Shielding cylinder and socket

Abstract

The invention relates to the field of parts of connecting devices, in particular to a shielding cylinder and a socket. The shielding cylinder is used for solving the problem that an opening of a mounting part of an existing shielding cylinder is large, and the overall shielding effect of the shielding cylinder is affected. The shielding cylinder comprises a rectangular shielding cylinder section used for being arranged on the outer side of a differential module installation cavity in a sleeving mode, and the two opposite wide edges of the shielding cylinder section extend backwards from the tail end of the shielding cylinder section to form an insertion fixing section used for being fixedly inserted into a base plate of a socket shell. The two opposite narrow edges of the shielding cylinder end at the tail end of the shielding cylinder section, opening structures are formed on the two sides of the two insertion fixing sections in the width direction, and at least one of the two insertion fixing sections extends backwards to form a fisheye terminal used for being connected with a printed board. Therefore, the size of the opening part of the mounting part used for mounting at the tail end of the shielding cylinder section is reduced, the shielding performance of the shielding cylinder at the mounting part is improved, and the risk of crosstalk of adjacent differential modules is reduced.

Description

Technical Field

[0001] The present invention relates to the field of components of connecting devices, and in particular to a shielding cylinder and a socket. Background Art

[0002] With the advancement of communication technology, the demand for higher transmission rates in modern data communication systems is increasing. In current data communication systems, high-speed backplane connectors are used to connect signal paths. High-speed backplane connectors consist of a plug and a receptacle. The receptacle typically includes a receptacle housing, a differential module, and a shielding sleeve. The bottom plate of the receptacle housing is provided with a mounting cavity for the differential module and a hole for the shielding sleeve. After installation, the shielding sleeve fits over the differential module to reduce crosstalk between signal paths, thereby meeting the requirements for high-efficiency transmission.

[0003] For example, Chinese invention patent application publication number CN111864477A discloses a backplane connector comprising a socket housing, a forward-extending differential module mounting cavity integrally connected to the bottom plate of the socket housing, a differential module inserted into the differential module mounting cavity, a shielding tube insertion hole provided on the bottom plate of the socket housing, and a shielding tube inserted therein. The shielding tube comprises a rectangular shielding tube section for fitting over the outside of the differential module mounting cavity, and a U-shaped mounting portion at the rear end of the rectangular shielding tube section. The U-shaped mounting portion has an opening corresponding to the wide side of the shielding tube end, and two parallel walls of the U-shaped mounting portion are provided with mounting barbs along the width direction of the opening for mounting with the shielding tube. The U-shaped mounting portion of the shielding tube has a relatively large opening, which affects the overall shielding effect of the shielding tube. Summary of the Invention

[0004] The purpose of the present invention is to provide a shielding tube to solve the problem that the mounting portion of the existing shielding tube has a large exposure, which affects the overall shielding effect of the shielding tube; the purpose of the present invention is also to provide a socket to solve the problem that the mounting portion of the shielding tube of the existing socket has a large exposure, which affects the overall shielding effect of the shielding tube.

[0005] A shielding tube of the present invention includes a rectangular shielding tube section for being sleeved on the outside of a differential module mounting cavity. The two opposite wide sides of the shielding tube section extend backward from the tail end position of the shielding tube section to form a plug-in fixing section for being fixedly plugged into the shielding tube plug-in hole of the bottom plate of the socket shell. The two opposite narrow sides of the shielding tube both terminate at the tail end position of the shielding tube section, and open structures are formed on both sides of the width direction of the two plug-in fixing sections to avoid the connection between the differential module mounting cavity and the bottom plate of the socket shell. At least one of the two plug-in fixing sections has a fisheye terminal extending backward for connecting to a printed circuit board.

[0006] Furthermore, the plug-in fixing section cooperates with the shielding tube plug-in hole through the barb structure and the forced installation protrusion provided thereon to achieve fixation between the shielding tube section and the socket housing and prevent separation in the front-to-back direction.

[0007] Furthermore, the strong mounting protrusion is provided at the end portion in the width direction of the insertion and fixing section, and the barb structure is a retaining spring provided on the middle sheet of the insertion and fixing section.

[0008] Furthermore, a forced barb is provided at the end of the plug-in fixing section in the width direction, so that after the plug-in fixing section is inserted into the shielding tube plug-in hole from front to back, the forced barb is inserted into the hole wall of the shielding tube plug-in hole to achieve fixation between the shielding tube section and the socket shell and prevent it from falling off in the front and back directions.

[0009] Furthermore, the width direction of the fisheye terminal is consistent with the width direction of the insertion and fixing section, so as to reduce the size of the open structure.

[0010] Furthermore, the insertion and fixing section has a portion for passing through the shielding tube insertion hole and extending to the rear side of the socket shell bottom plate, and the portion is provided with a grounding forced mounting structure for forcedly fitting with the grounding fixing plate.

[0011] Furthermore, the grounding strong mounting structure is a strong mounting protrusion provided at both ends of the insertion fixing section in the width direction.

[0012] Furthermore, the width of the portion of the insertion and fixing section for cooperating with the insertion hole of the shielding cylinder is greater than the width of the portion for cooperating with the grounding fixing plate.

[0013] This invention proposes a brand-new technical solution. The core concept of the invention is to extend the two opposing wide sides of the shielding tube segment backward from the rear end of the shielding tube segment to form a fixed insertion section for fixed insertion with the shielding tube insertion hole of the socket housing bottom plate. The two opposing narrow sides of the shielding tube both terminate at the rear end of the shielding tube segment, and an open structure is formed on both sides of the insertion section in the width direction to avoid the connection between the differential module mounting cavity and the socket housing bottom plate. In this way, the size of the open portion of the mounting portion at the rear end of the shielding tube is reduced, the shielding performance of the shielding tube at the mounting portion is improved, and the risk of crosstalk between adjacent differential modules is reduced.

[0014] Another aspect of the present invention provides a socket, which includes a socket housing, a differential module mounting cavity extending forward is integrally connected to the bottom plate of the socket housing, a differential module is inserted into the differential module mounting cavity, a shielding cylinder insertion hole is provided on the bottom plate of the socket housing and a shielding cylinder is inserted therein, the differential module mounting cavity is integrally connected to the bottom plate of the socket housing through the narrow sides on both sides thereof, the shielding cylinder includes a rectangular shielding cylinder section for sleeved on the outside of the differential module mounting cavity, the two opposite wide sides of the shielding cylinder section extend backward from the tail end position of the shielding cylinder section The shielding tube is fixedly connected to the shielding tube through-hole of the bottom plate of the socket shell, and the two opposite narrow sides of the shielding tube are terminated at the tail end of the shielding tube segment, and an open structure is formed on both sides of the width direction of the two plug-in fixing segments to avoid the connection between the differential module mounting cavity and the bottom plate of the socket shell. At least one of the two plug-in fixing segments is provided with a fisheye terminal for connecting to the printed circuit board. The shielding tube insertion hole includes a pair of narrow strip holes located outside the wide sides of both sides of the differential module mounting cavity for the plug-in fixing segments to be inserted.

[0015] Furthermore, the plug-in fixing section cooperates with the shielding tube plug-in hole through the barb structure and the forced installation protrusion provided thereon to achieve fixation between the shielding tube section and the socket housing and prevent separation in the front-to-back direction.

[0016] Furthermore, the strong mounting protrusion is provided at the end portion in the width direction of the insertion and fixing section, and the barb structure is a retaining spring provided on the middle sheet of the insertion and fixing section.

[0017] Furthermore, a forced barb is provided at the end of the plug-in fixing section in the width direction, so that after the plug-in fixing section is inserted into the shielding tube plug-in hole from front to back, the forced barb is inserted into the hole wall of the shielding tube plug-in hole to achieve fixation between the shielding tube section and the socket shell and prevent it from falling off in the front and back directions.

[0018] Furthermore, the width direction of the fisheye terminal is consistent with the width direction of the insertion and fixing section, so as to reduce the size of the open structure.

[0019] Furthermore, the insertion and fixing section has a portion for passing through the shielding tube insertion hole and extending to the rear side of the socket shell bottom plate, and the portion is provided with a grounding forced mounting structure for forcedly fitting with the grounding fixing plate.

[0020] Furthermore, the grounding strong mounting structure is a strong mounting protrusion provided at both ends of the insertion fixing section in the width direction.

[0021] Furthermore, the width of the portion of the insertion and fixing section for cooperating with the insertion hole of the shielding cylinder is greater than the width of the portion for cooperating with the grounding fixing plate.

[0022] Furthermore, the differential module is forcibly fitted with the bottom plate of the socket housing through two side surfaces of the insulator in the width direction.

[0023] Furthermore, the differential module is forcibly fitted with the ground fixing plate on the rear side of the bottom plate of the socket housing through its insulator.

[0024] Furthermore, the side surfaces of the insulator of the differential module in the width direction are provided with strong mounting ribs, and the insulator is respectively strong-fitted with the bottom plate of the socket housing and the ground fixing plate through the strong mounting ribs.

[0025] Furthermore, the differential module is forcibly fitted with the ground fixing plate on the rear side of the bottom plate of the socket housing through its insulator.

[0026] This invention proposes a brand-new technical solution. The core concept of the invention is to extend the two opposite wide sides of the shielding barrel section of the socket shielding barrel backward from the rear end of the shielding barrel section to form a fixed insertion section for fixed insertion with the shielding barrel insertion hole of the socket shell bottom plate. The two opposite narrow sides of the shielding barrel both terminate at the rear end of the shielding barrel section, and open structures are formed on both sides of the two insertion sections in the width direction to avoid the connection between the differential module mounting cavity and the socket shell bottom plate. In this way, the size of the open part of the mounting portion at the rear end of the shielding barrel for installation is reduced, the shielding performance of the shielding barrel at the mounting portion is improved, and the risk of crosstalk between adjacent differential modules is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A cross-sectional view of a socket according to the present invention; Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle; Figure 3 is a cross-sectional view of the socket from a top view; Figure 4 for Figure 3 Schematic diagram of the enlarged structure at B in the middle; Figure 5 This is a structural schematic diagram of a shielding tube according to the present invention; Figure 6 Schematic diagram of the shielding tube insertion process; Figure 7 It is a cross-sectional view of the shielding cylinder inserted into the socket housing; Figure 8 for Figure 7 Schematic diagram of the enlarged structure at C in the middle; Figure 9 This is a schematic diagram of the structure for installing the shielding tube, the socket housing and the grounding fixing plate; Figure 10 It is a structural diagram of the differential module; Figure 11 Schematic diagram of the insertion process of the differential module; Figure 12 It is a cross-sectional view of a differential module inserted into a socket housing; Figure 13 for Figure 12 Schematic diagram of the enlarged structure at D in the middle; Figure 14 for Figure 12 Schematic diagram of the enlarged structure at E in the middle.

[0028] In the figure: 1. socket housing; 11. socket housing bottom plate; 111. differential module mounting cavity; 112. narrow strip hole; 113. anti-retraction slot; 114. differential module insertion hole; 12. groove; 13. matching slot; 2. shielding tube; 21. shielding tube section; 22. insertion fixing section; 221. first forced installation protrusion; 222. second forced installation protrusion; 223. anti-retraction spring; 224. fisheye terminal; 3. differential module; 31. forced installation rib; 32. positioning step; 33. insulator; 4. grounding fixing plate; 41. narrow strip hole of fixing plate; 42. through-hole. DETAILED DESCRIPTION

[0029] This invention proposes a brand-new technical solution. The core concept of the invention is to extend the two opposing wide sides of the shielding tube segment backward from the rear end of the shielding tube segment to form a fixed insertion segment for fixed insertion with the shielding tube insertion hole of the socket housing bottom plate. The two opposing narrow sides of the shielding tube both terminate at the rear end of the shielding tube segment, and open structures are formed on both sides of the width direction of the two fixed insertion segments to avoid the connection between the differential module mounting cavity and the socket housing bottom plate. In this way, the size of the open portion of the mounting portion at the rear end of the shielding tube is reduced, the shielding performance of the shielding tube at the mounting portion is improved, and the risk of crosstalk between adjacent differential modules is reduced.

[0030] Based on the above invention concept, a specific embodiment of a socket of the present invention is as follows: Figure 1 As shown, the socket includes a socket housing 1, which is a boxed structure including four surrounding walls and a bottom plate at the bottom of the four surrounding walls. Figure 6 The differential module installation cavity 111 extending forward (on the side of the boxed structure opening) is shown. The differential module installation cavity 111 is integrally connected to the socket housing bottom plate 11 through its two narrow sides. Figure 11 As shown, the bottom plate 11 of the socket housing is provided with a differential module insertion hole 114, and the differential module 3 is inserted into the differential module installation cavity 111 from the back to the front through the differential module insertion hole 114. The bottom plate of the socket housing 1 is provided with a shielding cylinder insertion hole and a shielding cylinder 2 is inserted. The shielding cylinder insertion hole includes a pair of narrow strip holes 112 located outside the wide sides of the differential module installation cavity 111. The shielding cylinder 2 is shown in FIG. Figure 5As shown, it includes a rectangular shielding tube segment 21 for being sleeved outside the differential module mounting cavity 111. The two opposite wide sides of the shielding tube segment 21 extend backward from the rear end of the shielding tube segment 21 to form a plug-in fixing segment 22 for fixed insertion into the shielding tube insertion hole of the socket housing base plate 11. The two opposite narrow sides of the shielding tube 2 both terminate at the rear end of the shielding tube segment 21, and an open structure is formed on both sides of the two plug-in fixing segments 22 in the width direction to avoid the connection between the differential module mounting cavity 111 and the socket housing base plate 11. Two fisheye terminals 224 for connecting to the printed circuit board extend backward from both plug-in fixing segments 22. In this way, the mounting portion at the rear end of the shielding tube 2 is only open at its narrow side, reducing the size of the open portion of the mounting portion, improving the shielding performance of the shielding tube at the mounting portion, and reducing the risk of crosstalk between adjacent differential modules 3.

[0031] like Figure 5 As shown, the end of the insertion fixing section 22 in the width direction is provided with a first strong installation protrusion 221. After the installation is completed, as shown in FIG. Figure 2 、 Figure 7 、 Figure 8 As shown, the first strong mounting protrusion 221 is pressed against the two end holes of the narrow hole 112 on the bottom plate 11 of the socket housing, thereby achieving the fixation between the shielding tube section 21 and the socket housing 1; a stop spring 223 is provided on the middle piece of the plug-in fixing section 22, and a stop slot 113 is provided on the bottom plate to cooperate with the stop spring 223, as shown in FIG. Figure 3 、 Figure 4 As shown, when the shielding tube 2 is fully inserted, the retaining spring 223 pops out and engages with the retaining slot 113 to prevent the shielding tube 2 from falling out in the front direction. The simple structure of the forced installation protrusion and retaining spring 223 reliably installs and positions the shielding tube 2, meeting the requirements of the socket under vibration conditions.

[0032] The width direction of the fisheye terminal 224 on the plug-in fixing section 22 is consistent with the width direction of the plug-in fixing section 22 to reduce the size of the open structure. In some embodiments, depending on the setting form of the terminal jack on the printed circuit board connected to the socket, it is also feasible to adapt the width direction of the fisheye terminal to be perpendicular to the width direction of the plug-in fixing section. However, in this embodiment, the fisheye terminal will occupy a certain dimension in the thickness direction of the shielding tube, so it is necessary to ensure that the shielding tube has a certain thickness. At the same time, the size of the open structure will also increase, thereby affecting the shielding performance of the mounting portion of the shielding tube. Therefore, in this embodiment, the width direction of the fisheye terminal 224 is consistent with the width direction of the plug-in fixing section 22. At this time, the shielding tube 2 does not need to reserve a certain thickness, which reduces the size of the open structure, is conducive to improving the shielding performance of the plug-in fixing section 22, and reducing the risk of crosstalk.

[0033] like Figure 9As shown, a groove 12 is provided on the rear side of the socket housing base plate 11, and a grounding fixing plate 4 is placed in the groove 12. All shielding tubes 2 are grounded through the grounding fixing plate 4. The grounding fixing plate 4 is a conductive plate, which can be made of conductive plastic or an insulating plate with a conductive coating on its surface. The grounding fixing plate 4 is provided with a through-hole 42 for the differential module 3 to be inserted, and narrow strip holes 41 of the fixing plate are provided on the outside of the wide sides of the through-hole 42. The plug-in fixing section 22 has a portion for passing through the shielding tube plug-in hole and extending to the rear side of the socket housing base plate 11, and the two ends of the plug-in fixing section 22 in the width direction of the portion are provided with a second strong mounting protrusion 222 for strong fitting with the narrow strip hole 41 of the fixing plate 4. After the plug-in fixing section 22 and the grounding fixing plate 4 are installed, the second strong mounting protrusion 222 presses against the hole wall of the narrow strip hole 41 of the fixing plate, thereby fixing the grounding fixing plate 4. The width of the portion of the insertion and fixing section 22 that mates with the shielding sleeve insertion hole is greater than the width of the portion that mates with the grounding fixing plate. Naturally, the width of the narrow strip hole 112 on the socket housing base plate 11 is also greater than the width of the fixing plate narrow strip hole 41. Thus, the second forced installation protrusion 222 can easily pass through the narrow strip hole 112 on the socket housing base plate 11 and forcefully mate with the fixing plate narrow strip hole 41. Furthermore, when the second forced installation protrusion 222 is forcefully mounted on the grounding fixing plate 4, it does not affect the width of the portion that mates with the shielding sleeve insertion hole, thus ensuring the reliability of the forced fit between the first forced installation protrusion 221 and the narrow strip hole 112.

[0034] like Figure 10 As shown, the differential module 3 is respectively fitted with the socket housing bottom plate 11 and the ground fixing plate 4 by the strong ribs 31 provided on both sides of the width direction of the insulator 33. Figure 11 、 14 As shown, the side of the differential module insertion hole 114 of the socket housing bottom plate 11 is provided with a matching groove 13 that matches the strong mounting rib 31. After the installation is completed, as shown in FIG. Figure 12 、 Figure 13 As shown, the portion of the forced-mounting rib 31 located within the differential module insertion hole 114 is forcedly engaged with the wall of the mating slot 13, and the portion of the forced-mounting rib 31 located within the insertion hole 42 of the grounding fixing plate 4 is forcedly engaged with the wall of the insertion hole 42. In this way, the differential module 3 can be simultaneously installed with the socket housing base plate 11 and the grounding fixing plate 4 through the same rib, which is simple, efficient, and reliable. The differential module is also provided with a positioning step 32 for interlocking with the end face of the socket housing to achieve front-to-back positioning of the differential module. In this way, the grounding fixing plate 4 is fixed to the socket housing 1 through forced engagement with the shielding tube 2 and the differential module 3.

[0035] The present invention also provides other embodiments for the shielding sleeve's insertion and fixing section. In another embodiment, the widthwise end of the insertion and fixing section is provided with a forced-fitting barb. When the insertion and fixing section is inserted from front to back into the shielding sleeve's insertion hole, the forced-fitting barb penetrates the wall of the shielding sleeve's insertion hole, thereby securing the shielding sleeve section to the socket housing and preventing it from falling out in the front-to-back direction. The forced-fitting barb structure is simple, reliably achieving installation and positioning of the shielding sleeve, and meeting the requirements for the socket's use under vibration conditions.

[0036] The present invention also provides other embodiments of the fisheye terminal on the shielding tube. In one embodiment, the width direction of the fisheye terminal on the shielding tube is perpendicular to the width direction of the insertion and fixing section. In another embodiment, the shielding tube is provided with a fisheye terminal for connecting to a printed circuit board only on one insertion and fixing section.

[0037] The present invention also provides other embodiments regarding the grounding forced installation structure of the shielding tube. In another embodiment, the grounding forced installation structure can also be forced installation barbs set at both ends of the plug-in fixed section in the width direction. The forced installation barbs can penetrate into the hole wall of the narrow strip hole of the fixing plate, thereby realizing installation with the grounding fixing plate.

[0038] The present invention also provides other embodiments regarding the width of each part of the plug-in fixing section. In another embodiment, the width of the part of the plug-in fixing section used to cooperate with the plug-in hole of the shielding tube may also be equal to the width of the part used to cooperate with the grounding fixing plate, and it is only necessary to ensure reliable installation.

[0039] The present invention also provides other embodiments for connecting the differential module to the socket housing base. In one embodiment, the differential module can also be forcibly fitted to the socket housing base via two side surfaces of its insulator in the thickness direction. In this case, forcible ribs can be provided on both sides of the differential module in the thickness direction, and the forcible ribs in the thickness direction can be used to forcibly fit the differential module to the socket housing base. In another embodiment, forcible protrusions can be provided on the inner wall surface of the differential module mounting cavity of the socket housing base, and the forcible protrusions can be used to forcibly fit the differential module to the socket housing base via two side surfaces of the insulator in the width direction. The only requirement is to ensure the reliability of the installation of the differential module to the socket housing.

[0040] The present invention also provides other embodiments of the differential module. In another embodiment, the insulator of the differential module may have no matching relationship with the ground fixing plate, and the ground fixing plate only realizes its own installation and positioning through forced matching with the shielding tube.

[0041] Another aspect of the present invention further provides a shielding cylinder, which is the same as the embodiment of the shielding cylinder 2 described above and will not be described in detail here.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A shielding cylinder, characterized in that: The invention comprises a rectangular shielding tube section (21) for being sleeved on the outside of a differential module mounting cavity (111), two opposite wide sides of the shielding tube section (21) extending backward from the tail end position of the shielding tube section (21) to form a plug-in fixing section (22) for being fixedly plugged into the shielding tube plug-in hole of the socket shell bottom plate (11), two opposite narrow sides of the shielding tube (2) both terminate at the tail end position of the shielding tube section (21), and open structures are formed on both sides of the two plug-in fixing sections (22) in the width direction to avoid the connection between the differential module mounting cavity (111) and the socket shell bottom plate (11), and at least one of the two plug-in fixing sections (22) extends backward to have a fisheye terminal (224) for connecting to a printed circuit board.

2. The shielding tube according to claim 1, wherein: The insertion fixing section (22) cooperates with the shielding tube insertion hole through the barb structure and the strong mounting protrusion provided thereon to achieve fixation between the shielding tube section (21) and the socket housing (1) and prevent disengagement in the front-back direction.

3. The shielding tube according to claim 2, wherein: The strong mounting protrusion is provided at the end portion in the width direction of the insertion fixing section (22), and the barb structure is a retaining spring (223) provided on the middle sheet of the insertion fixing section (22).

4. The shielding tube according to claim 1, wherein: The end portion of the plug-in fixing section (22) in the width direction is provided with a strong barb, so that after the plug-in fixing section (22) is inserted into the shielding tube plug-in hole from front to back, the strong barb penetrates into the hole wall of the shielding tube plug-in hole, thereby achieving fixation between the shielding tube section (21) and the socket housing (1) and preventing it from falling off in the front-to-back direction.

5. The shielding cylinder according to any one of claims 1 to 4, characterized in that: The width direction of the fisheye terminal (224) is consistent with the width direction of the insertion fixing section (22), so as to reduce the size of the open structure.

6. The shielding cylinder according to any one of claims 1 to 4, characterized in that: The plug-in fixing section (22) has a portion for passing through the shielding tube plug-in hole and extending to the rear side of the socket housing bottom plate (11), and the portion is provided with a grounding strong mounting structure for strong mounting with the grounding fixing plate (4).

7. The shielding cylinder according to claim 6, wherein: The grounding strong mounting structure is a strong mounting protrusion provided at both ends in the width direction of the plug-in fixing section (22).

8. The shielding tube according to claim 6, wherein: The width of the portion of the insertion fixing section (22) used to cooperate with the shielding tube insertion hole is greater than the width of the portion used to cooperate with the grounding fixing plate (4).

9. A socket, comprising a socket housing (1), a differential module mounting cavity (111) extending forward and integrally connected to a bottom plate (11) of the socket housing, a differential module (3) being inserted into the differential module mounting cavity (111), a shielding tube insertion hole being provided on the bottom plate (11) of the socket housing and a shielding tube (2) being inserted therein, wherein: The differential module mounting cavity (111) is integrally connected to the socket shell bottom plate (11) through the narrow sides thereof, the shielding cylinder is the shielding cylinder (2) according to any one of claims 1 to 8, and the shielding cylinder insertion hole includes a pair of narrow strip holes (112) located outside the wide sides on both sides of the differential module mounting cavity (111) for inserting the fixing section (22).

10. The socket according to claim 9, wherein: The differential module (3) is forcibly fitted with the socket housing bottom plate (11) via two side surfaces of its insulator (33) in the width direction.

11. The socket according to claim 10, wherein: The differential module (3) is forcibly fitted with the ground fixing plate (4) on the rear side of the socket housing bottom plate (11) through its insulator (33).

12. The socket according to claim 11, wherein: A forced mounting rib (31) is provided on the side surface in the width direction of the insulator (33) of the differential module (3), and is forcedly fitted with the socket housing bottom plate (11) and the ground fixing plate (4) respectively through the forced mounting rib (31).

13. The socket according to claim 9, wherein: The differential module (3) is forcibly fitted with the ground fixing plate (4) on the rear side of the socket housing bottom plate (11) through its insulator (33).

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