CN113193439B

CN113193439B - A kind of interface unit

Info

Publication number: CN113193439B
Application number: CN202110467014.4A
Authority: CN
Inventors: 王超; 刘兴平; 胡豪
Original assignee: Sichuan Huafeng Technology Co Ltd
Current assignee: Sichuan Huafeng Technology Co Ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2023-01-13
Anticipated expiration: 2041-04-28
Also published as: CN113193439A

Abstract

The invention relates to the technical field of connectors, and discloses a connector, which comprises: the signal transmission assembly comprises a terminal assembly, a lead and a shielding piece, wherein the terminal assembly comprises a plurality of conductive terminals arranged at intervals, the conductive terminals comprise fixing parts and connecting parts, the lead is connected with the connecting parts, the shielding piece comprises shielding shells, and the shielding shells are arranged on the outer sides of the fixing parts, the connecting parts and one ends of the leads close to the connecting parts; the base is arranged on the rear side of the fixing part, a plurality of limiting lugs are arranged on the base at intervals, the limiting lugs are attached to the inner surface of the shielding shell, and the wire is positioned in a limiting groove formed by two adjacent limiting lugs; the signal transmission assembly and the base are arranged in the shell; and the glue filling block is arranged in the shell and is positioned between the inner walls of the base and the shell and between the inner walls of the shielding shell and the shell, and the wire part is embedded in the glue filling block.

Description

A kind of interface unit

Technical Field

The invention relates to the technical field of connectors, in particular to a connector.

Background

The high-speed connector is a connector product with strong transmission capability in all connector product types at present, and is applied to various industries.

The existing mini high-speed connector comprises two module assemblies, conductive terminals of the two module assemblies are arranged side by side in the front and at the back, and the two module assemblies are stacked up and down and arranged in a staggered mode. The module assembly comprises the shielding piece and the terminal assembly, and glue easily enters between the shielding piece and the terminal assembly in the glue filling process, so that the shielding effect of the shielding piece is influenced, and further the signal transmission quality is influenced.

Therefore, a connector is needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a connector which can ensure that glue can enter a conductive terminal and ensure the signal transmission performance of the conductive terminal.

In order to achieve the purpose, the invention adopts the following technical scheme:

provided is a connector including:

the signal transmission assembly comprises a terminal assembly, a lead and a shielding piece, wherein the terminal assembly comprises a plurality of conductive terminals arranged at intervals, the conductive terminals comprise fixing parts and connecting parts, the lead is connected to the connecting parts, the shielding piece comprises shielding shells, and the shielding shells are arranged on the outer sides of the fixing parts, the connecting parts and one ends of the leads close to the connecting parts;

the base is arranged on the rear side of the fixing part, a plurality of limiting lugs are arranged on the base at intervals, the limiting lugs are attached to the inner surface of the shielding shell, and the wire is positioned in a limiting groove formed by two adjacent limiting lugs;

a housing, the signal transmission assembly and the base both disposed within the housing;

and the glue filling block is arranged in the shell and is positioned between the base and the inner wall of the shell and between the shielding shell and the inner wall of the shell, and the wire part is embedded in the glue filling block.

As a preferred technical solution of the connector, the signal transmission assembly further includes a first insulating block, the fixing portion is embedded in the first insulating block, the first insulating block is located in the shielding member, the conductive terminal further includes a contact portion, the connecting portion and the contact portion are respectively located on two sides of the first insulating block, and the contact portion is exposed from the housing.

As a preferable technical solution of the connector, the shield further includes a plurality of shield terminals extending from the shield shell, the shield terminals and the contact portions are arranged side by side, and one or two of the contact portions are arranged between two adjacent shield terminals.

As a preferred technical solution of the connector, a first connection post is disposed on a front side of the first insulation block, a first connection hole is disposed on the shield, and the first connection post penetrates through the first connection hole.

As a preferred technical scheme of connector, signal transmission subassembly with the base is two, two set up side by side around the signal transmission subassembly, the place ahead the base laminating in the back signal transmission subassembly's shielding shell.

As a preferred technical scheme of a connector, the base in the place ahead both sides all are provided with the second connecting hole around, and the base the place ahead of rear is provided with the second connecting hole, the first spliced pole of first insulation piece rear side insert in the second connecting hole of base the place ahead, the rear the first spliced pole of first insulation piece front side insert in the place ahead the base rear side in the second connecting hole.

As a preferred technical scheme of the connector, the inner walls of the left side and the right side of the shell are provided with connecting grooves, the left side and the right side of the first insulating block and the base are provided with connecting bulges matched with the connecting grooves, and the connecting bulges extend into the connecting grooves;

the both sides of the base in rear are provided with spacing arch, be provided with on the shell with spacing arch matched with spacing groove.

As a preferred technical solution of the connector, the conducting wire is a differential signal wire, and two conducting terminals are arranged between two adjacent shielding terminals;

two conductive terminals between two adjacent shielding terminals correspond to one differential signal line, two signal lines of the differential signal line are respectively connected to the connecting parts of the two conductive terminals, and the ground wire of the differential signal line is connected to the shielding shell.

As a preferable technical solution of the connector, the signal transmission assembly further includes an insulating spacer disposed between the connecting portion and the shield shell.

As a preferred technical scheme of the connector, a fixing hole is formed in the shielding piece, a fixing column is arranged on the insulating isolation block, and the fixing column is inserted into the fixing hole.

The invention has the beneficial effects that:

the spacing lug can block and block a gap between the shielding shell and the base, and due to the spacing lug, glue liquid can be prevented from entering between the shielding piece and the conductive terminal in the glue pouring process, so that the signal transmission performance of the conductive terminal is ensured. Meanwhile, the wire part is embedded in the glue filling block, so that the wire can be fixed, the wire is prevented from being pulled to separate from the conductive terminal, the strength of the connector can be improved, and the service life of the connector is prolonged.

Moreover, an insulating isolation block is arranged between the shielding shell and the connecting part, and supports the shielding piece, so that short circuit caused by collapse of the shielding piece is avoided; the insulating isolation block isolates the conductive terminals from the shielding shell, so that the shielding shell is prevented from being short-circuited with the conductive terminals in the assembling or using process, and the normal use of the connector is ensured.

The two signal transmission assemblies are arranged side by side in front and at the back and are connected, so that the two signal transmission assemblies have the same structure, and are processed by using the same mould, so that the production cost of the connector is reduced; two signal transmission assembly sets up side by side around, rather than range upon range of setting up from top to bottom, can reduce the height of connector, and under the limited condition of space height, this connector can install and use to satisfy the signal transmission demand.

The rear end of the shielding shell is provided with a V-shaped lead-in groove, and the grounding wire of the wire is led to the bottom of the lead-in groove and is welded on the shielding piece after being bent; the opening of the lead-in groove is large, so that the lead-in of the grounding wire is facilitated, the grounding wire can be led to a correct position for welding under the condition of small size, the accurate welding can be realized, and the welding efficiency is improved; the demand on the operator is low.

Drawings

FIG. 1 is a first schematic view of a connector according to the present invention;

FIG. 2 is a second schematic view of the connector according to the present invention;

FIG. 3 is a first partial schematic view of a connector according to the present invention;

FIG. 4 is a second partial schematic view of the connector of the present invention;

FIG. 5 is a schematic structural view of a signal transmission assembly and a first base provided by the present invention;

FIG. 6 is a schematic structural view of a signal transmission assembly and a second base provided by the present invention;

fig. 7 is a partial structural schematic view of a signal transmission assembly and a first base provided by the present invention;

FIG. 8 is a schematic structural view of a shield provided by the present invention;

fig. 9 is a first schematic structural view of a first insulating block and terminal assembly provided by the present invention;

fig. 10 is a second schematic structural view of a first insulating block and terminal assembly provided by the present invention;

fig. 11 is a schematic structural diagram of a first base provided by the present invention.

In the figure:

10. a signal transmission component; 101. a first insulating block; 1011. a first connecting post; 1012. a second connecting column; 1013. a supporting block;

102. a conductive terminal; 1021. a connecting portion; 1022. a fixed part; 1023. a contact portion;

103. a wire; 1031. a signal line (1031); 1032. a ground line;

104. a shield; 1041. a shield case; 10411. a lead-in groove; 10412. accommodating grooves; 10413. anti-drop holes; 10414. a fixing hole; 1042. a shield terminal;

105. an insulating spacer block; 1051. fixing a column;

20. a first base; 201. a limiting bump; 202. a connecting projection; 203. an avoidance groove; 204. a second connection hole;

30. a second base;

40. a housing; 401. a positioning column;

50. pouring a rubber block;

60. and a stop block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the product of the present invention is conventionally placed in use, and are only used for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

As shown in fig. 1 to fig. 11, the present embodiment discloses a connector, which includes two signal transmission assemblies 10, and the two signal transmission assemblies 10 are disposed in parallel and connected with each other.

The signal transmission assembly 10 includes a first insulation block 101, a terminal assembly, a conductive wire 103 and a shielding member 104, wherein the terminal assembly includes a plurality of conductive terminals 102 arranged at intervals, the conductive terminals 102 are partially embedded in the first insulation block 101, and the conductive terminals 102 respectively extend to a first side and a second side of the first insulation block 101 to form a contact portion 1023 and a connecting portion 1021. The signal lines (1031) of the wires 103 are connected to the connecting portions 1021 of the conductive terminals 102, and the wires 103 of the front signal transmission assembly 10 are located on the second side of the rear signal transmission assembly 10. The shield 104 includes a shield shell 1041 and a plurality of shield terminals 1042 extending from the shield shell 1041, the shield shell 1041 is located outside one end of the first insulating block 101, the connecting portion 1021 and the conducting wire 103 connected to the connecting portion 1021, the shield terminals 1042 and the contact portions 1023 are arranged side by side, and one or two contact portions 1023 are arranged between two adjacent shield terminals 1042. In this embodiment, two contact portions 1023 are disposed between two adjacent shielding terminals 1042, that is, two conductive terminals 102 are disposed between two adjacent shielding terminals 1042.

Specifically, the conductive terminal 102 includes a connecting portion 1021, a fixing portion 1022 and a contact portion 1023 connected in sequence, wherein the connecting portion 1021 and the fixing portion 1022 are arranged at an included angle, and the fixing portion 1022 and the contact portion 1023 are arranged at an included angle. The conductive line 103 is a differential signal line including two signal lines (1031) and one ground line 1032. Two conductive terminals 102 are disposed between two adjacent shielding terminals 1042, the two conductive terminals 102 correspond to a differential signal line, two signal lines (1031) of the differential signal line are respectively connected to the connecting portions 1021 of the two conductive terminals 102, and the ground line 1032 of the differential signal line is connected to the shielding case 1041. The signal wire (1031) is flattened and then soldered to the connection portion 1021, so that the contact area between the signal wire (1031) and the connection portion 1021 can be increased, and the soldering reliability can be increased.

A plurality of supporting blocks 1013 are disposed at intervals on the first insulating block 101, the supporting blocks 1013 are disposed corresponding to the shielding terminals 1042 and located at the first side of the first insulating block 101, and the supporting blocks 1013 are attached to the inner surface of the shielding shell 1041. The support blocks 1013 serve as supports to prevent the shield 104 from collapsing, and also to ensure the distance between the shield 104 and the conductive terminal 102 to prevent the shield 104 and the conductive terminal 102 from short-circuiting.

Preferably, the signal transmission assembly 10 further includes an insulating spacer 105 disposed between the shield case 1041 and the connecting part 1021. In this embodiment, the insulating isolation block 105 is fixed on the inner side of the shielding element 104, specifically, a fixing hole 10414 is provided on the shielding element 104, a fixing column 1051 is provided on the insulating isolation block 105, and the fixing column 1051 is inserted into the fixing hole 10414. The outer diameter of the end of the fixing hole 10414 close to the outer side of the shield 104 is larger than the outer diameter of the end close to the insulating spacer 105, so that the insulating spacer 105 is prevented from falling off from the shield 104. The insulating spacer 105 is formed on the shield 104 by injection molding and assembled with the shield 104. In other embodiments, the insulating spacer 105 may be fixed to the shielding shell 1041 by means of adhesion. The insulating spacer 105 isolates the shielding shell 1041 from the connecting portion 1021 of the conductive terminal 102, so as to prevent the shielding shell 1041 or the connecting portion 1021 from collapsing to cause short circuit.

In this embodiment, a V-shaped lead-in slot 10411 is formed at the rear end of the shielding shell 1041, an accommodating slot 10412 is formed in the outer shell 40 of the shielding shell 1041, and an anti-dropping hole 10413 is formed at one end of the accommodating slot 10412 close to the lead-in slot 10411. The ground wire 1032 is led into the bottom of the V-shaped lead-in slot 10411, bent and welded to the shielding element 104, and specifically, the ground wire 1032 is led into the anti-falling hole 10413 through the lead-in slot 10411, then bent, placed in the accommodating slot 10412, and then fixed to the shielding shell 1041 by welding, so as to achieve mechanical and electrical connection between the ground wire 1032 and the shielding shell 1041.

In other embodiments, the shielding housing 1041 is provided with positioning holes, and the ground wire 1032 is inserted into the positioning holes and then soldered onto the shielding housing 1041, so as to achieve mechanical and electrical connection between the ground wire 1032 and the shielding housing 1041.

The front side of the first insulating block 101 is provided with a first connection column 1011, the shield 104 is provided with a first connection hole, and the first connection column 1011 penetrates through the first connection hole. The root of the first connecting column 1011 is provided with a containing and cutting groove, so that the phenomenon that hanging plastic is accumulated to influence the matching flatness can be avoided. After the first connecting column 1011 is inserted into the first connecting hole, the fixing of the first connecting column 1011 and the first connecting hole is realized through a hot riveting mode. The first connecting column 1011 and the first connecting hole are multiple, preferably three in this embodiment, so as to avoid the relative position of the first insulating block 101 and the shielding element 104 from being dislocated.

Preferably, the connector further includes two bases disposed at the rear side of the first insulating block 101, wherein the front base is the first base 20, the rear base is the second base 30, and the first base 20 connects the two first insulating blocks 101.

The rear side of the first insulating block 101 is provided with a second connection post 1012, and the front and rear sides of the first base 20 and at least the front side of the second base 30 are provided with second connection holes 204. The second connection post 1012 of the front first insulation block 101 and the first connection post 1011 of the rear first insulation block 101 are inserted into the second connection holes 204 at the front and rear sides of the first base 20, respectively, and the second connection post 1012 of the rear first insulation block 101 is inserted into the second connection hole 204 of the second base 30. The first base 20 functions to connect the two signal transmission members 10.

The first sides of the first base 20 and the second base 30 are provided with a plurality of avoiding grooves 203 at intervals, the avoiding grooves 203 are arranged in one-to-one correspondence with the conductive terminals 102, and the avoiding grooves 203 can accommodate one ends of the contact portions 1023 far away from the fixing portions 1022. The opening of the avoidance groove 203 is flared to increase the chamfer angle, so that the contact portion 1023 can smoothly enter the avoidance groove 203.

Preferably, the connector further includes a housing 40 and a stopper 60, a portion of the signal transmission assembly 10, the first base 20 and the second base 30 are disposed in the housing 40, and the contact portion 1023, the shielding terminal 1042, and the second side of the first base 20 and the second base 30 are disposed exposed from the housing 40. The inner side of the front end of the housing 40 is provided with a plurality of third connection holes, and the first connection posts 1011 on the front side of the first insulation block 101 of the front signal transmission assembly 10 are inserted into the third connection holes of the housing 40. Connecting grooves are formed in the inner walls of the left side and the right side of the shell 40, connecting protrusions 202 matched with the connecting grooves are formed in the left side and the right side of the first insulating block 101, the first base 20 and the second base 30, and the connecting protrusions 202 stretch into the connecting grooves. The two sides of the second base 30 are provided with limiting protrusions, and the housing 40 is provided with limiting grooves matched with the limiting protrusions. After the second base 30 is inserted into the housing 40, the limiting protrusion is matched with the limiting groove for limiting, so as to prevent the signal transmission assembly 10, the first base 20 and the second base 30 from falling off from the housing 40. A stopper 60 is disposed at the rear of the second base 30, and the stopper 60 is fixed to the housing 40 to serve as a stopper.

The housing 40 is provided with two positioning posts 401 at a first side, respectively at the left and right sides, the positioning posts 401 are used for positioning when the connector is mounted.

A plurality of limiting bumps 201 are arranged on the first base 20 and the second base 30 at intervals, the limiting bumps 201 are located on the first sides of the first base 20 and the second base 30, the number and the positions of the limiting bumps 201 and the shielding terminals 1042 are matched, the limiting bumps 201 are attached to the inner surface of the shielding shell 1041, and the wires 103 are located in limiting grooves formed by two adjacent limiting bumps 201.

Preferably, the connector further includes a potting block 50, the potting block 50 is disposed between the first base 20, the second base 30, the first side of the shield 104, and the housing 40, and the wires 103 are partially embedded in the potting block 50. After the signal transmission assembly 10, the first base 20 and the second base 30 are installed in the housing 40, the potting is performed to form the potting block 50. Due to the existence of the limiting bump 201, the glue solution can be prevented from entering between the shielding element 104 and the conductive terminal 102 in the glue pouring process, and the signal transmission performance of the conductive terminal 102 is ensured.

The machining and assembling process of the connector is as follows:

1. processing the conductive terminals 102;

2. injection molding a first insulating block 101, so that a conductive terminal 102 is partially embedded in the first insulating block 101;

3. a bonding wire 103 for bonding the differential signal line to the conductive terminals 102;

4. assembling the shield 104, assembling the shield 104 on the first insulating block 101, and soldering the ground wire 1032 to the shield 104;

5. assembling the first base 20 and the second base 30;

6. assembling the two signal transmission members 10, the first base 20 and the second base 30 into the housing 40;

7. pouring glue to form a glue pouring block 50;

8. the stopper 60 is injection molded.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A connector, comprising:

a signal transmission assembly (10) including a terminal assembly, a wire (103) and a shield (104), wherein the terminal assembly includes a plurality of conductive terminals (102) arranged at intervals, the conductive terminals (102) include fixing portions (1022) and connecting portions (1021), the wire (103) is connected to the connecting portions (1021), the shield (104) includes a shield shell (1041), and the shield shell (1041) is arranged outside one end of the fixing portions (1022), the connecting portions (1021) and the wire (103) close to the connecting portions (1021); the rear end of the shielding shell (1041) is provided with a lead-in groove (10411), the shielding shell (1041) is provided with a containing groove (10412), one end, close to the lead-in groove (10411), of the containing groove (10412) is provided with an anti-falling hole (10413), and a grounding wire (1032) of the lead (103) is led into the anti-falling hole (10413) through the lead-in groove (10411) and is bent and placed in the containing groove (10412);

the base is arranged on the rear side of the fixing part (1022), a plurality of limiting convex blocks (201) are arranged on the base at intervals, the limiting convex blocks (201) are attached to the inner surface of the shielding shell (1041), and the lead (103) is positioned in a limiting groove formed by two adjacent limiting convex blocks (201);

a housing (40), the signal transmission assembly (10) and the base each being disposed within the housing (40);

the glue filling block (50) is arranged in the shell (40) and located between the base and the inner wall of the shell (40) and between the shielding shell (1041) and the inner wall of the shell (40), and the lead (103) is partially embedded in the glue filling block (50).

2. The connector of claim 1, wherein the signal transmission assembly (10) further comprises a first insulating block (101), the fixing portion (1022) is embedded in the first insulating block (101), the first insulating block (101) is located in the shielding member (104), the conductive terminal (102) further comprises a contact portion (1023), the connecting portion (1021) and the contact portion (1023) are respectively located at two sides of the first insulating block (101), and the contact portion (1023) is disposed exposed to the housing (40).

3. The connector according to claim 2, wherein the shield (104) further comprises a plurality of shield terminals (1042) extending from the shield shell (1041), the shield terminals (1042) and the contact portions (1023) are arranged side by side, and one or two contact portions (1023) are arranged between two adjacent shield terminals (1042).

4. The connector of claim 2, wherein a first connection column (1011) is disposed on a front side of the first insulation block (101), and a first connection hole is disposed on the shield (104), and the first connection column (1011) is inserted through the first connection hole.

5. Connector according to claim 4, characterized in that the signal transmission assembly (10) and the base are two, the two signal transmission assemblies (10) are arranged side by side in front and back, and the front base is attached to the shielding shell (1041) of the rear signal transmission assembly (10).

6. The connector according to claim 5, wherein the front side and the rear side of the base are provided with second connecting holes (204), the rear side of the base is provided with second connecting holes (204), the second connecting column (1012) at the rear side of the first insulating block (101) is inserted into the second connecting hole (204) at the front side of the base, and the first connecting column (1011) at the front side of the first insulating block (101) is inserted into the second connecting hole (204) at the rear side of the base.

7. The connector according to claim 5, wherein the inner walls of the left and right sides of the housing (40) are provided with connecting grooves, the left and right sides of the first insulating block (101) and the base are provided with connecting protrusions (202) matched with the connecting grooves, and the connecting protrusions (202) extend into the connecting grooves;

the two sides of the base at the rear are provided with limiting bulges, and the shell (40) is provided with limiting grooves matched with the limiting bulges.

8. The connector of claim 3, wherein the conductive wires (103) are differential signal wires, and two conductive terminals (102) are arranged between two adjacent shield terminals (1042);

the two conductive terminals (102) between the two adjacent shielding terminals (1042) correspond to one differential signal line, two signal lines (1031) of the differential signal line are connected to connecting portions (1021) of the two conductive terminals (102) respectively, and a ground line (1032) of the differential signal line is connected to the shielding shell (1041).

9. The connector according to claim 1, wherein the signal transmission member (10) further comprises an insulating spacer block (105) provided between the connecting portion (1021) and the shield shell (1041).

10. The connector of claim 9, wherein the shield (104) is provided with a fixing hole (10414), the insulating spacer (105) is provided with a fixing post (1051), and the fixing post (1051) is inserted into the fixing hole (10414).