overheat protection, and under the limitation of the limit block 74, the movement of the second piston rod a81 and the second piston rod b82 is limited within a predetermined range through the limit groove a75. In this way, the power supply can be instantly cut off when the LED driving power supply is overheated through the above operation, which significantly reduces the probability of damage caused by thermal failure. By adding a reset mechanism 9 inside the housing 6, when the ambient temperature drops to the set safety range, the volume of the liquid thermal expansion medium will decrease and the pressure will decrease, so the second piston rod a81 and the second piston rod b82 will lose their driving force, and the push plates a85 and b88 will approach each other under the drive of the spring 92, and indirectly push the second piston rod a81 and the second piston rod b82 back to their positions through the push rods a83 and b86, and drive the mother switch 84 and the sub-switch 87 to reset and contact, at which time the power supply body 2 will resume the normal working mode. In addition, the spring 92 also helps to eliminate the gap between the sub-switch 87 and the mother switch 84, improve the electrical connection stability, and effectively reduce the maintenance cost and extend the service life of the whole machine. In this way, through the above operation, the sub-switch 87 and the mother switch 84 can be automatically reset after the battery temperature drops, which significantly enhances the system robustness; In response to emergencies that may occur in extreme environments, additional remote monitoring and early warning functions are integrated, and real-time monitoring of equipment status is achieved using IoT technology and cloud platforms. Once an abnormal temperature rise trend is detected, the cooling system can be started in advance or maintenance personnel can be notified to intervene, thereby preventing potential overheating risks to the greatest extent possible. A wireless communication module is embedded in the power control system, and operating data is uploaded to the cloud server on a regular basis. Historical records are analyzed through AI algorithms to predict the possibility of overheating. Once a hidden danger is determined, an instruction is immediately sent to activate the emergency response plan, automatically start the forced air cooling system, or push warning messages to managers, instructing on-site personnel to take necessary measures, such as temporarily interrupting the power supply line until the professional team has inspected and confirmed that everything is correct before restoring it.

[0029] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A driving power supply for an LED lamp with an overheat protection function, comprising a power supply box (1) and a heat absorption mechanism (4), wherein a power supply body (2) is installed inside the power supply box (1), and a plurality of groups of heat conduction mechanisms (3) are arranged on the top of the power supply body (2), characterized in that: A plurality of groups of heat-conducting mechanisms (3) are distributed at equal intervals on the power supply body (2), the heat-conducting mechanism (3) comprising a heat-dissipating fin a (31) fixedly connected to the top of the power supply body (2), heat-dissipating plates (32) fixedly provided at both ends of the heat-dissipating fin a (31), the heat-dissipating plates (32) having a "U" shape, heat-dissipating fins b (33) fixedly connected to both sides of the power supply body (2), heat-dissipating plates (34) fixedly connected to the outer sides of the heat-dissipating fins b (33), heat-absorbing mechanisms (4) are provided on both sides of the power supply body (2), the heat-absorbing mechanisms (4) comprising an outer tube (41) fixedly connected to the inside of the power supply box (1), the inside of the outer tube (41) being fixedly connected to a heat-dissipating tube (42) via a bracket, one end of the outer tube (41) being connected to a connecting tube (43), one end of the connecting tube (43) being connected to a conduit (5), one end of the conduit (5) being fixedly connected to a housing (6), and a switch mechanism (4) being provided in the middle of the housing (6). 8), the switch mechanism (8) comprises a second piston rod a (81) slidably connected to one end of the housing (6), a push rod a (83) is fixed to one end of the second piston rod a (81), a mother switch (84) is fixed to one end of the push rod a (83), a second piston rod b (82) is slidably connected to the other end of the housing (6), a push rod b (86) is fixed to one end of the second piston rod b (82), a sub-switch (87) is fixed to one end of the push rod b (86), and a limit mechanism (7) for limiting the movement of the second piston rod a (81) and the second piston rod b (82) is provided at both ends of the housing (6), the limit mechanism (7) comprises a first piston rod (71) slidably connected to the inside of the housing (6), one end of the first piston rod (71) is fixedly connected to an arc plate (72), one side of the arc plate (72) is fixedly connected to the limit plate (73), and a fixing plate (10) is fixedly connected to the inside of the housing (6).

2. The driving power supply of an LED lamp with overheat protection function according to claim 1, characterized in that: The interior of the outer tube (41) penetrates the heat dissipation fin a (31) and the heat conducting sheet (34); one end of the heat dissipation fin a (31) is fixed to the heat dissipation tube (42); one side of the heat dissipation tube (42) is fixed to the heat conducting sheet (34); and the interior of the outer tube (41) is filled with a liquid thermal expansion medium.

3. The driving power supply of an LED lamp with overheat protection function according to claim 1, characterized in that: One end of the push rod a (83) close to the mother switch (84) is in contact with a push plate a (85), the outer side of the push plate a (85) is slidably connected to the housing (6), and the outer side of the push rod a (83) is slidably connected to the fixed plate (10).

4. The driving power supply of an LED lamp with overheat protection function according to claim 1, characterized in that: One end of the push rod b (86) close to the sub-switch (87) is in contact with a push plate b (88), the outer side of the push plate b (88) is slidably connected to the housing (6), and the outer side of the push rod b (86) is slidably connected to the fixed plate (10).

5. The driving power supply of an LED lamp with overheat protection function according to claim 1, characterized in that: The outer side of the limit plate (73) is slidably connected to the housing (6), one end of the limit plate (73) is snap-fitted to the limit block (74), and a limit groove b (76) matching the limit plate (73) is provided inside the limit block (74).

6. The driving power supply of an LED lamp with overheat protection function according to claim 5, characterized in that: The limit blocks (74) are provided in two groups, the inner sides of the limit blocks (74) of one group are fixedly connected to the second piston rod a (81), and the inner sides of the limit blocks (74) of the other group are fixedly connected to the second piston rod b (82), and both ends of the housing (6) are provided with limit grooves a (75), and the limit grooves a (75) are slidably connected to the limit blocks (74).

7. The driving power supply of an LED lamp with overheat protection function according to claim 1, characterized in that: Two groups of the fixing plates (10) are provided, and one side of the two groups of fixing plates (10) is fixedly connected to two groups of telescopic rods (91).

8. The driving power supply of an LED lamp with overheat protection function according to claim 7, characterized in that: One end of two groups of telescopic rods (91) is fixedly connected to the push plate a (85), and one end of the other two groups of telescopic rods (91) is fixedly connected to the push plate b (88). The outer sides of the telescopic rods (91) are sleeved with springs (92).

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