Power adapter

Abstract

A power adapter includes a body and a plug. The body includes a top plate, a first sidewall, a second sidewall, a stopper and a snap. The first and second sidewalls are located at two opposite sides of the top plate and form a receiving slot with the top plate and the stopper. The snap is a notch between the first sidewall and the stopper or a through hole on the first sidewall. The plug is disposed in the receiving slot and includes first and second side plates disposed oppositely. The first side plate is provided with a slit which divides the first side plate into a fixed part and a movable part. The movable part is provided with a protrusion which is engaged with the snap. Inner surfaces of the first and second sidewalls are spaced apart by a first distance. Outer surfaces of the first and second side plates are spaced apart by a second distance. An outer edge of the protrusion and the outer surface of the second side plate are spaced apart by a third distance. The first distance is greater than or equal to the second distance and less than the third distance. The above configuration makes the power adapter of the present disclosure have high structural reliability, and the installation and removal of the replaceable plug are more intuitive and convenient.

Description

Technical Field

[0001] This disclosure relates to a power adapter. Background Technology

[0002] Some existing power adapters feature interchangeable plugs, allowing users to switch between different plug sizes, which is very convenient for users who frequently travel to different regions. However, existing power adapters still need improvement in terms of the ease of installation and removal of interchangeable plugs and structural reliability. Summary of the Invention

[0003] To address the aforementioned technical problems, this disclosure provides a power adapter with a replaceable plug, which has high structural reliability and makes the installation and removal of the replaceable plug more intuitive and convenient.

[0004] This disclosure provides a power adapter comprising a body and a plug. The body includes a top plate, a first side wall, a second side wall, a stop portion, and a engaging portion. The first and second side walls are located on opposite sides of the top plate and form a receiving groove with the top plate and the stop portion. The engaging portion is a recess between the first side wall and the stop portion, or a through hole on the first side wall. The plug is disposed in the receiving groove and includes the first and second side plates disposed opposite each other. The first side plate has a slot that divides the first side plate into a fixed portion and a movable portion. The movable portion has a protrusion for engaging with the engaging portion. The inner surface of the first side wall is spaced apart from the inner surface of the second side wall by a first distance, the outer surface of the first side plate is spaced apart from the outer surface of the second side plate by a second distance, and the outer edge of the protrusion is spaced apart from the outer surface of the second side plate by a third distance. The first distance is greater than or equal to the second distance and less than the third distance.

[0005] In one or more embodiments, a limiting member is provided on the first sidewall, the limiting member being located on the inner surface of the first sidewall and protruding toward the second sidewall. The protrusion is provided with a groove, the groove and a portion of the gap forming a sliding groove structure, and the limiting member slidingly engaging with the sliding groove structure.

[0006] In one or more embodiments, a limiting member is provided on the first sidewall, the limiting member is located on the upper surface of the first sidewall and protrudes toward the second sidewall, and the first side plate is slidably disposed between the limiting member and the top plate.

[0007] In one or more embodiments, the plug is provided with a baffle close to the inner surface of the movable part, and the distance between the outer surface of the baffle and the inner surface of the movable part is greater than or equal to the width of the protrusion.

[0008] In one or more embodiments, the plug is further provided with a support member that connects the first side plate and the baffle.

[0009] In one or more embodiments, the support is located at one-half to one-third of the length of the first side plate, measured from the leading edge of the first side plate.

[0010] In one or more embodiments, the width of the bump is greater than the width of the movable part, or the length of the movable part is greater than the length of the bump.

[0011] In one or more embodiments, the front end of the bump has a curved surface.

[0012] In one or more embodiments, the top plate is provided with a limiting member comprising a vertical portion substantially perpendicular to the top plate and a horizontal portion substantially parallel to the top plate, the horizontal portion being connected to the vertical portion and spaced from the top plate by part or all of the vertical portion. The plug is provided with a limiting groove corresponding to the limiting member.

[0013] In one or more embodiments, the limiting member is connected to the surface of the stop portion facing the receiving groove. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a power adapter according to one embodiment of the present disclosure;

[0015] Figure 2 yes Figure 1 An exploded view of the power adapter shown.

[0016] Figure 3 yes Figure 1 The diagram shows a cross-sectional view of the power adapter at line segment 3-3'.

[0017] Figure 4 yes Figure 1 The diagram shows a cross-sectional view of the power adapter at line segment 4-4'.

[0018] Figure 5 yes Figure 1 A schematic diagram of the power adapter plug is shown;

[0019] Figure 6 This is a cross-sectional view of a power adapter according to another embodiment of this disclosure;

[0020] Figure 7 This is a cross-sectional view of a power adapter according to another embodiment of this disclosure;

[0021] Figure 8 This is a side view of a plug according to another embodiment of this disclosure;

[0022] Figure 9 This is a top view of a power adapter according to another embodiment of this disclosure;

[0023] Figure 10 This is a top view of a power adapter according to another embodiment of this disclosure;

[0024] Figure 11This is a top view of a power adapter according to another embodiment of this disclosure.

[0025] [Symbol Explanation]

[0026] 19: Power adapter

[0027] 20:Ontology

[0028] 22: Conductive spring

[0029] 24: Stopping part

[0030] 240: Surface

[0031] 241: Stop

[0032] 25: Receptacle

[0033] 26: Card-connecting section

[0034] 29: Top Slab

[0035] 291: First side

[0036] 292: Second side

[0037] 293: Third side

[0038] 31: First sidewall

[0039] 32: Second sidewall

[0040] 41, 41B: First limiting component

[0041] 42, 42B: Second limiting component

[0042] 43: Third limiting component

[0043] 44: Vertical section

[0044] 45: Horizontal section

[0045] 50: Plug

[0046] 51: Inserting a foot

[0047] 53: Gap

[0048] 54: Curved surface

[0049] 55: Fixing part

[0050] 56: Movable parts

[0051] 57: Bump

[0052] 58: Top Wall

[0053] 61: First side plate

[0054] 610, 620: Front edge

[0055] 62: Second side panel

[0056] 63: Groove

[0057] 64: Slide structure

[0058] 65: Limiting groove

[0059] 671: First baffle

[0060] 672: Second baffle

[0061] 681: First Support Component

[0062] 682: Second support component

[0063] 691: First partition

[0064] 692: Second partition

[0065] K1: First direction

[0066] K2: Second direction

[0067] K3: Third-party

[0068] T1: First distance

[0069] T2: Second distance

[0070] T3: Third Distance

[0071] T4: Fourth Distance

[0072] T5: Fifth Distance

[0073] W: Width Detailed Implementation

[0074] To make the description of this disclosure more detailed and complete, reference may be made to the accompanying drawings and the various embodiments described below. The elements in the drawings are not drawn to scale and are provided for illustrative purposes only. Many practical details are described below to provide a comprehensive understanding of this disclosure; however, those skilled in the art will understand that this disclosure can be practiced without one or more of these practical details, and therefore, these details should not be used to limit this disclosure.

[0075] Referring to Figures 1 and 2, this disclosure provides a power adapter 19, which includes a body 20 and a plug 50 detachably assembled to the body 20. Referring to Figure 2, the body 20 includes a top plate 29, a first side wall 31, a second side wall 32, a stop portion 24, and a locking portion 26. The first side wall 31 and the second side wall 32 are located on opposite sides of the top plate 29, forming receiving grooves 25 with the top plate 29 and the stop portion 24. Specifically, the first side wall 31 is located on a first side 291 of the top plate 29. The second side wall 32 is located on a second side 292 of the top plate 29. The stop portion 24 is located on a third side 293 of the top plate 29. The first side 291 and the second side 292 are opposite sides of the top plate 29, and both are connected to the third side 293. The locking portion 26 is a notch between the first side wall 31 and the stop portion 24.

[0076] Referring to Figures 1 and 2, the plug 50 is detachably disposed in the receiving groove 25 of the body 20. The first sidewall 31 and the second sidewall 32 guide the plug 50 into or out of the receiving groove 25 along the first direction K1 or its opposite direction, and prevent the assembled plug 50 from moving along the second direction K2 or its opposite direction. During assembly, the stop 24 assists the plug 50 in stopping at the desired position. The first direction K1 is substantially parallel to the first side 291 of the top plate 29. The second direction K2 is substantially parallel to the third side 293 of the top plate 29 and substantially perpendicular to the first direction K1.

[0077] Referring to Figures 1 and 2, the plug 50 includes a first side plate 61 and a second side plate 62 disposed opposite to each other. The first side plate 61 has a slot 53. The slot 53 divides the first side plate 61 into a fixed part 55 and a movable part 56. The movable part 56 has a protrusion 57 for engaging with the engaging part 26. The protrusion 57 may be disposed at the end of the movable part 56 and protrude outward from the movable part 56. Referring to Figure 2, the inner surface of the first side wall 31 and the inner surface of the second side wall 32 are separated by a first distance T1. The outer surface of the first side plate 61 and the outer surface of the second side plate 62 are separated by a second distance T2. The outer edge of the protrusion 57 of the first side plate 61 and the outer surface of the second side plate 62 are separated by a third distance T3. The first distance T1 is greater than or equal to the second distance T2 and less than the third distance T3.

[0078] With the aforementioned structural configuration, the user only needs to apply force to push the plug 50 into the receiving groove 25 along the first direction K1 to assemble the plug 50 onto the body 20. Specifically, when the user applies force to push the plug 50 into the receiving groove 25 along the first direction K1, part of the applied force acts on the first sidewall 31 through the protrusion 57, causing the first sidewall 31 to generate a reaction force on the protrusion 57. The reaction force causes the movable part 56 to bend inward and store elastic force (i.e., elastic deformation), allowing the protrusion 57 to enter the receiving groove 25 and abut against the inner surface of the first sidewall 31. Then, the protrusion 57 continues to abut against the first sidewall 31 and moves toward the stop part 24. When the protrusion 57 moves to the position of the corresponding engaging part 26, the movable part 56 returns to its original shape and releases the elastic force, causing the protrusion 57 to automatically engage in the engaging part 26, thereby completing the assembly of the plug 50 and the body 20. The protrusion 57 and the engaging portion 26 are used to prevent the assembled plug 50 from moving along the first direction K1 and its opposite direction, or even from dislodging from the receiving groove 25. When the user wants to remove the plug 50 from the body 20, the user only needs to press the protrusion 57 inward to make the protrusion 57 disengage from the engaging portion 26, and then push the plug 50 out of the receiving groove 25 along the opposite direction of the first direction K1.

[0079] Referring to Figure 1, in one embodiment, in the first direction K1, the length of the movable part 56 may be greater than the length of the protrusion 57 to increase the elasticity of the movable part 56. In one embodiment, in the third direction K3, the width of the protrusion 57 may be greater than the width of the movable part 56 to increase the stability of the protrusion 57 engaging with the engaging part 26. The third direction K3 is substantially perpendicular to the top plate 29, and substantially perpendicular to the first direction K1 and the second direction K2. In one embodiment, the front end of the protrusion 57 has an arc surface 54 to reduce the resistance when pushing the plug 50 into the receiving groove 25.

[0080] Please refer to Figure 2 and Figure 3In one embodiment, the first sidewall 31 of the body 20 is provided with a first limiting member 41. The first limiting member 41 is located on the inner surface of the first sidewall 31 and protrudes toward the second sidewall 32. The first limiting member 41 may be a slide rail extending along a first direction K1. The protrusion 57 of the first side plate 61 of the plug 50 is provided with a groove 63, which forms a groove structure 64 with a portion of the gap 53. Specifically, the groove 63 of the protrusion 57 extends along the first direction K1 and forms a groove structure 64 with a portion of the gap 53 extending along the first direction K1. That is, the groove structure 64 extends along the first direction K1. In the third direction K3, the groove 63 and the gap 53 may be aligned with each other and have the same or similar width. The first limiting member 41 slides in engagement with the groove structure 64. The first limiting member 41 and the sliding groove structure 64 are used to guide the plug 50 to slide into the receiving groove 25 along the first direction K1 during assembly and to guide the plug 50 to slide out of the receiving groove 25 along the opposite direction of the first direction K1 during disassembly. After assembly, the first limiting member 41 is located in the portion of the gap 53 extending along the first direction K1, which prevents the assembled plug 50 from moving in the third direction K3 and disengaging from the receiving groove 25.

[0081] Please refer to Figure 1 and Figure 2 In one embodiment, the second side plate 62 of the plug 50 may have the same structure as the first side plate 61, i.e., it also has the same slot 53, fixing part 55, movable part 56, and protrusion 57. The second side wall 32 of the body 20 may have another engaging part 26 between it and the stop part 24, which is a recess between the second side wall 32 and the stop part 24 for engaging with the protrusion 57 of the second side plate 62. Please refer to... Figure 1 When the second side plate 62 has a protrusion 57, the outer edge of the protrusion 57 of the second side plate 62 is spaced a fourth distance T4 from the outer surface of the first side plate 61. Please refer to... Figure 1 and Figure 2 The first distance T1 is greater than or equal to the second distance T2 and less than the fourth distance T4.

[0082] Please refer to Figure 2 and Figure 3 In one embodiment, the second sidewall 32 of the body 20 may be provided with a second limiting member 42. The second limiting member 42 is located on the inner surface of the second sidewall 32 and protrudes toward the first sidewall 31. The protrusion 57 of the second side plate 62 of the plug 50 is also provided with a groove 63, a portion of which extends along the first direction K1 with the gap 53 of the second side plate 62 to form a sliding groove structure 64. The second limiting member 42 is configured to slide into the sliding groove structure 64 to further guide the plug 50 to slide into and out of the receiving groove 25 along the first direction K1. After assembly, the second limiting member 42 is located within the portion of the gap 53 extending along the first direction K1, thus preventing the plug 50 from moving in the third direction K3 and disengaging from the receiving groove 25.

[0083] Please refer to Figure 7 This is a cross-sectional view of a power adapter according to another embodiment of the present disclosure. In this embodiment, the first sidewall 31 of the body 20 is provided with a first limiting member 41B, which is located on the upper surface of the first sidewall 31 and protrudes toward the second sidewall 32. The second sidewall 32 of the body 20 is provided with a second limiting member 42B, which is located on the upper surface of the second sidewall 32 and protrudes toward the first sidewall 31. The plug 50 is located between the second limiting member 42B and the top plate 29. The first limiting member 41B, the first sidewall 31, and the top plate 29 form a guide groove, and the second limiting member 42B, the second sidewall 32, and the top plate 29 form a guide groove. These two guide grooves are used to guide the plug 50 to slide into and out of the receiving groove 25 along the first direction K1, and to prevent the assembled plug 50 from moving in the third direction K3 and dislodging from the receiving groove 25. Specifically, the first side plate 61 of the plug 50 slides between the first limiting member 41B and the top plate 29, and the second side plate 62 of the plug 50 slides between the second limiting member 42B and the top plate 29. After assembly, the first limiting member 41B and the second limiting member 42B are located on the top wall 58 of the plug 50. In this embodiment, the protrusion 57 of the first side plate 61 and the protrusion 57 of the second side plate 62 of the plug 50 do not need to be provided with grooves.

[0084] Please refer to Figure 2 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the top plate 29 of the body 20 is further provided with at least one third limiting member 43. Each third limiting member 43 includes at least one vertical portion 44 substantially perpendicular to the top plate 29 and at least one horizontal portion 45 substantially parallel to the top plate 29. The at least one horizontal portion 45 is connected to a vertical portion 44 and is spaced apart from the top plate 29 by at least a portion of the vertical portion 44. The plug 50 is provided with a limiting groove 65 corresponding to the at least one third limiting member 43. The shape of the limiting groove 65 matches the shape of the third limiting member 43 so that the third limiting member 43 can be inserted into and disengaged from the limiting groove 65 along a first direction K1, the horizontal portion 45 can prevent the assembled plug 50 from moving in a third direction K3, and the vertical portion 44 can prevent the assembled plug 50 from moving in a second direction K2 and its opposite direction.

[0085] Please refer to Figure 2 , Figure 4 and Figure 5 In one embodiment, the top plate 29 is provided with a third limiting member 43, which includes a vertical portion 44 and a horizontal portion 45. The horizontal portion 45 is separated from the top plate 29 by the entire vertical portion 44, and the horizontal portion 45 and the vertical portion 44 form a T-shaped structure. That is, the third limiting member 43 is a T-shaped structure.

[0086] Please refer to Figure 6 In another embodiment, the top plate 29 is provided with two third limiting members 43, each third limiting member 43 comprising a vertical portion 44 and a horizontal portion 45. The horizontal portion 45 is separated from the top plate 29 by the entire vertical portion 44, and the horizontal portion 45 and the vertical portion 44 form an L-shaped structure. That is, the third limiting members 43 are two L-shaped structures. In other embodiments, the third limiting members 43 may also be one or more structures of E-shape, F-shape, H-shape, or other suitable geometric shapes. Furthermore, the top plate 29 may also be provided with multiple third limiting members of different geometric shapes or sizes.

[0087] Please refer to Figure 2 In one embodiment, the third limiting member 43 is connected to the surface 240 of the stop portion 24 facing the receiving groove 25. In other embodiments, the third limiting member 43 may also be separately provided from the stop portion 24.

[0088] Please refer to Figure 5 In one embodiment, the plug 50 is provided with a first baffle 671, which is located near the inner surface of the movable portion 56 of the first side plate 61. The first baffle 671 is substantially parallel to the first side plate 61. In the second direction K2, a fifth distance T5 between the outer surface of the first baffle 671 and the inner surface of the movable portion 56 of the first side plate 61 is greater than or equal to the width W of the protrusion 57. The outer surface of the first baffle 671 is the surface of the first baffle 671 away from the center of the plug 50. The inner surface of the movable portion 56 of the first side plate 61 is the surface of the movable portion 56 of the first side plate 61 near the center of the plug 50. The first baffle 671 is configured to prevent the movable portion 56 of the first side plate 61 from bending excessively inward and breaking. In another embodiment, when the second side plate 62 is provided with a movable part 56 and a protrusion 57, the plug 50 may be provided with a second baffle 672. The second baffle 672 is close to the inner surface of the movable part 56 of the second side plate 62 to prevent the movable part 56 of the second side plate 62 from bending inward excessively and breaking.

[0089] Please refer to Figure 5 In one embodiment, the plug 50 further includes a first support member 681, which connects the first side plate 61 and the first baffle 671 to support the first side plate 61 and the first baffle 671, thereby increasing the structural stability of the plug 50 and reducing the risk of breakage of the movable portion 56 of the first side plate 61 due to inward bending. The first support member 681 may be located at one-half to one-third of the length of the first side plate 61, measured from the leading edge 610. In one embodiment, the first support member 681 may be located near one end of the gap 53 in the first side plate 61.

[0090] Please refer to Figure 5In another embodiment, the plug 50 may be provided with a second support member 682, which connects the second side plate 62 and the second baffle 672 to support the second side plate 62 and the second baffle 672, thereby increasing the structural stability of the plug 50 and reducing the risk of breakage of the movable part 56 of the second side plate 62 due to inward bending. The second support member 682 may be located at one-half to one-third of the length of the second side plate 62, measured from the leading edge 620. The second support member 682 may be located near one end of the gap 53 in the second side plate 62. In this embodiment, the second support member 682 is positioned corresponding to the first support member 681, but is not limited thereto.

[0091] Please refer to Figure 2 and Figure 5 In one embodiment, the protrusion 57 of the plug 50 is located below the top wall 58, and the top wall 58 covers a portion of the protrusion 57. Please refer to... Figure 8 In another embodiment, the upper surface of the protrusion 57 is substantially flush with the upper surface of the top wall 58, and the protrusion 57 is spaced apart from the top wall 58 by a distance.

[0092] Please refer to Figure 2 In one embodiment, a stop 24 is provided on a third side 293 of the top plate 29 and extends from a first side 291 of the top plate 29 to a second side 292. See also... Figure 9 In another embodiment, the stop 24 may occupy only a portion of the third side 293 of the top plate 29. In this embodiment, the stop 24 is located in the middle of the third side 293 of the top plate 29, but is not limited thereto. The stop 24 may also be close to or adjacent to the first side 291 or the second side 292 of the top plate 29. Please refer to... Figure 10 and Figure 11 In other embodiments, the stop portion 24 may include two or more stops 241. For example... Figure 10 As shown, the stop portion 24 includes two stops 241, which are respectively adjacent to the first side 291 and the second side 292 of the top plate 29. Figure 11 As shown, the stop portion 24 includes three spaced-apart blocks 241, located at both ends and the middle of the third side 293 of the top plate 29, respectively. The shape, size, and / or height of the aforementioned stop portion 24 or blocks 241 can be adjusted according to actual needs, as long as the stop portion 24 or blocks 241 can stop the auxiliary plug 50 in the required position during assembly.

[0093] Please refer to Figure 2 In the aforementioned embodiment, the engaging portion 26 is a recess between the first sidewall 31 and the stop portion 24, or a recess between the second sidewall 32 and the stop portion 24. Please refer to... Figure 9In another embodiment, the engaging portion 26 may be a through hole on the first sidewall 31 or a through hole on the second sidewall 32. The engaging portion 26 may divide the first sidewall 31 or the second sidewall 32 into two sections.

[0094] When the main body 20 has two engaging portions 26, the following embodiments are available. Please refer to... Figure 2 In one embodiment, the two engaging portions 26 are recesses between the first sidewall 31 and the stop portion 24, and a recess between the second sidewall 32 and the stop portion 24. Please refer to... Figure 9 and Figure 10 In some embodiments, the two engaging portions 26 are respectively through holes on the first sidewall 31 and through holes on the second sidewall 32. Please refer to... Figure 9 The two engaging parts 26 can be aligned in the first direction K1. Please refer to... Figure 10 The two engaging parts 26 may not be aligned in the first direction K1. The positions of the two engaging parts 26 in the first direction K1 can be adjusted as needed. Please refer to... Figure 11 In one embodiment, the two engaging portions 26 are respectively a through hole on the first sidewall 31 and a recess between the second sidewall 32 and the stop portion 24. Conversely, the two engaging portions 26 may also be respectively a recess between the first sidewall 31 and the stop portion 24 and a through hole in the second sidewall 32.

[0095] The above lists various embodiments of the stop part 24 and various embodiments of the engaging part 26. Figure 2 and Figures 9 to 11 Four combinations of the stop portion 24 and the engaging portion 26 are illustrated, but the present invention is not limited thereto. Different combinations can be made according to actual needs.

[0096] Please refer to Figure 2 In one embodiment, the body 20 further includes two conductive spring contacts 22 passing through the top plate 29, and the plug 50 further includes two pins 51 passing through the top wall 58. When the plug 50 is assembled to the body 20, the conductive spring contacts 22 contact the pins 51. Referring to the preceding text, the first side wall 31, the second side wall 32, the stop portion 24, the engaging portion 26, the protrusion 57, the first limiting member 41 or 41B, the second limiting member 42 or 42B, the gap 53, the third limiting member 43 and / or the limiting groove 65 can restrict the movement of the assembled plug 50 in the first direction K1, the second direction K2 and / or the third direction K3, which improves the bonding stability between the plug 50 and the body 20, thereby enabling the pins 51 to stably contact the conductive spring contacts 22.

[0097] Please refer to Figure 5In some embodiments, the plug 50 further includes a first partition 691 and a second partition 692 located on opposite sides of the limiting groove 65. A portion of one pin 51 of the plug 50 is located between the first partition 691 and the first baffle 671, and a portion of the other pin 51 is located between the second partition 692 and the second baffle 672. When the plug 50 is combined with the body 20, a conductive spring 22 of the body 20 is located between the first partition 691 and the first baffle 671 and contacts the corresponding pin 51, and another conductive spring 22 is located between the second partition 692 and the second baffle 672 and contacts the corresponding pin 51. In one embodiment, a first support member 681 may extend and connect to the first partition 691 to support the first partition 691. A second support member 682 may extend and connect to the second partition 692 to support the second partition 692.

[0098] The plug 50 can be a Chinese standard, American standard, European standard, British standard, Australian standard, Korean standard, Indian standard or other standard plugs. According to the specifications of the plug 50, the pins 51 have corresponding numbers, shapes, positions and angles, and other components such as the first partition 691 and the second partition 692 can also be designed accordingly.

[0099] Although this disclosure has been presented above with reference to embodiments, it is not intended to limit this disclosure. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure shall be determined by the claims.

Claims

1. A power adapter, characterized by, Include: A body comprising a top plate, a first side wall, a second side wall, a stop portion, and a locking portion. The first side wall and the second side wall are located on opposite sides of the top plate and form a receiving groove with the top plate and the stop portion. The locking portion is either a notch between the first side wall and the stop portion or a through hole in the first side wall. A plug is disposed in the receiving groove and includes a first side plate and a second side plate disposed opposite each other. The first side plate has a gap that divides the first side plate into a fixed part and a movable part. The movable part has a protrusion for engaging with the engaging part. Wherein, the inner surface of the first sidewall is spaced apart from the inner surface of the second sidewall by a first distance, the outer surface of the first sideplate is spaced apart from the outer surface of the second sideplate by a second distance, and the outer edge of the protrusion is spaced apart from the outer surface of the second sideplate by a third distance, wherein the first distance is greater than or equal to the second distance and less than the third distance.

2. The power adapter of claim 1, wherein, The first sidewall is provided with a limiting member, which is located on the inner surface of the first sidewall and protrudes toward the second sidewall. The protrusion is provided with a groove, which forms a sliding groove structure with a part of the gap. The limiting member slides in cooperation with the sliding groove structure.

3. The power adapter of claim 1, wherein, The first sidewall is provided with a limiting member, which is located on the upper surface of the first sidewall and protrudes toward the second sidewall. The first side plate is slidably disposed between the limiting member and the top plate.

4. The power adapter of claim 1, wherein, The plug is provided with a baffle that is close to the inner surface of the movable part, and the distance between the outer surface of the baffle and the inner surface of the movable part is greater than or equal to the width of the protrusion.

5. The power adapter of claim 4, wherein, The plug is also provided with a support member that connects the first side plate and the baffle.

6. The power adapter of claim 5, wherein, The support is located at one-half to one-third of the length of the first side plate, measured from the leading edge of the first side plate.

7. The power adapter of claim 1, wherein, The width of the protrusion is greater than the width of the movable part, or the length of the movable part is greater than the length of the protrusion.

8. The power adapter as described in claim 1, characterized in that, The front end of the bump has a curved surface.

9. The power adapter as described in claim 1, characterized in that, The top plate is provided with a limiting member, which includes a vertical portion substantially perpendicular to the top plate and a horizontal portion substantially parallel to the top plate. The horizontal portion is connected to the vertical portion and is partially or entirely separated from the top plate by the vertical portion. The plug is provided with a limiting groove corresponding to the limiting member.

10. The power adapter as described in claim 9, characterized in that, The limiting member is connected to a surface of the stop portion facing the receiving groove.

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