A conversion adapter

Abstract

This application provides a conversion adapter, including a plug assembly, a main body, a rotating part, electrodes, a circuit board, and a drive mechanism. The drive mechanism is connected to both the rotating part and the plug assembly, and is used to switch the plug assembly between a retracted position and a pluggable position when the rotating part rotates. In the pluggable position, the prongs extend relative to the main body and can be electrically connected to an external power source; in the retracted position, the prongs retract relative to the main body. By setting up the rotating part and the drive mechanism, the rotational motion of the rotating part is precisely converted into the linear motion of the plug assembly. The user only needs to drive the rotating part to rotate to extend and retract the prongs of the plug assembly, improving the convenience of user operation. At the same time, the design of the rotating part also makes the entire conversion adapter more concise and aesthetically pleasing.

Description

Technical Field

[0001] This application relates to the field of power adapters, and more particularly to a conversion adapter. Background Technology

[0002] In order to adapt to the socket standards of different countries, it is usually necessary to carry a socket adapter when traveling internationally.

[0003] In existing technologies, such adapters mostly use a linear toggle mechanism to extend and retract the plug, requiring long grooves and protruding knobs on the adapter's casing. Firstly, this design is aesthetically unappealing, and dust easily accumulates in the grooves, affecting its lifespan. Secondly, the toggle operation, due to its long travel or uneven resistance, makes smooth one-handed operation difficult, and the user experience needs improvement. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a conversion adapter, comprising: a plug assembly including pins; a body for accommodating the plug assembly, the body having sockets corresponding to the pins of the plug assembly; a rotating part rotatably disposed within the body; electrodes housed within the body; a circuit board electrically connected to the electrodes; and a driving mechanism housed within the body, the driving mechanism being connected to both the rotating part and the plug assembly, for switching the plug assembly between a retracted position and a pluggable position when the rotating part rotates; wherein, in the pluggable position, the pins extend relative to the body and are electrically connected to the electrodes and can be electrically connected to an external power source, and in the retracted position, the pins retract relative to the body.

[0005] In some embodiments, the drive mechanism includes: a rack structure circumferentially disposed on the circumferential sidewall of the rotating part; a rotation drive member connected to the plug assembly; and a reversing gear set including a first drive gear connected to the rotation drive member. When the rotating part rotates in different directions, the rack structure can mesh with the first drive gear to switch the rotation direction of the rotation drive member, so that the prongs of the plug assembly extend or retract relative to the body.

[0006] In some embodiments, there are multiple plug assemblies, and the drive mechanism includes multiple rotary drive members and multiple reversing gear sets. The reversing gear sets also include a second drive gear that is drivenly connected to the first drive gear. Each plug assembly corresponds to a rotary drive member and a reversing gear set. When the rotating part rotates, the rack structure can mesh with the first drive gear or the second drive gear respectively to switch the rotation direction of the rotary drive member, so that the pins of the corresponding plug assembly extend or retract relative to the body.

[0007] In some embodiments, the rotation drive includes a rotating rod and a threaded transmission portion disposed on the outer peripheral surface of the rotating rod; the reversing gear set further includes a lever gear, which is coaxially disposed on the rotating rod body; wherein the first drive gear and the second drive gear are both connected to the lever gear for transmission, or the lever gear is configured as either the first drive gear or the second drive gear.

[0008] In some embodiments, both the first drive gear and the second drive gear are connected to the lever gear transmission; the rack structure includes an arc-shaped first rack; the first drive gear and the second drive gear are respectively disposed on both sides of the lever gear.

[0009] In some embodiments, the reversing gear set further includes a driven gear, which is driven between the lever gear and the first driving gear, or the driven gear is driven between the lever gear and the second driving gear; or, the reversing gear set includes a plurality of driven gears, which are driven between the lever gear and the first driving gear, and between the lever gear and the second driving gear, respectively.

[0010] In some embodiments, at least one of the first driving gear, the second driving gear, and the driven gear is a compound gear, referred to as the first compound gear. The first compound gear has a first lower tooth portion and a first upper tooth portion that are offset along the axial direction of the first compound gear. The first compound gear is connected to the lever gear for transmission. The number of teeth in the first lower tooth portion is the same as the number of teeth in the first upper tooth portion. Alternatively, the number of teeth in the first upper tooth portion is greater than the number of teeth in the first lower tooth portion.

[0011] In some embodiments, both the first drive gear and the second drive gear are connected to the gear transmission; the rack structure includes a first rack and a second rack, both of which are arc-shaped; wherein the first rack and the second rack are spaced apart along the circumferential direction of the rotating part; in the axial direction of the rotating part, the position of the first rack is adapted to the position of the first drive gear, and the position of the second rack is adapted to the position of the second drive gear.

[0012] In some embodiments, the first drive gear and the second drive gear are disposed on the same side of the lever gear along the circumferential direction of the rotating portion.

[0013] In some embodiments, the second drive gear is a compound gear, and the second drive gear includes a second lower tooth portion and a second upper tooth portion offset from each other in its axial direction; wherein, the first drive gear has a first meshing section and a second meshing section in the axial direction, and the second lower tooth portion has a third meshing section and a fourth meshing section in the axial direction; the third meshing section of the second lower tooth portion is meshed with the second meshing section, and the second upper tooth portion is meshed with the lever gear; when the rotating part rotates, the first rack can directly mesh with the first meshing section of the first drive gear, and the second rack can directly mesh with the fourth meshing section of the second drive gear.

[0014] In some embodiments, the ratio of the number of teeth in the second upper tooth portion to the number of teeth in the second lower tooth portion is greater than or equal to 1.

[0015] In some embodiments, the lever gear is configured as a first drive gear or a second drive gear; the rack structure includes a first rack and a second rack, both of which are arc-shaped; wherein the first rack and the second rack are spaced apart along the circumferential direction of the rotating part and are offset along the axial direction of the rotating part; the first drive gear and the second drive gear are offset in the axial direction and partially meshed; in the axial direction of the rotating part, the position of the first rack is adapted to the position of the first drive gear, and the position of the second rack is adapted to the position of the second drive gear.

[0016] In some embodiments, the number of meshings between the first rack and the gear is the first meshing number, the number of meshings between the second rack and the gear is the second meshing number, and the absolute value of the difference between the first meshing number and the second meshing number is an odd number.

[0017] In some embodiments, the first rack and the second rack have the same number of teeth.

[0018] In some embodiments, the adapter further includes a guide mechanism, which includes a plurality of guide posts corresponding one-to-one with each plug assembly; the plug assembly further includes a base connected to the pins, the base having a threaded through hole and a guide through hole; wherein the threaded through hole is adapted to the threaded transmission part, and the rotation drive member passes through the threaded through hole; the guide posts slide through the guide through hole.

[0019] In some embodiments, the adapter further includes a positioning mechanism, which includes a positioning member and a plurality of positioning grooves; wherein one of the positioning member and the plurality of positioning grooves is disposed on the main body, and the other is disposed at intervals along the circumference of the rotating part at the bottom of the rotating part; the positioning mechanism is configured such that when any plug assembly is in the pluggable position and when the plurality of plug assemblies are in the retracted position, the positioning member engages with the corresponding positioning groove.

[0020] In some embodiments, the adapter further includes a retractable cable module, including a retractable charging cable for plugging into an external electronic device; wherein the retractable cable module is electrically connected to a circuit board.

[0021] The beneficial effects of this application are as follows: This application provides a conversion adapter, including: a plug assembly, the plug assembly including pins; a body for accommodating the plug assembly, the body having sockets corresponding to the pins of the plug assembly; a rotating part rotatably disposed in the body; an electrode element housed within the body; a circuit board electrically connected to the electrode element; and a drive mechanism housed within the body, the drive mechanism being connected to the rotating part and the plug assembly respectively, for switching the plug assembly between a retracted position and a pluggable position when the rotating part rotates; wherein, in the pluggable position, the pins extend relative to the body and are electrically connected to the electrode element and can be electrically connected to an external power source, and in the retracted position, the pins retract relative to the body.

[0022] By setting up a rotating part and a drive mechanism, the rotational motion of the rotating part is precisely converted into the linear motion of the plug assembly. Users only need to drive the rotating part to extend and retract the plug pins, which improves the convenience of user operation. At the same time, the design of the rotating part also makes the entire adapter more concise and aesthetically pleasing in appearance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1A This is a schematic diagram of one embodiment of the adapter storage location in this application; Figure 1B This is a schematic diagram of an embodiment of the adapter of this application in which the first pin is in a pluggable position; Figure 1C This is a schematic diagram of an embodiment of the adapter of this application in which the second pin is in a pluggable position; Figure 1D This is a schematic diagram of an embodiment of the adapter with the third pin in a pluggable position according to this application; Figure 1E This is a schematic diagram of another embodiment of the adapter with the second pin in a pluggable position according to this application; Figure 1F This is a schematic diagram of an embodiment of the main body when the adapter storage position is changed according to this application; Figure 1G This is a schematic diagram of an embodiment of the adapter housing of this application; Figure 1H This is an exploded view of an embodiment of the converter adapter of this application; Figure 2A This is a schematic diagram of an embodiment of the working module of this application; Figure 2BThis is a schematic diagram of an embodiment of the first plug assembly of the adapter of this application; Figure 2C This is a schematic diagram of an embodiment of the second plug assembly of the adapter of this application; Figure 2D This is a schematic diagram of an embodiment of the third plug assembly of the adapter of this application; Figure 2E This is a schematic diagram of another embodiment of the second plug assembly of the adapter in this application; Figure 2F This is a top view schematic diagram of an embodiment of the positions of the three plug components of the adapter of this application; Figure 2G This is a schematic diagram of an embodiment of the first reversing gear set of this application; Figure 3A This is a partial schematic diagram of yet another embodiment of the working module of this application; Figure 3B This is a top view schematic diagram of yet another embodiment of the working module of this application; Figure 3C This is a schematic diagram of another embodiment of the rotating part and drive mechanism of this application; Figure 4A This is a top view schematic diagram of another embodiment of the working module of this application; Figure 4B yes Figure 4A A schematic diagram showing the concealed top cover and other components; Figure 4B yes Figure 4A A schematic diagram showing the hidden rotating part; Figure 4C yes Figure 4A A schematic diagram of the transparent rotating part from another angle; Figure 5 This is a schematic diagram of another embodiment of the first plug assembly of the adapter of this application; Figure 6 This is a schematic diagram of another embodiment of the third plug assembly of the adapter in this application.

[0024] Figure label: 11. Main body; 112. Outer shell; 1121. Receiving groove; 113. Base plate; 12. Rotating part; 121. First rack; 122. Second rack; 123. Positioning groove; 124. Knob; 131. First threaded screw; 132. Second threaded screw; 133. Third threaded screw; 141. First gear; 142. Second gear; 143. Third gear; 151. First threaded through hole; 152. Second threaded through hole; 153. Third threaded through hole; 161. First guide post; 162. Second guide post; 163. Third guide post; 171. First guide through hole; 172. Second guide through hole; 173. Third guide through hole; 18. Ring electrode; 181. Electrode sheet; 182. Electrode elastic clip; 191. First reversing gear set; 192. Second reversing gear set; 193. Third reversing gear set; 201. First gear; 2011. First meshing section; 2012. Second meshing section; 202. Second gear; 2021. Third meshing section; 2022. Fourth meshing section; 2023. Second lower tooth; 2024. Second upper tooth; 203. Third gear; 204. Fourth gear; 205. Fifth gear; 21. First plug assembly; 22. Second plug assembly; 23. Third plug assembly; 241. First pin; 2411. E pole; 2412. L pole; 2413. N pole; 242. Second pin; 243. Third pin; 244. Movement base; 245. Storage shell; 246. Main connecting rod; 247. Secondary connecting rod; 248. Storage position; 251. First base; 2511. Lever; 2512. First component; 2513. Second component; 252. Second base; 253. Third base; 26. Top cover; 261. First set of sockets; 262. Second set of sockets; 263. Third set of sockets; 264. Limiting protrusion; 27. Bottom cover; 271. Gear mounting position; 28. Charging interface; 29. ​​Circuit board; 30. Telescopic cable module; 301. Charging cable; 302. Connector; 31. Fixing cap. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other alternative implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] For the description of this application, non-limiting terms are used. Figure 1A The labels “up,” “down,” “left,” and “right” shown are used to facilitate understanding of this embodiment and are not intended to limit this application. The left-right direction indicates the horizontal direction, and the up-down direction indicates the vertical direction.

[0027] This application provides a conversion adapter, including: a plug assembly, the plug assembly including pins; a body 11 for accommodating the plug assembly, the body 11 having sockets corresponding to the pins of the plug assembly; a rotating part 12 rotatably disposed in the body 11; electrodes, accommodated in the body 11 and electrically connected to the pins; a circuit board 29 electrically connected to the electrodes; and a drive mechanism, accommodated in the body 11, the drive mechanism being connected to the rotating part 12 and the plug assembly respectively, for switching the plug assembly between a retracted position and a pluggable position when the rotating part 12 rotates; wherein, in the pluggable position, the pins extend relative to the body 11 and are electrically connected to the electrodes and can be electrically connected to an external power source, and in the retracted position, the pins retract relative to the body 11.

[0028] By incorporating the rotating part 12 and the drive mechanism, the rotational motion of the rotating part 12 is precisely converted into the linear motion of the plug assembly. Users only need to drive the rotating part 12 to extend and retract the plug pins, improving ease of operation. Simultaneously, the design of the rotating part 12 also makes the entire adapter more aesthetically pleasing and streamlined. In some embodiments, multiple plug assemblies are used; users only need to drive the rotating part 12 to extend and retract the pins of each plug assembly sequentially, facilitating operation and enhancing the user experience.

[0029] The following describes several specific embodiments of an adapter that simultaneously supports three standards: British Standard (three rectangular pins), US / Japan Standard (two flat pins), and European Standard (two round pins). These correspond to the first pin 241 (British Standard three-prong rectangular pin) of the first plug assembly 21, the second pin 242 (US / Japan Standard two flat pins) of the second plug assembly 22, and the third pin 243 (European Standard two round pins) of the third plug assembly 23. It should be noted that the pins in the plug assemblies of this application can also be designed to support pins of other national standards, such as Chinese Standard, Australian Standard, and other national standards. The adapter of this application can be designed to support pins of the aforementioned different national standards individually, or it can be designed to support various combinations of different national standards.

[0030] Specifically, in some embodiments, such as Figure 1A-1E As shown, the retracted position of the plug assembly refers to the fact that the prongs of the plug assembly are retracted inside the body 11. It is understandable that if there are errors in the manufacturing process, the plug assembly may protrude slightly from the body 11 when it is in the retracted position.

[0031] A pluggable position refers to a plug assembly where a pin extends from the body 11, making it suitable for insertion into an external power outlet. In other words, after the pin is inserted into a matching power outlet, it establishes electrical connection with an external power source. At this time, the pin maintains electrical connection with the electrodes inside the body 11, thereby introducing current into the adapter.

[0032] For example, such as Figure 1B As shown, the first pin 241 is in the pluggable position, while the second pin 242 and the third pin 243 are in the retracted position.

[0033] The various forms of adapters are described below.

[0034] For ease of explanation, such as Figure 1A As shown, the top indicates the direction in which the pins extend, the bottom indicates the direction in which the pins retract, and the left and right directions are horizontal. The direction in which the rotating part 12 rotates counterclockwise is called the first direction, and the direction in which it rotates clockwise is called the second direction.

[0035] In some embodiments, such as Figure 1A , 1F As shown in 1G and 1H, the main body 11 includes a housing 112 and a base plate 113, with the housing 112 covering the base plate 113. Specifically, the rotating part 12 also includes a knob 124 for user operation. The cross-sectional shape of the operating surface or peripheral side of the knob 124 can be circular, elliptical, rectangular or polygonal with rounded corners, and is not limited here.

[0036] In this embodiment, the rotating part 12 is cylindrical, i.e., a hollow cylinder, with both its upper and lower surfaces being circular. Its outer wall can be cam-shaped, with one part wider (corresponding to a larger diameter on the upper surface), serving as the knob 124 for user rotation, and the other part narrower (corresponding to a smaller diameter on the lower surface), serving as the rotating sub-part. When the rotating part 12 rotates, the knob 124 and the rotating sub-part rotate coaxially. The rotating sub-part is located inside the housing 112. In some embodiments, the upper surface of the housing 112 is stepped, having a mounting opening corresponding to the rotating part 12. The rotating part 12 is disposed at this mounting opening and can rotate relative to the housing 112. The upper surface of the rotating part 12 is on the same plane as the housing 112 or is lower than the plane of the housing 112. At this point, a portion of the sidewall of the knob 124 protrudes from the housing 112, allowing the user to rotate the rotating part 12 by rotating the knob 124. A portion of the sidewall of the knob 124 also rotatably engages with the housing 112; that is, the part of the knob 124 protruding from the main body 11 is not a complete cylindrical shape. This design makes the structure of the rotating part 12 more stable. When the adapter is dropped or impacted, the housing 112 can distribute the stress on the rotating part 12, reducing damage to the rotating part 12.

[0037] In some embodiments, the upper surface of the housing 112 is set to be horizontal and has a mounting opening corresponding to the rotating part 12. The knob 124 protrudes from the upper surface of the housing 112. That is, relative to the above embodiment, the entire knob 124 is exposed outside the body 11, so that the user can rotate the knob 124 at more angles, thereby driving the rotation of the rotating part 12.

[0038] In some embodiments, the main body 11 further includes an upper cover 26 and a lower cover 27, which are respectively disposed on both axial sides of the rotating part 12, and the upper cover 26 and the lower cover 27 are fixedly connected. For example, the upper cover 26 is provided with a plurality of connecting brackets, and the lower cover 27 is provided with a plurality of connecting holes. The upper cover 26 and the lower cover 27 are securely connected by inserting the connecting brackets into the corresponding connecting holes. The surface shapes of the upper cover 26 and the lower cover 27 are respectively circular and adapted to the upper and lower surfaces of the rotating part 12. Along the rotation axis of the rotating part 12, the upper cover 26 is disposed on the upper surface of the knob 124, and the lower cover 27 is disposed on the lower surface of the rotating part. When the rotating part 12 rotates, the upper cover 26 and the lower cover 27 are stationary and do not rotate with it.

[0039] In some embodiments, the rotating part 12 is cylindrical. The drive mechanism and the plug assembly are disposed within the cavity of the rotating part 12. The upper cover 26 is provided with sockets corresponding to the pins of each plug assembly, such that when the plug assembly is in the pluggable position, its pins protrude from the corresponding sockets. This arrangement improves space utilization, makes the adapter structure compact, and facilitates the miniaturization design of the adapter. At the same time, the rotating part 12 protects the plug assembly and prevents radial displacement of the plug assembly when it is inserted into an external socket under force.

[0040] It is understood that, as an alternative implementation, the rotating part 12 and the knob 124 are two independent components that can be arranged vertically, i.e., the knob 124 serves as the component that drives the rotating part 12 to rotate. The connection method between the two is not limited here. For example, as... Figure 3C As shown, the rotating part 12 can be located inside the knob 124. In this case, the drive mechanism and the plug assembly are not located in the inner cavity of the rotating part 12, but are located in the main body 11 and downstream of the rotating part 12. The rotating part 12 is linked with the drive mechanism through a rotating shaft, a transmission gear set, or a rack and pinion structure to realize the extension and retraction drive control of the plug assembly.

[0041] Additionally, in some embodiments, the protruding position of the pin and the position of the knob 124 are located on the same side of the main body 11 (e.g., Figure 2B(Above the center). This design allows users to switch between different plugs and insert the adapter into the socket from the same viewpoint and operating surface without flipping or rotating the main body 11 of the adapter, making it particularly suitable for use in confined spaces. Furthermore, this design improves space utilization and contributes to the miniaturization of the device.

[0042] In other embodiments, the rotating part 12 may also be a solid cylinder, with the drive mechanism and plug assembly arranged circumferentially along the outer side wall of the rotating part 12. This structure is more convenient to manufacture and can reduce production costs.

[0043] In some embodiments, the plug assembly may be one or more, and the rotating part 12 has a circumferential wall.

[0044] The drive mechanism includes: a rack structure circumferentially disposed on the circumferential sidewall of the rotating part 12 and extending circumferentially along the circumferential sidewall; a rotation drive member connected to the plug assembly; and a reversing gear set including a first drive gear connected to the rotation drive member. When the rotating part 12 rotates in different directions, the rack structure can mesh with the first drive gear to switch the rotation direction of the rotation drive member, so that the prongs of the plug assembly extend or retract relative to the main body 11.

[0045] Specifically, the rack structure can be a partial rack structure provided on the circumferential inner sidewall of the rotating part 12. That is, the partial rack structure extends along the circumferential direction of the circumferential sidewall of the rotating part 12, and the partial rack structure does not cover the entire circumference (360°) of the inner sidewall of the rotating part, but only occupies a portion of the angle in the circumferential direction.

[0046] For example, such as Figure 3C As shown, the rack structure can be specifically located on the circumferential outer wall of the rotating part 12. In this case, when the rack structure meshes with a gear in the reversing gear set (e.g., the first gear 201), it is in an external meshing relationship; or, as shown... Figure 3A As shown, the rack structure can be specifically located on the circumferential inner wall of the rotating part 12. When the rack structure meshes with a gear (e.g., the first gear 201) in the reversing gear set, it is in an internal meshing relationship. Here, there is no limitation on whether the rack structure is located on the inner or outer wall of the rotating part.

[0047] In some embodiments, the rotation drive includes a rotating rod and a threaded transmission portion disposed on the outer circumferential surface of the rotating rod. The reversing gear set further includes a lever gear coaxially disposed on the rotating rod body. The lever gear and the rotating rod rotate coaxially. The plug assembly also includes a base connected to the pins, the base having a threaded through hole adapted to the threaded transmission portion, and the rotation drive passing through the threaded through hole.

[0048] The threaded transmission part can be an external thread, such as a threaded rod formed by adding an external thread to a rotating rod. In this case, the corresponding threaded through hole in the base is an internal thread that mates with the external thread. The threaded transmission part can also be a threaded groove. In this case, the corresponding threaded through hole in the base has a protrusion that mates with the threaded groove. This allows the base of the corresponding plug assembly to rise or fall along the axial direction of the rotating drive component when the rotating drive component rotates clockwise or counterclockwise, corresponding to the prongs of the plug assembly extending or retracting. In some embodiments, the rod gear and the threaded transmission part can be fixedly connected to the rotating rod by bonding, interference fit, or other methods. In other embodiments, the rod gear, rotating rod, and threaded transmission part can be a single integral structure, which reduces the number of parts, improves transmission efficiency, enhances the stability of the rotating drive component, and facilitates manufacturing.

[0049] In some embodiments, when there are multiple plug assemblies, the drive mechanism includes multiple rotary drive members and multiple reversing gear sets, the reversing gear sets further including a second drive gear driven by a first drive gear; wherein each plug assembly corresponds to one rotary drive member and one reversing gear set; when the rotating part 12 rotates, the rack structure can mesh with either the first drive gear or the second drive gear to switch the rotation direction of the rotary drive member, causing the prongs of the corresponding plug assembly to extend or retract relative to the body 11. For example, when the rack structure meshes with the first drive gear, the first drive gear can drive the prongs of the corresponding plug assembly to extend relative to the body 11; when the rack structure meshes with the second drive gear, the second drive gear can drive the prongs of the corresponding plug assembly to retract relative to the body 11. For example, when the rack structure meshes with the second drive gear, the second drive gear can drive the prongs of the corresponding plug assembly to extend relative to the body 11; when the rack structure meshes with the first drive gear, the first drive gear can drive the prongs of the corresponding plug assembly to retract relative to the body 11.

[0050] The following describes three embodiments of the drive mechanism, taking the rotating part 12 as cylindrical and the rotating rod and the threaded transmission part forming a threaded screw as an example. The first and second drive gears can both be connected to the lever gear; or, the lever gear can be configured as either the first or second drive gear, meaning the lever gear itself is either the first or second drive gear.

[0051] In the first embodiment, both the first and second drive gears are connected to the lever gears via transmission. The rack structure includes an arc-shaped first rack 121. The first and second drive gears are respectively disposed on both sides of the lever gear. When the rack structure is engaged with the first drive gear, the corresponding pin extends (or retracts); when the rack structure is engaged with the second drive gear, the corresponding pin retracts (or extends). The reversing gear set also includes a driven gear, which is connected to the lever gear and the first drive gear, or to the lever gear and the second drive gear; or, the reversing gear set includes multiple driven gears, which are respectively connected to the lever gear and the first drive gear, and to the lever gear and the second drive gear.

[0052] Taking the first plug assembly 21 as an example, and referring to its corresponding rotary transmission component and reversing gear set as the first transmission assembly. Figure 2A and 2G As shown, the first reversing gear set 191 includes a first driving gear, a second driving gear, and three driven gears, for a total of five gears. For ease of explanation, they are referred to as the first gear 201, the second gear 202, the third gear 203, the fourth gear 204, and the fifth gear 205, respectively. The first gear 201 and the fifth gear 205 are the first and second driving gears, respectively, while the second gear 202, the third gear 203, and the fourth gear 204 are all driven gears. Along the circumference of the rotating part 12, the first gear 201 and the second gear 202 are located on one side of the first threaded screw 131, while the third gear 203, the fourth gear 204, and the fifth gear 205 are located on the other side of the first threaded screw 131. The rack structure includes a first rack 121. When the rotating part 12 rotates, the first rack 121 meshes with the first gear 201 and the fifth gear 205 at different times. This meshing connection is an internal meshing connection, similar to the contact between the internal gear ring of a large gear and the external teeth of a small gear. The meshing connection between the gears and the lever gears in the reversing gear set is an external meshing connection, similar to the contact between the external teeth of two gears. For ease of explanation, the term "meshing connection" will be used throughout the following description. It is understood that when two gears are externally meshed, their rotation directions are opposite; when two gears are internally meshed, their rotation directions are the same. When the first rack 121 meshes with the first gear 201, the first rack 121 is connected to the first threaded screw 131 via the second gear 202 and rotates clockwise; when the first rack 121 meshes with the fifth gear 205, the first rack 121 is connected to the first threaded screw 131 via the third gear 203 and the fourth gear 204 and rotates counterclockwise.

[0053] In some embodiments, at least one of the first drive gear, the second drive gear, and the driven gear is a compound gear, referred to as the first compound gear. The first compound gear has a first lower tooth portion and a first upper tooth portion offset along the axial direction of the first compound gear. The first compound gear is connected to the lever gear for transmission, and the number of teeth in the first lower tooth portion is the same as the number of teeth in the first upper tooth portion; or, the number of teeth in the first upper tooth portion is greater than the number of teeth in the first lower tooth portion. In this embodiment, both the second gear 202 and the third gear 203 are first compound gears. In other embodiments, the first drive gear and the second drive gear may also be first compound gears. When the number of teeth in the first lower tooth portion and the first upper tooth portion is the same, although the transmission ratio does not change, by setting the compound gear, the gears can be partially stacked in the axial space, which can reduce the arc length occupied by the reversing gear set along the circumference of the rotating part 12 and maximize the utilization of its installation space in the lower cover 27.

[0054] When there are multiple first compound gears, they can be arranged in groups along the circumference of the rotating part on both sides of the lever gear. When the rotating part rotates in the first direction, power is input through the first lower tooth of the first-stage first compound gear on one side of the lever gear, and output to the lever gear through the first upper tooth of the last-stage first compound gear on that side; when the rotating part rotates in the second direction, power is input through the first lower tooth of the first-stage first compound gear on the other side of the lever gear, and output to the lever gear through the first upper tooth of the last-stage first compound gear on that side.

[0055] When the number of teeth on the first upper gear is greater than the number of teeth on the first lower gear, the transmission ratio is greater than 1. Compared to the meshing of a small-number gear and a large-number gear, a larger transmission ratio can be obtained in a limited space. At this time, the transmission ratios on both sides of the lever gear are the same, which can be achieved by setting the same number of first compound gears on both sides. A gear mounting position 271 is provided on the side of the lower cover 27 opposite to the upper cover 26 for fixing each gear in the first reversing gear set 191. The gear mounting position 271 also includes an arc-shaped guard plate, the inner wall shape of which is adapted to part of the outer contour of the first reversing gear set 191. This arrangement makes it less likely for the gears to wobble when rotating, and prevents their shafts from shifting.

[0056] The working principle of the first plug assembly 21 is described below.

[0057] Specifically, when the rotating part 12 rotates in the first direction, the first rack 121 meshes with the first gear 201, causing the first gear 201 to rotate in the first direction. The first gear 201 then meshes with the lower first tooth of the second gear 202, causing the second gear 202 to rotate in the second direction. At this time, the lower first tooth serves as the transmission input end. The upper first tooth of the second gear 202 meshes with the first lever gear 141, causing the first threaded screw 131 to rotate in the first direction. At this time, the upper first tooth serves as the transmission output end. The rotation direction of the first threaded screw 131 is the same as the rotation direction of the rotating part 12.

[0058] The circumferential arc length of the first rack 121 is less than the circumferential distance between the first gear 201 and the fifth gear 205. This ensures that after the first rack 121 disengages from the first gear 201, it engages with the fifth gear 205 only as the rotating part 12 continues to rotate in the first direction. In other words, the first rack 121 will not simultaneously engage with both the first gear 201 and the fifth gear 205, thus ensuring asynchronous meshing during the reversing process.

[0059] When the rotating part 12 continues to rotate in the first direction, the first rack 121 meshes with the fifth gear 205, causing the fifth gear 205 to rotate in the first direction. The fifth gear 205 then meshes with the fourth gear 204, causing the fourth gear 204 to rotate in the second direction. The fourth gear 204 meshes with the first layer of the third gear 203, causing the third gear 203 to rotate in the first direction. The second layer of the third gear 203 meshes with the first lever gear 141, causing the first threaded screw 131 to rotate in the second direction. At this time, the rotation direction of the threaded screw is opposite to the rotation direction of the rotating part 12.

[0060] As described above, when the first rack 121 meshes with the first gear 201, it drives the first threaded screw 131 to rotate through a three-stage meshing (first gear 201, second gear 202, and first lever gear 141) to achieve rotation in the first direction. When the first rack 121 meshes with the fifth gear 205, it drives the first threaded screw 131 to rotate through a four-stage meshing (fifth gear 205, fourth gear 204, third gear 203, and first lever gear 141) to achieve rotation in the second direction. At this time, the number of meshing gears that drive the first threaded screw 131 to switch between rotation in the first and second directions (i.e., clockwise and counterclockwise rotation) differs by one. Let the number of engagements when the first rack 121 drives the first threaded screw 131 to rotate in a first direction be the first engagement number, and let the number of engagements when the first rack 121 drives the first threaded screw 131 to rotate in a second direction be the second engagement number. The absolute value of the difference between the first engagement number and the second engagement number is an odd number. It can be understood that "engagement number" refers to the number of transmission stages in a gear transmission. Specifically, the direct meshing and transmission of power between two transmission elements (such as rack and gear, or gear and gear) is counted as one engagement number or one transmission stage.

[0061] It should be noted that in the above embodiment, along the radial direction of the rotating part 12, the shafts of the first drive gear and the second drive gear are close to the first rack 121, while the shafts of the other gears are far from the first rack 121. Therefore, only the first drive gear and the second drive gear can directly mesh with the first rack 121.

[0062] like Figure 2A , 2B As shown. The first plug assembly 21 includes a first base 251 and a first pin 241. The first pin 241 includes three pins, namely "E (Earth), L (Live), N (Null)", where the E pin 2411 is the ground wire, the L pin 2412 is the live wire, and the N pin 2413 is the neutral wire, and the three pins are arranged in a triangular pattern. The first base 251 is made into a shape that adapts to the three pins and includes a first component 2512 and a second component 2513 that are connected to each other, wherein the L pin 2412 and the N pin 2413 are fixedly connected to the first component 2512, and the L pin 2412 is fixedly connected to the second component 2513. The first base 251 includes a first threaded through hole 151, and a first threaded rod 131 passes through the first threaded through hole 151. The threads of the two are adapted to each other, so that the first threaded rod 131 can rotate within the first threaded through hole 151. Preferably, the first threaded through hole 151 is provided at the end where the second component 2513 is connected to the first component 2512, so that the first plug assembly 21 is evenly loaded on the first threaded screw 131.

[0063] When the first rack 121 drives the first threaded screw 131 to rotate in the first direction, the first base 251 of the first plug assembly 21 rises, causing the first pin 241 to extend; when the first rack 121 drives the first threaded screw 131 to rotate in the second direction, the first base 251 of the first plug assembly 21 descends, causing the first pin 241 to retract.

[0064] In summary, as the rotating part 12 rotates, when the first rack 121 meshes with the first gear 201 (first drive gear) in the first reversing gear set 191, the first pin 241 of the first plug assembly 21 gradually extends until its effective part that mates with the socket is fully extended out of the main body 11, and is in the pluggable position; when the first rack 121 meshes with the fifth gear 205 (second drive gear), the first pin 241 of the first plug assembly 21 gradually retracts its previously extended part completely into the main body 11, and is in the retracted position. The structures of the second transmission assembly and the third transmission assembly are similar to those of the first transmission assembly, each including a threaded screw, a lever gear, and a reversing gear set, and will not be described in detail further.

[0065] like Figure 2A , 2G As shown in the figure, to facilitate the differentiation of the three transmission components corresponding to the three plug assemblies, the labels indicate the first threaded screw 131, the first gear 141, and the first reversing gear set 191 in the first transmission component; the second threaded screw 132, the second gear 142, and the second reversing gear set 192 in the second transmission component; and the third threaded screw 133, the third gear 143, and the third reversing gear set 193 in the third transmission component.

[0066] like Figures 2C to 2E As shown, the second plug assembly 22 includes a second base 252 and a second pin 242, and the third plug assembly 23 includes a third base 253 and a third pin 243. Each plug assembly has a threaded through hole on its base, and a corresponding threaded rod passes through the corresponding threaded through hole. For ease of differentiation in the figure, the labels indicate the first threaded through hole 151 in the first plug assembly 21, the second threaded through hole 152 in the second plug assembly 22, and the third threaded through hole 153 in the third plug assembly 23.

[0067] As explained above, it is understood that as the rotating part 12 continues to rotate, the first rack 121 will mesh with the first gear 201 and the fifth gear 205 in the second reversing gear set 192 included in the second transmission assembly, causing the second pin 242 of the second plug assembly 22 to extend and retract. Then, the first rack 121 will mesh with the first gear 201 and the fifth gear 205 in the third reversing gear set 193 included in the third transmission assembly, causing the third pin 243 of the third plug assembly 23 to extend and retract. The movement of the second plug assembly 22 and the third plug assembly 23 is similar to that of the first plug assembly 21, and will not be described again.

[0068] Since the various plug assemblies and their corresponding transmission assemblies are spaced apart circumferentially along the rotating part 12, when the rotating part 12 continues to rotate in the first direction, each pin will alternately extend out of the main body 11 and retract into the main body 11. In summary, the user only needs to operate one component, namely, rotating the knob 124 of the rotating part 12, to select the desired pin for use, making the adapter of this application very convenient to use.

[0069] The rotating part 12 and the transmission assembly are connected by gear meshing, which allows the user to have a better feel when rotating the knob 124 of the rotating part 12.

[0070] In other embodiments, when there is only one plug assembly, the prongs can be extended and retracted by simply using a lead screw as the first drive gear and engaging with the first rack 121. For example, the prongs extend when the rotating part 12 rotates in the first direction, and retract when the rotating part 12 rotates in the second direction.

[0071] Understandably, the length of the threaded rod and the height to which the plug assembly rises are matched to the length of the prongs extending. For example, when the prongs extend 18mm, the height they rise along the threaded rod is also 18mm.

[0072] In the above embodiments, such as Figure 2A As shown, by setting a first compound gear with a transmission ratio greater than 1 in the reversing gear set, when the first rack 121 meshes with the first gear 201 or the fifth gear 205 for a certain number of teeth, the threaded screw can rotate more turns. At this time, the number of thread turns of the threaded screw is also greater, making the movement of the plug assembly smoother, that is, easier to raise and lower.

[0073] Specifically, the number of teeth on the upper teeth of the two compound gears in the gear set, the second gear 202 and the third gear 203, is the same as the number of teeth on the first gear 201, the fourth gear 204, the fifth gear 205, and the lever gear, and is denoted as the first-level tooth count, for example, N. The number of teeth on the second-level gears of the second gear 202 and the third gear 203 is denoted as the second-level tooth count, which can be set to 2N. In this case, the second-level tooth count is twice the first-level tooth count, i.e., the transmission ratio is 2. The first rack 121 meshes with the first gear 201, so that when the first gear 201 rotates one revolution, the corresponding threaded rod rotates two revolutions; the first rack 121 meshes with the fifth gear 205, so that when the fifth gear 205 rotates one revolution, the corresponding threaded rod rotates two revolutions. This setting allows the threaded rod to rotate more revolutions when the plug assembly rises to the same height, allowing for a denser thread design. This reduces the resistance felt by the user when driving the rotating part 12, making the operation smoother and easier, and improving the user experience. More rotations correspond to finer linear displacement, enabling more precise positioning of the plug assembly. Simultaneously, a reduced thread lead means a lower thread helix angle. A smaller thread helix angle enhances the self-locking capability of the threaded drive, ensuring the plug assembly locks securely once it reaches the mating position, effectively preventing accidental retraction due to compression during mating. Furthermore, to address the potential for increased friction from the increased rotations, the threaded rod can be made of self-lubricating engineering plastics or have lubricating grooves on its surface, increasing its long-term durability.

[0074] In other embodiments, the number of teeth in the first stage and the number of teeth in the second stage can be set to different proportional relationships. For example, the transmission ratio can be set to 0.5 to 3.

[0075] In some embodiments, the transmission ratio of the drive mechanism (reversing gear set) is preset according to the stroke requirements of the plug assembly. Specifically, the moving distance of the plug assembly between the retracted position and the pluggable position is H (this value of H is usually determined with reference to the length of a specific specification pin). According to the principle of threaded transmission, if the lead of the rotating drive (threaded screw) is P, then the number of rotations required to complete the stroke H is n (n = H / P). In order to optimize the operating experience and reduce the size of the device, the rotating part 12 drives the rotating drive through the reversing gear set with a preset transmission ratio. This application adjusts the effective circumference and number of teeth of the rotating part 12 (such as the first rack 121) and the tooth ratio of each gear in the reversing gear set so that the rotating part 12 can drive the rotating drive to rotate n times within a preset rotation angle (e.g., rotating 90° or 60°, etc.), thereby completing the lifting and lowering switching of the plug assembly. This proportional relationship setting achieves the effect of short-stroke rotation triggering long-distance linear displacement, improving switching efficiency while ensuring a compact structure.

[0076] In some embodiments, when the adapter includes N plug assemblies, let the circumference of the rotating part 12 be R, and the arc length occupied by the rack structure (including the first rack 121 and the second rack 122) be L. Then L should be less than or equal to R / (N+k), and k≥1. This setting ensures that when one plug assembly is driven to the pluggable position, the other plug assemblies are in the retracted position.

[0077] For example, in a specific embodiment, when N is 3, in order to reduce the volume of the rotating part 12, the bottom diameter of the rotating part 12 is in the range of 50mm to 60mm (e.g., 54mm), and its circumference is in the range of 157mm to 188mm (e.g., 170mm). At this time, in order to ensure the redundancy of the switching space, the arc length L of the first rack 121 can be designed to be less than or equal to one-quarter of the circumference (e.g., less than 42.5mm).

[0078] In some embodiments, the lead screw can also be selected as a sliding lead screw structure with a self-locking function. To ensure the stability of the plug assembly in the mating position, the thread helix angle of the lead screw... The lead angle is configured to be less than or equal to the equivalent friction angle between its materials. Specifically, the thread helix angle... The lead P and the thread pitch diameter d satisfy the following formula: According to the principle of mechanical self-locking, when the thread helix angle... When the thread helix angle is small, reducing the rise slope of the threaded wire ensures that when the plug assembly is subjected to a reverse force in the axial direction, the frictional torque generated between the threaded surfaces is greater than or equal to the reverse driving torque, thus achieving self-locking. This design allows the plug assembly to maintain its position when in the pluggable position and under force, preventing it from retracting due to external forces, thereby improving the stability and safety of the connection. Simultaneously, by optimizing the thread helix angle design, the operating torque and positioning reliability are balanced, resulting in smoother movement of the plug assembly between the retracted and pluggable positions without jamming.

[0079] In some embodiments, the lever gear is configured as a first drive gear or a second drive gear; the rack structure includes a first rack 121 and a second rack 122, both of which are arc-shaped; wherein the first rack 121 and the second rack 122 are spaced apart along the circumferential direction of the rotating part 12 and are offset along the axial direction of the rotating part 12; the first drive gear and the second drive gear are offset in the axial direction and partially meshed; in the axial direction of the rotating part 12, the position of the first rack 121 is adapted to the position of the first drive gear, and the position of the second rack 122 is adapted to the position of the second drive gear.

[0080] In the second set of embodiments, the first plug assembly 21 and its corresponding first transmission assembly will still be used as examples for explanation.

[0081] As described in the first set of embodiments, the number of driven gears that drive the lead screw to rotate in the first direction and the second direction differs by one, meaning the number of engagements differs by one. Therefore, in some embodiments, a total number of gears between 2 and 11 is suitable. Too many gears increase cost and occupy more space. Therefore, in this set of embodiments, the number of gears is 2, namely only the first driving gear and the lever gear (in this case, the lever gear is the second driving gear). Furthermore, in this set of embodiments, the rack structure includes two arc-shaped racks at different heights and two corresponding gears at different heights, enabling the lead screw to rotate in the first and second directions.

[0082] Specifically, such as Figure 3A , Figure 3B As shown, the first reversing gear set 191 includes a first drive gear, still referred to as the first gear 201. Along the circumferential direction of the inner sidewall of the rotating part 12, the second rack 122 is adjacent to and spaced apart from the first rack 121. At the same time, along the axial direction of the rotating part 12, the first rack 121 and the second rack 122 are at different horizontal heights.

[0083] In some embodiments, the second rack 122 and the first gear 141 are positioned at the same height, and the first rack 121 is positioned at the same height as the first gear 201. The second rack 122 is closer to the direction in which the pin extends than the first rack 121. The first gear 201 and the first gear 141 are axially offset and partially meshed. As the rotating part 12 rotates to a certain angle, the first rack 121 meshes with the first gear 201; and as the rotating part 12 rotates to another angle, the second rack 122 meshes with the first gear 141. Specifically, the first rack 121 meshes with the end of the first gear 201 away from the direction in which the pin extends, the second rack 122 meshes with the end of the first gear 141 near the direction in which the pin extends, and the end of the first gear 201 near the direction in which the pin extends meshes with the end of the first gear 141 away from the direction in which the pin extends.

[0084] Specifically, in this embodiment, the rotation direction of the rotating part 12 is the second direction. When the rotating part 12 rotates in the second direction, the first rack 121 meshes with the first gear 201, causing the first gear 201 to rotate in the second direction. The first gear 201 also meshes with the first lever gear 141, causing the first lever gear 141 to rotate in the first direction, resulting in the first pin 241 gradually extending out of the main body 11. When the rotating part 12 continues to rotate in the second direction, and the first rack 121 disengages from the first gear 201, the second pin 242 extends to the insertion position. When the rotating part 12 continues to rotate in the second direction, and the second rack 122 meshes with the first lever gear 141, the first threaded screw 131 rotates in the second direction, causing the first pin 241 to gradually retract its previously extended portion into the main body 11. When the second rack 122 disengages from the first lever gear 141, the first pin 241 retracts to the storage position.

[0085] Compared to the first set of embodiments, since the second set of embodiments does not have a multi-stage gear acceleration process, the lead screw needs to extend the pins by the same length when the number of rotations is less. Therefore, the number of threaded turns of the lead screw is less, and the user needs to use more force to drive the rotating part 12 to rotate. However, in this set of embodiments, the number of gears is reduced, that is, the number of parts is reduced, thereby reducing the assembly difficulty.

[0086] The prongs of other plug components can refer to the process of prongs extending and retracting of the first plug component 21 described above, and will not be repeated here.

[0087] In some embodiments, the arc length distance between two adjacent threaded screws along the circumferential direction is defined as the first spacing, and the arc length distance between the starting position of the first rack 121 and the ending position of the second rack 122 is defined as the second spacing. By setting the first spacing to be greater than the second spacing, during the rotation of the rotating part 12, one pin can be completely retracted into the main body 11 before the other pin begins to extend out of the main body 11, thereby ensuring that the pins do not interfere with each other.

[0088] In some embodiments, both the first drive gear and the second drive gear are connected to the gear transmission; the rack structure includes a first rack 121 and a second rack 122, both of which are arc-shaped; wherein the first rack 121 and the second rack 122 are spaced apart along the circumferential direction of the rotating part 12; in the axial direction of the rotating part 12, the position of the first rack 121 is adapted to the position of the first drive gear, and the position of the second rack 122 is adapted to the position of the second drive gear.

[0089] The first drive gear and the second drive gear can be arranged on both sides of the lever gear along the circumference of the rotating part 12. It can be understood that, in this case, the rack structure in the first embodiment can be correspondingly set as the first rack 121 and the second rack 122.

[0090] In this embodiment, the first drive gear and the second drive gear can be arranged on the same side of the lever gear along the circumference of the rotating part 12. In the third set of embodiments, the third transmission assembly will be used as an example for explanation.

[0091] like Figures 4A to 4C As shown, Figure 4A This is a top view schematic diagram of another embodiment of the working module of this application; Figure 4B yes Figure 4A A schematic diagram showing the hidden rotating part 12. Figure 4C yes Figure 4A A schematic diagram of the transparent rotating part 12 from another angle. The gear set of the third transmission assembly (shown as the third reversing gear set 193) includes two gears, a first gear 201 (first drive gear) and a second gear 202 (second drive gear), both located on the same side of the third threaded screw 133 along the circumferential direction of the rotating part 12. Further, the second gear 202 (second drive gear) can also be a compound gear, having a second lower tooth portion 2023 and a second upper tooth portion 2024. The rack structure includes a first rack 121 and a second rack 122. Along the circumferential direction of the inner sidewall of the rotating part 12, the second rack 122 is adjacent to and spaced apart from the first rack 121. At the same time, along the axial direction of the rotating part 12, the first rack 121 and the second rack 122 are located at different horizontal heights.

[0092] like Figure 4C As shown, the first gear 201 and the second gear 202 are relatively long along the axial direction. The first gear 201 has a first meshing section 2011 and a second meshing section 2012 in the axial direction, and the second lower tooth portion 2023 of the second gear 202 has a third meshing section 2021 and a fourth meshing section 2022 in the axial direction. The second meshing section 2012 of the first gear 201 meshes with the third meshing section 2021 of the second lower tooth portion 2023, and the lower tooth portion of the second gear 202 meshes with the third linkage gear 143. As the rotating part 12 rotates to a certain angle, the first rack 121 meshes with the first meshing section 2011 of the first gear 201, and the second rack 122 meshes with the fourth meshing section 2022 of the second lower tooth portion 2023 of the second gear 202.

[0093] The meshing connection between the first rack 121 and the first drive gear (first gear 201), and the meshing connection between the second rack 122 and the second drive gear (second gear 202), respectively cause the third threaded screw 133 to rotate in the first direction or the second direction, thereby realizing the raising and lowering of the third pin 243. That is to say, if the number of meshings between the first rack 121 and the gear is defined as the first meshing number, and the number of meshings between the second rack 122 and the gear is defined as the second meshing number, and the absolute value of the difference between the first meshing number and the second meshing number is odd, then the first rack 121 and the second rack 122 can drive the third pin 243 to rise and fall respectively.

[0094] Similar to the first set of embodiments, the second lower teeth 2023 of the first gear 201 and the second gear 202 have the same number of teeth as the lever gears, representing the first-order number of teeth. The second upper teeth 2024 of the second gear 202 have the same number of teeth, representing the second-order number of teeth. The ratio of the second-order number of teeth to the first-order number of teeth can be designed to be greater than 1, thereby enabling the threaded screw to accelerate in both directions of rotation, i.e., the transmission ratio is greater than 1. For example, in one embodiment, the transmission ratio is 2, the first-order number of teeth is 8, and the second-order number of teeth is 16; or, in another embodiment, the transmission ratio is 1.5, the first-order number of teeth is 8, and the second-order number of teeth is 12. The transmission ratio can also be 3, etc. Its beneficial effects are similar to those in the first set of embodiments and will not be repeated here.

[0095] At this time, the diameter of the second lower tooth 2023 of the second gear 202 is larger than the diameter of the second upper lower tooth, such as Figure 4B As shown, at the position of the lower cover 27 corresponding to the second upper tooth 2024, there is a notch that matches the outer contour shape of the lower tooth, so that the rotation of the second gear 202 will not be hindered.

[0096] In the second and third sets of embodiments, the first rack 121 and the second rack 122 have the same number of teeth to ensure that the angular displacement of the threaded screw is consistent during rotation in both directions, thereby achieving accurate matching of the rising height and falling height of the plug assembly.

[0097] In addition, the number of teeth of the first rack 121 or the second rack 122 is related to the transmission ratio. The number of teeth of the first rack 121 ÷ the number of teeth of the lever gear × (the number of teeth of the second upper tooth 2024 ÷ the number of teeth of the second lower tooth 2023) = the number of rotations of the lead screw, that is, the transmission ratio of the drive mechanism.

[0098] For example, in the first embodiment, the rotating part 12 includes a rack, namely the first rack 121, and the gear set includes five gears. The first rack 121 has 15 teeth; the first gear 201 has 8 teeth; the first lower tooth of the second gear 202 (the first compound gear) has 8 teeth; the first upper tooth of the second gear 202 has 16 teeth; and when the number of teeth of the lever gear is 8, the transmission ratio of the drive mechanism is 15 ÷ 8 × 2 = 3.75.

[0099] In the second embodiment, the rotating part 12 includes two racks, namely a first rack 121 and a second rack 122, and the gear set includes a gear. The first rack 121 and the second rack 122 both have 20 teeth, and the first gear 201 has 8 teeth. When the number of teeth of the lever gear is 8, the transmission ratio of the drive mechanism is 20 ÷ 8 = 2.5.

[0100] In the third embodiment, the rotating part 12 includes two racks, namely a first rack 121 and a second rack 122, and the gear set includes two gears. The first rack 121 and the second rack 122 both have 20 teeth. The first gear 201 has 8 teeth. The second lower tooth 2023 of the second gear 202 (the second compound gear) has 8 teeth, and the second upper tooth 2024 of the second gear 202 has 12 teeth. When the number of teeth of the lever gear is 8, the transmission ratio of the drive mechanism is 20 ÷ 8 × 1.5 = 3.75.

[0101] As can be seen, compared with the above three sets of embodiments, the second set of embodiments has the fewest gears but the lowest transmission ratio; the third set of embodiments has the same transmission ratio as the first set of embodiments, and has fewer gears. In comparison, the third set of embodiments uses fewer gears to achieve faster rotation of the threaded screw, thereby allowing for the design of more thread turns on the threaded screw, making it easier for users to drive the rotating part 12 to rotate and improving the user experience.

[0102] The prongs of other plug components can refer to the prong extension and retraction process of the third plug component 23 described above, and will not be repeated here. In some embodiments, such as Figure 4B As shown, since the length of the lever gear and the second gear 202 exposed above the lower cover 27 is relatively long, and their central shafts are relatively thin, the fixing caps 31 fitted on the central shafts of the lever gear and the second gear 202 can strengthen the central shafts, making the rotation of the second gear 202 and the lever gear more stable, and can also prevent damage when the number of rotations is too many.

[0103] It should be noted that the first transmission component exerts a constraint force on the first plug assembly 21, which prevents it from rotating together with the threaded screw and instead causes it to move linearly along the axial direction of the threaded screw. To ensure more stable rising and falling of the plug assembly, the constraint force exerted by the transmission component can be implemented in various ways, such as by providing a guide rail or slide groove fixedly connected to the upper cover 26 or the lower cover 27, and by providing a support arm in the plug assembly, allowing the support arm to slide in connection with the guide rail or slide groove.

[0104] In some embodiments, such as Figure 1H , Figures 2B to 2F As shown, each transmission component also includes at least one guide post. Correspondingly, the base of the plug assembly is provided with a guide hole, and the guide post passes through the guide hole. A receiving cavity is formed between the upper cover 26, the lower cover 27, and the rotating part 12, and the transmission component is disposed in the receiving cavity. Mounting holes corresponding to the guide posts of each plug assembly are provided in the upper cover 26 and the lower cover 27. The two ends of the guide post are respectively inserted into the mounting holes of the upper cover 26 and the lower cover 27, so that the guide post is fixedly connected to the upper cover 26 and the lower cover 27. The guide posts corresponding to each plug assembly are spaced apart in the receiving cavity along the circumferential direction of the rotating part 12. At the same time, the guide post slides through the corresponding guide hole along its own axial direction. By setting the guide post, the base of the plug assembly moves linearly up and down in the direction pointed to by the two ends of the guide post during the rotation and descent of the threaded screw, and the movement is more stable and smoother.

[0105] As shown in the figure, the first transmission component includes a first guide post 161, which passes through a first guide through hole 171 in the first base 251 of the first plug assembly 21; the second transmission component includes a second guide post 162, which passes through a second guide through hole 172 in the second base 252 of the second plug assembly 22; and the third transmission component includes a third guide post 163, which passes through a third guide through hole 173 in the third base 253 of the third plug assembly 23.

[0106] The inner wall of the guide hole is smooth, and a lubricating layer is coated between the outer wall of the guide post and the inner wall of the guide hole to reduce frictional resistance during relative sliding, thereby ensuring the smooth up-and-down movement of the base of each plug assembly along the guide post.

[0107] In some embodiments, such as Figure 2BAs shown, the first plug assembly 21 includes two first guide through holes 171, which are respectively disposed on the first component 2512 and the second component 2513 of the first plug assembly 21. Correspondingly, the first transmission assembly is provided with two first guide posts 161, each of which passes through a first guide through hole 171. This arrangement allows the side containing the E-pole 2411 (first component 2512) and the side containing the L-pole 2412 and N-pole 2413 (second component 2513) of the first pin 241 to rise and fall synchronously on the same horizontal plane during the rising and falling process.

[0108] In some embodiments, since both the second pin 242 and the third pin 243 are two-prong pins, a second guide hole 172 is provided on the second base 252 of the second plug assembly 22, and a second guide post 162 is provided in the corresponding second transmission assembly; a third guide hole 173 is provided on the third base 253 of the third plug assembly 23, and a third guide post 163 is provided in the corresponding third transmission assembly.

[0109] In some embodiments, such as Figures 2B to 2E As shown, each plug assembly also includes two electrode pieces 181, which are disposed on the base. The two electrode pieces 181 of the first pin 241 are respectively disposed at both ends of the L-pin 2412 and the N-pin 2413. The two electrode pieces 181 of the second pin 242 are disposed at both ends of the two pins. The two electrode pieces 181 of the third pin 243 are disposed at both ends of the two pins.

[0110] like Figure 2F The image shows a top view of the placement of the three plug components. The first plug 241 has two rows of pins: one row for the E (E) pin 2411, and the other row for the L (L) pin 2412 and N (N) pin 2413. The width of the second plug 242 is suitable for placement between the two rows of pins on the first plug 241. The third plug 243 is placed on the side closest to the L (L) pin 2412 and N (N) pin 2413. The corresponding sockets for each plug are also arranged accordingly. This spatial layout ensures a compact and rational overall structure, which is beneficial for the miniaturization of the adapter and makes it easier for users to carry.

[0111] When the plug components included in the adapter are combinations of other national standards, the adapter can be miniaturized by arranging the pins of each plug component according to the spacing between the pins of each specification and by designing the shape of the base.

[0112] In some embodiments, the adapter further includes: a charging module disposed on a circuit board 29; a charging interface 28 disposed on a main body 11; and a retractable cable module 30, including a retractable charging cable 301 for connecting to an external electronic device; wherein the charging module, the charging interface 28, and the retractable cable module 30 are all electrically connected to the circuit board 29; and, within the main body 11, along the radial direction of the rotating part 12, the circuit board 29 and the retractable cable module 30 are spaced apart from the rotating part 12. In this case, the adapter can adapt to various plug specifications and can also be used as a charger.

[0113] like Figure 1H As shown, in some embodiments, the electrode is a ring electrode 18. Corresponding to a pair of electrode plates 181 for each pin, a pair of electrode clips 182 are provided. Three pairs of electrode clips 182 are connected together to form the ring electrode 18, which is fixed inside the upper cover 26. It should be noted that, based on the different live and neutral wires of the power supply, the ring electrode 18 consists of two independently insulated parts. Each of these two parts of the ring electrode 18 is provided with three electrode clips 182, which are respectively connected to the electrode plates 181 of the three plug assemblies. When there is only one plug assembly, the electrode that can achieve electrical connection with the pins can also be set to other shapes. When the adapter is powered through a plug assembly, the pins of that plug assembly are electrically connected to the electrode plates 181, the ring electrode 18, and the charging module. The ring electrode 18 can be electrically connected to the circuit board 29 via a wire.

[0114] In this embodiment, since the annular electrode 18 is positioned in the direction of the prong extension and the circuit board 29 is positioned in the direction of the prong retraction, a telescopic cable module 30 is also provided above the charging module. Therefore, to simplify the wiring design, two second guide posts 162 are provided in the second base 252 of the second plug assembly 22. The second guide posts 162 are also conductive. One end of each second guide post 162 near the annular electrode 18 is connected to the annular electrode 18, and the other end extends out from the lower cover 27, connecting to the positive and negative power terminals respectively. The positive and negative power terminals are electrically connected to the circuit board 29 and are located on the side of the lower cover 27 away from the prongs.

[0115] In some embodiments, a protective plate is provided on the side of the lower cover 27 away from the pins. The protective plate has holes corresponding to each gear in the gear set, which fix and restrict these gears between the lower cover 27 and the protective plate, thereby enhancing the stability of the meshing connection between multiple gears.

[0116] As can be seen, when the plug assembly is in the retracted position, its pins are not connected to the circuit board 29; when the plug assembly is in the pluggable position, its pins extend upwards from the main body 11, and the two electrode plates 181 contained therein are inserted into the corresponding electrode elastic clips 182. At this time, the pin is connected to the circuit board 29, while the other pins remain disconnected from the circuit board 29. This ensures the safety of the adapter. Various electronic components, including transformers, rectifier bridges, power protocol chips, and capacitors, are mounted on the circuit board 29 for charging electronic devices.

[0117] In other embodiments, when the charging module is positioned in the direction closer to the protrusion of the plug (above) and the telescopic cable module 30 is positioned in the direction away from the protrusion of the plug (below), the annular electrode 18 can also be directly connected to the charging module via a wire.

[0118] In some embodiments, such as Figure 2B and Figure 5 As shown, the first plug assembly 21 also includes a lever 2511, the two ends of which are rotatably connected to the first base 251 and the E-pole 2411 pin, respectively. The upper cover 26 extends a limiting protrusion 264 along the side away from the protrusion direction, the limiting protrusion 264 being close to the socket in the first set of sockets 261 through which the E-pole 2411 pin protrudes. For UK standard plugs, the ground pin is 22mm, and the other two are 18mm. To ensure that the E-pole 2411, L-pole 2412, and N-pole 2413 pins are at the same height when the first plug 241 is in the retracted position, occupying less space, when the E-pole 2411 pin is connected to the first base 251 via the lever 2511, its bottom is on the same horizontal plane as the bottom of the first base 251, i.e., the height of the first base 251 is approximately 4mm. When the first base 251 rises to the position of the limiting protrusion 264 and continues to rise to its highest height ( Figure 5 The first base 251 is in complete contact with the upper cover 26), the limiting protrusion 264 abuts against the lever 2511, causing the lever 2511 to rotate at a certain angle, from Figure 2B The state of being parallel to the first base 251 becomes as follows Figure 5 The body is tilted so that the E-pole 2411 pin is fully extended out of the body 11, at which point the first pin 241 is in a connectable state.

[0119] In some embodiments, the third plug assembly 23, i.e., a European standard plug assembly, includes: a third base 253; a third prong 243; a storage housing 245 covering the third base 253 to form a storage space; a moving base 244 supporting the third prong 243; a secondary connecting rod 247, one end of which is rotatably connected to the moving base 244; and a main connecting rod 246, one end of which is rotatably connected to the other end of the secondary connecting rod 247, and the other end of which is rotatably connected to the lower cover 27; such that when the main connecting rod 246 and the secondary connecting rod 247 are folded, the third prong 243 is stored in the storage space to a stored position; when the main connecting rod 246 and the secondary connecting rod 247 are unfolded, the third prong 243 extends out of the storage space to a pluggable position.

[0120] Specifically, such as Figure 2C and Figure 6 As shown, the two pins of the third plug 243 are fixedly connected to the moving base 244, and the storage shell 245 covers the third base 253. When the third plug 243 is in the stored position, both the third plug 243 and the moving base 244 are stored in the storage space formed by the storage shell 245 and the third base 253. The third plug assembly 23 also includes a main connecting rod 246 and a secondary connecting rod 247. One end of the main connecting rod 246 is rotatably connected to the lower cover 27, and the other end of the main connecting rod 246 is rotatably connected to one end of the secondary connecting rod 247. The other end of the secondary connecting rod 247 is rotatably connected to the side wall of the moving base 244. The side wall of the moving base 244 is also provided with a storage position 248 corresponding to the main connecting rod 246 and the secondary connecting rod 247. When the third plug 243 is in the stored position, the main connecting rod 246 and the secondary connecting rod 247 are folded and located in the storage position 248. As the third base 253 rises with the rotation of the screw thread, it causes the main connecting rod 246 and the auxiliary connecting rod 247 to unfold, and drives the third pin 243 to extend from the housing 245. Figure 1D As shown, when the third pin 243 is in the pluggable position, the housing 245 extends from the third set of sockets 263, and the third pin 243 also extends from the housing 245. By setting the third pin 243 to be further housed within the housing 245 when it is housed inside the adapter, less space is occupied, thereby reducing the height of the adapter and making it more compact.

[0121] By configuring the first plug assembly 21 and the third plug assembly 23 as described above, these two plug assemblies occupy less space when they are in the retractable position, thereby reducing the height of the adapter, which can be set to a minimum of 30mm.

[0122] In some embodiments, by providing a threaded screw and a corresponding nut hole in the third plug assembly 23, it is also possible to achieve that when the third plug 243 extends out of the main body 11, it extends out of the main body 11 together with the housing 245, and extends out of the housing 245 to the pluggable position.

[0123] In some embodiments, such as Figure 2E , 1F As shown, the second pin 242 includes two pins connected to the second base 252, one end of which is provided with a pivot, allowing the pins to be rotatably connected to the second base 252. When the second pin 242 extends out of the main body 11, the user can manually rotate the two pins into a figure-eight shape. Simultaneously, by setting the second set of sockets 262 to a corresponding shape, the two pins of the second pin 242 can rotate within the second set of sockets 262, with the rotation angle limited by the second set of sockets 262. After rotation, the second pin 242 becomes a universal pin compatible with US, Australian, and Chinese standards, suitable for the angled holes of three-prong sockets. In some embodiments, such as Figure 2A As shown, when the adapter includes three plug assemblies, the circumference of the surface of the rotating part 12 is L. Along the circumferential direction of the rotating part 12, the arc length between two adjacent lever gears (corresponding to two adjacent threaded screws) is L / 4; that is, with the center of the upper surface of the rotating part 12 as the vertex, the included angle between them is at least 90 degrees. When the rotating part 12 includes a gear segment, the arc length of the first rack 121 is preferably less than L / 4. This arrangement ensures that when one pin is fully extended and in the pluggable position, the other pins are in the retracted position.

[0124] In some embodiments, the projected positions of the three rotating drive components (threaded screws in the figure) corresponding to the three plug assemblies on a plane perpendicular to the axis of the rotating part 12 are located at 0 degrees, 90 degrees, and 180 degrees of the circumference, respectively. That is, with the rotation axis of the rotating part 12 as the center, the included angle between the first threaded screw 131 and the third threaded screw 133 is 180 degrees, the included angle between the first threaded screw 131 and the second threaded screw 132 is 90 degrees, and the included angle between the second threaded screw 132 and the third threaded screw 133 is 90 degrees. This arrangement makes the adapter of this application easier to manufacture, and the installation position accuracy of each component is higher, thereby improving its safety in use and providing users with a better user experience.

[0125] In this embodiment, as Figure 2AAs shown, the adapter also includes a positioning mechanism disposed inside the main body 11. The positioning mechanism includes a positioning element and four positioning grooves 123 disposed on the bottom surface of the rotating part 12. The angle between any two adjacent positioning grooves 123 and the center is 90 degrees. Three of the positioning grooves 123 correspond to the positions of three threaded screws. The positioning element (not shown in the figure) is mounted on the base plate 113. For example, a mounting bracket can be provided on the base plate 113 and fixedly connected to it. The positioning element is an elastic ball bearing, which is installed in the mounting bracket. Alternatively, the positioning element can be a raised elastic wall directly disposed on the base plate 113. When all three plug components are in the retracted position, or when one plug component is in the pluggable position (four states in total), the positioning element engages with a positioning groove 123, generating sound and vibration feedback. In other embodiments, the positioning element can be disposed on the bottom surface of the rotating part, and multiple positioning grooves 123 can be disposed on the base plate 113.

[0126] This design allows the user to clearly perceive the position when rotating the knob 124 to rotate the rotating part 12 until one of the prongs is fully extended from the main body 11 and in a pluggable position. This eliminates the need to continue rotating the knob 124 and provides a satisfying "click" feel, enhancing the user experience. When the user needs to retract the prong, a slight force is required to rotate the knob 124. Therefore, when the prong is inserted into the socket, it remains stably in the pluggable position and does not retract. Furthermore, when all prongs are in the retracted position, the user can rotate the knob 124 to engage the positioning element in the positioning groove 123. At this point, the adapter is locked, meaning the positioning mechanism keeps the rotating part 12 in its current position. The user needs to apply slight force to rotate the rotating part 12, preventing it from rotating on its own in certain situations, which could cause a prong to extend from the main body 11 and scratch or damage other items. This improves the safety and user experience of using this adapter.

[0127] In some embodiments, such as Figure 1F As shown, in order to accommodate the shape of the rotating part 12, the side of the circuit board 29 closest to the rotating part 12 is curved, and there is a certain gap between it and the rotating part 12. This arrangement can reduce the length of the adapter and does not hinder the rotation of the rotating part 12.

[0128] like Figure 1FAs shown, a charging module is electrically connected to the side of circuit board 29 facing away from the protruding pins, enabling it to charge electronic devices; a retractable cable module 30 is located on the side of circuit board 29 facing the protruding pins. Transformers, capacitors, and other components are all located on the side away from the retractable cable module 30, i.e., closer to the base plate 113, to avoid interference with the retractable cable module 30. This arrangement also reduces the height of the adapter.

[0129] The retractable cable module 30 can be positioned beside the rotating part 12, arranged along the length of the adapter. This arrangement makes it easier for the user to pull out the retractable cable when inserting the adapter into the socket, and the charging cable 301 can be easily pulled out as it rotates horizontally in the cable tray. To avoid interference, the rotating part 12 and the retractable cable module 30 are spaced apart, with a spacing of approximately 0.5mm to 3mm. This spacing reduces interference and provides sufficient space for adhesive fixation, while avoiding excessive spacing, thus reducing the overall size of the product.

[0130] On the side of the circuit board 29 near the base plate 113, there are two- or three-prong adapter pin springs. The base plate 113 has corresponding AC adapter sockets, which can be used to connect AC appliances of other specifications. When the user plugs the required specification pins into the socket, they can also insert the pins of their own charger or other power supply into the AC adapter sockets. In this case, the adapter can be used as a power adapter.

[0131] The retractable cable module 30 includes a cable reel cover, a cable reel groove, and a charging cable 301. The charging cable 301 is wound in the cable reel groove, with one end electrically connected to the circuit board 29 and the other end electrically connected to a connector 302. The connector 302 passes through the charging port and protrudes from the outside of the main body 11. By pulling the connector 302, the charging cable 301 can be pulled out of and retracted from the cable reel groove. By setting up the retractable cable module 30, users do not need to prepare a separate charging cable 301 when using this adapter to charge electronic devices, thus improving user convenience.

[0132] The retractable cable module 30 can also be equipped with a spring and a self-locking mechanism. When the connector 302 is pulled out and the charging cable 301 extends, the self-locking mechanism keeps the charging cable 301 at its current length after the user releases the hand. When the user is finished using the cable, gently pulling the connector 302 and releasing it again will cause the spring to automatically retract the charging cable 301, making it convenient for the user to use.

[0133] Correspondingly, the outer casing 112 is provided with a receiving groove 1121 for storing the connector 302. A magnet is provided on the side of the receiving groove 1121 away from the connector 302 for attracting the connector 302. This allows the connector 302 to be fixed on the outer casing 112 when not in use, making it convenient for users to store and less prone to damage.

[0134] In some embodiments, the adapter may also be provided with a charging port 28, such as a USB Type-C or USB Type-A interface. Therefore, when the adapter is inserted into the socket, it is powered on, allowing electronic devices to be connected to the charging port 28 for charging by the charging module. Preferably, when the adapter is inserted into the socket, the charging port 28 is located on the side near the charging pad and facing the user, making it convenient for the user to charge multiple electronic devices simultaneously using the adapter.

[0135] Finally, it should be noted that if any directional indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of this application, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0136] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0137] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A conversion adapter, characterized in that, include: A plug assembly, the plug assembly including pins; A main body for accommodating the plug assembly, the main body having sockets corresponding to the pins of the plug assembly; A rotating part is rotatably disposed on the main body; Electrode components are housed within the main body; The circuit board is electrically connected to the electrode components; A drive mechanism is housed within the main body. The drive mechanism is connected to the rotating part and the plug assembly respectively. When the rotating part rotates, it drives the plug assembly to switch between a retractable position and a pluggable position. In the pluggable position, the prongs extend relative to the main body and are electrically connected to the electrode to enable electrical connection with an external power source. In the retractable position, the prongs retract relative to the main body.

2. The conversion adapter according to claim 1, characterized in that, The drive mechanism includes: A rack structure is circumferentially disposed on the circumferential sidewall of the rotating part; The rotating drive unit is connected to the plug assembly; A reversing gear set, including a first drive gear connected to the rotation drive member; When the rotating part rotates in different directions, the rack structure can mesh with the first drive gear to switch the rotation direction of the rotating drive member, so that the prongs of the plug assembly extend or retract relative to the main body.

3. The conversion adapter according to claim 2, characterized in that, The plug assembly is multiple, and the drive mechanism includes multiple rotary drive elements and multiple reversing gear sets. The reversing gear set also includes a second drive gear that is pulsatorically connected to the first drive gear. Each of the plug assemblies corresponds to one of the rotary drive members and one of the reversing gear sets; When the rotating part rotates, the rack structure can mesh with the first drive gear or the second drive gear respectively to switch the rotation direction of the rotating drive member, so that the corresponding plug assembly's pins extend or retract relative to the main body.

4. The conversion adapter according to claim 3, characterized in that, The rotation drive component includes a rotating rod and a threaded transmission part disposed on the outer peripheral surface of the rotating rod; The reversing gear set also includes a lever gear, which is coaxially mounted on the rotating rod body; Wherein, both the first drive gear and the second drive gear are connected to the lever gear in a transmission, or the lever gear is configured as either the first drive gear or the second drive gear.

5. The conversion adapter according to claim 4, characterized in that, Both the first drive gear and the second drive gear are connected to the lever gear transmission; the rack structure includes an arc-shaped first rack; The first drive gear and the second drive gear are respectively disposed on both sides of the lever gear.

6. The conversion adapter according to claim 5, characterized in that, The reversing gear set further includes a driven gear, which is driven between the lever gear and the first driving gear, or the driven gear is driven between the lever gear and the second driving gear; Alternatively, the reversing gear set may include a plurality of driven gears, which are respectively connected to the lever gear and the first driving gear, and to the lever gear and the second driving gear.

7. The conversion adapter according to claim 6, characterized in that, At least one of the first driving gear, the second driving gear, and the driven gear is a compound gear, referred to as the first compound gear. The first compound gear has a first lower tooth portion and a first upper tooth portion that are offset along the axial direction of the first compound gear. The first compound gear is connected to the rod gear for transmission, and the number of teeth in the first lower tooth portion is the same as the number of teeth in the first upper tooth portion; or, the number of teeth in the first upper tooth portion is greater than the number of teeth in the first lower tooth portion.

8. The conversion adapter according to claim 4, characterized in that, Both the first drive gear and the second drive gear are connected to the lever gear transmission; the rack structure includes a first rack and a second rack, both of which are arc-shaped; The first rack and the second rack are spaced apart along the circumferential direction of the rotating part; In the axial direction of the rotating part, the first rack is positioned to match the first drive gear, and the second rack is positioned to match the second drive gear.

9. The conversion adapter according to claim 8, characterized in that, The first drive gear and the second drive gear are arranged on the same side of the lever gear along the circumference of the rotating part.

10. The conversion adapter according to claim 8, characterized in that, The second drive gear is a compound gear, and the second drive gear includes a second lower tooth and a second upper tooth that are offset from each other along its axial direction; The first drive gear has a first meshing section and a second meshing section in the axial direction, and the second lower tooth has a third meshing section and a fourth meshing section in the axial direction. The third meshing section of the second lower tooth is meshed with the second meshing section, and the second upper tooth is meshed with the lever gear. When the rotating part rotates, the first rack can directly mesh with the first meshing section of the first drive gear, and the second rack can directly mesh with the fourth meshing section of the second drive gear.

11. The conversion adapter according to claim 10, characterized in that, The ratio of the number of teeth in the second upper tooth section to the number of teeth in the second lower tooth section is greater than or equal to 1.

12. The conversion adapter according to claim 4, characterized in that, The lever gear is configured as either the first drive gear or the second drive gear; the rack structure includes a first rack and a second rack, both of which are arc-shaped. The first rack and the second rack are spaced apart along the circumferential direction of the rotating part and staggered along the axial direction of the rotating part. The first drive gear and the second drive gear are axially offset and partially meshed; In the axial direction of the rotating part, the first rack is positioned to match the first drive gear, and the second rack is positioned to match the second drive gear.

13. The conversion adapter according to any one of claims 8 to 11, characterized in that, The number of meshing operations between the first rack and the gear is the first meshing count, and the number of meshing operations between the second rack and the gear is the second meshing count. The absolute value of the difference between the first meshing count and the second meshing count is an odd number.

14. The conversion adapter according to any one of claims 8 to 12, characterized in that, The first rack and the second rack have the same number of teeth.

15. The conversion adapter according to any one of claims 4 to 12, characterized in that, The adapter further includes a guide mechanism, which includes a plurality of guide posts corresponding to each of the plug assemblies; the plug assembly also includes a base connected to the pins, the base having threaded through holes and guide through holes. The threaded through hole is adapted to the threaded transmission part, and the rotation drive component passes through the threaded through hole; The guide post is slidably inserted into the guide through hole.

16. The conversion adapter according to any one of claims 2 to 12, characterized in that, The conversion adapter further includes a positioning mechanism, which includes a positioning element and multiple positioning grooves. Wherein, one of the positioning member and the plurality of positioning grooves is disposed on the main body, and the other is disposed at intervals along the circumference of the rotating part at the bottom of the rotating part; The positioning mechanism is configured such that when any of the plug components is in the pluggable position and all of the plug components are in the retracted position, the positioning element engages with the corresponding positioning groove.

17. The conversion adapter according to any one of claims 2 to 12, characterized in that, The conversion adapter also includes: A retractable cable module, including a retractable charging cable for connecting external electronic devices; The telescopic cable module is electrically connected to the circuit board.

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