Conductive column installation holder, socket connector and switching connection structure

Abstract

The invention relates to the field of parts of connecting devices, in particular to a conductive column mounting holder, a socket connector and a switching connection structure. The invention is used for solving the problems of high manufacturing cost and tedious installation of the existing conductive column installation retainer. The conductive column mounting retainer comprises paired conductive column mounting cylinders for inserting and fixing a positive conductive column and a negative conductive column, the paired conductive column mounting cylinders are integrally connected through a retaining plate body, and the retaining plate body is provided with a clamping structure which is clamped and fixed with a socket shell when the retaining plate body is mounted into the socket shell from top to bottom. The positive and negative conductive columns can be simultaneously mounted through one conductive column mounting retainer, so that the mounting is simple and convenient, and the mounting efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of components of connecting devices, and in particular to a conductive post mounting retainer, a socket connector and a transition connection structure. Background Art

[0002] With the rapid development of the electric vehicle industry, cost and high-current fast charging have become major considerations for the entire vehicle. Consequently, existing electric vehicles utilize aluminum busbars, which offer fast charging speeds and low costs. However, due to the complex interior layout, in some cases, a full aluminum busbar cannot be installed. Therefore, it is necessary to break the busbar in the middle and add a transition connection structure to meet the requirements of the vehicle's installation environment.

[0003] Chinese utility model patent application number CN218770178U discloses a connector assembly comprising a plug connector and a receptacle connector. The receptacle connector includes a receptacle housing, within which is disposed a receptacle connection cavity electrically connected to the plug connection cavity. Pairs of receptacle conductive bars extend perpendicularly to the receptacle connection cavity, with bolt connection holes provided on the insertion ends of the bars. The receptacle connector also includes a pair of insulating rubber cores (copper post mounting retainers) inserted from top to bottom into the receptacle connection cavity, with copper posts mounted within the insulating rubber cores. During installation, the receptacle conductive bars are mounted within an insulator, which is inserted into and positioned relative to the receptacle housing. The insulating rubber core includes copper post mounting tubes, each with an outer surface at its end. Both edges of the outer surface are provided with snap-fit ​​structures for snap-fitting with the insulator. This allows the copper posts to be positioned relative to the insulator after installation, ensuring alignment of the copper post bolt holes with the bolt connection holes of the receptacle conductive bars. However, the snap-fit ​​structures are complex to manufacture and relatively expensive. At the same time, when installing the insulating rubber core, each insulating rubber core needs to be clamped into the insulator separately, which makes the installation more complicated. Summary of the Invention

[0004] The purpose of the present invention is to provide a conductive post mounting retainer to solve the problems of high manufacturing cost and complicated installation of existing conductive post mounting retainers; the purpose of the present invention is also to provide a socket connector to solve the problems of high manufacturing cost and complicated installation of existing socket connector conductive post mounting retainers; the purpose of the present invention is also to provide a transfer connection structure to solve the problems of high manufacturing cost and complicated installation of existing socket connector conductive post mounting retainers.

[0005] A conductive post mounting retainer of the present invention includes a pair of conductive post mounting tubes for inserting and fixing positive and negative conductive posts. The pair of conductive post mounting tubes are integrally connected through a retaining plate body, and the retaining plate body is provided with a clamping structure for clamping and fixing with the socket shell when inserted into the socket shell from top to bottom.

[0006] Furthermore, the clamping structure is arranged at a position of the retaining plate body between the paired conductive post mounting cylinders.

[0007] Furthermore, the clamping structure includes a pair of clamping hooks, the parallel direction of the two pairs of clamping hooks is consistent with the direction of the two conductive column mounting cylinders, so as to allow the clamping beam passing through between the two conductive columns in the socket housing to be clamped.

[0008] Furthermore, the retaining plate is also provided with a positioning structure for positioning with the positive and negative conductive bars of the socket.

[0009] Furthermore, the positioning structure is a positioning protrusion that extends into the positioning through-holes on the positive and negative conductive bars of the socket.

[0010] Furthermore, the paired conductive column mounting tubes are arranged one high and one low, the plate body is arranged in a stepped shape and the two step surfaces are respectively connected to the bottom positions of the two conductive column mounting tubes, and the positioning protrusions extend downward from the lower side surfaces of the two step surfaces.

[0011] Furthermore, the clamping structure is provided on the lower side of the upper step surface.

[0012] Furthermore, a snap-fit ​​spring is provided on the conductive post installation tube to cooperate with the corresponding annular grooves of the positive and negative conductive posts to realize snap-fit ​​installation of the positive and negative conductive posts in the conductive post installation tube.

[0013] The present invention provides a technical solution with modified elements: the paired conductive post mounting cylinders on the conductive post mounting holder are integrally connected via a retaining plate. The retaining plate is provided with a snap-fit ​​structure for securing the positive and negative conductive posts when inserted into the socket housing from top to bottom. This allows simultaneous installation of both positive and negative conductive posts using a single conductive post mounting holder, simplifying installation and improving efficiency.

[0014] Another aspect of the present invention provides a socket connector, which includes a socket shell and positive and negative conductive bars of the socket. A socket connection cavity that is connected to the plug connection cavity is provided in the socket shell. The positive and negative conductive bars of the socket are inserted into the socket connection cavity from a direction perpendicular to the socket connection cavity, and bolt connection holes are provided on the insertion ends of the positive and negative conductive bars of the socket. It also includes a conductive column mounting retainer that is inserted into the socket connection cavity from top to bottom. The conductive column mounting retainer includes a pair of conductive column mounting tubes for inserting and fixing the positive and negative conductive columns. The positive and negative conductive columns are installed in the pair of conductive column mounting tubes and bolt through holes are provided thereon. The pair of conductive column mounting tubes are connected as a whole through a retaining plate. The retaining plate is provided with a clamping structure for clamping and fixing with the socket shell when it is inserted into the socket shell from top to bottom.

[0015] Furthermore, the clamping structure is arranged at a position of the retaining plate body between the paired conductive post mounting cylinders.

[0016] Furthermore, the clamping structure includes a pair of clamping hooks, the parallel direction of the two pairs of clamping hooks is consistent with the direction of the two conductive column mounting cylinders, so as to allow the clamping beam passing through between the two conductive columns in the socket housing to be clamped.

[0017] Furthermore, the retaining plate is also provided with a positioning structure for positioning with the positive and negative conductive bars of the socket.

[0018] Furthermore, positioning holes are provided on the insertion ends of the positive and negative conductive bars of the socket, and the positioning structures are positioning protrusions extending into the positioning holes on the positive and negative conductive bars.

[0019] Furthermore, the paired conductive column mounting tubes are arranged one high and one low, the plate body is arranged in a stepped shape and the two step surfaces are respectively connected to the bottom positions of the two conductive column mounting tubes, and the positioning protrusions extend downward from the lower side surfaces of the two step surfaces.

[0020] Furthermore, the clamping structure is provided on the lower side of the upper step surface.

[0021] Furthermore, a snap-fit ​​spring is provided on the conductive post installation tube to cooperate with the corresponding annular grooves of the positive and negative conductive posts to realize snap-fit ​​installation of the positive and negative conductive posts in the conductive post installation tube.

[0022] The present invention provides a technical solution with modified elements: the paired conductive post mounting cylinders on the conductive post mounting holder are integrally connected via a retaining plate. The retaining plate is provided with a snap-fit ​​structure for securing the positive and negative conductive posts when inserted into the socket housing from top to bottom. This allows simultaneous installation of both positive and negative conductive posts using a single conductive post mounting holder, simplifying installation and improving efficiency.

[0023] Another aspect of the present invention provides a transfer connection structure, which includes a plug connector and a socket connector, the socket connector including a socket shell and positive and negative conductive bars of the socket, a socket connection cavity which is conductive to the plug connection cavity is provided in the socket shell, the positive and negative conductive bars of the socket are inserted into the socket connection cavity from a direction perpendicular to the socket connection cavity, and bolt connection holes are provided on the insertion ends of the positive and negative conductive bars of the socket, and also includes a conductive column mounting retainer which is inserted into the socket connection cavity from top to bottom, the conductive column mounting retainer includes a pair of conductive column mounting tubes for inserting and fixing the positive and negative conductive columns, the positive and negative conductive columns are installed in the pair of conductive column mounting tubes and bolt through holes are provided thereon, the pair of conductive column mounting tubes are connected as a whole through a retaining plate, and the retaining plate is provided with a clamping structure for clamping and fixing with the socket shell when inserted into the socket shell from top to bottom.

[0024] Furthermore, the clamping structure is arranged at a position of the retaining plate body between the paired conductive post mounting cylinders.

[0025] Furthermore, the clamping structure includes a pair of clamping hooks, the parallel direction of the two pairs of clamping hooks is consistent with the direction of the two conductive column mounting cylinders, so as to allow the clamping beam passing through between the two conductive columns in the socket housing to be clamped.

[0026] Furthermore, the retaining plate is also provided with a positioning structure for positioning with the positive and negative conductive bars of the socket.

[0027] Furthermore, positioning holes are provided on the insertion ends of the positive and negative conductive bars of the socket, and the positioning structures are positioning protrusions extending into the positioning holes on the positive and negative conductive bars.

[0028] Furthermore, the paired conductive column mounting tubes are arranged one high and one low, the plate body is arranged in a stepped shape and the two step surfaces are respectively connected to the bottom positions of the two conductive column mounting tubes, and the positioning protrusions extend downward from the lower side surfaces of the two step surfaces.

[0029] Furthermore, the clamping structure is provided on the lower side of the upper step surface.

[0030] Furthermore, a snap-fit ​​spring is provided on the conductive post installation tube to cooperate with the corresponding annular grooves of the positive and negative conductive posts to realize snap-fit ​​installation of the positive and negative conductive posts in the conductive post installation tube.

[0031] The present invention provides a technical solution with modified elements: the paired conductive post mounting cylinders on the conductive post mounting holder are integrally connected via a retaining plate. The retaining plate is provided with a snap-fit ​​structure for securing the positive and negative conductive posts when inserted into the socket housing from top to bottom. This allows simultaneous installation of both positive and negative conductive posts using a single conductive post mounting holder, simplifying installation and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural diagram of a transfer connection structure of the present invention; Figure 2 A schematic diagram showing the internal connection structure of a transfer connection structure of the present invention; Figure 3 It is a structural diagram of the socket housing; Figure 4 for Figure 3 A structural diagram from another perspective; Figure 5 is a cross-sectional view of the socket housing; Figure 6 This is a structural diagram of a conductive post mounting retainer installed with the conductive post and positioned with the conductive bar of the socket according to the present invention; Figure 7 This is a schematic structural diagram of a conductive column mounting holder according to the present invention; Figure 8 This is a structural schematic diagram of a conductive column mounting holder from another perspective of the present invention.

[0033] In the figure: 1. socket housing; 11. socket connection cavity; 12. socket tail cover; 13. conductive bar installation cavity; 14. snap-fit ​​crossbeam; 141. guide slope; 2. plug housing; 21. plug connection cavity; 22. plug tail cover; 23. connection operation port; 24. plug top cover; 3. conductive column mounting retainer; 31. conductive column mounting cylinder; 32. retaining plate; 33. snap-fit ​​spring piece; 331 snap protrusion; 34. positioning protrusion; 35. hook; 4. conductive column; 41. ring groove; 5. nut; 6. connecting bolt; 7. sealing ring; 8. plug conductive bar; 9. socket conductive bar; 10. positioning plate. DETAILED DESCRIPTION

[0034] The present invention provides a technical solution with modified elements: the paired conductive post mounting cylinders on the conductive post mounting holder are integrally connected via a retaining plate. The retaining plate is provided with a snap-fit ​​structure for securing the positive and negative conductive posts when inserted into the socket housing from top to bottom. This allows simultaneous installation of both positive and negative conductive posts using a single conductive post mounting holder, simplifying installation and improving efficiency.

[0035] A transfer connection structure of the present invention includes a plug connector and a socket connector, such as Figure 1 、 Figure 2 As shown, when the plug connector and the socket connector are plugged in, a sealing ring 7 is passed between the two to ensure the sealing of the connection between the two. The socket connector includes a socket housing 1 and a socket conductive bar 9. Figure 3 、 Figure 4 、 Figure 5 As shown, the socket housing 1 is provided with a socket connection cavity 11 which is in communication with the plug connection cavity 21 and a conductive bar insertion cavity 13 which is arranged perpendicular to the socket connection cavity 11 and in communication with the socket connection cavity 11. Figure 2 As shown, the positive and negative conductive bars of the socket are inserted into the socket connection cavity 11 from the conductive bar insertion cavity 13, and bolt connection holes are set on the insertion ends of the positive and negative conductive bars of the socket. A nut 5 is fixed on the bottom of the socket connection cavity 11. After the socket conductive bar 9 is inserted, the cavity opening of the conductive bar insertion cavity is sealed with a socket tail cover 12. The socket connector also includes a conductive column mounting retainer 3 that is inserted into the socket connection cavity 11 from top to bottom, as shown in FIG. Figure 7As shown, the conductive post mounting holder 3 includes a pair of conductive post mounting tubes 31 for inserting and securing the positive and negative conductive posts 4. The positive and negative conductive posts 4, each provided with a through-hole for bolts, are mounted within the paired conductive post mounting tubes 31, with both ends of the conductive posts protruding from the ends of the conductive post mounting tubes 31. The conductive post mounting tubes 31 are integrally connected via a retaining plate 32, which is provided with a snap-fit ​​structure for securing the retaining plate 32 to the socket housing 1 when inserted from top to bottom. This allows for simultaneous installation of both positive and negative conductive posts 4 using a single conductive post mounting holder 3, simplifying installation and improving installation efficiency.

[0036] The plug connector may have the same structure as the connector with authorization publication number CN218770178U. Of course, the present invention also provides a plug connector, which includes a plug housing 2, a plug tail cover 22, and a plug conductive bar 8. The plug housing 2 is provided with a plug connection cavity 21 that communicates with the socket connection cavity 11. A connection operation port 23 is also provided at the end of the plug housing 2 facing away from the plug connection cavity 21. The positive and negative conductive bars of the plug are inserted into the plug connection cavity 21 in a direction perpendicular to the plug connection cavity 21 and are installed through the positioning plate 10. Bolt connection holes are provided on the insertion ends of the plug conductive bars 8.

[0037] After the plug connector and the receptacle connector are mated, a connecting bolt 6 is inserted through the connection operation port 23, passed sequentially through the bolt connection holes of the plug conductive bar 8, the bolt holes of the conductive posts 4, and the bolt connection holes of the receptacle conductive bar 9, and finally screwed onto the nut 5 at the bottom of the receptacle connection cavity 11. This clamps the plug conductive bar 8, conductive posts 4, and 9 together, achieving an electrical connection between the positive and negative conductive bars of the plug and the corresponding positive and negative conductive bars of the receptacle. After the conductive bars of the plug and receptacle are connected, the plug cover 24 is installed on the connection operation port 23. The plug cover 24 is integrated with a sealing ring to ensure the sealing of the entire adapter connection structure.

[0038] The clamping structure includes a pair of clamping hooks 35, which are arranged on the retaining plate 32 between the two pairs of conductive column mounting cylinders 31. Figure 8 As shown, on the lower side of the retaining plate 32, between the two pairs of conductive post mounting cylinders 31, an extension arm extending downward is provided, and a buckle is provided on the extension arm to form the hook 35. In the socket connection cavity 11 of the socket housing 1, at the position corresponding to the position between the two conductive posts 4, a Figure 3 、 Figure 4The illustrated engaging crossbeam 14 has its ends connected to the walls of the socket connection cavity 11. The central portion of the engaging crossbeam has a triangular cross-section, with its downwardly sloping surface forming a guiding slope. The paired hooks 35 are aligned in the same direction as the two conductive post mounting tubes 31. During installation, the hooks snap downward along the guiding slopes of the engaging crossbeam 14 and eventually pass over the engaging crossbeam 14. This positions the lower edge of the engaging crossbeam 14 against the hooks, allowing for the installation of the conductive post mounting retainer 3. The hooks 35 are simple in structure and efficiently facilitate installation of the conductive post mounting retainer 3.

[0039] The insertion ends of the positive and negative conductive bars of the socket are each provided with positioning holes. The retaining plate 32 is also provided with positioning bosses 34 that extend into the positioning holes of the positive and negative conductive bars of the socket, respectively. The positioning bosses 34 of the retaining plate 32 achieve relative positioning with the socket conductive bar 9, thereby ensuring that the bolt holes on the positive and negative conductive posts 4 are aligned with the corresponding bolt connection holes on the socket conductive bar 9. This simple structure and reliable positioning ensure that the connection bolts 6 are inserted securely. like Figure 6 、 Figure 7 、 Figure 8 As shown, the paired conductive post mounting tubes 31 are arranged one high and one low, the retaining plate 32 is arranged in a stepped shape, and the two step surfaces are respectively connected to the bottom positions of the two conductive post mounting tubes 31, and the positioning bosses 34 extend downward from the lower side surfaces of the two step surfaces. Of course, correspondingly, the positive and negative conductive bars of the socket and plug are also arranged one high and one low. In this way, the layout of the positive and negative conductive bars in the socket connector is more compact, making the size of the positive and negative conductive bars smaller in the front-to-back direction. The portion of the retaining plate 32 between the two conductive post mounting tubes 31 is flush with the upper step surface, and the snap-in structure is provided on the lower side surface of the upper step surface.

[0040] like Figure 7 As shown, a snap-fit ​​spring 33 is provided on the conductive post mounting barrel 31, and an annular groove 41 is provided on the positive and negative conductive posts 4. The snap-fit ​​spring 33 is used to cooperate with the corresponding annular groove 41 to achieve snap-fit ​​installation of the positive and negative conductive posts within the conductive post mounting barrel 31. The snap-fit ​​spring 33 has a simple structure, ensuring a reliable connection between the conductive post 4 and the conductive post mounting barrel 31, and also making installation of the two relatively simple and improving installation efficiency.

[0041] Regarding the position of the clip-on structure, the present invention also provides other embodiments. In one embodiment, the portion of the retaining plate between the two conductive column mounting cylinders is flush with the lower step surface, and the clip-on structure may also be located on the lower side surface of the lower step surface; in another embodiment, the clip-on structure may also be located at the edge of the retaining plate for clipping and fixing with the wall of the socket connection cavity.

[0042] The present invention also provides another embodiment of the snap-in structure. In another embodiment, the snap-in structure can also be a spring sheet at the edge of the retaining plate, with a snap-in protrusion provided on the spring sheet, and a snap-in groove for cooperating with the snap-in protrusion provided on the wall of the socket connection cavity, and the snap-in fixation of the two is achieved by relying on the cooperation between the snap-in protrusion and the snap-in groove.

[0043] Regarding the arrangement of the paired conductive post mounting tubes, the present invention also provides another embodiment. In another embodiment, the paired conductive post mounting tubes are arranged at the same height, and the positive and negative conductive rows of the socket are also arranged at the same height. Correspondingly, the retaining plate is also arranged in a flat surface as a whole.

[0044] Regarding the position of the retaining plate, the present invention also provides another embodiment. In another embodiment, the retaining plate can also be located in the middle of the cylinders of the two conductive column mounting cylinders.

[0045] Regarding the positioning structure, the present invention also provides another embodiment. In another embodiment, the positioning structure is a positioning through-hole, and positioning bosses are provided on the insertion ends of the positive and negative conductive bars of the socket. The relative positioning of the two is achieved by the cooperation of the positioning bosses and the positioning through-holes.

[0046] Regarding the installation of the conductive column mounting retainer and the positive and negative conductive columns, the present invention also provides another embodiment. In another embodiment, a boss can be set at the end of the copper column, and the copper column is inserted into the conductive column mounting cylinder from bottom to top and is stopped by the boss and the retaining plate. A mounting plate extending toward the conductive bar is provided on the socket housing, the retaining plate is mounted on the mounting plate, and the ring of the copper column is clamped between the retaining plate and the conductive bar to achieve the installation of the positive and negative conductive columns.

[0047] Another aspect of the present invention further provides a socket connector. Since the socket connector is the same as the above-mentioned embodiment of the socket connector, it will not be described in detail here.

[0048] Another aspect of the present invention further provides a conductive post mounting retainer. Since the conductive post mounting retainer is the same as the above-mentioned conductive post mounting retainer, it will not be described in detail here.

[0049] 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 conductive column mounting holder, characterized in that: The invention comprises a pair of conductive column mounting cylinders (31) for inserting and fixing positive and negative conductive columns, wherein the pair of conductive column mounting cylinders (31) are integrally connected via a retaining plate (32), and the retaining plate (32) is provided with a clamping structure for clamping and fixing with the socket housing (1) when the socket housing (1) is inserted into the socket housing (1) from top to bottom.

2. The conductive post mounting holder according to claim 1, wherein: The clamping structure is arranged at a position of the retaining plate body (32) between the paired conductive column mounting cylinders (31).

3. The conductive post mounting holder according to claim 2, wherein: The clamping structure comprises a pair of clamping hooks (35), wherein the parallel directions of the two clamping hooks (35) are consistent with the directions of the two conductive column mounting cylinders (31), so as to be clamped into a clamping beam (141) passing through between the two conductive columns (4) in the socket housing (1).

4. The conductive post mounting holder according to any one of claims 1 to 3, characterized in that: The retaining plate (32) is also provided with a positioning structure for positioning with the positive and negative conductive bars of the socket.

5. The conductive post mounting holder according to claim 4, wherein: The positioning structure is a positioning boss (34) extending into the positioning through-holes on the positive and negative conductive bars of the socket.

6. The conductive post mounting holder according to claim 5, wherein: The paired conductive column mounting cylinders (31) are arranged one high and one low, the retaining plate (32) is arranged in a stepped manner, and the two step surfaces are respectively connected to the cylinder bottom positions of the two conductive column mounting cylinders (31), and the positioning protrusions (34) respectively extend downward from the lower side surfaces of the two step surfaces.

7. The conductive post mounting holder according to claim 6, wherein: The clamping structure is arranged on the lower side of the upper step surface.

8. The conductive post mounting holder according to any one of claims 1 to 3, characterized in that: A snap-fit ​​spring (33) is provided on the conductive column installation cylinder (31) for cooperating with the annular grooves of the corresponding positive and negative conductive columns (4) to achieve snap-fit ​​installation of the positive and negative conductive columns in the conductive column installation cylinder.

9. A socket connector, characterized in that: The invention comprises a socket housing and a socket positive and negative conductive row, wherein a socket connection cavity is provided in the socket housing and is connected to the plug connection cavity, wherein the socket positive and negative conductive rows are inserted into the socket connection cavity from a direction perpendicular to the socket connection cavity and bolt connection holes are provided on the insertion ends of the socket positive and negative conductive rows, and further comprises a conductive column mounting retainer which is inserted into the socket connection cavity from top to bottom, wherein the conductive column mounting retainer comprises a pair of conductive column mounting cylinders (31) for inserting and fixing the positive and negative conductive columns, wherein the positive and negative conductive columns (4) are installed in the pair of conductive column mounting cylinders (31) and bolt through holes are provided on the pair of conductive column mounting cylinders (31), wherein the pair of conductive column mounting cylinders (31) are connected as a whole through a retaining plate (32), and the retaining plate (32) is provided with a clamping structure for clamping and fixing the socket housing (1) when the socket housing (1) is inserted from top to bottom.

10. The socket connector according to claim 9, wherein: The clamping structure is arranged at a position of the retaining plate body (32) between the paired conductive column mounting cylinders (31).

11. The socket connector according to claim 10, wherein: The clamping structure comprises a pair of clamping hooks (35), wherein the parallel directions of the two clamping hooks (35) are consistent with the directions of the two conductive column mounting cylinders (31), so as to be clamped into a clamping beam (141) passing through between the two conductive columns (4) in the socket housing (1).

12. The socket connector according to any one of claims 9 to 11, characterized in that: The retaining plate (32) is also provided with a positioning structure for positioning with the positive and negative conductive bars of the socket.

13. The socket connector according to claim 12, wherein: Positioning holes are provided on the insertion ends of the positive and negative conductive bars of the socket, and the positioning structure is a positioning protrusion (34) extending into the positioning holes on the positive and negative conductive bars of the socket.

14. The socket connector according to claim 13, wherein: The paired conductive column mounting cylinders (31) are arranged one high and one low, the retaining plate (32) is arranged in a stepped manner, and the two step surfaces are respectively connected to the cylinder bottom positions of the two conductive column mounting cylinders (31), and the positioning protrusions (34) respectively extend downward from the lower side surfaces of the two step surfaces.

15. The socket connector according to claim 14, wherein: The clamping structure is arranged on the lower side of the upper step surface.

16. The socket connector according to any one of claims 9 to 11, characterized in that: A snap-fit ​​spring (33) is provided on the conductive column installation cylinder (31) for cooperating with the annular grooves of the corresponding positive and negative conductive columns (4) to achieve snap-fit ​​installation of the positive and negative conductive columns in the conductive column installation cylinder.

17. A transfer connection structure, comprising a plug connector and a socket connector, characterized in that: The socket connector is the socket connector according to any one of claims 9 to 16.

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