TWI663790B - Doka connection device - Google Patents

Abstract

A multi-card connection device defines a card slot having a socket, and includes a first circuit board, a first terminal group, a second circuit board, a second terminal group, and a third circuit board. The first terminal group is disposed on the first circuit board and includes a plurality of first elastic terminals located in the card slot. The second circuit board is located above the first circuit board at intervals. The second terminal group is disposed on the second circuit board and includes a plurality of second elastic terminals located in the card slot. The second elastic terminals are located above the first elastic terminals and communicate with the card slot. The first elastic terminals are disposed opposite to each other. The third circuit board electrically connects the first circuit board with the second circuit board.

Description

Doka connection device

The invention relates to an electrical connection device, in particular to a multi-card connection device.

It is common for a general multi-card connector module to arrange a plurality of card connectors on a circuit board in a front-to-back arrangement, or to a left-to-right arrangement, or to stack up and down. If it is arranged side by side or side by side, it will occupy more area. If it is stacked up and down, for example, a dual SIM card connector disclosed in Chinese Patent No. CN201994444U includes a first SIM card connector and a second SIM card connector stacked one above the other, wherein the first SIM card connector and the second SIM card connector The SIM card connector is an independent connector and each has a card slot. Although the second SIM card connector is stacked directly above the first SIM card connector and can reduce the length in the front-rear and left-right directions, it is in the up-down direction. Still has a larger overall height.

Therefore, one of the objects of the present invention is to provide a multi-card connection device with a smaller volume.

Another object of the present invention is to provide a modularized multi-card connection device having an input / output connector.

Therefore, in some embodiments, the multi-card connection device of the present invention defines a card slot with a socket, and includes a first circuit board, a first terminal group, a second circuit board, and a second terminal group. And a third circuit board. The first terminal group is disposed on the first circuit board and includes a plurality of first elastic terminals located in the card slot. The second circuit board is located above the first circuit board at intervals. The second terminal group is disposed on the second circuit board and includes a plurality of second elastic terminals located in the card slot. The second elastic terminals are located above the first elastic terminals and communicate with the card slot. The first elastic terminals are disposed opposite to each other. The third circuit board electrically connects the first circuit board with the second circuit board.

In some embodiments, the third circuit board is a flexible circuit board.

In some embodiments, the first circuit board, the second circuit board, and the third circuit board are integrally formed by a flexible circuit board.

In some embodiments, a first backboard is disposed on the back of the first circuit board, and a second backboard is disposed on the back of the second circuit board.

In some embodiments, a fourth circuit board integrated with the first circuit board is further included, and an output-input connector is provided on the fourth circuit board.

In some embodiments, the first circuit board, the second circuit board, the third circuit board, and the fourth circuit board are integrally formed by a flexible circuit board. The multi-card connector further includes a first circuit board disposed on the first circuit board. A first backboard on the back of a circuit board, a second backboard on the back of the second circuit board, and a fourth backboard on the back of the fourth circuit board.

In some embodiments, the second elastic terminals are misaligned with respect to the first elastic terminals in a card insertion direction.

In some embodiments, the first terminal group further includes an insulated first terminal fixing plate to fix the first elastic terminals, and the second terminal group further includes an insulated second terminal fixing plate to fix the The second elastic terminal.

In some implementation forms, the first elastic terminals are used to electrically connect SIM card-type electronic cards, and the second elastic terminals are used to electrically connect SIM card-type electronic cards.

In some embodiments, a metal cover is further included, the metal cover and the first circuit board together define the card slot, and the metal cover has a top wall opposite to the first circuit board, and the second The circuit board is disposed on the top wall.

In some embodiments, the top wall of the metal cover has an opening, and the second terminal group is located in the card slot through the opening.

In some embodiments, the first circuit board, the second circuit board, and the third circuit board are integrally formed by a flexible circuit board, and the multi-card connector further includes a first A back plate and a second back plate disposed on the back of the second circuit board, and the second back plate is mechanically connected to the top wall and covers the opening.

In some embodiments, a fourth circuit board integrated with the first circuit board and an input / output connector provided on the fourth circuit board are further included. The multi-card connector further includes a A fourth back plate on the back of the fourth circuit board.

In some embodiments, a third terminal group is further provided on the first circuit board and located in the card slot. The third terminal group includes a plurality of third elastic terminals and is aligned in a card direction. It is farther from the socket than the first terminal group and is behind the first terminal group.

In some implementation forms, the third elastic terminals are used to electrically connect the micro SD card type electronic card.

In some embodiments, the card ejection mechanism is further included. The third terminal group further includes a third insulation base, and the third insulation base has a third terminal fixing plate body provided with the third elastic terminals. And a mounting base for setting the card ejection mechanism.

In some embodiments, the mounting base has a side wall portion connected to one side of the third terminal fixing plate body and extending in the card direction, and a third terminal fixing plate body and the third terminal fixing plate body. A rear wall portion on the rear side of the side wall portion, the card ejection mechanism includes a card ejection lever pivotably disposed on the rear wall portion, and a push rod slidably disposed on the side wall portion in the card insertion direction, The rear end of the push rod corresponds to one end of the ejection lever and can push the ejection lever to pivot.

In some embodiments, the ejection lever has a pivot hole, and the top wall of the metal cover integrally forms a pivot axis, and the pivot axis penetrates the pivot hole and is pivotally connected to the ejection lever.

In some embodiments, the push rod has a rod body extending in the card insertion direction, and a limiting protrusion protruding laterally from the rod body, and the side wall portion has a capacity An accommodating groove of the rod body and a limit groove extending laterally from the accommodating groove to correspondingly accommodate the limit projection are used to restrict the limit projection in the card direction. On the displacement.

In some embodiments, a card tray adapted to receive an electronic card to be inserted into the card slot is also included.

In some embodiments, the card tray includes a tray body and a set of seals disposed on the tray body.

The present invention has at least the following effects: The second elastic terminals and the first elastic terminals are arranged in the same card slot facing up and down, so that the total length of the multi-card connection device on a plane can be reduced, Compared with the existing structure of stacking two separate card connectors, the total height can be greatly reduced, and the use of multiple electronic cards has the advantages of space arrangement and flexibility. Further, the present invention as a whole can constitute a module, which is convenient for installation to electronic equipment, as long as it is docked with the docking connector of the main circuit board through the connector, and there is no need for additional soldering on the main circuit board.

1‧‧‧ metal cover

11‧‧‧ top wall

111‧‧‧ opening

112‧‧‧ Pivot

12‧‧‧ sidewall

13‧‧‧ rear wall

14‧‧‧ fixed feet

15‧‧‧Guide

16‧‧‧ Elastic buckle arm

2‧‧‧The first terminal group

21‧‧‧First flexible terminal

211‧‧‧Elastic contact part

212‧‧‧ tail

22‧‧‧First terminal fixing plate

3‧‧‧Second terminal set

31‧‧‧Second elastic terminal

311‧‧‧Elastic contact part

312‧‧‧ tail

32‧‧‧Second terminal fixing plate

4‧‧‧ connector

5‧‧‧Third terminal group

51‧‧‧Third elastic terminal

511‧‧‧Elastic contact part

512‧‧‧ tail

52‧‧‧Detection terminal

53‧‧‧The third insulation base

531‧‧‧Third terminal fixing plate

532‧‧‧Mounting base

532a‧‧‧ sidewall

5321‧‧‧Receiving slot

5322‧‧‧ limit slot

532b‧‧‧ rear wall

6‧‧‧Refund Card

61‧‧‧Ejection lever

611‧‧‧ Pivot

62‧‧‧Put

621‧‧‧ shaft

622‧‧‧ limit bump

7‧‧‧card tray

71‧‧‧panel

711‧‧‧First card slot

712‧‧‧Second card slot

713‧‧‧Third card slot

714‧‧‧Snap groove

72‧‧‧seals

8‧‧‧ Joystick

81‧‧‧sealing ring

10‧‧‧Card slot

101‧‧‧ jack

102‧‧‧Mounting holes

B1‧‧‧First circuit board

B2‧‧‧Second circuit board

B3‧‧‧third circuit board

B4‧‧‧ Fourth circuit board

B5‧‧‧First backplane

B6‧‧‧Second back plate

B7‧‧‧ Fourth backplane

C1‧‧‧electronic card

C2‧‧‧electronic card

C3‧‧‧electronic card

D‧‧‧Card direction

S‧‧‧Solder

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, wherein: FIG. 1 is an exploded perspective view of an embodiment of the multi-card connection device of the present invention; FIG. 2 is another view of FIG. 1 Angle view 3 is an exploded perspective view of the embodiment, a metal cover of which is not shown; FIG. 4 is a perspective view of the embodiment in an unassembled state; FIG. 5 is a top view corresponding to FIG. 4, where the metal cover is not shown; Fig. 6 is a perspective view of the embodiment; Fig. 7 is a front view corresponding to Fig. 6; Fig. 8 is a top view corresponding to Fig. 6; Fig. 9 is a cross-sectional view taken along a line VIII-VIII in Fig. 8; FIG. 11 is an exploded perspective view of a front surface of a card tray and an electronic card of the embodiment; and FIG. 12 is an exploded perspective view of a back surface of the card tray and two electronic cards of the embodiment.

1 to 4, an embodiment of a multi-card connection device according to the present invention includes a metal cover 1, a first circuit board B1, a first terminal group 2, a second circuit board B2, and a second terminal group. 3. A third circuit board B3, a fourth circuit board B4, an output input connector 4, a first back board B5, a second back board B6, a fourth back board B7, and a third terminal group 5. A card ejection mechanism 6 and a card tray 7 (see FIG. 10).

The metal cover 1 has a top wall 11 and two opposite sides of the top wall 11. The side wall 12 is bent and extended, and the rear wall 13 is bent and extended from the rear end of the top wall 11. The top wall 11 has an opening 111. The metal cover 1 further has a plurality of fixed legs 14 extending from the two side walls 12 and the rear wall 13.

In this embodiment, the first circuit board B1, the second circuit board B2, the third circuit board B3, and the fourth circuit board B4 are integrally formed by a flexible circuit board, such as an FPC flexible circuit board, in which the third circuit board B3 is The first circuit board B1 is electrically connected to the second circuit board B2. A first back board B5 is provided on the back of the first circuit board B1 to strengthen and support the first circuit board B1, and a second back board B6 is provided on the back of the second circuit board B2 to strengthen and support the second circuit board B2, and A fourth back plate B7 is disposed on the back of the fourth circuit board B4 to strengthen and support the fourth circuit board B4. The backplanes B5, B6, and B7 are rigid boards, which can be metal or non-metallic materials, and can be combined with the circuit boards B1, B2, and B4 by, for example, adhesion. In a modified embodiment, the circuit boards B1, B2, B3, and B4 may also be printed circuit boards, and the first circuit board B1 and the fourth circuit board B4 are integrally formed. In another modified embodiment, the first, second, and fourth circuit boards B1, B2, and B4 may be printed circuit boards, and only the third circuit board B3 is a flexible circuit board, and the first circuit board B1 and the first circuit board B1 The four circuit boards B4 are integrated. In this embodiment, the first circuit board B1 and the first back plate B5 are formed with a plurality of mounting holes 102 correspondingly for the metal cover 1 to pass through the fixing feet 14 of the two side walls 12. The metal cover 1 is The fixing legs 14 of the two side walls 12 and the rear wall 13 can be fixed to the first circuit board B1 by welding, such as surface welding, and at least one of the fixing legs 14 can optionally be a ground wire on the first circuit board B1. (Not shown) is electrically connected. After the metal cover 1 is combined with the first circuit board B1 and the first back plate B5, the metal cover 1 and the first circuit board B1 jointly define a card slot 10 having a socket 101, and the socket 101 is located at the rear The opposite side of the end wall 13, and in a card insertion direction D, the socket 101 is located forward with respect to the rear wall 13.

The first terminal group 2 is disposed on the first circuit board B1 and includes a plurality of first elastic terminals 21 located in the card slot 10 and an insulating first terminal fixing plate 22 to fix the first elasticity. Terminal 21. Each first elastic terminal 21 has an elastic contact portion 211 and a tail portion 212 for electrically connecting the first circuit board B1. The second terminal group 3 is disposed on the second circuit board B2 and includes a plurality of second elastic terminals 31 and an insulated second terminal fixing plate 32 to fix the second elastic terminals 31. Each second elastic terminal 31 has an elastic contact portion 311 and a tail portion 312 for electrically connecting the second circuit board B2. The connector 4 is disposed on the fourth circuit board B4 and is electrically connected to the fourth circuit board B4. In this embodiment, the connector 4 is a board-to-board connector. The third terminal group 5 is disposed on the first circuit board B1 and includes a plurality of third elastic terminals 51, two detection terminals 52, and a third insulating base 53 located in the card slot 10. The third elastic terminals 51 are farther from the socket 101 than the first terminal group 2 in the card direction D, and are behind the first terminal group 2. Each third elastic terminal 51 has an elastic contact portion 511 and a tail portion 512 for electrically connecting the first circuit board B1. The two detection terminals 52 are normally open switches, and are contacted and turned on when pressed. The third insulating base 53 has a third terminal fixing plate body 531 provided with the third elastic terminals 51 and detection terminals 52, and a card ejection machine. Construction 6 of the mounting seat 532. The mounting base 532 has a side wall portion 532a connected to one side of the third terminal fixing plate body 531 and extending in the card insertion direction D, and a side wall portion 532a connected to the third terminal fixing plate body 531 and the side wall portion. A rear wall portion 532b on the rear side of 532a.

With reference to FIG. 5 as well, the card ejection mechanism 6 includes a card ejection lever 61 pivotably disposed on the rear wall portion 532b, and a pusher slidably disposed on the side wall portion 532a in the card insertion direction D. The lever 62 has a rear end corresponding to one end portion of the eject lever 61 and can push the eject lever 61 to pivot. In this embodiment, the ejection lever 61 has a pivot hole 611, and the top wall 11 of the metal cover 1 is integrally formed with a pivot shaft 112 near the rear wall 13. The pivot shaft 112 penetrates the pivot hole 611 correspondingly. It is pivotally connected to the ejection lever 61. Since the pivot shaft 112 is integrally formed by the metal cover 1, not only the metal material has a better strength, but also is stronger because it is integrally formed with the metal cover 1. The push rod 62 has a rod body 621 extending in the card insertion direction D, and a limiting protrusion 622 protruding laterally from the rod body 621. The side wall portion 532a has a rod body 621 for accommodating the rod body 621. A receiving slot 5321 and a limiting slot 5322 extending laterally from the receiving slot 5321 to receive the limiting projection 622. The limiting slot 5322 is used to limit the limiting projection 622 on the card. Displacement in direction D.

Referring to FIGS. 4, 6 and 7, in this embodiment, the second circuit board B2 is disposed on the top wall 11 of the metal cover 1, and the second terminal group 3 is located in the card slot 10 through the opening 111. And are located above the first circuit board B1 at intervals, so that the second elastic terminals 31 are located above the first elastic terminals 21 and are in the card slot 10 The first elastic terminals 21 are provided so as to face each other. In this embodiment, the second back board B6 is larger than the second circuit board B2, and the second back board B6 is preferably made of a metal material, whereby the second circuit board B2 can pass through the second back board B6 and the metal cover. The overlapping portion of the top wall 11 of 1 is mechanically connected to the top wall 11 and covers the opening 111. For example, the second back plate B6 and the metal cover 1 are fixed together by spot welding to form a plurality of welding points. S. In a modified embodiment, the second circuit board B2 may also be directly disposed on the inner side of the top wall 11, and the opening 111 of the top wall 11 is omitted. Referring to FIG. 8 to FIG. 10, in this embodiment, the second elastic terminals 31 are displaced relative to the first elastic terminals 21 in the card insertion direction D, so that the second elastic terminals 31 and the When the first elastic terminals 21 are not aligned in the vertical direction and are staggered, when the card tray 7 is inserted into the card slot 10 along the card insertion direction D, the second elastic terminals 31 and the first elastic terminals 21 are not aligned. The card tray 7 will be pressed at the same time from the up and down directions at the same time, and the insertion resistance of the card tray 7 can be reduced. In a modified embodiment, the second elastic terminals 31 can also be staggered left and right with respect to the first elastic terminals 21, and can also achieve the function of phase misalignment in the card insertion direction D. In this embodiment, the first elastic terminals 21 are used to electrically connect SIM card-type electronic cards, such as Micro SIM, Nano SIM card, etc., and the second elastic terminals 31 are also used to electrically connect SIM card-type electronic cards. Electronic cards, and the third elastic terminals 51 are used to electrically connect electronic cards such as Micro SD cards. The second elastic terminals 31 are disposed opposite to the first elastic terminals 21 in the card slot 10, that is, the second elastic terminals 31 and the first elastic terminals 21 are located in the same card slot. 10 middle up and down settings, so Not only can reduce the total length on the plane, but also reduce the total height, it also has the advantage of space arrangement and flexibility in the use of multiple electronic cards. The input / output connector 4 is suitable for docking with a docking connector (not shown) on a main circuit board of an electronic device such as a mobile phone provided in a multi-card connection device, and the fourth circuit board B4 is connected to the first circuit. The board B1 is electrically connected, and the second circuit board B2 is electrically connected to the first circuit board B1 through the third circuit board B3, so that the first terminal group 2, the second terminal group 3, and the third terminal group 5 are electrically connected to the electronic card. The signal can be transmitted through the docking connector of the connector 4 and the main circuit board to transmit the signal to be output from the electronic card to the main circuit board or the signal to be input to the electronic card from the main circuit board. Thus, this embodiment can constitute a module as a whole, which is convenient for installation to electronic equipment, as long as it is docked with the docking connector of the main circuit board through the connector 4, and there is no need for additional soldering on the main circuit board. Of course, in a modified embodiment, the third terminal group 5 and the fourth circuit board B4 and the connector 4 may be omitted according to the use requirements.

10 to 12, the card tray 7 is adapted to receive electronic cards C1 and C2 to be inserted into the card slot 10 (see FIG. 6). In this embodiment, the card tray 7 includes a tray body 71 and a A sealing member 72 is sleeved on the plate body 71. As shown in FIG. 11, the upper surface of the disk body 71 forms a first card slot 711 where an electronic card C1, such as a SIM card, can be placed. As shown in FIG. 12, the lower surface of the disk body 71 forms a The second card slot 712 of another electronic card C2 such as a SIM card and a third card slot 713 where an electronic card C3 such as a Micro SD card can be placed. The second card slot 712 and the third card The slot 713 partially overlaps, and one of the electronic cards can be placed as required. See also figure 9. When the card tray 7 is inserted into the card insertion slot 10, the electronic card C1 of the first card slot 711 faces the second terminal group 3 to elastically contact the elastic contact portions 311 of the second elastic terminals 31 to form an electrical connection. The electronic card C2 of the second card slot 712 faces the first terminal group 2 to form an electrical connection with the elastic contact portion 211 of the first elastic terminal 21, and the electronic card C3 of the third card slot 713 faces the third terminal. The group 5 is electrically contacted with the elastic contact portions 511 of the third elastic terminals 51 to form an electrical connection. The electronic card C1 of the second card slot 712 and the electronic card C3 of the third card slot 713 are optional. The user can also choose to set an electronic card in only one of the card slots 711, 712, 713. The sealing member 72 of the card tray 7 is used to tightly contact the casing of the electronic device provided in the multi-card connection device to prevent liquid from penetrating. Referring again to FIG. 5 and FIG. 10, the push rod 62 of the ejection mechanism 6 may be pushed by an operation lever 8 for the user to operate. When the push rod 62 is pushed by the operation lever 8, it pushes one end of the ejection lever 61, and The other end of the ejection lever 61 is pivoted toward the socket 101 to push the card tray 7 upward, and then the card tray 7 is ejected from the card slot 10 (see FIG. 9). When the card tray 7 is inserted into the card insertion slot 10 again, the card ejection lever 61 is reset, waiting for the next card ejection operation. A sealing ring 81 is also sleeved on the operating rod 8 to tightly contact the housing of the electronic device to prevent liquid infiltration, so that the Doka connection device can achieve waterproof protection in the housing of the electronic device. Referring again to FIG. 2 and FIG. 6, the metal cover 1 further has three outwardly-folded guide portions 15 formed at two sockets 101 adjacent to the socket 101 and the top wall 11 adjacent to the socket 101, and respectively formed at Two elastic buckle arm portions 16 of the two side walls 12. The two guiding portions 15 are used to guide the card tray 7 to pass through the socket 101 to be inserted into the card slot 10. The two elastic buckle arm portions 16 are used to elastically buckle the buckle grooves 714 (see FIG. 11) on both sides of the card tray 7 to hold the card tray 7 so that the card tray 7 will not withdraw without the action of the eject lever 61. Card slot 10.

In summary, since the second elastic terminals 31 and the first elastic terminals 21 are located in the same card slot 10 facing up and down, this can not only reduce the total length of the multi-card connection device on the plane. Compared with the existing structure of stacking two separate card connectors, the total height can be greatly reduced, and the use of multiple electronic cards has the advantages of space arrangement and flexibility. Further, this embodiment may constitute a module as a whole, which is convenient for installation to electronic equipment, as long as it is docked with the docking connector of the main circuit board through the connector 4 and does not need to be additionally soldered on the main circuit board.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited in this way, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the patent specification of the present invention are still Within the scope of the invention patent.

Claims (21)

A multi-card connection device defines a card slot with a socket, and includes: a first circuit board; a first terminal group, which is disposed on the first circuit board and includes a plurality of first card slots in the card slot; A flexible terminal; a second circuit board located above the first circuit board at intervals; a second terminal group provided on the second circuit board and including a plurality of second flexible terminals located in the card slot, The second elastic terminals are located above the first elastic terminals and are disposed in the card slot to face the first elastic terminals; and a third circuit board, the first circuit board and the second circuit The board is electrically connected. The multi-card connection device according to claim 1, wherein the third circuit board is a flexible circuit board. The multi-card connection device according to claim 2, wherein the first circuit board, the second circuit board, and the third circuit board are integrally formed by a flexible circuit board. The multi-card connection device according to claim 3, further comprising a first back plate provided on the back of the first circuit board, and a second back plate provided on the back of the second circuit board. The multi-card connection device according to claim 1, further comprising a fourth circuit board integrated with the first circuit board, and an output-input connector provided on the fourth circuit board. The multi-card connecting device according to claim 5, wherein the first circuit board, the second circuit board, the third circuit board, and the fourth circuit board are integrally formed by a flexible circuit board, and the multi-card connector is also The method includes a first back plate disposed on the back of the first circuit board, a second back plate disposed on the back of the second circuit board, and a fourth back plate disposed on the back of the fourth circuit board. The multi-card connection device according to claim 1, wherein the second elastic terminals are misaligned with respect to the first elastic terminals in a card insertion direction. The multi-card connection device according to claim 1, wherein the first terminal group further includes an insulated first terminal fixing plate to fix the first elastic terminals, and the second terminal group further includes an insulated second terminal The fixing plate is used for fixing the second elastic terminals. The multi-card connection device according to claim 1, wherein the first elastic terminals are used to electrically connect SIM card-type electronic cards, and the second elastic terminals are used to electrically connect SIM card-type electronic cards. The multi-card connection device according to claim 1, further comprising a metal cover, the metal cover and the first circuit board jointly defining the card insertion slot, and the metal cover has a top wall opposite to the first circuit board. The second circuit board is disposed on the top wall. The multi-card connection device according to claim 10, wherein a top wall of the metal cover has an opening, and the second terminal group is located in the card slot through the opening. The multi-card connection device according to claim 11, wherein the first circuit board, the second circuit board, and the third circuit board are integrally formed by a flexible circuit board, and the multi-card connector further includes a first circuit board disposed in the first circuit board. A first back plate on the back of a circuit board and a second back plate provided on the back of the second circuit board, and the second back plate is mechanically connected to the top wall and covers the opening. The multi-card connection device according to claim 12, further comprising a fourth circuit board integrated with the first circuit board, and an output-input connector provided on the fourth circuit board. The multi-card connector further A fourth backplane is provided on the back of the fourth circuit board. The multi-card connection device according to any one of claims 10 to 13, further comprising a third terminal group provided on the first circuit board and located in the card slot, and the third terminal group includes a plurality of third terminals. The elastic terminal is farther from the socket than the first terminal group in a card direction and is behind the first terminal group. The multi-card connection device according to claim 14, wherein the third elastic terminals are used to electrically connect the micro SD card type electronic card. The multi-card connection device according to claim 15, further comprising a card ejection mechanism, the third terminal group further includes a third insulation base, and the third insulation base has a third terminal provided with the third elastic terminals A fixed plate body and a mounting base body for setting the card ejection mechanism. The multi-card connection device according to claim 16, wherein the mounting base has a side wall portion connected to one side of the third terminal fixing plate body and extending in the card insertion direction, and a third connection portion The terminal fixing plate body and a rear wall portion on the rear side of the side wall portion, the card ejection mechanism includes a card ejection lever pivotably disposed on the rear wall portion, and a slideably disposed in the card insertion direction. A push rod of the side wall portion, a rear end of the push rod corresponding to an end portion of the ejection lever and can push the ejection lever to pivot. The multi-card connecting device according to claim 17, wherein the ejection lever has a pivot hole, and the top wall of the metal cover integrally forms a pivot axis, and the pivot axis penetrates the pivot hole correspondingly to pivot with the ejection lever. Pick up. The multi-card connecting device according to claim 18, wherein the push rod has a rod body extending in the card insertion direction, and a limiting projection protruding laterally from the rod body, and the side wall portion has a An accommodating slot for accommodating the rod body, and a limit slot extending laterally from the accommodating slot to correspondingly accommodate the limit projection, the limit slot is used to limit the limit projection on the card. Displacement in the direction. The multi-card connection device according to claim 1, further comprising a card tray adapted to receive an electronic card to be inserted into the card slot. The multi-card connecting device according to claim 20, wherein the card tray includes a tray body and a set of seals provided on the tray body.