CN109462057B

CN109462057B - Multi-card connecting device

Info

Publication number: CN109462057B
Application number: CN201710794557.0A
Authority: CN
Inventors: 陈锋
Original assignee: Molex LLC
Current assignee: Molex LLC
Priority date: 2017-09-06
Filing date: 2017-09-06
Publication date: 2020-04-24
Anticipated expiration: 2037-09-06
Also published as: CN109462057A; TWI663790B; TW201914107A

Abstract

A multi-card connecting device defines a card slot with a socket and comprises 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 arranged on the first circuit board and comprises a plurality of first elastic terminals positioned in the card inserting grooves. The second circuit board is arranged above the first circuit board at intervals. The second terminal group is arranged on the second circuit board and comprises a plurality of second elastic terminals positioned in the card inserting groove, and the plurality of second elastic terminals are positioned above the plurality of first elastic terminals and are arranged in the card inserting groove in a mode of being opposite to the plurality of first elastic terminals. The third circuit board electrically connects the first circuit board and the second circuit board.

Description

Multi-card connecting device

Technical Field

The present invention relates to an electrical connector, and more particularly to a multi-card connector.

Background

It is common for a typical multi-card connector module to arrange a plurality of card connectors on a circuit board in a front-to-back arrangement, or a left-to-right arrangement, or a top-to-bottom stacking arrangement. If the two are arranged in front and back or left and right, a large area is occupied. For example, chinese patent No. CN201994444U discloses a dual SIM card connector including a first SIM card connector and a second SIM card connector stacked one on top of the other, wherein the first SIM card connector and the second SIM card connector are independent connectors and each have a card slot, and although the second SIM card connector is stacked directly above the first SIM card connector, the length in the front-back and left-right directions can be reduced, but the overall height in the up-down direction is still large.

Disclosure of Invention

Therefore, one of the objectives 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 modular multi-card connector with input/output connectors.

Thus, in some embodiments, the multi-card connection device defines a card slot having a socket, and includes a first circuit board, a first terminal set, a second circuit board, a second terminal set, and a third circuit board. The first terminal group is arranged on the first circuit board and comprises a plurality of first elastic terminals positioned in the card inserting grooves. The second circuit board is arranged above the first circuit board at intervals. The second terminal group is arranged on the second circuit board and comprises a plurality of second elastic terminals positioned in the card inserting groove, and the plurality of second elastic terminals are positioned above the plurality of first elastic terminals and are arranged in the card inserting groove in a mode of being opposite to the plurality of first elastic terminals. The third circuit board electrically connects the first circuit board and the second circuit board.

In some implementations, 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, the multi-card connection device further includes a first backplane disposed on a back side of the first circuit board and a second backplane disposed on a back side of the second circuit board.

In some embodiments, the multi-card connection device further includes a fourth circuit board integrally formed with the first circuit board and an input/output connector disposed 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, and the multi-card connector further includes a first back plate disposed on a back surface of the first circuit board, a second back plate disposed on a back surface of the second circuit board, and a fourth back plate disposed on a back surface of the fourth circuit board.

In some embodiments, the plurality of second sprung terminals are offset from the plurality of first sprung terminals in a card insertion direction.

In some embodiments, the first terminal set further includes an insulating first terminal fixing plate for fixing the first elastic terminals, and the second terminal set further includes an insulating second terminal fixing plate for fixing the second elastic terminals.

In some embodiments, the first resilient terminals are electrically connected to an electronic card of the SIM card class, and the second resilient terminals are electrically connected to an electronic card of the SIM card class.

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

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

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

In some embodiments, the multi-card connector further includes a fourth circuit board integrally formed with the first circuit board, and an input/output connector disposed on the fourth circuit board, and the multi-card connector further includes a fourth backplane disposed on a back surface of the fourth circuit board.

In some embodiments, the multi-card connecting device further includes a third terminal set disposed on the first circuit board and located in the card slot, the third terminal set including a plurality of third elastic terminals and being located behind the first terminal set in a card inserting direction, farther from the socket than the first terminal set.

In some embodiments, the plurality of third resilient terminals are used to electrically connect an electronic card of the Micro SD card type.

In some embodiments, the multi-card connecting device further includes a card withdrawing mechanism, the third terminal set further includes a third insulating base, and the third insulating base has a third terminal fixing plate body provided with the plurality of third elastic terminals and a mounting base body for mounting the card withdrawing mechanism.

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

In some embodiments, the ejector pin has a pivot hole, and the top wall of the metal cover integrally forms a pivot shaft, which correspondingly penetrates through the pivot hole to pivotally connect with the ejector pin.

In some embodiments, the push rod has a rod extending in the card insertion direction and a limit protrusion protruding laterally from the rod, the sidewall portion has a receiving slot for receiving the rod and a limit slot extending laterally from the receiving slot to receive the limit protrusion, and the limit slot is configured to limit the displacement of the limit protrusion in the card insertion direction.

In some embodiments, the multi-card connector further includes a card tray adapted to receive an electronic card for insertion into the card slot.

In some embodiments, the card tray includes a tray body and a seal disposed about the tray body.

The invention has at least the following effects: the second elastic terminals and the first elastic terminals are arranged in the same card slot in a vertically opposite manner, so that the total length of the multi-card connecting device on a plane can be reduced, the total height can be greatly reduced compared with the existing structure of stacking two independent card connectors, and the multi-card connecting device has space arrangement advantages and elasticity in the use of a plurality of electronic cards. Furthermore, the whole body of the invention can form a module, is convenient to be installed on the electronic equipment, and can be butted with the butting connector of the main circuit board only through the connector without being additionally welded on the main circuit board.

Drawings

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

FIG. 1 is an exploded perspective view of one embodiment of the multi-card connector of the present invention;

FIG. 2 is another angular view of FIG. 1;

FIG. 3 is an exploded perspective view of the embodiment, with a metal cover 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, wherein 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 line VIII-VIII in FIG. 8;

FIG. 10 is a perspective view of the embodiment;

FIG. 11 is an exploded perspective view of the front side of a card tray and an electronic card according to this embodiment; and

fig. 12 is an exploded perspective view of the back side of the card tray of this embodiment with two electronic cards.

Wherein the reference numerals are as follows:

1 Metal lid

11 ceiling wall

111 opening

112 pivot

12 side wall

13 rear end wall

14 fixed foot

15 guide part

16 elastic clasp arm part

2 first terminal group

21 first elastic terminal

211 elastic contact part

212 tail section

22 first terminal fixing plate

3 second terminal group

31 second elastic terminal

311 elastic contact part

312 tail part

32 second terminal holding plate

4 connector

5 third terminal group

51 third elastic terminal

511 elastic contact part

512 tail part

52 detection terminal

53 third insulating base

531 third terminal fixing plate

532 installation base

532a side wall part

5321A receiving groove

5322 limiting groove

532b rear wall part

6 card withdrawing mechanism

61 disengaging rod

611 pivot hole

62 push rod

621 rod body

622 limit lug

7 card tray

71 dish body

711 first card slot

712 second card slot

713 third card slot

714 snap groove

72 seal

8 operating rod

81 sealing ring

10 card slot

101 socket

102 mounting hole

B1 first circuit board

B2 second circuit board

B3 third circuit board

B4 fourth circuit board

B5 first backboard

B6 second backboard

B7 fourth backboard

C1 electronic card

C2 electronic card

C3 electronic card

D card insertion direction

S welding spot

Detailed Description

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

The metal cap 1 has a top wall 11, two side walls 12 extending from two opposite sides of the top wall 11, and a rear end wall 13 extending from a rear end of the top wall 11. The top wall 11 has an opening 111. The metal cover 1 also has a plurality of fixing legs 14 extending from the side walls 12 and the rear end wall 13.

In the present 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, wherein the third circuit board B3 electrically connects the first circuit board B1 and the second circuit board B2. The first back plate B5 is disposed on the back of the first circuit board B1 for supporting the first circuit board B1, the second back plate B6 is disposed on the back of the second circuit board B2 for supporting the second circuit board B2, and the fourth back plate B7 is disposed on the back of the fourth circuit board B4 for supporting the fourth circuit board B4. The back plates B5, B6, B7 are hard plates, may be made of metal or non-metal materials, and may be combined with the circuit boards B1, B2, B4 by using, for example, an adhesive method. In an alternative 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 alternative embodiment, the first, second and fourth circuit boards B1, B2 and B4 may be printed circuit boards, while only the third circuit board B3 is a flexible circuit board, and the first circuit board B1 and the fourth circuit board B4 are integrally formed. In the embodiment, a plurality of mounting holes 102 are correspondingly formed in the first circuit board B1 and the first back plate B5, so that the fixing pins 14 of the metal cover 1 on the two side walls 12 can respectively penetrate through the mounting holes, the fixing pins 14 of the metal cover 1 on the two side walls 12 and the rear end wall 13 can be combined and fixed with the first circuit board B1 by welding, such as surface welding, and at least one of the fixing pins 14 can be selectively electrically connected to a ground line (not shown) on the first circuit board B1. After the metal cover 1 is combined with the first circuit board B1 and the first backplane B5, the metal cover 1 and the first circuit board B1 together define a card slot 10 having a socket 101, the socket 101 is located on the opposite side of the rear end wall 13, and the socket 101 is located in front relative to the rear end wall 13 in a card insertion direction D.

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

With reference to fig. 5, the card ejecting mechanism 6 includes an ejecting rod 61 pivotally disposed on the rear wall 532b and a push rod 62 slidably disposed on the side wall 532a in the card inserting direction D, and a rear end of the push rod 62 corresponds to an end of the ejecting rod 61 and pushes the ejecting rod 61 to pivot. In this embodiment, the card-withdrawing rod 61 has a pivot hole 611, and the top wall 11 of the metal cover 1 is integrally formed with a pivot 112 near the rear end wall 13, and the pivot 112 correspondingly penetrates through the pivot hole 611 to pivotally connect with the card-withdrawing rod 61. Since the pivot 112 is integrally formed with the metal cover 1, the metal material has better strength and is more firmly formed integrally with the metal cover 1. The push rod 62 has a rod 621 extending in the card insertion direction D and a limit protrusion 622 protruding from the rod 621 in a lateral direction, the sidewall 532a has a receiving groove 5321 for receiving the rod 621 and a limit groove 5322 extending from the receiving groove 5321 in the lateral direction to correspondingly receive the limit protrusion 622, and the limit groove 5322 is used for limiting the displacement of the limit protrusion 622 in the card insertion direction D.

Referring to fig. 4, 6 and 7, in the present embodiment, the second circuit board B2 is disposed on the top wall 11 of the metal cover 1, the second terminal group 3 is located in the card slot 10 through the opening 111 and is spaced above the first circuit board B1, so that the plurality of second elastic terminals 31 are located above the plurality of first elastic terminals 21 and are disposed opposite to the plurality of first elastic terminals 21 in the card slot 10. In this embodiment, the second back plate B6 is larger than the second circuit board B2, and the second back plate B6 is preferably made of metal, so that the second circuit board B2 can be mechanically connected to the top wall 11 of the metal cover 1 through the overlapping portion of the second back plate B6 and the top wall 11 and cover the opening 111, for example, the second back plate B6 is fixed to the metal cover 1 by spot welding to form a plurality of solder joints S. In an alternative embodiment, the second circuit board B2 may 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 10, in the present embodiment, the plurality of second elastic terminals 31 are staggered with respect to the plurality of first elastic terminals 21 in the card insertion direction D, so that the plurality of second elastic terminals 31 and the plurality of first elastic terminals 21 are not aligned and staggered in the vertical direction, when the card tray 7 is inserted into the card insertion slot 10 along the card insertion direction D, the plurality of second elastic terminals 31 and the plurality of first elastic terminals 21 do not simultaneously press the card tray 7 in the vertical direction at the same position, and the insertion resistance of the card tray 7 can be reduced. In a modified embodiment, the plurality of second elastic terminals 31 may be shifted from the plurality of first elastic terminals 21 in the left-right direction, and similarly, the function of shifting in the card insertion direction D may be achieved. In the present embodiment, the first elastic terminals 21 are used to electrically connect to electronic cards of SIM card type, such as Micro SIM card, Nano SIM card, etc., the second elastic terminals 31 are also used to electrically connect to electronic cards of SIM card type, and the third elastic terminals 51 are used to electrically connect to electronic cards of Micro SD card type. The plurality of second elastic terminals 31 are disposed in the card slot 10 opposite to the plurality of first elastic terminals 21, that is, the plurality of second elastic terminals 31 and the plurality of first elastic terminals 21 are disposed up and down in the same card slot 10, so that not only the total length on a plane can be reduced, but also the total height can be reduced, and the space arrangement advantage and elasticity are provided in the use of a plurality of electronic cards. The input/output connector 4 is adapted to be mated with a mating connector (not shown) of a main circuit board of an electronic device such as a mobile phone provided with a multi-card connector, and is electrically connected to the first circuit board B1 via the fourth circuit board B4, and the second circuit board B2 is electrically connected to the first circuit board B1 via the third circuit board B3, so that signals after the first terminal set 2, the second terminal set 3 and the third terminal set 5 are electrically connected to an electronic card can be transmitted via the mating connector of the connector 4 and the main circuit board to transmit signals to be output from the electronic card to the main circuit board or signals to be input to the electronic card from the main circuit board. Therefore, the whole body of the embodiment can form a module, the module is convenient to mount to electronic equipment, and only the connector 4 is butted with the butting connector of the main circuit board, and the main circuit board does not need to be additionally welded. Of course, in alternative embodiments, the third terminal set 5, the fourth circuit board B4 and the connector 4 may be omitted according to the usage requirement.

Referring to fig. 10 to 12, the card tray 7 is adapted to receive electronic cards C1 and C2 for inserting into the card slot 10 (see fig. 6), and in the embodiment, the card tray 7 includes a tray body 71 and a sealing member 72 sleeved on the tray body 71. As shown in fig. 11, a first card slot 711 for receiving an electronic card C1 such as a SIM card is formed on the upper surface of the tray 71, as shown in fig. 12, a second card slot 712 for receiving another electronic card C2 such as a SIM card and a third card slot 713 for receiving an electronic card C3 such as a Micro SD card are formed on the lower surface of the tray 71, and the second card slot 712 and the third card slot 713 partially overlap to selectively receive electronic cards according to the use requirement. Referring to fig. 9, when the card tray 7 is inserted into the card slot 10, the electronic card C1 of the first card slot 711 faces the second terminal set 3 to elastically contact with 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 set 2 to elastically contact with the elastic contact portions 211 of the first elastic terminals 21 to form an electrical connection, and the electronic card C3 of the third card slot 713 faces the third terminal set 5 to elastically contact with the elastic contact portions 511 of the third elastic terminals 51 to form an electrical connection, wherein the electronic card C1 of the second card slot 712 and the electronic card C3 of the third card slot 713 are alternatively disposed, and of course, a user may select to dispose an electronic card only in one of the

card slots

711, 712, 713. The sealing member 72 of the card tray 7 is used to be in close contact with the housing of the electronic apparatus in which the multi-card connecting device is provided to prevent liquid from penetrating. Referring to fig. 5 and 10, the push rod 62 of the card ejecting mechanism 6 can be pushed by an operating rod 8 for a user to operate, and the push rod 62 is pushed by the operating rod 8 to push one end of the card ejecting rod 61, so that the other end of the card ejecting rod 61 pivots toward the socket 101 to eject the card tray 7, thereby ejecting the card tray 7 from the card slot 10 (see fig. 9). When the card tray 7 is placed into the card insertion slot 10 again, the card withdrawing rod 61 is reset to wait for the next card withdrawing operation. A sealing ring 81 is also provided on the operating rod 8 for sealing with the housing of the electronic device to prevent liquid from penetrating, so that the multi-card connector is protected from water in the housing of the electronic device. Referring to fig. 2 and 6, the metal lid 1 further has three outward-folded guiding portions 15 respectively formed at the sockets 101 adjacent to the two side walls 12 and the sockets 101 adjacent to the top wall 11, and two elastic buckle arm portions 16 respectively formed at the two side walls 12. The two guides 15 are used to guide the card tray 7 to pass through the insertion opening 101 smoothly for insertion into the card insertion slot 10. The two elastic latch arms 16 are used to elastically latch into latch slots 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 be ejected from the card slot 10 without the action of the ejection rod 61.

In summary, the second elastic terminals 31 and the first elastic terminals 21 are disposed in the same card slot 10 in an up-down direction, so that the total length of the multi-card connector on a plane can be reduced, the total height can be greatly reduced compared with the conventional structure in which two separate card connectors are stacked, and the space arrangement advantage and flexibility are provided in the use of a plurality of electronic cards. Further, the whole of the present embodiment can form a module, which is convenient to be mounted to the electronic device, as long as the connector 4 is butted with the butting connector of the main circuit board, and no additional welding is required on the main circuit board.

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 claims and the contents of the patent specification should be included in the scope of the present invention.

Claims

1. A multi-card connector device defining a card slot having a socket, comprising:

a first circuit board;

the first terminal group is arranged on the first circuit board and comprises a plurality of first elastic terminals positioned in the card inserting grooves;

the second circuit board is positioned above the first circuit board at intervals;

the second terminal group is arranged on the second circuit board and comprises a plurality of second elastic terminals positioned in the card inserting slot, and the plurality of second elastic terminals are positioned above the plurality of first elastic terminals and are arranged in the card inserting slot opposite to the plurality of first elastic terminals; and

a third circuit board electrically connecting the first circuit board and the second circuit board,

the multi-card connecting device also comprises a fourth circuit board which is integrated with the first circuit board and an output-input connector which is arranged on the fourth circuit board and is used for being butted with a butting connector of a main circuit board.

2. The multi-card connecting device of claim 1, wherein the third circuit board is a flexible circuit board.

3. The multi-card connecting device of claim 2, wherein the first circuit board, the second circuit board and the third circuit board are integrally formed by a flexible circuit board.

4. The multi-card connecting device of claim 3, wherein the multi-card connecting device further comprises a first back plate disposed on the back side of the first circuit board and a second back plate disposed on the back side of the second circuit board.

5. The multi-card connecting device of claim 1, 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, the multi-card connecting device further comprising a first back plate disposed on a back surface of the first circuit board, a second back plate disposed on a back surface of the second circuit board and a fourth back plate disposed on a back surface of the fourth circuit board.

6. The multi-card connecting device of claim 1, wherein the second plurality of sprung terminals are offset in a card insertion direction with respect to the first plurality of sprung terminals.

7. The multi-card connecting device of claim 1, wherein the first terminal set further comprises an insulative first terminal holding plate for holding the first plurality of resilient terminals, and the second terminal set further comprises an insulative second terminal holding plate for holding the second plurality of resilient terminals.

8. The multi-card connecting device of claim 1, wherein the first resilient terminals are electrically connected to an electronic card of the SIM card type, and the second resilient terminals are electrically connected to an electronic card of the SIM card type.

9. The multi-card connecting device of claim 1, wherein the multi-card connecting device further comprises a metal cover, the metal cover and the first circuit board together define the card slot, the metal cover has a top wall opposite to the first circuit board, and the second circuit board is disposed on the top wall.

10. The multi-card connecting device of claim 9, wherein the top wall of the metal cover has an opening through which the second terminal set is located in the card-insertion slot.

11. The multi-card connecting device of claim 10, 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 connecting device further comprising a first back plate disposed on a back surface of the first circuit board and a second back plate disposed on a back surface of the second circuit board, the second back plate being mechanically connected to the top wall and covering the opening.

12. The multi-card connecting device of claim 11, wherein the multi-card connecting device further comprises a fourth circuit board integrally formed with the first circuit board and an input/output connector disposed on the fourth circuit board, and the multi-card connecting device further comprises a fourth back plate disposed on a back surface of the fourth circuit board.

13. The multi-card connecting device of any one of claims 9 to 12, wherein the card slot has a socket, the multi-card connecting device further comprising a third terminal set disposed on the first circuit board and located in the card slot, the third terminal set comprising a plurality of third elastic terminals, and the plurality of third elastic terminals are farther from the socket than the first terminal set in a card insertion direction and are located behind the first terminal set.

14. The multi-card connecting device of claim 13, wherein the plurality of third resilient terminals are configured to electrically connect to an electronic card of the MicroSD card type.

15. The multi-card connecting device of claim 14, wherein the multi-card connecting device further comprises a card ejecting mechanism, the third terminal set further comprises a third insulating base, the third insulating base has a third terminal fixing plate body provided with the plurality of third elastic terminals and a mounting base body for mounting the card ejecting mechanism.

16. The multi-card connecting device of claim 15, wherein the mounting base has a side wall portion connected to one side of the third terminal fixing plate and extending in the card insertion direction and a rear wall portion connected to the third terminal fixing plate and a rear side of the side wall portion, the card ejecting mechanism includes an ejecting lever pivotally disposed on the rear wall portion and a push rod slidably disposed on the side wall portion in the card insertion direction, a rear end of the push rod corresponds to an end of the ejecting lever and can push the ejecting lever to pivot.

17. The multi-card connecting device of claim 16, wherein the card-releasing lever has a pivot hole, and the top wall of the metal cover integrally forms a pivot shaft, which correspondingly penetrates through the pivot hole to pivotally connect with the card-releasing lever.

18. The multi-card connecting device of claim 17, wherein the pushing rod has a rod extending in the card insertion direction and a limit protrusion protruding laterally from the rod, the sidewall has a receiving slot for receiving the rod and a limit slot extending laterally from the receiving slot for receiving the limit protrusion, the limit slot is used to limit the displacement of the limit protrusion in the card insertion direction.

19. The multi-card connecting device of claim 1, further comprising a card tray adapted to receive an electronic card for insertion into the card slot.

20. The multi-card connector of claim 19, wherein the card tray includes a tray body and a seal disposed about the tray body.