CN115332836B

CN115332836B - High-speed BTB connector of ultra-thin type heavy current

Info

Publication number: CN115332836B
Application number: CN202211260593.6A
Authority: CN
Inventors: 李建胜; 钟欣宏; 冯奎; 孙振培
Original assignee: Atom Corp
Current assignee: Atom Corp
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2022-12-30
Anticipated expiration: 2042-10-14
Also published as: CN115332836A

Abstract

The invention discloses an ultrathin large-current high-speed BTB connector, which comprises a female end connector and a male end connector which are in plug-in fit; the female end connector comprises a female end seat, a plug-in assembly and a first connecting assembly, the plug-in assembly comprises a first contact seat body, a second contact seat body, a sliding frame and a transmission assembly, the sliding frame is provided with conductive rollers, the conductive rollers are mutually staggered, the sliding frame is provided with a first contact terminal electrically conducted with the conductive rollers, and a transmission assembly used for enabling the two sliding frames to synchronously and reversely move is further arranged in the plug-in cavity; the first contact seat body is connected with sliding blocks in a sliding mode, a flexible conductive belt is connected between the two sliding blocks and used for enabling every two corresponding conductive rollers between the two sliding frames to be electrically connected; the male end connector comprises a male end seat and a second connecting assembly; the invention has larger contact area, can greatly reduce the size in the width direction under the condition of reaching the same current-carrying capacity, has thinner width of the whole structure and is beneficial to the miniaturization of products.

Description

Ultra-thin large-current high-speed BTB connector

Technical Field

The invention relates to the technical field of connectors, in particular to an ultrathin large-current high-speed BTB connector.

Background

The high-speed board of present heavy current adopts the plane formula directly to paste electrically conductive mode to the board connector usually, under the limited use scene of thickness direction, often increases the area of contact between the contact terminal in order to satisfy the heavy current operating mode to lead to whole connector size in the width direction often great, be unfavorable for the electronic product miniaturization.

Disclosure of Invention

The invention aims to overcome the defects and provide an ultrathin large-current high-speed BTB connector.

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

an ultrathin large-current high-speed BTB connector comprises a female end connector and a male end connector which are in plug-in fit;

the female end connector comprises a female end seat, the female end seat is concavely provided with a containing groove, and a plurality of plug-in components and a plurality of first connecting components which are correspondingly plugged and matched with the plug-in components one by one are arranged in the containing groove at intervals;

each plug-in component comprises a first contact base body and a second contact base body which are slidably arranged in the containing groove, the second contact base body is fixed on the first contact base body, a plug-in cavity penetrating through the first contact base body and the second contact base body is formed between the second contact base body and the first contact base body, two sliding frames which are oppositely arranged are connected in the plug-in cavity in a sliding mode, a plurality of conductive rollers which are arranged at intervals are arranged on the inner sides of the sliding frames, the conductive rollers between the two sliding frames are arranged in a staggered mode, the sliding frames are provided with first contact terminals which correspond to the conductive rollers one by one, one ends of the first contact terminals are electrically conducted with the corresponding conductive rollers, the other ends of the first contact terminals penetrate through the sliding frames, and a transmission component used for enabling the two sliding frames to synchronously and reversely move is further arranged in the plug-in cavity; two springs which are arranged at intervals are connected between the two sliding frames;

the first contact seat body is respectively connected with sliding blocks at two sides of the plugging cavity in a sliding manner, the two sliding blocks are distributed in the diagonal direction of the first contact seat body, a flexible conductive belt is connected between the two sliding blocks, and the flexible conductive belt is used for electrically connecting every two corresponding conductive rollers between the two sliding frames;

the male end connector comprises a male end seat, and the male end seat is provided with a plurality of second connecting components which are arranged at intervals and used for being in one-to-one corresponding inserting and connecting fit with the inserting and connecting components.

The flexible conductive belt further comprises a flexible substrate made of insulating rubber, a plurality of graphene conductive layers are arranged on the flexible substrate at intervals, and each graphene conductive layer comprises a first connecting part, a second connecting part and a third connecting part; the first connecting part and the third connecting part are correspondingly arranged on two surfaces of the flexible substrate, so that the first connecting part can be coated on the outer peripheral surface of the conductive roller corresponding to the sliding frame positioned on the same side of the first connecting part, and the third connecting part can be coated on the outer peripheral surface of the conductive roller corresponding to the sliding frame positioned on the same side of the third connecting part; the second connecting portion is arranged on the side wall of the flexible substrate, and two ends of the second connecting portion are connected with the first connecting portion and the third connecting portion respectively, so that two corresponding conductive rollers between the two sliding frames are electrically conducted.

Furthermore, friction coatings for polishing and cleaning the peripheral surfaces of the conductive rollers are arranged on the two surfaces of the flexible substrate at intervals.

The transmission assembly comprises a transmission gear and two transmission racks which are both meshed with the transmission gear, the transmission gear is rotatably connected to the middle of the first contact base body, the two transmission racks are fixed at the bottoms of the two sliding frames in a one-to-one correspondence manner, the two transmission racks are distributed on two sides of the transmission gear, and the two transmission racks are in central symmetry with respect to the axis of the transmission gear.

Furthermore, each sliding frame extends inwards to form a plurality of cantilevers arranged at intervals, the cantilevers between the two sliding frames are arranged in a staggered mode, the conductive roller is rotatably connected to the free end portion of each cantilever, the positions of the first contact terminals correspond to the positions of the cantilevers one by one, and the first contact terminals are in an L shape.

Furthermore, two accommodating cavities which are positioned in the other diagonal direction of the first contact seat body are formed between the second contact seat body and the first contact seat body; each accommodating cavity is internally provided with an air bag, the outer end part of each air bag is fixedly provided with an extrusion plate, and the extrusion plates are fixedly connected with the sliding blocks positioned at the same end; two air passages which are arranged side by side at intervals are arranged in the second contact seat body corresponding to the two air bags, one end of each air passage is communicated with the corresponding air bag, the air passages are located in the middle of the second contact seat body, and a plurality of air injection holes communicated with the corresponding air passages are formed in the middle of the bottom surface of the second contact seat body and correspond to the two air passages respectively.

Furthermore, two sides of the middle part of the first contact seat body are respectively provided with two guide holes which are arranged at intervals, and the first connecting assembly and the second connecting assembly are respectively and correspondingly provided with two guide columns which are matched with the two guide holes.

Furthermore, the opening position of the guide hole is provided with a locking elastic sheet, and the peripheral wall of the guide post is correspondingly provided with a locking groove.

Further, the first connecting assembly and the second connecting assembly have the same structure, and both the first connecting assembly and the second connecting assembly include a connecting base and a plurality of second contact terminals embedded on the connecting base at intervals, and two ends of the connecting base are respectively provided with a pin terminal electrically connected with each second contact terminal.

The invention has the beneficial effects that: according to the invention, the flexible conductive belt is coated on the peripheral surface of the conductive roller, and the first contact terminals between the sliding frames at two sides are correspondingly communicated one by one, so that the first connecting assembly and the second connecting assembly are correspondingly communicated one by one.

Drawings

Fig. 1 is a schematic structural diagram of a BTB connector provided in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a female end fitting provided by an embodiment of the present invention;

FIG. 3 is an exploded view of a female end fitting provided by an embodiment of the present invention;

FIG. 4 is a schematic structural view of a connector assembly provided by an embodiment of the present invention;

FIG. 5 is an exploded view of the connector assembly provided by the present embodiment;

FIG. 6 is another exploded view of the connector assembly provided by the present invention;

FIG. 7 is a schematic structural view of a portion of the connector assembly provided by an embodiment of the present invention;

FIG. 8 is a schematic structural view from another perspective of the partial construction of the connector assembly provided by the embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a flexible conductive strip provided by an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a graphene conductive layer provided in an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a second contact base according to an embodiment of the present invention;

FIG. 12 is a schematic view of a male connector according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a first connecting assembly or a second connecting assembly provided in an embodiment of the present invention;

description of reference numerals: 1. a female end connector; 10. a female end seat; 20. a connector assembly; 30. a first connection assembly; 11. a first contact base; 111. a first groove; 112. a second groove; 113. a guide hole; 114. a locking spring sheet; 12. a second contact base; 121. an air passage; 122. a gas injection hole; 13. a carriage; 131. a cantilever; 132. a conductive roller; 133. a first contact terminal; 141. a transmission gear; 142. a drive rack; 15. a slider; 16. a flexible conductive strip; 161. a flexible substrate; 162. a graphene conductive layer; 1621. a first connection portion; 1622. a second connecting portion; 1623. a third connecting portion; 163. a friction coating; 17. an air bag; 171. a pressing plate; 18. a spring; 2. a male end connector; 21. a male end mount; 40. a second connection assembly; 101. connecting the base body; 102. a second contact terminal; 103. a pin terminal; 104. a guide post; 105. and a locking groove.

Detailed Description

The present invention will be described in further detail with reference to the drawings and specific examples, which should not be construed as limiting the scope of the invention.

As shown in fig. 1 to 13, the ultra-thin large-current high-speed BTB connector of the present embodiment includes a female terminal 1 and a male terminal 2 that are inserted and mated;

the female end connector 1 comprises a female end seat 10, wherein the female end seat 10 is concavely provided with a containing groove, and a plurality of plug-in components 20 and a plurality of first connecting components 30 which are in one-to-one corresponding plug-in fit with the plug-in components 20 are arranged in the containing groove at intervals;

each of the plug-in components 20 includes a first contact base 11 and a second contact base 12 slidably disposed in the accommodating groove, the second contact base 12 is fixed on the first contact base 11 and forms a plug-in cavity penetrating through the first contact base 11 and the second contact base 12 with the first contact base 11, two sliding frames 13 disposed opposite to each other are slidably connected in the plug-in cavity, a plurality of conductive rollers 132 disposed at intervals are disposed inside the sliding frames 13, the conductive rollers 132 between the two sliding frames 13 are staggered with each other, the sliding frames 13 are provided with first contact terminals 133 corresponding to the conductive rollers 132 one by one, one end of each first contact terminal 133 is electrically connected to the corresponding conductive roller 132, the other end of each first contact terminal 133 penetrates through the sliding frame 13, and a transmission component for enabling the two sliding frames 13 to synchronously and reversely move is further disposed in the plug-in cavity; two springs 18 which are arranged at intervals are connected between the two sliding frames 13; the spring 18 is arranged between the two sliding frames 13, so that after the male end connector 2 is pulled out, the two sliding frames 13 automatically reset for the next insertion;

the first contact seat 11 is respectively connected with sliding blocks 15 at two sides of the plugging cavity in a sliding manner, the two sliding blocks 15 are distributed in a diagonal direction of the first contact seat 11, a flexible conductive strip 16 is connected between the two sliding blocks 15, and the flexible conductive strip 16 is used for electrically connecting every two corresponding conductive rollers 132 between the two sliding frames 13;

the male terminal connector 2 comprises a male terminal base 21, and the male terminal base 21 is provided with a plurality of second connecting assemblies 40 which are arranged at intervals and are used for being in one-to-one corresponding inserting and matching with the inserting assemblies 20.

In practical use, the female terminal 1 is soldered to a first PCB to be connected, the male terminal 2 is soldered to a second PCB to be connected, and when the first PCB and the second PCB are to be connected, the male terminal 2 is inserted into the female terminal 1 from the female terminal 1, and each second connecting assembly 40 is in contact with each connector assembly 20, thereby pressing each connector assembly 20 downwards, so that each first connector assembly 30 is inserted into the insertion cavity of the connector assembly 20 in a one-to-one correspondence, the first connector assembly 30 pushes the corresponding sliding frame 13 to slide, at the same time the second connecting assembly 40 of the male terminal 2 pushes the sliding frame 13 located on the same side to slide in the plugging chamber, due to the action of the transmission assembly, the two carriages 13 move towards each other synchronously, and after each conductive roller 132 on the carriage 13 contacts the flexible conductive strip 16 in the extended state, as the carriage 13 moves further inward, the conductive rollers 132 on both sides squeeze the flexible conductive strip 16 in a wave shape in the stretched state, so that the flexible conductive strip 16 is gathered toward the center, at the same time, the flexible conductive band 16 pulls the sliding block 15 to slide inwards until the male end seat 21 is inserted in place, the first connecting assembly 30 and the second connecting assembly 40 are electrically connected to the first contact terminals 133 on the carriage 13 on the same side, respectively, the flexible conductive strip 16 is wrapped on the outer peripheral surface of each conductive roller 132, so that each two conductive rollers 132 corresponding to the two sides are electrically connected, namely, the corresponding first contact terminals 133 between the two sliding frames 13 are electrically connected, so that the first connecting assemblies 30 and the second connecting assemblies 40 are electrically connected in a one-to-one correspondence manner through the flexible conductive strips 16, the conductive rollers 132 and the first contact terminals 133 on the female terminal connector 1, and thus, the first PCB and the second PCB are butted.

This embodiment is through adopting flexible conductive band 16 cladding on the outer peripheral face of electrically conductive gyro wheel 132, with the first contact terminal 133 one-to-one switch-on between the carriage 13 of both sides to with first connecting assembly 30 and the switch-on of second connecting assembly 40 one-to-one, compare in the current planar mode and directly paste the electrically conductive mode of leaning on, area of contact is bigger, under reaching the same current-carrying capacity condition, width direction's size can be dwindled greatly, overall structure's width is thinner, does benefit to the product miniaturization.

Based on the above embodiment, further, the flexible conductive strip 16 includes a flexible substrate 161 made of insulating rubber, a plurality of graphene conductive layers 162 are spaced on the flexible substrate 161, and each graphene conductive layer 162 includes a first connection portion 1621, a second connection portion 1622, and a third connection portion 1623; the first connecting portion 1621 and the third connecting portion 1623 are correspondingly disposed on two surfaces of the flexible substrate 161, so that the first connecting portion 1621 can be wrapped on the outer circumferential surface of the corresponding conductive roller 132 on the carriage 13 located on the same side, and the third connecting portion 1623 can be wrapped on the outer circumferential surface of the corresponding conductive roller 132 on the carriage 13 located on the same side; the second connecting portion 1622 is disposed on the sidewall of the flexible substrate 161, and two ends of the second connecting portion 1622 are respectively connected to the first connecting portion 1621 and the third connecting portion 1623, so as to electrically connect the two corresponding conductive rollers 132 between the two sliding frames 13.

In this embodiment, the flexible substrate 161 has a friction coating 163 spaced apart from each other on both surfaces thereof for polishing and cleaning the outer peripheral surface of the conductive roller 132.

In practical use, the conductive rollers 132 on two sides extrude the flexible conductive band 16 to extrude the flexible conductive band 16 in a wavy state, in this process, as the flexible conductive band 16 is folded towards the middle, the flexible conductive band 16 slides along the outer circumferential surfaces of the conductive rollers 132, so that the friction coating 163 polishes and cleans the conductive rollers 132, and removes attachments (dust or other impurities) on the surfaces of the conductive rollers 132, thereby ensuring the contact resistance between the conductive rollers 132 and the graphene conductive layer 162, so as to avoid abnormal heating of the connector, after the male connector 2 is completely inserted, in the two corresponding conductive rollers 132 on two sides, the first connecting portion 1621 of the corresponding graphene conductive layer 162 is wrapped on the outer circumferential surface of the conductive roller 132 on one side, and the third connecting portion 1623 of the corresponding graphene conductive layer 162 is wrapped on the outer circumferential surface of the conductive roller 132 on the other side, so that the two corresponding conductive rollers 132 on two sides are electrically connected through the graphene conductive layer 162, so that the conductive rollers 132 and the graphene conductive layer 162 have a larger contact area than that the existing planar direct contact conduction mode, thereby satisfying a large current condition, and reducing the size of the entire plugging assembly 20 in the width direction.

As shown in fig. 8, based on the above embodiment, further, the transmission assembly includes a transmission gear 141 and two transmission racks 142 both meshed with the transmission gear 141, the transmission gear 141 is rotatably connected to the middle of the first contact base 11, the two transmission racks 142 are fixed at the bottoms of the two sliding frames 13 in a one-to-one correspondence manner, the two transmission racks 142 are distributed at both sides of the transmission gear 141, and the two transmission racks 142 are symmetrical with respect to the axis center of the transmission gear 141.

Specifically, a first groove 111 is formed in the plugging cavity, the transmission gear 141 is rotatably connected in the first groove 111, the two transmission racks 142 are both located in the first groove 111, a second groove 112 communicated with the first groove 111 is further formed in the middle of the first contact base 11, and the two sliding frames 13 are correspondingly slidably connected in the second groove 112, so that the width of the plugging assembly 20 is further reduced; in practical use, the sliding rack 13 on one side slides inwards under the pushing of the first connecting component 30, the sliding rack 13 drives the corresponding transmission rack 142 to move, so as to push the transmission gear 141 to rotate, the transmission gear 141 drives the transmission rack 142 on the other side to synchronously move in the opposite direction, and the transmission rack 142 on the other side drives the corresponding sliding rack 13 to move, so that the sliding racks 13 on the two sides synchronously move in the opposite direction under the action of the transmission component, and the conductive rollers 132 on the two sides are used for extruding the flexible conductive strip 16.

As shown in fig. 5 and fig. 7, based on the above embodiment, further, each of the carriages 13 extends inward to form a plurality of cantilevers 131 arranged at intervals, the cantilevers 131 between two of the carriages 13 are arranged to be staggered, so as to compress the flexible conductive strip 16, so that the flexible conductive strip 16 in a stretched state is formed into a wavy shape, the conductive roller 132 is rotatably connected to the free end of the cantilever 131, the positions of the first contact terminals 133 correspond to the positions of the cantilevers 131 one by one, the first contact terminals 133 are L-shaped, and the first contact terminals 133 are arranged into an L-shape, so that the first contact terminals 133 are electrically connected to the conductive roller 132 and are electrically connected to the first connecting assembly 30 or the second connecting assembly 40.

Based on the above embodiment, further, two accommodating cavities located in the other diagonal direction of the first contact seat body 11 are formed between the second contact seat body 12 and the first contact seat body 11; each accommodating cavity is internally provided with an air bag 17, the outer end part of each air bag 17 is fixedly provided with a squeezing plate 171, and the squeezing plates 171 are fixedly connected with the sliding blocks 15 positioned at the same end; two air passages 121 which are arranged side by side at intervals are arranged in the second contact seat body 12 corresponding to the two air bags 17, one end of each air passage 121 is communicated with the corresponding air bag 17, the air passages 121 are positioned in the middle of the second contact seat body 12, and a plurality of air injection holes 122 which are communicated with the corresponding air passages 121 are respectively formed in the middle of the bottom surface of the second contact seat body 12 corresponding to the two air passages 121.

Specifically, when the flexible conductive band 16 is folded inwards, the flexible conductive band 16 pulls the sliding block 15 to slide towards the center, the sliding block 15 drives the extrusion plate 171 to move to extrude the air bag 17, so that air in the air bag 17 enters the air passage 121 and is then ejected out of each air ejecting hole 122 to generate cleaning air flow, and debris generated by polishing the conductive roller 132 by the friction coating 163 is blown away from the conductive roller 132, so that the conductive roller 132 is cleaned, and abnormal heating caused by foreign matters existing between the flexible conductive band 16 and the conductive roller 132 under a high-current working condition is effectively avoided; after the male connectors 2 on the two sides are pulled out, the two air bags 17 recover to deform, the extrusion plate 171 is pushed to drive the sliding block 15 to slide outwards, and therefore the flexible conductive strips 16 are driven to recover to the stretching state from the wavy state.

Based on the above embodiment, further, two sides of the middle portion of the first contact seat 11 are respectively provided with two guide holes 113 arranged at intervals, and the first connecting assembly 30 and the second connecting assembly 40 are respectively and correspondingly provided with two guide posts 104 matched with the two guide holes 113. This embodiment is through setting up guiding hole 113 and guide post 104 cooperation to for the second coupling assembling 40 of first coupling assembling 30, male end connector 2 and the grafting cooperation of connecing the connector assembly 20 provide the direction spacing, be convenient for the grafting operation between male end connector 2 and the female end connector 1.

As shown in fig. 3 to 5, 12 and 13, based on the above embodiment, further, a locking spring 114 is disposed at an opening position of the guide hole 113, and a locking groove 105 is correspondingly disposed on an outer peripheral wall of the guide post 104. After the male end connector 2 is inserted in place, the locking elastic sheet 114 is clamped into the locking groove 105 to lock the male end connector 2, so that the male end connector 2 and the female end connector 1 are connected into a whole, the plugging reliability of the male end connector 2 and the female end connector 1 is ensured, and the male end connector 2 is not easy to loosen.

As shown in fig. 3 and 12 to 13, based on the above embodiment, further, the first connecting assembly 30 and the second connecting assembly 40 have the same structure, and both of them include a connecting base 101 and a plurality of second contact terminals 102 embedded on the connecting base 101 at intervals, and two ends of the connecting base 101 are respectively provided with a pin terminal 103 electrically connected to each second contact terminal 102; specifically, a boss matched with the plug cavity is convexly arranged on the connection base 101, each second contact terminal 102 is correspondingly embedded on the boss, the two guide posts 104 are arranged on the connection base 101 at intervals, the connection base 101 of the first connection assembly 30 is fixedly arranged at the bottom of the accommodating groove, the connection base 101 of the second connection assembly 40 is correspondingly fixedly arranged at the bottom of the male terminal base 21, so when the male terminal 2 is plugged, the boss of the second connection assembly 40 is firstly contacted with the sliding frame 13 of the plug assembly 20, the sliding frame 13 positioned above is pressed downwards, the sliding frame 13 positioned below is abutted against the boss of the first connection assembly 30, so that the boss of the first connection assembly 30 and the boss of the second connection assembly 40 extrude the two sliding frames 13 in opposite directions to synchronously move in opposite directions until the male terminal 2 is completely plugged into the female terminal 1, and therefore the corresponding first connection assembly 30 is electrically connected with the corresponding second connection assembly 40 through the plug assembly 20, and further the first PCB is electrically connected with the second PCB.

The above description is only a preferred embodiment of the present invention, and therefore, all equivalent changes or modifications of the structure, characteristics and principles described in the present patent application are included in the protection scope of the present patent application.

Claims

1. An ultrathin large-current high-speed BTB connector comprises a female end connector (1) and a male end connector (2) which are in plug-in fit; the method is characterized in that:

the female end connector (1) comprises a female end seat (10), wherein a containing groove is concavely arranged in the female end seat (10), a plurality of plug-in components (20) and a plurality of first connecting components (30) which are correspondingly in plug-in fit with the plug-in components (20) are arranged in the containing groove at intervals;

each plug-in assembly (20) comprises a first contact seat body (11) and a second contact seat body (12) which are slidably arranged in the accommodating groove, the second contact seat body (12) is fixed on the first contact seat body (11) and a plug-in cavity which penetrates through the first contact seat body (11) and the second contact seat body (12) is formed between the second contact seat body and the first contact seat body (11), two sliding frames (13) which are oppositely arranged are slidably connected in the plug-in cavity, a plurality of conductive rollers (132) which are arranged at intervals are arranged on the inner side of each sliding frame (13), the conductive rollers (132) between the two sliding frames (13) are staggered, the sliding frames (13) are provided with first contact terminals (133) which correspond to the conductive rollers (132) one by one, one end of each first contact terminal (133) is electrically conducted with the corresponding conductive roller (132), the other end of each first contact terminal (133) penetrates through each sliding frame (13), and a transmission assembly which is used for enabling the two sliding frames (13) to synchronously and reversely move is further arranged in the plug-in the inserting cavity; two springs (18) which are arranged at intervals are connected between the two sliding frames (13);

the two sliding blocks (15) are respectively connected to two sides of the insertion cavity of the first contact seat body (11) in a sliding mode, the two sliding blocks (15) are distributed in a diagonal direction of the first contact seat body (11), a flexible conductive belt (16) is connected between the two sliding blocks (15), and the flexible conductive belt (16) is used for enabling every two corresponding conductive rollers (132) between the two sliding frames (13) to be electrically connected;

the male end connector (2) comprises a male end seat (21), wherein the male end seat (21) is provided with a plurality of second connecting assemblies (40) which are arranged at intervals and used for being in one-to-one corresponding inserting and matching with the inserting assemblies (20).

2. The ultra-thin type large current high-speed BTB connector according to claim 1, wherein the flexible conductive strip (16) comprises a flexible substrate (161) made of insulating rubber, a plurality of graphene conductive layers (162) are arranged on the flexible substrate (161) at intervals, and each graphene conductive layer (162) comprises a first connecting portion (1621), a second connecting portion (1622) and a third connecting portion (1623); the first connecting part (1621) and the third connecting part (1623) are correspondingly arranged on two surfaces of the flexible substrate (161), so that the first connecting part (1621) can be coated on the outer peripheral surface of the conductive roller (132) corresponding to the sliding frame (13) on the same side with the first connecting part, and the third connecting part (1623) can be coated on the outer peripheral surface of the conductive roller (132) corresponding to the sliding frame (13) on the same side with the third connecting part; the second connecting portion (1622) is arranged on the side wall of the flexible substrate (161), and two ends of the second connecting portion (1622) are connected with the first connecting portion (1621) and the third connecting portion (1623) respectively, so that the two corresponding conductive rollers (132) between the two sliding frames (13) are electrically conducted.

3. The ultra-thin type large current high speed BTB connector according to claim 2, wherein the flexible substrate (161) is provided with a friction coating (163) on both surfaces thereof at an interval for polishing and cleaning the outer peripheral surface of the conductive roller (132).

4. The ultra-thin large-current high-speed BTB connector according to claim 1, wherein the transmission assembly comprises a transmission gear (141) and two transmission racks (142) both meshed with the transmission gear (141), the transmission gear (141) is rotatably connected to the middle of the first contact housing (11), the two transmission racks (142) are correspondingly fixed at the bottoms of the two sliding frames (13) one by one, the two transmission racks (142) are distributed at both sides of the transmission gear (141), and the two transmission racks (142) are symmetrical with respect to the axis center of the transmission gear (141).

5. An ultra-thin high current high speed BTB connector according to claim 1, wherein each of the sliding frames (13) has a plurality of cantilevers (131) extending inward and spaced apart from each other, the cantilevers (131) between the two sliding frames (13) are offset from each other, the conductive roller (132) is rotatably connected to the free end of the cantilever (131), the first contact terminals (133) are in one-to-one correspondence with the positions of the cantilevers (131), and the first contact terminals (133) are L-shaped.

6. The ultra-thin type large-current high-speed BTB connector according to claim 3, wherein two receiving cavities are formed between the second contact seat body (12) and the first contact seat body (11) and located in the other diagonal direction of the first contact seat body (11); each accommodating cavity is internally provided with an air bag (17), the outer end part of each air bag (17) is fixedly provided with an extrusion plate (171), and the extrusion plates (171) are fixedly connected with the sliding blocks (15) positioned at the same end; two air passages (121) which are arranged side by side at intervals are arranged in the second contact seat body (12) corresponding to the two air bags (17), one ends of the air passages (121) are communicated with the corresponding air bags (17), the air passages (121) are positioned in the middle of the second contact seat body (12), and a plurality of air injection holes (122) which are communicated with the corresponding air passages (121) are respectively formed in the middle of the bottom surface of the second contact seat body (12) corresponding to the two air passages (121).

7. The ultra-thin type large-current high-speed BTB connector according to claim 1, wherein two guide holes (113) are formed at two sides of the middle of the first contact holder body (11) at intervals, and the first connecting assembly (30) and the second connecting assembly (40) are respectively and correspondingly provided with two guide posts (104) matched with the two guide holes (113).

8. An ultra-thin large current high speed BTB connector according to claim 7, wherein the guiding hole (113) is provided with a locking spring (114) at the opening position, and the guiding post (104) is correspondingly provided with a locking groove (105) at the outer peripheral wall.

9. The ultra-thin type large-current high-speed BTB connector according to claim 8, wherein the first connecting assembly (30) and the second connecting assembly (40) have the same structure, and both comprise a connecting base (101) and a plurality of second contact terminals (102) embedded in the connecting base (101) at intervals, and two ends of the connecting base (101) are respectively provided with a pin terminal (103) electrically connected with each second contact terminal (102).