A connector and PCB socket assembly thereof

Abstract

The present invention relates to a connector and a PCB socket assembly thereof. The PCB socket assembly defines its lower end as a plug-in end, comprises a PCB board and a PCB board contact piece welded and connected to the PCB board, the PCB socket assembly further comprises a socket insulator arranged on the lower side plate surface of the PCB board, the PCB board is provided with a contact piece mounting hole, the PCB board contact piece is inserted into the contact piece mounting hole, the socket insulator is provided with a lower guide hole which is parallel to the axis of the mounting hole and is used for guiding and plugging with a guide column on a plug insulator, by providing a plug insulator and providing a floating structure on the plug insulator, the adapter plug can be connected to the RU socket first, and then the PCB board contact piece can be connected to the adapter contact piece by moving the PCB socket assembly, so that the connection between the PCB board and the RU socket can be completed, when the PCB board is disassembled, the PCB board can be directly removed, compared with the prior art, the assembly and maintenance are convenient, no specific sequence is required, the disassembly steps can be reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to a connector and a PCB socket assembly thereof. Background Art

[0002] The structure of outdoor base station RU (base station remote unit) is as follows Figure 1 As shown, it generally includes an RU box 1, a PCB board 3 arranged in the RU box 1, and a PCB socket 2 welded to the PCB board. The PCB socket 2 is plugged into the RU socket 4. The RU socket 4 is generally an RU square plate socket, which is inserted into the RU box from the outside of the RU box. The PCB socket 2 includes an insulator and a contact member arranged in the insulator. The contact member includes a plug-in portion for conducting with the PCB board and a transfer portion for plugging with the RU socket 4. The plug-in portion and the transfer portion are arranged in an L shape. The plug-in direction of the RU socket 4 is parallel to the PCB board 3. When assembled, the socket connection portions of the RU socket 4 and the PCB socket 2 are directly plugged into contact.

[0003] However, due to the limited space inside the RU box, the existing installation sequence must be to install the PCB socket first and install the PCB board in place before installing the RU socket from the outside of the RU box. During the installation process, the RU socket is directly plugged into the PCB socket, and this assembly sequence cannot be changed. If the RU socket is installed first, the PCB board will not be able to move along the axis of the RU socket, and it will not be able to connect to the RU socket. When the PCB socket or other components fail and the PCB board needs to be removed, the PCB board cannot be directly removed because the PCB socket is located below the PCB board and is in a plug-in state with the RU socket. The RU socket must be removed first before the PCB board can be removed, and the removal sequence cannot be changed.

[0004] Therefore, the existing base station remote unit assembly and maintenance procedures are complicated, the operation is very inconvenient, and will have a great impact on the work efficiency. Repeated disassembly of the RU socket may also cause problems with the connector sealing. Summary of the invention

[0005] The object of the present invention is to provide a connector to solve the problem of inconvenient assembly and maintenance of the existing base station remote unit; the object of the present invention is also to provide a PCB socket assembly of the connector.

[0006] To achieve the above object, the technical solution of the PCB socket assembly of the present invention is:

[0007] Scheme 1: A PCB socket assembly, whose lower end is defined as a plug-in end, comprises a PCB board and a PCB board contact piece welded and connected to the PCB board, the PCB socket assembly also comprises a socket insulator arranged on the lower side panel of the PCB board, the PCB board is provided with a contact piece mounting hole, the PCB board contact piece is inserted into the contact piece mounting hole, the socket insulator is provided with a lower guide hole which is parallel to the axis of the mounting hole and is used for guiding and plugging with the guide column on the plug insulator, the PCB board contact piece also has a spring piece which is used for elastically pressing and fitting with the two side panels of the adapter plug-in part to achieve conduction, the bottom plate is provided with an avoidance hole for the plug-in part to pass through, the spring piece has two rows, upper and lower, the spring piece located in the lower row is formed by bending and extending the two end edges corresponding to the two side panels of the plug-in part on the bottom plate, and the lower spring piece has an arc-shaped guide surface for guiding and matching with the plug-in part.

[0008] Solution 2: Based on Solution 1, the PCB board is further provided with an upper guide hole coaxially arranged with the lower guide hole.

[0009] Solution 3: Based on Solution 2, the socket insulator is an insulating plate attached to the lower surface of the PCB board, and a mounting structure for fixing the PCB board contact piece is provided on the insulating plate so that the PCB board contact piece can extend into the mounting hole.

[0010] Solution 4: Based on Solution 1 or 2, there are more than two lower guide holes, and the lower guide holes are arranged at intervals on the socket insulator.

[0011] Solution 5: Based on Solution 2, the PCB contact piece has a solder foot that is welded to the PCB board, and the mounting structure includes a solder foot fixing hole provided on the insulator for the solder foot to pass through and to be interference fitted with the solder foot.

[0012] Solution 6: Based on any one of Solutions 1 to 3, there are at least two spring pieces located on the same side panel of the plug-in portion, which are arranged horizontally and spaced apart in a direction parallel to the panel surface of the plug-in portion.

[0013] Solution 7: Based on Solution 6, there are at least two rows of spring sheets on each side panel of the plug-in portion, which are arranged at intervals in the up-and-down direction.

[0014] Solution 8: Based on Solution 7, the spring pieces located in the uppermost row protrude from the upper surface of the PCB board.

[0015] Solution 9: Based on Solution 6, the PCB board contact piece is composed of two parts that are relatively spaced apart on opposite sides of the plug-in part, and the lower end surface of each part close to the plug-in part is provided with an arc-shaped guide surface that is bent upward to guide the insertion of the plug-in part.

[0016] Solution 10: Based on Solution 6, the PCB board contact includes a base plate, and the spring sheets located in the upper row are formed by bending upward and extending from the edges of the base plate corresponding to the board surfaces on both sides of the plug-in part located in the avoidance hole, and the corresponding two side edges of the base plate perpendicular to the board surface of the plug-in part are bent upward to form the soldering feet.

[0017] Solution 11: Based on any one of Solutions 1 to 3, the PCB board is a rectangular board structure, and there are two mounting holes, which are arranged at intervals along the diagonal direction of the board surface of the PCB board.

[0018] The technical solution of the connector of the present invention is:

[0019] Solution 12: A connector, comprising an RU socket for fixing on an RU box and a PCB socket assembly arranged in the box, and also comprising a transfer plug for fixing in the RU box and connected to the RU socket, wherein the lower end of the PCB socket assembly is defined as a plug-in end, the PCB socket assembly comprises a PCB board and a PCB board contact piece welded and connected to the PCB board, the transfer plug comprises a plug insulator and a transfer contact piece arranged on the plug insulator, the transfer contact piece has a plug-in portion for guiding and plugging with the PCB board contact piece, the plug insulator has a floating structure for enabling the plug-in portion to be movably plugged with the PCB board contact piece in a direction perpendicular to the plug-in direction, and the PCB socket assembly also comprises a plug-in portion arranged on the lower side surface of the PCB board The socket insulator is provided with a contact mounting hole on the PCB board, and the PCB board contact is installed in the contact mounting hole. The plug insulator is provided with a guide column extending up and down. The socket insulator is provided with a lower guide hole which is parallel to the axis of the mounting hole and is used for guiding and plugging with the guide column on the plug insulator. The PCB board contact also has a spring sheet for elastically pressing and fitting with the two side panels of the adapter plug-in part to achieve conduction. The PCB board contact includes a bottom plate, and the bottom plate is provided with an avoidance hole for the plug-in part to pass through. The spring sheet has two rows, upper and lower. The spring sheet located in the lower row is formed by bending and extending the two end edges corresponding to the two side panels of the plug-in part on the bottom plate upward, and the lower spring sheet has an arc-shaped guiding surface for guiding and matching with the plug-in part.

[0020] Solution 13: Based on Solution 12, the PCB board is further provided with an upper guide hole coaxially arranged with the lower guide hole.

[0021] Solution 14: Based on Solution 13, the socket insulator is an insulating plate attached to the lower surface of the PCB board, and a mounting structure for fixing the PCB board contact piece is provided on the insulating plate so that the PCB board contact piece can extend into the mounting hole.

[0022] Solution 15: Based on Solution 12 or 14, there are more than two lower guide holes, and the lower guide holes are arranged at intervals on the socket insulator.

[0023] Solution 16: Based on Solution 13, the PCB contact piece has a solder foot that is welded to the PCB board, and the mounting structure includes a solder foot fixing hole provided on the insulator for the solder foot to pass through and to be interference fit with the solder foot.

[0024] Solution 17: Based on any one of Solutions 12 to 14, there are at least two spring pieces located on the same side panel of the plug-in portion, which are arranged horizontally and spaced apart in a direction parallel to the panel surface of the plug-in portion.

[0025] Solution 18: Based on Solution 17, there are at least two rows of spring sheets on the same side panel of the plug-in portion, which are arranged at intervals in the up and down directions.

[0026] Solution 19: Based on Solution 18, the spring pieces located in the uppermost row protrude from the upper surface of the PCB board.

[0027] Solution 20: Based on Solution 17, the PCB board contact piece is composed of two parts that are relatively spaced apart on opposite sides of the plug-in part, and the lower end surface of each part close to the plug-in part is provided with an arc-shaped guide surface that is bent upward to guide the insertion of the plug-in part.

[0028] Solution 21: Based on Solution 17, the spring pieces located in the upper row are formed by bending upward and extending from the edges of the bottom plate located at the avoidance hole corresponding to the two side plate surfaces of the plug-in part, and the corresponding two side edges of the bottom plate perpendicular to the plate surface of the plug-in part are bent upward to form the welding feet.

[0029] Solution 22: Based on any one of Solutions 12 to 14, the PCB board is a rectangular board structure, and there are two mounting holes, which are arranged at intervals along the diagonal direction of the board surface of the PCB board.

[0030] The beneficial effects of the present invention are as follows: the present invention adopts the above technical solution, by setting a plug insulator, and by setting a floating structure on the plug insulator, the adapter plug can be connected to the RU socket first, and then the PCB board contact can be connected to the adapter contact by moving the PCB socket assembly, so that the connection between the PCB board and the RU socket can be completed. When disassembling the PCB board, the PCB board can be directly removed. Compared with the prior art, the assembly and maintenance are convenient, no specific sequence is required, and the disassembly steps can be reduced, thereby improving the working efficiency; further, the PCB socket assembly includes a socket insulator, and a lower guide hole is set on the socket insulator, and the PCB board contact is inserted and fixed in the mounting hole of the PCB board, and the early guide matching of the lower guide hole and the guide column can be achieved by designing the thickness of the socket insulator, thereby reducing the spatial guide distance when the PCB board contact and the adapter contact are plugged in; further, the PCB board contact is inserted into the mounting hole, which can save the internal space of the box while shortening the spatial guide distance, making the structure more compact and more convenient to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the connector structure in the prior art;

[0032] Figure 2 It is a structural schematic diagram of an embodiment of the connector of the present invention without the PCB socket assembly;

[0033] Figure 3 for Figure 2 Schematic diagram of the assembly structure of the intermediate transfer plug and RU box;

[0034] Figure 4 for Figure 3 The main view;

[0035] Figure 5 for Figure 4 A top view of

[0036] Figure 6 for Figure 3 Schematic diagram of the adapter plug structure;

[0037] Figure 7 It is a schematic diagram of the structure of the PCB socket assembly;

[0038] Figure 8 It is a schematic diagram of the structure of the connector of the present invention in a floating state in the front-to-back direction during assembly;

[0039] Fig. 9 It is a schematic diagram of the structure of the connector of the present invention in the floating state in the up and down directions during assembly;

[0040] Fig.10 It is a schematic diagram of the structure of the connector of the present invention in the floating state in the left and right directions when assembled;

[0041] Fig.11 for Fig. 9 A local enlarged view of point A in FIG.

[0042] Fig.12 for Fig.10 Schematic diagram of the PCB socket component structure. DETAILED DESCRIPTION

[0043] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0044] The embodiment of the connector of the present invention is as follows Figures 2 to 12 As shown, it includes a PCB socket assembly 3 and a conversion plug 5 for being arranged in the RU box 1, and a RU socket 4 for being penetrated on the side wall of the RU box 1. The RU socket 4 is inserted into the RU box 1 from the outside and fixed on the side wall of the RU box 1 by screws.

[0045] The adapter plug 5 includes a plug insulator 51 for connecting to the RU box 1 and a transfer contact arranged in the plug insulator 51. The transfer contact includes a plug portion 52 for plugging with the PCB socket assembly 3 to achieve conduction and a transfer portion for plugging with the RU socket to achieve conduction. The plug portion 52 and the transfer portion are arranged in an L shape. The plug portion 52 extends from the upper end surface of the transfer seat and is a plug board with a plate-like structure.

[0046] The above-mentioned PCB socket assembly 3 includes a PCB board 31 and a PCB board contact 33 arranged on the PCB board 31, and the plug-in direction of the PCB board contact 33 and the plug-in part 52 is defined as the up and down direction, and the PCB board 31 is located above the adapter plug 5, and the plug-in part 52 is located on the front side of the adapter. The PCB contact member 33 includes a bottom plate 333 arranged parallel to the PCB board 31. The left and right sides of the bottom plate 333 are bent upward to have pins for welding and fixing to the PCB board 31. At the same time, the front and rear sides of the bottom plate 333 are bent upward to have upper spring pieces 331 for pressing and contacting with the corresponding board surface of the plug-in portion 52 to achieve conduction. The top ends of the upper spring pieces 331 on both sides are close to each other in the front-to-back direction for clamping the plug-in portion 52. At the same time, an avoidance hole 334 for avoiding the plug-in portion 52 is provided on the bottom plate 333. The front and rear edges of the avoidance hole 334 are bent upward to have lower spring pieces 332 for pressing and contacting with the corresponding board surface of the plug-in portion 52 to achieve conduction. The upper spring piece 331 is arranged at an interval from the lower spring piece 332. The top ends of the lower spring pieces 332 on both sides are close to each other in the front-to-back direction for clamping the plug-in portion 52, thereby enabling multi-point contact between the PCB contact member 33 and the plug-in portion 52. In this embodiment, in order to further realize the multi-point contact between the PCB board contact 33 and the plug-in portion 52, the above-mentioned lower spring sheet 332 and upper spring sheet 331 are provided with a plurality of them, which are arranged at intervals along the left-right direction. In addition, the above-mentioned spring sheets are all located in the mounting hole 311 provided on the PCB board 31, and the upper spring sheet 331 passes through the mounting hole 311 upward and protrudes from the upper plate surface of the PCB board 31, so that the height of the upper spring sheet 331 can be ensured, thereby ensuring the yield strength of the upper spring sheet 331, and at the same time, the internal space of the box can be saved, and the distance between the PCB board 31 and the adapter plug 5 after plugging can be reduced. At the same time, the left-right dimension of the above-mentioned avoidance hole 334 is greater than the left-right dimension of the plug-in portion 52. Through the cooperation between the plug-in portion 52 and the spring sheet, the plug-in portion 52 can move in the left-right direction when inserted into the PCB board contact 33, forming a floating structure in the left-right direction, thereby avoiding damage to the PCB board contact 33 and the adapter contact when the PCB board 31 is installed. Furthermore, since the PCB contact member 33 is a vertically penetrating structure, the distance between the PCB board 31 and the adapter plug 5 can be flexibly adjusted.

[0047] The plug insulator 51 is provided with a long hole extending in the front-to-back direction to realize the front-to-back floating of the plug insulator 51, and a floating sleeve 54 that is movable front-to-back is provided in the long hole. The floating sleeve 54 has an upper end face for press-fitting with a fastener and a lower end face for press-fitting with the RU box 1. The outer peripheral surface of the floating sleeve 54 is provided with an annular groove 55 for the plug insulator 51 to be clamped and slid back and forth. The arc groove can realize both the reliable fixation of the adapter plug 5 on the RU box 1 and the front-to-back floating of the plug insulator 51, thereby avoiding jamming due to the limited fixed position of the PCB board 31 when the adapter plug 5 is connected to the PCB socket assembly 3.

[0048] A guiding column 53 is also convexly provided on the top surface of the plug insulator 51. Correspondingly, a guiding hole 321 extending in the left-right direction is provided on the PCB socket assembly 3. A guiding inclined surface 531 is provided on the top of the guiding column 53 for guiding the guiding column 53 into the guiding hole 321 in the front-back and left-right directions. In the process of downwardly installing the PCB board 31, before the plug-in portion 52 of the adapter plug 5 is plugged into the spring piece of the PCB board contact piece 33, the guiding column 53 can first be guided with the guiding hole 321 to avoid excessive force and damage when the plug-in portion 52 is plugged into the spring piece on the PCB board contact piece 33. The guiding inclined surface 531 of the guiding column 53 can be a large slope surface to improve the guiding effect. At the same time, in the present embodiment, in order to ensure that the PCB socket assembly 3 will not tilt when the PCB socket assembly 3 and the adapter plug 5 are relatively close to each other, in the present embodiment, there are two guide posts 53, which are arranged at intervals along the front-to-back direction, and there are two corresponding guide holes 321, which are arranged at intervals along the front-to-back direction. One of the guide posts 53 arranged in this way can not only play a role in guiding the plug-in, but also play a role in protecting and supporting the PCB socket assembly 3.

[0049] At the same time, in order to achieve early guidance between the adapter plug 5 and the PCB socket assembly 3 during assembly and reduce the spatial guidance distance, in this embodiment, the above-mentioned PCB socket assembly 3 also includes a socket insulator 32 attached to the lower plate surface of the PCB board 31, and the above-mentioned guide hole 321 is composed of coaxial through holes set on the PCB board 31 and the socket insulator 32, wherein the through hole on the PCB board is the upper guide hole, and the through hole on the socket insulator constitutes the lower guide hole, so that the guide column 53 can be prevented from directly contacting the PCB board 31 and causing the friction force in the guiding process to damage the structure of the PCB board 31. At the same time, a pin through hole 323 for fixing the pin is also provided on the socket insulator 32. In this embodiment, the pin and the pin through hole 323 are interference-fitted, and the upper end of the pin extends out of the upper end surface of the socket insulator 32, and is used for welding and conducting with the pin fixing hole 312 on the PCB board 31. At the same time, a receiving hole 324 is also provided on the socket insulator 32 at a position corresponding to the mounting hole 311 , the bottom plate 333 of the PCB contact member 33 is fixed in the receiving hole 324 , and the upper spring sheet 331 and the lower spring sheet 332 extend into the mounting hole 311 .

[0050] In the actual assembly process, the PCB contact piece 33 is firstly installed on the socket insulator 32 by interference fit, and then the socket insulator 32 and the PCB board 31 are relatively fixed, and the pins are welded on the PCB board 31 to achieve conduction; then the PCB socket assembly 3 with the PCB contact piece 33 welded is installed into the RU box 1. During the downward installation of the PCB socket assembly 3, the large-angle guiding inclined surface 531 on the guiding column 53 on the adapter socket first contacts with the guiding hole 321 of the PCB socket assembly 3, and cooperates with the floating of the plug insulator 51 in the front-to-back direction to guide the plug-in portion 52, as shown in FIG. Fig.11 As shown. After the plug-in portion 52 is guided, the PCB socket assembly 3 continues to fall, the plug-in portion 52 of the plate-like structure contacts the PCB board contact 33, and the PCB socket assembly 3 continues to fall, and the plug-in portion 52 is inserted into the PCB board contact 33 until the PCB socket assembly 3 is installed in place. Since the plug-in portion 52 is inserted into the PCB board contact 33 to a greater depth, that is, the contact length is sufficient, it can achieve floating in the up and down directions, and can be compatible with a larger installation height range of the PCB socket assembly 3. Since the width of the guide hole 321 on the PCB socket assembly 3 is greater than the width of the guide column 53 of the plug insulator 51, there is a gap in the left and right directions when the two sides cooperate, and the width of the PCB board contact 33 is greater than the width of the plug-in portion 52, so floating in the left and right directions can be achieved at the same time. This can ensure reliable plugging of the PCB socket assembly 3 relative to the adapter plug 5 when assembled.

[0051] Meanwhile, in this embodiment, there are two PCB board contacts 33, and the corresponding PCB board 31 is a rectangular plate structure. The two PCB board contacts 33 are arranged at intervals along the diagonal direction of the board surface of the PCB board 31, so that the two PCB board contacts 33 are relatively staggered and installed, increasing the node spacing and improving the safety performance. The corresponding adapter plug 5 has contact mounting holes 311 arranged at intervals on the left and right, and the apertures of the two contact mounting holes 311 are large and small, so as to prevent the wrong insertion and assembly when the RU socket is plugged in.

[0052] In other embodiments, the above-mentioned PCB board contact member 33 can also be set to be two parts arranged separately, and the two parts are arranged relatively to each other in the mounting hole 311 along the front-to-back direction, and the corresponding bottom plate 333 of the PCB board contact member 33 is divided into two pieces, each of which is provided with an upper spring piece 331, a lower spring piece 332 and a pin.

[0053] In this embodiment, the spring sheet is bent backward at the top to form a tongue hole structure, which is convenient for the plug-in of the plug-in part 52, and the contact between the spring sheet and the plug-in part 52 is line contact. In other embodiments, the structure of the spring sheet can be composed of an oblique edge extending obliquely upward, so that the contact between the spring sheet and the plug-in part 52 can be surface contact. The structure of the spring sheet can also be set to a spherical structure at the top, so that the contact between the spring sheet and the plug-in part 52 can be point contact.

[0054] In other embodiments, the socket insulator 32 can be configured as a guide sleeve fixed on the lower end surface of the PCB board 31, and the guide sleeve is only set at the position corresponding to the guide column 53, and the PCB board contact 33 is directly welded and fixed on the PCB board 31. This can save the cost of the socket insulator 32 and also achieve a reduction in the spatial guiding distance.

[0055] In other embodiments, the number of rows of the spring pieces can be increased or decreased according to actual needs, and the number of spring pieces in each row can also be increased or decreased accordingly.

[0056] In other embodiments, the number of the above-mentioned guide posts 53 can be increased according to actual assembly needs; the relative positions of the two PCB board contacts 33 can be designed arbitrarily, such as an arrangement in which they are spaced side by side and relatively elongated.

[0057] The structure of the embodiment of the PCB socket assembly involved in the present invention is consistent with the structure of the PCB socket assembly in the embodiment of the connector described above, and will not be elaborated on in detail.

Claims

1. A PCB socket assembly, the lower end of which is defined as a plug-in end, comprising a PCB board and a PCB board contact piece welded and connected to the PCB board, characterized in that: The PCB socket assembly also includes a socket insulator arranged on the lower side plate surface of the PCB board, the PCB board is provided with a contact mounting hole, the PCB board contact is installed in the contact mounting hole, the socket insulator is provided with a lower guide hole parallel to the axis of the mounting hole and used for guiding and plugging with the guide column on the plug insulator, the PCB board contact also has a spring piece used for elastically pressing and fitting with the two side plates of the adapter plug part to achieve conduction, the PCB board contact includes a bottom plate, the bottom plate is provided with an avoidance hole for the plug part to pass through, the spring piece has two rows, upper and lower, the spring piece located in the lower row is formed by bending and extending the two end edges corresponding to the two side plates of the plug part on the bottom plate, and the lower spring piece has an arc-shaped guiding surface for guiding and matching with the plug part.

2. The PCB socket assembly according to claim 1, characterized in that: The PCB board is also provided with an upper guide hole coaxially arranged with the lower guide hole.

3. The PCB socket assembly according to claim 2, characterized in that: The socket insulator is an insulating plate attached to the lower surface of the PCB board, and a mounting structure for fixing the PCB board contact piece is arranged on the insulating plate so that the PCB board contact piece can be extended into the mounting hole.

4. The PCB socket assembly according to claim 1 or 2, characterized in that: There are more than two lower guide holes, and each lower guide hole is arranged at intervals on the socket insulator.

5. The PCB socket assembly according to claim 2, characterized in that: The PCB contact piece has a solder foot that is soldered and connected to the PCB, and the mounting structure includes a solder foot fixing hole that is arranged on the insulator for the solder foot to pass through and is interference-fitted with the solder foot.

6. The PCB socket assembly according to any one of claims 1 to 3, characterized in that: There are at least two spring sheets located on the same side plate surface of the plug-in portion, which are arranged horizontally and spaced apart in a direction parallel to the plate surface of the plug-in portion.

7. The PCB socket assembly according to claim 6, characterized in that: There are at least two rows of spring sheets on each side plate surface of the plug-in portion, which are arranged at intervals in the up-and-down direction.

8. The PCB socket assembly according to claim 7, characterized in that: The spring pieces located in the uppermost row protrude from the upper surface of the PCB board.

9. The PCB socket assembly according to claim 6, characterized in that: The PCB contact piece is composed of two parts arranged at opposite sides of the plug-in part at a relative interval, and the lower end surface of each part close to the plug-in part is provided with an arc-shaped guiding surface bent upward to guide the plug-in part to be inserted.

10. The PCB socket assembly according to claim 6, characterized in that: The spring pieces in the upper row are formed by bending upward and extending from the edges of the bottom plate corresponding to the two side surfaces of the plug-in part at the avoidance hole, and the corresponding two side edges of the bottom plate perpendicular to the board surface of the plug-in part are bent upward to form welding feet.

11. The PCB socket assembly according to any one of claims 1 to 3, characterized in that: The PCB board is a rectangular board structure, and there are two mounting holes, which are arranged at intervals along the diagonal direction of the board surface of the PCB board.

12. A connector, comprising an RU socket for fixing on an RU box and a PCB socket assembly arranged in the box, and also comprising a transfer plug for fixing in the RU box and connected to the RU socket, wherein the lower end of the PCB socket assembly is defined as a plug end, the PCB socket assembly comprises a PCB board and a PCB board contact piece welded and connected to the PCB board, the transfer plug comprises a plug insulator and a transfer contact piece arranged on the plug insulator, the transfer contact piece has a plug portion for guiding and plugging with the PCB board contact piece, and is characterized in that: The plug insulator has a floating structure for enabling the plug-in portion to be movably plugged with the PCB contact piece in a direction perpendicular to the plug-in direction. The PCB socket assembly also includes a socket insulator arranged on the lower side plate surface of the PCB board. The PCB board is provided with a contact piece mounting hole, and the PCB board contact piece is installed in the contact piece mounting hole. The plug insulator is provided with a guide column extending up and down. The socket insulator is provided with a lower guide hole which is parallel to the axis of the mounting hole and is used for guiding and plugging with the guide column on the plug insulator. The PCB board contact piece also has a spring piece for elastically pressing and fitting with the two side plates of the matching plug-in portion to achieve conduction. The PCB board contact piece includes a bottom plate, and the bottom plate is provided with an avoidance hole for the plug-in portion to pass through. The spring piece has two rows, upper and lower. The spring piece located in the lower row is formed by bending and extending the two end edges corresponding to the two side plates of the plug-in portion on the bottom plate upward, and the lower spring piece has an arc-shaped guiding surface for guiding and matching with the plug-in portion.

13. The connector according to claim 12, characterized in that: The PCB board is also provided with an upper guide hole coaxially arranged with the lower guide hole.

14. The connector according to claim 13, characterized in that: The socket insulator is an insulating plate attached to the lower surface of the PCB board, and a mounting structure for fixing the PCB board contact piece is arranged on the insulating plate so that the PCB board contact piece can be extended into the mounting hole.

15. The connector according to claim 12 or 14, characterized in that: There are more than two lower guide holes, and each lower guide hole is arranged at intervals on the socket insulator.

16. The connector according to claim 13, characterized in that: The PCB contact piece has a solder foot that is soldered and connected to the PCB, and the mounting structure includes a solder foot fixing hole that is arranged on the insulator for the solder foot to pass through and is interference-fitted with the solder foot.

17. The connector according to any one of claims 12 to 14, characterized in that: There are at least two spring sheets located on the same side plate surface of the plug-in portion, which are arranged horizontally and spaced apart in a direction parallel to the plate surface of the plug-in portion.

18. The connector according to claim 17, characterized in that: There are at least two rows of spring sheets on the same side plate surface of the plug-in portion, which are arranged at intervals in the up-and-down direction.

19. The connector according to claim 18, characterized in that: The spring pieces located in the uppermost row protrude from the upper surface of the PCB board.

20. The connector according to claim 17, characterized in that: The PCB contact piece is composed of two parts arranged at opposite sides of the plug-in part at a relative interval, and the lower end surface of each part close to the plug-in part is provided with an arc-shaped guiding surface bent upward to guide the plug-in part to be inserted.

21. The connector according to claim 17, characterized in that: The spring pieces in the upper row are formed by bending upward and extending from the edges of the bottom plate corresponding to the two side surfaces of the plug-in part at the avoidance hole, and the corresponding two side edges of the bottom plate perpendicular to the board surface of the plug-in part are bent upward to form welding feet.

22. The connector according to any one of claims 12 to 14, characterized in that: The PCB board is a rectangular board structure, and there are two mounting holes, which are arranged at intervals along the diagonal direction of the board surface of the PCB board.

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