Folding plug

Abstract

The utility model relates to the technical field of plugs, and discloses a folding plug, which comprises a seat body, a rotating shaft, insertion sheets and an elastic piece, and is characterized in that the seat body is provided with an accommodating groove; the rotating shaft is rotationally arranged on the seat body, and a convex part is convexly arranged on the peripheral surface of the rotating shaft; the insertion piece is arranged in the accommodating groove, is connected to the peripheral surface of the rotating shaft, and forms an angle with the lug boss; at least part of the elastic piece surrounds the radial direction of the rotating shaft, one end of the elastic piece is connected with the base body, and the other end of the elastic piece abuts against the protruding part. The insertion piece can turn over under the action of external force, so that the rotating shaft drives the protruding part to rotate relative to the central axis of the rotating shaft. The protruding part is used for rotating to the first position when the inserting piece is folded in the containing groove and abuts against the elastic piece. The protruding part is further used for rotating to the second position when the inserting piece is overturned out of the containing groove and abutting against the elastic piece. The utility model aims to solve the technical problems that the insertion sheet structure is easy to lose efficacy after being used for a certain number of times, and the folding service life of the insertion sheet is relatively short.

Description

Technical Field

[0001] This utility model relates to the field of plug technology, and in particular to a folding plug. Background Technology

[0002] Currently, traditional plugs generally have long prongs, making them inconvenient for users to carry when traveling. To address this issue, the industry has developed foldable plug technology, which allows the prongs to be folded and stored inside the plug body when not in use, thereby reducing the space occupied by the plug and improving the product's portability and safety.

[0003] However, the existing plug-in structure is prone to failure after a certain number of uses, and the folding life of the plug-in is relatively short. Once the plug-in fails, it will fold and retract into the plug, or it will not be able to maintain its folded state stably after being folded and retracted, which seriously affects the normal use of the plug and the user experience. Utility Model Content

[0004] The purpose of this invention is to provide a folding plug to solve the technical problem that the plug structure is prone to failure after a certain number of uses and the folding life of the plug is relatively short.

[0005] To achieve the above objectives, this utility model provides a folding plug, which includes:

[0006] The base is provided with a receiving groove;

[0007] A rotating shaft is rotatably mounted on the base, and a protrusion is provided on the outer circumferential surface of the rotating shaft;

[0008] An insert is disposed in the receiving groove, the insert is connected to the outer peripheral surface of the rotating shaft, and is set at an angle to the protrusion;

[0009] An elastic element, at least a portion of which is radially arranged around the rotating shaft, one end of which is connected to the seat, and the other end of which abuts against the protrusion;

[0010] The insert can be flipped under the action of external force, so that the rotating shaft drives the protrusion to rotate relative to the central axis of the rotating shaft;

[0011] The protrusion is used to rotate to a first position when the insert is folded into the receiving groove and abuts against the elastic member; the protrusion is also used to rotate to a second position when the insert is flipped out of the receiving groove and abuts against the elastic member.

[0012] In the folding plug of this application, the elastic element includes a first piece, a second piece, and a third piece, which are connected in sequence; the first piece and the second piece form an obtuse angle, and the second piece and the third piece form an acute angle.

[0013] The first piece abuts against the protrusion, the third piece connects to the seat, and the second piece and the third piece surround the radial direction of the rotating shaft and are spaced apart from the outer peripheral surface of the rotating shaft.

[0014] In the folding plug of this application, the connection between the first piece and the second piece, as well as the connection between the second piece and the third piece, are all smooth transitions.

[0015] In the folding plug of this application, the distance between the connection point of the first piece and the second piece and the central axis of the rotating shaft is L1, and the distance between the connection point of the second piece and the third piece and the central axis of the rotating shaft is L2; ​​wherein, L1 is less than L2.

[0016] In the folding plug of this application, the folding plug includes a cover body, which covers the pivot and is connected to the base body to enclose and form an accommodating space, and the pivot and the elastic element are disposed within the accommodating space;

[0017] The insert can be flipped under external force, so that the rotating shaft drives the protrusion to rotate relative to the central axis of the rotating shaft within the accommodating space.

[0018] In the folding plug of this application, the cover body has a first mounting hole on the side facing the base body;

[0019] The elastic element further includes a fourth piece, which is connected to the end of the third piece away from the second piece, and the fourth piece is provided with a second mounting hole;

[0020] The folding plug includes a first fastener that passes through the first mounting hole and the second mounting hole to connect the elastic element to the cover.

[0021] In the folding plug of this application, the cover body is provided with a third mounting hole on the side facing the base body, and the base body is provided with a fourth mounting hole corresponding to the position of the third mounting hole;

[0022] The folding plug includes a second fastener that passes through the third mounting hole and the fourth mounting hole to connect the cover to the base.

[0023] In the folding plug of this application, the first piece, the second piece, the third piece, and the fourth piece are integrally formed.

[0024] In the folding plug of this application, the pivot includes a shaft and two mounting portions, which are respectively disposed at both ends of the shaft. The protrusion is disposed on the outer peripheral surface of the shaft. There are two inserts, and each insert is connected to each mounting portion in a one-to-one correspondence.

[0025] In the folding plug of this application, the folding plug further includes two conductive springs disposed on the base body. The two conductive springs are respectively located on both sides of the axial direction of the rotating shaft, and each conductive spring is connected to each of the inserts in a one-to-one correspondence.

[0026] This invention provides a folding plug. When the plug needs to be flipped out of the receiving slot, an external force is applied to push the plug, causing it to flip and rotate the shaft, thus rotating the protrusion from a first position to a second position. During rotation, the protrusion abuts against an elastic element. When the protrusion rotates to the second position and abuts against the elastic element when the plug is flipped out of the receiving slot, it stably maintains the plug in the unfolded state. When the protrusion rotates to the first position and abuts against the elastic element when the plug is folded back into the receiving slot, it stably maintains the plug in the folded state. Compared to a flat elastic element, the elastic element in this embodiment has a curved structure, which has stronger fatigue resistance and can increase the service life of the elastic element, thereby increasing the number of times the plug can be folded. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the folding plug provided in an embodiment of the present utility model;

[0029] Figure 2 for Figure 1 Another structural diagram from a different perspective;

[0030] Figure 3 An exploded view of the folding plug provided in an embodiment of this utility model;

[0031] Figure 4 Another exploded view of the folding plug provided in this embodiment of the utility model;

[0032] Figure 5A schematic diagram of the structure of the elastic element provided in the embodiment of this utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the rotating shaft provided in an embodiment of the present utility model;

[0034] Figure 7 A cross-sectional schematic diagram of the folding plug provided in this embodiment of the utility model when folded;

[0035] Figure 8 for Figure 7 A magnified view of a portion of point A in the middle.

[0036] The markings in the image are as follows:

[0037] 1. Base; 11. Receiving groove; 12. Fourth mounting hole; 2. Rotating shaft; 21. Shaft body; 22. Mounting part; 3. Insert; 4. Elastic element; 41. First piece; 42. Second piece; 43. Third piece; 44. Fourth piece; 45. Second mounting hole; 5. Protrusion; 6. Cover; 61. First mounting hole; 62. Third mounting hole; 7. First fastener; 8. Second fastener; 9. Conductive spring; 100. Folding plug. Detailed Implementation

[0038] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0039] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer" and other terms used in this utility model to indicate the orientation or positional relationship are based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device and components referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0041] like Figures 1 to 7As shown, this utility model embodiment provides a folding plug 100, which includes a base 1, a rotating shaft 2, a plug 3, and an elastic member 4. The base 1 is provided with a receiving groove 11; the rotating shaft 2 is rotatably mounted on the base 1, and a protrusion 5 is provided on the outer peripheral surface of the rotating shaft 2; the plug 3 is disposed in the receiving groove 11, the plug 3 is connected to the outer peripheral surface of the rotating shaft 2, and is set at an angle to the protrusion 5; at least a portion of the elastic member 4 is arranged radially around the rotating shaft 2, one end of the elastic member 4 is connected to the base 1, and the other end of the elastic member 4 abuts against the protrusion 5; wherein, the plug 3 can be flipped under the action of external force, so that the rotating shaft 2 drives the protrusion 5 to rotate relative to the central axis of the rotating shaft 2; the protrusion 5 is used to rotate to a first position when the plug 3 is folded in the receiving groove 11 and abuts against the elastic member 4; the protrusion 5 is also used to rotate to a second position when the plug 3 is flipped out of the receiving groove 11 and abuts against the elastic member 4.

[0042] In this embodiment, the base 1 is the main body of the folding plug 100 and can be made of insulating material to ensure safe use. A receiving groove 11 is formed at the bottom of the base 1, and its shape and size match the plug 3 so that the plug 3 can be folded and stored therein.

[0043] The rotating shaft 2 is rotatably mounted on the base 1. The plug 3 is a conductive structure of the folding plug 100 and can be made of conductive material. One end of the plug 3 is connected to the outer circumference of the rotating shaft 2, so that the plug 3 can flip as the rotating shaft 2 rotates. The other end of the plug 3 is used to insert into the socket for conduction.

[0044] The elastic element 4 is made of a high-strength, high-elasticity material, such as spring steel or spring sheet. The elastic element 4 is arranged radially around the rotating shaft 2 at least partially, with one end connected to the fixed position of the seat 1 and the other end abutting against the protrusion 5.

[0045] The protrusion 5 has a first position and a second position (not shown) on the side facing the base 1. In the radial direction of the rotating shaft 2, the first position and the second position of the protrusion 5 are located on opposite sides of the rotating shaft 2.

[0046] Based on the above technical solution, when it is necessary to flip the insert 3 out of the receiving groove 11, an external force is applied to push the insert 3. Under the action of the external force, the insert 3 flips and drives the rotating shaft 2 to rotate, so that the protrusion 5 rotates from the first position to the second position. During the rotation, the protrusion 5 abuts against the elastic member 4. When the protrusion 5 rotates to the second position when the insert 3 flips out of the receiving groove 11, it abuts against the elastic member 4 to stably keep the insert 3 in the unfolded state; when the protrusion 5 rotates to the first position when the insert 3 is folded in the receiving groove 11, it abuts against the elastic member 4 to stably keep the insert 3 in the folded state. During the rotation of the protrusion 5, the elastic member 4 is deformed by the compression of the protrusion 5, that is, the elastic member 4 abuts against the protrusion 5 to keep the protrusion 5 in the current state, thereby keeping the insert 3 in the unfolded or folded state.

[0047] In the radial direction of the rotating shaft 2, the elastic element 4 is at least partially arranged around the rotating shaft 2. One end of the elastic element 4 is connected to the fixed position of the base 1, and the other end abuts against the protrusion 5. Compared with the flat structure of the elastic element, the elastic element 4 in this embodiment has a curved structure, which has stronger fatigue resistance and can slow down the aging rate of the deformation area of ​​the elastic element 4, thereby improving the service life of the elastic element 4 and increasing the number of folds of the plug 3. In practical applications, it has been found that compared with the existing plug that can be folded 5,000 times, the elastic element 4 of this embodiment, which has a more curved structure and a longer length, can make the plug fold at least 10,000 times. By improving the shape and structure of the elastic element 4 and its arrangement, the number of folds and the folding life of the plug 3 can be increased.

[0048] In this embodiment, using external force to flip the insert 3 allows it to fold, which helps reduce the space occupied by the folding plug 100 and facilitates its storage and carrying. For example, as shown... Figure 7 As shown, when the insert 3 is in a horizontal position (i.e., in a folded state), the protrusion 5 rotates to the first position and abuts against the elastic member 4, locking the insert 3 after folding and keeping it in a horizontal position. This ensures the stability of the folded state of the insert 3 and improves its folding stability. When the insert 3 is flipped using external force to change from a horizontal to a vertical position (i.e., from a folded to an unfolded state), the insert 3 drives the rotating shaft 2 to rotate 90 degrees from 0 degrees. This causes the protrusion 5 to rotate from the first position to the second position along the front-back direction. When the protrusion 5 rotates to the second position, it abuts against the elastic member 4, keeping the rotating shaft 2 at a 90-degree position and the insert 3 in a vertical position. This ensures the unfolded state of the insert 3 remains stable, guaranteeing that the insert 3 can be inserted into the socket with a force perpendicular to the rotating shaft 2.

[0049] In one embodiment, such as Figure 5 and Figure 8As shown, the elastic element 4 includes a first piece 41, a second piece 42, and a third piece 43, which are connected in sequence. The first piece 41 and the second piece 42 form an obtuse angle, and the second piece 42 and the third piece 43 form an acute angle. The first piece 41 abuts against the protrusion 5, and the third piece 43 is connected to the seat 1. The second piece 42 and the third piece 43 are arranged radially around the rotating shaft 2 and have a distance between them and the outer peripheral surface of the rotating shaft 2.

[0050] Specifically, the elastic element 4 can be a spring sheet structure, comprising a first sheet 41, a second sheet 42, and a third sheet 43 connected in sequence. The lower end of the first sheet 41 extends downwards and abuts against the protrusion 5, while the upper end of the first sheet 41 extends upwards and connects to the second sheet 42. The upward extension direction of the first sheet 41 forms a certain angle with the vertical direction of the folding plug 100, i.e., the first sheet 41 extends obliquely upwards to connect with the second sheet 42. The second sheet 42 also extends obliquely upwards to connect with the third sheet 43, but the angle of the second sheet 42's upward extension is greater, so that an obtuse angle is formed between the first sheet 41 and the second sheet 42. The third sheet 43 extends obliquely downwards and forms an acute angle with the second sheet 42. The first sheet 41, the second sheet 42, and the third sheet 43 are connected to form a spring sheet structure resembling an irregular U-shape.

[0051] During installation, the second piece 42 and the third piece 43 together surround the radial direction of the rotating shaft 2, maintaining a certain distance from the outer circumference of the rotating shaft 2. This ensures that the rotating shaft 2 is covered by the elastic element 4, and the elastic element 4 and the protrusion 5 always maintain a resisting state, without hindering the rotation of the rotating shaft 2. Because the first piece 41, the second piece 42, and the third piece 43 are connected to form a relatively curved structure, the connection points of the first piece 41 and the second piece 42, as well as the connection points of the second piece 42 and the third piece 43, are stress concentration points. This makes the elastic element 4 more fatigue-resistant, less prone to breakage, and thus improves the service life of the elastic element 4, increasing the number of folds and the folding life of the insert 3.

[0052] In one embodiment, such as Figure 5 As shown, the connection between the first piece 41 and the second piece 42, as well as the connection between the second piece 42 and the third piece 43, are all smooth transitions.

[0053] Specifically, during the repeated movement of the elastic element 4, the connection between the first piece 41 and the second piece 42, as well as the connection between the second piece 42 and the third piece 43, are stress concentration areas. In this embodiment, the two connection points are designed with a smooth transition, which can disperse the stress concentration at the connection points and reduce the risk of breakage at the connection points.

[0054] In one embodiment, such as Figure 8As shown, the distance between the connection point of the first piece 41 and the second piece 42 and the central axis of the rotating shaft 2 is L1, and the distance between the connection point of the second piece 42 and the third piece 43 and the central axis of the rotating shaft 2 is L2; ​​wherein, L1 is less than L2.

[0055] Specifically, since L1 is smaller than L2, in the vertical direction of the folding plug 100, with the horizontal central axis of the rotating shaft 2 as the reference line, the relative height at the connection between the first piece 41 and the second piece 42 is smaller than the relative height at the connection between the second piece 42 and the third piece 43, so that the elastic element 4 presents a curved structure with the left side lower and the right side higher. When the protrusion 5 abuts against the first piece 41, the degree of bending of the first piece 41 relative to the second piece 42 is smaller than the degree of bending of the second piece 42 relative to the third piece 43, reducing the risk of breakage of the elastic element 4 due to stress concentration, thereby improving the fatigue resistance of the elastic element 4.

[0056] In one embodiment, such as Figure 1 , Figure 3 and Figure 4 As shown, the folding plug 100 includes a cover 6, which covers the rotating shaft 2 and is connected to the base 1 to enclose and form an accommodating space. The rotating shaft 2 and the elastic element are disposed in the accommodating space. The insert 3 can be flipped under the action of external force so that the rotating shaft 2 drives the protrusion 5 to rotate relative to the central axis of the rotating shaft 2 within the accommodating space.

[0057] Specifically, the cover 6 is designed in shape and size to fit snugly onto the rotating shaft 2. The cover 6 and the base 1 can be connected together by screws, snaps, or other means to form a closed or semi-closed accommodating space. The inner surface (or lower surface) of the cover 6 is provided with grooves or other structures that are adapted to the rotating shaft 2 and the elastic element 4 to ensure that the rotating shaft 2 and the elastic element 4 can be placed within the accommodating space.

[0058] In one embodiment, such as Figure 5 and Figure 7 As shown, the cover 6 has a first mounting hole 61 on the side facing the base 1; the elastic member 4 also includes a fourth piece 44, which is connected to the end of the third piece 43 away from the second piece 42, and the fourth piece 44 has a second mounting hole 45; the folding plug 100 includes a first fastener 7, which passes through the first mounting hole 61 and the second mounting hole 45 to connect the elastic member 4 to the cover 6.

[0059] Specifically, the third piece 43 extends horizontally to the right and is connected to the fourth piece 44. The first fastener 7 is inserted into the first mounting hole 61 on the cover 6 and the second mounting hole 45 on the fourth piece 44, thereby firmly connecting the elastic element 4 between the cover 6 and the base 1. By inserting the first fastener 7 into the first mounting hole 61 and the second mounting hole 45 and tightening it appropriately, a stable connection is formed between the elastic element 4 and the base 1, preventing the elastic element 4 from falling off or loosening, and improving the stability and reliability of the folding plug 100.

[0060] The first fastener 7 can be a screw, bolt, or other type of connector.

[0061] In one embodiment, the right side of the fourth piece 44 is provided with an upwardly extending snap-fit ​​portion, and the side of the cover 6 facing the base 1 is provided with a snap-fit ​​groove corresponding to the position of the snap-fit ​​portion. The snap-fit ​​portion is embedded in the snap-fit ​​groove so that the elastic member 4 is further fixedly connected to the bottom surface of the cover 6.

[0062] In one embodiment, such as Figure 4 As shown, the cover 6 has a third mounting hole 62 on the side facing the base 1, and the base 1 has a fourth mounting hole 12 corresponding to the position of the third mounting hole 62; the folding plug 100 includes a second fastener 8, which passes through the third mounting hole 62 and the fourth mounting hole 12 to connect the cover 6 to the base 1.

[0063] Specifically, the second fastener 8 can be a screw, bolt or other type of connector. By inserting the second fastener 8 into the third mounting hole 62 of the cover 6 and the fourth mounting hole 12 of the base 1 and tightening it appropriately, a stable connection can be formed between the cover 6 and the base 1, so that the folding plug 100 can withstand various forces and vibrations generated during use, and ensure the stability and reliability of the folding plug 100.

[0064] In one embodiment, such as Figure 5 As shown, the first piece 41, the second piece 42, the third piece 43, and the fourth piece 44 are integrally formed structures.

[0065] Specifically, the first piece 41, the second piece 42, the third piece 43, and the fourth piece 44 are not connected by traditional welding, riveting, or bonding methods, but are formed into a single structure through an integral molding process (such as injection molding or stamping). It is understood that by using an integral molding method, the elastic element 4 eliminates the connection gaps between the individual pieces, reducing the risk of breakage at the joints. Because the elastic element 4 is integrally molded, this embodiment can select materials with high elasticity and high strength to manufacture the elastic element 4, which not only improves the elastic force and recovery force of the elastic element 4, but also enhances its fatigue resistance and aging resistance.

[0066] In one embodiment, such as Figure 4 and Figure 6 As shown, the rotating shaft 2 includes a shaft body 21 and two mounting parts 22. The two mounting parts 22 are respectively disposed at both ends of the shaft body 21 in the axial direction. The protrusion 5 is disposed on the outer peripheral surface of the shaft body 21. There are two inserts 3, and each insert 3 is connected to each mounting part 22 in a corresponding manner.

[0067] Specifically, the two mounting parts 22 are integrally formed and connected to the two ends of the shaft body 21, and the protrusion 5 is provided on the outer peripheral surface of the shaft body 21. The protrusion 5 can be a protruding part on the shaft body 21, or the protrusion 5 can be integrally formed and connected to the outer peripheral surface of the shaft body 21.

[0068] The device includes two prongs 3, which are connected to the positive and negative terminals (or live and neutral wires) of the socket to form a complete current loop, ensuring that current can be smoothly transmitted to the electronic device through the folding plug 100. Each of the two prongs 3 corresponds to one of the two mounting parts 22, and the prongs 3 are connected to the mounting parts 22. When the rotating shaft 2 rotates, the two mounting parts 22 cause the two prongs 3 to flip together, achieving both folded and unfolded states for the prongs 3.

[0069] In one embodiment, such as Figure 3 and Figure 4 As shown, the folding plug 100 also includes two conductive springs 9 disposed on the base 1. The two conductive springs 9 are located on both sides of the axial direction of the rotating shaft 2, and each conductive spring 9 is connected to each plug 3 in a one-to-one correspondence.

[0070] Specifically, the two conductive springs 9 are located on opposite sides of the axial direction of the rotating shaft 2, and do not affect the rotation of the rotating shaft 2. The conductive springs 9 can be made of metal sheets or other conductive materials. The conductive springs 9 are connected to the inserts 3 to transmit current through the inserts 3 to the conductive springs 9.

[0071] In some embodiments, the base 1 further includes an upper shell (not shown in the figures), which covers the base 1 and has a charging port electrically connected to the conductive spring 9 for connecting a charging cable.

[0072] It should be understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, herein, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system.

[0073] The sequence numbers of the above-described embodiments of this utility model are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above descriptions are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A folding plug, characterized in that, include: The base is provided with a receiving groove; A rotating shaft is rotatably mounted on the base, and a protrusion is provided on the outer circumferential surface of the rotating shaft; An insert is disposed in the receiving groove, the insert is connected to the outer peripheral surface of the rotating shaft, and is set at an angle to the protrusion; An elastic element, at least a portion of which is radially arranged around the pivot, one end of which is connected to the seat and the other end of which abuts against the protrusion; The insert can be flipped under the action of external force, so that the rotating shaft drives the protrusion to rotate relative to the central axis of the rotating shaft; The protrusion is used to rotate to a first position when the insert is folded into the receiving groove and abuts against the elastic member; the protrusion is also used to rotate to a second position when the insert is flipped out of the receiving groove and abuts against the elastic member.

2. The folding plug according to claim 1, characterized in that, The elastic element includes a first sheet, a second sheet, and a third sheet, which are connected sequentially; the first sheet and the second sheet form an obtuse angle, and the second sheet and the third sheet form an acute angle. The first piece abuts against the protrusion, the third piece connects to the seat, and the second piece and the third piece surround the radial direction of the rotating shaft and are spaced apart from the outer peripheral surface of the rotating shaft.

3. The folding plug according to claim 2, characterized in that, The connection between the first piece and the second piece, as well as the connection between the second piece and the third piece, are all smooth transitions.

4. The folding plug according to claim 3, characterized in that, The distance between the connection point of the first piece and the second piece and the central axis of the rotating shaft is L1, and the distance between the connection point of the second piece and the third piece and the central axis of the rotating shaft is L2; ​​wherein, L1 is less than L2.

5. The folding plug according to claim 2, characterized in that, The folding plug includes a cover that covers the pivot and is connected to the base to enclose and form an accommodating space. The pivot and the elastic element are disposed within the accommodating space. The insert can be flipped under external force, so that the rotating shaft drives the protrusion to rotate relative to the central axis of the rotating shaft within the accommodating space.

6. The folding plug according to claim 5, characterized in that, The cover body has a first mounting hole on the side facing the base body; The elastic element further includes a fourth piece, which is connected to the end of the third piece away from the second piece, and the fourth piece is provided with a second mounting hole; The folding plug includes a first fastener that passes through the first mounting hole and the second mounting hole to connect the elastic element to the cover.

7. The folding plug according to claim 6, characterized in that, The cover body has a third mounting hole on the side facing the base body, and the base body has a fourth mounting hole corresponding to the position of the third mounting hole; The folding plug includes a second fastener that passes through the third mounting hole and the fourth mounting hole to connect the cover to the base.

8. The folding plug according to claim 6, characterized in that, The first piece, the second piece, the third piece, and the fourth piece are integrally formed.

9. The folding plug according to claim 1, characterized in that, The rotating shaft includes a shaft body and two mounting parts, which are respectively disposed at both ends of the shaft body. The protrusion is disposed on the outer peripheral surface of the shaft body. There are two inserts, and each insert is connected to each mounting part in a one-to-one correspondence.

10. The folding plug according to claim 9, characterized in that, The folding plug also includes two conductive spring contacts disposed on the base body. The two conductive spring contacts are respectively located on both sides of the axial direction of the rotating shaft, and each conductive spring contact is connected to each of the inserts in a one-to-one correspondence.

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