Patent Publication Number: US-2022231472-A1

Title: Plug structure and electronic device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of International Application No. PCT/CN2020/120040, filed on Oct. 9, 2020, which claims priority to Chinese Patent Application No. 201910974381.6, titled “PLUG STRUCTURE AND ELECTRONIC DEVICE”, and filed on Oct. 14, 2019, the entire disclosures of which are incorporated herein by their references. 
    
    
     FIELD 
     The present disclosure relates to the field of electrical appliances, and more particularly, to a plug structure and an electronic device. 
     BACKGROUND 
     The increase of electronic products, especially the appearance of portable products, has greatly facilitated people&#39;s lives. Accordingly, a large number of electronic products need to be equipped with a battery for power supply when they are carried around, and non-reusable batteries are undoubtedly a huge waste. Therefore, most of the existing electronic products are equipped with rechargeable batteries, and correspondingly, chargers are required. 
     SUMMARY 
     An object of the present disclosure is to provide a plug structure and an electronic device that are small in size and can be easily stored and carried around. 
     In a first aspect of the present disclosure, a plug structure is provided. The plug structure includes a plug body and a plug. The plug body has an accommodating groove configured to accommodate the plug; the plug includes a rotating shaft and a plurality of pins; the rotating shaft is slidably arranged in the accommodating groove and is rotatable to at least a first position and a second position; when the rotating shaft is rotated to the first position, the plurality of pins is accommodated in the accommodating groove; and when the rotating shaft is rotated towards a top end of the plug body from the first position to the second position, the plurality of pins protrudes out of the plug body from the accommodating groove. 
     In a second aspect of the present disclosure, an electronic device is provided. The electronic device includes a circuit module and the plug structure in the first aspect. The circuit module is electrically connected to the plurality of pins of the plug structure. 
     In the plug structure, the plurality of pins can be in a retracted state so as to be accommodated in the accommodating groove. When needed to be expanded for use, the plurality of pins can slide and rotate along a sliding groove to protrude out of the sliding groove for use. Therefore, when the plug structure is not in use, the plurality of pins is retracted to reduce a space occupied by the plurality of pins, which is convenient for carrying and storage. 
     In this case, when the plurality of pins slides to a working state, the rotating shaft is rotated from the first position to the second position, and the plurality of pins moves towards the top end of the plug body, thereby shortening a distance between the plurality of pins and an end surface of the top end of the plug body. Therefore, when the plug structure is plugged into a socket, the plug structure occupies a smaller space, such that the plug structure neither “invades” a space of an adjacent position in the socket, nor affects plugging and use of another plug structure. 
     Therefore, when an electronic device containing such a plug structure is used, the plug structure occupies a smaller space, such that the plug structure facilitates carrying and using the electronic device, and prevents the electronic device from affecting the plugging and use of another electronic device when being plugged into the socket. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view of a charger according to an embodiment of the present disclosure; 
         FIG. 2  is an exploded view of the charger illustrated in  FIG. 1 ; 
         FIG. 3  is a perspective view of the charger illustrated in  FIG. 1  in another state; 
         FIG. 4  is a perspective view of the charger illustrated in  FIG. 1  in another state; 
         FIG. 5  is a cross-sectional view of the charger illustrated in  FIG. 1 ; 
         FIG. 6  is a schematic diagram showing a structure of the charger illustrated in  FIG. 1  with pins thereof in a working state; 
         FIG. 7  is an exploded view of the charger illustrated in  FIG. 2  observed from another perspective; 
         FIG. 8  is a schematic diagram showing a structure of an upper housing illustrated in  FIG. 6 ; 
         FIG. 9  is a schematic diagram showing a structure of a lower housing illustrated in  FIG. 2 ; 
         FIG. 10  is a schematic diagram showing a structure of the charger illustrated in  FIG. 1  with pins thereof in a retracted state; 
         FIG. 11  is a schematic diagram showing a structure of the charger illustrated in  FIG. 1  with an elastic conductive sheet mounted on an upper housing thereof; 
         FIG. 12  is a cross-sectional view of the charger illustrated in  FIG. 11 ; 
         FIG. 13  is a schematic diagram showing a partial structure of the charger illustrated in  FIG. 10 ; 
         FIG. 14  is a cross-sectional view of the charger illustrated in  FIG. 13  taken along a direction A-A; 
         FIG. 15  is a cross-sectional view of the charger illustrated in  FIG. 13  taken along a direction D-D; and 
         FIG. 16  is a schematic diagram showing electronic modules of an electronic device according to an embodiment of the present disclosure. 
     
    
    
     Reference numerals of accompanying drawings are explained as follows:
           1 , charger;     10 , charging module;  11 , main board;  20 , plug structure;     21 , plug body;  210 , top end;  211 , accommodating groove;  2111 , first accommodating groove;  2112 , second accommodating groove;  2113 , third accommodating groove;  2115 , first guide groove;  2116 , second guide groove;  212 , upper housing;  2121 , via hole;  2122 , snapping groove;  213 , lower housing;  214 , sliding groove;  2141 , first end;  2142 , second end;  2143 , first limiting member;  2144 , second limiting member;  2145 , first sliding groove;  2146 , second sliding groove;  215 , boss;  216 , through groove;     22 , plug;  221 , rotating shaft;  222 , pin;  223 , end portion;     23 , connecting member;  232 , convex post;  233 , first convex rib;  234 , second convex rib;     24 , elastic conductive sheet;  241 , elastic portion;     30 , accommodating chamber;  301 , upper accommodating chamber;  302 , lower accommodating chamber;     40 , circuit module;  41 , energy storage unit;  42 , charging and discharging circuit.       

     DESCRIPTION OF EMBODIMENTS 
     Although the present disclosure can be easily embodied in different forms of embodiments, only some specific embodiments are illustrated in the accompanying drawings and described in detail in this specification. Also, it can be understood that this specification should be regarded as exemplary description of principles of the present disclosure, and is not intended to limit the present disclosure to the description made herein. 
     Therefore, a feature described in this specification is used to describe one of the features of an embodiment of the present disclosure, rather than implying that each embodiment of the present disclosure must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other unspecified combinations. Consequently, unless otherwise stated, combinations illustrated herein are not intended to be limiting. 
     Exemplary embodiments will now be described in detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms, and should not be construed as being limited to examples set forth herein. On the contrary, the exemplary embodiments are provided to facilitate thorough and comprehensive description of the present disclosure, and fully convey the concept of the exemplary embodiments to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. Same reference numerals in the figures denote same or similar parts, and thus repeated description of the same reference numerals will be omitted here. 
     In addition, described features, structures, or characteristics may be combined in one or more example embodiments in any suitable manner. In the following description, many specific details are provided to facilitate solid understanding of the exemplary embodiments of the present disclosure. However, it is conceivable for those skilled in the art that technical solutions of the present disclosure can be practiced without one or more specific details, or other methods, components, steps, etc., can be adopted. In other cases, well-known structures, methods, implementations, or operations are not illustrated or described in detail to highlight and avoid obscuring various aspects of the present disclosure. 
     Some of the block diagrams illustrated in the figures are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in a form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor apparatuses and/or microcontroller apparatuses. 
     Preferred embodiments of the present disclosure will be further described in detail below in conjunction with the accompanying drawings in the specification. 
     At present, since a plug structure of a charger has a plurality of outstretched pins, the plug structure of the charger often occupies a large space, which hinders portable storage of the charger. 
     The present disclosure proposes an electronic device including a circuit module and a plug structure. The circuit module is electrically connected to the plug structure. The circuit module and the plug structure can be integrally formed as one piece, the plug structure has an accommodating groove defined therein, and the accommodating groove is configured to accommodate the circuit module. Alternatively, the circuit module and the plug structure may be formed as separate pieces, and the circuit module can be detachably connected to the plug structure. 
     The electronic device can be a charger, a mobile power supply, or a plug adapter. Specifically, in the present disclosure, description is made by taking the electronic device being the charger and the circuit module being a charging module as an example. 
     In some embodiments, referring to  FIG. 1  and  FIG. 2 , a charger  1  includes a charging module  10  and a plug structure  20 . A plug body  21  of the plug structure  20  has an accommodating chamber  30  defined therein. The accommodating chamber  30  is configured to accommodate the charging module  10 , and the charging module  10  is electrically connected to a plug  22  of the plug structure  20 . The plug structure  20  is configured to be connected to an external power supply to provide power to the charging module  10 . The charging module  10  is electrically connected to an apparatus to be charged to charge the apparatus to be charged. 
     The charging module  10  includes a main board  11  and electronic components (not illustrated) arranged on the main board  11 . One end of the charging module  10  is electrically connected to the plug  22 , and the other end of the charging module  10  is electrically connected to the apparatus to be charged to charge the apparatus to be charged. Here, the apparatus to be charged may be an electronic device such as a smart mobile terminal, a mobile power supply, a notebook computer, a drone, an e-book, an electronic cigarette, a smart wearable device, and a sweeping robot. A charging object to which the charger is applied is not limited here. 
     In some embodiments, the plug structure  20  is a two-pole plug. That is, the two-pole plug includes two pins. It can be understood that the plug structure  20  can also be a two-pole grounding plug. The two-pole grounding plug includes three pins. 
     In some embodiments, the plug structure  20  includes the plug body  21  and the plug  22 . The plug body  21  has an accommodating groove  211  configured to accommodate the plug  22 . The plug  22  is close to a top end  210  of the plug body  21 , and the accommodating groove  211  extends towards the top end  210  of the plug body  21 . A first position and a second position are two different positions on the accommodating groove  211 . A distance between the first position and the top end  210  of the plug body  21  is different from a distance between the second position and the top end  210  of the plug body  21 . The first position may be located at an end of the accommodating groove  211 , and the second position may be located at another end of the accommodating groove  211 . It can be understood that the first position and the second position may alternatively be located in a middle region of the accommodating groove  211 . In addition, a plurality of first positions and a plurality of second positions may be provided. As long as there is a certain distance between the first position and the second position along an extending direction of the accommodating groove  211 , the first position and the second position are not limited in quantities thereof here. 
     In some embodiments, the plug body  21  may be a rectangular box body. Two short side ends of the plug body  21  are a bottom end and the top end  210  of the plug body  21 , respectively. The extending direction of the accommodating groove  211  is parallel to a direction along a long side of the plug body  21 . 
     The plug  22  includes a rotating shaft  221  and a plurality of pins  222 . The rotating shaft  221  is slidably arranged in the accommodating groove  211  and is rotatable to at least the first position and the second position. That is, the rotating shaft  221  is movable along the accommodating groove  211  towards or away from the top end  210  of the plug body  21 , between the first position and the second position. 
     Referring to  FIG. 3 , when the rotating shaft  221  is rotated to the first position, the plurality of pins  222  is accommodated in the accommodating groove  211 , the rotating shaft  221  abuts against a bottom of the accommodating groove  211 , and the plug  22  of the plug structure  20  is in a retracted state. Referring to  FIG. 4 , when the rotating shaft  221  is rotated towards the top end  210  of the plug body  21  from the first position to the second position, the rotating shaft  221  moves towards the top end  210  of the plug body  21 , the rotating shaft  221  slides to a position having a first distance from an end surface of the top end  210  of the plug body, and the plurality of pins  222  protrudes out of the accommodating groove  211  and is perpendicular to the plug body  21 . In this way, the plug structure  20  can be plugged into an external socket to operate in the working state. 
     The plug  22  can be in a retracted state in which the plug  22  is retracted in the accommodating groove  211 . In this way, when the plug structure  20  is not in use, the plug  22  can be retracted to reduce a space occupied by the plug  22 , which is convenient for carrying and storage. 
     Referring to  FIG. 5  and  FIG. 6 , when there is a need for the plug structure  20  to expand the plug  22  for use, the plug  22  can slide along the accommodating groove  211  towards the top end  210  of the plug body  21  to the second position. The plurality of pins  222  protrudes out of the accommodating groove  211  and is perpendicular to the plug body  21 , such that the plug can be plugged into an external socket to enable the plug structure  20  to operate in the working state. Since the second position is a position to which the rotating shaft  221  slides and which has a first distance A from the end surface of the top end  210  of the plug body, the second position is closer to the end surface of the top end  210  of the plug body  21  than the first position. When the rotating shaft  221  slides to the position having the first distance A from the end surface of the top end  210  of the plug body, the plurality of pins  222  can be close to the end surface of the top end  210  of the plug body  21 , such that a distance between each of the plurality of pins  222  and the end surface of the top end  210  of the plug body is shortened. 
     In a conventional plug, when a pin is in a working state, a distance between an edge of the plug body and the pin is usually at least 15.8 mm, which is a relatively great value and occupies a relatively large space. When the conventional plug structure is plugged into a socket, the plug structure may occupy a relatively large space since the edge of the plug body occupies a large area. In this case, a socket body “invades” a jack of the socket in an adjacent position, which affects the use of the adjacent position in the socket, and leads to an occurrence of an “overlord plug” phenomenon. 
     Referring to  FIG. 4 , the plug  22  in the plug structure  20  is in the working state. In this case, the plug  22  in the second position is closer to the end surface of the top end  210  of an end of the plug body  21  than the plug  22  in the first position, and a distance between the pins  222  and the end surface of the top end  210  of the end of the plug body  21  is shortened. Therefore, the distance between the pins  222  of the plug structure  20  in the working state and the end surface of the top end  210  of the plug body  21  is shortened, thereby reducing a space occupied by the edge of the plug structure  20 . When the plug structure  20  is plugged into the socket, the plug structure  20  neither “invades” a space of the adjacent position in the socket, nor affects plugging and use of another plug structure. 
     In some embodiments, when the plurality of pins  222  is in the second position, the first distance A between the rotating shaft  221  and a bottom of the accommodating groove  211  is 6.5 mm. Therefore, in the extending direction of the accommodating groove  211 , the distance between the pin  222  and the end surface of the top end of the plug body  21  can reach 6.5 mm. The distance between the end surface of the top end  210  of the plug structure  20  and the plurality of pins  222  needs to be at least 6.5 mm to prevent fingers from contacting a plug insert and getting an electric shock and satisfy safety codes and standards of the plug structure  20 . 
     In addition, a minimum distance between the end surface of the top end  210  of the plug body  21  and the pins  222  can be 6.5 mm to minimize a space occupied by an outer edge of the plug body  21 , thereby avoiding the occurrence of the “overlord plug” phenomenon to the greatest extent under the premise of ensuring the safe use of the plug structure. 
     In some embodiments, referring to  FIG. 2 , the plug body  21  includes an upper housing  212  and a lower housing  213  that fit with and are connected to each other, and the upper housing  212  and the lower housing  213  together define the accommodating groove  211 . The upper housing  212  and the lower housing  213  may be fixedly connected to each other by means of snapping, screwing, or hot melting. In other embodiments, the plug body  21  is not limited to being divided into two structural portions, i.e., an upper portion and a lower portion, and may alternatively be of another form of structural composition. The structural composition of the plug body  21  is not limited here. 
     Referring to  FIG. 7 , the upper housing  212  has an upper accommodating chamber  301  defined therein. The main board  11  is fixed in the upper accommodating chamber  301 . In addition, a shape of the upper accommodating chamber  301  matches a shape of the main board  11 . The main board  11  is snapped into and fixed in the upper accommodating chamber  301  of the upper housing  212 . 
     Referring to  FIG. 8 , the upper housing  212  has via holes  2121  defined thereon, and the via holes  2121  are configured for the pins  222  to be rotated out of the accommodating groove  211 . The via holes  2121  are in communication with the accommodating groove  211 , and the pins  222  are rotatable from a side of the upper housing  212  to an outer side of the plug body  21 . 
     Referring to  FIG. 9 , the lower housing  213  has a lower accommodating chamber  302 . The lower accommodating chamber  302  corresponds to electronic components arranged on the main board  11 . In addition, a shape of the lower accommodating chamber  302  matches the shape of the upper accommodating chamber  301 . The upper housing  212  and the lower housing  213  may be injection-molded plastic members. In addition, the upper housing  212  and the lower housing  213  are formed as an integrative structure. The upper housing  212  and the lower housing  213  may be fabricated at a high precision to facilitate molding. 
     The accommodating groove  211  includes a first accommodating groove  2111  configured to accommodate the rotating shaft  221  and a second accommodating groove  2112  and a third accommodating groove  2113  that are configured to accommodate two pins  222 , respectively. The two pins  222  are located on two sides of the rotating shaft  221 , respectively, and the second accommodating groove  2112  and the third accommodating groove  2113  are located on two sides of the first accommodating groove  2111 , respectively. The rotating shaft  221  moves along the first accommodating groove  2111 , and the two pins  222  move along the second accommodating groove  2112  and the third accommodating groove  2113 , respectively. 
     In some embodiments, the first accommodating groove  2111  is arc-shaped, and the rotating shaft  221  is rotatable along the first accommodating groove  2111  to the second position. Correspondingly, the second accommodating groove  2112  and the third accommodating groove  2113  are also arc-shaped. When the rotating shaft  221  moves along the first accommodating groove  2111 , the two pins  222  also follows to move along the second accommodating groove  2112  and the third accommodating groove  2113 . Groove opening widths of the second accommodating groove  2112  and the third accommodating groove  2113  match widths of the two pins  222  to enable the two pins  222  to be stably accommodated in the second accommodating groove  2112  and the third accommodating groove  2113  in a one-to-one correspondence. 
     In some embodiments, the first accommodating groove  2111  includes an arc groove  214 . The arc groove  214  is arranged on the lower housing  213 . The upper housing  212  has a boss  215  matching a shape of the arc groove  214 . A channel configured for sliding of the plug  22  is defined between a top surface of the boss  215  of the upper housing  212  and a bottom surface of the arc groove  214 . It can be understood that the channel can alternatively be directly defined in the upper housing  212  or the lower housing  213 . 
     The rotating shaft  221  is rotatable to the second position along the arc groove  214 . The bottom surface of the arc groove  214  is shaped as an arc concave surface, and the boss  215  has an arc convex surface. The arc concave surface and the arc convex surface match each other, and form an arc channel. The rotating shaft  221  is slidable along the arc channel. 
     In some embodiments, a first position  2141  and a second position  2142  correspond to two ends of the arc groove  214 , respectively. When the rotating shaft  221  moves along the arc groove  214 , by virtue of the shape of the arc groove  214 , the rotating shaft  221  can be rotated easily to exert a pushing force to enable the pins  222  to slide and rotate along the arc groove  214 . The first position  2141  and the second position  2142  are located at the two ends of the arc groove  214 , respectively, and a length of the arc groove  214  can be minimized, thereby reducing a volume of the plug body  21 . 
     It can be understood that, in other embodiments, the first position and the second position may alternatively be located in a middle portion of the arc groove  214 , and the arc concave surface may also be located in a middle segment region of the arc groove  214 . 
     For convenience of description, one end of the arc groove  214  is correspondingly the first position  2141 , and the other end of the arc groove  214  is correspondingly the second position  2142 . The second position  2142  is close to the end surface of the top end  210  of an end of the lower housing  213 . Here, when the rotating shaft  221  is located at the first position  2141  of the arc groove  214 , the plug  22  is in the retracted state. When the rotating shaft  221  slides to the second position  2142  along the arc groove  214 , the plug  22  is rotated relative to the arc groove  214 , the top end  210  of the plug  22  is rotated out of the accommodating groove  211  from the via holes  2121  to enable the pins  222  to be rotated to the working state and the rotating shaft  221  to be located at the second position  2142 . When the pins  222  are in the working state, the pins  222  are perpendicular to a surface of the plug body  21 , thereby ensuring that the pins  222  can be stably plugged into the jacks of the socket. 
     In some embodiments, with continued reference to  FIG. 2  and  FIG. 7 , each pin  222  has a connecting member  23  provided at a bottom thereof. The rotating shaft  221  is connected to the two pin  222  through the connecting member  23 , such that the rotating shaft  221  can drive the two pins  222  to move together. 
     The connecting member  23  may be injection-molded from materials such as plastic and rubber. The connecting member  23  at least partially wraps the bottom of the pin  222 , and can provide insulation protection to the bottom of the pin  222 . In addition, the connecting member  23  can be slidably arranged on the arc groove  214 . The connecting member  23  wraps the bottom of the pin  222 , and the pin  222  is not in direct contact with the arc groove  214 . Both the connecting member  23  and the lower housing  213  are injection-molded plastic members, and thus a small frictional resistance is present between the connecting member  23  and the arc groove  214 , thereby facilitating sliding and rotation of the pin  222 . 
     In addition, the connecting member  23  has a bottom that is arc-shaped. The arc-shaped bottom of the connecting member  23  can reduce a contact area between the connecting member  23  and the arc groove  214 , and ensure that the connecting member  23  can also slide and rotate smoothly along the arc groove  214 . 
     Since at least two pins  222  are provided, the rotating shaft  221  is connected to two pins  222 . By connecting the two pins  222  with the rotating shaft  221  located between the two pins  222  and enabling the two pins  222  to slide along the arc groove  214 , the two pins  222  can maintain a consistent moving trajectory, such that the two pins  222  can move synchronously. The rotating shaft  221  has an arc-shaped side surface that can reduce a contact area between the rotating shaft  221  and the arc groove  214 , thereby ensuring that the pins  222  can smoothly slide and rotate along the arc groove  214 . 
     Referring to  FIG. 5 , in some embodiments, a cross section of the rotating shaft  221  is ellipse-shaped. When the rotating shaft  221  slides and rotates along the arc groove  214 , a long-axis direction of the ellipse is parallel to an extending direction of the arc groove  214 . In conjunction with  FIG. 7 , when the rotating shaft  221  moves to the second position  2142  of the arc groove  214 , the rotating shaft  221  is rotated to enable that an outer surface of the rotating shaft  221  and an inner side wall of the arc groove  214  can abut against each other to fix and support the rotating shaft  221 , ensure that the pins  222  can be stably limited to the second position  2142  of the arc groove  214 , and guarantee that the pins  222  can be in a stable working state for normal use. 
     Referring to  FIG. 9 , the accommodating groove  211  has a limiting member provided at a bottom thereof. When the rotating shaft is rotated to the first position  2141  or the second position  2142 , the rotating shaft  221  is connected to the limiting member in a position limiting manner. 
     In some embodiments, the arc groove  214  has a first limiting member  2143  arranged at a position close to the first position. The first limiting member  2143  is arranged at a position in the accommodating groove  211  close to the first position. When the pins are retracted in the accommodating groove, the rotating shaft  221  abuts against the first limiting member  2143  in a position limiting manner. The first limiting member  2143  has a guiding surface. The guiding surface of the first limiting member  2143  can facilitate smooth sliding of the pins  222  from the first position  2141  to the second position  2142  via the first limiting member  2143 . 
     The limiting member includes a second limiting member  2144 . The second limiting member  2144  is arranged at a position in the accommodating groove  211  close to the second position  2142 . Specifically, the arc groove  214  has the second limiting member  2144  arranged at the position close to the second position  2142 . When the rotating shaft  221  is rotated to the second position  2142 , the rotating shaft  221  abuts against the second limiting member  2144  in a position limiting manner. 
     The second limiting member  2144  also has a guiding surface. The guiding surface of the second limiting member  2144  has a smooth transition along a direction from the first position  2141  to the second position  2142 , thereby facilitating the sliding of the rotating shaft  221  along the arc groove  214 , and enabling the rotating shaft  221  to smoothly slide to the second position  2142  of the arc groove  214 , thereby maintaining the working state of the pin  222 . 
     In addition, the first limiting member  2143  and the second limiting member  2144  are elongated and extend along a direction parallel to an axial direction of the rotating shaft  221 . Therefore, each of the first limiting member  2143  and the second limiting member  2144  can have a large contact area with the rotating shaft  221 , thereby ensuring that the first limiting member  2143  and the second limiting member  2144  can maintain stable contact with the rotating shaft  221  in a position limiting manner. 
     The first limiting member  2143  and the second limiting member  2144  are staggered, and the first limiting member  2143  and the second limiting member  2144  are located on two opposite sides of the bottom surface of the arc groove  214 , respectively. 
     Correspondingly, referring to  FIG. 7  again, the rotating shaft  221  has a convex rib provided thereon. The convex rib is configured to cooperate with and abut against the limiting member in a position limiting manner. The convex rib includes a first convex rib  233  and a second convex rib  234 . The first convex rib  233  and the second convex rib  234  are staggered, such that the first convex rib  233  may abut against the first limiting member  2143  and the second convex rib  234  may abut against the second limiting member  2144 . 
     Referring to  FIG. 10 , when the pins  222  are in the retracted state, the first convex rib  233  of the rotating shaft  221  and the first limiting member  2143  on the arc groove  214  abut against each other, such that positions of the pins  222  are limited to the retracted state. When the rotating shaft  221  slides and rotates along the arc groove  214  and moves to the second position  2142  of the arc groove  214 , the second convex rib  234  of the rotating shaft  221  cooperates with and abuts against the second limiting member  2144  on the arc groove  214 , such that positions of the pins  222  are limited to the working state, as illustrated in  FIG. 11 . 
     In addition, the pins  222  in the retracted state are perpendicular to the pins  222  in the working state. Therefore, the first convex rib  233  and the second convex rib  234  on the rotating shaft  221  correspond to a central angle of 90 degrees of the rotating shaft  221  to ensure that the rotating shaft  221  can be rotated by 90 degrees, and the pins  222  can be rotated from the retracted state to the working state, where the pins in the working state are perpendicular to the pins in the retracted state. 
     With reference to  FIG. 2  again, in some embodiments, the accommodating groove  211  has through grooves  216  defined in an end thereof facing away from the first position  2141 . The through grooves  216  are in communication with an outer side of the plug body  21 . When the rotating shaft  221  is located in the first position  2141 , each of the pins  222  is partially accommodated in the through groove  216 . Specifically, the through grooves  216  are arranged at the second position  2142  of the arc groove  214 . Each through groove  216  extends along the extending direction of the arc groove  214 . The arc groove  214  is in communication with the outer side of the plug body  21  via the through grooves  216 , and the through grooves  216  are configured to accommodate the plug  22 . 
     In addition, in some embodiments, the through grooves  216  may be defined by the upper housing  212  and the lower housing  213  together. Both the upper housing  212  and the lower housing  213  have the through grooves  216  defined thereon. 
     A groove opening width of the through groove  216  is smaller than a groove opening width of the via hole  2121 . The through groove  216  only needs to partially accommodate the pin  22 . The groove opening width of the through groove  216  is smaller than that the groove opening width of the accommodating groove  211  to improve structural compactness of the plug structure  20 . 
     In some embodiments, a length of the accommodating groove  211  is smaller than a length of each pin  222 , and an end portion  223  of the pin  222  protrudes out of the through groove  216 . When the pin  222  is in the retracted state, i.e., when the rotating shaft  221  is in the first position, the end portion  223  of the pin  222  is located outside the plug body  21 , which is convenient for manually holding the pin  222  and rotating the pin  222  with a force. 
     In addition, the plug body  21  has the through grooves  216  defined to further achieve a short length of the accommodating groove  211  of the plug body  21 . The pin  222  can be accommodated in the accommodating groove  211  of the short length, such that the pin  222  can be in the retracted state. In this way, it is avoided that to accommodate the pin  222 , the plug structure  20  has the accommodating groove  211  of a large length defined therein, and the accommodating groove  211  of the large length causes the plug structure  20  to occupy a large area. 
     When the rotating shaft  221  moves in the arc groove  214 , the pins  222  can slide relative to and along the arc groove  214  in the extending direction of the arc groove  214 , can also be rotated relative to the arc groove  214 . In addition, an order of the sliding and the rotation of the pin  222  relative to the arc groove  214  is not limited, and the pins  222  can slide before being rotated, or be rotated before sliding. In some embodiments, simultaneous to the relative movement of the pins  222  in the arc-shaped arc groove  214 , the pins are rotated. 
     With reference to  FIG. 9  again, in some embodiments, two side walls of the accommodating groove  211  further have a first guide groove  2115  and a second guide groove  2116 . The first guide groove  2115  and the second guide groove  2116  are respectively located on two sides of the accommodating groove  211 . Each pin  222  has a convex post  232  protruding from an outer side thereof. The convex post  232  is electrically connected to the pin  222 . The convex posts  232  can be slidably arranged in the first guide groove  2115  and the second guide groove  2116 . The convex posts  232  slide along the first guide groove  2115  and the second guide groove  2116 , which helps the rotating shaft  221  to slide and rotate stably. 
     The convex posts  232  and the rotating shaft  221  are located on a same axis. Therefore, shapes of the first guide groove  2115  and the second guide groove  2116  are the same. Here, heights of the first guide groove  2115  and the second guide groove  2116  match heights of the convex posts  232 , such that the convex posts  232  can slide and rotate along the first guide groove  2115  and the second guide groove  2116 . 
     In addition, the convex post  232  is a conductor. The convex post  232  is electrically connected to the pin  222 . The convex post  232  may be a metallic convex post. The convex post  232  is electrically connected to the bottom of the pin  222  in the interior of the connecting member  23 . 
     The plug structure  20  includes elastic conductive sheets  24  that are arranged in the accommodating groove  211 . Each elastic conductive sheet  24  is arranged on an inner side of the accommodating groove  211  and faces towards one of the pins  222 . An end of the elastic conductive member  24  is electrically connected to the pin  222 , and another end of the elastic conductive sheet  24  is electrically connected to the charging module  10  via a wire. 
     Referring to  FIG. 11  and  FIG. 12 , specifically, the elastic conductive sheets  24  are mounted on the upper housing  212 . The upper housing  212  has snapping grooves  2122 . The two ends of the elastic conductive sheet  24  are snapped into and fixed in the snapping groove  2122 . The elastic conductive member  24  is electrically connected to the main board  11  via a wire. In some embodiments, the upper housing  212  has the snapping grooves  2122  provided on two sides of the boss  215 . 
     Each elastic conductive sheet  24  has an elastic portion  241 . A shape of the snapping groove  2122  matches the elastic conductive member  24 , such that the elastic portion  241  can be snapped into the snapping groove  2122  to limit a position of the elastic conductive sheet  24 . 
     Referring to  FIG. 13 , two elastic conductive sheets  24  are provided, which are provided on two opposite sides of the plurality of pins  222  in an axial direction of the rotating shaft  231 , respectively. The convex posts  232  protrude outwards relative to the two opposite sides of the plurality of pins  222 , such that the convex posts  232  are in contact with the elastic conductive sheets  24  in one-to-one correspondence to realize electrical connection. 
     Referring to  FIG. 14  and  FIG. 15 , when the pins  222  are rotated to the working state, the elastic portions  241  are squeezed by the convex posts  232  and deform elastically to generate an elastic resilience force. Specifically, the elastic conductive sheets  24  are formed by bending a metallic sheet, and the elastic portions  241  have elasticity after the bending. 
     When the upper housing  212  and the lower housing  213  are bonded to other, the boss  215  of the upper housing  212  faces the arc groove  214  of the lower housing  213 , and the elastic conductive sheets  24  face the outer sides of the pins  222 . Referring to  FIG. 8  and  FIG. 9 , when the elastic portions  241  correspond to the second position  2142  of the sliding groove, the convex posts  232  protrude from the outer side of the plurality of pins  222 . When the plurality of pins  222  is located at the second position  2142 , the convex posts  232  abut against the elastic portions  241  of the elastic conductive sheets  24  in such a manner that the elastic conductive sheets  24  deform and then the elastic conductive sheets  24  are electrically connected to the plurality of pins  222 . 
     In the plug structure  20 , the plurality of pins  222  can be accommodated in the accommodating groove  211  when in the retracted state. When the pins  222  need to be stretched for use, the pins  222  can slide and rotate along the accommodating groove  211  to be stretched out for use. Therefore, when the plug structure  20  is not in use, the pins  222  are retracted to reduce the space occupied by the pins  222  and facilitate carrying and storage of the plug structure  20 . 
     When the pins  222  slide to the working state, the position of the pins  222  moves towards an edge of the plug body  21  to shorten a distance between the pins  222  and the edge of the plug body  21 . Therefore, when the plug structure  20  is plugged into the socket, the plug structure  20  occupies a small space and does not “invade” the space of an adjacent position in the socket. 
     In other embodiments, the plug may be the two-pole grounding plug, and thus the plug structure includes three pins. The three pins can be one grounding pin and two electrode pins. The two electrode pins can have one rotating shaft arranged therebetween, and the accommodating groove of the plug body can have the sliding groove defined therein, such that the rotating shaft can slide and rotate along the sliding groove to drive the two electrode pins to move. 
     The grounding pin can be rotatably arranged on the plug body. When the two electrode pins are in the retracted state, the grounding pin is also in the retracted state, and can be accommodated between the two electrode pins. When the two electrode pins are in the working state, the grounding pin is also in the working state, such that the two-pole grounding plug can be plugged normally for use. 
     Therefore, the two-pole grounding plug can also reduce an occupied volume and facilitate storage and carrying. Also, a distance between an edge of the two-electrode grounding plug and each pin is also short, such that the two-pole grounding plug does not invade space of an adjacent position in the socket to affect normal use of another plug, thereby avoiding the occurrence of the “overlord plug” phenomenon. 
     Referring to  FIG. 16 , in other embodiments, the electronic device may alternatively be a mobile power supply. The circuit module  40  further includes an energy storage unit  41  configured to store electric energy and a charging and discharging circuit  42 . The energy storage unit  41  is electrically connected to the charging and discharging circuit  42 . The charging and discharging circuit  42  can be configured to charge the energy storage unit  41 , and the energy storage unit  41  can supply power to an external power consumption apparatus through the charging and discharging circuit  42 . 
     In other embodiments, the circuit module may alternatively be other power supply circuits. The power supply circuit is electrically connected to the pins of the plug structure to establish a connection with an external power source through the plug structure, and supply power to a power consumption apparatus through the power supply circuit. The power supply circuit may be, e.g., a transformer conversion circuit. The electronic device can be an adapter, a power adapter, or the like. 
     In addition, in other embodiments, the circuit module detachably connected to the plug structure. The circuit module can be an independent structure relative to the plug structure, and the circuit module and the plug structure can be electrically connected to each other by a plugging wire. For example, when the circuit module is a power bank, the plug structure may be a charging plug. The power bank can be independent of the plug structure to facilitate carrying. 
     Although the present disclosure has been described with reference to several typical embodiments, it should be understood that terms used in the present disclosure are illustrative and exemplary, rather than restrictive. Since the present disclosure can be implemented in various forms without departing from the spirit or essence of the present disclosure, it should be understood that the above embodiments, instead of being construed as being limited to any of the details described above, should be interpreted broadly within the spirit and scope defined by the claims as attached. Therefore, all changes and modifications falling within the scope of the claims or their equivalents shall be encompassed by the claims as attached.