CN108400455B

CN108400455B - Electric connection device and board-to-board electric connection combination

Info

Publication number: CN108400455B
Application number: CN201710067619.8A
Authority: CN
Inventors: 保罗·琳赛·瑞区沃兹; 吴云山; 朱章添
Original assignee: Molex LLC
Current assignee: Molex LLC
Priority date: 2017-02-07
Filing date: 2017-02-07
Publication date: 2020-08-21
Anticipated expiration: 2037-02-07
Also published as: CN108400455A

Abstract

The invention provides an electric connecting device and a board-to-board electric connecting combination. The electric connection device comprises a supporting frame and a switching circuit board, wherein the supporting frame is provided with a top part and a bottom part. The adapter circuit board comprises an upper end part fixed on the top of the support frame, a lower end part fixed on the bottom of the support frame and a side part positioned between the upper end part and the lower end part, wherein the upper end part comprises a first connector, and the lower end part comprises a second connector. The first circuit board is provided with a first butting connector for butting with the first connector. The second circuit board is provided with a second butting connector for butting with the second connector. The electric connection device and the board-to-board electric connection combination are more stable and reliable in structure and electric connection, and are suitable for high-speed multi-signal transmission.

Description

Electric connection device and board-to-board electric connection combination

Technical Field

The present invention relates to an electrical connector, and more particularly to an electrical connector and a board-to-board electrical connector assembly.

Background

For example, the connection system disclosed in US 6,520,789 is a technique for connecting two circuit boards by using a flexible circuit board, and the way for fixing the end of the flexible circuit board to the circuit board is disclosed in the publication, in which one end of the flexible circuit board and the circuit board are pressed between inner and outer pressing blocks, so as to maintain the electrical connection between the flexible circuit board and the circuit board.

Another technique for connecting a flexible printed circuit board to a circuit board is disclosed in U.S. Pat. No. US 7,014,475, in which a circuit board is respectively soldered to two ends of a flexible printed circuit board, so that another circuit board can be inserted between the two ends of the flexible printed circuit board to form an electrical connection.

Disclosure of Invention

Therefore, one of the objectives of the present invention is to provide an electrical connection device and a board-to-board electrical connection assembly, which are more stable and reliable in structure and electrical connection and suitable for high-speed multi-signal transmission.

Another object of the present invention is to provide an electrical connection device and a board-to-board electrical connection assembly which are easy to assemble, easy to manufacture and cost effective.

The electrical connection device comprises a support frame having a top and a bottom and an adapter circuit board, including an upper end fixed on the top of the support frame, a lower end fixed on the bottom of the support frame, and a side part between the upper end and the lower end, wherein the upper end comprises a first connector, and the lower end comprises a second connector.

In some embodiments, the support frame includes two combined frames, and the two combined frames define an upper holding structure and a lower holding structure, the upper holding structure provides an upper end portion holding the adapting circuit board; the lower holding structure is used for holding the lower end part of the adapter circuit board.

In some embodiments, the support frame includes two combined frame bodies, the two combined frame bodies have the same structure, each frame body includes an outer frame portion and two side walls connecting the outer frame portion, a top frame portion and a bottom frame portion, when the two combined frame bodies are combined, the top frame portions of the two combined frame bodies cooperate to define the top of the support frame, the bottom frame portions of the two combined frame bodies cooperate to define the bottom of the support frame, and the two combined frame bodies define an upper holding structure at the top of the support frame and a lower holding structure at the bottom of the support frame, the upper holding structure provides an upper end portion for holding the adapting circuit board; the lower holding structure is used for holding the lower end part of the adapter circuit board.

In some embodiments, one of the upper holding structure and the first connector comprises a holding rail, the other comprises a holding groove rail for embedding the holding rail, and the first connector is held on the upper holding structure by embedding the holding rail into the holding groove rail; one of the lower holding structure and the second connector includes a holding rail, the other includes a holding groove rail into which the holding rail is inserted, and the second connector is held by the lower holding structure by the holding rail being inserted into the holding groove rail.

In some embodiments, the top frame portion and the bottom frame portion are respectively formed with a concave notch, when the two frame bodies are combined, the notches of the two top frame portions define an upper opening for exposing the first connector, the notches of the two bottom frame portions define a lower opening for exposing the second connector, the holding convex rails of the upper holding structure are arranged in pairs at two inner side edges of the notch of the top frame portion, the holding convex rails of the lower holding structure are arranged in pairs at two inner side edges of the notch of the bottom frame portion, and the holding concave rails are arranged in pairs at two opposite side edges of each of the first connector and the second connector. In some embodiments, the upper retaining formation further comprises a stop disposed on the retaining ledge, said stop providing abutment of the first connector; the lower holding structure also comprises a stop block arranged on the holding convex rail, and the stop block provides the second connector for abutting.

In some embodiments, the upper holding structure further comprises upper support blocks respectively disposed on the two frames for supporting the first connector back portion, and the lower holding structure further comprises lower support blocks respectively disposed on the two frames for supporting the second connector back portion.

In some embodiments, the upper holding structure further includes at least one stopper formed on each of the two frames, and when the upper end of the adapting circuit board is held on the top of the supporting frame, the upper end of the adapting circuit board is between the stopper and the upper supporting block.

In some embodiments, the upper end portion of the adapting circuit board further includes an upper stiffener for supporting the first connector, the lower end portion of the adapting circuit board further includes a lower stiffener for supporting the second connector, and the upper stiffener and the first connector are respectively disposed on two opposite surfaces of the upper end portion of the adapting circuit board; the lower reinforcing plate and the second connector are respectively arranged on two opposite surfaces of the lower end part of the adapter circuit board.

In some embodiments, the supporting frame further includes fastening structures respectively disposed on the two frame bodies to enable the two frame bodies to be fastened together, and the fastening structures include fastening elements respectively disposed on one of the frame bodies and complementary fastening elements disposed on the other frame body and capable of being fastened to the fastening elements.

In some embodiments, each frame body has a hollow frame-shaped structure.

In some embodiments, the adapting circuit board is a flexible circuit board, each side wall is formed with an upper half through groove close to the top frame portion and a lower half through groove close to the bottom frame portion, when the two frames are combined, the upper half through grooves of the two frames are communicated to form a through groove, the lower half through grooves of the two frames are communicated to form a through groove, and the two through grooves provide two ends of the adapting circuit board to penetrate through.

In some embodiments, each frame further includes two limiting pieces extending outward from the two side walls and having an L-shaped cross section, and when the two frames are combined, ends of the two limiting pieces face each other to limit the side portion of the adapting circuit board between the two limiting pieces.

The board-to-board electrical connection assembly of the present invention comprises the electrical connection device, a first circuit board, a first mating connector for mating with the first connector, a second circuit board, and a second mating connector for mating with the second connector.

In some embodiments, each frame further includes a positioning post protruding downward from the bottom frame, and the second circuit board is provided with two positioning holes, and when the second connector is mated with the second mating connector, the positioning posts of the two frames are inserted into the two positioning holes.

In some embodiments, the board-to-board electrical connection assembly further comprises two support posts disposed between the first circuit board and the second circuit board.

In some embodiments, the first connector is identical in structure to the first mating connector and the second connector is identical in structure to the second mating connector.

In some embodiments, the first connector and the first mating connector are Mezzanine connectors (Mezzanine connectors), and the second connector and the second mating connector are Mezzanine connectors (Mezzanine connectors).

In some embodiments, the board-to-board electrical connection assembly further includes a locking member for locking the top of the supporting frame with the upper end of the adapting circuit board and the first circuit board, and the top of the supporting frame, the upper end of the adapting circuit board and the first circuit board are respectively provided with a locking hole for the locking member to pass through and lock.

The electric connection device and the board-to-board electric connection combination are respectively fixed at the top and the bottom of the support frame by the upper end part and the lower end part of the switching circuit board, and then the first connector and the second connector are butted with the first butting connector and the second butting connector of the circuit board, so that better electric contact can be maintained, and the support frame provides a better support structure for the switching circuit board, so that the structure and the electric connection are more stable and more reliable. And the supporting frame adopts the mode of combining the two frames, so that the height adjustment of the supporting frame can be realized by adjusting the height of the produced frame besides the advantages of convenient assembly, easy manufacture and cost saving. In addition, the side part of the switching circuit board can be provided with electronic elements, which is beneficial to signal processing of switching in the high-speed transmission process and is also beneficial to reducing the arrangement of the electronic elements of the circuit board. And the support frame is of a hollow frame-shaped structure, so that ventilation and heat dissipation are facilitated.

Drawings

Other features and effects of the present invention will be apparent from the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a perspective view of a first embodiment of a board-to-board electrical connection assembly of the present invention;

FIG. 2 is a side view of the first embodiment of the board-to-board electrical connection assembly;

FIG. 3 is a partial component exploded view of the first embodiment of the board-to-board electrical connection assembly with a first circuit board separated from a second circuit board;

FIG. 4 is a partial component exploded view of the first embodiment of the board-to-board electrical connection combination with the second circuit board separated;

FIG. 5 is a view from another angle of FIG. 3;

FIG. 6 is a perspective view of a first embodiment of the electrical connection device of the present invention;

FIG. 7 is a perspective view of another angle of the first embodiment of the electrical connection device;

FIG. 8 is an exploded view of the first embodiment of the electrical connection device;

FIG. 9 is an exploded view from another angle of the first embodiment of the electrical connection device;

FIG. 10 is a perspective view of a housing of the first embodiment of the electrical connection device;

FIG. 11 is a perspective view of a second embodiment of the electrical connection device of the present invention; and

fig. 12 is a partially exploded view of a third embodiment of the board-to-board electrical connection assembly of the present invention.

Wherein the reference numerals are as follows:

1 first Circuit Board

11 first mating connector

2 second Circuit Board

21 second mating connector

3 electric connection device

31 support frame

311 top part

311a upper opening

312 bottom

312a lower opening

32 switching circuit board

32a circuit board body

32b end piece

32c end piece

321 upper end part

321a lock hole

322 lower end portion

323 side part

324 electronic component

33 first connector

331 holding concave rail

34 second connector

341 holding concave rail

35 frame body

35a lock hole

350 outer frame part

351 top frame part

351a, 352a notch

351b holding raised rail

351c limiting block

352 bottom frame part

352b holding raised rail

353 side wall

356 spacing piece

357 positioning column

36 upper holding structure

361 stop

362 upper supporting block

362a rib

363 upper half-through groove

363a through groove

37 lower holding structure

371 dog

372 lower support block

372a rib

373 lower half through groove

373a through groove

38 fastening structure

381 hook

382 card slot

391 Upper reinforcing plate

391a lock hole

392 lower reinforcing plate

4 support column

5 locking element

Detailed Description

Before the present invention is described in detail, it should be noted that in the following description, like elements are represented by like reference numerals.

Referring to fig. 1 to 5, the first embodiment of the board-to-board electrical connection assembly of the present invention includes a first circuit board 1, a second circuit board 2 and an electrical connection device 3. The first circuit board 1 and the second circuit board 2 are vertically spaced and substantially parallel to each other, a first mating connector 11 is disposed on a surface of the first circuit board 1 facing the second circuit board 2, a second mating connector 21 is disposed on a surface of the second circuit board 2 facing the first circuit board 1, and the electrical connection device 3 is disposed between the first circuit board 1 and the second circuit board 2 and connected to the first mating connector 11 of the first circuit board 1 and the second mating connector 21 of the second circuit board 2, so that the first circuit board 1 and the second circuit board 2 are electrically connected through the electrical connection device 3. In addition, to maintain the stability of the whole structure, the board-to-board electrical connection assembly may further include at least two support columns 4 mounted between the first circuit board 1 and the second circuit board 2.

Referring to fig. 3 to 5, the electrical connection device 3 includes a supporting frame 31, a switching circuit board 32, a first connector 33 and a second connector 34. In this embodiment, the first mating connector 11 and the first connector 33 can be configured in the same manner and connected in opposite complementary manner, and the second mating connector 21 and the second connector 34 can be configured in the same manner and connected in opposite complementary manner. In this embodiment, the first connector 33 and the first mating connector 11 are Mezzanine connectors (Mezzanine connectors), and the second connector 34 and the second mating connector 21 are Mezzanine connectors (Mezzanine connectors).

Referring to fig. 6 to 10, the supporting frame 31 has a top portion 311 and a bottom portion 312. In the present embodiment, the supporting frame 31 includes two combined frame bodies 35, and the two combined frame bodies 35 define an upper holding structure 36 at the top 311 of the supporting frame 31 and a lower holding structure 37 at the bottom 312 of the supporting frame 31, which will be described later. The two frame bodies 35 of the present embodiment have the same structure, each frame body 35 includes an outer frame portion 350 extending in a vertical direction and having a plurality of hollow openings, two side walls 353, a top frame portion 351 located at the top, and a bottom frame portion 352 located at the bottom, the top frame portion 351 and the bottom frame portion 352 are respectively formed with a

concave notch

351a, 352a, and the concave directions of the

notches

351a, 352a of the top frame portion 351 and the bottom frame portion 352 are the same. The two sidewalls 353 are connected between the top frame portion 351 and the bottom frame portion 352 at intervals, and each sidewall 353 is formed with an upper half through slot 363 close to the top frame portion 351 and a lower half through slot 373 close to the bottom frame portion 352. The function of which will be explained later.

The supporting frame 31 further includes fastening structures 38 respectively disposed on the plurality of frame bodies 35 and capable of being fastened to each other, so that the frame bodies 35 can be combined by the fastening structures 38, and the plurality of fastening structures 38 include fasteners and complementary fasteners respectively disposed on the two frame bodies 35 and capable of being fastened to each other complementarily. In this embodiment, the fasteners and the complementary fasteners are the hooks 381 and the slots 382, specifically, the fasteners and the complementary fasteners are disposed on two side walls 353 of the frame 35 respectively, and the hooks 381 and the slots 382 are alternately disposed, and the fasteners and the complementary fasteners disposed on the two frames 35 are the same, referring to fig. 8, taking one frame 35 as an example, wherein one side wall 353 is the hook 381 and the slot 382 from top to bottom, and the other side wall 353 is the slots 382 and the hook 381 from top to bottom, and when the two frames 35 are opposite, the fastener of one frame 35 corresponds to the complementary fastener of the other frame 35. Of course, the fastening structure 38 is not limited to the above structure and arrangement, as long as two frames 35 can be provided for combining.

When the two frame bodies 35 are combined, the top frame portions 351 and the bottom frame portions 352 are respectively abutted against the two side walls 353, the top frame portions 351 of the two frame bodies 35 define the top portion 311 of the supporting frame 31, the notches 351a of the two top frame portions 351 define an upper opening 311a, the bottom frame portions 352 of the two frame bodies 35 define the bottom portion 312 of the supporting frame 31, the notches 352a of the bottom frame portions 352 define a lower opening 312a, and the functions of the upper opening 311a and the lower opening 312a will be described later.

The adapting circuit board 32 has an upper end 321, a lower end 322, and a side 323 between the upper end 321 and the lower end 322, wherein the upper end 321 includes a first connector 33, the lower end 322 includes a second connector 34, and the side 323 has a plurality of electronic components 324. The upper end 321 of the adapting circuit board 32 is fixed to the top 311 of the supporting frame 31, and the lower end 322 is fixed to the bottom 312 of the supporting frame 31, so that the first connector 33 and the first connector 34 are respectively located at the top 311 and the bottom 312 of the supporting frame 31 and can be respectively butted with the first butting connector 11 (see fig. 5) of the first circuit board 1 and the second butting connector 21 (see fig. 4) of the second circuit board 2.

Specifically, the adapting circuit board 32 assembly of the present embodiment includes a circuit board body 32a, and the first connector 33 and the second connector 34. The circuit board body 32a is a flexible circuit board, the circuit board body 32a is substantially long and has two

end pieces

32b and 32c, the first connector 33 and the second connector 34 are respectively disposed on the two

end pieces

32b and 32c and respectively cooperate with the two

end pieces

32b and 32c to form the upper end portion 321 and the lower end portion 322, and the first connector 33 and the second connector 34 are disposed on the same side surface of the circuit board body 32 a. The side portion 323 is the area of the circuit board body 32a between the two

end pieces

32b and 32 c.

In addition, the upper end 321 of the adapting circuit board 32 of the present embodiment further includes an upper reinforcing plate 391, the lower end 322 further includes a lower reinforcing plate 392, the upper reinforcing plate 391 and the first electrical connection 33 are respectively located on two opposite sides of the terminal 32b, the lower reinforcing plate 392 and the second electrical connection 34 are respectively located on two opposite sides of the terminal 32c, in other words, the upper reinforcing plate 391 is disposed on the back of the first connector 33 for supporting the first connector 33, and the lower reinforcing plate 392 is disposed on the back of the second connector 34 for supporting the second connector 34.

When the two frames 35 of the supporting frame 31 are combined, the upper end 321 and the lower end 322 of the adapting circuit board 32 are respectively held on the top 311 and the bottom 312 of the supporting frame 31 by the upper holding structure 36 and the lower holding structure 37.

Specifically, in the present embodiment, the upper holding structure 36 and the lower holding structure 37 of each frame 35 are the same, each of the upper holding structure 36 and the lower holding structure 37 includes a pair of holding

convex rails

351b, 352b and a pair of

stoppers

361, 371, the pair of holding convex rails 351b of the upper holding structure 36 are disposed on two inner edges of the top frame 351 opposite to the notch 351a, and the pair of stoppers 361 of the upper holding structure 36 are respectively disposed on one end of the holding convex rails 351b close to the outer frame 350. The pair of holding rails 352b of the lower holding structure 37 are disposed on the opposite inner edges of the bottom frame 352, and the pair of stoppers 371 of the lower holding structure 37 are respectively disposed on one end of the holding rails 352b near the outer frame 350. In addition, the upper holding structure 36 further includes an upper supporting block 362, the lower holding structure 37 further includes a lower supporting block 372, the upper supporting block 362 is formed on the outer frame 350 and faces upward to the notch 351a of the top frame 351, the upper supporting block 362 has a plurality of ribs 362a extending upward, the lower supporting block 372 is formed on the outer frame 350 and faces downward to the notch 352a of the bottom frame 352, and the lower supporting block 372 has a plurality of ribs 372a extending downward.

When the adapting circuit board 32 is assembled to the two combined frames 35, the holding concave rails 331 on the two sides of the first connector 33 at the upper end 321 of the adapting circuit board 32 are respectively embedded into the two holding convex rails 351b of the top frame 351 of the two frames 35 until abutting against the stoppers 361, at this time, the first connector 33 is exposed out of the top 311 of the supporting frame 31 (see fig. 6) through the upper opening 311a, and the upper supporting block 362 is located below the upper reinforcing plate 391 and supported on the back of the first connector 33. Similarly, the two opposite sides of the second connector 34 are respectively provided with a retaining concave rail 341, the retaining concave rails 341 on the two sides of the second connector 34 located at the lower end 322 of the adapting circuit board 32 are respectively embedded into the two retaining convex rails 352b of the bottom frame 352 of the two frames 35 until abutting against the stop 371, at this time, the second connector 34 is exposed out of the bottom 312 of the supporting frame 31 through the lower opening 312a (see fig. 7), and the lower support block 372 is located above the lower reinforcing plate 392 and is supported on the back of the second connector 34. The upper half through slots 363 of the side walls 353 of the two frames 35 are communicated to form a through slot 363a, the lower half through slots 373 are communicated to form a through slot 373a, and the two through

slots

363a, 373a provide the two ends of the adapting circuit board 32 to pass through.

When the adapting circuit board 32 is assembled to the supporting frame 31, the upper end 321 and the lower end 322 are bent relative to the side 323 and are opposite to each other, the adapting circuit board 32 is generally C-shaped, the side 323 is located on one side of the supporting frame 31, and the first connector 33 and the second connector 34 are opposite to each other. The upper end 321 and the lower end 322 of the adapting circuit board 32 are fixed to the top 311 and the bottom 312 of the supporting frame 31, but the upper and

lower fixing structures

36 and 37 are not limited to be provided, as long as the upper end 321 and the lower end 322 of the adapting circuit board 32 can be fixed to the top 311 and the bottom 312 of the supporting frame 31.

In this embodiment, since the two side walls 353 of each frame 35 are formed with the upper half through slot 363 and the lower half through slot 373 that can communicate the through

slots

363a and 373a when the frames 35 are combined, the adapting circuit board 32 can be assembled to the supporting frame 31 in a direction that the side portions 323 thereof are located on either side of the two opposite sides of the supporting frame 31.

Referring to fig. 3, 4, 8 and 9, when the electrical connection device 3 is assembled and combined between the first circuit board 1 and the second circuit board 2, the first connector 33 of the electrical connection device 3 is first inserted into the first mating connector 11 of the first circuit board 1, and then the locking element 5 is used to lock the top 311 of the electrical connection device 3 to the first circuit board 1, where the locking element 5 locks the top frame 351 of the frame 35, the upper end 321 of the adapter circuit board 32 and the upper reinforcing plate 391 together, in this embodiment, the frame 35 of the supporting frame 31, the upper end 321 of the adapter circuit board 32 and the upper reinforcing plate 391 are respectively provided with a locking hole 35a (see fig. 3), 321a and 391a through which the locking element 5 can pass. Then, the second connector 34 of the electrical connection device 3 is inserted into the second mating connector 21 of the second circuit board 2, and when the second connector 34 of the electrical connection device 3 is inserted into the second mating connector 21 of the second circuit board 2, as shown in fig. 2, a gap is preset between the bottom 312 of the electrical connection device 3 and the second circuit board 2, so as to prevent the insertion between the

connectors

2 and 21 from being interfered by the supporting frame 31.

Referring to fig. 10, further, in order to enable the upper end 321 of the adapting circuit board 32 to be more firmly fixed to the upper end 321 of the supporting frame 31, the upper fixing structure 36 further includes at least one stopper 351c respectively formed on the bottom surfaces of the top frame portions 351 of the two frame bodies 35, in this embodiment, the stopper 351c extends downward along the lock hole 35a in a ring shape, and when the upper end 321 of the adapting circuit board 32 is fixed to the top frame portion 351 of the supporting frame 31, the upper end 321 of the adapting circuit board 32 is located between the stopper 351c of the upper fixing structure 36 and the upper supporting block 362. The stopper 351c cooperates with the upper support block 362 to limit the vertical displacement of the upper end 321 of the adapting circuit board 32.

Referring to fig. 11, a second embodiment of the electrical connector device 3 of the present invention is different from the first embodiment in that each frame 35 'of the supporting frame 31' further includes two limiting pieces 356 extending outward from the two side walls 353 and having an L-shaped cross section, when the two frames 35 are combined, the ends of the two limiting pieces 356 face each other to limit the side 323 of the adapting circuit board 32 between the two limiting pieces 356, so as to limit the displacement and protection of the side 323 of the adapting circuit board 32.

Referring to fig. 12, a third embodiment of the board-to-board electrical connector assembly of the present invention is different from the first embodiment in that a plurality of positioning posts 357 are disposed on the bottom 312 of the supporting frame 31 ″, specifically, each frame 35 "further includes a positioning post 357 protruding downward from the bottom frame 352, and the second circuit board 2 'further includes a plurality of positioning holes 22, and when the electrical connector assembly is assembled on the second circuit board 2', such that the second connector 34 is mated with the second mating connector 21, the positioning posts 357 are inserted into the positioning holes 22 to achieve the function of auxiliary positioning.

As described above, the electrical connection device and the board-to-board electrical connection assembly of the present invention are respectively fixed on the top 311 and the bottom 312 of the supporting frame 31 by the upper end 321 and the lower end 322 of the adapting circuit board 32, and then the first and

second connectors

33, 34 are butted with the first and second butting connectors 11, 12 of the circuit boards 1, 2, compared with the prior art that adopts the pressing block method, not only can better electrical contact be maintained, but also the supporting frame 31 provides a better supporting structure for the adapting circuit board 32, so that the structure and electrical connection are more stable and reliable.

In addition, the supporting frame 31 is formed by combining the two frame bodies 35, and the two frame bodies 35 can have the same structure, so that the height adjustment of the supporting frame 31 can be achieved by adjusting the height of the produced frame body 35, besides the advantages of convenient assembly, easy manufacture and cost saving. Furthermore, since the side 323 of the adapting circuit board 32 can also be provided with the electronic components 324, it is helpful to reduce the layout of the electronic components of the circuit board in addition to the signal processing for adapting in the high-speed transmission process. Moreover, the supporting frame 31 is a hollow frame structure, which is also beneficial to ventilation and heat dissipation.

However, the above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the scope of the claims and the content of the description of the present invention are still included in the scope covered by the claims.

Claims

1. An electrical connection device, comprising:

a support frame having a top and a bottom; and

the adapter circuit board comprises an upper end part fixedly held at the top of the support frame, a lower end part fixedly held at the bottom of the support frame and a side part positioned between the upper end part and the lower end part, wherein the upper end part comprises a first connector, the lower end part comprises a second connector, the first connector and the second connector are arranged on the surface of the same side of the adapter circuit board, the support frame comprises two combined frame bodies, the two frame bodies are combined to define an upper fixedly holding structure and a lower fixedly holding structure, and the upper fixedly holding structure provides the upper end part fixedly holding the adapter circuit board and the first connector; the lower holding structure is provided for holding the lower end portion of the adapting circuit board and the second connector,

wherein, the two frame bodies have the same structure, each frame body comprises an outer frame body, two side walls connected with the outer frame body, a top frame body and a bottom frame body, when the two frame bodies are combined, the top frame parts of the two frame bodies are matched to define the top of the supporting frame, the bottom frame parts of the two frame bodies are matched to define the bottom of the supporting frame, and the two frame bodies are combined to define the upper holding structure and the lower holding structure,

wherein one of the upper holding structure and the first connector comprises a holding rail, the other comprises a holding groove rail for embedding the holding rail, and the first connector is held on the upper holding structure by embedding the holding rail into the holding groove rail; one of the lower holding structure and the second connector includes a holding rail, the other includes a holding groove rail into which the holding rail is inserted, and the second connector is held in the lower holding structure by the holding rail being inserted into the holding groove rail.

2. The electrical connector of claim 1, wherein the top frame portion and the bottom frame portion are respectively formed with a recessed notch, when the two frame portions are combined, the notches of the two top frame portions define an upper opening for exposing the first connector, the notches of the two bottom frame portions define a lower opening for exposing the second connector, the retaining convex rails of the upper retaining structure are arranged in pairs at two inner side edges of the notch of the top frame portion, the retaining convex rails of the lower retaining structure are arranged in pairs at two inner side edges of the notch of the bottom frame portion, and the retaining concave rails are arranged in pairs at two opposite side edges of each of the first connector and the second connector.

3. The electrical connection device of claim 2, wherein the upper retaining formation further comprises a stop disposed on the retaining ledge, said stop providing abutment of the first connector; the lower holding structure also comprises a stop block arranged on the holding convex rail, and the stop block provides the second connector for abutting.

4. The electrical connecting device as claimed in claim 3, wherein the upper holding structure further comprises upper supporting blocks respectively disposed on the two frames for supporting the back of the first connector, and the lower holding structure further comprises lower supporting blocks respectively disposed on the two frames for supporting the back of the second connector.

5. The electrical connecting device of claim 4, wherein the upper retaining structure further comprises at least one stopper formed on each of the two frames, and when the upper end of the adapting circuit board is retained on the top of the supporting frame, the upper end of the adapting circuit board is located between the stopper and the upper supporting block.

6. The electrical connection device as claimed in claim 1, wherein the upper end portion of the adapting circuit board further comprises an upper stiffener for supporting the first connector, the lower end portion of the adapting circuit board further comprises a lower stiffener for supporting the second connector, the upper stiffener and the first connector are respectively disposed on opposite surfaces of the upper end portion of the adapting circuit board; the lower reinforcing plate and the second connector are respectively arranged on two opposite surfaces of the lower end part of the adapter circuit board.

7. The electrical connection device of claim 1, wherein the supporting frame further comprises fastening structures respectively disposed on the two frame bodies for fastening the two frame bodies, the fastening structures comprising a fastening element respectively disposed on one of the frame bodies and a complementary fastening element disposed on the other frame body and capable of fastening with the fastening element.

8. The electrical connection device as claimed in claim 1, wherein each frame body is a hollow frame structure.

9. The electrical connection device as claimed in claim 1, wherein the adapting circuit board is a flexible circuit board, each side wall is formed with an upper half through groove near the top frame portion and a lower half through groove near the bottom frame portion, when the two frames are combined, the upper half through grooves of the two frames are communicated to form a through groove, the lower half through grooves of the two frames are communicated to form a through groove, and the two through grooves provide two ends of the adapting circuit board to penetrate through.

10. The electrical connection device as claimed in claim 1, wherein each frame further comprises two limiting pieces extending from the two side walls, respectively, and having an L-shaped cross section, and when the two frames are combined, the ends of the two limiting pieces face each other to limit the side of the adapting circuit board between the two limiting pieces.

11. A board-to-board electrical connection assembly comprising:

an electrical connection device comprising:

a support frame having a top and a bottom; and

the adapter circuit board comprises an upper end part fixedly held at the top of the supporting frame, a lower end part fixedly held at the bottom of the supporting frame and a side part positioned between the upper end part and the lower end part, wherein the upper end part comprises a first connector, the lower end part comprises a second connector, and the first connector and the second connector are arranged on the surface of the same side of the adapter circuit board;

a first circuit board, which is provided with a first butting connector for butting with the first connector and is used for butting with the first connector; and

a second circuit board having a second mating connector for mating with the second connector,

the support frame comprises two combined frame bodies, the two combined frame bodies define an upper fixing structure and a lower fixing structure, and the upper fixing structure provides an upper end part for fixing the adapter circuit board and the first connector; the lower holding structure is provided for holding the lower end portion of the adapting circuit board and the second connector,

12. The board-to-board electrical connection assembly of claim 11 wherein said top frame portion and said bottom frame portion are each formed with a recessed notch, and when said two frame portions are combined, said notches of said two top frame portions define an upper opening for exposing said first connector, said notches of said two bottom frame portions define a lower opening for exposing said second connector, said retaining rails of said upper retaining structure are disposed in pairs at opposite inner edges of said notch of said top frame portion, said retaining rails of said lower retaining structure are disposed in pairs at opposite inner edges of said notch of said bottom frame portion, and said retaining grooves are disposed in pairs at opposite sides of each of said first connector and said second connector.

13. The board-to-board electrical connection assembly of claim 12 wherein said upper retention formation further comprises a stop disposed on said retention ledge, said stop providing abutment of said first connector; the lower holding structure also comprises a stop block arranged on the holding convex rail, and the stop block provides the second connector for abutting.

14. The board-to-board electrical connection assembly of claim 13 wherein said upper retaining structure further comprises upper support blocks disposed on said two frames respectively for supporting said first connector back portion, and said lower retaining structure further comprises lower support blocks disposed on said two frames respectively for supporting said second connector back portion.

15. The board-to-board electrical connection assembly of claim 14, wherein the upper holding structure further comprises at least one stopper formed on each of the two frames, and when the upper end of the adapting circuit board is held on the top of the supporting frame, the upper end of the adapting circuit board is located between the stopper and the upper supporting block.

16. The board-to-board electrical connection assembly of claim 11, wherein the upper end portion of the adapting circuit board further comprises an upper stiffener for supporting the first connector, the lower end portion of the adapting circuit board further comprises a lower stiffener for supporting the second connector, the upper stiffener and the first connector are respectively disposed on opposite surfaces of the upper end portion of the adapting circuit board; the lower reinforcing plate and the second connector are respectively arranged on two opposite surfaces of the lower end part of the adapter circuit board.

17. The board-to-board electrical connection assembly of claim 11 wherein the support frame further comprises fastening structures respectively disposed on the two frame bodies for fastening the two frame bodies, the fastening structures comprising a fastening member disposed on one of the frame bodies and a complementary fastening member disposed on the other frame body and capable of fastening with the fastening member.

18. The board-to-board electrical connection assembly of claim 11 wherein each frame is a hollow frame.

19. The board-to-board electrical connection assembly as claimed in claim 11, wherein the adapting circuit board is a flexible circuit board, the sidewall of each frame has an upper through-slot near the top frame and a lower through-slot near the bottom frame, when the two frames are combined, the upper through-slots of the two frames are connected to form a through-slot, the lower through-slots of the two frames are connected to form a through-slot, and the two through-slots provide two ends of the adapting circuit board to pass through.

20. The board-to-board electrical connection assembly of claim 11, wherein each frame further comprises two L-shaped limiting pieces extending from the two side walls, and ends of the two L-shaped limiting pieces face each other to limit the side of the adapting circuit board between the two L-shaped limiting pieces when the two frames are combined.

21. The board-to-board electrical connection assembly of claim 11, wherein each frame further comprises a positioning post protruding downward from the bottom frame, and the second circuit board is provided with two positioning holes, and when the second connector of the electrical connection device is mated with the second mating connector of the second circuit board, the two positioning posts of the frame are inserted into the two positioning holes.

22. The board-to-board electrical connection assembly of claim 11 further comprising two support posts disposed between said first circuit board and said second circuit board.

23. The board-to-board electrical connection assembly of claim 11 wherein said first connector is identical in configuration to said first mating connector and said second connector is identical in configuration to said second mating connector.

24. The board-to-board electrical connection combination of claim 23 wherein the first connector and the first mating connector are mezzanine electrical connectors and the second connector and the second mating connector are mezzanine electrical connectors.

25. The board-to-board electrical connection assembly as claimed in claim 11, further comprising a locking member for locking the top of the supporting frame with the upper end of the adapting circuit board and the first circuit board, wherein the top of the supporting frame, the upper end of the adapting circuit board and the first circuit board are respectively provided with a locking hole for the locking member to pass through and lock.