CN211556226U - Stack type card seat - Google Patents

Abstract

The application provides a heap cassette, including weld terminal module on printed circuit board, weld in shielding casing on the printed circuit board, be formed at printed circuit board with shield accommodating space between the casing and can in the card of plug in the accommodating space holds in the palm, the card holds in the palm including holding the card space and being located hold the vertical arm of the horizontal both sides in card space, vertical arm orientation the downward protrusion in bottom of printed circuit board is formed with and supports in the last support bar of printed circuit board, the top of vertical arm is spacing in shield on the casing. The application can reduce the thickness of the product.

Description

Stack type card seat

Technical Field

The present disclosure relates to electrical connectors, and more particularly to a stacked card socket.

Background

The memory of the mobile phone generally has two existing modes, namely a built-in memory (ROM) and an extended memory (T-Flash). The price of the built-in memory is high, and a memory expansion card seat is reserved by a general mobile phone manufacturer for a user to select an expansion memory. Meanwhile, an identity module (SIM) is a number card that a mobile phone must be installed, and generally, a SIM card holder and a TF card holder are respectively installed on the mobile phone for inserting various electronic cards. The patent of the republic of china CN209183801U discloses a stacked all-in-one card holder, which comprises a first terminal module arranged on a printed circuit board, a second terminal module formed on the top wall of a metal shell and a card holder moving between the first end module and the second end module, wherein the upper side and the lower side of the card holder are provided with a first card and a second card which are respectively in electric contact with the first terminal module and the second terminal module. The above only solves the problem of the upper and lower card structures, but the technical scheme that the market needs 2 SIM cards and 1 TF expansion card does not solve the problem, and along with the powerful functions of the camera, the requirement for UHS (ultra high speed) TF cards is also enhanced, and how to solve the stability of the high-frequency transmission performance is very important.

The traditional card support is vertically limited by a plurality of supporting parts formed by inwards bending the top wall and the side wall of the shielding shell, so that the supporting parts for shielding the thickness of the shell are required to be increased, and the thickness of the card seat is increased.

SUMMERY OF THE UTILITY MODEL

Therefore, it is desirable to provide a stacked card socket for limiting the card holder up and down by shielding the housing and the printed circuit board, so as to reduce the overall thickness of the product.

In order to solve the above technical problem, the present application provides a stack-type card socket, including weld terminal module on printed circuit board, weld in shielding casing on the printed circuit board, be formed at printed circuit board with shield accommodating space between the casing and can in the card of accommodating space plug holds in the palm, the card holds in the palm including holding the card space and being located hold the vertical arm of the horizontal both sides in card space, vertical arm orientation printed circuit board's bottom downward protrusion is formed with and supports in the last support bar of printed circuit board, the top of vertical arm is spacing in shield on the casing.

Preferably, the support strip is of a structure with a wide top and a narrow bottom, and the narrow bottom of the support strip supports and slides on the printed circuit board.

Preferably, the outer side of the upper surface of the longitudinal arm is provided with a limiting groove, the shielding shell comprises a top wall and side walls formed by downward and vertical bending and extending from the two transverse sides of the top wall, the top wall comprises a main board part and a front board part located at the front end of the main board part, the side walls are formed by bending the two transverse sides of the main board part, and the two transverse sides of the front board part are bent downward to form limiting walls pressed in the limiting groove.

Preferably, the card holder further comprises a front end portion formed at the front end of the partition plate, a cover portion formed in front of the front end portion, and a tail arm formed at the rear end of the partition plate, the limiting groove is formed with a limiting wall at the front end portion, and the limiting wall is limited by the limiting wall to prevent the card holder from being excessively inserted.

Preferably, the width between a pair of the limiting walls is smaller than the width between a pair of the side walls, and the lower ends of the limiting walls are bent outwards perpendicularly and extended to form pressing parts pressed on the upper surfaces of the limiting grooves.

Preferably, the division board is the metal sheet material, division board periphery integrated injection moulding has the plastic body, the plastic body includes vertical arm, tail arm and preceding tip, vertical arm, tail arm and preceding tip are in the upper surface of division board encloses to establish and is formed with the first card space of holding, vertical arm, tail arm and preceding tip are in the lower surface of division board encloses to establish and is formed with second, the third of arranging on longitudinal direction and holds the card space, preceding tip includes and extends into to the protrusion first, the third of holding the card space press from both sides the card portion, vertical arm is located the second holds card space position department and is equipped with protruding the income the second in the card space presss from both sides the card portion.

Preferably, the terminal module includes two first terminal modules welded to the upper surface of the printed circuit board and corresponding to the second and third card accommodating spaces and a second terminal module fixed to the top wall of the shielding shell and corresponding to the first card accommodating space, the first card accommodating space is a TF card slot, and the second and third card accommodating spaces are SIM card slots.

Preferably, the second terminal module includes a second terminal set and a second insulator which is formed by injection molding of the second terminal set into a whole, and each conductive terminal of the second terminal set includes an elastic arm extending downward into the receiving space, an extending portion extending from a rear end of the elastic arm to be embedded into the second insulator, and a solder leg bending downward from a rear end of the extending portion and extending to a surface of the printed circuit board for soldering.

Preferably, the second insulator is formed by injection molding and then integrally holds the second terminal group and the shielding shell.

Preferably, one of the longitudinal arms is provided with an installation opening at the inner side of the second accommodating space, the second clamping portion is installed and fixed in the installation opening, the partition body is provided with a notch at a position corresponding to the installation opening, the installation opening includes a step portion and an installation hole formed by penetrating through the step portion along the notch, the second clamping portion includes a base portion fixed in the installation opening and an elastic strip body extending into the second accommodating space from the base portion, the elastic body elastically supports against an edge of a SIM card placed in the second accommodating space, the second clamping portion further includes a position avoiding portion arranged at the lower side of the base portion to avoid the step portion and a fixed cylinder formed by protruding from the bottom side of the base portion and fixed in the installation hole.

The utility model provides a heap cassette is through the card holds in the palm the vertical arm bottom downward protrusion form direct sliding contact in support bar on the printed circuit board makes the card hold in the palm the upper and lower spacing pass through shield the casing from the top suppress with printed circuit board supports under and realizes, can avoid prior art need inwards bend on the lateral wall that shields the casing hold in the palm the card holds in the palm and cause the thickening the technical problem of cassette.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.

FIG. 1 is a perspective view of a stacked card holder according to the present application;

FIG. 2 is an exploded perspective view of the stacked card holder of the present application with the holder removed;

FIG. 3 is a perspective view of the stacked card socket of the present application with the printed circuit board removed and the first terminal module thereon;

fig. 4 is a perspective view of the shielding shell, the second terminal module and the card withdrawing mechanism of the stacked card holder of the present application;

FIG. 5 is a perspective view of a shielding shell of the stacked card socket of the present application;

FIG. 6 is a perspective view of a second terminal module of the stacked cartridge of the present application;

FIG. 7 is a perspective view of another angle of the second terminal module of the stacked cartridge of the present application;

fig. 8 is a perspective view of a second terminal set of the stacked card socket of the present application;

FIG. 9 is a sectional view taken along the line A-A of FIG. 6 and a partial enlarged view thereof;

FIG. 10 is a cross-sectional view of the second terminal set of FIG. 9 shown in an operative position after insertion of the TF card;

FIG. 11 is a perspective view of the card holder of the present application with a TF card;

FIG. 12 is a perspective view of the card holder of the present application;

FIG. 13 is a perspective view of the card holder of the present application from another angle;

FIG. 14 is a perspective view of a metal insert of the card holder of the present application;

fig. 15 is a perspective view and a partial enlarged view of the third elastic card element of the present application with the card holder removed;

fig. 16 is a perspective view of a third resilient clip member of the present invention;

FIG. 17 is a perspective view of a card holder of the present application supported on a printed circuit board;

fig. 18 is a sectional view taken along the line B-B shown in fig. 17.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. The card withdrawing direction X shown in figure 1 is taken as the longitudinal front direction in the application; the Y direction is taken as the transverse right direction; the Z direction is taken as the vertical upper direction.

Referring to fig. 1 to 5, the stacked card socket of the present application includes a first terminal module 60 soldered on a printed circuit board 10, a shielding shell 30, a second terminal module 40 disposed on an inner side of the shielding shell 30, a card ejecting mechanism 50 assembled on one lateral side of the shielding shell 30, an insulating body 30, a first terminal set 40 disposed on a top wall 31 of the insulating body 30, a receiving space (not numbered) formed between the first terminal module 60 and the second terminal module 40, and a card holder 20 moving in the receiving space.

Referring to fig. 5, the shielding shell 30 includes a base 31 and two side walls 32 formed by bending and extending downward from two lateral sides of the base 31. The base 31 includes a main body plate 311 and a front plate 312 extending forward from the main body plate 311, the side walls 32 are formed by bending and extending from two lateral sides of the main body plate 311, the two lateral sides of the front plate 312 are bent and extending downward to form limiting walls 33, and the width between the limiting walls 33 is smaller than the width between the side walls 32. The main body plate 311 is provided with a window 313, a connecting beam 314 is arranged in the middle of the window 313 in the transverse direction, a switch static terminal 315 formed by bending and extending downward from the middle of the rear end of the main body plate 311, a blocking wall 316 formed by bending and extending downward from two transverse sides of the rear end of the main body plate 311, and a riveting hole 317 arranged at a position of the main body plate 311 close to the blocking wall 316. The lower ends of the side wall 32, the limiting wall 33 and the blocking wall 316 are bent to form soldering portions 322, 331, 318 soldered on the printed circuit board 10.

One of the two side walls 32 is formed with an elastic piece 321 extending into the receiving space to apply an elastic force to the card holder 20, and the inner side of the other side wall 32 is formed with a mounting portion for mounting the card ejecting mechanism 50. The main plate 311 inside the mounting portion is torn downward to form the elastic piece 321, the mounting portion is located between the elastic piece 321 and the sidewall 32, and the elastic piece 321 on one side of the mounting portion includes an elastic portion extending into the accommodating space, connecting portions 323 located on both longitudinal sides of the elastic portion and connected to the main plate 311, and pressing pieces 324 formed at both longitudinal ends of the elastic piece 321 and extending toward the sidewall 32 to apply elastic force. The distance between the two stopper walls 33 is smaller than the distance between the two side walls 32 but smaller than the minimum distance between the pair of elastic pieces 321 extending in. The back end of the side wall 32 without the installation part is torn inwards to form a limit hook 325 which protrudes into the accommodating space.

The card ejecting mechanism 50 includes a push rod 51 installed in the installation portion of the shielding housing 30, a cam 52 riveted to the riveting hole 317, and a rivet 53 for riveting the cam 52 in the riveting hole 317. The card ejecting mechanism 50 is well known in the art and will not be described herein.

The first terminal module 60 includes two SIM card terminal modules 61, 62 arranged in a longitudinal direction, and each of the SIM card terminal modules 61, 62 includes a first terminal group and a first insulator that forms the first terminal group into a single body.

Referring to fig. 4 to 10, the second terminal module 40 includes a second terminal set 41 and a second insulator 42 formed on the inner surface of the main plate 311 of the shielding shell 30 and the second terminal set 41. In a specific embodiment, the first terminal module 40 may also be assembled on the inner side surface of the shielding shell 30.

Each conductive terminal of the second terminal set 41 includes an elastic arm 411 extending downward into the receiving space, an extending portion 412 extending backward from the elastic arm 411, and a solder leg 413 bent downward from a rear end of the extending portion 412. All the conductive terminals of the second terminal set 41 are connected to form a whole at the extending portion 412, and the connected portion is cut off after injection molding so as to electrically isolate the conductive terminals from each other. The two conductive terminals at the outermost side extend laterally to form a connecting material belt 414, and the connecting material belt 414 is integrally connected in front to form a combined material belt 415. The composite strip 415 is cut and isolated after injection molding. The second terminal module 40 is a TF card terminal module, specifically a UHS (ultra high speed) TF card terminal module.

The elastic arm 411 of the second terminal set 41 includes a contact portion 4111 extending into the receiving space, first and second elastic arms 4112, 4113 formed by extending the contact portion 4111 obliquely upward to the front and rear sides, respectively, a free end portion 4114 formed by bending the second elastic arm 4112 forward and horizontally extending, and a locking portion 4115 formed between the free end portion 4114 and the second elastic arm 4112. The width of the free end portion 4114 is greater than the width of the detent portion 4115.

The second insulator 42 includes a bonding body 421 bonded to the inner wall surface of the main plate portion 311 of the shield case 30, a deformation opening 422 opened in the bonding body 421 corresponding to the elastic arm 411 of the second terminal group 41, and a rear wall 423 extending downward from the rear end of the bonding body 421. The rear wall 423 is provided with a hole structure 424 corresponding to the riveting hole 317 of the shielding shell 30 for the rivet 53 to pass through, the extending portion 412 of the second terminal set 41 is integrally formed at the rear end of the attaching main body 421, and the solder leg 413 extends out of the bottom surface of the rear wall 423 and is soldered on the printed circuit board 10. The free end portion 4114 of the elastic arm 411 of the second terminal set 41 is located at the front side of the card insertion end compared with the extending portion 412. A limiting portion 425 for limiting the free end portion 4114 is formed on the bonding body 421 in front of the deformation port 422, and the limiting portion 425 includes an extending hole 4251 penetrating the bonding body 421 in the vertical direction, a limiting step 4254 formed by protruding from the bottom side of the limiting portion 425, and an upper limiting beam 4252 and a lower limiting beam 4253 for vertically clamping the upper and lower sides of the locking portion 4115. The upper limit beam 4252 and the lower limit beam 4253 are arranged in a staggered manner in the vertical direction, so that after the second terminal set 41 is injection molded, only one surface of the clamping portion 4115 of the second terminal set 41 is molded on the lower surface of the upper limit beam 4252 and the upper surface of the lower limit beam 4253, and after the contact portion 4111 of the elastic arm 411 is pressed by a TF card, the clamping portion 4115 can be easily separated from the joint surface of the upper limit beam 4252 and the lower limit beam 4253, so that the free end portion 4114 becomes a movable free end. The width of the locking portion 4115 is smaller than that of the free end portion 4114, so that the free end portion 4114 is always located in the extension hole 4251 and cannot be pulled out from the extension hole 4251. The free end portion 4114 is freely movable in the extending hole 4251, and the limiting step 4254 is configured such that the free end of the free end portion 4114 is always located above the limiting step 4254 and cannot enter the accommodating space downward during the maximum downward movement stroke of the free end portion 4114.

The deformation port 422 corresponds to the window 313 of the shielding shell 30, the connecting beam portion 314 is located above the contact portion 4111, and the first and second resilient arms 4112, 4113 are arranged below the window 313 in the longitudinal direction. The connecting beam portion 314 can avoid the problem that the window 313 is too large and the window edge is easily deformed, and the connecting beam portion 314 is located right above the contact portion 4111, the contact portion 4111 is the portion farthest from the body plate portion 311, and when the contact portion 4111 is pressed, the contact portion 4111 still cannot contact the body plate portion 311 upwards and is short-circuited.

In order to use the ultra-high speed TF card, the stacked card socket of the present application needs to make the free end portion 4114 of the second terminal set 41 be located in front of the card insertion side, so that the extension portion 412 and the solder leg 413 directly extend from the elastic arm 411 to the back of the bottom surface of the back wall 423, thereby avoiding the problem that the ultra-high speed signal transmission is affected by the traditional forward insertion manner (i.e. the free end portion 4114 is arranged at the back to make TF inserted forward) that the extension portion 412 and the solder leg 413 need to be bent backward and extended from the front end of the elastic arm 411 in the opposite direction.

The stacked card socket of the present application further includes a movable switch terminal 80 mounted on the rear wall 423 of the second insulator 42, wherein the movable switch terminal 80 includes a fixing portion 81 fixed in the rear wall 423, an abutting portion 83 bent from the fixing portion 81 and extending into the receiving space, and a contact end portion 84 bent from the abutting portion 83 and extending backward and capable of electrically contacting with the stationary switch terminal 315. In an initial state, the contact end 84 is electrically contacted with the switch fixed terminal 315, and after the card holder 20 is inserted, the rear end of the card holder 20 pushes the interference part 83 backwards to disconnect the contact end 84 from the switch fixed terminal 315 and realize a switch function. The rear wall 423 is provided with a space-avoiding hole 4231 at a position corresponding to the contact end 84, a cross beam 4232 connecting two lateral sides of the rear wall 423 is formed at the bottom side of the space-avoiding hole 4231, and the design of the cross beam 4232 is beneficial to reducing the plastic warping problem of the rear wall 423 caused by the space-avoiding hole 4231.

As shown in fig. 11 to 16, the card holder 20 of the present application includes a partition plate 21 and a plastic body 22 formed on the periphery of the partition plate 21. The partition plate 21 includes a partition plate body 211, a through hole 214 opened at the front end of the partition plate body 211, and a notch 213 opened at the lateral outer side of the rear end of the partition plate body 211. The outer periphery 212 of the partition body 211 is molded and embedded in the plastic body 22. The plastic body 22 includes a pair of longitudinal arms 221 formed on the outer peripheral portions 212 of both lateral sides of the partition body 211, a trailing arm 222 formed on the outer peripheral portion 212 of the rear side of the partition body 211, a front end portion 223 formed on the outer peripheral portion 212 of the front side of the partition body 211, and a cover 224 formed at the front end of the front end portion 223. The upper side of the partition board body 211 and the plastic body 22 enclose a first card containing space S1(TF card), and the lower side of the partition board body 211 and the plastic body 22 enclose a second card containing space S2 and a third card containing space S3(SIM card) which are arranged in the longitudinal direction. A partition column 225 is formed between the second and third card receiving spaces S2, S3.

A clamping groove 2213 for clamping the elastic sheet 321 of the shielding shell 30 is arranged on the transverse outer side of the longitudinal arm 221; a limiting groove 2211 is formed in the transverse outer side of the upper surface of the longitudinal arm 221, and a limiting wall 2212 is formed at the front end 223 of the limiting groove 2211. A position limiting notch 2214 is formed in the rear end of the longitudinal arm 221 corresponding to the position limiting hook 325 of the shielding shell 30, and the limiting hook 325 is clamped in the position limiting notch 2214 to prevent the card holder 20 from being excessively inserted. The limiting walls 33 at the two lateral sides of the front plate 312 of the shielding shell 30 slide on the limiting grooves 2211 and are limited on the limiting walls 2212 of the card holder 20 to prevent the card holder 20 from being inserted further. The limiting wall 33 further includes a pressing portion 332 formed by bending outward from the lower end of the limiting wall 33, the pressing portion 332 is pressed in the limiting groove 2211, and the welding portion 331 is formed by bending downward and extending from the pressing portion 332.

The stacked card holder is clamped on the limiting wall 2212 at the front end of the limiting groove 2211 of the card holder through the limiting walls 33 at the two transverse sides of the shielding shell 30, the limiting hook 325 extending into the accommodating space is arranged at the rear end of the side wall 32 of the shielding shell 30, and the limiting notch 2214 matched with the limiting hook 325 is arranged at the rear end of the longitudinal wall 221 of the card holder 20 to realize double clamping and prevent excessive insertion.

A first clipping portion 2231 is formed on the upper side of the front end portion 223 of the plastic body 22 and protrudes towards the first card accommodating space S1, and a third clipping portion 2232 is formed on the lower side of the front end portion 223 and protrudes towards the third card accommodating space S3. The first and third clipping portions 2231, 2232 are elastic structures, and when the first electronic card and the third electronic card are placed in the first and third card accommodating spaces S1, S3, the first and third clipping portions 2231, 2232 are abutted against the outer edges of the first and third electronic cards to prevent the first and third electronic cards from falling off. A second clamping portion 23 is mounted or formed on the longitudinal arm 221 of the plastic body 22 at the second card accommodating space S2, and the second clamping portion 23 is used for abutting against a second electronic card placed in the second card accommodating space S2 to prevent the second electronic card from falling off. The longitudinal arm 221 is provided with an installation opening 24 at a position corresponding to the second clipping portion 23, and the installation opening 24 includes a step portion 241 near the second clipping space S2 and an installation hole 242 correspondingly communicated with the notch 213 of the partition plate 21. The second clipping portion 23 includes a base portion 231 accommodated in the mounting opening 24, a relief portion 232 formed below the base portion 231 to avoid the step portion 241, a fixed column 233 fixed in the mounting hole 242, and a plurality of elastic bodies 234 protruding from the inner side of the base portion 231 and extending into the second clipping accommodating space S2. The second clamping portion 23 is made of flexible plastic material, such as silica gel, and the elastic body 234 abuts against the second electronic card to prevent the second electronic card from falling off.

Since the longitudinal lengths of the two SIM cards are greater than the longitudinal length of one TF, the first clipping portion 2231 is located further back than the third clipping portion 2232. The partition plate 21 and the plastic body 22 of the card holder may also be directly and integrally formed by metal processing, such as an integrated structure manufactured by powder metallurgy and die casting, and at this time, the first and third clipping portions 2231 and 2232 need to be arranged in an installation manner such as the second clipping portion 23.

The card holder 20 of the present application is provided with a first card accommodating space S1 suitable for TF card at the upper side, and two second and third card accommodating spaces S2, S3 suitable for SIM card longitudinally arranged at the lower side, and the front end 223 of the plastic body 22 protrudes toward the first and third card accommodating spaces S1, S3 to form a first and third clamping portion 2231, 2232 to keep the first and third electronic cards from falling off when they are turned over; in order to solve the problem that the second card receiving space S2 holds the second electronic card without falling off, a second clamping portion 23 is disposed on the longitudinal arm 221 corresponding to the second card receiving space S2. The card support realizes the technical scheme of integrating two SIM cards and one TF card.

As shown in fig. 13, 17 and 18, the bottom of the longitudinal arm 221 of the card holder 20 protrudes downward to form a support strip 2215, the support strip 2215 is directly supported on the printed circuit board 10 to slide, and the upper side of the card holder 20 is limited below the top wall 31 of the shielding shell 30, and is mainly limited downward by the limiting wall 33 abutting against the limiting groove 2211 on the upper side of the longitudinal arm 221 of the card holder 20, so that a holding structure for holding the card holder 20 does not need to be formed by inward folding on the side wall 32 of the shielding shell 30, and the thickness of the product is further reduced.

The supporting strip 2215 is wide at the top and narrow at the bottom, so that the contact sliding area between the supporting strip 2215 and the printed circuit board 10 is reduced, the space of the printed circuit board 10 is prevented from being excessively occupied, and the problem that the friction force is excessively large due to the excessively large contact area to damage the printed circuit board 10 is also avoided.

The stackable card holder of the application forms the support bar 2215 which is in direct sliding contact with the printed circuit board 10 by protruding downwards at the bottom of the longitudinal arm 221 of the card holder 20, so that the upper and lower limiting of the card holder 20 is realized by pressing the shielding shell 30 from the top and supporting the printed circuit board 10 from the bottom, and the technical problem that the card holder 20 needs to be supported and held by bending inwards on the side wall 32 of the shielding shell 30 to thicken the card holder in the prior art can be avoided.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. A stacked card holder comprises a terminal module welded on a printed circuit board, a shielding shell welded on the printed circuit board, an accommodating space formed between the printed circuit board and the shielding shell and a card holder capable of being inserted into and pulled out of the accommodating space, wherein the card holder comprises a card accommodating space and longitudinal arms positioned at two transverse sides of the card accommodating space, the stacked card holder is characterized in that the longitudinal arms are downwards protruded towards the bottom of the printed circuit board to form support bars supported on the printed circuit board, and the upper parts of the longitudinal arms are limited on the shielding shell.

2. The stacked cartridge of claim 1, wherein the support bars are of a wide top and narrow bottom configuration, and the narrower bottom portions of the support bars support the printed circuit board for sliding movement thereon.

3. The stacked card holder of claim 2, wherein the outer side of the upper surface of the longitudinal arm is provided with a limiting groove, the shielding shell comprises a top wall and a side wall formed by bending and extending downward from two lateral sides of the top wall, the top wall comprises a main plate portion and a front plate portion located at the front end of the main plate portion, the side wall is formed by bending from two lateral sides of the main plate portion, and two lateral sides of the front plate portion are bent downward to form a limiting wall pressed in the limiting groove.

4. The stacked cartridge according to claim 3, wherein the cartridge holder further comprises a front end portion formed at a front end of the divider plate, a cap portion formed in front of the front end portion, and a tail arm formed at a rear end of the divider plate, and the catching groove is formed at the front end portion with a catching wall caught by the catching wall to prevent the cartridge holder from being excessively inserted.

5. The stacked cassette of claim 4 wherein the width between a pair of said retaining walls is less than the width between a pair of side walls, and the lower ends of said retaining walls are bent perpendicularly outwardly to form a pressing portion pressed against the upper surface of said retaining groove.

6. The stacked card holder of claim 4, wherein the dividing plate is made of metal plate, a plastic body is integrally injection-molded on the periphery of the dividing plate, the plastic body comprises the longitudinal arm, the tail arm and the front end portion, the longitudinal arm, the tail arm and the front end portion form a first card accommodating space on the upper surface of the dividing plate, the longitudinal arm, the tail arm and the front end portion form a second card accommodating space and a third card accommodating space arranged in the longitudinal direction on the lower surface of the dividing plate, the front end portion comprises a first card clamping portion and a third card clamping portion protruding into the first card accommodating space and the third card accommodating space in the rear direction, and the longitudinal arm is provided with a second card clamping portion protruding into the second card accommodating space at the position of the second card accommodating space.

7. The stacked card socket according to claim 6, wherein the terminal module comprises two first terminal modules soldered to the upper surface of the printed circuit board and corresponding to the second and third card receiving spaces, and a second terminal module fixed to the top wall of the shielding shell and corresponding to the first card receiving space, the first card receiving space is a TF card slot, and the second and third card receiving spaces are SIM card slots.

8. The stacked card holder of claim 7, wherein the second terminal module comprises a second terminal set and a second insulator integrally injection-molded with the second terminal set, each conductive terminal of the second terminal set comprises a resilient arm extending downward into the receiving space, an extension portion extending from a rear end of the resilient arm to be embedded in the second insulator, and a solder foot bending downward from a rear end of the extension portion to be soldered to a surface of the printed circuit board.

9. The stacked card holder of claim 8, wherein the second insulator is injection molded to integrally hold the second terminal set and the shielding shell.

10. The stacked card holder according to claim 6, wherein one of the longitudinal arms has a mounting opening at an inner side of the second receiving space, the second clamping portion is mounted and fixed in the mounting opening, the partition body has a notch at a position corresponding to the mounting opening, the mounting opening includes a step portion and a mounting hole formed through the step portion along the notch, the second clamping portion includes a base portion fixed in the mounting opening and an elastic strip extending from the base portion into the second receiving space, the elastic strip elastically supports an edge of the SIM card inserted into the second receiving space, the second clamping portion further includes a clearance portion disposed at a lower side of the base portion to avoid the step portion and a fixing post protruding from a lower side of the base portion and fixed in the mounting hole.

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