A three-level DC-DC soft switching power supply structure in a power supply

Abstract

The present invention belongs to the technical field of power switches, and specifically, is a three-level DC-DC soft switching power supply structure in a power supply, comprising a rear cover plate and a cover plate, wherein a circuit board is provided on the surface of the rear cover plate; a base block is fixedly connected to the rear side of the terminal pin, a groove is provided on the upper surface of the base block, and a plurality of through grooves are evenly provided on one side of the groove, the through grooves corresponding to the terminal pins one by one, and an elastic plate is provided in each through groove, the elastic plate comprising a V-shaped portion and a connecting portion; the convex portion of the V-shaped portion points to the inner bottom surface of the groove, the fixed connecting portion of the V-shaped portion, the connecting portion obliquely downwardly penetrates the through groove and extends to the terminal pin; a plurality of power connection plates are evenly provided on the inner bottom surface of the groove, one end of the power connection plate is fixedly connected to the bottom of the V-shaped portion, the other end of the power connection plate penetrates the base block and is flatly fixed to the surface of the rear cover plate, and is electrically connected to the circuit board; one end of the cover plate is a closed end, and the other end of the cover plate is provided with a strip-shaped lower pressing plate, which fits into the groove.

Description

Technical Field

[0001] The present invention belongs to the technical field of power switches, in particular to a three-level DC-DC soft switching power supply structure in a power supply. Background Art

[0002] A switching power supply module is a modular package that packages discrete components on a switching power supply, thereby forming a smaller, higher-power-density module power supply. Its internal circuit is also a switching power supply. Switching power supplies can be divided into two categories: AC-DC and DC-DC. DC-DC converters are now modularized. DC-DC conversion converts a fixed DC voltage into a variable DC voltage, also known as DC chopping.

[0003] When designing a DC-DC soft-switching power supply, the wiring pins are generally located at one end of the rear cover to facilitate wire connection. However, current DC-DC soft-switching power supplies do not have internal power-off protection modules. Therefore, if the DC-DC soft-switching power supply remains energized during disassembly and maintenance, it could pose a safety hazard of electric shock to the workers.

[0004] To this end, the present invention provides a three-level DC-DC soft switching power supply structure in a power supply. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a three-level DC-DC soft switching power supply structure in a power supply described in the present invention includes a rear cover plate and a cover plate, a circuit board is provided on the surface of the rear cover plate, a row of threaded extruded connection pins are provided at one end of the surface of the rear cover plate, and the edge of the rear cover plate is fastened to the edge of the cover plate by screws; the rear side of the connection pins is fixedly connected to a base block, a groove is provided on the upper surface of the base block, and a plurality of through grooves are evenly provided on one side of the groove, the through grooves correspond to the connection pins one by one, and an elastic plate is provided in each through groove, and the elastic plate includes a V-shaped portion and a connecting portion; the convex portion of the V-shaped portion points to the inner bottom surface of the groove, and the fixed connecting portion of the V-shaped portion is inclined downward to pass through the through groove and extend to the connection pins; The inner bottom surface of the groove is evenly provided with multiple power connection plates, one end of which is fixedly connected to the bottom of the V-shaped portion, and the other end of which passes through the base block and is flatly fixed to the surface of the rear cover plate, and is electrically connected to the circuit board; one end of the cover plate is closed, and the other end of the cover plate is provided with a strip-shaped lower pressure plate, which fits into the groove; when designing a DC-DC soft switching power supply, the connection pins for the wires are generally set at one end of the rear cover plate to facilitate the connection of the wires. However, current DC-DC soft switching power supplies do not have an internal power-off protection module. Therefore, if the DC-DC soft switching power supply is always in a energized state during maintenance, it will pose a safety hazard of electric shock to the staff;

[0007] When the rear cover and the cover plate are buckled together, the lower pressure plate is embedded in the groove, and the lower surface of the lower pressure plate presses down the elastic plate, specifically on the V-shaped part. The raised part of the V-shaped part is squeezed on the power board in the groove, and the V-shaped part is electrically connected to the power board. At the same time, the V-shaped part is electrically connected to the terminal pin through the connecting part; when the staff disassembles and repairs the interior, they loosen and remove the screws on the edge of the rear cover plate, and then lift the cover plate. At this time, the lower pressure plate moves upward with the cover plate, and the lower pressure plate slides out of the groove and no longer presses down the V-shaped part. At this time, the elastic plate causes the V-shaped part to tilt upward due to its own elasticity, and the V-shaped part is electrically disconnected from the power board, and the entire circuit board is in a power-off state, thereby ensuring the safety of the staff's electrical work.

[0008] Preferably, the power connection plate includes a strip portion and an arc-shaped portion; the strip is horizontally laid on the surface of the rear cover plate, one end of the strip portion extends to the groove, and one end of the strip portion is symmetrically fixed with an arc-shaped portion, one edge of the two arc-shaped portions is fixed to the strip plate, and the other edge of the arc-shaped portion is arranged oppositely; the lower pressure plate presses down the V-shaped portion, and the opening angle of the V-shaped portion gradually increases. At the same time, the convex part of the V-shaped portion is pressed down on the arc-shaped portion, and the elasticity of the arc-shaped portion itself and the other edge of the arc-shaped portion are close to each other. The elastic deformation of the arc-shaped portion buffers the elastic deformation of the V-shaped portion, which helps to protect the V-shaped portion, that is, the downward pressure of the lower pressure plate on the V-shaped portion is shared by the deformation of the V-shaped portion and the deformation amount of the arc-shaped portion.

[0009] Preferably, a notch is provided on the other edge of one of the arc-shaped portions, and the notch is provided along the length direction of the arc-shaped portion, and the other edge of the other arc-shaped portion is adapted to the shape of the notch; during the process of the arc-shaped portion being pressed down by the V-shaped portion, the other edge of the other arc-shaped portion is embedded in the notch on the other edge of one of the arc-shaped portions, so that the other edges of the two arc-shaped portions are pressed against each other, limiting the downward bending deformation of the arc-shaped portion, and preventing the other edges of the two arc-shaped portions from being staggered up and down when the V-shaped portion presses down the arc-shaped portion, causing the arc-shaped portion to bend and deform beyond its normal deformation range, resulting in the arc-shaped portion gradually losing its elastic deformation, affecting the deformation of the V-shaped portion, or the convex part of the V-shaped portion, and failing to effectively electrically connect the arc-shaped portion.

[0010] Preferably, a push rod is provided on the bottom surface of the through groove, one end of the push rod is fixed at the fixed position of the V-shaped part and the connecting part, and the other end of the push rod is slidably connected to a sleeve provided on the bottom surface of the through groove through a spring, and the sleeve is fixed to the bottom surface of the through groove; by providing the push rod, and the push rod is slidably connected to the sleeve by the spring, when the V-shaped part presses down the arc-shaped part, the V-shaped part and the connecting part at the fixed position press the push rod, the push rod presses the spring and retracts into the sleeve, and when the lower pressure plate disengages from the V-shaped part, the push rod pushes up the elastic plate under the elastic force of the spring, so that the V-shaped part effectively disengages from the arc-shaped part, thereby disconnecting the power supply, that is, providing secondary protection for the electrical disconnection between the V-shaped part and the arc-shaped part, thereby ensuring the safety of the staff.

[0011] Preferably, an L-shaped through hole is provided on the base block at the top of the through slot, one end of the through hole is vertically connected to the through slot, the other end of the through hole is perpendicular to one side wall of the groove, and an L-shaped lifting rod is provided in the through hole; the vertical end of the lifting rod passes through the through hole and is fixed at the fixing position of the V-shaped portion and the connecting portion, the other end of the lifting rod passes through the groove, and the other end of the lifting rod is vertically fixed to a cross bar, the cross section of the cross bar is wedge-shaped, and the inclined surface of the cross bar is opposite to the notch of the groove; a plurality of rectangular slots are provided on the outer side wall of the lower pressure plate, and the slots are matched with the cross bar arrangement; The pressure plate is embedded in the groove, and the lower surface of the lower pressure plate presses down the V-shaped part. At the same time, the fixed connection point between the V-shaped part and the connecting part pulls down the lifting rod, and the lifting rod moves downward along the through hole. The other end of the lifting rod is squeezed on the side wall of the lower pressure plate, squeezing the lower pressure plate into the groove to ensure the stability of the lower pressure plate after being embedded in the groove. At the same time, the cross bar is embedded in the card slot to restrain the movement of the lower pressure plate, that is, the lifting rod, cross bar, lower pressure plate and V-shaped part form a closed loop self-locking, so that the lower pressure plate can be stably pressed down on the V-shaped part to ensure the electrical stability of the DC-DC soft switching power supply.

[0012] Preferably, the rear side wall of the vertical portion of the through hole is inclined inward; the rear surface of the vertical portion of the lifting rod is provided with a recess adapted to the shape of the rear side wall of the vertical portion of the through hole; when the lifting rod moves downward, the vertical portion of the lifting rod is squeezed on the vertical inclined portion of the through hole, so that the lifting rod has a tendency to move toward the direction of the downward pressure plate, increasing the squeezing force of the cross bar embedded in the slot on the slot, improving the stability of the cross bar after being embedded in the slot, thereby improving the downward pressure stability of the lower pressure plate on the V-shaped portion.

[0013] Preferably, a limit groove is provided on the lower surface of the lower pressure plate, and tentacles are symmetrically provided on both sides of the limit groove, one end of the tentacles is fixed to the lower surface position of the lower pressure plate, and the other end of the tentacles is protruding toward the limit groove; by setting the tentacles, the lower pressure plate presses down the V-shaped part, limiting the left and right displacement of the V-shaped part, so that the V-shaped part is confined in the limit groove, ensuring that the elastic plate can still maintain its stability after being pressed down many times, and at the same time, when the lower pressure plate is embedded in the groove, the tentacles press down the edge of the V-shaped part and are placed on the lower surface of the V-shaped part. When the lower pressure plate is lifted, the other end of the tentacles pulls up the V-shaped part, so that the V-shaped part is separated from the arc part, thereby once again ensuring the safety of the DC-DC soft switching power supply when it is disassembled and powered off.

[0014] Preferably, fixed guide plates are provided on both sides of the lower pressure plate, the guide plates are arranged perpendicular to the lower pressure plate, and the lower ends of the guide plates protrude from the lower surface of the lower pressure plate; guide grooves are opened on both sides of the base block, the depth of the guide grooves is greater than the depth of the grooves, and the guide grooves are matched with the guide plates; by setting the guide plates and the lower ends of the guide plates protruding from the lower surface of the lower pressure plate, after the lower pressure plate is embedded in the groove, the lower end of the guide plate is first embedded in the guide groove, and then the lower pressure plate is embedded in the groove, the slots on the side walls of the lower pressure plate can be accurately aligned with the cross bar, and after the lower pressure plate is completely embedded in the groove, the cross bar can be effectively embedded in the slot to prevent the lower pressure plate from being stuck in the groove.

[0015] Preferably, a plurality of fixing pins are fixed to the lower surface of the strip portion, and the fixing pins are embedded in the inner surface of the rear cover plate; by providing the fixing pins, the strip portion is stabilized on the surface of the rear cover plate to prevent the other end of the strip portion from tilting up when one end of the strip portion is pressed down.

[0016] Preferably, one end of the strip portion is vertically fixed to a limiting plate, the limiting plate is located on the inner side of the arc portion, and the limiting plate is built into the base block; by providing the limiting plate, the strip portion is stabilized in the base block, thereby improving the stability of the power board.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. In a three-level DC-DC soft-switching power supply structure in a power supply according to the present invention, when a worker disassembles and repairs the interior of the power supply, they loosen and remove the screws on the edge of the rear cover plate, then lift the cover plate upward. The lower pressure plate then moves upward along with the cover plate, sliding out of the groove and no longer pressing down on the V-shaped portion. The elastic plate then tilts the V-shaped portion upward due to its own elasticity, electrically disconnecting the V-shaped portion from the power board. This de-energizes the entire circuit board, thereby ensuring the safety of the worker's electrical work.

[0019] 2. In a three-level DC-DC soft-switching power supply structure in a power supply described in the present invention, a lower pressure plate presses down on the V-shaped portion, and the opening angle of the V-shaped portion gradually increases. At the same time, the convex portion of the V-shaped portion presses down on the arc-shaped portion. Due to the elasticity of the arc-shaped portion itself, the other edges of the arc-shaped portion approach each other, and the elastic deformation of the arc-shaped portion buffers the elastic deformation of the V-shaped portion, which helps to protect the V-shaped portion. That is, the downward pressure of the lower pressure plate on the V-shaped portion is distributed between the deformation of the V-shaped portion and the deformation amount of the arc-shaped portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a first-perspective perspective diagram of the DC-DC soft switching power supply structure of the present invention;

[0022] Figure 2 yes Figure 1 A partial enlarged view of the middle part;

[0023] Figure 3 This is a second perspective view of the DC-DC soft switching power supply structure of the present invention;

[0024] Figure 4 It is a three-dimensional diagram of the power board in the present invention;

[0025] Figure 5 It is a front view of the power board in the present invention;

[0026] Figure 6 This is a three-dimensional diagram of the cooperation between the lifting rod and the elastic plate in the present invention;

[0027] Figure 7 It is a side view of the DC-DC soft switching power supply structure of the present invention;

[0028] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle;

[0029] Figure 9 It is a diagram showing the coordination of the fixing pin and the strip portion in the present invention.

[0030] In the figure: rear cover 1, cover plate 2, connection pin 3, base block 4, groove 5, through groove 6, elastic plate 7, V-shaped portion 8, connecting portion 9, power board 10, lower pressure plate 11, strip portion 12, arc-shaped portion 13, notch 14, ejector pin 15, sleeve 16, through hole 17, lifting rod 18, cross bar 19, slot 20, recess 21, limit slot 22, feeler 23, guide plate 24, guide slot 25, fixing pin 26, limit plate 27. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] Example 1:

[0033] Reference Figure 1 、 Figure 2 and Figure 3A three-level DC-DC soft switching power supply structure in a power supply includes a rear cover plate 1 and a cover plate 2. A circuit board is provided on the surface of the rear cover plate 1. A row of threaded extruded connection pins 3 are provided at one end of the surface of the rear cover plate 1. The edge of the rear cover plate 1 is fastened to the edge of the cover plate 2 by screws; a base block 4 is fixed to the rear side of the connection pin 3. A groove 5 is provided on the upper surface of the base block 4. A plurality of through grooves 6 are evenly provided on one side of the groove 5. The through grooves 6 correspond to the connection pins 3 one by one. An elastic plate 7 is provided in each through groove 6. The elastic plate 7 includes a V-shaped portion 8 and a connecting portion 9. The raised portion of the V-shaped portion 8 The fixed connection part 9 of the V-shaped part 8 points to the inner bottom surface of the groove 5, and the connection part 9 is inclined downward to penetrate the through groove 6 and extend to the terminal pin 3; the inner bottom surface of the groove 5 is evenly provided with a plurality of power connection plates 10, one end of the power connection plate 10 is fixedly connected to the bottom of the V-shaped part 8, and the other end of the power connection plate 10 passes through the base block 4 and is flatly fixed to the surface of the rear cover plate 1 and electrically connected to the circuit board; one end of the cover plate 2 is a closed end, and the other end of the cover plate 2 is provided with a strip-shaped lower pressure plate 11, which is matched with the groove 5; when designing a DC-DC soft switching power supply, the access plate 10 is generally The connection pin 3 of the wire is set at one end of the rear cover 1 to facilitate the connection of the wire. However, the current DC-DC soft switching power supply does not have a power-off protection module inside. Therefore, when the staff disassembles it for maintenance, if the DC-DC soft switching power supply is always in a live state, it will cause a safety hazard of electric shock to the staff; when the rear cover 1 and the cover plate 2 are buckled together, the lower pressure plate 11 is embedded in the groove 5, and the lower surface of the lower pressure plate 11 presses down the elastic plate 7, specifically on the V-shaped portion 8, and the convex part of the V-shaped portion 8 is squeezed on the power connection plate 10 in the groove 5. , the V-shaped portion 8 is electrically connected to the power board 10, and the V-shaped portion 8 is electrically connected to the terminal pin 3 through the connecting portion 9; when the staff disassembles and repairs the interior, they loosen the screws on the edge of the rear cover plate 1 and remove them, and then lift the cover plate 2. At this time, the lower pressure plate 11 moves upward with the cover plate 2, and the lower pressure plate 11 slides off the groove 5 and no longer presses down the V-shaped portion 8. At this time, the elastic plate 7 causes the V-shaped portion 8 to tilt upward due to its own elasticity, and the V-shaped portion 8 is electrically disconnected from the power board 10, and the entire circuit board is in a power-off state, thereby ensuring the safety of the staff's electrical work.

[0034] Reference Figure 4 and Figure 5The power connection plate 10 includes a strip portion 12 and an arc-shaped portion 13; the strip is horizontally laid on the surface of the rear cover plate 1, one end of the strip portion 12 extends to the groove 5, and one end of the strip portion 12 is symmetrically fixed with an arc-shaped portion 13, one edge of the two arc-shaped portions 13 is fixed to the strip plate, and the other edge of the arc-shaped portion 13 is arranged oppositely; the lower pressing plate 11 presses down the V-shaped portion 8, and the opening angle of the V-shaped portion 8 gradually increases. At the same time, the convex part of the V-shaped portion 8 is pressed down on the arc-shaped portion 13. The elasticity of the arc-shaped portion 13 itself and the other edges of the arc-shaped portion 13 are close to each other. The elastic deformation of the arc-shaped portion 13 buffers the elastic deformation of the V-shaped portion 8, which helps to protect the V-shaped portion 8, that is, the downward pressure of the lower pressing plate 11 on the V-shaped portion 8 is shared between the deformation of the V-shaped portion 8 and the deformation of the arc-shaped portion 13.

[0035] Reference Figure 5 , a notch 14 is provided on the other edge of one of the arc-shaped portions 13, and the notch 14 is provided along the length direction of the arc-shaped portion 13, and the other edge of the other arc-shaped portion 13 is adapted to the shape of the notch 14; when the arc-shaped portion 13 is pressed down by the V-shaped portion 8, the other edge of the other arc-shaped portion 13 is embedded in the notch 14 on the other edge of one of the arc-shaped portions 13, so that the other edges of the two arc-shaped portions 13 are pressed against each other, limiting the downward bending deformation of the arc-shaped portion 13, and preventing the other edges of the two arc-shaped portions 13 from interlacing up and down when the V-shaped portion 8 presses down the arc-shaped portion 13, so that the bending deformation of the arc-shaped portion 13 exceeds its normal deformation range, causing the arc-shaped portion 13 to gradually lose its elastic deformation, affecting the deformation of the V-shaped portion 8, or the convex part of the V-shaped portion 8, and failing to effectively electrically connect the arc-shaped portion 13.

[0036] Reference Figure 2 and Figure 6 The bottom surface of the through groove 6 is provided with a push rod 15, one end of the push rod 15 is fixed at the fixed position of the V-shaped portion 8 and the connecting portion 9, and the other end of the push rod 15 is slidably connected to the sleeve 16 provided on the bottom surface of the through groove 6 by a spring, and the sleeve 16 is fixed to the bottom surface of the through groove 6; by providing the push rod 15, and the push rod 15 is slidably connected to the sleeve 16 up and down by the spring, when the V-shaped portion 8 presses the arc-shaped portion 13 down, the V-shaped portion 8 and the connecting portion 9 fixed position press the push rod 15 down, the push rod 15 presses the spring and retracts into the sleeve 16, when the lower pressure plate 11 disengages from the V-shaped portion 8, the push rod 15 pushes up the elastic plate 7 under the elastic force of the spring, so that the V-shaped portion 8 is effectively disengaged from the arc-shaped portion 13, thereby disconnecting the power supply, that is, providing secondary protection for the electrical disconnection of the V-shaped portion 8 and the arc-shaped portion 13, thereby ensuring the safety of the staff.

[0037] Reference Figure 2 and Figure 3, an L-shaped through hole 17 is provided on the base block 4 at the top of the through slot 6, one end of the through hole 17 is vertically connected to the through slot 6, and the other end of the through hole 17 is perpendicular to one side wall of the groove 5, and an L-shaped lifting rod 18 is provided in the through hole 17; the vertical end of the lifting rod 18 passes through the through hole 17 and is fixed at the fixed position of the V-shaped portion 8 and the connecting portion 9, the other end of the lifting rod 18 passes through the groove 5, and the other end of the lifting rod 18 is vertically fixed with a cross bar 19, the cross section of the cross bar 19 is wedge-shaped, and the inclined surface of the cross bar 19 is opposite to the notch of the groove 5; a plurality of rectangular slots 20 are provided on the outer side wall of the lower pressing plate 11, and the slots 20 are arranged in conjunction with the cross bar 19; the lower pressing plate 11 The plate 11 is embedded in the groove 5, and the lower surface of the lower pressure plate 11 presses down the V-shaped part 8. At the same time, the fixed connection point between the V-shaped part 8 and the connecting part 9 pulls down the lifting rod 18, and the lifting rod 18 moves downward along the through hole 17. The other end of the lifting rod 18 is squeezed on the side wall of the lower pressure plate 11, squeezing the lower pressure plate 11 into the groove 5, ensuring the stability of the lower pressure plate 11 after being embedded in the groove 5. At the same time, the cross bar 19 is embedded in the card slot 20, which also constrains the movement of the lower pressure plate 11, that is, the lifting rod 18, the cross bar 19, the lower pressure plate 11 and the V-shaped part 8 form a closed loop self-locking, so that the lower pressure plate 11 can be stably pressed down on the V-shaped part 8, thereby ensuring the electrical stability of the DC-DC soft switching power supply.

[0038] Reference Figure 2 and Figure 6 The rear side wall of the vertical part of the through hole 17 is inclined inward; the rear surface of the vertical part of the lifting rod 18 is provided with a recess 21 adapted to the shape of the rear side wall of the vertical part of the through hole 17; when the lifting rod 18 moves downward, the vertical part of the lifting rod 18 is squeezed on the vertical inclined part of the through hole 17, so that the lifting rod 18 has a tendency to move toward the downward pressure plate 11, increasing the squeezing force of the cross bar 19 embedded in the slot 20 on the slot 20, and improving the stability of the cross bar 19 after being embedded in the slot 20, thereby improving the downward pressure stability of the lower pressure plate 11 on the V-shaped part 8.

[0039] Reference Figure 7 and Figure 8The lower surface of the lower pressing plate 11 is provided with a limiting groove 22, and tentacles 23 are symmetrically provided on both sides of the limiting groove 22. One end of the tentacles 23 is fixed to the lower surface position of the lower pressing plate 11, and the other end of the tentacles 23 protrudes toward the limiting groove 22; by setting the tentacles 23, the lower pressing plate 11 presses down the V-shaped part 8, limiting the left and right displacement of the V-shaped part 8, so that the V-shaped part 8 is confined in the limiting groove 22, ensuring that the elastic plate 7 can still maintain its stability after being pressed down many times. At the same time, when the lower pressing plate 11 is embedded in the groove 5, the tentacles 23 press down the edge of the V-shaped part 8 and are placed on the lower surface of the V-shaped part 8. When the lower pressing plate 11 is lifted, the other end of the tentacles 23 pull up the V-shaped part 8, so that the V-shaped part 8 is separated from the arc part 13, once again ensuring the safety of the DC-DC soft switching power supply when it is disassembled and powered off.

[0040] Reference Figure 3 and Figure 7 , fixed guide plates 24 are provided on both sides of the lower pressing plate 11, and the guide plates 24 are arranged perpendicular to the lower pressing plate 11, and the lower ends of the guide plates 24 protrude from the lower surface of the lower pressing plate 11; guide grooves 25 are opened on both sides of the base block 4, the depth of the guide grooves 25 is greater than the depth of the groove 5, and the guide grooves 25 are matched with the guide plates 24; by providing the guide plates 24, and the lower ends of the guide plates 24 protrude from the lower surface of the lower pressing plate 11, so that after the lower pressing plate 11 is embedded in the groove 5, the lower end of the guide plate 24 is first embedded in the guide groove 25, and then the lower pressing plate 11 is embedded in the groove 5, and the slots 20 on the side walls of the lower pressing plate 11 can be accurately aligned with the cross bar 19. After the lower pressing plate 11 is completely embedded in the groove 5, the cross bar 19 can be effectively embedded in the slots 20 to prevent the lower pressing plate 11 from being stuck in the groove 5.

[0041] Example 2:

[0042] Reference Figure 9 , compared with Example 1, as another embodiment of the present invention, the lower surface of the strip portion 12 is fixed with multiple fixing pins 26, and the fixing pins 26 are embedded in the surface of the rear cover 1; by providing the fixing pins 26, the strip portion 12 is stabilized on the surface of the rear cover 1 to prevent the other end of the strip portion 12 from tilting up when one end of the strip portion 12 is pressed down.

[0043] One end of the strip portion 12 is vertically fixed to a limit plate 27 , which is located inside the arc portion 13 and is built into the base block 4 . By providing the limit plate 27 , the strip portion 12 is stabilized in the base block 4 , thereby improving the stability of the power board 10 .

[0044] Working principle: When the rear cover 1 and the cover plate 2 are buckled together, the lower pressure plate 11 is embedded in the groove 5, and the lower surface of the lower pressure plate 11 presses down the elastic plate 7, specifically on the V-shaped portion 8. The raised part of the V-shaped portion 8 is squeezed on the power board 10 in the groove 5, and the V-shaped portion 8 is electrically connected to the power board 10. At the same time, the V-shaped portion 8 is electrically connected to the terminal pin 3 through the connecting portion 9; when the staff disassembles and repairs the interior, they loosen the screws on the edge of the rear cover 1 and remove it, and then lift the cover plate 2. At this time, the lower pressure plate 11 moves upward together with the cover plate 2, and the lower pressure plate 11 slides off the groove 5 and no longer presses down the V-shaped portion 8. At this time, the elastic plate 7 causes the V-shaped portion 8 to tilt upward due to its own elasticity, and the V-shaped portion 8 is electrically disconnected from the power board 10. The entire circuit board is in a power-off state, thereby ensuring the safety of the staff's electrical work;

[0045] The lower pressing plate 11 presses down the V-shaped portion 8, and the opening angle of the V-shaped portion 8 gradually increases. At the same time, the convex part of the V-shaped portion 8 presses down on the arc-shaped portion 13. Due to the elasticity of the arc-shaped portion 13 itself, the other edges of the arc-shaped portion 13 are close to each other. The elastic deformation of the arc-shaped portion 13 buffers the elastic deformation of the V-shaped portion 8, which helps to protect the V-shaped portion 8. That is, the downward pressure of the lower pressing plate 11 on the V-shaped portion 8 is shared by the deformation of the V-shaped portion 8 and the deformation of the arc-shaped portion 13.

[0046] When the arc portion 13 is pressed downward by the V-shaped portion 8, the other edge of the other arc portion 13 is embedded in the notch 14 of the other edge of one of the arc portions 13, so that the other edges of the two arc portions 13 abut against each other, limiting the downward bending deformation of the arc portion 13. This prevents the other edges of the two arc portions 13 from interlacing with each other when the V-shaped portion 8 presses down the arc portion 13, causing the arc portion 13 to bend and deform beyond its normal deformation range, resulting in the arc portion 13 gradually losing its elastic deformation, affecting the deformation of the V-shaped portion 8, or causing the convex portion of the V-shaped portion 8 to fail to effectively electrically connect to the arc portion 13.

[0047] By providing a push rod 15, and the push rod 15 being connected to the sleeve 16 by sliding up and down through a spring, when the V-shaped portion 8 presses down the arc-shaped portion 13, the V-shaped portion 8 and the connecting portion 9 are fixed at the position pressing down the push rod 15, and the push rod 15 presses the spring and retracts into the sleeve 16. When the lower pressing plate 11 is separated from the V-shaped portion 8, the push rod 15 pushes up the elastic plate 7 under the elastic force of the spring, so that the V-shaped portion 8 is effectively separated from the arc-shaped portion 13, thereby disconnecting the power supply, that is, providing a secondary guarantee for the electrical disconnection between the V-shaped portion 8 and the arc-shaped portion 13, thereby ensuring the safety of the staff;

[0048] The lower pressing plate 11 is embedded in the groove 5, and the lower surface of the lower pressing plate 11 presses down the V-shaped portion 8. At the same time, the fixed connection point between the V-shaped portion 8 and the connecting portion 9 pulls down the lifting rod 18, and the lifting rod 18 moves downward along the through hole 17. The other end of the lifting rod 18 is squeezed on the side wall of the lower pressing plate 11, squeezing the lower pressing plate 11 into the groove 5, ensuring the stability of the lower pressing plate 11 after being embedded in the groove 5. At the same time, the cross bar 19 is embedded in the card slot 20, which also constrains the movement of the lower pressing plate 11, that is, the lifting rod 18, the cross bar 19, the lower pressing plate 11 and the V-shaped portion 8 form a closed loop self-locking, so that the lower pressing plate 11 can be stably pressed down on the V-shaped portion 8, thereby ensuring the electrical stability of the DC-DC soft switching power supply;

[0049] When the lifting rod 18 moves downward, the vertical portion of the lifting rod 18 is pressed against the vertically inclined portion of the through hole 17, so that the lifting rod 18 has a tendency to move toward the downward pressing plate 11, thereby increasing the squeezing force of the cross bar 19 embedded in the card slot 20 on the card slot 20, improving the stability of the cross bar 19 after being embedded in the card slot 20, thereby improving the downward pressing stability of the lower pressing plate 11 on the V-shaped portion 8;

[0050] By providing the feeler 23, the lower pressing plate 11 presses down the V-shaped portion 8, limiting the left and right displacement of the V-shaped portion 8, so that the V-shaped portion 8 is confined in the limiting groove 22, ensuring that the elastic plate 7 can still maintain its stability after being pressed down multiple times. At the same time, when the lower pressing plate 11 is embedded in the groove 5, the feeler 23 presses down the edge of the V-shaped portion 8 and is placed on the lower surface of the V-shaped portion 8. When the lower pressing plate 11 is lifted, the other end of the feeler 23 pulls up the V-shaped portion 8, so that the V-shaped portion 8 is separated from the arc portion 13, once again ensuring the safety of the DC-DC soft switching power supply when it is disassembled and powered off;

[0051] By setting the guide plate 24 and the lower end of the guide plate 24 protruding from the lower surface of the lower pressure plate 11, after the lower pressure plate 11 is embedded in the groove 5, the lower end of the guide plate 24 is first embedded in the guide groove 25, and then the lower pressure plate 11 is embedded in the groove 5. The slot 20 on the side wall of the lower pressure plate 11 can be accurately aligned with the cross bar 19. After the lower pressure plate 11 is completely embedded in the groove 5, the cross bar 19 can be effectively embedded in the slot 20 to prevent the lower pressure plate 11 from being stuck in the groove 5.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0053] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-level DC-DC soft switching power supply structure in a power supply, comprising a rear cover plate (1) and a cover plate (2), wherein a circuit board is provided on the surface of the rear cover plate (1), a row of threaded extruded connection pins (3) is provided on one end of the surface of the rear cover plate (1), and an edge of the rear cover plate (1) is fastened to an edge position of the cover plate (2) by screws; characterized in that: The rear side of the connecting pin (3) is fixedly connected to a base block (4), a groove (5) is provided on the upper surface of the base block (4), a plurality of through grooves (6) are evenly provided on one side of the groove (5), the through grooves (6) correspond to the connecting pins (3) one by one, and an elastic plate (7) is provided in each through groove (6), the elastic plate (7) includes a V-shaped portion (8) and a connecting portion (9); the convex portion of the V-shaped portion (8) points to the inner bottom surface of the groove (5), one edge of the V-shaped portion (8) is fixedly connected to the connecting portion (9), and the connecting portion (9) is inclined toward The bottom of the groove (5) is penetrated by the through groove (6) and extends to the connecting pin (3); a plurality of power connection plates (10) are evenly provided on the inner bottom surface of the groove (5), one end of the power connection plate (10) is arranged below the V-shaped portion (8), and the other end of the power connection plate (10) passes through the base block (4) and is flatly fixed to the surface of the rear cover plate (1) and electrically connected to the circuit board; one end of the cover plate (2) is a closed end, and the other end of the cover plate (2) is provided with a strip-shaped lower pressing plate (11), and the lower pressing plate (11) is matched with the groove (5); The lower surface of the lower pressing plate (11) presses down the V-shaped portion (8), and the raised portion of the V-shaped portion (8) is pressed onto the power connection plate (10), so that the V-shaped portion (8) is electrically connected to the power connection plate (10); The lower pressing plate (11) moves upward, the lower pressing plate (11) slides off the groove (5), the lower pressing plate (11) no longer presses down the V-shaped portion (8), and the V-shaped portion (8) tilts upward and is electrically disconnected from the power connection plate (10).

2. The three-level DC-DC soft switching power supply structure in a power supply according to claim 1, characterized in that: The power connection plate (10) comprises a strip portion (12) and an arc portion (13); the strip portion (12) is horizontally laid on the surface of the rear cover plate (1), one end of the strip portion (12) extends to the groove (5), and one end of the strip portion (12) is symmetrically fixed with the arc portion (13), one edge of the two arc portions (13) is fixed to the strip portion (12), and the other edges of the arc portions (13) are arranged opposite to each other.

3. The three-level DC-DC soft switching power supply structure in a power supply according to claim 2, characterized in that: A notch (14) is provided on the other edge of one of the arc-shaped portions (13), the notch (14) being provided along the length direction of the arc-shaped portion (13), and the other edge of the other arc-shaped portion (13) is adapted in shape to the notch (14).

4. The three-level DC-DC soft switching power supply structure in a power supply according to claim 1, characterized in that: The inner bottom surface of the through slot (6) is provided with a push rod (15), one end of the push rod (15) is fixed to the fixed position of the V-shaped portion (8) and the connecting portion (9), and the other end of the push rod (15) is slidably connected to a sleeve (16) provided on the inner bottom surface of the through slot (6) through a spring, and the sleeve (16) is fixed to the inner bottom surface of the through slot (6).

5. The three-level DC-DC soft switching power supply structure in a power supply according to claim 4, characterized in that: An L-shaped through hole (17) is provided on the base block (4) at the top of the through groove (6), one end of the through hole (17) is vertically connected to the through groove (6), and the other end of the through hole (17) is perpendicular to the side wall of one side of the groove (5), and an L-shaped lifting rod (18) is provided in the through hole (17); the vertical end of the lifting rod (18) passes through the through hole (17) and is fixed at the fixed position of the V-shaped portion (8) and the connecting portion (9), the other end of the lifting rod (18) passes through the groove (5), and the other end of the lifting rod (18) is vertically fixed to a cross bar (19), the cross section of the cross bar (19) is wedge-shaped, and the inclined surface of the cross bar (19) is opposite to the notch of the groove (5); a plurality of rectangular slots (20) are provided on the outer wall of the lower pressure plate (11), and the slots (20) are arranged to cooperate with the cross bar (19).

6. The three-level DC-DC soft switching power supply structure in a power supply according to claim 5, characterized in that: The rear side wall of the vertical portion of the through hole (17) is tilted inwardly; and the rear surface of the vertical portion of the lifting rod (18) is provided with a recess (21) adapted to the shape of the rear side wall of the vertical portion of the through hole (17).

7. The three-level DC-DC soft switching power supply structure in a power supply according to claim 5, characterized in that: A limiting groove (22) is provided on the lower surface of the lower pressing plate (11), and tentacles (23) are symmetrically provided on both sides of the limiting groove (22), one end of the tentacles (23) is fixed to the lower surface of the lower pressing plate (11), and the other end of the tentacles (23) is protruding toward the limiting groove (22).

8. The three-level DC-DC soft switching power supply structure in a power supply according to claim 7, characterized in that: Fixed guide plates (24) are provided on both sides of the lower pressing plate (11), the guide plates (24) are arranged perpendicular to the lower pressing plate (11), and the lower ends of the guide plates (24) protrude from the lower surface of the lower pressing plate (11); guide grooves (25) are provided on both sides of the base block (4), the depth of the guide grooves (25) is greater than the depth of the grooves (5), and the guide grooves (25) are matched with the guide plates (24).

9. The three-level DC-DC soft switching power supply structure in a power supply according to claim 2, characterized in that: A plurality of fixing pins (26) are fixedly connected to the lower surface of the strip portion (12), and the fixing pins (26) are embedded inside the surface of the rear cover plate (1).

10. The three-level DC-DC soft switching power supply structure in a power supply according to claim 9, characterized in that: One end of the strip portion (12) is vertically fixed to a limiting plate (27), the limiting plate (27) is located inside the arc portion (13), and the limiting plate (27) is built into the base block (4).

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