Connector structure

Abstract

The utility model provides a connector structure. The connector structure comprises a shell, a first bayonet socket, a second bayonet socket and an elastic terminal, the shell comprises a movable part and a setting part; the first bayonet socket is arranged on the movable part; the second bayonet socket is arranged on the movable part and is opposite to the first bayonet socket; one end of the elastic terminal is arranged on the setting part, one side of the elastic terminal is arranged on the first bayonet socket, and the other side of the elastic terminal is arranged on the second bayonet socket. Therefore, the circuit carrier plate can be respectively inserted into the first bayonet socket and the second bayonet socket, the elastic terminals are used for required electrical connection, and the movable part is matched with the elastic terminals to provide required displacement for the first bayonet socket and the second bayonet socket, so that the circuit carrier plate can be stably inserted into the first bayonet socket and the second bayonet socket; and better electrical characteristics are achieved during use.

Description

Technical Field

[0001] The utility model relates to a connector structure, in particular to a connector structure which can provide a required displacement to achieve a stable plugging connection and has better electrical characteristics. Background Art

[0002] Generally, a relay-type connector is used as the electrical connection between two circuit carriers.

[0003] However, conventional connectors are not designed with a displacement mechanism, which can easily cause the circuit board to become loose or worn due to vibrations from external objects. This can prevent the circuit board from being securely plugged into the connector, affecting electrical properties.

[0004] Therefore, how to develop a connector structure to achieve a stable plug connection and better electrical characteristics, so as to effectively improve the shortcomings of the traditional technology, will be the active disclosure of the present invention. Utility Model Content

[0005] In view of the shortcomings of the above-mentioned traditional technology, the inventor felt that it was not perfect, so he devoted his mind to carefully research and overcome it, and then developed a connector structure that can provide the required displacement so that the circuit carrier can be firmly plugged in and achieve better electrical characteristics during use.

[0006] To achieve the above-mentioned and other purposes, the present invention provides a connector structure comprising: a housing, a first socket, a second socket, and a plurality of elastic terminals. The housing comprises a movable portion and a setting portion, the movable portion being disposed within the housing, the movable portion communicating with both ends of the housing and extending to both sides of the housing, the setting portion communicating with the movable portion and being located at the inner bottom of the housing; the first socket being disposed on the movable portion; the second socket being disposed on the movable portion and facing away from the first socket; one end of each elastic terminal being disposed on the setting portion, with one side of each elastic terminal being disposed on the first socket and the other side of each elastic terminal being disposed on the second socket.

[0007] In one embodiment of the present invention, the movable portion is provided with a first movable space, a second movable space and a third movable space. The first movable space is provided in the shell and connected to both ends of the shell, the second movable space is provided in the shell and connected to one side of the first movable space, the third movable space is provided in the shell and connected to the other side of the first movable space, and the setting portion is connected to the first movable space.

[0008] In one embodiment of the present invention, the first socket and the second socket are arranged in the first activity space, one side of the first socket and one side of the second socket are arranged in the second activity space, and the other side of the first socket and the other side of the second socket are arranged in the third activity space.

[0009] In an embodiment of the present invention, the setting portion is provided with a plurality of slots, and one end of the elastic terminal is respectively provided in the slots.

[0010] In one embodiment of the present invention, the first socket includes a first socket portion, multiple first plug-in portions, at least two first buckle bodies, a first limiting portion and a second limiting portion. The first socket portion is arranged at one end of the first socket, the first plug-in portions are respectively arranged at the other end of the first socket and are connected to the first socket portion, the first buckle bodies are respectively arranged on the inner side of the first socket portion, the first limiting portion is arranged on one side of the first socket, the second limiting portion is arranged on the other side of the first socket, and the first limiting portion is located on one side of the movable portion, the second limiting portion is located on the other side of the movable portion, and one side of the elastic terminal is respectively arranged on the first plug-in portion and extends to the first socket portion.

[0011] In one embodiment of the present invention, the second socket includes a second socket portion, multiple second plug-in portions, at least two second buckle bodies, a third limiting portion and a fourth limiting portion. The second socket portion is arranged at one end of the second socket, the second plug-in portions are respectively arranged at the other end of the second socket and connected to the second socket portion, the second buckle bodies are respectively arranged on the inner side of the second socket portion, the third limiting portion is arranged on one side of the second socket, the fourth limiting portion is arranged on the other side of the second socket, and the third limiting portion is located on one side of the movable portion, the fourth limiting portion is located on the other side of the movable portion, and the other side of the elastic terminal is respectively arranged on the second plug-in portion and extends to the second socket portion.

[0012] In one embodiment of the present invention, the elastic terminal respectively includes an elastic portion, a first connecting portion, a second connecting portion, a first transmission portion, a second transmission portion, a first abutting top portion and a second abutting top portion, the first connecting portion and the second connecting portion are connected to the top end of the elastic portion, the first transmission portion and the first abutting top portion are correspondingly arranged on one side of the first connecting portion, the second transmission portion and the second abutting top portion are correspondingly arranged on one side of the second connecting portion, the elastic portion is located on the outside of the bottom of the first socket and the second socket, and the elastic portion is arranged on the setting portion, the first transmission portion and the first abutting top portion are correspondingly arranged on the inner side of the first socket, and the second transmission portion and the second abutting top portion are correspondingly arranged on the inner side of the second socket.

[0013] In one embodiment of the present invention, the elastic terminal further includes two first interference portions and two second interference portions, wherein the first interference portion is arranged on one side of the first connecting portion, and the second interference portion is arranged on one side of the second connecting portion. The first interference portions are respectively combined with the inner side of the first socket, and the second interference portions are respectively combined with the inner side of the second socket.

[0014] Thus, the connector structure of the present invention allows the circuit carrier to be plugged into the first and second sockets respectively, and the required electrical connection is achieved by the elastic terminals. The movable portion cooperates with the elastic terminals to provide the required displacement between the first and second sockets, allowing the circuit carrier to be firmly plugged into the first and second sockets, thereby achieving better electrical characteristics during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] [ Figure 1 ] is a schematic diagram of the appearance of a preferred specific embodiment of the present utility model.

[0016] [ Figure 2 ] is a schematic diagram of an exploded view of a preferred embodiment of the present utility model.

[0017] [ Figure 3 ] is a schematic diagram of a preferred specific embodiment of the elastic terminal of the present invention.

[0018] [ Figure 4 ] is a schematic diagram of the use status of the preferred embodiment of the utility model Figure 1 .

[0019] [ Figure 5 ] is a schematic diagram of the use status of the preferred embodiment of the utility model Figure 2 .

[0020] [ Figure 6 ] is a schematic diagram of the use status of the preferred embodiment of the utility model Figure 3 .

[0021] [ Figure 7 ] is a schematic diagram of the use status of the preferred embodiment of the utility model Figure 4 .

[0022] Description of Reference Numerals

[0023] 1 shell

[0024] 11 Activities Department

[0025] 111 First Activity Space

[0026] 112 Second Activity Space

[0027] 113 Third Activity Space

[0028] 114 inner ceiling wall

[0029] 115 inner bottom wall

[0030] 116 inner wall

[0031] 117 inner wall

[0032] 12. Settings

[0033] 121 slots

[0034] 13 Upper cover

[0035] 14 Lower cover

[0036] 2First socket

[0037] 21 First socket

[0038] 22 First Insertion Department

[0039] 23 First button

[0040] 24 First limiter

[0041] 25 Second limiter

[0042] 3 Second socket

[0043] 31 Second socket

[0044] 32 Second insertion section

[0045] 33 Second buckle

[0046] 34 The third limiter

[0047] 35 Fourth limiter

[0048] 4 elastic terminals

[0049] 41 elastic part

[0050] 42 First connection part

[0051] 43 Second connection

[0052] 44 First Transmission Department

[0053] 45 Second Transmission Department

[0054] 46 First reach top

[0055] 47 Second time to the top

[0056] 48 First Interference Unit

[0057] 49 Second Interference Unit

[0058] 5. Circuit board

[0059] 51 circuit contacts

[0060] 52 buttonholes

[0061] 6 circuit board

[0062] 61 circuit contacts

[0063] 62 buttonholes. DETAILED DESCRIPTION

[0064] In order to fully understand the purpose, features and effects of the present invention, the present invention is now described in detail through the following specific embodiments and the accompanying drawings. The description is as follows:

[0065] See also Figures 1 to 7 , as shown in the figure: The utility model provides a connector structure, which at least includes a shell 1, a first plug socket 2, a second plug socket 3 and a plurality of elastic terminals 4.

[0066] The housing 1 includes a movable portion 11 and a setting portion 12. The movable portion 11 is arranged in the housing 1. The movable portion 11 connects the two ends of the housing 1 and extends to both sides of the housing 1. The setting portion 12 connects the movable portion 11 and is located at the inner bottom of the housing 1. The housing 1 can be made of plastic and can be an integrated design, or the housing 1 can be a combination of an upper cover 13 and a lower cover 14. In the present invention, the combination of the upper cover 13 and the lower cover 14 is an embodiment.

[0067] The first socket 2 is disposed on the movable portion 11 , and the first socket 2 can be made of plastic.

[0068] The second socket 3 is disposed on the movable portion 11 and faces away from the first socket 2 . The second socket 3 can be made of plastic.

[0069] One end of the elastic terminal 4 is respectively provided on the setting portion 12, and one side of the elastic terminal 4 is provided on the first socket 2, and the other side of the elastic terminal 4 is provided on the second socket 3. The elastic terminal 4 can produce an insulating effect through the cooperation of the housing 1, the first socket 2 and the second socket 3 to prevent the elastic terminal 4 from accidentally contacting and causing a short circuit.

[0070] When in use, the present invention can be installed in a car as a relay connector for connecting two circuit carriers 5 and 6. The circuit carriers 5 and 6 can be respectively connected to the first socket 2 and the second socket 3, and the elastic terminals 4 are used to perform the required electrical connection. The movable portion 11 cooperates with the elastic terminals 4 to provide the displacement required for the first socket 2 and the second socket 3 to be connected and used, so that the circuit carriers 5 and 6 can be respectively firmly connected to the first socket 2 and the second socket 3, thereby achieving better electrical characteristics during use.

[0071] In addition to the above embodiments, in one embodiment of the present invention, it is different from the above embodiments in that the movable part 11 is provided with a first movable space 111, a second movable space 112 and a third movable space 113, the first movable space 111 is provided in the shell 1 and connected to both ends of the shell 1, the second movable space 112 is provided in the shell 1 and connected to one side of the first movable space 111, the third movable space 113 is provided in the shell 1 and connected to the other side of the first movable space 111, the setting part 12 is connected to the first movable space 111, and the first socket 2 and the second socket 3 are provided in the first movable space 111, one side of the first socket 2 and one side of the second socket 3 are provided in the second movable space 112, and the other side of the first socket 2 and the other side of the second socket 3 are provided in the third movable space 113.

[0072] Based on the above embodiment, when the circuit carriers 5 and 6 are plugged into the first socket 2 and the second socket 3, if vibration occurs due to the external environment, the first movable space 111 of the movable portion 11 can cooperate with the elastic terminal 4 to provide the first socket 2 and the second socket 3 with a displacement amount for longitudinal movement (upward and downward movement); and the first movable space 111, the second movable space 112 and the third movable space 113 can cooperate with the elastic terminal 4 to provide the first socket 2 and the second socket 3 with a displacement amount for lateral movement (left and right movement), so that the circuit carriers 5 and 6 can be firmly plugged into the first socket 2 and the second socket 3, respectively, and achieve better electrical characteristics during use.

[0073] In addition, when the first socket 2 and the second socket 3 move longitudinally in the first movable space 111, the inner top wall 114 and the inner bottom wall 115 on the inner side of the shell 1 corresponding to the first movable space 111 can serve as stops to limit the longitudinal movement of the first socket 2 and the second socket 3, so that the circuit carriers 5 and 6 can be firmly plugged into the first socket 2 and the second socket 3, respectively, to achieve better electrical characteristics during use.

[0074] In addition to the above embodiment, another embodiment of the present invention differs from the above embodiment in that the mounting portion 12 is provided with a plurality of slots 121, with one end of the elastic terminal 4 being respectively disposed in the slots 121. Thus, the slots 121, the first socket 2, and the second socket 3 cooperate to insulate the elastic terminal 4, thereby preventing the elastic terminal 4 from accidentally contacting and causing a short circuit.

[0075] In addition to the above embodiments, in one embodiment of the present invention, it is different from the above embodiments in that the first socket 2 includes a first socket portion 21, multiple first plug-in portions 22, at least two first buckle bodies 23, a first limiting portion 24 and a second limiting portion 25, the first socket portion 21 is arranged at one end of the first socket 2, the first plug-in portions 22 are respectively arranged at the other end of the first socket 2 and are connected to the first socket portion 21, the first buckle bodies 23 are respectively arranged on the inner side of the first socket portion 21, the first limiting portion 24 is arranged on one side of the first socket 2, the second limiting portion 25 is arranged on the other side of the first socket 2, and the first limiting portion 24 is located in the second active space 112 of the movable portion 11, the second limiting portion 25 is located in the third active space 113 of the movable portion 11, and one side of the elastic terminal 4 is respectively arranged at the first plug-in portion 22 and extends to the first socket portion 21.

[0076] Based on the above embodiment, when in use, the circuit carrier 5 can be plugged into the first socket portion 21, and the circuit contact 51 of the circuit carrier 5 is electrically connected to one side of the elastic terminal 4, and at the same time, the first buckle body 23 is buckled into the buckle hole 52 of the circuit carrier 5, so that the circuit carrier 5 is firmly plugged into the first socket 2; and when vibration is generated due to the external environment, the first socket 2 can cooperate with the elastic terminal 4 to move longitudinally in the first movable space 111; and the first movable The movable space 111, the second movable space 112, and the third movable space 113 cooperate with the elastic terminal 4 to provide the first socket 2 with lateral movement. During the lateral movement, the first socket 2 uses the first limiting portion 24 and the second limiting portion 25 on both sides to respectively cooperate with the second movable space 112 and the third movable space 113 to limit the lateral movement of the first socket 2, so that the circuit carrier 5 can be firmly plugged into the first socket 2 and achieve better electrical characteristics during use.

[0077] In addition, when the first socket 2 moves laterally, the two inner side walls 116 and 117 corresponding to the second active space 112 and the third active space 113 on the inner side of the shell 1 can serve as stops for the first limiting portion 24 and the second limiting portion 25, respectively, to limit the lateral movement of the first socket 2, so that the circuit carrier 5 can be firmly plugged into the first socket 2 and achieve better electrical characteristics during use.

[0078] In addition to the above embodiments, in one embodiment of the present invention, it is different from the above embodiments in that the second socket 3 includes a second socket portion 31, multiple second plug-in portions 32, at least two second buckle bodies 33, a third limiting portion 34 and a fourth limiting portion 35, the second socket portion 31 is arranged at one end of the second socket 3, the second plug-in portions 32 are respectively arranged at the other end of the second socket 3 and connected to the second socket portion 31, the second buckle bodies 33 are respectively arranged on the inner side of the second socket portion 31, the third limiting portion 34 is arranged on one side of the second socket 3, the fourth limiting portion 35 is arranged on the other side of the second socket 3, and the third limiting portion 34 is located in the second active space 112 of the movable portion, the fourth limiting portion 35 is located in the third active space 113 of the movable portion, and the other side of the elastic terminal 4 is respectively arranged at the second plug-in portions 32 and extends to the second socket portion 31.

[0079] Based on the above embodiment, when in use, the circuit carrier 6 can be plugged into the second socket portion 31, and the circuit contact 61 of the circuit carrier 6 is electrically connected to the other side of the elastic terminal 4, and at the same time, the second buckle body 33 is buckled into the buckle hole 62 of the circuit carrier 6, so that the circuit carrier 6 is firmly plugged into the second socket 3; and when vibration is generated due to the external environment, the second socket 3 can cooperate with the elastic terminal 4 to move longitudinally in the first activity space 111; and the first The movable space 111, the second movable space 112, and the third movable space 113 cooperate with the elastic terminal 4 to provide the second socket 3 with lateral movement. During the lateral movement, the second socket 3 uses the third limiting portion 34 and the fourth limiting portion 35 on both sides to respectively cooperate with the second movable space 112 and the third movable space 113 to limit the lateral movement of the second socket 3, so that the circuit carrier 6 can be firmly plugged into the second socket 3 and achieve better electrical characteristics during use.

[0080] In addition, when the second socket 3 moves laterally, the two inner side walls 116 and 117 corresponding to the second active space 112 and the third active space 113 on the inner side of the housing 1 can serve as stops for the third limiting portion 34 and the fourth limiting portion 35, respectively, to limit the lateral movement of the second socket 3, so that the circuit carrier 6 can be firmly plugged into the second socket 3 and achieve better electrical characteristics during use.

[0081] In addition to the above embodiment, in one embodiment of the present invention, it is different from the above embodiment in that the elastic terminal 4 includes an elastic portion 41, a first connecting portion 42, a second connecting portion 43, a first transmission portion 44, a second transmission portion 45, a first abutting portion 46 and a second abutting portion 47, the first connecting portion 42 and the second connecting portion 43 are connected to the top of the elastic portion 41, the first transmission portion 44 and the first abutting portion 46 are correspondingly arranged on one side of the first connecting portion 42, the second transmission portion 45 and the second abutting portion 47 are correspondingly arranged on one side of the second connecting portion 43, the elastic portion 41 is located on the outside of the bottom of the first socket 2 and the second socket 3, and the elastic portion 41 is arranged in the slot 121 of the setting portion 12, the first transmission portion 44 and the first abutting portion 46 are correspondingly arranged on the inner side of the first socket 2, and the second transmission portion 45 and the second abutting portion 47 are correspondingly arranged on the inner side of the second socket 3.

[0082] Based on the above embodiment, when in use, the circuit carrier 5 can be correspondingly plugged into the first socket portion 21, and the circuit contacts 51 on one surface of the circuit carrier 5 are respectively electrically connected to the first transmission portion 44 on one side of the elastic terminal 4, and the first abutting portion 46 is respectively abutted against the other surface of the circuit carrier 5 (where there is no circuit contact), so that the first transmission portion 44 cooperates with the first abutting portion 46 to be clamped between the two surfaces of the circuit carrier 5, and at the same time, the first buckle body 23 is buckled into the buckle hole 52 of the circuit carrier 5, so that the circuit carrier 5 is firmly plugged into the first socket 2 and the elastic terminal 4; and when vibration is generated due to the external environment , the first socket 2 can cooperate with the reciprocating elasticity of the elastic portion 41 to move longitudinally in the first movable space 111; and the first movable space 111, the second movable space 112 and the third movable space 113 cooperate with the elastic terminal 4 to provide the first socket 2 with lateral movement, and when moving horizontally, the first socket 2 uses the first limiting portion 24 and the second limiting portion 25 on both sides to cooperate with the second movable space 112 and the third movable space 113 respectively to limit the lateral movement of the first socket 2, so that the circuit carrier 5 can be firmly plugged into the first socket 2 and achieve better electrical characteristics when in use.

[0083] In addition, based on the above embodiment, when in use, the circuit carrier 6 can be correspondingly plugged into the second socket portion 31, and the circuit contacts 61 on one surface of the circuit carrier 6 are respectively electrically connected to the second transmission portion 45 on the other side of the elastic terminal 4, and the second abutting top portion 47 is respectively abutted against the other surface of the circuit carrier 6 (where there is no circuit contact), so that the second transmission portion 45 cooperates with the second abutting top portion 47 to be clamped on the two surfaces of the circuit carrier 6, and at the same time, the second buckle body 33 is buckled into the buckle hole 62 of the circuit carrier 6, so that the circuit carrier 6 is firmly plugged into the second socket 3 and the elastic terminal 4; and when vibration occurs due to the external environment When the first socket 2 moves, the first socket 2 can cooperate with the reciprocating elasticity of the elastic portion 41 to move longitudinally in the first active space 111; and the first active space 111, the second active space 112 and the third active space 113 cooperate with the elastic terminal 4 to provide the second socket 3 with lateral movement. When moving horizontally, the second socket 3 uses the third limiting portion 34 and the fourth limiting portion 35 on both sides to cooperate with the second active space 112 and the third active space 113 respectively to limit the lateral movement of the second socket 3, so that the circuit carrier 6 can be firmly plugged into the second socket 3, and achieve better electrical characteristics when in use.

[0084] In addition to the above-described embodiment, one embodiment of the present invention differs from the above-described embodiment in that the elastic terminal 4 further includes two first interference portions 48 and two second interference portions 49. The first interference portion 48 is located on one side of the first connecting portion 42, and the second interference portion 49 is located on one side of the second connecting portion 43. The first interference portions 48 are respectively coupled to the inner side of the first socket 2, and the second interference portions 49 are respectively coupled to the inner side of the second socket 3. In this manner, the first interference portions 48 and the second interference portions 49 ensure that the elastic terminal 4 is securely coupled to the first socket 2 and the second socket 3, respectively, thereby achieving better electrical characteristics when the circuit carriers 5 and 6 are plugged into the first socket 2 and the second socket 3.

[0085] The present invention has been described above with reference to preferred embodiments. However, those skilled in the art will appreciate that these embodiments are intended only to illustrate the present invention and should not be construed as limiting its scope. It should be noted that any equivalent variations and substitutions to these embodiments are intended to fall within the scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A connector structure, characterized in that: Includes: A housing including a movable portion and a setting portion, wherein the movable portion is disposed within the housing, the movable portion communicates with both ends of the housing and extends to both sides of the housing, and the setting portion communicates with the movable portion and is located at the inner bottom of the housing; a first socket, which is provided on the movable portion; a second socket disposed on the movable portion and facing away from the first socket; and A plurality of elastic terminals have one end arranged on the setting portion, one side of the elastic terminal is arranged on the first plug socket, and the other side of the elastic terminal is arranged on the second plug socket.

2. The connector structure according to claim 1, wherein: The movable part is provided with a first movable space, a second movable space and a third movable space. The first movable space is provided in the shell and connected to both ends of the shell. The second movable space is provided in the shell and connected to one side of the first movable space. The third movable space is provided in the shell and connected to the other side of the first movable space. The setting part is connected to the first movable space.

3. The connector structure according to claim 2, wherein: The first socket and the second socket are arranged in the first activity space, one side of the first socket and one side of the second socket are arranged in the second activity space, and the other side of the first socket and the other side of the second socket are arranged in the third activity space.

4. The connector structure according to claim 1, wherein: The setting portion is provided with a plurality of slots, and one end of the elastic terminal is respectively arranged in the slots.

5. The connector structure according to claim 1, wherein: The first socket includes a first socket portion, multiple first plug-in portions, at least two first buckle bodies, a first limiting portion and a second limiting portion. The first socket portion is arranged at one end of the first socket, the first plug-in portions are respectively arranged at the other end of the first socket and are connected to the first socket portion, the first buckle bodies are respectively arranged on the inner side of the first socket portion, the first limiting portion is arranged on one side of the first socket, the second limiting portion is arranged on the other side of the first socket, and the first limiting portion is located on one side of the movable portion, the second limiting portion is located on the other side of the movable portion, and one side of the elastic terminal is respectively arranged on the first plug-in portion and extends to the first socket portion.

6. The connector structure according to claim 1, wherein: The second socket includes a second socket portion, multiple second plug-in portions, at least two second buckle bodies, a third limiting portion and a fourth limiting portion. The second socket portion is arranged at one end of the second socket, the second plug-in portions are respectively arranged at the other end of the second socket and connected to the second socket portion, the second buckle bodies are respectively arranged on the inner side of the second socket portion, the third limiting portion is arranged on one side of the second socket, the fourth limiting portion is arranged on the other side of the second socket, and the third limiting portion is located on one side of the movable portion, the fourth limiting portion is located on the other side of the movable portion, and the other side of the elastic terminal is respectively arranged on the second plug-in portion and extends to the second socket portion.

7. The connector structure according to claim 1, wherein: The elastic terminals respectively include an elastic portion, a first connecting portion, a second connecting portion, a first transmission portion, a second transmission portion, a first abutting top portion and a second abutting top portion. The first connecting portion and the second connecting portion are connected to the top end of the elastic portion. The first transmission portion and the first abutting top portion are correspondingly arranged on one side of the first connecting portion, and the second transmission portion and the second abutting top portion are correspondingly arranged on one side of the second connecting portion. The elastic portion is located on the outside of the bottom of the first socket and the second socket, and the elastic portion is arranged on the setting portion. The first transmission portion and the first abutting top portion are correspondingly arranged on the inner side of the first socket, and the second transmission portion and the second abutting top portion are correspondingly arranged on the inner side of the second socket.

8. The connector structure according to claim 7, wherein: The elastic terminal further includes two first interference portions and two second interference portions, wherein the first interference portion is arranged on one side of the first connecting portion, and the second interference portion is arranged on one side of the second connecting portion. The first interference portions are respectively combined with the inner side of the first socket, and the second interference portions are respectively combined with the inner side of the second socket.

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