Electric connector

Abstract

The utility model discloses an electric connector comprising an insulation body, a first terminal group and a first heat radiation member, the first terminal group is at least partially arranged on the insulation body, the first terminal group comprises a first terminal and a second terminal, the first terminal comprises a first base part and a plurality of first elastic arms connected with the first base part, and the second terminal comprises a second base part and a plurality of second elastic arms connected with the second base part. The second terminal comprises a second base part and a plurality of second elastic arms connected with the second base part, and a first space is formed between the first base part and the second base part along the first direction; the first heat dissipation piece is at least partially arranged in the first space. According to the utility model, the first heat dissipation piece is arranged between the first base part of the first terminal and the second base part of the second terminal, so that heat generated by the first terminal and the second terminal can be dissipated to the external environment, and the heating condition of the terminals is improved.

Description

Technical Field

[0001] This utility model relates to an electrical connector, and more particularly to an electrical connector that can effectively improve terminal heating. Background Technology

[0002] In related technologies, the terminals of electrical connectors are usually formed by one or more contact arms from the front end of the metal plate. The cable is soldered to the metal plate. When the electrical connector transmits current, its metal plate is prone to heat generation due to current resistance, which leads to excessively high temperature in the contact area. Utility Model Content

[0003] The purpose of this invention is to provide an electrical connector that can improve the heat dissipation of the terminals.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An electrical connector, comprising:

[0006] Insulating body;

[0007] A first terminal group, at least partially disposed on the insulating body, includes a first terminal and a second terminal. The first terminal includes a first base and a plurality of first spring arms connected to the first base. The second terminal includes a second base and a plurality of second spring arms connected to the second base. A first space exists between the first base and the second base along a first direction.

[0008] A first heat sink is provided, at least partially in the first space.

[0009] As a further improvement of the present invention, the first heat sink is made of metal and includes two first heat sinks and a first mounting part connecting the two first heat sinks. The first mounting part is located in the first space and the first heat sinks are located outside the first space.

[0010] As a further improvement of this utility model, the dimension of the first mounting part along the second direction is larger than the dimension of the first heat dissipation part, and the second direction is perpendicular to the first direction.

[0011] As a further improvement of the present invention, the first heat dissipation part includes a first extension connected to the first mounting part, a plurality of first heat dissipation blocks and a plurality of second heat dissipation blocks arranged at intervals, the first heat dissipation blocks and the second heat dissipation blocks being connected to both sides of the thickness direction of the first extension part, and the first heat dissipation blocks and the second heat dissipation blocks being staggered.

[0012] As a further improvement of the present invention, the first base includes a first holding part connected to the first elastic arm and a first welding part connected to the first holding part, the second base includes a second holding part connected to the second elastic arm and a second welding part connected to the second holding part, the first welding part and the second welding part have the first space between the first welding part and the second welding part along the first direction, and the side of the first welding part facing away from the first heat sink and the side of the second welding part facing away from the first heat sink are both configured as connecting cables.

[0013] As a further improvement of the present invention, the first welding portion bends and extends from the first holding portion in a direction away from the second welding portion, and / or the second welding portion bends and extends from the second holding portion in a direction away from the first welding portion.

[0014] As a further improvement of the present invention, the first retaining part and the second retaining part are connected by a fastener, which is a press-fit stud.

[0015] As a further improvement of this utility model, both the first retaining part and the second retaining part are located inside the first receiving cavity of the insulating body, while the first welding part and the second welding part are located outside the first receiving cavity.

[0016] The first holding part is provided with a first recess, the second holding part is provided with a second recess, the first side wall of the insulating body is provided with a through hole, a limiting member is provided in the through hole, and the limiting member extends into the first recess and the second recess.

[0017] As a further improvement of the present invention, a plurality of first spring arms and a plurality of second spring arms are arranged in a row, and the first spring arms and the second spring arms are alternately and cyclically arranged along a third direction. The first spring arm includes a first contact portion, the second spring arm includes a second contact portion, and the plurality of first contact portions and the plurality of second contact portions are staggered along a second direction.

[0018] As a further improvement to this utility model, the electrical connector includes a first grounding component and a second grounding component. The first grounding component includes a first housing portion and two second housing portions perpendicularly connected to both ends of the first housing portion. The first housing portion is provided with a first retaining strip, and the end of each second housing portion away from the first housing portion is provided with a second retaining strip. The second grounding component includes a third housing portion and two fourth housing portions perpendicularly connected to both ends of the third housing portion. The third housing portion is provided with a third retaining strip, and the end of each fourth housing portion away from the third housing portion is provided with a fourth retaining strip.

[0019] The insulating body is provided with a base, and the base is provided with a first slot for the first card strip to be inserted, a second slot for the second card strip to be inserted, a third slot for the third card strip to be inserted, and a fourth slot for the fourth card strip to be inserted.

[0020] Compared with the prior art, the beneficial effect of this utility model is that by providing a first heat dissipation component between the first base of the first terminal and the second base of the second terminal, the heat generated by the first terminal and the second terminal can be dissipated to the external environment, thereby improving the terminal heating situation. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the electrical connector of this utility model;

[0022] Figure 2 yes Figure 1 An exploded view of the electrical connector shown.

[0023] Figure 3 yes Figure 2 A schematic diagram of the exploded structure of the middle part;

[0024] Figure 4 yes Figure 1 A three-dimensional schematic diagram of the electrical connector shown from another angle;

[0025] Figure 5 yes Figure 4 An exploded view of the electrical connector shown.

[0026] Figure 6 yes Figure 3 A three-dimensional schematic diagram of the middle section structure;

[0027] Figure 7 yes Figure 6 Side view;

[0028] Figure 8 yes Figure 7 Enlarged view of region A in the middle;

[0029] Figure 9 yes Figure 3 A three-dimensional schematic diagram of the first heat sink component. Detailed Implementation

[0030] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. If several embodiments exist, features in these embodiments may be combined with each other without conflict. When the description refers to the drawings, unless otherwise stated, the same numbers in different drawings represent the same or similar elements. The descriptions in the following exemplary embodiments do not represent all embodiments consistent with the present invention; rather, they are merely examples of apparatuses, products, and / or methods consistent with some aspects of the present invention as set forth in the claims.

[0031] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of protection of this invention. The singular forms “a,” “the,” or “the” used in the specification and claims of this invention are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0032] It should be understood that the terms "first," "second," and similar words used in the specification and claims of this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish the features. Similarly, the terms "an" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one. Unless otherwise stated, the terms "before," "after," "upper," "lower," and similar words appearing in this utility model are for ease of explanation only and are not limited to a specific location or spatial orientation. The terms "comprising" or "including" are an open-ended expression, meaning that the element preceding "comprising" or "including" covers the element following "comprising" or "including" and its equivalents, which does not exclude that the element preceding "comprising" or "including" may also include other elements. In this utility model, the word "several" means two or more.

[0033] Please refer to Figures 1 to 9 As shown, this utility model discloses an electrical connector, including an insulating body 1, a first terminal group 2, a second terminal group 3, a first heat sink 4, and a second heat sink 5. The second terminal group 3 is arranged at intervals from the first terminal group 2 along a first direction A1-A1 (the vertical direction of the electrical connector). At least a portion of the first terminal group 2 and at least a portion of the second terminal group 3 are disposed on the insulating body 1. The first heat sink 4 is used for heat dissipation of the first terminal group 2, and the second heat sink 5 is used for heat dissipation of the second terminal group 3.

[0034] See Figure 5The insulating body 1 includes a body portion, two mating portions 15 connected to one end of the body portion, an outer plate 16 connected to the other end of the body portion, and a seat 17 connected to the outer periphery of the body portion. The body portion includes a first wall portion 11, a second wall portion 12 opposite to the first wall portion 11, a first side wall portion 13 connecting one side of the first wall portion 11 and one side of the second wall portion 12, and a second side wall portion 14 connecting the other side of the first wall portion 11 and the other side of the second wall portion 12. The first wall portion 11, the second wall portion 12, the first side wall portion 13, and the second side wall portion 14 form a storage cavity. An inner plate 18 is provided in the storage cavity. The two sides of the inner plate 18 are respectively connected to the first side wall portion 13 and the second side wall portion 14. One end of the inner plate 18 is connected to the outer plate 16. The inner plate 18 divides the storage cavity into a first storage cavity 101 and a second storage cavity 102. A first terminal group 2 is at least partially disposed in the first storage cavity 101, and a second terminal group 3 is at least partially disposed in the second storage cavity 102.

[0035] See Figure 5 Each of the first and second storage cavities 101 and 102 is provided with a partition plate 19, which divides each of the first and second storage cavities 101 and 102 into two sub-cavities. The space between the two docking parts 15 forms a slot 103, which is used to accommodate at least part of the docking module. At the same time, at least part of the first terminal group 2 and at least part of the second terminal group 3 are disposed in the slot 103.

[0036] See Figure 2 and Figure 3 The first terminal group 2 includes a first terminal 21, a second terminal 22, and a fifth terminal 23. The first terminal 21 and the second terminal 22 are both conductive terminals, and the fifth terminal 23 is a signal terminal. The first terminal 21 includes a first base 211 and a plurality of first spring arms 212 connected to the first base 211. The second terminal 22 includes a second base 221 and a plurality of second spring arms 222 connected to the second base 221. A first space 200 is formed between the first base 211 and the second base 221 along a first direction A1-A1. The first heat sink 4 is at least partially disposed in the first space 200. In this way, the heat generated by the first base 211 and the second base 221 can be dissipated to the external environment, thereby improving the terminal heating situation.

[0037] For details, see Figure 3The first base 211 includes a first holding portion 2111 connected to the first spring arm 212 and a first welding portion 2112 connected to the first holding portion 2111. The second base 221 includes a second holding portion 2211 connected to the second spring arm 222 and a second welding portion 2212 connected to the second holding portion 2211. The first holding portion 2111 and the second holding portion 2211 are both located in one sub-cavity of the first receiving cavity 101. The fifth terminal 23 is at least partially located in the other sub-cavity of the first receiving cavity 101. The first welding portion 2112 and the second welding portion 2212 are located outside the first receiving cavity 101. A first space 200 is provided between the first welding part 2112 and the second welding part 2212 along the first direction A1-A1. Both the side of the first welding part 2112 facing away from the first heat sink 4 and the side of the second welding part 2212 facing away from the first heat sink 4 are configured as connecting cables. Two first welding parts 401 of the cables are welded to the first welding part 2112 and the second welding part 2212 respectively. The first welding part 2112, the first heat sink 4, and the second welding part 2212 are located between the two first welding parts 401. By providing the first heat sink 4 between the first welding part 2112 and the second welding part 2212, the heat generated by the first welding part 2112 and the second welding part 2212 can be dissipated to the external environment, improving the heating situation in the welding area.

[0038] See Figure 3 The first retaining part 2111 and the second retaining part 2211 are connected by a fastener 6, which is a press-fit stud, providing a good fastening effect and effectively preventing relative movement between the first retaining part 2111 and the second retaining part 2211.

[0039] See Figure 5 The first holding part 2111 is provided with a first recess 2110, and the second holding part 2211 is provided with a second recess 2210. The first side wall part 13 of the insulating body 1 is provided with a through hole 130. A limiting member 7 is provided in the through hole 130. The limiting member 7 extends into the first recess 2110 and the second recess 2210. In this way, the first terminal 21 and the second terminal 22 can be limited to prevent the first terminal 21 and the second terminal 22 from moving relative to the insulating body 1 in the front-back direction.

[0040] The first weld portion 2112 bends and extends from the first retaining portion 2111 in a direction away from the second weld portion 2212, and / or the second weld portion 2212 bends and extends from the second retaining portion 2211 in a direction away from the first weld portion 2112. In this embodiment, see... Figure 7 The first welding part 2112 bends and extends from the first holding part 2111 in a direction away from the second welding part 2212, and the second welding part 2212 has a flat plate structure.

[0041] In another embodiment, the second welding portion 2212 bends and extends from the second holding portion 2211 in a direction away from the first welding portion 2112, and the first welding portion 2112 has a flat plate structure. In yet another embodiment, the first welding portion 2112 bends and extends from the first holding portion 2111 in a direction away from the second welding portion 2212, and the second welding portion 2212 bends and extends from the second holding portion 2211 in a direction away from the first welding portion 2112.

[0042] See Figures 6 to 8 Multiple first spring arms 212 and multiple second spring arms 222 are arranged in a row, and the first spring arms 212 and the second spring arms 222 are alternately arranged in a third direction A3-A3 (the left-right direction of the electrical connector). The first spring arm 212 includes a first contact portion 2121, and the second spring arm 222 includes a second contact portion 2221. The multiple first contact portions 2121 and the multiple second contact portions 2221 are staggered in a second direction A2-A2 (the front-back direction of the electrical connector). In this way, when the mating module is inserted, the first contact portions 2121 and the second contact portions 2221, which are staggered in the front-back direction, can contact the mating module successively to achieve multi-level and multi-contact point contact, making the contact more sufficient, enhancing the stability of its electrical connection and the stability of current transmission, and at the same time making the insertion and extraction force between the mating module more uniform and reducing the heat generation of the contact surface.

[0043] The first heat sink 4 is made of metal. See Figure 3 The first heat sink 4 includes two first heat sink sections 41 and a first mounting section 42 connecting the two first heat sink sections 41. The first mounting section 42 is located inside the first space 200, and the first heat sink sections 41 are located outside the first space 200. The first mounting section 42 dissipates heat to the external environment through the first heat sink sections 41. The dimension of the first mounting section 42 along the second direction A2-A2 is larger than the dimension of the first heat sink section 41. The second direction A2-A2 is perpendicular to the first direction A1-A1. The formation of clearance space at both ends of the connection between the first heat sink section 41 and the first mounting section 42 facilitates heat dissipation.

[0044] See Figure 9 The first heat dissipation part 41 includes a first extension part 411 connected to the first mounting part 42, a plurality of first heat dissipation blocks 412 spaced apart, and a plurality of second heat dissipation blocks 413 spaced apart. The first heat dissipation blocks 412 and the second heat dissipation blocks 413 are connected to both sides of the first extension part 411 in the thickness direction, and the first heat dissipation blocks 412 and the second heat dissipation blocks 413 are staggered to improve the heat dissipation effect.

[0045] See Figure 2 and Figure 3The second terminal group 3 includes a third terminal 31, a fourth terminal 32, and a sixth terminal 33. The third terminal 31 and the fourth terminal 32 are both conductive terminals, and the sixth terminal 33 is a signal terminal. The third terminal 31 includes a third base 311 and a plurality of third spring arms 312 connected to the third base 311. The fourth terminal 32 includes a fourth base 321 and a plurality of fourth spring arms 322 connected to the fourth base 321. The third base 311 and the fourth base 321 have a second space 300 for accommodating the second heat sink 5 along the first direction A1-A1.

[0046] For details, see Figure 3 The third base 311 includes a third holding part 3111 connected to the third spring arm 312 and a third welding part 3112 connected to the third holding part 3111. The fourth base 321 includes a fourth holding part 3211 connected to the fourth spring arm 322 and a fourth welding part 3212 connected to the fourth holding part 3211. The third holding part 3111 and the fourth holding part 3211 are both located in one sub-cavity of the second receiving cavity 102. The sixth terminal 33 is at least partially located in another sub-cavity of the second receiving cavity 102. The third welding part 3112 and the fourth welding part 3212 are located outside the second receiving cavity 102. A second space 300 is provided between the third welding part 3112 and the fourth welding part 3212 along the first direction A1-A1. Both the side of the third welding part 3112 facing away from the second heat sink 5 and the side of the fourth welding part 3212 facing away from the second heat sink 5 are configured as connecting cables. Two second welding parts 402 of the cables are welded to the third welding part 3112 and the fourth welding part 3212 respectively. The third welding part 3112, the second heat sink 5, and the fourth welding part 3212 are located between the two second welding parts 402. By providing the second heat sink 5 between the third welding part 3112 and the fourth welding part 3212, the heat generated by the third welding part 3112 and the fourth welding part 3212 can be dissipated to the external environment, improving the heating situation in the welding area.

[0047] See Figure 3 The third retaining part 3111 and the fourth retaining part 3211 are connected by another fastener 6. The fastener 6 is a press-fit stud, which has a good fastening effect and effectively prevents relative movement between the third retaining part 3111 and the fourth retaining part 3211.

[0048] See Figure 5 The third holding part 3111 is provided with a third recess 3110, and the fourth holding part 3211 is provided with a fourth recess 3210. The limiting member 7 extends into the third recess 3110 and the fourth recess 3210 at the same time. In this way, the third terminal 31 and the fourth terminal 32 can be limited to prevent the third terminal 31 and the fourth terminal 32 from moving relative to the insulating body 1 in the front-back direction.

[0049] The third welding portion 3112 bends and extends from the third retaining portion 3111 in a direction away from the fourth welding portion 3212, and / or the fourth welding portion 3212 bends and extends from the fourth retaining portion 3211 in a direction away from the third welding portion 3112. In this embodiment, see... Figure 7 The third welding part 3112 bends and extends from the third holding part 3111 in a direction away from the fourth welding part 3212, and the fourth welding part 3212 is a flat plate structure.

[0050] In another embodiment, the fourth welding portion 3212 bends and extends from the fourth retaining portion 3211 in a direction away from the third welding portion 3112, and the third welding portion 3112 has a flat plate structure. In yet another embodiment, the third welding portion 3112 bends and extends from the third retaining portion 3111 in a direction away from the fourth welding portion 3212, and the fourth welding portion 3212 bends and extends from the fourth retaining portion 3211 in a direction away from the third welding portion 3112.

[0051] See Figures 6 to 8 Multiple third spring arms 312 and multiple fourth spring arms 322 are arranged in a row, and the third spring arms 312 and fourth spring arms 322 are alternately arranged along a third direction A3-A3. The third spring arm 312 includes a third contact portion 3121, and the fourth spring arm 322 includes a fourth contact portion 3221. The multiple third contact portions 3121 and multiple fourth contact portions 3221 are staggered along a second direction A2-A2. In this way, when the docking module is inserted, the third contact portions 3121 and fourth contact portions 3221, which are staggered along the front-back direction, can contact the docking module successively to achieve multi-level and multi-contact point contact, making the contact more sufficient, enhancing the stability of its electrical connection and the stability of current transmission, while making the insertion and extraction force between the docking module more uniform and reducing the heat generation of the contact surface.

[0052] See Figure 2The electrical connector includes a first grounding component 81 and a second grounding component 82, which are connected to the upper and lower sides of the base 17. Specifically, the first grounding component 81 includes a first housing portion 811, two second housing portions 812 perpendicularly connected to both ends of the first housing portion 811, and a first grounding portion 813 connected to one side of the first housing portion 811. Along a third direction A3-A3, the first grounding portion 813 is located between the two second housing portions 812. A first retaining strip 8111 is provided on the side of the first housing portion 811 away from the first grounding portion 813, and a second retaining strip 8121 is provided on the end of the second housing portion 812 away from the first housing portion 811. The base 17 is provided with a first retaining groove 171 for the first retaining strip 8111 to be engaged and a second retaining groove 172 for the second retaining strip 8121 to be engaged, so as to realize the engagement of the first grounding component 81 with the base 17, which facilitates installation and disassembly. The second grounding component 82 includes a third housing portion 821, two fourth housing portions 822 perpendicularly connected to both ends of the third housing portion 821, and a second grounding portion 823 connected to one side of the third housing portion 821. Along a third direction A3-A3, the second grounding portion 823 is located between the two fourth housing portions 822. A third locking strip 8211 is provided on the side of the third housing portion 821 away from the second grounding portion 823, and a fourth locking strip 8221 is provided on the end of the fourth housing portion 822 away from the third housing portion 821. The base 17 is provided with a third locking groove 173 for the third locking strip 8211 to be inserted and a fourth locking groove 174 for the fourth locking strip 8221 to be inserted, thereby enabling the second grounding component 82 to be engaged with the base 17 for easy installation and disassembly.

[0053] See Figure 2 Each mating part 15 has a groove 104 and a side groove 105 on the side facing away from the slot 103. At least a portion of the first grounding part 813 and at least a portion of the second grounding part are respectively provided in the groove 104 to provide protection. Both sides of the first grounding part 813 and the second grounding part are provided with wings, which are provided in the side groove 105 to limit the first grounding member 81 and the second grounding member 82 and prevent warping.

[0054] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of the present utility model should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. An electrical connector, characterized by, The application relates to an insulating body (1), a first terminal group (2) arranged at least partially in the insulating body (1), the first terminal group (2) comprising a first terminal (21) and a second terminal (22), the first terminal (21) comprising a first base (211) and a plurality of first elastic arms (212) connected to the first base (211), the second terminal (22) comprising a second base (221) and a plurality of second elastic arms (222) connected to the second base (221), the first base (211) and the second base (221) having a first space (200) therebetween in a first direction, and a first heat dissipation member (4) arranged at least partially in the first space (200). The first heat dissipation member (4) is made of metal, and comprises two first heat dissipation portions (41) and a first mounting portion (42) connecting the two first heat dissipation portions (41), the first mounting portion (42) being located in the first space (200), and the first heat dissipation portions (41) being located outside the first space (200). The first mounting portion (42) has a dimension in a second direction greater than that of the first heat dissipation portions (41), and the second direction is perpendicular to the first direction. The first heat dissipation portions (41) comprise a first extension portion (411) connected to the first mounting portion (42), a plurality of first heat dissipation blocks (412) arranged at intervals, and a plurality of second heat dissipation blocks (413) arranged at intervals, the first heat dissipation blocks (412) and the second heat dissipation blocks (413) being connected to both sides of the first extension portion (411) in a thickness direction, and the first heat dissipation blocks (412) and the second heat dissipation blocks (413) being arranged in a staggered manner. The first base (211) comprises a first holding portion (2111) connected to the first elastic arms (212) and a first welding portion (2112) connected to the first holding portion (2111), the second base (221) comprises a second holding portion (2211) connected to the second elastic arms (222) and a second welding portion (2212) connected to the second holding portion (2211), the first welding portion (2112) and the second welding portion (2212) have the first space (200) therebetween in the first direction, and the side of the first welding portion (2112) away from the first heat dissipation member (4) and the side of the second welding portion (2212) away from the first heat dissipation member (4) are configured to be connected to cables.

2. The electrical connector of claim 1, wherein, The first welding portion (2112) is bent and extends away from the second welding portion (2212) from the first holding portion (2111), and / or the second welding portion (2212) is bent and extends away from the first welding portion (2112) from the second holding portion (2211).

3. The electrical connector of claim 2, wherein, The first holding portion (2111) and the second holding portion (2211) are connected by a fastener (6), and the fastener (6) is a press-in stud.

4. The electrical connector of claim 2, wherein, ​ 5. The electrical connector of claim 1, wherein, ​ 6. The electrical connector of claim 5, wherein, ​ 7. The electrical connector of claim 5, wherein, ​ 8. The electrical connector of claim 5, wherein, The first holding part (2111) and the second holding part (2211) are located in the first receiving cavity (101) of the insulating body (1), the first welding part (2112) and the second welding part (2212) are located outside the first receiving cavity (101), The first holding part (2111) is provided with a first notch (2110), the second holding part (2211) is provided with a second notch (2210), the first side wall part (13) of the insulating body (1) is provided with a through hole (130), the through hole (130) is provided with a limiting piece (7), and the limiting piece (7) extends into the first notch (2110) and the second notch (2210).

9. The electrical connector of claim 1, wherein, A plurality of the first elastic arms (212) and the second elastic arms (222) are arranged in a row, and the first elastic arms (212) and the second elastic arms (222) are arranged alternately along a third direction, the first elastic arms (212) comprise a first contact part (2121), the second elastic arms (222) comprise a second contact part (2221), and a plurality of the first contact parts (2121) and the second contact parts (2221) are arranged staggered along a second direction.

10. The electrical connector of claim 1, wherein, The electric connector comprises a first grounding piece (81) and a second grounding piece (82), the first grounding piece (81) comprises a first shell part (811), two second shell parts (812) connected perpendicularly at both ends of the first shell part (811), the first shell part (811) is provided with a first clamping strip (8111), and the second shell part (812) is provided with a second clamping strip (8121) at one end away from the first shell part (811), the second grounding piece (82) comprises a third shell part (821), two fourth shell parts (822) connected perpendicularly at both ends of the third shell part (821), the third shell part (821) is provided with a third clamping strip (8211), and the fourth shell part (822) is provided with a fourth clamping strip (8221) at one end away from the third shell part (821), The insulating body (1) is provided with a seat body (17), the seat body (17) is provided with a first clamping groove (171) for clamping the first clamping strip (8111), a second clamping groove (172) for clamping the second clamping strip (8121), a third clamping groove (173) for clamping the third clamping strip (8211), and a fourth clamping groove (174) for clamping the fourth clamping strip (8221).

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