CN113193428B

CN113193428B - BTB plug, BTB socket and BTB connector

Info

Publication number: CN113193428B
Application number: CN202110546342.3A
Authority: CN
Inventors: 田旭; 许蔚; 刘向阳; 李立新; 张志中; 李卫可; 韩云钊; 武学顺; 徐耕; 王恒; 习冰寒; 闫丰献
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2025-08-05
Anticipated expiration: 2041-05-19
Also published as: CN113193428A

Abstract

The present invention relates to a BTB plug, a BTB socket, and a BTB connector. The BTB connector includes a BTB plug and a BTB socket. The BTB plug has plug terminals on both sides of its plug housing, extending in the mating direction. The BTB socket includes a socket housing with an open interior at both ends. The socket terminals assembled within the socket housing form a hollow cavity into which the BTB plug is inserted. When the connector is mated, the plug terminals can contact and conduct with the socket terminals at any location along their axially extending contact areas. This allows the connector to meet floating requirements for printed circuit boards of varying heights through axial relative sliding between the BTB plug and the BTB socket. The BTB plug and BTB socket of the present invention can achieve axial floating connections between printed circuit boards of varying heights, reducing the number of product development options and saving development costs and cycles.

Description

BTB plug, BTB socket and BTB connector

Technical Field

The invention belongs to the technical field of connectors, and particularly relates to a BTB plug, a BTB socket and a BTB connector.

Background

In order to realize conductive connection between printed boards with different heights, the existing design realizes conductive connection by developing various headstocks with different heights to match. When the conductive connection between different printed boards is realized through the plugs or the sockets with different heights, the product types are various, and the development cost is high.

Disclosure of Invention

In order to realize the conduction connection between the printed boards with different heights, the invention designs the BTB with a novel structure, so that the BTB adapts to different board-to-board distances through the axial floating between the plug and the socket.

The aim and the technical problems of the invention are realized by adopting the following technical proposal. According to the BTB connector provided by the invention, the BTB connector comprises the BTB plug and the BTB socket, the plug terminals extending in the plugging direction are arranged on two sides of the plug shell of the BTB plug, the BTB socket comprises the socket shell with the inner cavities with the two open ends, the socket terminals arranged in the socket shell form a hollow cavity for the insertion of the BTB plug, and when the connector is plugged, any position of a contact area of the plug terminals extending along the axial direction can be contacted and conducted with the socket terminals, so that the connector can meet the floating requirements of different heights between printed boards through the axial relative sliding of the BTB plug and the BTB socket.

The aim and the technical problems of the invention can be further realized by adopting the following technical measures.

In the BTB connector, the socket housing of the BTB socket has no independent terminal accommodating cavity, and the socket terminals are fixedly assembled on the side wall of the cavity of the socket housing.

In the BTB connector, the terminal of the socket terminal in the BTB socket is bent and then connected with the second printed board sleeved outside the socket shell, so that the BTB socket can realize the requirement of large floating between boards by inserting the BTB plug with the forward end or the reverse end of the front end.

In the BTB connector, the tail of the socket housing is turned outwards to form a turned edge, and the tail end of the socket terminal is bent, then penetrates through the terminal pin through hole on the turned edge, and is connected with the second printed board fixed on the turned edge.

The BTB connector described above, wherein the BTB plug and the BTB socket have a guide structure therebetween for guiding insertion when the socket is inserted in the forward direction or the reverse direction.

The BTB connector described above, wherein the guiding structure includes an adapted guiding post and guiding groove on the plug housing and the socket housing, respectively, and guiding chamfers on the front end of the plug housing and the front and rear ends of the cavity of the socket housing, respectively.

In the BTB connector, the plug terminal is an integral U-shaped terminal, a two-piece monolithic terminal or a PCB board terminal having a plurality of contact areas.

In the BTB connector, the plug housing is provided with a terminal assembly groove for inserting and assembling the plug terminal.

In the BTB connector, at least one contact for contacting and conducting with the plug contact area is arranged above the BTB socket terminal, a supporting part for fixedly assembling with the socket shell is arranged below the BTB socket terminal, and a bending part for turning the socket shell outwards and a socket terminal pin for connecting with the second printed board are arranged at the tail part of the BTB socket terminal.

The BTB connector described above, wherein the plug terminal and the receptacle terminal each include at least one of a power terminal and a signal terminal.

The aim and the technical problems of the invention are also realized by adopting the following technical proposal. According to the invention, the BTB plug is provided.

The aim and the technical problems of the invention are achieved by adopting the following technical proposal. According to the present invention, a BTB socket is provided.

Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the invention can achieve quite technical progress and practicability, has wide industrial application value, and has at least the following advantages:

The BTB plug and the BTB socket can meet the connection between printed boards with different board heights through axial floating, and the same BTB socket can be oppositely inserted with the existing BTB plug by 180 degrees, so that the requirement of the high floating between the printed boards in a larger range is met, the development types of products are reduced, and the development cost and the development period are saved. The floating amount of the connector is larger than the height of the socket.

Drawings

Fig. 1 is a schematic diagram of a plug structure of a BTB connector according to embodiment 1 of the present invention;

FIG. 2 is an exploded view of a plug of a BTB connector according to embodiment 1 of the present invention;

Fig. 3 is a schematic diagram showing pre-connection between a plug and a printed board of the BTB connector according to embodiment 1 of the present invention;

Fig. 4 is a schematic diagram illustrating pre-connection between a BTB connector receptacle and a printed board according to embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of a BTB connector receptacle according to embodiment 1 of the present invention;

FIG. 6 is an exploded view of a BTB connector receptacle of embodiment 1 of the present invention;

FIG. 7 is a schematic diagram of the BTB connector header of embodiment 1 of the present invention mated in the forward direction to meet the large inter-board spacing;

FIG. 8 is a schematic diagram of the BTB connector header of embodiment 1 of the present invention mated in the forward direction to meet the small inter-board spacing;

FIG. 9 is a schematic diagram of the BTB connector header of embodiment 1 of the present invention mated in reverse to meet a large inter-board spacing;

FIG. 10 is a schematic view showing the back-fitting of the BTB connector header to meet the small inter-board spacing of embodiment 1 of the present invention;

FIG. 11 is a schematic perspective view showing the fitting of the BTB connector header according to embodiment 1 of the present invention;

FIG. 12 is a schematic bottom view of a BTB connector receptacle according to embodiment 1 of the present invention;

fig. 13 is a schematic view of a power terminal structure of a socket according to embodiment 1 of the present invention;

fig. 14 is a schematic diagram of a signal terminal structure of a socket according to embodiment 1 of the present invention;

fig. 15 is a schematic view of a plug terminal of a BTB connector according to embodiment 1 of the present invention;

fig. 16 is a schematic view of another plug terminal of the BTB connector according to embodiment 1 of the present invention;

Fig. 17 is a schematic diagram of another plug structure of the BTB connector according to embodiment 1 of the present invention;

FIG. 18 is a partially exploded view of FIG. 17;

Fig. 19 is a schematic diagram of a plug structure of a BTB connector according to embodiment 2 of the present invention;

FIG. 20 is another view of a BTB connector plug of embodiment 2 of the present invention;

FIG. 21 is an exploded view of a BTB connector plug of embodiment 2 of the present invention;

Fig. 22 is a schematic diagram illustrating pre-connection between a BTB connector plug and a printed board according to embodiment 2 of the present invention;

Fig. 23 is a schematic diagram of a BTB connector receptacle according to embodiment 2 of the present invention;

fig. 24 is a schematic diagram showing pre-connection between a BTB connector receptacle and a printed board according to embodiment 2 of the present invention;

FIG. 25 is an exploded view of a BTB connector receptacle of embodiment 2 of the present invention;

FIG. 26 is a schematic reverse view of a BTB connector receptacle of embodiment 2 of the present invention;

Fig. 27 is a schematic view showing the structure of a power terminal of a BTB connector receptacle according to embodiment 2 of the present invention;

fig. 28 is a schematic diagram of the signal terminal structure of a BTB connector receptacle according to embodiment 2 of the present invention;

FIG. 29 is a schematic view of a BTB connector according to embodiment 2 of the present invention, which is inserted in the forward direction to meet the large pitch between boards;

FIG. 30 is a schematic diagram of a BTB connector of embodiment 2 of the present invention that is positively mated to meet a small inter-board spacing;

Fig. 31 is a schematic perspective view of a BTB connector according to embodiment 2 of the present invention.

[ Main element symbols description ]

1:BTB plug

2:BTB socket

3 First PCB board

4 Second PCB board

5 Plug terminal

51 Plug signal terminal

52 Plug power supply terminal

53 Contact area

54:PCB board terminal

55 Two-body monolithic terminal

56U-shaped terminal

57 Plug terminal pin

6 Socket terminal

61 Socket signal terminal

611 Signal contact

612 Signal fixing part

613 Signal bending position

62 Socket power terminal

621 Power contact

622 Power supply fixing part

623 Power supply bending position

63 Socket terminal pin

7 Plug shell

71 Terminal assembly groove

72 Limit part

73 Guide groove

74 Spacing projections

75 Chimeric body

8 Socket shell

81 Intermediate cavity

82 Side wall

83 Turning edge

84 Terminal pin through hole

85 Guide post

86 Guide chamfer

87 Tabling cavity

88 Radiating groove

Detailed Description

In order to further describe the technical means and effects adopted by the present invention to achieve the preset purpose, the following detailed description will refer to the specific implementation, structure, features and effects of the BTB connector according to the present invention with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1-19, which are schematic structural views of parts of a BTB connector according to embodiment 1 of the present invention, the connector includes a BTB plug 1 and a BTB socket 2, wherein the BTB plug 1 includes a plug housing 7, an outer side of the plug housing 7 is provided with a plug terminal 5 extending in an axial direction, and the plug terminal 5 includes a contact area 53 positioned and assembled on an outer side of the plug housing 7, and a plug terminal pin 57 extending from a tail portion of the plug housing 7 for mating connection with the first printed board 3. The contact area 53 of the plug terminal 5 of the BTB plug 1 realizes contact conduction with the socket terminal 6 in the BTB socket 3, and the contact area 53 is a long section extending along the axial direction, so that the BTB plug 1 can float in a large range along the axial direction relative to the BTB socket 3, thereby meeting the connection requirement between printed boards in a larger range of spacing.

The plug housing 7 of the BTB plug 1 of the present invention is a fixed body, and plug terminals 5 are provided on both sides of the fixed body, and the terminal contact areas 53 are exposed to achieve contact conduction with the socket-end contacts.

In the embodiment of the invention, adjacent plug terminals 5 are separated by a positioning wall 74 on the side wall of the plug housing 7, which is higher than the surface of the plug terminal 5, and a terminal assembly groove 71 for the plug terminal 5 to be inserted in an adapting way is formed between the adjacent positioning walls 74, wherein the terminal assembly groove 71 can at least realize the limit of the plug terminal in the horizontal direction, thereby realizing the positioning assembly between the plug terminal 5 and the plug housing 7.

According to the plug disclosed by the invention, different plug terminal structures are assembled according to the structure of the plug shell 7, so that the assembly difficulty and the processing difficulty are reduced, the assembly efficiency is improved, and the processing and assembly cost is saved.

In an embodiment of the present invention, the plug terminal 5 is an integral U-shaped terminal 56, two vertical portions of the U-shaped terminal 56 are respectively located in the terminal assembling grooves 71 on two sides of the plug housing 7, and the bending portions connecting the two vertical portions are in limit fit with the front end face of the plug housing 7. Preferably, the adjacent bending parts are also separated by a positioning wall 74 protruding on the front end surface of the plug housing 1, and a groove formed between the adjacent positioning walls 74 on the front end surface of the plug housing 1 can limit the bending parts of the U-shaped terminals 56.

In another embodiment of the present invention, the plug terminal 5 is a two-piece terminal 56, the two-piece terminal 56 is guided and assembled in terminal assembling grooves 71 on two sides of the plug housing 7, and the positioning walls 74 on two sides of the terminal assembling grooves 71 realize the limitation in the horizontal direction. Preferably, two sides of the two-piece terminal 56 are further provided with positioning protrusions 562 for being in stop fit with the positioning protrusions on two sides of the terminal assembly groove 71, so as to realize positioning in the vertical direction. The two-piece terminals 56 are each provided with a pin structure at the bottom and a contact area above. The front end of the two-piece terminal 56 preferably further has a folded portion 561 for being engaged with and limited by the front end of the terminal fitting groove 71, but is not limited thereto.

In yet another embodiment of the present invention, the plug terminal 5 is a PCB board contact end 54, and the PCB board contact end 54 is a PCB board provided with a plurality of contact areas 53, and a plug terminal pin 57 is connected to the bottom of the corresponding contact area 53 of the PCB board.

In a further embodiment of the present invention, the plug terminal 5 includes at least two of an integral U-shaped terminal, a two-piece monolithic terminal and a PCB board contact terminal, i.e. in this embodiment, the plug terminal 5 on the plug is composed of at least two structural types of terminals.

The plug terminal 5 is connected with the first printed board 3 through the plug terminal pin 57, and in order to enhance the plug stability of the plug terminal pin 57, the tail part of the plug housing 7 is further provided with a limiting part 72 for sealing the terminal assembly groove 71 and enhancing the horizontal limit of the terminal 5, and the limiting part 72 is matched with the positioning wall 74 to form a cavity for accommodating the plug terminal. In the embodiment of the present invention, the limiting portion 72 protrudes from the positioning wall 74, but is not limited thereto.

In the embodiment of the present invention, the plug terminal 5 includes a plug power terminal 52 and a plug signal terminal 51, where the plug power terminal 52 and the plug signal terminal 51 are both assembled on two sides of the plug housing 7, and in use, the power terminal 52 and the signal terminal 51 are connected to the first printed board 3 through a terminal pin 57 at the bottom, and the upper contact area 53 contacts with the socket contact area, so as to implement conductive connection.

The BTB socket 2 comprises a socket housing 8 and socket terminals 6 assembled in the socket housing 8, the socket housing 8 is provided with cavities which are free to open at two ends and extend along the axial direction, the socket terminals 6 are symmetrically distributed at two sides of the cavities, and the opposite distributed socket terminals 6 form an intermediate cavity 81 for inserting the BTB plug 1 and contacting and conducting with the contact area of the terminal at the outer side of the plug. The tail of the socket housing 8 is turned outwards to form a turning edge 83, terminal pin through holes 84 for the socket terminal pins 63 of the socket terminal 6 to pass through are formed in the turning edge 83, and the socket terminal pins 63 fixed at the tail of the socket terminal 6 in the socket housing 8 extend out of the socket housing 8 from the terminal pin through holes 84 and are connected with the second printed board 4 fixedly assembled on the turning edge 83. In the embodiment of the invention, the second printed board 4 is sleeved on the periphery of the socket shell 8 through a through hole in the middle of the second printed board for the front end of the socket shell 8 to pass through, and is blocked and limited with the turning edge 83 at the tail of the socket shell 8.

In the embodiment of the present invention, the socket housing 8 has no independent socket terminal receiving cavity, and the socket terminals 6 are disposed on the side walls 82.

Due to the design of the structure, the BTB socket 2 of the present invention realizes the connector of the front end or the rear end of the BTB socket 2 and the front end of the BTB plug 1 by plugging. A guiding structure for guiding the two in a plugging manner is arranged between the BTB socket 2 and the BTB plug 1, and the guiding structure is preferably an adaptive guiding column 85 and guiding groove 73 structure. In the embodiment of the invention, the guide posts 85 are columnar protrusions located at two ends of the middle cavity 81 and extend to front and rear end surfaces of the socket shell along the axial direction of the socket, the guide grooves 73 are groove structures located at two ends of the plug shell 7 and extend along the axial direction, and when the connector is inserted, no matter the plug is inserted into the front end or the tail end of the socket (the socket is inserted into the front end or the tail end of the socket), the guide posts and the guide grooves are matched in a guiding way to realize the proper insertion of the plug and the socket. Preferably, the front end and the rear end face of the plug housing are respectively provided with a guide chamfer 86 for guiding and matching with the chamfer of the front end of the plug housing.

When the BTB plug is matched with the BTB socket, the BTB plug passes through the middle cavity of the BTB socket and the second PCB to realize up-and-down sliding, so that the requirement of large floating at different heights among the printed boards can be met. Fig. 7 and 8 are schematic connector assembly diagrams during forward mating of a plug and a socket, where the socket can slide up and down on the plug to meet any inter-board height requirement, and can meet an extremely low board spacing H2 requirement. The BTB socket can be reversely matched with the plug after being horizontally turned 180 degrees, and the socket can still slide up and down on the plug to meet the height requirement between any boards, as shown in fig. 9 and 10. The connector can be inserted with the existing BTB plug through the same BTB socket reversely by 180 degrees, so that the height H3 between printed boards in a larger range is realized, the development variety of products is reduced, and the development cost and the development period are saved.

The front end opening width of the plug shell is smaller than the rear end leaning opening width, so that the assembly of the socket terminal is facilitated, the limit part 72 on the plug shell can enter the socket shell to meet the extremely low plate spacing H2 requirement when the socket is inserted in the forward direction, the limit part 72 on the plug shell cannot enter the socket shell when the socket is inserted in the forward direction, the minimum plate spacing which can be realized by the limit part is only H4, and the plate spacing requirement which is smaller than H4 can be realized when the limit part 72 is not arranged on the plug shell when the socket is inserted in the reverse direction.

The upper part of the socket terminal 6 is provided with at least one contact area for contacting and conducting with the plug terminal 5, the lower part is provided with a supporting part for fixedly assembling with the socket shell 8 and supporting the contact area, and the bottom part is provided with a bending part for extending the tail part of the terminal towards the flanging 83 and leading the socket terminal pin 63 to extend out from the terminal pin perforation on the flanging.

In the embodiment of the present invention, the socket terminal 6 includes a socket signal terminal 61 and a socket power terminal 62, the socket signal terminal 61 includes, from front to back, a contact area, a signal fixing portion 612, a signal bending portion 613, and a socket terminal pin 63, where the contact area is provided with at least one signal contact 611. The socket power terminal 62 sequentially comprises a contact area, a power fixing part 622, a power bending part 623 and a socket terminal pin 63 from front to back, wherein the contact area is provided with at least one power contact 621. When the BTB plug 1 is used, the BTB plug 1 is connected with a first printed board through a power supply and a bottom pin of a signal terminal, then a contact area at the upper part of the terminal is contacted with a contact area of a socket power supply terminal and the signal terminal, conduction between the headstock is realized, and the bottom pin of the socket power supply terminal and the signal terminal is connected with a second printed board connector, so that a conduction connector between the two printed boards is finally realized.

Referring to fig. 19-31, which are schematic views of the structure of each part of the BTB connector of embodiment 2 of the present invention, the plug 1 of the present invention is a fixed body, two sides of the fixed body are provided with contact terminals, and the contact areas of the terminals are exposed. The receptacle 2 has a mating cavity open at both ends so that forward and reverse mating with the plug 1 can be achieved.

In this embodiment, the socket terminals 6 in the BTB socket 2 are not bent any more, but are arranged vertically and vertically, the socket terminal pins 63 of the socket terminals 6 extend from the tail of the socket 2 and are connected with the second printed board 4 fixed on the end face of the tail of the socket, that is, in this embodiment, the PCB board of the socket is arranged below the socket, and in order to achieve forward and reverse insertion of the plug 1 and the socket 2, the second printed board 4 fixed on the end face of the tail of the socket is provided with a through slot 41 corresponding to the middle cavity 81 formed by the socket terminals in the socket 2 and through which the plug 1 passes.

In this embodiment, since the socket terminals 6 are vertically disposed, the second printed board 4 is located on the end face of the tail portion of the socket, and the tail portion of the socket housing 8 may not be provided with the turnover edge 83, so that the area occupied by the socket 2 becomes small, which is convenient for miniaturization. The socket housing 8 of the present invention can also be combined with the second printed board 4 more firmly by providing the turnover edge 83 at the tail.

In this embodiment, in order to limit the minimum inter-plate distance between the plug 1 and the socket 2 when they are plugged in, the plug 1 is further provided with a fitting body 75 on both sides of the plug housing, and the socket housing 8 is further provided with fitting cavities 87 adapted thereto on both sides. When the plug and the socket are inserted positively, the axial relative movement of the plug and the socket can enable the jogged body 75 and the jogged cavity 87 to be in concave-convex fit to achieve the minimum plate-to-plate distance, namely when the plug is matched with the socket, the socket can slide up and down on the plug to meet the height requirement between any plates, and when the minimum height h is reached, the jogged body of the plug shell is matched with the jogged cavity of the socket shell. When the plug and the socket are reversely plugged, the plug end jogging body and the second printed board 4 can be matched with each other in a blocking way through the axial relative movement of the plug and the socket, so that the minimum inter-board distance is realized. The concave-convex fit jogged body 75 and the jogged cavity 87 enable the fit of the headstock to be more stable and not easy to shake. According to the invention, only one BTB plug 1 and one BTB socket 2 are needed, and the lower printed board matching height can be realized by arranging the embedded cavity 75 and the embedded body 87, so that the range of the matching height of the plug and the socket is increased, the development of the variety of products is reduced compared with the prior art, the size of the product is reduced, and the development cost and the development period of the product are reduced.

Preferably, the jogged bodies 75 are arranged at two sides of the tail part of the plug housing 1, and are fixedly connected with the first printed board 3 when the plug 1 is connected with the first printed board 3, so that the jogged bodies 75 protruding laterally from the side wall of the plug housing 7 also play a role in increasing the combination stability of the plug 1 and the pcb, and further, 4 jogged bodies 75 are arranged at 4 corners of the plug respectively, so that the contact stability of the plug and the pcb is increased. The BTB plug end jogging body 75 is arranged, so that the whole plug is more stable when placed on a printed board, the whole plug is not easy to topple, and as the jogging body protrudes out of two sides of the socket shell, more terminal contact matching areas are reserved in the middle.

In order to facilitate the connection and fixation of the jogging body 75 and the first printed board 3, at least one guide pin is further provided on the jogging body 75.

While the tail portion of the socket housing is still provided with the turnup 83, the engaging cavity is fully or partially provided on the turnup 83, but is not limited thereto.

When the socket is used, the power terminal 62 and the signal terminal 61 of the socket 2 are connected with the second printed board 4 through the bottom pins, the upper contact areas of the power terminal 62 and the signal terminal 61 are in contact with the contact areas of the plug 1, so that conductive connection is realized, meanwhile, due to the existence of four embedded cavities, four embedded bodies of the plug can be inserted into the embedded cavities, and the lower matching height of the plug and the socket can be realized.

The BTB connector comprises a BTB plug 1 and a socket 2 which are respectively connected with a printed board through pins at the bottoms of power supply and signal terminals, a second step of guiding and plugging through guiding posts 85 at the left and right ends of the BTB socket 2 and guiding grooves 73 at the left and right ends of the plug 1, a third step of enabling the upper power supply and signal contact areas of the plug terminal 5 to be in contact with the contact areas of the socket power supply terminal 62 and the signal terminal 61 along with continuous guiding and matching of the plug 1 and the socket 2 to realize conduction between the headstocks, and a fourth step of enabling the plug to be further plugged in order to realize lower matching height between the printed boards, and finally enabling four jogged bodies 75 of the plug to be matched with four jogged cavities 87 of a socket shell to realize lower matching height between the printed boards.

In order to increase the heat dissipation efficiency of the socket, the two side walls of the socket housing 8 of the present invention are further provided with heat dissipation grooves 88 for enhancing heat dissipation, preferably, the heat dissipation grooves are U-shaped through grooves.

In this embodiment, there is no separate receptacle terminal 6 receiving cavity on the receptacle housing 8, and the receptacle terminals 6 are disposed on the side walls 82. The socket terminal 6 has any number of contact points provided above and a fixing portion and a terminal pin 63 provided below for fixing to the side wall 82.

The socket terminals 6 and the plug terminals 5 of the present invention may be mixed with any number of power terminals and signal terminals, may be mounted with any number of power terminals, or may be mounted with any number of signal terminals.

The pins arranged at the bottoms of the power supply and signal terminals of the BTB plug 1 and the BTB socket 2 of the present invention may be in the forms of welding, crimping, sticking, etc., but are not limited to the above three forms.

The present invention is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present invention can be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. A BTB connector comprises a BTB plug and a BTB socket, and is characterized in that plug terminals extending along the plugging direction are arranged on two sides of a plug shell of the BTB plug, the BTB socket comprises a socket shell with inner cavities with two open ends, the socket terminals arranged in the socket shell form a hollow cavity for the insertion of the BTB plug from the front end or the rear end, when the connector is plugged in, any position of a contact area extending along the axial direction of the plug terminals can be in contact conduction with the socket terminals, so that the connector can meet the floating requirements of different heights between printed boards through the axial relative sliding of the BTB plug and the BTB socket, the tail ends of the socket terminals are connected with second printed boards fixed on the socket shell, through grooves are formed in positions corresponding to the hollow cavity on the socket shell, so that the BTB plug can be plugged into the hollow cavity of the BTB socket from the front end or the rear end, and the tail ends of the socket terminals in the BTB socket are connected with second printed boards sleeved on the outer side of the socket shell after being bent, and the tail ends of the BTB socket can meet the floating requirements of the BTB plug from the front end or the rear end to the BTB socket.

2. The BTB connector of claim 1, wherein the tail of the receptacle housing is folded outwardly to form a flange, and the terminal ends of the receptacle are folded to pass through terminal pin openings in the flange and connect with a second printed board secured to the flange.

3. The BTB connector of claim 1, wherein at least one contact point for contact conduction with the BTB plug contact area is provided above the socket terminal, a support part for fixing and assembling with the socket housing is provided below the socket terminal, and a bending part for turning out the socket housing and a socket terminal pin for connecting with the second printed board are provided at the tail part.

4. The BTB connector of claim 1, wherein the plug housing of the BTB plug is provided with a fitting body, the socket housing is provided with a fitting cavity, and the BTB plug and the BTB socket are defined by a minimum plate pitch at the time of forward insertion by the fitting of the fitting body and the fitting cavity.

5. The BTB connector of claim 4, wherein the fitting is located at a coupling end of the plug housing and the first printed board, and the fitting is capable of enhancing stable connection between the BTB plug and the first printed board by coupling with the first printed board.

6. The BTB connector of claim 4, wherein the tail of the receptacle housing is folded outwardly to form a ledge for enhancing the connection between the BTB receptacle and the second printed board, the chime being located at least partially on the ledge.

7. The BTB connector of any one of claims 1-6, wherein the receptacle housing of the BTB receptacle is devoid of a separate terminal receiving cavity, the receptacle terminals being fixedly mounted to side walls of the receptacle housing cavity.

8. The BTB connector of any one of claims 1-6, wherein the BTB plug and the BTB receptacle have a guiding structure therebetween for guiding the insertion of the BTB receptacle when the BTB receptacle is inserted in the forward direction or the reverse direction.

9. The BTB connector of claim 8, wherein the guide structure includes mating guide posts and guide slots on the plug housing and the receptacle housing, respectively, and guide chamfers on the front end of the plug housing and the front and rear ends of the receptacle housing cavity, respectively.

10. The BTB connector of any of claims 1-6, wherein the plug terminal comprises at least one of a unitary U-shaped terminal, a two-piece, monolithic terminal, and a PCB board terminal having a plurality of contact areas.

11. A BTB plug, characterized in that it is a BTB plug according to any one of claims 1-10.

12. A BTB socket, characterized in that it is a BTB socket according to any one of claims 1-10.