A driving power supply

Abstract

The present invention provides a driving power supply, which belongs to the technical field of electrical equipment. It solves the problem that the existing driving power supply has poor electrical connection stability and affects the service life. The driving power supply includes a shell, a pin fixed to the shell, a metal spring contacted and fixedly connected to the inner end of the pin, and a circuit board fixed in the shell. The metal spring has a sheet-like connecting pin extending to one side, the outer end of the connecting pin is bent upward to form a rest portion, and the rest portion is opposite to the side of the inner end of the pin. The circuit board is arranged along the length direction of the pin and is located between the inner end of the pin and the rest portion, and the rest portion rests on the side of the circuit board to form an electrical connection, and the edge of the circuit board presses the connecting pin against the shell. The electrical connection stability of the driving power supply is higher.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical equipment and relates to a driving power supply. Background Art

[0002] The driver power supply is a power converter that converts the power supply into a specific voltage and current to drive the LED to emit light. Therefore, there will be a circuit board inside the driver power supply, and a button for controlling the LED switch will be provided on the driver power supply casing. The button controls the on and off of the circuit on the circuit board. Two pins are also fixed on the casing for electrical connection to the socket, and the inner ends of the pins need to be electrically connected to the circuit board.

[0003] In order to facilitate disassembly and assembly, metal springs are usually used to electrically connect the pins and the circuit board. In order to ensure the abutment stability between the metal springs and the circuit board, as disclosed in the patent document (application number: 201020259768.8), the power conversion plug has a metal contact piece welded to the pin. The metal contact piece is U-shaped with the opening facing upward. The circuit board is inserted into the metal contact piece. The two ends of the metal contact piece clamp the circuit board to achieve electrical connection. Due to the symmetrical clamping of the metal contact piece, it has good connection stability. However, this structure requires the circuit board to be located directly above the pin, which has high requirements on the position of the circuit board, and thus has high requirements on the internal space layout of the shell.

[0004] In this regard, the connector disclosed in the patent document (application number: 201621222574.4) has a spring clip fixed to the pin, and the circuit board is set at the required position in the shell according to its own structure and spatial layout. The spring clip has a long connecting pin, which extends and searches for the circuit board, and then contacts the circuit board. The connecting pin of this structure is long, but there are the following problems: the pin is frequently plugged in and out during the use of the driving power supply, and it is easy to loosen or shake slightly after long-term use. The looseness or shaking will be transmitted to the connecting pin, causing the position of the connecting pin to move, affecting the contact stability, and the frequent movement of the connecting pin will wear the contacts of the circuit board, resulting in poor contact and reduced life.

[0005] Since the connecting pins of the metal shrapnel are elastic, their structural strength is weak and they are easy to change. Therefore, the longer connecting pins usually extend along the inner wall of the shell to the circuit board. Then, when the pins are loose or shaking and drive the connecting pins, it is easy to think of bending the connecting pins. At the same time, limiting grooves, limiting channels, etc. are set on the inner wall of the shell according to the path of the connecting pins to limit the connecting pins in the limiting channels. The bending point can limit the connecting pins in the length direction, and the limiting channels can limit the movement of the connecting pins in the width direction. However, this method can easily lead to a complex internal structure of the shell and increase processing costs. Summary of the Invention

[0006] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a driving power supply to solve the problem that the existing driving power supply has poor electrical connection stability and affects the service life.

[0007] The objectives of the present invention can be achieved through the following technical solutions: A driving power supply, comprising a shell, a pin fixed to the shell, a metal spring contacted and fixedly connected to the inner end of the pin, and a circuit board fixed in the shell, the metal spring having a sheet-like connecting pin extending to one side, the outer end of the connecting pin being bent upward to form a resting portion, characterized in that the resting portion is opposite to the side of the inner end of the pin, the circuit board is arranged along the length direction of the pin and is located between the inner end of the pin and the resting portion, and the resting portion rests on the side of the circuit board to form an electrical connection, and the edge of the circuit board presses the connecting pin against the shell.

[0008] The pin and the circuit board are both fixed to the shell, the metal spring is electrically connected to the pin, and the abutment is electrically connected to the circuit board. There is a distance between the pin and the abutment, and the edge of the circuit board presses the connecting foot part between the metal spring and the abutment against the shell, so that this part of the connecting foot is positioned. During long-term use, when the pin becomes slightly loose or shakes, it can only drive the connecting foot part connected to the pin on one side of the circuit board, while the connecting foot part on the other side of the circuit board will not be affected. That is, the compression of the circuit board can isolate the slight shaking of the pin from the abutment, thereby ensuring the abutment stability between the abutment and the circuit board. At the same time, when the circuit board is pressed down, the connecting foot on the other side of the circuit board has a tendency to curl up, and the curling of the connecting foot is converted into further compression of the circuit board by the abutment. This part of the compression force is the additional compression force generated by the downward pressure of the circuit board to increase the abutment stability between the abutment and the circuit board, and the stability of the abutment can prevent wear of the contacts on the circuit board, ensure the stability of the electrical connection, and thus improve the service life.

[0009] In the above-mentioned driving power supply, the inner bottom surface of the housing has a positioning boss protruding along the inner end direction of the plug pin, the edge end surface of the circuit board presses against the side surface of the connecting pin, and the other side surface of the connecting pin presses against the top surface of the positioning boss. The connecting pin needs to be pressed against the housing, so the connecting pin will also move relative to the circuit board due to the deformation of the housing. For this reason, a positioning boss is provided on the housing, and the connecting pin is pressed against the positioning boss to ensure strength. Even if the housing is deformed by external force, the entire positioning boss will only shift slightly as a whole. The circuit board and the abutting portion can still remain relatively still, ensuring the abutment stability of the two. The circuit board and the connecting pin, as well as the connecting pin and the positioning boss, are in surface contact, ensuring the stability of the pressed part of the connecting plate.

[0010] In the above-mentioned driving power supply, a clearance notch is provided on the top surface of the positioning boss. The clearance notch is located below the connecting pin, and the end surface of the lower edge of the circuit board is opposite to the clearance notch. The width of the connecting pin is smaller than the width of the clearance notch along the length direction of the lower edge of the circuit board. The clearance notch causes the portion of the connecting pin pressed down by the circuit board to be in a suspended state. Since the connecting pin has a certain thickness, when the edge of the circuit board is pressed against the connecting pin, there is a certain gap between the edge of the circuit board and the top surface of the positioning boss. Since the width of the connecting pin is smaller than the width of the clearance notch, the portion of the connecting pin opposite to the clearance notch has a tendency to further deform downward. According to the principle of leverage, the portion of the connecting pin on the other side of the circuit board has a tendency to tilt upward, thereby further pressing the abutting portion against the circuit board, increasing the pressing and abutting force between the two, and ensuring the stability of the abutment and electrical connection.

[0011] In the aforementioned driver power supply, the clearance notch extends along the length of the lower edge of the circuit board, extending through both sides of the positioning boss. The circuit board is secured by the housing, and the positioning boss is no longer constrained below, allowing the connecting foot to be pressed down as needed to ensure a firm contact force between the abutment portion and the circuit board.

[0012] In the aforementioned driving power supply, the positioning boss further includes a stopper protruding toward the inner end of the pin. The stopper defines a stopper slot on one side of the pin, with the bent portion of the connecting leg positioned within the stopper slot and abutting against the bottom surface of the slot. The abutment portion presses against the circuit board, exerting a reverse force on the upwardly bent portion of the connecting leg away from the circuit board. The stopper acts to limit the bent portion of the connecting leg, thereby ensuring the stability of the abutment between the abutment portion and the circuit board.

[0013] In the aforementioned driving power supply, the connecting pin includes a horizontal section that abuts the top surface of the positioning boss and a vertical section bent toward the inner end of the pin. The vertical section is located within the limiting groove, and its two straight edges abut against the two groove walls of the limiting groove. The free end of the vertical section bends toward the circuit board to form the aforementioned abutment portion, which is lower than the limiting portion. The circuit board is pressed against the horizontal section, and the vertical section is located within the limiting groove to ensure stability. The abutment portion is lower than the limiting portion, that is, the entire vertical section is limited by the limiting portion, ensuring stable contact between the abutment portion and the circuit board.

[0014] In the aforementioned driving power supply, the metal dome is circular, with its center portion arching in an arc toward the inner end of the pin. The positioning boss includes a truncated cone portion and a positioning portion located on one side of the truncated cone portion. The connecting foot rests on the top surface of the positioning portion, and the metal dome cap is positioned on the truncated cone portion and abuts against its outer edge. The arched metal dome assumes an umbrella shape, and the truncated cone portion radially positions the metal dome, ensuring its stability.

[0015] In the aforementioned driving power supply, the inner end of the pin passes through the conical portion and is fixedly connected to the conical portion. A connecting hole is defined in the middle of the metal spring, and a plurality of inwardly protruding claws are formed along the circumference of the connecting hole. The inner end of the pin passes through the connecting hole, and the claws are clamped onto the outer circumference of the inner end of the connecting pin. The conical portion increases the fixing area between the pin and the metal spring, ensuring the stability of the pin. The metal spring is abutted and fixed to the pin by the claws and electrically connected. The claws are deformable, so even if the pin experiences slight wobbling, the deformation of the claws can eliminate the overall impact on the metal spring. That is, the upper edge of the conical portion limits the upwardly arched metal spring, while the connecting hole provides space for slight wobbling of the pin, ensuring the stability of the metal spring, and thus ensuring the abutment stability between the abutment portion and the circuit board.

[0016] In the above-mentioned driving power supply, the inner end outer surface of the pin has a limiting conical surface with the small end facing the inner end of the pin, and the positioning boss is welded and fixedly connected to the limiting conical surface. The limiting conical surface is used to axially limit the pin to ensure the stability of the pin.

[0017] In the aforementioned driver power supply, the pins are hollow, with through-holes defined in the inner sidewalls of the pins. The housing is welded and fixedly connected to the pins, with the housing blank passing through the through-holes and filling the inner cavity of the pins. The housing is welded and fixedly connected to the pins during injection molding. During the injection molding process, molten plastic can flow through the through-holes and fill the inner cavity of the pins. The solidified plastic within the pins supports the pins, preventing deformation such as concavity and bending, thereby improving structural strength. The plastic within the pins is integrally connected to the housing through the through-holes, further strengthening the connection between the pins and the housing and increasing service life.

[0018] In the aforementioned driver power supply, the housing has an input interface at one end, with pins secured within the input interface. The pins and pins are located at opposite ends of the housing. A metal clip is also provided within the housing, clamped to the edge of the circuit board. The inner ends of the pins are securely connected to the clip, forming an electrical connection. The pins within the input interface connect to external circuitry for current output. Because the metal clip is clamped to the edge of the circuit board, the connection point with the pins is closer to the inner end face of the housing, allowing the pins to be shorter, saving metal material. The shorter inner ends of the pins also provide a more stable connection to the connector.

[0019] In the aforementioned driver power supply, the metal clip is bent into a U-shape, with inwardly protruding clamping portions formed on both sides of the metal clip. The end edges of the circuit board are inserted into the metal clip, and the two clamping portions of the metal clip are pressed against the two sides of the circuit board to form an electrical connection with the two sides of the circuit board. The metal clip is U-shaped and clamps the end edges of the circuit board, thereby ensuring a stable connection and facilitating assembly and disassembly.

[0020] In the aforementioned driver power supply, one side of the metal clip is bent to form a connecting piece that extends laterally. This connecting piece is provided with a socket, the edge of which is bent downward to form a snap-fit ​​portion. The inner end of the pin is cylindrical and inserted into the socket of the connecting piece, with the snap-fit ​​portion pressing against the outer circumference of the pin. The outer end of the pin extends out of the housing, and the input interface is arranged around the outer end of the pin. The connecting piece is closer to the inner end surface of the housing, shortening the inner end of the pin. The way the inner end of the pin is fixed to the connecting piece also facilitates assembly and disassembly.

[0021] In the aforementioned driving power supply, the input interface comprises a columnar portion and a cylindrical portion surrounding the columnar portion. The columnar portion defines a mounting hole, with the outer ends of the aforementioned pins positioned within the mounting hole. A protruding fixing portion is provided on the inner top surface of the housing, through which the inner ends of the pins pass and are fixedly connected. The connecting piece rests against the end surface of the fixing portion. The cylindrical portion and columnar portion are used to connect to external circuitry. The columnar portion protects the outer ends of the pins, and the fixing portion forms a fixed connection with the pins, stabilizing them and limiting the position of the connecting piece.

[0022] In the aforementioned driving power supply, the housing includes a hollow plug and a housing. One end of each of the plug and housing is closed. The pin is secured to the closed end of the plug, and the pin is secured to the closed end of the housing. The other ends of the plug and housing are open, and the open end of the plug and the open end of the housing are sealed and fixedly connected by ultrasonic welding. The plug and housing are each an integral structure, and their open ends are fixedly connected by ultrasonic welding, thereby improving the sealing and waterproof performance of the entire housing.

[0023] In the aforementioned driver power supply, a sealing groove is circumferentially defined on the open end surface of the plug, and a sealing ridge is circumferentially defined on the open end surface of the housing. The sealing ridge is embedded in the sealing groove and securely sealed therewith. The plug-in connection between the sealing ridge and the sealing groove increases the sealing area and improves sealing performance. Furthermore, the plug-in structure of the two also enhances connection stability.

[0024] Compared with the existing technology, this driving power supply has the following advantages:

[0025] 1. Since the lower edge of the circuit board presses the connecting pin portion between the metal spring and the abutting portion onto the housing, this portion of the connecting pin is positioned. During long-term use, when the pin becomes slightly loose or shakes, it can only drive the connecting pin portion connected to the pin on one side of the circuit board, while the connecting pin portion on the other side of the circuit board will not be affected. That is, the pressing of the circuit board can isolate the slight shaking of the pin from the abutting portion, thereby ensuring the abutment stability between the abutting portion and the circuit board.

[0026] 2. As the circuit board is pressed downward, the connecting pin on the other side of the circuit board tends to curl upward. The upward curl of the connecting pin is converted into further pressing of the abutting part on the circuit board to increase the abutting stability between the abutting part and the circuit board. The stability of the abutting part can avoid wear of the contacts on the circuit board, ensure the stability of the electrical connection, and thus improve the service life.

[0027] 3. Since the metal shrapnel is fixed against the pin and electrically connected by the claw, the claw has the ability to deform. Therefore, even if the pin shakes slightly, the overall impact on the metal shrapnel can be eliminated by the deformation of the claw. That is, the connecting hole provides space for the slight shaking of the pin, ensuring the stability of the metal shrapnel, and thus ensuring the stability of the abutment between the abutting part and the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the driving power supply.

[0029] Figure 2 This is a schematic diagram of the structure when the drive power supply housing and circuit board are not installed.

[0030] Figure 3 It is a schematic diagram of the structure of the matching between the pins, metal shrapnel and circuit board.

[0031] Figure 4 This is a bottom view of the structure of the driving power supply.

[0032] Figure 5 yes Figure 4 Structural cross-section view at AA in the middle.

[0033] Figure 6 yes Figure 5 A magnified view of the structure at point B.

[0034] Figure 7 yes Figure 5 Structural cross-section view at CC in the middle.

[0035] Figure 8 yes Figure 4 Structural cross-section view at DD in the middle.

[0036] Figure 9 It is a partial structural cross-sectional view of the upper part of the driving power supply.

[0037] In the figure, 1. shell; 11. positioning boss; 111. conical portion; 112. positioning portion; 113. limiting portion; 114. limiting groove; 115. clearance gap; 12. connector; 13. support body; 14. input interface; 141. columnar portion; 142. cylindrical portion; 143. mounting hole; 144. fixing portion; 15. plug; 151. sealing groove; 16. shell; 161. sealing ridge; 2. plug pin; 21. limiting cone surface; 22. through hole; 3. metal spring; 31. connecting pin; 311. horizontal section; 312. vertical section; 313. abutting portion; 32. connecting hole; 33. claw; 4. circuit board; 5. plug pin; 6. metal clip; 61. connecting piece; 62. connecting hole; 621. clamping portion; 63. clamping portion. DETAILED DESCRIPTION

[0038] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0039] Example 1:

[0040] like Figure 1 、 Figure 2 、 Figure 3 As shown, a driving power supply includes a housing 1, pins 2, metal shrapnel 3 and a circuit board 4. There are two pins 2. The direction limitation in this embodiment is described when the outer end of the pin 2 is facing downward. The housing 1 includes a hollow plug 15 and a shell 16. The plug 15 is located at the lower end and the shell 16 is located at the upper end. The lower end of the plug 15 is closed and the upper end is open. The upper end of the shell 16 is closed and the lower end is open. The upper end of the plug 15 and the lower end of the shell 16 are interlocked and sealed and fixed by ultrasonic welding. The inner bottom surface of the shell 16 is provided with two upwardly protruding positioning bosses 11. The inner ends of the two pins 2 extend upward into the shell 16 and pass through the two positioning bosses 11 respectively. The pins 2 are fixedly connected to the shell 16 and the positioning bosses 11. The circuit board 4 is fixed in the shell 1, and the board surface of the circuit board 4 is arranged in the vertical direction, that is, the circuit board 4 is arranged parallel to the pins 2. There are two metal springs 3 corresponding to the two pins 2 respectively. The metal springs 3 are circular, and the middle part of the metal springs 3 is arched upward. A connecting hole 32 is provided in the middle part of the metal spring 3. The aperture of the connecting hole 32 is larger than the outer diameter of the inner end of the pin 2. The inner end of the pin 2 passes through the connecting hole 32 upward. There are a number of sheet-like claws 33 protruding radially inward along the circumference of the edge of the connecting hole 32. The claws 33 are all bent upward and pressed against the outer circumference of the inner end of the pin 2, that is, the metal spring 3 is positioned with the pin 2 through the claws 33 to achieve electrical connection. Combination Figure 4 、 Figure 5 、 Figure 6When the cam 31 is in the unlocking state, the protrusion 314 is in the unlocking state, and the lock 31 is in the unlocking state, and the lock 31 is in the unlocking state, and the lock 31 is in the unlocking state.

[0041] Specifically, combined Figure 6 、 Figure 7 As shown, the positioning boss 11 includes a truncated cone portion 111 in a truncated cone shape and a positioning portion 112 located on one side of the truncated cone portion 111. The metal spring 3 is covered on the truncated cone portion 111, and the edge of the lower side surface of the metal spring 3 is located against the upper edge of the truncated cone portion 111. A clearance notch 115 is provided on the upper end surface of the positioning portion 112. The clearance notch 115 is located below the horizontal section 311, and the lower edge end surface of the circuit board 4 is directly opposite to the clearance notch 115. When the circuit board 4 is pressed, the lower side surface of the lower horizontal section 311 is abutted against the upper end surface of the positioning portion 112 on both sides of the clearance notch 115. A limiting portion 113 protruding upward is also provided on the upper end surface of the positioning portion 112. The clearance notch 115 is located between the truncated cone portion 111 and the limiting portion 113, the limiting portion 113 is in the shape of a rectangular block, and a limiting slot 114 is provided on the side surface of the limiting portion 113 facing the pin 2. The lower end of the limiting slot 114 extends to the upper end surface of the positioning portion 112, and the upper end passes through the upper end surface of the limiting portion 113. The horizontal section 311 extends into the lower end of the limiting slot 114, and the vertical section 312 is located in the limit. The side surface of the vertical section 312 is in contact with the bottom surface of the limiting slot 114, and the straight edges on both sides of the vertical section 312 are in contact with the two groove walls of the limiting slot 114 respectively, and the abutting portion 313 is lower than the upper end surface of the limiting portion 113, that is, the limiting slot 114 holds and limits the vertical section 312 and the abutting portion 313, so that the abutting portion 313 can stably abut against the circuit board 4.

[0042] Combine Figure 8As shown, the outer diameter of the inner end of the pin 2 is smaller than the outer diameter of the outer end, so that a limiting cone surface 21 with the small end facing upward is formed on the outer peripheral surface of the inner end of the pin 2, and the shell 16 is formed by injection molding. After injection molding, the positioning boss 11 is fused and fixedly connected to the outer peripheral surface of the pin 2 and the limiting cone surface 21. The pin 2 has a hollow thin-walled structure, and a through hole 22 is opened on the side wall of the inner end of the pin 2. The through hole 22 is located on the inner side of the positioning boss 11. During the injection molding process of the shell 16, the molten blank can flow into the inner cavity of the pin 2 through the through hole 22, so that after solidification, a connector 12 is formed in the through hole 22, and a support body 13 is formed in the pin 2. The outer peripheral surface of the connector 12 is fused and fixedly connected to the hole wall of the through hole 22, and the outer peripheral surface of the support body 13 is fused and fixedly connected to the inner side surface of the pin 2, and the shell 16, the positioning boss 11, the connector 12 and the support body 13 form an integrated structure.

[0043] Combine Figure 8 As shown, a sealing groove 151 is formed on the circumferential surface of the open end of the plug 15, and a sealing ridge 161 is formed on the circumferential surface of the open end of the housing 16. The sealing ridge 161 is embedded in the sealing groove 151 and is sealed and fixed by ultrasonic welding. Figure 9 As shown, the upper end of the shell 16 also has an input interface 14, and a pin 5 is fixedly inserted in the input interface 14. The outer end of the pin 5 is located outside the shell 16, and the input interface 14 is arranged around the outer end of the pin 5. The inner end of the pin 5 is cylindrical and extends into the interior of the shell 16. A metal clip 6 is also provided in the shell 16. The metal clip 6 is bent into a U shape, and inwardly protruding clamping portions 63 are formed on both sides of the metal clip 6. The upper edge of the circuit board 4 is inserted into the recess of the metal clip 6, and the two clamping portions 63 are pressed against the side surfaces of the circuit board 4 and form an electrical connection, that is, the metal clip 6 is buckled on the upper edge of the circuit board 4 and clamped, so that the two clamping portions 63 of the metal clip 6 respectively abut against the side surfaces of the upper edge of the circuit board 4 to achieve electrical connection, and a connecting piece 61 is bent and extended on the metal clip 6, and a plug hole 62 is opened on the connecting piece 61. The edge of the plug hole 62 is bent downward to form a tapered snap connection The outer wall of the inner end of the pin 5 is also provided with a barb for preventing it from falling off. The input interface 14 includes a columnar portion 141 and a cylindrical portion 142 arranged around the columnar portion. The columnar portion 141 is provided with a mounting hole 143. The outer end of the pin 5 is located in the mounting hole 143. A protruding fixing portion 144 is provided on the inner top surface of the shell 1. The inner end of the pin 5 passes through the fixing portion 144 and is fixedly connected to the fixing portion 144. The connecting piece 61 is abutted against the end surface of the fixing portion 144. Since the metal clip 6 is buckled on the upper edge of the circuit board 4, it is more convenient to disassemble and assemble. At the same time, it also makes the connecting piece 61 closer to the inner top surface of the top of the shell 1. The length of the inner end of the pin 5 can be shorter, saving the amount of metal material, and the shorter inner end of the pin 5 also makes the connection with the connecting piece 61 more stable.

[0044] Example 2:

[0045] The structure of the driving power supply is basically the same as that of the first embodiment, except that the clearance notch 115 passes through the two side surfaces of the positioning boss 11 along the length direction of the lower edge of the circuit board 4. The circuit board 4 is fixed by the housing 1, and the restriction of the positioning boss 11 is eliminated at the bottom, so that the connecting foot 31 can be pressed down as needed to ensure the pressing force between the abutting portion 313 and the circuit board 4.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0047] Although the terms housing 1, positioning boss 11, and truncated cone portion 111 are frequently used herein, the use of other terms is not excluded. These terms are used merely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A driving power supply, comprising a housing (1), a plug pin (2) fixed to the housing (1), a metal spring (3) contacting and fixedly connected to the inner end of the plug pin (2), and a circuit board (4) fixed in the housing (1), wherein the metal spring (3) has a sheet-shaped connecting pin (31) extending to one side, and the outer end of the connecting pin (31) is bent to form a supporting portion (313), characterized in that: The abutting portion (313) is opposite to the inner end side of the pin (2); the circuit board (4) is arranged along the length direction of the pin (2) and is located between the inner end of the pin (2) and the abutting portion (313); the abutting portion (313) abuts against the side of the circuit board (4) to form an electrical connection; the edge of the circuit board (4) presses the connecting pin (31) against the inner bottom surface of the housing (1).

2. The driving power supply according to claim 1, characterized in that: The inner bottom surface of the housing (1) is provided with a positioning boss (11) protruding along the inner end direction of the pin (2); the edge end surface of the circuit board (4) is pressed against the side surface of the connecting pin (31); and the other side surface of the connecting pin (31) is pressed against the top surface of the positioning boss (11).

3. The driving power supply according to claim 2, characterized in that: A clearance notch (115) is provided on the top surface of the positioning boss (11), the clearance notch (115) is located below the connecting foot (31), and the end surface of the lower edge of the circuit board (4) is opposite to the clearance notch (115), and the width of the connecting foot (31) is smaller than the width of the clearance notch (115) along the length direction of the lower edge of the circuit board (4).

4. The driving power supply according to claim 3, characterized in that: The clearance notch (115) penetrates both side surfaces of the positioning boss (11) along the length direction of the lower edge of the circuit board (4).

5. The driving power supply according to claim 2, 3 or 4, characterized in that: The positioning boss (11) also has a limiting portion (113) protruding along the inner end direction of the plug pin (2), and the limiting portion (113) is provided with a limiting groove (114) on one side facing the plug pin (2), and the bent portion of the connecting leg (31) is located in the limiting groove (114) and abuts against the bottom surface of the limiting groove (114).

6. The driving power supply according to claim 5, characterized in that: The connecting pin (31) comprises a horizontal section (311) abutting against the top surface of the positioning boss (11) and a vertical section (312) bent along the inner end direction of the pin (2), the vertical section (312) being located in the limiting groove (114), and the two straight edges of the vertical section (312) respectively abut against the two groove walls of the limiting groove (114), the free end of the vertical section (312) being bent toward one side of the circuit board (4) to form the above-mentioned abutting portion (313), and the abutting portion (313) being lower than the limiting portion (113).

7. The driving power supply according to claim 2, 3 or 4, characterized in that: The metal spring (3) is circular, and the middle part of the metal spring (3) is arched in an arc shape along the inner end direction of the pin (2). The positioning boss (11) includes a truncated cone portion (111) and a positioning portion (112) located on one side of the truncated cone portion (111). The connecting foot (31) is pressed against the top surface of the positioning portion (112). The metal spring (3) is covered on the truncated cone portion (111) and abuts against the outer edge of the truncated cone portion (111).

8. The driving power supply according to claim 7, characterized in that: The inner end of the plug pin (2) passes through the truncated cone portion (111) and is fixedly connected to the truncated cone portion (111). A connecting hole (32) is provided in the middle of the metal spring (3). The connecting hole (32) has a plurality of inwardly protruding claws (33) along the circumference. The inner end of the plug pin (2) passes through the connecting hole (32), and the plurality of claws (33) are clamped on the outer circumference of the inner end of the connecting pin (31).

9. The driving power supply according to claim 2, 3 or 4, characterized in that: The outer peripheral surface of the inner end of the plug pin (2) has a limiting conical surface (21) with the smaller end facing the inner end of the plug pin (2), and the positioning boss (11) is welded and fixedly connected to the limiting conical surface (21).

10. The driving power supply according to claim 9, characterized in that: The plug pin (2) has a hollow structure, and a through hole (22) is provided on the inner side wall of the plug pin (2). The shell (1) and the plug pin (2) are welded and fixedly connected, and the blank of the shell (1) passes through the through hole (22) and fills the inner cavity of the plug pin (2).

11. The driving power supply according to any one of claims 1 to 4, characterized in that: The end of the housing (1) is provided with an input interface (14), a pin (5) is fixed in the input interface (14), the pin (5) and the pin (2) are respectively located at the two ends of the housing (1), and a metal clip (6) is also provided in the housing (1), the metal clip (6) is clamped at the end edge of the circuit board (4), and the inner end of the pin (5) is fixedly connected to the metal clip (6) to form an electrical connection.

12. The driving power supply according to claim 11, characterized in that: The metal clip (6) is bent into a U-shape, and inwardly protruding clamping portions (63) are formed on both sides of the metal clip (6); the end edges of the circuit board (4) are inserted into the metal clip (6); the two clamping portions (63) of the metal clip (6) are respectively pressed against the two sides of the circuit board (4) and form an electrical connection with the two sides of the circuit board (4).

13. The driving power supply according to claim 12, characterized in that: One side of the metal clip (6) is bent to form a connecting piece (61) extending to the side, and a plug hole (62) is provided on the connecting piece (61). The edge of the plug hole (62) is bent downward to form a clamping portion (621). The inner end of the plug pin (5) is columnar, and the inner end of the plug pin (5) is plugged into the plug hole (62) of the connecting piece (61), and the clamping portion (621) is pressed against the outer peripheral surface of the plug pin (5). The outer end of the plug pin (5) extends out of the housing (1), and the input interface (14) is arranged around the outer end of the plug pin (5).

14. The driving power supply according to claim 13, characterized in that: The input interface (14) comprises a columnar portion (141) and a cylindrical portion (142) arranged around the columnar portion (141); a mounting hole (143) is provided on the columnar portion (141); the outer end of the plug pin (5) is located in the mounting hole (143); a protruding fixing portion (144) is provided on the inner top surface of the housing (1); the inner end of the plug pin (5) passes through the fixing portion (144) and is fixedly connected to the fixing portion (144); and the connecting piece (61) is abutted against the end surface of the fixing portion (144).

15. The driving power supply according to claim 11, characterized in that: The housing (1) comprises a hollow plug (15) and a shell (16), one end of each of the plug (15) and the shell (16) is closed, the pin (2) is fixed to the closed end of the plug (15), and the pin (5) is fixed to the closed end of the shell (16), the other ends of each of the plug (15) and the shell (16) are open, and the open end of the plug (15) and the open end of the shell (16) are sealed and fixedly connected by ultrasonic welding.

16. The driving power supply according to claim 15, characterized in that: A sealing groove (151) is circumferentially formed on the open end surface of the plug (15), and a sealing ridge (161) is circumferentially formed on the open end surface of the housing (16). The sealing ridge (161) is embedded in the sealing groove (151) and is sealed and fixedly connected.

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