Switching power supply power-off protection device

Abstract

The invention relates to the technical field of switching power supply power-off protection, in particular to a switching power supply power-off protection device, which comprises a positioning component, a detection component, a power-off component, an incoming cable and an outgoing cable, and is characterized in that the detection component comprises a detection box, and a first cover plate is arranged on the front side of the detection box; a first wire groove is formed in the lower side of the detection box, a first wiring component is arranged at the lower end of the interior of the detection box, a voltage sensor is arranged on the upper side of the first wiring component, and a first inserting rod is arranged at the upper end of the voltage sensor. Power-off operation is carried out in the mode that the first conductive component and the second conductive component are isolated through the isolation plate, the power-off protection effect is improved, helium is introduced into the power-off box through the fire-fighting component during power off to extinguish electric sparks, the risk of combustion and fire outbreak is reduced, and the detection component and the power-off component are fixed through the positioning component; and the installation convenience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power-off protection for switching power supplies, and specifically to a power-off protection device for a switching power supply. Background Technique

[0002] The power-off protection of a switching power supply is an important mechanism to ensure that the power supply can be safely shut down or enter the protection mode under abnormal conditions to prevent equipment damage or danger. The power-off protection mechanism of a switching power supply is crucial for the stability and reliability of electronic devices. When the input voltage suddenly changes or a fault occurs inside the power supply, the power-off protection mechanism can quickly respond to ensure that the power supply is safely shut down or the output is adjusted, thereby protecting the subsequent circuits and devices from damage.

[0003] The Chinese patent discloses an overload power-off protection structure for a switching power supply (authorized announcement number CN211428110U). In this patented technology, the wiring terminal of the switch body is connected to an external power supply to make the switch body energized, so that the current reaches the positive contact head through the arc chamber, and the negative contact head is connected to the bottom end of the wiring terminal. When the current is overloaded and transmitted, the spring in the power-off chamber will automatically push the positive contact head away, causing the switch body to cut off the power. During the power-off process, a certain arc will be generated, and the arc will burn at the gap of the insulating grid plates in the arc chamber to achieve the effect of arc extinguishing. However, the above-mentioned power-off protection device for a switching power supply relies on abnormal arcs for the switch to be pushed open and powered off. The temperature of the switching power supply is too high during the power-off operation, which is likely to damage the switching power supply, and there is a risk of combustion and fire, affecting the power-off protection effect. The isolation effect between the contact point and the conductive end after power-off is poor. When the arc in the power-off protection device of the switching power supply is not discharged in time, there is a risk of conduction, which is not conducive to the safety of use. Therefore, those skilled in the art have provided a power-off protection device for a switching power supply to solve the problems raised in the above background technique. Summary of the Invention

[0004] The purpose of the present invention is to provide a power-off protection device for a switching power supply to solve the problems raised in the above background technique.

[0005] To achieve the above object, the present invention provides the following technical solution: A power-off protection device for a switching power supply, comprising a positioning member, a detection member, a power-off member, an incoming cable and an outgoing cable. The detection member is located at the lower front position of the positioning member. The power-off member is located above the detection member. The incoming cable is located at the lower end of the detection member. The outgoing cable is located at the upper end of the power-off member. The detection member includes a detection box. A first cover plate is provided on the front side of the detection box. A first wire groove is opened on the lower side of the detection box. A first wiring member is provided at the lower inner position of the detection box. A voltage sensor is provided above the first wiring member. A first insertion rod is provided at the upper end of the voltage sensor. The power-off member includes a power-off box. A second wire groove is opened on the upper side of the power-off box. A second wiring member is installed at the upper inner position of the power-off box. A first conductive member is provided below the second wiring member. A second conductive member is provided at the lower inner position of the power-off box. Electrically adjustable telescopic rods are installed on both sides of the power-off box. An isolation plate is provided at the inner end of the electrically adjustable telescopic rod. A fire protection member is provided on the front side of the power-off box.

[0006] As a further solution of the present invention: The first wiring member includes a first fixing frame. A conducting wire is provided at the rear upper position of the first fixing frame. A first sliding rod is provided at the front end of the first fixing frame. A first pressing block is provided at the rear side of the first sliding rod. A first pushing and pulling plate is provided at the front side of the first sliding rod. A first spring is provided on the outer side of the first sliding rod at the corresponding side position of the first fixing frame and the first pressing block. Both the first conductive member and the second conductive member include a positioning block. A slot is opened inside the positioning block. A second sliding rod is provided inside the slot. A conductive plate is provided at the upper side of the second sliding rod. A limiting plate is provided at the lower side of the second sliding rod. A second spring is provided on the outer side of the second sliding rod at the corresponding side position of the positioning block and the conductive plate. The second wiring member includes a second fixing frame. A third sliding rod is provided at the front end of the second fixing frame. A second pressing block is provided at the rear side of the third sliding rod. A second pushing and pulling plate is provided at the front side of the third sliding rod. A third spring is provided on the outer side of the third sliding rod at the corresponding side position of the second fixing frame and the second pressing block. A second insertion rod is provided at the rear lower position of the second fixing frame. The fire protection member includes a second cover plate. An installation groove is opened on the front side of the second cover plate. A clamping clip is provided inside the installation groove. A helium gas cylinder is provided inside the clamping clip. A gas guiding hose is provided at one end of the helium gas cylinder. A jet pipe is installed inside the installation groove.

[0007] As a further solution of the present invention: sliding sleeves are provided on the rear sides of both the detection box and the power-off box. The positioning member includes a positioning plate. An installation track is provided on the front side of the positioning plate. A support plate is provided at the lower position of the front side of the positioning plate. Installation frames are provided on both sides of the upper end of the positioning plate. An adjustment screw is provided at the front end of the installation frame. A baffle is provided inside the adjustment screw.

[0008] As a further solution of the present invention: the upper end of the incoming cable is electrically connected to the first wiring member. The output end of the first wiring member is electrically connected to the input end of the voltage sensor. The output end of the voltage sensor is electrically connected to the input end of the first plug rod. The output end of the first plug rod is electrically connected to the input end of the second conductive member. The output end of the second conductive member is electrically connected to the input end of the first conductive member. The output end of the first conductive member is electrically connected to the input end of the second wiring member. The output end of the second wiring member is electrically connected to the input end of the outgoing cable.

[0009] As a further solution of the present invention: the upper end of the incoming cable slides inside the first wire groove. The lower end of the outgoing cable slides inside the second wire groove. The isolation plate slides inside the power-off box through an electric adjustment telescopic rod.

[0010] As a further solution of the present invention: the first pressing block slides inside the first fixing frame through a first sliding rod. The upper end of the incoming cable is located at the corresponding side of the first fixing frame and the first pressing block. The incoming cable is electrically connected to the voltage sensor through a conductive wire.

[0011] As a further solution of the present invention: the lower end of the second sliding rod slides inside the slot. The limiting plate slides inside the slot. The conductive plate slides on the upper side of the positioning block through the second sliding rod. The first plug rod slides inside the slot.

[0012] As a further solution of the present invention: the second pressing block slides inside the second fixing frame through a third sliding rod. The lower end of the outgoing cable is located at the corresponding side of the second fixing frame and the second pressing block. The outgoing cable is electrically connected to the second plug rod through the second fixing frame. The second plug rod slides inside the slot. The second fixing frame is electrically connected to the first conductive member through the second plug rod. The output end of the helium gas tank communicates with the input end of the air guide hose. The output end of the air guide hose communicates with the input end of the spray pipe. The output end of the spray pipe communicates with the power-off box.

[0013] As a further solution of the present invention: the sliding sleeve slides at the outer side position of the installation track, the outer end of the adjusting screw rotates at the front end position of the installation frame, the inner end of the adjusting screw rotates at the outer side position of the baffle, and the baffle slides at the inner side position of the installation frame through the adjusting screw.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The power-off protection device for a switching power supply of the present invention performs a power-off operation by isolating the first conductive member and the second conductive member through an isolation plate, avoiding excessive temperature during the power-off operation, damaging the switching power supply, improving the power-off protection effect, and introducing helium gas into the inside of the power-off box through a fire protection member to extinguish the electric spark during power-off, reducing the risk of combustion and fire;

[0016] 2. The electric adjustment telescopic rod is used to push the isolation plate to automatically isolate the first conductive member and the second conductive member, avoiding the electric arc in the power-off protection device of the switching power supply from connecting the circuit after power-off, and improving the safety of use;

[0017] 3. The positioning member is used to fix the detection member and the power-off member, improving the installation convenience and reducing the maintenance difficulty. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a power-off protection device for a switching power supply;

[0019] Figure 2 It is an exploded view of the detection member in a power-off protection device for a switching power supply;

[0020] Figure 3 It is a schematic structural diagram of the first wiring member in a power-off protection device for a switching power supply;

[0021] Figure 4 It is an exploded view of the power-off member in a power-off protection device for a switching power supply;

[0022] Figure 5 It is a perspective view of the second conductive member in a power-off protection device for a switching power supply;

[0023] Figure 6 It is a schematic structural diagram of the second wiring member in a power-off protection device for a switching power supply;

[0024] Figure 7 It is a schematic structural diagram of the fire protection member in a power-off protection device for a switching power supply;

[0025] Figure 8 It is a schematic structural diagram of the positioning member in a power-off protection device for a switching power supply.

[0026] In the figure: 1, positioning member; 2, detection member; 3, power-off member; 4, incoming cable; 5, outgoing cable; 6, detection box; 7, first cover plate; 8, first wire groove; 9, first wiring member; 10, voltage sensor; 11, first plugging rod; 12, power-off box; 13, second wire groove; 14, second wiring member; 15, first conductive member; 16, second conductive member; 17, electric adjustable telescopic rod; 18, partition board; 19, fire-fighting member; 20, first fixing frame; 21, conducting wire; 22, first sliding rod; 23, first pressing block; 24, first push-pull plate; 25, first spring; 26, positioning block; 27, slot; 28, second sliding rod; 29, conductive plate; 30, limiting plate; 31, second fixing frame; 32, third sliding rod; 33, second pressing block; 34, second push-pull plate; 35, third spring; 36, second plugging rod; 37, second cover plate; 38, installation groove; 39, clip; 40, helium gas cylinder; 41, gas guide hose; 42, air spraying pipe; 43, sliding sleeve; 44, positioning plate; 45, installation track; 46, support plate; 47, installation frame; 48, adjusting screw; 49, baffle; 50, second spring. Detailed implementation manners

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1-8In an embodiment of the present invention, a switching power supply power-off protection device includes a positioning member 1, a detection member 2, a power-off member 3, an incoming cable 4 and an outgoing cable 5, wherein the detection member 2 is located at the front lower end position of the positioning member 1, the power-off member 3 is located at the upper side position of the detection member 2, the incoming cable 4 is located at the lower end position of the detection member 2, and the outgoing cable 5 is located at the upper end position of the power-off member 3, the detection member 2 includes a detection box 6, the detection box 6, the detection box 6 is provided with a first cover plate 7 on the front side, the detection box 6 is provided with a first wire groove 8 on the lower side, the detection box 6 is provided with a first wiring member 9 at the lower end position inside the detection box 6, a voltage sensor 10 is provided on the upper side of the first wiring member 9, and a first plug-in rod 11 is provided on the upper end of the voltage sensor 10, and the power-off member 3 comprises a power-off box 12, a second wire groove 13 is provided on the upper side of the power-off box 12, a second wiring member 14 is installed at the upper end position of the inside of the power-off box 12, a first conductive member 15 is provided on the lower side of the second wiring member 14, a second conductive member 16 is provided at the lower end position of the inside of the power-off box 12, electric adjustable telescopic rods 17 are installed at both sides of the power-off box 12, an isolation plate 18 is provided at the inner end of the electric adjustable telescopic rod 17, a fire-fighting member 19 is provided on the front side of the power-off box 12, the upper end of the incoming cable 4 is electrically connected to the first wiring member 9, the output end of the first wiring member 9 is electrically connected to the input end of the voltage sensor 10, the output end of the voltage sensor 10 is electrically connected to the input end of the first plug-in rod 11, and the output end of the first plug-in rod 11 is electrically connected to the input end of the first plug-in rod 11. The output end is electrically connected to the input end of the second conductive member 16, the output end of the second conductive member 16 is electrically connected to the input end of the first conductive member 15, the output end of the first conductive member 15 is electrically connected to the input end of the second wiring member 14, the output end of the second wiring member 14 is electrically connected to the input end of the outgoing cable 5, the upper end of the incoming cable 4 slides to the internal position of the first wire groove 8, the lower end of the outgoing cable 5 slides to the internal position of the second wire groove 13, the isolation plate 18 slides to the internal position of the power disconnection box 12 through the electrically adjustable telescopic rod 17, first, the upper end of the incoming cable 4 is inserted through the first wire groove 8 into the first wiring member 9 to complete the connection of the incoming cable 4, and the lower end of the outgoing cable 5 is inserted through the second wire groove 13 into the second wiring member 14, complete the connection of the outgoing cable 5, then, the detection box 6 slides to the front side of the positioning member 1, the power-off box 12 slides to the front side of the positioning member 1, the first plug rod 11 is inserted into the second conductive member 16, the positioning member 1 positions the detection member 2 and the power-off member 3, and finally, start using, the current is introduced into the voltage sensor 10 through the incoming cable 4 and the first wiring member 9, the voltage sensor 10 detects the voltage, and after the detection, the current is led out through the first plug rod 11, the second conductive member 16, the first conductive member 15, the second wiring member 14 and the outgoing cable 5. When the voltage sensor 10 detects that the voltage is abnormal, the electric adjustment telescopic rod 17 runs to push the isolation plate 18 to move, and the isolation plate 18 is inserted into the corresponding sides of the first conductive member 15 and the second conductive member 16.Complete the isolation of the first conductive member 15 and the second conductive member 16. During the isolation process, the first wiring member 9 is opened, and the helium gas inside the first wiring member 9 is introduced into the inside of the power-off box 12 to extinguish the electric spark inside the power-off box 12.

[0029] At Figure 2 , 3, among 4, 5, 6, 7: The first wiring member 9 includes a first fixing frame 20. A conducting wire 21 is arranged at the rear end position on the upper side of the first fixing frame 20. A first sliding rod 22 is arranged at the front end of the first fixing frame 20. A first pressing block 23 is arranged at the rear side of the first sliding rod 22. A first push-pull plate 24 is arranged at the front side of the first sliding rod 22. A first spring 25 is arranged at the outer side of the first sliding rod 22 at the corresponding side position between the first fixing frame 20 and the first pressing block 23. Both the first conducting member 15 and the second conducting member 16 include a positioning block 26. A slot 27 is formed inside the positioning block 26. A second sliding rod 28 is arranged inside the slot 27. A conducting plate 29 is arranged at the upper side of the second sliding rod 28. A limiting plate 30 is arranged at the lower side of the second sliding rod 28. A second spring 50 is arranged at the outer side of the second sliding rod 28 at the corresponding side position between the positioning block 26 and the conducting plate 29. The second wiring member 14 includes a second fixing frame 31. A third sliding rod 32 is arranged at the front end of the second fixing frame 31. A second pressing block 33 is arranged at the rear side of the third sliding rod 32. A second push-pull plate 34 is arranged at the front side of the third sliding rod 32. A third spring 35 is arranged at the outer side of the third sliding rod 32 at the corresponding side position between the second fixing frame 31 and the second pressing block 33. A second insertion rod 36 is arranged at the rear end position on the lower side of the second fixing frame 31. The fire protection member 19 includes a second cover plate 37. An installation groove 38 is formed at the front side of the second cover plate 37. A clamping clip 39 is arranged inside the installation groove 38. A helium gas cylinder 40 is arranged at the inner side of the clamping clip 39. A gas guiding hose 41 is arranged at one end of the helium gas cylinder 40. An air spraying pipe 42 is installed at the inner side of the installation groove 38. The first pressing block 23 slides inside the first fixing frame 20 through the first sliding rod 22. The upper end of the incoming line cable 4 is at the corresponding side position between the first fixing frame 20 and the first pressing block 23. The incoming line cable 4 is electrically connected to the voltage sensor 10 through the conducting wire 21. The lower end of the second sliding rod 28 slides inside the slot 27. The limiting plate 30 slides inside the slot 27. The conducting plate 29 slides at the upper side of the positioning block 26 through the second sliding rod 28. The first insertion rod 11 slides inside the slot 27. The second pressing block 33 slides inside the second fixing frame 31 through the third sliding rod 32. The lower end of the outgoing line cable 5 is at the corresponding side position between the second fixing frame 31 and the second pressing block 33. The outgoing line cable 5 is electrically connected to the second insertion rod 36 through the second fixing frame 31. The second insertion rod 36 slides inside the slot 27. The second fixing frame 31 is electrically connected to the first conducting member 15 through the second insertion rod 36. The output end of the helium gas cylinder 40 is communicated with the input end of the gas guiding hose 41. The output end of the gas guiding hose 41 is communicated with the input end of the air spraying pipe 42. The output end of the air spraying pipe 42 is communicated with the power-off box 12. Pull the first push-pull plate 24, the first spring 25 contracts and the first sliding rod 22 slides at the front end of the first fixing frame 20. The first sliding rod 22 drives the first pressing block 23 to slide.Insert the upper end of the incoming cable 4 through the first wire groove 8 into the corresponding side of the first fixing frame 20 and the first pressure block 23, loosen the first push-pull plate 24, the first spring 25 extends the first slide bar 22 to slide at the front end of the first fixing frame 20, the first slide bar 22 drives the first pressure block 23 to slide, the first pressure block 23 is pressed to the outside of the incoming cable 4, the connection of the incoming cable 4 is completed, pull the second push-pull plate 34, the third spring 35 contracts the third slide bar 32 to slide at the front end of the second fixing frame 31, the third slide bar 32 drives the second pressure block 33 to slide, the lower end of the outgoing cable 5 passes through the second wire groove 13 and is inserted into the corresponding side of the second fixing frame 31 and the second pressure block 33, loosen the second push-pull plate 34, the third spring 35 extends the third slide bar 32 to slide at the front end of the second fixing frame 31, the third slide bar 32 drives the second pressure block 33 to slide, the second pressure block 33 is pressed to the outside of the outgoing cable 5, the connection of the outgoing cable 5 is completed, and it starts to be used. The line cable 4 and the first wiring member 9 are introduced into the voltage sensor 10, and the voltage sensor 10 detects the voltage. After the detection, the current is led out through the first plug rod 11, the second conductive member 16, the first conductive member 15, the second wiring member 14 and the outgoing cable 5. When the voltage sensor 10 detects that the voltage is abnormal, the electric adjustment telescopic rod 17 is operated to push the isolation plate 18 to move, and the isolation plate 18 is inserted into the inner side of the conductive plate 29 on the corresponding side of the first conductive member 15 and the second conductive member 16. The second sliding rod 28 and the limit plate 30 slide inside the slot 27, and the second spring 50 contracts. The isolation plate 18 is inserted into the inner side of the conductive plate 29 to complete the isolation of the first conductive member 15 and the second conductive member 16. During the isolation process, the helium tank 40 is opened, and the helium inside the helium tank 40 is introduced into the inside of the jet pipe 42 through the gas guide hose 41. The helium inside the jet pipe 42 is introduced into the inside of the power-off box 12 to extinguish the electric spark inside the power-off box 12.

[0030] exist Figure 1 , 2Among 4 and 8: Sliding sleeves 43 are provided on the rear sides of both the detection box 6 and the power-off box 12. The positioning member 1 includes a positioning plate 44. An installation track 45 is provided on the front side of the positioning plate 44. A support plate 46 is provided at the lower end position on the front side of the positioning plate 44. Installation frames 47 are provided on both sides at the upper end of the positioning plate 44. An adjusting screw 48 is provided at the front end of the installation frame 47. A baffle 49 is provided inside the adjusting screw 48. The sliding sleeve 43 slides at the outer position of the installation track 45. The outer end of the adjusting screw 48 rotates at the front end position of the installation frame 47. The inner end of the adjusting screw 48 rotates at the outer side of the baffle 49. The baffle 49 slides inside the installation frame 47 through the adjusting screw 48. The sliding sleeve 43 on the rear side of the detection box 6 slides to the outer side of the installation track 45, and the support plate 46 holds up the detection box 6. The sliding sleeve 43 on the rear side of the power-off box 12 slides to the outer side of the installation track 45, and the first insertion rod 11 is inserted into the slot 27 on the second conductive member 16. The outer end of the adjusting screw 48 rotates at the front end of the installation frame 47, the inner end of the adjusting screw 48 rotates at the outer side of the baffle 49, and the baffle 49 slides on the front side of the positioning plate 44. The baffle 49 slides to the upper side of the power-off box 12 to position the detection member 2 and the power-off member 3.

[0031] The working principle of the present invention is: first, pull the first push-pull plate 24, the first spring 25 contracts the first slide bar 22 to slide at the front end of the first fixed frame 20, the first slide bar 22 drives the first pressure block 23 to slide, and the upper end of the incoming cable 4 passes through the first wire groove 8 and is inserted into the corresponding side of the first fixed frame 20 and the first pressure block 23, loosen the first push-pull plate 24, the first spring 25 extends the first slide bar 22 to slide at the front end of the first fixed frame 20, the first slide bar 22 drives the first pressure block 23 to slide, and the first pressure block 23 is pressed to the outside of the incoming cable 4 to complete the connection of the incoming cable 4, pull the second push-pull plate 34, and the third spring 35 contracts the third slide bar 32 in the The front end of the second fixing frame 31 slides, and the third sliding rod 32 drives the second pressing block 33 to slide, and the lower end of the outgoing cable 5 passes through the second wire groove 13 and is inserted into the corresponding side of the second fixing frame 31 and the second pressing block 33, and the second push-pull plate 34 is loosened. The third spring 35 extends the third sliding rod 32 and slides at the front end of the second fixing frame 31. The third sliding rod 32 drives the second pressing block 33 to slide, and the second pressing block 33 is pressed to the outside of the outgoing cable 5 to complete the connection of the outgoing cable 5. Then, the sliding sleeve 43 on the rear side of the detection box 6 slides to the outside of the installation track 45, and the support plate 46 holds up the detection box 6. The sliding sleeve 43 on the rear side of the power-off box 12 slides to the outside of the installation track 45. The plug rod 11 is inserted into the slot 27 on the second conductive member 16, the outer end of the adjusting screw 48 rotates at the front end of the mounting frame 47, the inner end of the adjusting screw 48 rotates at the outer side of the baffle 49, the baffle 49 slides on the front side of the positioning plate 44, the baffle 49 slides to the upper side of the power-off box 12, and the detection member 2 and the power-off member 3 are positioned. Finally, it starts to be used, and the current is introduced into the voltage sensor 10 through the incoming cable 4 and the first wiring member 9. The voltage sensor 10 detects the voltage. After the detection, the current is led out through the first plug rod 11, the second conductive member 16, the first conductive member 15, the second wiring member 14 and the outgoing cable 5, and the voltage sensor 1 When voltage abnormality is detected, the electrically adjustable telescopic rod 17 operates to push the isolation plate 18 to move, and the isolation plate 18 is inserted into the inner side of the conductive plate 29 on the corresponding side of the first conductive member 15 and the second conductive member 16. The second sliding rod 28 and the limiting plate 30 slide inside the slot 27, and the second spring 50 contracts. The isolation plate 18 is inserted into the inner side of the conductive plate 29 to complete the isolation of the first conductive member 15 and the second conductive member 16. During the isolation process, the helium tank 40 is opened, and the helium inside the helium tank 40 is introduced into the inside of the jet pipe 42 through the gas guide hose 41. The helium inside the jet pipe 42 is introduced into the inside of the power-off box 12 to extinguish the electric spark inside the power-off box 12.

[0032] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0033] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power-off protection device for a switching power supply, comprising a positioning member (1), a detection member (2), a power-off member (3), an incoming line cable (4) and an outgoing line cable (5). The detection member (2) is located at the lower front position of the positioning member (1), the power-off member (3) is located above the detection member (2), the incoming line cable (4) is located at the lower end of the detection member (2), and the outgoing line cable (5) is located at the upper end of the power-off member (3). It is characterized in that, The detection component (2) includes a detection box (6). A first cover plate (7) is provided on the front side of the detection box (6). A first wire groove (8) is formed on the lower side of the detection box (6). A first wiring component (9) is arranged at the lower end inside the detection box (6). A voltage sensor (10) is arranged above the first wiring component (9). A first plugging rod (11) is arranged at the upper end of the voltage sensor (10). The power-off component (3) includes a power-off box (12). A second wire groove (13) is formed on the upper side of the power-off box (12). A second wiring component (14) is installed at the upper end inside the power-off box (12). A first conductive component (15) is arranged below the second wiring component (14). A second conductive component (16) is arranged at the lower end inside the power-off box (12). Electrically adjustable telescopic rods (17) are installed on both sides of the power-off box (12). A partition plate (18) is arranged at the inner end of the electrically adjustable telescopic rod (17). A fire-fighting component (19) is arranged on the front side of the power-off box (12).

2. The power-off protection device for a switching power supply according to claim 1, wherein, The first wiring member (9) includes a first fixing frame (20). A conductive wire (21) is provided at the rear end position on the upper side of the first fixing frame (20). A first sliding rod (22) is provided at the front end of the first fixing frame (20). A first pressing block (23) is provided at the rear side of the first sliding rod (22). A first pushing and pulling plate (24) is provided at the front side of the first sliding rod (22). A first spring (25) is provided at the outer side of the first sliding rod (22) at the corresponding side position between the first fixing frame (20) and the first pressing block (23). Both the first conductive member (15) and the second conductive member (16) include a positioning block (26). A slot (27) is formed inside the positioning block (26). A second sliding rod (28) is provided inside the slot (27). A conductive plate (29) is provided at the upper side of the second sliding rod (28). A limiting plate (30) is provided at the lower side of the second sliding rod (28). A second spring (50) is provided at the outer side of the second sliding rod (28) at the corresponding side position between the positioning block (26) and the conductive plate (29). The second wiring member (14) includes a second fixing frame (31). A third sliding rod (32) is provided at the front end of the second fixing frame (31). A second pressing block (33) is provided at the rear side of the third sliding rod (32). A second pushing and pulling plate (34) is provided at the front side of the third sliding rod (32). A third spring (35) is provided at the outer side of the third sliding rod (32) at the corresponding side position between the second fixing frame (31) and the second pressing block (33). A second plugging rod (36) is provided at the rear end position on the lower side of the second fixing frame (31). The fire-fighting member (19) includes a second cover plate (37). An installation groove (38) is formed at the front side of the second cover plate (37). A clamping clip (39) is provided inside the installation groove (38). A helium gas cylinder (40) is provided inside the clamping clip (39). A gas guide hose (41) is provided at one end of the helium gas cylinder (40). An air injection pipe (42) is installed at the inner side of the installation groove (38).

3. The power-off protection device for a switching power supply according to claim 1, characterized in that, Sliding sleeves (43) are provided at the rear sides of both the detection box (6) and the power-off box (12). The positioning member (1) includes a positioning plate (44). An installation track (45) is provided at the front side of the positioning plate (44). A support plate (46) is provided at the lower end position on the front side of the positioning plate (44). Installation frames (47) are provided at both upper end positions of the positioning plate (44). An adjusting screw rod (48) is provided at the front end of the installation frame (47). A baffle plate (49) is provided at the inner side of the adjusting screw rod (48).

4. A power-off protection device for a switching power supply according to claim 1, wherein, The upper end of the incoming cable (4) is electrically connected to the first wiring member (9), the output end of the first wiring member (9) is electrically connected to the input end of the voltage sensor (10), the output end of the voltage sensor (10) is electrically connected to the input end of the first plug rod (11), the output end of the first plug rod (11) is electrically connected to the input end of the second conductive member (16), the output end of the second conductive member (16) is electrically connected to the input end of the first conductive member (15), the output end of the first conductive member (15) is electrically connected to the input end of the second wiring member (14), and the output end of the second wiring member (14) is electrically connected to the input end of the outgoing cable (5).

5. The power-off protection device for a switching power supply according to claim 1, characterized in that The upper end of the incoming cable (4) slides inside the first wire groove (8), the lower end of the outgoing cable (5) slides inside the second wire groove (13), and the partition plate (18) slides inside the power-off box (12) through the electric adjustment telescopic rod (17).

6. The power-off protection device for a switching power supply according to claim 2, characterized in that, The first pressing block (23) slides inside the first fixing frame (20) through the first sliding rod (22). The upper end of the incoming cable (4) is located at the corresponding side position between the first fixing frame (20) and the first pressing block (23). The incoming cable (4) is electrically connected to the voltage sensor (10) through the conductive wire (21).

7. The power-off protection device for a switching power supply according to claim 2, wherein The lower end of the second sliding rod (28) slides inside the slot (27), the limiting plate (30) slides inside the slot (27), the conductive plate (29) slides above the positioning block (26) through the second sliding rod (28), and the first plug rod (11) slides inside the slot (27).

8. The power-off protection device for a switching power supply according to claim 2, characterized in that, The second pressing block (33) slides inside the second fixing frame (31) through the third sliding rod (32). The lower end of the outgoing cable (5) is located at the corresponding side position between the second fixing frame (31) and the second pressing block (33). The outgoing cable (5) is electrically connected to the second plug rod (36) through the second fixing frame (31). The second plug rod (36) slides inside the slot (27). The second fixing frame (31) is electrically connected to the first conductive member (15) through the second plug rod (36). The output end of the helium gas tank (40) is communicated with the input end of the air guide hose (41), the output end of the air guide hose (41) is communicated with the input end of the air spray pipe (42), and the output end of the air spray pipe (42) is communicated with the power-off box (12).

9. The power-off protection device for a switching power supply according to claim 3, characterized in that, The sliding sleeve (43) slides outside the installation track (45). The outer end of the adjusting screw rod (48) rotates at the front end position of the installation frame (47), and the inner end of the adjusting screw rod (48) rotates outside the baffle plate (49). The baffle plate (49) slides inside the installation frame (47) through the adjusting screw rod (48).

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