Power adapter

Abstract

The utility model discloses a power adapter which comprises a circuit board, an AC folding pin and a conductive assembly. The conductive assembly comprises a first conductive part, a second conductive part and a nickel strap; the first end of the first conductive part is connected with the conductive end of the circuit board; the first end of the second conductive part is connected with the fixed end of the AC folding pin; one end of the nickel strap is connected with the second end of the first conductive part, and the other end of the nickel strap is connected with the second end of the second conductive part. According to the utility model, the conductive connection structure of the AC folding pin is optimized, so that the production difficulty of the folding pin is reduced, and the production efficiency of products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic product adapter technical field especially relates to a power adapter. BACKGROUND

[0002] The power adapter is a kind of power conversion equipment, it is converted into the direct current or low voltage alternating current required by electronic equipment by internal circuit to the input alternating current, to meet the power supply demand of electronic equipment. With the development of the portability and miniaturization of electronic equipment, to meet the use demand of user in different scenes, many power adapters adopt the design of folding pin.

[0003] In the design of power adapter, the conductive connection mode of AC (alternating current) folding pin mainly includes wire tin soldering and fixed spring piece. Among them, the mode of wire tin soldering can realize conductive connection, but the tin soldering process cost is higher, and it is difficult to realize automatic production, leading to low production efficiency;And tin soldering quality is greatly influenced by worker's operation level, and it is easy to appear the situation of poor welding. In addition, the assembly and wiring process inside the wire are relatively complex, which is easy to cause cross short circuit, and then affect the electromagnetic compatibility (EMI) of product. And the mode of fixed spring piece can realize conductive connection, but the conductive spring piece of mould forming can only be applied to specific products and fixed position, and cannot be used as standard parts. When the volume or size of product changes, it is necessary to re-open hardware stamping forming die, which increases development cost and production cycle. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a power adapter, which optimizes the conductive connection structure of AC folding pin, to reduce the production difficulty of product and improve the production efficiency of product.

[0005] To solve the above technical problems, the utility model adopts the technical scheme that

[0006] A power adapter, comprising a circuit board, an AC folding pin and a conductive assembly;

[0007] The conductive assembly comprises a first conductive piece, a second conductive piece and a nickel strip;

[0008] The first end of the first conductive piece is connected with the conductive end of the circuit board;

[0009] The first end of the second conductive piece is connected with the fixed end of the AC folding pin;

[0010] One end of the nickel strip is connected with the second end of the first conductive piece, and the other end of the nickel strip is connected with the second end of the second conductive piece.

[0011] Further, it further comprises a plastic pressing piece.

[0012] The plastic pressing member is provided with a first cavity and a second cavity;

[0013] The first conductive member is arranged in the first cavity;

[0014] The second conductive member is arranged in the second cavity;

[0015] The nickel strip is attached to the connecting surface between the first cavity and the second cavity.

[0016] Further, the first conductive member comprises a flat portion;

[0017] The opposite ends of the flat portion are respectively bent in opposite directions along the same side to form two elastic arm portions in inverted U-shaped structure, and the flat portion is connected to one end of the nickel strip;

[0018] The conductive end of the circuit board is inserted between the two elastic arm portions, so that the conductive end of the circuit board abuts against the two elastic arm portions.

[0019] Further, the plastic pressing member is provided with a window in the region opposite to the elastic arm portions, so that the conductive end of the circuit board is inserted between the two elastic arm portions through the window.

[0020] Further, the plastic pressing member is provided with a groove communicating with the first cavity, and the side of the flat portion opposite to the groove is provided with a protrusion, and the groove and the protrusion are clamped.

[0021] Further, the second conductive member comprises a connecting portion;

[0022] The first end of the connecting portion is provided with two first elastic sheets parallel to each other in a first direction;

[0023] One of the first elastic sheets is connected to the fixed end of the AC folding pin, and the nickel strip is connected to the end of the connecting portion away from the first elastic sheet.

[0024] Further, the second end of the connecting portion opposite to the first end is provided with two second elastic sheets parallel to each other in a second direction;

[0025] The first direction and the second direction are collinear and opposite;

[0026] One of the second elastic sheets is connected to the nickel strip.

[0027] Further, the circuit board comprises a first PCB board, a second PCB board, a third PCB board and a fourth PCB board;

[0028] The first side and the second side of the first PCB board are detachably connected with the second PCB board and the third PCB board respectively;

[0029] The third side and the fourth side of the fourth PCB board are detachably connected with the second PCB board and the third PCB board respectively.

[0030] The first end of the first conductive part is connected with the conductive end of the fourth PCB board.

[0031] The first PCB board and the second PCB board abut each other, so that the first PCB board, the second PCB board, the third PCB board and the fourth PCB board form a cuboid structure.

[0032] Further, the first side and the second side of the first PCB board are respectively provided with first tenons, the second PCB board and the third PCB board are both provided with first through holes, and the first tenons are clamped with the first through holes.

[0033] The third side and the fourth side of the fourth PCB board are respectively provided with second tenons, the second PCB board and the third PCB board are both provided with second through holes, and the second tenons are clamped with the second through holes.

[0034] Further, the utility model also comprises a shell.

[0035] The circuit board, the conductive assembly and the AC folding pin are arranged in the accommodating space in the shell.

[0036] The shell and the AC folding pin are provided with a through port in the opposite area, so that the AC folding pin can be extended or retracted relative to the shell.

[0037] The utility model discloses the beneficial effect lies in: through first conductive part and second conductive part connect circuit board and AC folding pin respectively, then based on nickel band cross connects first conductive part and second conductive part, realizes the conductive connection between AC folding pin and circuit board, compared with traditional wire tin soldering or fixed spring piece mode, the connection mode of nickel band and conductive part is simple, need not tin soldering operation, effectively avoids the poor conductivity problem caused by unstable tin soldering quality, and nickel band can adjust length according to the volume of product, need not to develop mould again, effectively reduces production cost. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is an internal structure schematic view of power adapter provided by the utility model embodiment;

[0039] Figure 2 An assembly structure schematic view of the plastic pressing piece is provided for the embodiment of the utility model;

[0040] Figure 3 A bottom structure schematic view of the plastic pressing piece is provided for the embodiment of the utility model;

[0041] Figure 4 A structure schematic view of the shell is provided for the embodiment of the utility model;

[0042] Figure 5 A structure schematic view of the first conductive piece is provided for the embodiment of the utility model;

[0043] Figure 6 A structure schematic view of the circuit board and the first conductive piece is provided for the embodiment of the utility model;

[0044] Figure 7 A structure schematic view of the plastic pressing piece and the circuit board is provided for the embodiment of the utility model;

[0045] Figure 8 A groove structure schematic view of the plastic pressing piece is provided for the embodiment of the utility model;

[0046] Figure 9 A structure schematic view of the second conductive piece is provided for the embodiment of the utility model;

[0047] Figure 10 A structure schematic view of the circuit board is provided for the embodiment of the utility model;

[0048] Figure 11 A back view of the circuit board is provided for the embodiment of the utility model;

[0049] Label explanation:

[0050] 1, circuit board; 11, first PCB board; 12, second PCB board; 13, third PCB board; 14, fourth PCB board; 111, first tenon; 121, first through hole; 122, second through hole; 141, second tenon; 2, AC folding pin;

[0051] 3, conductive assembly; 31, first conductive piece; 32, second conductive piece; 33, nickel strip; 311, plane part; 312, elastic arm part; 313, protruding part; 321, connecting part; 322, first elastic sheet; 323, second elastic sheet; 324, extension section;

[0052] 4, plastic pressing piece; 41, first cavity; 42, second cavity; 43, third cavity;

[0053] 5, shell; 51, through port; 6, pin shell; 44, window; 45, groove. DETAILED DESCRIPTION

[0054] In order to make the technical contents, purposes and effects of the utility model clear, the following will be described in combination with the embodiments and the drawings.

[0055] The embodiment of the utility model provides a power adapter, including circuit board, AC folding pin and conductive component,

[0056] The conductive component includes first conductive piece, second conductive piece and nickel band,

[0057] The first end of the first conductive piece is connected with the conductive end of the circuit board,

[0058] The first end of the second conductive piece is connected with the fixed end of the AC folding pin,

[0059] One end of the nickel band is connected with the second end of the first conductive piece, and the other end of the nickel band is connected with the second end of the second conductive piece.

[0060] From the above description, the utility model has the beneficial effects that the first conductive piece and the second conductive piece are connected with the circuit board and the AC folding pin respectively, and then the nickel band is connected with the first conductive piece and the second conductive piece, realizing the conductive connection between the AC folding pin and the circuit board, compared with the traditional wire tin soldering or fixed spring piece mode, the connection mode of the nickel band and the conductive piece is simple, without tin soldering operation, effectively avoiding the poor conduction problem caused by unstable tin soldering quality, and the nickel band can adjust the length according to the volume of the product, without redeveloping the mold, effectively reducing the production cost. At the same time, the assembly structure of the conductive component is simple, effectively reducing the production difficulty of the folding pin and improving the product production efficiency.

[0061] Further, it further includes plastic pressing piece,

[0062] The plastic pressing piece is provided with a first cavity and a second cavity,

[0063] The first conductive piece is arranged in the first cavity,

[0064] The second conductive piece is arranged in the second cavity,

[0065] The nickel band is attached to the communication surface between the first cavity and the second cavity.

[0066] As can be known from the above description, the plastic pressing piece provides stable support and positioning for the first and second conductive pieces, so that the first and second conductive pieces can maintain accurate positional relationship during assembly, avoiding problems such as poor conductive contact caused by positional deviation, and enhancing the overall structural stability of the power adapter. Moreover, for products of different volumes, only the plastic pressing piece needs to be replaced to adjust the relative positions of the first and second conductive pieces, without the need to redevelop a mold, effectively reducing production costs.

[0067] Further, the first conductive piece includes a planar portion.

[0068] The planar portion is bent in opposite directions along the same side to form two elastic arm portions in inverted U-shaped structures, and the planar portion is connected to one end of the nickel strip.

[0069] The conductive end of the circuit board is inserted between the two elastic arm portions, so that the conductive end of the circuit board abuts against the two elastic arm portions.

[0070] As can be known from the above description, the planar portion of the first conductive piece can ensure the convenience of mounting the nickel strip, and the elastic arm portion structure is formed on the planar portion, so that the elastic arm portion structure can be tightly inserted with the conductive end of the circuit board, increasing the contact area and improving the reliability of the conductive connection, effectively avoiding conductive failure caused by poor contact.

[0071] Further, a window is arranged in the region opposite to the elastic arm portion of the plastic pressing piece, so that the conductive end of the circuit board is inserted into the space between the two elastic arm portions through the window.

[0072] As can be known from the above description, the window arranged on the plastic pressing piece provides a clear insertion channel for the conductive end of the circuit board, so that the conductive end of the circuit board can be accurately inserted into place, simplifying the assembly process, and tightly cooperating with the elastic arm portion, further enhancing the structural stability of the entire conductive assembly, ensuring the stability and reliability of the power adapter during use.

[0073] Further, a groove is arranged on the plastic pressing piece and communicates with the first cavity, a protrusion is arranged on the side of the planar portion opposite to the groove, and the groove and the protrusion are clamped.

[0074] As can be known from the above description, the groove on the plastic pressing piece and the protrusion of the first conductive piece are clamped, which can accurately position the position of the first conductive piece, so that the first conductive piece will not be displaced or loosened during assembly, improving the assembly accuracy and the stability of the entire conductive assembly. In addition, the clamping design increases the connection strength between the first conductive piece and the plastic pressing piece, so that the entire conductive assembly can remain stable when subjected to external force.

[0075] Further, the second conductive piece includes a connecting portion.

[0076] The first end of the connecting part is provided with two first elastic sheets parallel to each other in a first direction;

[0077] One of the first elastic sheets is connected to the fixed end of the AC folding pin, and the nickel strip is connected to one end of the connecting part away from the first elastic sheet.

[0078] As can be seen from the above description, the connecting part and the first elastic sheet structure of the second conductive part enable it to be closely connected to the fixed end of the AC folding pin and provide a certain deformation space for the AC folding pin, facilitating the folding and rotating operation of the AC folding pin. At the same time, stable conductive connection is achieved between the nickel strip and the first conductive part, improving the conductive performance and reliability of the power adapter.

[0079] Further, the second end of the connecting part opposite to the first end is provided with two second elastic sheets parallel to each other in a second direction;

[0080] The first direction is collinear and opposite to the second direction;

[0081] One of the second elastic sheets is connected to the nickel strip.

[0082] As can be seen from the above description, the second elastic sheet provided on the connecting part of the second conductive part further increases the contact points of the conductive connection, improves the flexibility and reliability of the conductive connection, and can effectively avoid conductive failure caused by poor contact.

[0083] Further, the circuit board includes a first PCB board, a second PCB board, a third PCB board, and a fourth PCB board;

[0084] The first side and the second side of the first PCB board opposite to each other are respectively detachably connected to the second PCB board and the third PCB board;

[0085] The third side and the fourth side of the fourth PCB board opposite to each other are respectively detachably connected to the second PCB board and the third PCB board;

[0086] The first end of the first conductive part is connected to the conductive end of the fourth PCB board;

[0087] The first PCB board abuts against the second PCB board, so that the first PCB board, the second PCB board, the third PCB board, and the fourth PCB board form a cuboid structure.

[0088] As can be seen from the above description, the circuit board is divided into four PCB boards (printed circuit boards) for detachable connection, making it more convenient and fast to repair or replace the PCB board without the need to disassemble the entire circuit board, thereby reducing the maintenance cost and difficulty.

[0089] Further, the first PCB board is provided with a first tenon on the opposite first side and second side respectively, the second PCB board and the third PCB board are provided with a first through hole respectively, and the first tenon is clamped with the first through hole;

[0090] The fourth PCB board is provided with a second tenon on the opposite third side and fourth side respectively, the second PCB board and the third PCB board are provided with a second through hole respectively, and the second tenon is clamped with the second through hole.

[0091] From the above description, it can be seen that the circuit board is divided into four pieces of PCB for tenon assembly, the angle and precision of assembly can be ensured without fixing jig, a regular cuboid structure is obtained, the assembly efficiency and quality of the PCB board are improved, and the assembly error caused by inaccurate jig positioning is reduced.

[0092] Further, the shell is further provided;

[0093] The circuit board, the conductive assembly and the AC folding pin are arranged in the accommodating space in the shell;

[0094] The shell and the AC folding pin are provided with a through port in the opposite area, so that the AC folding pin can be extended or retracted relative to the shell.

[0095] From the above description, it can be seen that the shell provides a stable accommodating space for the circuit board and the conductive assembly, so that they can maintain a fixed positional relationship during use, avoiding loosening or damage of the components caused by external impact or vibration, improving the overall structural stability and reliability of the power adapter. At the same time, the shell provides a storage space for the AC folding pin when it is retracted.

[0096] The embodiment of the power adapter provided by the utility model realizes the conductive connection between the AC folding pin and the circuit board by connecting the circuit board and the AC folding pin through the first conductive part and the second conductive part and crossing the first conductive part and the second conductive part based on the nickel belt, thereby reducing the production difficulty of the folding pin and improving the product production efficiency. The following will be explained through specific embodiments:

[0097] Please refer to Figures 1 to 11 The embodiment of the utility model is:

[0098] As Figure 1As shown in the figure, a power adapter includes a circuit board 1, an AC folding pin 2 and a conductive assembly 3. Among them, the conductive assembly 3 includes a first conductive part 31, a second conductive part 32 and a nickel strip 33; the first end of the first conductive part 31 is connected with the conductive end of the circuit board 1; the first end of the second conductive part 32 is connected with the fixed end of the AC folding pin 2; one end of the nickel strip 33 is connected with the second end of the first conductive part 31, and the other end of the nickel strip 33 is connected with the second end of the second conductive part 32. It should be noted that the nickel strip 33 is fixed on the first conductive part 31 and the second conductive part 32 by spot welding. In addition, since the AC folding pin 2 contains 2 pins, one conductive assembly 3 needs to be set for each pin, so the number of conductive assemblies 3 contained in one power adapter is 2.

[0099] As shown in the figure, Figure 2 and Figure 3 The power adapter also includes a plastic pressing piece 4. The plastic pressing piece 4 is provided with a first cavity 41 and a second cavity 42; the first conductive part 31 is arranged in the first cavity 41; the second conductive part 32 is arranged in the second cavity 42; the nickel strip 33 is attached to the communication surface between the first cavity 41 and the second cavity 42. Among them, the plastic pressing piece 4 is also provided with a third cavity 43, and the fixed end of the AC folding pin 2 is arranged in the third cavity 43. And there is a communication groove between the third cavity 43 and the second cavity 42, and the fixed end of the AC folding pin 2 is connected with the second conductive part 32 through the communication groove.

[0100] As shown in the figure, Figure 4 The power adapter also includes a housing 5. The circuit board 1, the conductive assembly 3 and the AC folding pin 2 are all arranged in the containing space in the housing 5; the area opposite to the AC folding pin 2 of the housing 5 is provided with a through port 51, so that the AC folding pin 2 can be extended or retracted relative to the housing 5. Specifically, the plastic pressing piece 4 is arranged in the containing space in the housing 5, wherein the plastic pressing piece 4 divides the containing space into two spaces, and the circuit board 1 is arranged in the space not communicated with the cavity of the plastic pressing piece 4.

[0101] The following is a specific structure of the first conductive part 31, the second conductive part 32 and the circuit board 1.

[0102] As shown in the figure, Figure 5 The first conductive part 31 includes a flat part 311, and the opposite ends of the flat part 311 are respectively bent in opposite directions along the same side to form two inverted U-shaped structure elastic arm parts 312, and one end of the flat part 311 is connected with the nickel strip 33. Specifically, the two inverted U-shaped structure elastic arm parts 312 combine to form an m-shaped clamping structure.

[0103] As shown in the figure, Figure 6As shown, the conductive end of the circuit board 1 is inserted between the two elastic arm portions 312, so that the conductive end of the circuit board 1 abuts against the two elastic arm portions 312. Further, as shown Figure 7 As shown, the plastic pressing piece 4 is provided with a window 44 at a region opposite to the elastic arm portions 312, so that the conductive end of the circuit board 1 is inserted between the two elastic arm portions 312 through the window 44.

[0104] As shown Figure 8 As shown, the plastic pressing piece 4 is provided with a recess 45 communicating with the first cavity 41, and the planar portion 311 is provided with a protrusion 313 at a side opposite to the recess 45, and the recess 45 and the protrusion 313 are clamped.

[0105] As shown Figure 9 As shown, the second conductive member 32 comprises a connecting portion 321, and the first end of the connecting portion 321 is provided with two first elastic pieces 322 parallel to each other along a first direction. One of the first elastic pieces 322 is connected to the fixed end of the AC folding pin 2, and the nickel strip 33 is connected to an end of the connecting portion 321 away from the first elastic pieces 322. The second end of the connecting portion 321 opposite to the first end is provided with two second elastic pieces 323 parallel to each other along a second direction. The first direction is collinear and opposite to the second direction. One of the second elastic pieces 323 is connected to the nickel strip 33.

[0106] In an alternative embodiment, as shown Figure 9 As shown, the first elastic piece 322 is provided with a through hole, and the fixed end of the AC folding pin 2 is inserted into the through hole, so that the AC folding pin 2 is connected to the second conductive member 32. In addition, the end of the first elastic piece 322 for connecting the AC folding pin 2 is provided with an inwardly bent extension 324, which provides an outward deformation force for the two first elastic pieces 322 when the second conductive member 32 is arranged in the second cavity 42 of the plastic pressing piece 4, so that the two first elastic pieces 322 can be attached to the second cavity 42, and the second conductive member 32 is prevented from being easily detached from the plastic pressing piece 4 by the friction force between the first elastic piece 322 and the cavity wall.

[0107] As shown Figure 10As shown, the circuit board 1 includes a first PCB board 11, a second PCB board 12, a third PCB board 13 and a fourth PCB board 14. The first PCB board 11 is detachably connected with the second PCB board 12 and the third PCB board 13 respectively on the opposite first side and second side. The fourth PCB board 14 is detachably connected with the second PCB board 12 and the third PCB board 13 respectively on the opposite third side and fourth side. The first end of the first conductive part 31 is connected with the conductive end of the fourth PCB board 14. The first PCB board 11 abuts against the second PCB board 12, so that the first PCB board 11, the second PCB board 12, the third PCB board 13 and the fourth PCB board 14 form a cuboid structure. Among them, the first PCB board 11, the second PCB board 12, the third PCB board 13 and the fourth PCB board 14 surround a space for arranging electronic components on the PCB, improve the space utilization, thereby reducing the overall volume of the power adapter.

[0108] In an alternative embodiment, as shown in Figure 11 The first PCB board 11 is respectively provided with a first tenon 111 on the opposite first side and second side, and the second PCB board 12 and the third PCB board 13 are both provided with a first through hole 121, and the first tenon 111 is clamped with the first through hole 121. The fourth PCB board 14 is respectively provided with a second tenon 141 on the opposite third side and fourth side, and the second PCB board 12 and the third PCB board 13 are both provided with a second through hole 122, and the second tenon 141 is clamped with the second through hole 122.

[0109] In summary, the power adapter provided by the utility model realizes the conductive connection between the AC folding plug and the circuit board through the first conductive part and the second conductive part connecting the circuit board and the AC folding plug respectively, and the nickel strip and the conductive part, compared with the traditional wire tin soldering or fixed spring piece mode, do not need to be tin soldered, effectively avoiding the problem of poor conductivity caused by unstable tin soldering quality, and the length of the nickel strip can be adjusted according to the volume of the product. At the same time, the first conductive part and the second conductive part are assembled to the plastic pressing piece for fixation, which enhances the overall structural stability of the power adapter. For products of different volumes, only the plastic pressing piece needs to be replaced, so that the relative position of the first conductive part and the second conductive part can be adjusted without the need to redevelop the mold, effectively reducing the production cost. In addition, the four separate PCB boards are spliced and combined through the mortise and tenon joint, effectively reducing the equipment assembly difficulty, and when the PCB board is repaired or replaced, it is more convenient and fast, without the need to disassemble the entire circuit board, reducing the maintenance cost and difficulty. In this way, the production difficulty of the product is effectively reduced, and the production efficiency of the product is improved.

[0110] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent transformation or direct or indirect application in the related technical field based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A power adapter, characterized by, The circuit board, the AC folding pin and the conductive assembly are included. The conductive assembly includes a first conductive piece, a second conductive piece and a nickel strip. The first end of the first conductive piece is connected with the conductive end of the circuit board. The first end of the second conductive piece is connected with the fixed end of the AC folding pin. One end of the nickel strip is connected with the second end of the first conductive piece, and the other end of the nickel strip is connected with the second end of the second conductive piece.

2. A power adapter according to claim 1, characterized in that The plastic pressing piece is also included. The plastic pressing piece is provided with a first cavity and a second cavity. The first conductive piece is arranged in the first cavity. The second conductive piece is arranged in the second cavity. The nickel strip is attached to the connecting surface between the first cavity and the second cavity.

3. A power adapter according to claim 2, wherein, The first conductive piece includes a flat part. The flat part is bent to form two inverted U-shaped structure elastic arm parts at opposite ends thereof along opposite directions of the same side, and one end of the nickel strip is connected with the flat part. The conductive end of the circuit board is inserted between the two elastic arm parts, so that the conductive end of the circuit board abuts against the two elastic arm parts.

4. A power adapter according to claim 3, wherein, The plastic pressing piece is provided with a window at a region opposite to the elastic arm parts, so that the conductive end of the circuit board is inserted between the two elastic arm parts through the window.

5. The power adapter of claim 3, wherein, The plastic pressing piece is provided with a groove in communication with the first cavity, and a protrusion is arranged at a side of the flat part opposite to the groove, and the groove and the protrusion are clamped.

6. The power adapter of claim 1, wherein, The second conductive piece includes a connecting part. The connecting part is provided with two first elastic sheets parallel to each other at a first end thereof along a first direction. One of the first elastic sheets is connected with the fixed end of the AC folding pin, and the nickel strip is connected to an end of the connecting part away from the first elastic sheet.

7. A power adapter according to claim 6, wherein, The connecting part is provided with two second elastic sheets parallel to each other at a second end thereof opposite to the first end along a second direction. The first direction is collinear with and opposite to the second direction. One of the second elastic sheets is connected with the nickel strip.

8. The power adapter of claim 1, wherein, The circuit board includes a first PCB board, a second PCB board, a third PCB board and a fourth PCB board. The first side and the second side of the first PCB board are respectively detachably connected with the second PCB board and the third PCB board. The third side and the fourth side of the fourth PCB board are respectively detachably connected with the second PCB board and the third PCB board. The first end of the first conductive piece is connected with the conductive end of the fourth PCB board. The first PCB board abuts against the second PCB board, so that the first PCB board, the second PCB board, the third PCB board and the fourth PCB board form a cuboid structure.

9. A power adapter according to claim 8, wherein, The first side and the second side of the first PCB board are respectively provided with first tenons, the second PCB board and the third PCB board are respectively provided with first through holes, and the first tenons are clamped with the first through holes. The third side and the fourth side of the fourth PCB board are respectively provided with second tenons, the second PCB board and the third PCB board are respectively provided with second through holes, and the second tenons are clamped with the second through holes.

10. The power adapter of claim 1, wherein, The outer shell is also included. The circuit board, the conductive assembly, and the AC folding pin are disposed in a receiving space in the housing. An opening is provided in a region of the housing opposite the AC folding pin, such that the AC folding pin can be extended or retracted relative to the housing.

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