Charger

Abstract

The utility model provides a charger. The charger comprises a housing, a first pin, a second pin and a gear assembly. The first pin is rotationally connected with the shell, the second pin is rotationally connected with the shell, and the second pin and the first pin are arranged at intervals in the first direction. The gear assembly is located between the first plug pin and the second plug pin in the first direction and engaged with the first plug pin and the second plug pin, the first plug pin can rotate in the circumferential direction after obtaining the driving force, and the gear assembly can drive the second plug pin to reversely rotate in the circumferential direction. According to the scheme, the gear assembly can be arranged in the direction perpendicular to the first direction, arrangement of the gear assembly in a limited space is facilitated, and the space utilization rate is further increased. Therefore, the charger provided by the utility model simplifies the transmission structure while meeting the folding requirement, and is higher in space utilization.

Description

TECHNICAL FIELD

[0001] The utility model relates to a charger technical field, especially a kind of charger. BACKGROUND

[0002] Power plug refers to the device that electric appliance is connected to power supply device.Electrical outlet and plug are different in shape, grade, size and type according to the different countries and regions.Especially British plug is usually fixed structure, not only occupies desktop space, but also is easily damaged in carrying process.In related technology, the plug structure that multiple pins can be folded or unfolded simultaneously is more complex, inconvenient to use, and poor in space utilization. UTILITY MODEL CONTENT

[0003] The main purpose of the utility model is to provide a charger, which satisfies the folding requirement, simplifies the transmission structure, and has higher space utilization.

[0004] To achieve the above object, the utility model embodiment adopts the following technical scheme:

[0005] The charger comprises:

[0006] A shell;

[0007] A first pin is rotatably connected to the shell;

[0008] A second pin is rotatably connected to the shell, and the second pin is arranged along a first direction and spaced apart from the first pin;

[0009] A gear assembly is located between the first pin and the second pin along the first direction, and meshes with the first pin and the second pin, respectively;

[0010] The first pin can rotate along the circumferential direction after obtaining driving force, and the gear assembly can drive the second pin to rotate in the opposite direction along the circumferential direction.

[0011] In some embodiments, the gear assembly comprises a plurality of gears, each gear is arranged along a second direction perpendicular to the first direction and meshes with each other, one side of the shell along a third direction is a plug-in side, the third direction is perpendicular to the first direction and the second direction, the plug-in side is used for cooperating with the socket, and the first pin and the second pin can be rotated to protrude from the plug-in side.

[0012] In some embodiments, along the direction of the rotation axis of the first pin pointing to the rotation axis of the second pin, the connecting line of the rotation centers of each gear gradually extends towards the side close to the plug-in side.

[0013] In some embodiments, the shell comprises a gear base, the plurality of gears comprise a first gear, a second gear, a third gear and a fourth gear respectively rotatably connected to the gear base, the first gear is fixedly connected to the first pin, the second gear is fixedly connected to the second pin, and the third gear and the fourth gear are located between the first gear and the second gear.

[0014] In some embodiments, the first gear, the second gear, the third gear and the fourth gear each comprise a gear shaft, and the gear base has a plurality of gear grooves, each gear shaft is supported in one-to-one correspondence in each gear groove.

[0015] In some embodiments, the first gear, the second gear, the third gear and the fourth gear each comprise a gear shaft, and the gear base has a plurality of gear grooves, each gear shaft is supported in one-to-one correspondence in each gear groove.

[0016] In some embodiments, the charger further comprises a spring and a circuit board, the spring comprises a first end and a second end, the first end is electrically connected to the second pin, and the second end is electrically connected to the circuit board, the first end is configured to deform and abut the second pin during rotation of the second pin.

[0017] In some embodiments, the shell has a plug-in side along a third direction perpendicular to the first direction, the plug-in side is used to cooperate with the socket, the first pin and the second pin can rotate to protrude from the plug-in side, the first end has a plurality of grooves, and the second pin comprises a connecting end and a protrusion, the connecting end is used to electrically connect the socket, and in a direction along the connecting end pointing to an axis of rotation of the second pin, the first end gradually extends towards one side close to the plug-in side, so that the protrusion can extend into any one of the grooves during rotation of the second pin.

[0018] In some embodiments, the charger further comprises a third pin, the third pin has the same structure as the second pin, the second pin and the third pin are symmetrically distributed on both sides of the first pin, the third pin is rotatably connected to the shell, the gear assembly comprises a first gear set and a second gear set, the first gear set is located between the first pin and the second pin along the first direction and meshes with the first pin and the second pin respectively, and the second gear set is located between the first pin and the third pin along the first direction and meshes with the first pin and the third pin respectively.

[0019] In some embodiments, the shell has a plug-in side along a third direction perpendicular to the first direction, the plug-in side is used to cooperate with the socket, after the first pin, the second pin and the third pin are rotated to protrude from the plug-in side, in the first direction, the size of the first pin is smaller than the size of the second pin and the third pin, and in a second direction perpendicular to the first direction and the third direction, the size of the first pin is larger than the size of the second pin and the third pin.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] The charger of the utility model includes a shell, a first prong, a second prong and a gear assembly. Among them, the first prong and the second prong can be respectively used as two prongs of the charger, and the gear assembly is set according to the folding requirement of the charger, the gear assembly is located between the first prong and the second prong along the first direction, and is engaged with the first prong and the second prong respectively, the first prong can rotate along the circumference after obtaining the driving force, and the gear assembly can drive the second prong to rotate reversely along the circumference. Through the above setting, on the one hand, the gap of the first prong and the second prong along the first direction can be fully utilized, the setting of the gear assembly does not additionally occupy the internal space of the charger, so that the space utilization is higher, on the other hand, since the first prong and the second prong rotate in opposite directions, compared with the design that the two prongs rotate in the same direction and the transmission member is arranged along the first direction, the scheme of the utility model can arrange the gear assembly along the direction perpendicular to the first direction, which is more conducive to arranging the gear assembly in the limited space, and further increases the space utilization. Therefore, the charger of the utility model meets the folding requirement, simplifies the transmission structure, and has higher space utilization. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structure shown in these drawings without creative labor for those skilled in the art.

[0023] Figure 1 It is a perspective view of the charger provided in an embodiment of the utility model;

[0024] Figure 2 It is a perspective view of the charger provided in an embodiment of the utility model; Among them, part of the shell is removed;

[0025] Figure 3 It is a perspective view of the charger provided in an embodiment of the utility model; Among them, the prong is in the unfolded state, and part of the shell is removed;

[0026] Figure 4 It is a top view of the charger provided in an embodiment of the utility model; Among them, part of the shell is removed;

[0027] Figure 5 It is Figure 4 the section view at A-A in Fig. 1;

[0028] Figure 6 It is Figure 4 the section view at B-B in Fig. 1;

[0029] Figure 7 A three-dimensional schematic view of the elastic sheet provided in an embodiment of the present application is shown in the figure.

[0030] Figure 8 A partial three-dimensional schematic view of the shell provided in an embodiment of the present application is shown in the figure.

[0031] Explanation of reference numerals:

[0032] Charger 100;

[0033] Shell 110; plug-in side 111; gear base 112; gear groove 1121; accommodating cavity 113; first opening 114; second opening 115; third opening 116;

[0034] First pin 120;

[0035] Second pin 130; connecting end 131; protrusion 132;

[0036] Gear assembly 140; first gear set 140A; second gear set 140B; first gear 141; second gear 142; third gear 143; fourth gear 144; gear shaft 145;

[0037] Elastic sheet 150; first end 151; groove 1511; second end 152;

[0038] Third pin 160;

[0039] Circuit board 170;

[0040] First direction X;

[0041] Second direction Y;

[0042] Third direction Z;

[0043] Circumferential direction R.

[0044] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back), the directionality indication is only used to explain the relative position relationship, movement condition and the like between components in a certain posture, if the certain posture changes, then the directionality indication also changes accordingly.

[0047] In addition, if the embodiments of the utility model have the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, if "and / or", "and / or" or "and / or" appears in the whole text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0048] In the related art, the charger structure capable of simultaneously folding or unfolding multiple pins is relatively complex, inconvenient to use, and has poor space utilization.

[0049] Specifically, the applicant previously considered that a gear can be used to drive the pin folding or unfolding, in addition, corresponding to the distribution direction of each pin, a plurality of gears can be arranged in parallel and meshed with each other to connect each pin of the charger, so that each pin can move simultaneously, but the above arrangement is easy to occupy a large amount of internal space of the charger, which is not conducive to the compact design of the charger.

[0050] In view of this, referring to Figures 1-8 The embodiments of the utility model provide a charger 100. In the scheme of the application, the charger 100 itself has a plug structure, and the plug structure has a pin, so as to realize the electrical connection between the charger 100 and the socket by the pin, so as to make the charger 100 supply power to the electronic equipment. The charger 100 comprises a shell 110, a first pin 120, a second pin 130 and a gear assembly 140.

[0051] Specifically, referring to Figure 1 The shell 110 is the shell structure of the charger 100, and other parts of the charger 100 can be connected to the shell 110. According to the requirement, the shell 110 can be any suitable structure shape.

[0052] Referring to Figures 2-3The first prong 120 is rotatably connected to the housing 110, and similarly, the second prong 130 is rotatably connected to the housing 110. In the scheme of the present application, the first direction X is a direction from the geometric center of the second prong 130 to the geometric center of the first prong 120. The second prong 130 is arranged apart from the first prong 120 along the first direction X, whereby the first prong 120 and the second prong 130 can each serve as a prong structure of the charger 100, and the first prong 120 and the second prong 130 can be identical in structure or different in structure, and the first prong 120 and / or the second prong 130 can be adapted to electrically connect with a socket or can only serve to position or unlock a safety door of a socket after the charger 100 is mated with the socket. According to requirements, the charger 100 can be a two-prong charger 100, a three-prong charger 100 (in which case the charger 100 further has another prong), or any other suitable structure shape and specification standard charger 100.

[0053] Referring to Figures 2-3 The gear assembly 140 is arranged between the first prong 120 and the second prong 130 along the first direction X and engages the first prong 120 and the second prong 130 respectively. In this way, the gear assembly 140 can serve as a transmission to enable the first prong 120 to rotate along the circumferential direction R after obtaining driving force and enable the second prong 130 to rotate in the opposite direction along the circumferential direction R. It should be noted that the driving force obtained by the first prong 120 can be directly provided by a user (for example, the user manually rotates the first prong 120) or provided by other driving devices. Through the above arrangement, on the one hand, the gap between the first prong 120 and the second prong 130 along the first direction X can be fully utilized. Since the gap needs to be designed according to the specification standard of the charger 100, arranging the gear assembly 140 in the gap does not additionally occupy the internal space of the charger 100, so that the space utilization is higher. On the other hand, since the first prong 120 and the second prong 130 rotate in opposite directions, compared with the design in which two prongs rotate in the same direction and a transmission member is arranged along the first direction X, the scheme of the present application can enable the gear assembly 140 to be arranged along a direction perpendicular to the first direction X, which is more conducive to arranging the gear assembly 140 in a limited space, further increasing the space utilization.

[0054] It can be seen that the charger 100 of the utility model includes a shell 110, a first pin 120, a second pin 130 and a gear assembly 140. Among them, the first pin 120 and the second pin 130 can be respectively used as two pins of the charger 100, and the gear assembly 140 is set according to the folding requirement of the charger 100, the gear assembly 140 is located between the first pin 120 and the second pin 130 along the first direction X, and is engaged with the first pin 120 and the second pin 130 respectively, the first pin 120 can rotate along the circumferential direction R after obtaining the driving force, and the gear assembly 140 can drive the second pin 130 to rotate in the opposite direction of the circumferential direction R. Through the above setting, on the one hand, the gap between the first pin 120 and the second pin 130 along the first direction X can be fully utilized, the setting of the gear assembly 140 does not additionally occupy the internal space of the charger 100, so that the space utilization is higher, on the other hand, since the first pin 120 and the second pin 130 rotate in opposite directions, compared with the design that the two pins rotate in the same direction and the transmission member is arranged along the first direction X, the scheme of the utility model can arrange the gear assembly 140 along the direction perpendicular to the first direction X, which is more conducive to arranging the gear assembly 140 in the limited space, and further increases the space utilization. Therefore, the charger 100 of the utility model meets the folding requirement, simplifies the transmission structure, and has higher space utilization.

[0055] Referring to Figure 2 In some embodiments, the gear assembly 140 includes a plurality of gears, each gear is arranged along a second direction Y perpendicular to the first direction X and engaged with each other, and the above-mentioned direction corresponds to the long side direction of the gap between the first pin 120 and the second pin 130, so that it is more convenient to arrange a plurality of gears. In some embodiments, one side of the shell 110 along a third direction Z is a plug-in side 111, the third direction Z is perpendicular to the first direction X and the second direction Y, the plug-in side 111 is used for cooperating with the socket, and the first pin 120 and the second pin 130 can be rotated to protrude from the plug-in side 111. It can be understood that the plug-in side 111 is a side of the charger 100 used for extending into the socket, when the first pin 120 and the second pin 130 both protrude relative to the plug-in side 111, the charger 100 can be normally used, when the first pin 120 and the second pin 130 both retract relative to the plug-in side 111 (that is, the first pin 120 and the second pin 130 do not protrude from the plug-in side 111 or the protruding size is smaller), the charger 100 can be in a folded state, so as to be conveniently stored.

[0056] Referring to Figure 5In some embodiments, the connecting line of the rotation centers of the gears gradually extends towards the side close to the plugging side 111 in the direction from the rotation axis of the first pin 120 to the rotation axis of the second pin 130. It can be understood that the above arrangement makes the gears arranged obliquely when viewed in the first direction X, and in particular, when the size of the first pin 120 is large and the size of the second pin 130 is small, the rotation axis of the first pin 120 can be located on the side of the rotation axis of the second pin 130 away from the plugging side 111, and at this time, the gears are arranged obliquely when viewed in the first direction X, which can adapt to the height difference and the linear distance between the two pins, so that the gear assembly 140 is more convenient to arrange according to the structure of the first pin 120 and the second pin 130. According to requirements, in other embodiments, the connecting line of the rotation centers of the gears gradually extends away from the plugging side 111 in the direction from the rotation axis of the first pin 120 to the rotation axis of the second pin 130 when viewed in the first direction X; in addition, the gears can also be arranged linearly in the direction perpendicular to the first direction X and the third direction Z.

[0057] Further, referring to Figures 2-4 and Figure 8In some embodiments, the housing 110 comprises a gear seat 112 for the specific arrangement of the plurality of gears. The gear seat 112 can have a plurality of gear grooves 1121 adapted to the gears (or the gear shafts 145 connected to the gears) so that the gear seat 112 serves as a support for each gear. Specifically, in some embodiments, the plurality of gears comprises a first gear 141, a second gear 142, a third gear 143, and a fourth gear 144, which are rotatably connected to the gear seat 112, respectively. The first gear 141 is fixedly connected to the first prong 120, the second gear 142 is fixedly connected to the second prong 130, and the third gear 143 and the fourth gear 144 are located between the first gear 141 and the second gear 142. Through the arrangement of the above four gears, the rotational axes of the first prong 120 and the second prong 130 can be positioned more reasonably while the rotational directions of the first prong 120 and the second prong 130 are opposite. More specifically, to facilitate rotation, the above gears (the first gear 141, the second gear 142, the third gear 143, and the fourth gear 144) can comprise gear shafts 145 (simultaneously, the first prong 120 and / or the second prong 130 can also be connected to the gear shafts 145), and the connection between the gear shafts 145 and the gear bodies or the prongs can be integral connection (glue connection, one-piece molding, etc.), or detachable connection. Each gear shaft 145 is correspondingly supported in each gear groove 1121 so that each gear can rotate freely. To facilitate support, the gear shaft 145 of the first gear 141 can be located between the first gear 141 and the first prong 120, the gear seat 112 supports the above gear shaft 145, the gear shaft 145 of the second gear 142 is designed similarly to the first gear 141, and the gear shafts 145 of the third gear 143 and the fourth gear 144 can be distributed on both sides of the gear body along the first direction X, and the gear seat 112 supports the gear shafts 145 on both sides, respectively.

[0058] For the specific arrangement of the housing 110, see Figure 1 、 Figure 3 and Figure 8In some embodiments, the housing 110 defines a receiving cavity 113, a first opening 114 and a second opening 115, both the first opening 114 and the second opening 115 being in communication with the receiving cavity 113. The first prong 120 and the second prong 130 are both located in the receiving cavity 113, and after the first prong 120 obtains driving force, the first prong 120 can rotate to extend out of the first opening 114, and the second prong 130 can rotate to extend out of the second opening 115. It can be understood that the receiving cavity 113 is an inner cavity structure of the housing 110 itself, and the first opening 114 and the second opening 115 can respectively allow the first prong 120 and the second prong 130 to extend out of the receiving cavity 113, so that the first prong 120 and the second prong 130 protrude from the plug-in side 111. It should be noted that the above-mentioned extending out of the first opening 114 and the second opening 115 can be all extending out or partially extending out.

[0059] For the manner in which the first prong 120 obtains driving force, see Figure 1 In some embodiments, the housing 110 further defines a third opening 116, the plane in which the third opening 116 is located is adjacent to the planes in which the first opening 114 and the second opening 115 are located, and the first prong 120 extends out of the third opening 116, so that the first prong 120 is adapted to be actuated and obtain driving force. It can be understood that since the third opening 116 is arranged beside the first opening 114 and the second opening 115, and the first prong 120 extends out of the third opening 116, the user can use the fingers to click the protruding part of the first prong 120, and make the first prong 120 rotate to extend out of the first opening 114, and at the same time, under the transmission action of the gear assembly 140, the second prong 130 rotates to extend out of the second opening 115, that is, the unfolding operation of the charger 100 is completed, and the folding operation of the charger 100 is opposite thereto. In other embodiments, the first prong 120 can also be driven by a driving device, for example, after the user presses a button, the first prong 120 is indirectly driven by other transmission structures, or the first prong 120 is driven by a control system.

[0060] In order to realize the electrical connection of the first prong 120 and the second prong 130, see Figures 4-7In some embodiments, the charger 100 further comprises a spring 150 and a circuit board 170, the spring 150 comprising a first end 151 electrically connected to the second pin 130 and a second end 152 electrically connected to the circuit board 170, the first end 151 being configured to deform and abut against the second pin 130 during the rotation of the second pin 130. In this way, the spring 150 can serve to electrically connect the second pin 130 and the circuit board 170 on the one hand, and on the other hand, by virtue of the spring 150 deforming and always abutting against the second pin 130 during the rotation of the second pin 130, the spring 150 can also serve to abut and position the second pin 130, specifically, the spring 150 can ensure that the pin can be stably fixed when inserted into the socket and can smoothly separate from the socket when withdrawn, thereby preventing accidental electric shock, and at the same time, the spring 150 can provide assistance when the second pin 130 is actuated, thereby reducing the operating force of the user and improving the user experience. Further, in some embodiments, the first end 151 has a plurality of gear grooves 1121, and the second pin 130 comprises a connecting end 131 for electrically connecting the socket and a protrusion 132, the first end 151 gradually extending towards the side close to the plug-in side 111 in the direction of the connecting end 131 pointing to the rotation axis of the second pin 130, so that the protrusion 132 can extend into any one of the gear grooves 1121 during the rotation of the second pin 130. The above arrangement can make the rotation position of the second pin 130 more stable and the rotation adjustment more convenient. Figure 6 In the embodiment shown, the gear grooves 1121 are provided in three, and the protrusion 132 comprises two provided in opposite circumferential directions R. By virtue of the cooperation between the protrusion 132 and the gear grooves 1121, the spring 150 can achieve a better positioning and boosting effect.

[0061] In addition, in some embodiments, the first pin 120 can also be provided with the spring 150 structure as described above, i.e., two springs 150 are connected to the first pin 120 and the second pin 130 in the same way; see Figures 2-3 In other embodiments, the first pin 120 can not be connected to the spring 150 structure, in which case the first pin 120 can not be electrically connected or can be electrically connected in other ways, and the positioning of the first pin 120 can be achieved by the clamping fit between the first pin 120 and the housing 110.

[0062] Referring to Figures 1-4In some embodiments, the charger 100 further comprises a third pin 160, which has the same structure as the second pin 130, and the second pin 130 and the third pin 160 are symmetrically distributed on both sides of the first pin 120, and the third pin 160 is rotationally connected to the shell 110, the gear assembly 140 comprises a first gear set 140A and a second gear set 140B, the first gear set 140A is located between the first pin 120 and the second pin 130 along the first direction X, and meshes with the first pin 120 and the second pin 130 respectively, and the second gear set 140B is located between the first pin 120 and the third pin 160 along the first direction X, and meshes with the first pin 120 and the third pin 160 respectively. It can be understood that the third pin 160 can form a three-pin charger 100 together with the first pin 120 and the second pin 130, and the first gear set 140A and the second gear set 140B can have the same structure, and the difference is only that the driven pin is different, and the other structures and aspects of the third pin 160 can be referred to the above-mentioned related descriptions of the first pin 120 and the second pin 130, which will not be repeated here.

[0063] For the specific structure of the first pin 120, the second pin 130 and the third pin 160, see Figure 3 In some embodiments, after the first pin 120, the second pin 130 and the third pin 160 are rotated to protrude from the plug-in side 111, along the first direction X, the size of the first pin 120 is smaller than the size of the second pin 130 and the third pin 160, and along the second direction Y perpendicular to the first direction X and the third direction Z, the size of the first pin 120 is larger than the size of the second pin 130 and the third pin 160. In addition, the cross-sectional shape of the first pin 120, the second pin 130 and the third pin 160 along the first direction X can all be rectangular. According to the above-mentioned arrangement, the charger 100 can be a three-pin charger 100, and the first pin 120 corresponds to the ground electrode, which is thicker and longer than the second pin 130 and the third pin 160, and its main function is to guide the leakage current of the electrical equipment to the ground to ensure the safety of the electrical equipment; the second pin 130 and the third pin 160 correspond to the live wire and the neutral wire respectively, and the two pins are relatively close in thickness and length, and the shape is square, and they are collectively responsible for transmitting electrical energy to make the electrical equipment work normally.

[0064] The above is only a preferred embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. Charger, characterized in that The charger comprises: a housing; a first prong rotatably connected to the housing; a second prong rotatably connected to the housing, the second prong being spaced apart from the first prong along a first direction; a gear assembly located between the first prong and the second prong along the first direction and engaging the first prong and the second prong respectively; wherein the first prong is capable of rotating along a circumferential direction after obtaining a driving force, and the gear assembly is capable of driving the second prong to rotate in a reverse direction of the circumferential direction.

2. The charger according to claim 1, wherein: the gear assembly comprises a plurality of gears, each of the gears being arranged along a second direction perpendicular to the first direction and engaging each other, the housing has a plug side along a third direction perpendicular to the first direction and the second direction, the plug side being configured to be matched with a socket, and the first prong and the second prong are both capable of rotating to protrude out of the plug side.

3. The charger according to claim 2, wherein: in a direction along an axis of rotation of the first prong pointing to an axis of rotation of the second prong, a line connecting rotation centers of each of the gears gradually extends towards a side close to the plug side.

4. The charger according to claim 2, wherein: the housing comprises a gear base, the plurality of gears comprises a first gear, a second gear, a third gear and a fourth gear rotatably connected to the gear base respectively, the first gear is fixedly connected to the first prong, the second gear is fixedly connected to the second prong, and the third gear and the fourth gear are located between the first gear and the second gear.

5. The charger according to claim 4, wherein: each of the first gear, the second gear, the third gear and the fourth gear comprises a gear shaft, and the gear base has a plurality of gear grooves, each of the gear shafts is supported in one of the gear grooves.

6. The charger according to claim 1, wherein: the housing defines a receiving cavity, a first opening, a second opening and a third opening, the first opening and the second opening both communicate with the receiving cavity, and the first prong and the second prong are both located in the receiving cavity, the first prong is capable of rotating to protrude out of the first opening and the second prong is capable of rotating to protrude out of the second opening after the first prong obtains the driving force, and a plane where the third opening is located is adjacent to planes where the first opening and the second opening are located, and the first prong protrudes out of the third opening so that the first prong is suitable to be pushed and obtain the driving force.

7. The charger according to claim 1, further comprising a resilient sheet and a circuit board, the resilient sheet comprises a first end and a second end, the first end is electrically connected to the second prong, the second end is electrically connected to the circuit board, and the first end is configured to deform and abut against the second prong during rotation of the second prong.

8. The charger according to claim 7, wherein: ​ The housing has a plug-in side along a third direction perpendicular to the first direction, the plug-in side being configured to mate with a socket, the first prong and the second prong are rotatable to protrude from the plug-in side, the first end has a plurality of recesses, the second prong includes a connecting end configured to electrically connect with the socket and a protrusion, the first end gradually extends towards a side closer to the plug-in side along a direction pointing to an axis of rotation of the second prong, and the protrusion is capable of extending into any of the recesses during rotation of the second prong.

9. The charger of claim 1, wherein The charger further includes a third prong identical to the second prong, the second prong and the third prong are symmetrically distributed on two sides of the first prong, the third prong is rotatably connected to the housing, the gear assembly includes a first gear set and a second gear set, the first gear set is located between the first prong and the second prong along the first direction and engages the first prong and the second prong respectively, and the second gear set is located between the first prong and the third prong along the first direction and engages the first prong and the third prong respectively.

10. The charger of claim 9, wherein The housing has a plug-in side along a third direction perpendicular to the first direction, the plug-in side being configured to mate with a socket, the first prong, the second prong and the third prong are rotatable to protrude from the plug-in side, after the first prong, the second prong and the third prong are rotated to protrude from the plug-in side, the first prong has a size smaller than the second prong and the third prong along the first direction, and the first prong has a size larger than the second prong and the third prong along a second direction perpendicular to the first direction and the third direction.

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