CN111010465B

CN111010465B - Card seat assembly and mobile terminal with same

Info

Publication number: CN111010465B
Application number: CN201811168827.8A
Authority: CN
Inventors: 李化顺; 张亮
Original assignee: Shanghai Moruan Communication Technology Co Ltd
Current assignee: Shanghai Moruan Communication Technology Co Ltd
Priority date: 2018-10-08
Filing date: 2018-10-08
Publication date: 2023-04-18
Anticipated expiration: 2038-10-08
Also published as: CN111010465A

Abstract

The invention provides a card seat assembly and a mobile terminal with the same, wherein the card seat assembly comprises a front shell, a main board and a terminal card seat, the terminal card seat is arranged between the front shell and the main board, and the terminal card seat comprises a shell, a push rod mechanism and a card support; the shell is fixed in a groove on the inner surface of the front shell facing the main board, the card holder is fixed on the upper surface of the main board facing the front shell, and the shell and the card holder can be separately combined together and form a cavity between the shell and the card holder; the push rod mechanism is arranged in the groove and extends into the cavity. The mobile terminal comprises a rear shell and a clamping seat assembly, wherein the rear shell is assembled with the front shell, and the main board and the terminal clamping seat are positioned between the front shell and the rear shell. The card seat assembly and the mobile terminal with the same provided by the invention can reduce the thickness of the whole mobile terminal and ensure the strength of the front shell.

Description

Card seat assembly and mobile terminal with same

Technical Field

The invention relates to the technical field of electronic product components, in particular to a card seat assembly and a mobile terminal with the same.

Background

At present, more and more mobile phones use PIN-PUSH sockets, and the sockets comprise a plurality of parts: a shell (generally a steel sheet with 0.15-0.3 mm), a push rod mechanism and a functional PIN part.

In the prior art, the structural design schemes of the front shell, the card seat and the main board have the following two types: firstly, a single card seat is pasted on a main board, and a front shell is thick in glue above the card seat, so that the strength of the front shell is ensured; secondly, the cassette monomer paster is on the mainboard, and preceding shell does not have the gluey position in the cassette top, guarantees complete machine thickness.

However, the above two schemes have the following disadvantages: the first scheme ensures the strength of the front shell, but causes the increase of the thickness of the whole mobile phone, which is contrary to the trend of thinning the mobile phone; the second proposal ensures that the thickness of the whole machine is not thickened, but the strength of the front shell is weaker.

Disclosure of Invention

The invention provides a card holder assembly and a mobile terminal with the same, aiming at solving the technical problem that a PIN-PUSH card holder for a SIM card of an electronic product in the prior art cannot be light, thin and high in strength.

The invention solves the technical problems through the following technical scheme:

a card seat assembly comprises a front shell, a main board and a terminal card seat, wherein the terminal card seat is arranged between the front shell and the main board and comprises a shell, a push rod mechanism and a card support; the shell is fixed in a groove of the inner surface of the front shell facing the mainboard, the card holder is fixed on the upper surface of the mainboard facing the front shell, and the shell and the card holder are detachably combined together to form a cavity between the shell and the card holder; the push rod mechanism is arranged in the groove and extends into the cavity.

In this technical scheme, the thickness between mainboard and the preceding shell diminishes, through the mode that holds in the palm with the card and mainboard combination, shell and preceding shell combination, has eliminated and has originally existed in the thickness that the card held in the palm and shell between mainboard and the preceding shell, and the intensity that originally provides by gluing the position now provides through the combination of shell and preceding shell simultaneously, has guaranteed that the intensity of preceding shell can not receive the influence, finally realizes the purpose that thickness reduces.

Preferably, in the card socket assembly of the present invention, the groove has an accommodating groove, a fixing portion and a sliding groove, the accommodating groove is used for fixing the housing, the fixing portion is disposed at the bottom of the groove, and the sliding groove is disposed at a side portion of the groove and is adjacent to the accommodating groove; the push rod mechanism comprises a push rod and a connecting rod, the push rod is movably connected with the connecting rod, the push rod is arranged in the sliding groove in a sliding mode, the connecting rod is pivoted to the fixing portion, and the push rod slides to drive the connecting rod to rotate.

In this technical scheme, divide into holding tank, fixed part and sliding tray triplex with the structure of recess, fixed shell in the holding tank plays the effect that provides intensity for preceding shell, and the fixed part provides the pivot for the rotation of connecting rod, makes the connecting rod can stretch into the tray of SIM card in the cavity between shell and the card support under the drive of push rod and release, and the sliding tray can provide direction and partial supporting role for the concertina movement of push rod.

Preferably, in the holder assembly of the present invention, the sliding groove and the receiving groove are separated by a plurality of blocks, and the push rod is clamped in the blocks.

In this technical scheme, separate into two regions with sliding tray and holding tank through the fixture block for the concertina movement of push rod can not influence each other with popping out of the tray of SIM card.

Preferably, in the cartridge assembly of the present invention, the sliding groove is a tubular channel, and an inner diameter of the tubular channel is greater than or equal to an outer diameter of the push rod.

In the technical scheme, the push rod is limited in the tubular channel, the telescopic movement path of the push rod is limited and linear, and when the thimble pushes the push rod, the push rod moves in the tubular channel.

Preferably, in the card socket assembly of the present invention, the fixing portion includes a support and a rotating shaft, the support is integrally formed with the bottom of the groove, the rotating shaft is disposed on the support, the connecting rod is connected to the rotating shaft and rotates around the rotating shaft, and the height of the fixing portion is less than or equal to the thickness of the accommodating groove along the direction from the front housing to the main board.

In this technical scheme, the support provides the fixed point for the pivot, and the pivot provides the fulcrum of turning moment for the tray that the connecting rod released the SIM card, and the height that highly is less than or equal to the holding tank of the whole fixed part of constituteing by support and pivot to when realizing reducing thickness, the function that the tray of SIM card was released to the connecting rod is not influenced.

Preferably, in the card socket assembly of the present invention, a bottom expansion slot is provided at a bottom end of the sliding slot near a bottom of the groove, and the push rod and the link are connected to the bottom expansion slot.

In this technical scheme, one side and the sliding tray of bottom expansion groove are linked together, and the opposite side is linked together with the holding tank, and the position that push rod and connecting rod are connected is arranged in bottom expansion groove, and when push rod concertina movement, the position that push rod and connecting rod are connected can take place the motion and can not receive the restriction in bottom expansion groove, makes the motion that the tray of SIM card was released to the connecting rod not influenced.

Preferably, in the card socket assembly of the present invention, a top expanding slot is disposed at a top end of the sliding slot close to the top of the groove, and a top abutting portion is disposed at a top end of the push rod close to the top of the groove, and the top abutting portion is accommodated in the top expanding slot and can move in the top expanding slot.

In this technical scheme, when the thimble promoted the push rod, the setting of top enabled the push rod to have sufficient contact surface and thimble contact, guaranteed the high-efficient conduction of power, and the setting of top expansion groove makes the top have sufficient movement space, also can guarantee that the thimble has sufficient depth of insertion so that the distance that the connecting rod can push out the tray of SIM card recess is enough taken out by hand.

Preferably, in the card socket assembly of the present invention, the edge of the front shell located on the same side as the top of the groove is provided with a jack, the jack is communicated with the top extension groove, and the abutting surface of the abutting portion is opposite to the jack.

In the technical scheme, the arrangement of the jack can provide guidance and limit for the thimble, so that the thimble can make linear motion in the jack in parallel with the ejection direction of the tray of the SIM card, and the force applied to the abutting part by the insertion motion of the thimble cannot be lost.

Preferably, in the card socket assembly of the present invention, the main board and the front case are fixed together by a fixing member.

In this technical scheme, the mounting can provide extra reinforcing effect, strengthens the intensity of cassette subassembly.

A mobile terminal comprising a rear housing assembled with a front housing, and a card holder assembly as described above, the main board and the terminal card holder being located between the front housing and the rear housing.

In this technical scheme, because need not to set up in the card holder subassembly and glue the position and come fixed terminal cassette, but make separable integrated configuration with the terminal cassette, the shell is fixed with preceding shell, and the card that is equipped with PIN partial structure holds in the palm fixed with the mainboard, when the thickness between shell and the backshell before reducing, also guarantees that the intensity of terminal cassette is not influenced.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

according to the card holder assembly and the mobile terminal with the same, the functional PIN part electrically connected with the mainboard is structurally arranged on the card holder, the shell and the front shell of the mobile terminal are combined into a whole, and the combination of the card holder and the shell can be realized through the combination and fixation of the front shell and the mainboard.

Drawings

Fig. 1 is a schematic end view of a card-holder assembly according to embodiment 1 of the present invention.

Fig. 2 is an exploded view of the card-holder assembly according to embodiment 1 of the present invention.

Fig. 3 is an exploded view of a terminal card holder in the card holder assembly according to embodiment 1 of the present invention.

Fig. 4 is a schematic view illustrating a card holder of the card-holder assembly according to embodiment 1 of the present invention assembled on a motherboard.

Fig. 5 is a schematic structural diagram of a groove on a front housing in the card holder assembly according to embodiment 1 of the invention.

Fig. 6 is a schematic view of the card holder assembly according to embodiment 1, in which the housing is fixed to the front shell, and the SIM card tray is not ejected.

Fig. 7 is a schematic view of the card holder assembly according to embodiment 1, in which the housing is fixed on the front shell, and the thimble is inserted into the jack, so that the tray of the SIM card is ejected.

Fig. 8 is a partial schematic view of a slide groove in the card holder assembly according to embodiment 1 of the present invention.

Fig. 9 is a partial schematic view of a slide groove in the card holder assembly according to embodiment 2 of the invention.

Fig. 10 is a schematic structural diagram of a mobile terminal according to embodiment 3 of the present invention.

Description of the reference numerals:

front shell 1

Groove 11

Accommodating groove 111

Fixed part 112

Support 1121

Rotating shaft 1122

Sliding groove 113

Latch 114

Bottom expansion slot 115

Top expansion slot 116

Jack 12

Main board 2

Terminal card holder 3

Outer casing 31

Push rod mechanism 32

Push rod 321

Butting part 3211

Connecting rod 322

Card holder 33

Tray 4

Thimble 5

Rear shell 6

Hollow space 7

Detailed Description

The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Example 1

Embodiment 1 of the invention discloses a cartridge assembly.

As shown in fig. 1 to 3, the card holder assembly includes a front case 1, a main board 2 and a terminal card holder 3, the terminal card holder 3 is disposed between the front case 1 and the main board 2, and the terminal card holder 3 includes a housing 31, a push rod mechanism 32 and a card holder 33; the shell 31 is fixed in the groove 11 of the inner surface of the front shell 1 facing the mainboard 2, the card holder 33 is fixed on the upper surface of the mainboard 2 facing the front shell 1, and the shell 31 and the card holder 33 can be separately combined together and form a cavity 7 between the shell 31 and the card holder 33; the pusher mechanism 32 is disposed in the recess 11 and extends into the cavity 7. Wherein the push rod mechanism 32 can be located at the edge of the groove 11 or at a distance from the edge of the groove 11, the push rod mechanism 32 can be preferably arranged at the edge of the housing 31 or can be preferably arranged around the outside of the housing 31.

The card holder assembly in this embodiment adopts the terminal card holder 3 with a separable structure, in the terminal card holder 3, the shell 31 and the card holder 33 can be connected and fixed through a quick connection assembly, for example, the periphery of the shell 31 is configured to have a structure in which a plurality of card holes are sequentially arranged, correspondingly, a plurality of elastic card strips are arranged around the card holder 33, and the surface of the card strip is preferably circular arc. When the card holder 33 contacts the shell 31, the card strip is pressed and bent inwards until the card strip moves to the position of the card hole, the card strip is buckled in the card hole, and finally the shell 31 and the card holder 33 are quickly and firmly combined together. Conversely, if need be with shell 31 and the separation of card support 33, because the surface of card strip can be arc, under the effect of external force, the card strip can withdraw from the card hole fast to realize shell 31 and the quick separation of card support 33.

In the card seat subassembly of this embodiment, along the direction of preceding shell 1 to mainboard 2, the thickness of shell 31 is less than or equal to the thickness of recess 11, the thickness that the card held in the palm is less than or equal to the thickness of recess 11, this kind of structure can eliminate the clearance between preceding shell 1 and the mainboard 2, make the thickness of mainboard 2 and preceding shell 1 diminish, through holding in the palm 33 with the mainboard 2 combination, the mode of shell 31 and preceding shell 1 combination, the thickness that has originally existed in card support 33 and shell 31 between mainboard 2 and preceding shell 1 has been reduced, the intensity that originally provided by gluing the position now provides through the combination of shell 31 and preceding shell 1, guaranteed that the intensity of preceding shell 1 can not receive the influence, finally realize the purpose that the thickness reduces.

Referring to fig. 4 to 8, in the card holder assembly of the present embodiment, the groove 11 has a receiving groove 111, a fixing portion 112 and a sliding groove 113, the receiving groove 111 is used for fixing the housing 31, the fixing portion 112 is disposed at the bottom of the groove 11, and the sliding groove 113 is opened at the side of the groove 11 and is adjacent to the receiving groove 111; the push rod mechanism 32 includes a push rod 321 and a connecting rod 322, the push rod 321 is movably connected to the connecting rod 322, the push rod 321 is slidably disposed in the sliding groove 113, the connecting rod 322 is pivotally connected to the fixing portion 112, and the sliding of the push rod 321 drives the connecting rod 322 to rotate.

In the card holder assembly of this embodiment, the structure of the recess 11 is divided into three parts, namely, a receiving groove 111, a fixing portion 112 and a sliding groove 113, the housing 31 is fixed in the receiving groove 111 to provide strength to the front shell 1, the fixing portion 112 provides a pivot for the rotation of the link 322, so that the link 322 can extend into the cavity 7 between the housing 31 and the card holder 33 under the driving of the push rod 321 to push out the tray 4 of the SIM card, and the sliding groove 113 can provide guiding and partial supporting functions for the telescopic movement of the push rod 321.

However, if a certain separation structure is not provided between the sliding groove 113 and the receiving groove 111, since the force applied to the tray 4 of the SIM card by the link 322 is not in the same direction as the ejecting direction of the tray 4 of the SIM card but is applied to the tray 4 of the SIM card in a direction inclined toward the sliding groove 113, the inward retracting movement of the push rod 321 and the outward ejecting movement of the tray 4 of the SIM card are easily affected by each other when the tray 4 of the SIM card is ejected by using the link 322.

Therefore, as shown in fig. 8, in the present embodiment, the sliding groove 113 is separated from the receiving groove 111 by a plurality of latch blocks 114, and the push rod 321 is latched in the latch blocks 114. The sliding groove 113 and the receiving groove 111 are divided into two areas by the latch 114, so that the telescopic movement of the push rod 321 and the ejection of the SIM card tray 4 do not interfere with each other.

Further, in the card seat assembly of the present embodiment, the fixing portion 112 includes a support 1121 and a rotation shaft 1122, the support 1121 is integrally formed with the bottom of the recess 11, the rotation shaft 1122 is disposed on the support 1121, the link 322 is connected to the rotation shaft 1122, and the link 322 rotates around the rotation shaft 1122, and in a direction from the front housing 1 to the main board 2, a height of the fixing portion 112 is less than or equal to a thickness of the receiving groove 111.

The support 1121 provides a fixing point for the rotating shaft 1122, the rotating shaft 1122 provides a fulcrum for the lever 322 to push out the tray 4 of the SIM card, and the height of the whole fixing portion 112 formed by the support 1121 and the rotating shaft 1122 is less than or equal to the height of the accommodating groove 111, so that the function of the lever 322 to push out the tray 4 of the SIM card is not affected while the thickness is reduced.

In the cartridge assembly of this embodiment, in order to make the degree of freedom of the extension and contraction movement of the push rod 321 and the rotation movement of the link 322 higher, a larger space is required at the connecting portion of the push rod 321 and the link 322, and therefore, the bottom expansion groove 115 is provided at the bottom end of the sliding groove 113 near the bottom of the groove 11, and the push rod 321 and the link 322 are connected to the bottom expansion groove 115.

Thus, one side of the bottom expansion slot 115 is communicated with the sliding slot 113, the other side is communicated with the accommodating slot 111, the connecting part of the push rod 321 and the connecting rod 322 is positioned in the bottom expansion slot 115, and when the push rod 321 extends and retracts, the connecting part of the push rod 321 and the connecting rod 322 can move in the bottom expansion slot 115 without being limited, so that the movement of the connecting rod 322 for pushing out the tray 4 of the SIM card is not influenced.

In the card socket assembly of this embodiment, the top end of the sliding groove 113 near the top of the groove 11 is provided with a top expanding groove 116, the top end of the push rod 321 near the top of the groove 11 is provided with a top portion 3211, and the top portion 3211 is accommodated in the top expanding groove 116 and can move in the top expanding groove 116.

When the push rod 321 is pushed by the ejector pin 5, the abutting portion 3211 is configured to enable the push rod 321 to have a sufficient contact surface to contact the ejector pin 5, so as to ensure efficient force transmission, and the top expansion groove 116 is configured to enable the abutting portion 3211 to have a sufficient movement space, so as to ensure that the ejector pin 5 has a sufficient insertion depth so that the link 322 can push the tray 4 of the SIM card out of the slot 11 by a sufficient distance for manual removal.

Further, in the card seat assembly of this embodiment, the edge of the front shell 1 located on the same side as the top of the groove 11 is provided with the insertion hole 12, the insertion hole 12 is communicated with the top expanding groove 116, and the abutting top surface of the abutting portion 3211 faces the insertion hole 12.

When the thimble 5 is used to push the push rod 321, the abutting portion 3211 on the push rod 321 needs to be aligned accurately, so that the force acting on the thimble 5 can be transmitted to the push rod 321 almost without loss, and in the socket assembly of the present embodiment, the arrangement of the insertion hole 12 can provide a guide and a limit for the thimble 5 to make a linear motion in the insertion hole 12 parallel to the ejection direction of the tray 4 of the SIM card, so that the force applied to the abutting portion 3211 by the insertion motion of the thimble 5 is not lost.

In the card holder assembly of the present embodiment, the main board 2 and the front case 1 are fixed together by a fixing member combination. The fixing piece in the card seat assembly of the embodiment can provide an additional reinforcing effect and strengthen the strength of the card seat assembly. Wherein, the mounting can adopt any can with preceding shell 1 and mainboard 2 fastening, pin, do not take place relative displacement's structure, for example, the mounting can be a plurality of screws of arranging on mainboard 2, pins mainboard 2 and preceding shell 1 through a plurality of screws, the mounting also can be a plurality of buckles of arranging in the front around shell 1, through with a plurality of buckle block with mainboard 2 and preceding shell 1 combination together around mainboard 2.

In the actual assembly process, the worker aligns the position of the card support 33 and the shell 31 firstly, then directly attaches the mainboard 2 to the inner surface of the front shell 1, and finally locks the mainboard 2 and the front shell 1 through the fixing piece, so that the card seat assembly formed after the assembly only has the thickness of the mainboard 2 and the shell 31, the thickness of the terminal card seat 3 is eliminated, the cavity 7 formed in the terminal card seat 3 can be used for inserting the tray 4 of the SIM card, and the strength of the front shell 1 is still ensured because the shell 31 is fixed in the groove 11 of the front shell 1.

As shown in fig. 6 and fig. 7, in an actual use process, a user inserts the thimble 5 into the insertion hole 12, when the thimble 5 contacts the abutting portion 3211 of the push rod 321, then the thimble 5 continues to move to push the abutting portion 3211 to retract the push rod 321 along the sliding groove 113, the retraction movement of the push rod 321 drives the end of the connecting rod 322 connected to the push rod 321 to retract, at this time, the other end of the connecting rod 322 rotates outwards around the rotating shaft 1122, the rotation movement of the connecting rod 322 pushes the tray 4 of the SIM card to eject outwards, and when the push rod 321 contacts the bottom wall of the bottom expanding groove 115, the ejection distance of the tray 4 of the SIM card is just enough for the user to have enough space to grasp the outer edge of the tray 4 to pull out the tray 4.

Example 2

Embodiment 2 of the invention discloses a cartridge assembly.

The cartridge assembly of the present embodiment is different from embodiment 1 in that the structure of the sliding groove 113 is different in the cartridge assembly of the present embodiment.

As shown in fig. 9, in the cartridge assembly of the present embodiment, the sliding groove 113 is a tubular passage having an inner diameter greater than or equal to an outer diameter of the push rod 321.

In this way, the push rod 321 is defined in a tubular channel, the path of its telescopic movement is defined and linear, and when the thimble 5 pushes the push rod 321, the push rod 321 moves in the tubular channel.

Example 3

As shown in fig. 10, embodiment 3 of the present invention discloses a mobile terminal, which includes a rear housing 6 and a card socket assembly as described in any of the above embodiments, wherein the rear housing 6 is assembled with the front housing 1, and the main board 2 and the terminal card socket 3 are both located between the front housing 1 and the rear housing 6.

In the mobile terminal in the prior art, if the glue position is arranged on the front shell 1 to fix the terminal card holder 3, the overall thickness of the front shell 1 and the rear shell 6 is increased, and the requirement of lightness and thinness cannot be met; if not set up gluey position in the front on shell 1, only directly paste terminal cassette 3 and establish and fix on mainboard 2, then can because do not fix between shell 31 of terminal cassette 3 and mobile terminal's the preceding shell 1 and cause the problem that preceding shell 1 intensity is relatively weak, have the quality hidden danger. In the mobile terminal of this embodiment, since the terminal card holder 3 is fixed without setting a glue position in the card holder assembly, but the terminal card holder 3 is made into a separable combined structure, the housing 31 is fixed with the front case 1, the card holder 33 with the PIN part structure is fixed with the main board 2, and when the thickness between the front case 1 and the rear case 6 is reduced, the strength of the terminal card holder 3 is also guaranteed to be unaffected.

According to the card seat assembly and the mobile terminal with the same, the functional PIN part electrically connected with the mainboard is structurally arranged on the card support, the shell and the front shell of the mobile terminal are combined into a whole, the combination of the card support and the shell can be realized through the combination and fixation of the front shell and the mainboard, the thickness of the whole mobile terminal can be reduced while the same PIN part function and the tray ejection function of an SIM card are realized, and the strength of the front shell can be ensured.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A card seat assembly comprises a front shell, a main board and a terminal card seat, wherein the terminal card seat is arranged between the front shell and the main board and comprises a shell, a push rod mechanism and a card support;

the method is characterized in that:

the shell is fixed in a groove of the inner surface of the front shell facing the mainboard, the card holder is fixed on the upper surface of the mainboard facing the front shell, and the shell and the card holder are detachably combined together to form a cavity between the shell and the card holder;

the push rod mechanism is arranged in the groove and extends into the cavity;

the groove is provided with an accommodating groove, a fixing part and a sliding groove, the accommodating groove is used for fixing the shell, the fixing part is arranged at the bottom of the groove, and the sliding groove is formed in the side part of the groove and is adjacent to the accommodating groove;

the push rod mechanism comprises a push rod and a connecting rod, the push rod is movably connected with the connecting rod, the push rod is arranged in the sliding groove in a sliding mode, the connecting rod is pivoted to the fixing portion, and the push rod slides to drive the connecting rod to rotate;

the sliding groove and the accommodating groove are separated by a plurality of clamping blocks, and the push rod is clamped in the clamping blocks.

2. The cartridge assembly of claim 1, wherein the sliding channel is a tubular channel having an inner diameter greater than or equal to an outer diameter of the push rod.

3. The cartridge assembly of claim 1, wherein the fixing portion comprises a support and a shaft, the support is integrally formed with the bottom of the recess, the shaft is disposed on the support, the link is connected to the shaft and rotates around the shaft, and a height of the fixing portion is less than or equal to a thickness of the receiving groove along a direction from the front housing to the main board.

4. The cartridge assembly of claim 1, wherein the sliding groove has a bottom extension groove formed at a bottom end thereof adjacent to a bottom of the recess, and the push rod and the link are coupled to the bottom extension groove.

5. The card socket assembly of claim 4, wherein the sliding slot is provided with a top expansion slot near the top of the groove, and the pushing rod is provided with a top abutment near the top of the groove, the top abutment being received in the top expansion slot and being movable in the top expansion slot.

6. The card socket assembly of claim 5, wherein the front shell has a jack at the edge on the same side as the top of the groove, the jack is communicated with the top expansion slot, and the abutting surface of the abutting portion faces the jack.

7. The cartridge assembly of claim 1, wherein the main board and the front housing are secured together by a fastener assembly.

8. A mobile terminal, characterized in that the mobile terminal comprises a rear housing and a card holder assembly according to any one of claims 1 to 7, the rear housing being assembled with the front housing, the main board and the terminal card holder being located between the front housing and the rear housing.