Card support type two-out-of-three SIM card seat

Abstract

According to the card support type two-out-of-three SIM card seat provided by the invention, through combination of the first connecting seat, the card support and the second connecting seat, the SIM card seat is divided into a plurality of laminated parts which can be used independently or in a combined manner, a user selects to insert an SIM card or a T card according to actual requirements, and the function flexibility of two-out-of-three is realized. On the basis that the SIM card is inserted into the card support, the second connecting seat for the SIM card or the T card to be inserted is arranged, and the laminated card seat structure enables the whole SIM card seat to increase the functions of the card seat under the condition that the plane space of equipment is not increased. The first bonding pad corresponding to the first connecting seat is arranged at the center of the circuit board, so that the two ends of the circuit board in the length direction can be connected with other electronic devices, the space utilization rate of the circuit board is improved, and the space utilization rate in the equipment is further improved. Meanwhile, through the design of the card support in sliding connection, the user can conveniently replace or adjust the card in the card slot, and the use convenience is improved.

Description

Technical Field

[0001] The invention relates to the field of SIM card sockets, and in particular to a card tray type three-choice-two SIM card socket. Background Art

[0002] In the current mobile communications field, with the rapid development of technology and the continuous changes in market demand, especially the rapid development of industries such as express delivery, the requirements for smartphones and other QR code scanning terminal products are increasing. These products not only need to have a higher level of intelligence, but also require to be thinner, more portable, and integrate more functions to meet diverse usage scenarios. In particular, key components such as battery connectors and SIM card holders require 8 PINs or even more because the battery connector needs to support more PIN pins to realize functions such as battery detection and fuel gauge, resulting in limited space for the SIM card holder next to the battery holder.

[0003] Traditional SIM card holders are often designed with a single card slot or dual card slots, but the layout is not compact enough to meet the current smartphone's demand for efficient use of space. Especially in some devices that need to support multiple SIM cards (such as dual-SIM dual standby) and additional memory cards (such as T cards), traditional SIM card holders often have unreasonable card slot layouts when dealing with the need for multiple card slots, resulting in low space utilization.

[0004] Therefore, it is necessary to provide a card tray type three-choice-two SIM card socket to solve the above technical problems. Summary of the invention

[0005] The invention provides a card tray type three-choose-two SIM card holder, so as to solve the problem that the SIM card holder in the prior art has an unreasonable card slot layout, resulting in low space utilization of the card holder.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a card tray type three-choose-two SIM card holder, which comprises:

[0007] A circuit board, wherein the circuit board is provided with:

[0008] A first solder pad, located in the middle of the top end of the circuit board;

[0009] The second solder pads are provided in two groups, and the two groups of the second solder pads are relatively arranged at two sides of the top of the circuit board; and

[0010] A third solder pad is located at one side of the circuit board in the length direction, and the third solder pad is provided in two groups, and the two groups of the third solder pads are relatively arranged at two sides of the top of the circuit board;

[0011] A first connection socket, arranged above the circuit board, the first connection socket is provided with a first SIM card slot and a first connection terminal, the first SIM card slot is used to place a first SIM card, one end of the first connection terminal is connected to the first SIM card, and the other end of the first connection terminal is connected to the first soldering pad;

[0012] a second connection socket, which is arranged above the first connection socket and connected to the circuit board, a first card slot for inserting the first SIM card is formed between the second connection socket and the first connection socket; the second connection socket is provided with a second card slot for inserting a second SIM card or a T card, a second connection terminal and a third connection terminal are provided on the second connection socket, one end of the second connection terminal is connected to the T card, and the other end of the second connection terminal is connected to the second soldering pad; one end of the third connection terminal is connected to the second SIM card, and the other end of the third connection terminal is connected to the third soldering pad; and

[0013] The card tray is located between the first connection seat and the second connection seat, and the card tray is slidably connected to the circuit board along the length direction, and the card tray is used to carry the first SIM card.

[0014] In the present invention, a plurality of the first solder pads are provided, the plurality of the first solder pads are located at the center of the top end of the circuit board, and the plurality of the first solder pads are provided in two rows, and the plurality of the first solder pads are distributed in a rectangular array;

[0015] There are a plurality of second soldering pads, and the plurality of second soldering pads are arranged in two groups, and the two groups of second soldering pads are respectively arranged at two ends along the width direction of the circuit board;

[0016] Along the length direction of the circuit board, the third pad is located on one side of the second pad. There are a plurality of third pads, and the plurality of third pads are arranged in two groups. The two groups of third pads are arranged at both ends along the width direction of the circuit board respectively.

[0017] In the present invention, the first connecting seat comprises:

[0018] A first card core is arranged above the circuit board; and

[0019] The first connection terminal is arranged on the first card core, and one end of the first connection terminal extends into the first card slot, one end of the first connection terminal is used to connect to the first SIM card, and the other end of the first connection terminal is connected to the first welding pad;

[0020] Among them, a plurality of the first connecting terminals are arranged in a rectangular array.

[0021] In the present invention, the first connecting terminal comprises:

[0022] A first fixing frame connected to the first card core;

[0023] A first elastic sheet is disposed in the first fixing frame and is bent and extended upward, and is used to contact the first SIM card; and

[0024] A first lead-out terminal, one end of which is connected to the first fixing frame, and the other end of which is connected to the first soldering pad on the circuit board;

[0025] Wherein, a set distance is arranged between the first lead-out ends of adjacent first connection terminals.

[0026] In the present invention, an insulating fixing point is provided on the circuit board, and along the projection of the plane where the circuit board is located, the insulating fixing point is located in the first fixing frame;

[0027] The length of the first spring sheet is greater than that of the first fixing frame. One end of the first spring sheet is connected to the first fixing frame, and the other end of the first spring sheet is connected to the insulating fixing point, so that the middle part of the first spring sheet is bent and extends into the first slot.

[0028] In the present invention, the first connecting terminal further comprises a reinforcing sheet, and the reinforcing sheet is arranged on the peripheral side of the first fixing frame; the reinforcing sheet is connected to the first card core.

[0029] In the present invention, the second connecting base comprises:

[0030] A second card core is arranged above the card tray, a second card slot is arranged at the top of the second card core, and the second card slot is used for inserting a SIM card or a T card;

[0031] An iron shell, covering the second card core, with two sides of the iron shell extending downward and welded to the circuit board;

[0032] A second connecting terminal connected to the second card core, one end of the second connecting terminal extending into the second card slot for connecting to the T card, and the other end extending along the width direction of the second card core and connected to the second soldering pad; a plurality of second connecting terminals are provided, and the plurality of second connecting terminals are divided into two groups and are relatively arranged on both sides of the width direction of the second card core; and

[0033] The third connecting terminal is connected to the second card core, and the third connecting terminal is located on the other side of the second connecting terminal along the length direction of the second card core. One end of the third connecting terminal extends into the second card slot, and one end of the third connecting terminal is used to connect the second SIM card. The other end of the third connecting terminal extends in the width direction of the second card core, and the other end of the third connecting terminal is connected to the third soldering pad.

[0034] In the present invention, the second connecting terminal comprises:

[0035] A second spring sheet is arranged at one end of the second connecting terminal, one end of the second spring sheet extends into the second card slot along one side of the length direction of the second card core, the second spring sheet is used to connect the T card, and the second spring sheets of several second connecting terminals in each group are arranged at intervals along the width direction of the second card core;

[0036] A second lead-out end, located at the other end of the second connecting terminal, the second lead-out end is connected to the second solder pad, and the second lead-out ends of the plurality of second connecting terminals in each group are arranged at intervals along the length direction of the second card core; and

[0037] The second extension end is arranged in the middle of the second connecting terminal, and the second extension end connects the second spring piece and the second lead-out end.

[0038] In the present invention, the third connecting terminal comprises:

[0039] A third elastic sheet, arranged at one end of the third connecting terminal, one end of the third elastic sheet extends into the second card slot, the third elastic sheet is used to connect the second SIM card, and the third elastic sheets of the third connecting terminals are distributed in a rectangular array;

[0040] A third lead-out end is arranged at the other end of the third connecting terminal, the third lead-out end is connected to the third soldering pad, and the third lead-out ends of the third connecting terminals in each group are arranged at intervals along the length direction of the second card core; and

[0041] The third extension end is located in the middle of the third connecting terminal. The third extension end is arranged in the second card core. The third extension end connects the third spring piece and the third lead-out end.

[0042] In the present invention, the iron shell comprises:

[0043] A top plate, located above the second card core;

[0044] The third side walls are provided in two groups, and the two groups of the third side walls extend downwardly on both sides of the width direction of the top plate;

[0045] a fourth side wall connected to one side of the top plate in the length direction, the fourth side wall being located at one side of the second card core in the length direction, and the fourth side wall being used to define the position of the T card; and

[0046] The fourth solder pin is connected to the bottom end of the third side wall. There are a plurality of the fourth solder pins, which are respectively located on both sides of the length direction of the third side wall, and the fourth solder pin is located below the first card core and the second card core. The top end of the fourth solder pin covers the bottom end of the first card core and the bottom end of the second card core, and the bottom end of the fourth solder pin is welded to the circuit board.

[0047] In the present invention, the top plate is provided with a first removal hole and a second removal hole corresponding to the second card slot, the first removal hole is located on one side of the length direction of the top plate, and the first removal hole is used to remove the T card.

[0048] The second removal hole is located at the other side of the top plate in the length direction, and the second removal hole is used to remove the second SIM card.

[0049] Compared with the prior art, the present invention has the following beneficial effects: the card tray type three-choice-two SIM card holder of the present invention divides the SIM card holder into multiple laminated parts that can be used independently or in combination through the combination of the first connecting seat, the card tray, and the second connecting seat. The user can choose to insert a SIM card or a T card according to actual needs, thus achieving the functional flexibility of three-choice-two. The first solder pad corresponding to the first connecting seat is arranged at the center of the circuit board, so that other electronic devices can be connected to the two ends of the circuit board along the length direction, thereby improving the space utilization rate of the circuit board and further improving the space utilization rate inside the device. At the same time, through the design of the card tray with sliding connection, the user can easily replace or adjust the card in the card slot, thereby improving the convenience of use.

[0050] On the basis of the card tray for inserting the SIM card, a second connecting socket for inserting the SIM card or T card is set. The stacked socket structure enables the entire SIM card socket to increase the function of the socket without increasing the plane space of the device. Users can freely combine different SIM cards and memory cards (one SIM card and one T card, or two SIM cards) as needed to meet a variety of usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0052] Figure 1 The figure is a schematic diagram of the overall structure of a card tray type three-choose-two SIM card socket according to a preferred embodiment of the present invention.

[0053] Figure 2 A top view of a circuit board according to a preferred embodiment of the present invention.

[0054] Figure 3 This is an exploded view of a tray-type three-choice-two SIM card socket according to a preferred embodiment of the present invention.

[0055] Figure 4 It is a top view of the connection structure between the first connection socket and the circuit board according to a preferred embodiment of the present invention.

[0056] Figure 5 This is a distribution diagram of the first connecting terminals of a preferred embodiment of the present invention.

[0057] Figure 6 It is a stereoscopic diagram of the card tray structure of a preferred embodiment of the present invention.

[0058] Figure 7 It is a bottom view of the connection structure between the card tray and the second connecting seat according to the preferred embodiment of the present invention.

[0059] Figure 8 It is a top view of the connection structure between the second connection socket and the circuit board according to a preferred embodiment of the present invention.

[0060] Fig. 9 FIG. 4 is a distribution diagram of the second connecting terminals and the third connecting terminals according to a preferred embodiment of the present invention.

[0061] Fig.10 It is a three-dimensional diagram of the connection structure between the second connection socket and the circuit board according to a preferred embodiment of the present invention.

[0062] Fig.11 It is a top view of the second card core of the preferred embodiment of the present invention.

[0063] Figure numerals: 1, circuit board; 11, first solder pad; 12, second solder pad; 13, third solder pad; 14, fourth solder pad; 15, first groove; 16, second groove; 17, insulating fixing point; 2, first connecting seat; 21, first card core; 211, first through hole; 212, side receiving groove; 213, connecting hole; 2131, upper left connecting hole; 2132, left middle connecting hole; 2133, lower left connecting hole; 2134, upper right connecting hole; 2135, right middle connecting hole; 2136, lower right connecting hole; 214, pressing plate; 22, first connecting terminal; 221, first fixing frame; 222, first spring sheet; 23, upper left connecting terminal; 231, upper left fixing frame; 232, upper left spring sheet; 233, first upper left Lead-out terminal; 234, second upper left lead-out terminal; 235, first upper left reinforcing sheet; 236, second upper left reinforcing sheet; 237, third upper left reinforcing sheet; 24, middle upper connecting terminal; 241, middle upper fixing frame; 242, middle upper spring sheet; 243, middle upper lead-out terminal; 244, first middle upper reinforcing sheet; 245, second middle upper reinforcing sheet; 246, third middle upper reinforcing sheet; 247, fourth middle upper reinforcing sheet; 25, upper right connecting terminal; 251, upper right fixing frame; 252, upper right spring sheet; 253, first upper right lead-out terminal; 254, second upper right lead-out terminal; 255, first upper right reinforcing sheet; 256, second upper right reinforcing sheet; 257, third upper right reinforcing sheet; 26, lower left connecting terminal; 261, lower left fixing frame; 26 2. Lower left spring piece; 263. First lower left lead terminal; 264. Second lower left lead terminal; 265. First lower left reinforcing sheet; 266. Second lower left reinforcing sheet; 267. Third lower left reinforcing sheet; 27. Middle lower connecting terminal; 271. Middle lower fixing frame; 272. Middle lower spring piece; 273. Middle lower lead terminal; 274. First middle lower reinforcing sheet; 275. Second middle lower reinforcing sheet; 276. Third middle lower reinforcing sheet; 277. Fourth middle lower reinforcing sheet; 28. Lower right connecting terminal; 281. Lower right fixing frame; 282. Lower right spring piece; 283. First lower right lead terminal; 284. Second lower right lead terminal; 285. First lower right reinforcing sheet; 286. Second lower right reinforcing sheet; 287. Third lower right reinforcing sheet; 3. Second connecting seat ; 31, second card core; 311, second bottom plate; 3111, second through hole; 3112, third through hole; 3113, avoidance groove; 312, second side wall; 3121, first positioning groove; 3122, third positioning protrusion; 3123, fourth positioning protrusion; 313, second card slot; 314, second positioning groove; 315, pin; 316, first limit block; 317, second limit block; 32, iron shell; 321, top plate; 3211, first demolition hole; 3212, second demolition hole; 322, third side wall; 3221, second positioning protrusion; 3222, third positioning hole; 323, fourth welding foot; 324, fourth side wall; 3241, fourth positioning hole; 33, second connecting terminal; 331, second spring piece;332, second extension end; 333, second lead end; 34, third connection terminal; 341, third spring piece; 342, third extension end; 343, third lead end; 4, card tray; 41, second fixing frame; 411, curved groove; 42, support plate; 43, pull block; 44, elastic member; 51, first SIM card; 52, T card; 53, second SIM card. ; DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0065] In the figures, structurally similar elements are denoted by the same reference numerals.

[0066] The terms "first", "second", etc. in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be used as a limitation on the order of precedence.

[0067] Please refer to Figure 1 , Figure 2 and Figure 3 ,in Figure 1 This is a schematic diagram of the overall structure of a card tray type three-choose-two SIM card holder according to a preferred embodiment of the present invention. Figure 2 A top view of a circuit board according to a preferred embodiment of the present invention is shown in FIG. Figure 3 This is an exploded view of a card tray type three-choice-two SIM card holder according to a preferred embodiment of the present invention. The X-axis direction marked in the figure is the length direction, the Y-axis direction is the width direction, and the Z-axis is the upward direction.

[0068] The following is a preferred embodiment of a card tray type three-choice-two SIM card holder provided by the present invention that can solve the above technical problems.

[0069] The preferred embodiment of the card tray type three-choice-two SIM card holder provided by the present invention is as follows: a card tray type three-choice-two SIM card holder comprises a circuit board 1, a first connection seat 2, a card tray 4 and a second connection seat 3; a first solder pad 11, a second solder pad 12 and a third solder pad 13 are arranged on the circuit board 1, and the first solder pad 11, the second solder pad 12 and the third solder pad 13 are mainly used to connect the pins of the electronic components with the conductive tracks on the circuit board 1. The first solder pad 11 is located in the middle of the top of the circuit board 1; the second solder pad 12 is arranged in two groups, and the two groups of second solder pads 12 are arranged on both sides of the width direction of the top of the circuit board 1; the third solder pad 13 is located on one side of the length direction of the top of the circuit board 1, and the third solder pad 13 is arranged in two groups, and the two groups of third solder pads 13 are arranged on both sides of the width direction of the top of the circuit board 1.

[0070] The first connecting seat 2 is arranged above the circuit board 1, and the first connecting seat 2 is provided with a first connecting terminal 22, one end of the first connecting terminal 22 is connected to the first SIM card 51, and the other end of the first connecting terminal 22 is connected to the first soldering pad 11; the second connecting seat 3 is arranged above the first connecting seat 2, and the second connecting seat 3 is connected to the circuit board 1, and a first card slot for inserting the first SIM card 51 is formed between the second connecting seat 3 and the first connecting seat 2; the second connecting seat 3 is provided with a second card slot 313 for inserting the second SIM card 53 or the T card 52, and the second connecting seat 3 is provided with a second connecting terminal 33 and a third connecting terminal 34, one end of the second connecting terminal 33 is connected to the T card 52, and the other end of the second connecting terminal 33 is connected to the second soldering pad 12; one end of the third connecting terminal 34 is connected to the second SIM card 53, and the other end of the third connecting terminal 34 is connected to the third soldering pad 13.

[0071] The card tray 4 is located between the first connecting seat 2 and the second connecting seat 3 , and the card tray 4 is slidably connected to the circuit board 1 along the length direction. The card tray 4 is used to carry the first SIM card 51 .

[0072] The design of the card tray type three-choice-two SIM card holder allows users to choose to insert any two of the first SIM card 51, the second SIM card 53 or the T card 52 according to their needs. This three-choice-two configuration enhances the flexibility and compatibility of the device. Both the dual SIM card usage scenario and the scenario where a T card 52 (such as a MicroSD card) is required to expand the storage space can be met, providing users with more choices and convenience. Through the split design, the circuit board 1, the first connecting seat 2, the card tray 4 and the second connecting seat 3 are stacked, so that the entire SIM card holder minimizes the space occupied while maintaining full functionality. This is particularly important for electronic devices that require highly integrated and compact design.

[0073] The split structure makes the connections between the various components relatively independent, which is convenient for individual replacement or repair. For example, if a SIM card slot is damaged, only the corresponding connector or card tray 4 can be replaced without replacing the entire SIM card holder, which reduces maintenance costs and difficulties. In addition, the first solder pad 11 is arranged at the center of the circuit board 1, so that other electronic devices can be connected at both ends of the circuit board 1 along the length direction, which improves the space utilization of the circuit board 1.

[0074] Combination Figure 2 , the structure of the circuit board 1 in this embodiment is described as follows:

[0075] There are a plurality of first pads 11, and the plurality of first pads 11 are located at the center of the top of the circuit board 1, and the plurality of first pads 11 are arranged in two rows, and the plurality of first pads 11 are distributed in a rectangular array. In this embodiment, there are 6 first pads 11. There are a plurality of second pads 12, and the plurality of second pads 12 are arranged in two groups, and the two groups of second pads 12 are arranged at both ends of the width direction of the circuit board 1; in this embodiment, there are 8 second pads 12.

[0076] Along the length direction of the circuit board 1, the third pad 13 is located on one side of the second pad 12, and there are a plurality of third pads 13, and the plurality of third pads 13 are arranged in two groups, and the two groups of third pads 13 are arranged at both ends along the width direction of the circuit board 1. In this embodiment, there are 6 third pads 13.

[0077] By arranging the first pad 11, the second pad 12 and the third pad 13 in a rectangular array or at both ends along the width direction of the circuit board 1, efficient arrangement of the pads on the circuit board 1 is achieved. This layout not only reduces the space waste between the pads, but also ensures that the electrical connection path between the pads is as short as possible, thereby improving the efficiency and stability of signal transmission. In addition, the first pad 11 is arranged at the center of the circuit board 1, so that other electronic devices can be connected at both ends of the circuit board 1 along the length direction, thereby improving the space utilization of the circuit board 1.

[0078] The structure of the first connecting socket 2 in this embodiment is described as follows:

[0079] Combination Figure 3 and Figure 4 In this embodiment, the first connection socket 2 includes a first card core 21 and a first connection terminal 22. The first card core 21 is located above the circuit board 1. The first connection terminal 22 is arranged on the first card core 21, and one end of the first connection terminal 22 extends into the first card slot. One end of the first connection terminal 22 is used to connect the first SIM card 51, and the other end of the first connection terminal 22 is connected to the first soldering pad 11. The first connection socket 2 realizes electrical connection between the first SIM card 51 and the first soldering pad 11 of the circuit board 1 through the design of the first card core 21 and the first connection terminal 22.

[0080] The structure of the first connecting terminal 22 in this embodiment is described as follows:

[0081] Combination Figure 4 and Figure 5The first connection terminal 22 includes a first fixed frame 221, a first spring piece 222 and a first lead-out end; wherein the first fixed frame 221 is connected to the first card core 21; the first spring piece 222 is arranged in the first fixed frame 221, and the first spring piece 222 is used to contact the first SIM card 51; one end of the first lead-out end is connected to the first fixed frame 221, and the other end of the first lead-out end is connected to the first solder pad 11 on the circuit board 1; wherein the first fixed frames 221 of several first connection terminals 22 are arranged in a rectangular array.

[0082] An insulating fixing point 17 is provided on the circuit board 1, and along the projection of the plane where the circuit board 1 is located, the insulating fixing point 17 is located in the first fixing frame 221. The length of the first spring piece 222 is greater than the length of the first fixing frame 221, one end of the first spring piece 222 is connected to the first fixing frame 221, and the other end of the first spring piece 222 is connected to the insulating fixing point 17 on the circuit board 1, so that the middle part of the first spring piece 222 is bent and extends into the first card slot.

[0083] The first connection terminal 22 is composed of a first fixing frame 221, a first elastic sheet 222 and a first lead-out terminal, and this structure enables the terminal to be firmly fixed on the first card core 21 and to form a reliable electrical contact with the first SIM card 51 through the first elastic sheet 222. At the same time, the first lead-out terminal is connected to the first solder pad 11 on the circuit board 1 to ensure data transmission.

[0084] The first fixing frames 221 of the first connecting terminals 22 in this embodiment are arranged in a rectangular array, which optimizes the spatial layout of the first card core 21, so that the first connecting seat 2 occupies less space while maintaining complete functions, which helps to achieve a miniaturized and compact design of the card seat.

[0085] The first spring piece 222 in this embodiment is a strip structure, the straight line where the long side direction of the first spring piece 222 is located is parallel to the straight line where the long side direction of the circuit board 1 is located, one end of the first spring piece 222 is connected to one end of the first fixing frame 221, and the other end of the first spring piece 222 extends toward the other side of the long side of the first fixing frame 221. The length of the first spring piece 222 is greater than the length of the first fixing frame 221. The first card core 21 is provided with a pressing plate 214, which is located above the insulating fixing point 17, and the pressing plate 214 is used to press and fix the other end of the first spring piece 222, so that the middle part of the first spring piece 222 is bent, ensuring the elasticity of the first spring piece 222, and at the same time improving the stability of the connection between the first spring piece 222 and the circuit board 1 and the first card core 21.

[0086] In this embodiment, at least two first lead-out terminals are provided, and at least two first lead-out terminals are welded to the circuit board 1 to avoid a cold soldering between the first connection terminal 22 and the circuit board 1. A set distance is provided between adjacent first lead-out terminals in a single first connection terminal 22. A set distance is also provided between the first lead-out terminals between adjacent first connection terminals 22. The set distance in this embodiment is a distance to ensure electrical safety, in order to avoid a short circuit between adjacent first connection terminals 22.

[0087] In this embodiment, a first groove 15 is further provided at the top of the circuit board 1 , and the first clamping core 21 corresponds to the position of the first elastic piece 222 . The first groove 15 increases the elastic deformation space of the first elastic piece 222 .

[0088] The structural layout of the first connection terminals 22 is described in detail as follows:

[0089] The first connection terminals 22 in this embodiment include two rows of upper left connection terminals 23 , upper middle connection terminals 24 , upper right connection terminals 25 , lower left connection terminals 26 , lower middle connection terminals 27 and lower right connection terminals 28 .

[0090] Among them, the middle upper connecting terminal 24 includes a middle upper fixing frame 241, a middle upper spring piece 242 and a middle upper lead-out end 243. The middle upper lead-out end 243 corresponds to the inner bottom end of the middle upper fixing frame 241, and there are two middle upper lead-out ends 243 of the middle upper connecting terminal 24, and the two middle upper lead-out ends 243 are relatively arranged on both sides of the middle upper spring piece 242.

[0091] The upper left connection terminal 23 includes an upper left fixing frame 231, an upper left spring 232, a first upper left lead-out terminal 233, and a second upper left lead-out terminal 234; the upper left fixing frame 231 is located on the left side of the upper middle fixing frame 241, and the upper left spring 232 is arranged in the upper left fixing frame 231, and the first upper left lead-out terminal 233 and the second upper left lead-out terminal 234 are diagonally distributed on the upper left fixing frame 231. In this embodiment, the first upper left lead-out terminal 233 is arranged at the inner bottom end of the upper left fixing frame 231, and is located on the side of the upper left spring 232 away from the upper middle connection terminal 24. The second upper left lead-out terminal 234 is arranged on the side of the upper left fixing frame 231 close to the upper middle connection terminal 24, and is located above the upper middle lead-out terminal 243 of the upper middle connection terminal 24 close to the upper left connection terminal 23.

[0092] The upper right connection terminal 25 includes an upper right fixing frame 251, an upper right spring 252, a first upper right lead-out terminal 253, and a second upper right lead-out terminal 254; the upper right fixing frame 251 is located on the right side of the upper middle fixing frame 241, and the upper right spring 252 is arranged in the upper right fixing frame 251, and the first upper right lead-out terminal 253 and the second upper right lead-out terminal 254 are diagonally distributed on the upper right fixing frame 251. In this embodiment, the first upper right lead-out terminal 253 is arranged at the inner bottom end of the upper right fixing frame 251, and is located on the side of the upper right spring 252 away from the upper middle connection terminal 24. The second upper right lead-out terminal 254 is arranged on the side of the upper right fixing frame 251 close to the upper middle connection terminal 24, and is located above the upper middle lead-out terminal 243 of the upper middle connection terminal 24 close to the upper right connection terminal 25.

[0093] The middle and lower connecting terminal 27 is located on one side of the middle and upper connecting terminal 24 along the length direction of the circuit board 1. The middle and lower connecting terminal 27 includes a middle and lower fixing frame 271, a middle and lower spring piece 272 and a middle and lower lead-out end 273. The middle and lower lead-out ends 273 of the middle and lower connecting terminal 27 are all connected to the corresponding inner bottom end of the middle and lower fixing frame 271, and there are two middle and lower lead-out ends 273 of the middle and lower connecting terminal 27, which are relatively arranged on both sides of the middle and lower spring piece 272.

[0094] The lower left connection terminal 26 includes a lower left fixing frame 261, a lower left spring 262, a first lower left lead-out terminal 263 and a second lower left lead-out terminal 264; the lower left fixing frame 261 is located on the left side of the middle and lower fixing frame 271, and the lower left spring 262 is arranged in the lower left fixing frame 261, and the first lower left lead-out terminal 263 and the second lower left lead-out terminal 264 are diagonally distributed on the lower left fixing frame 261, so as to maintain a large safety distance between the two lower left lead-out terminals; in this embodiment, the first lower left lead-out terminal 263 is arranged at the inner bottom end of the lower left fixing frame 261, and the first lower left lead-out terminal 263 is located on the side of the lower left spring 262 away from the middle and lower terminal. The second lower left lead-out terminal 264 is arranged above the lower left fixing frame 261 and close to the side of the middle and lower connection terminal 27.

[0095] The lower right connection terminal 28 includes a lower right fixing frame 281, a lower right spring piece 282, a first lower right lead-out terminal 283, and a second lower right lead-out terminal 284; the lower right fixing frame 281 is located on the right side of the lower middle fixing frame 271, and the lower right spring piece 282 is arranged in the lower right fixing frame 281, and the first lower right lead-out terminal 283 and the second lower right lead-out terminal 284 are diagonally distributed on the lower right fixing frame 281. In this embodiment, the first lower right lead-out terminal 283 is arranged at the inner bottom end of the lower right fixing frame 281, and is located on the side of the lower right spring piece 282 away from the lower middle terminal. The second lower right lead-out terminal 284 is arranged above the lower right fixing frame 281, and is located close to the side of the lower middle connection terminal 27.

[0096] In this embodiment, the first connection terminal 22 and the first card core 21 are integrally injection molded, and the width dimension of the first card core 21 is small, so the width dimensions of the first connection terminals 22 are also compactly arranged. Compared with the layout of the first lead-out ends of the first connection terminals 22 are all the same as the layout of the middle and lower connection terminals 27, the overall width of the first connection seat 2 is wider. On this basis, this embodiment further

[0097] The first lead-out ends of the four first connection terminals on the peripheral side are arranged in a staggered manner, which further reduces the arrangement space of the first connection terminals 22 on the basis of ensuring the safety distance between the multiple first lead-out ends, so that the overall structure of the first connection socket 2 is miniaturized.

[0098] Combination Figure 4 and Figure 5 The first connection terminal 22 of the present invention further includes a reinforcement sheet, and a plurality of reinforcement sheets are provided. The plurality of reinforcement sheets are arranged around the first fixing frame 221, and the reinforcement sheets are connected to the first card core 21. The reinforcement sheets increase the contact surface between the first connection terminal 22 and the first card core 21, and increase the stability of the structure of the first connection seat 2. The provision of the reinforcement sheet increases the contact surface between the first connection terminal 22 and the first card core 21, thereby enhancing the stability and reliability of the connection.

[0099] The first card core 21 is provided with a plurality of connection holes 213 , which are evenly distributed in a rectangular row on the first card core 21 . Along the projection of the plane where the first card core 21 is located, connection holes 213 are provided between adjacent first connection terminals 22 , and the connection holes 213 connect the reinforcement plates of adjacent first connection terminals 22 .

[0100] The multiple connection holes in this embodiment include an upper left connection hole 2131 , a left middle connection hole 2132 , a lower left connection hole 2133 , an upper right connection hole 2134 , a right middle connection hole 2135 , and a lower right connection hole 2136 .

[0101] The upper left connection hole 2131 is located between the first upper left connection terminal 23 and the upper middle connection terminal 24 , and is used to connect the reinforcement sheets of the first upper left connection terminal 23 and the upper middle connection terminal 24 .

[0102] The lower left connection hole 2133 is located between the first lower left connection terminal 26 and the lower middle connection terminal 27 , and is used to connect the reinforcing sheets of the lower left connection terminal 26 and the lower middle connection terminal 27 .

[0103] The left middle connection hole 2132 is located between the upper left connection hole 2131 and the lower left connection hole 2133 , and is used to connect the reinforcing sheets of the first upper left connection terminal 23 , the upper middle connection terminal 24 , the lower left connection terminal 26 and the lower middle connection terminal 27 .

[0104] The upper right connection hole 2134 is located between the first upper right connection terminal 25 and the upper middle connection terminal 24 , and is used to connect the reinforcement sheets of the first upper right connection terminal 25 and the upper middle connection terminal 24 .

[0105] The lower right connection hole 2136 is located between the first lower right connection terminal 28 and the lower middle connection terminal 27 , and is used to connect the reinforcing sheets of the lower right connection terminal 28 and the lower middle connection terminal 27 .

[0106] The right middle connection hole 2135 is located between the right upper connection hole 2134 and the right lower connection hole 2136 , and is used to connect the reinforcing sheets of the first right upper connection terminal 25 , the middle upper connection terminal 24 , the right lower connection terminal 28 and the middle lower connection terminal 27 .

[0107] like Figure 4 and Figure 5 As shown, in this embodiment, there are several reinforcing sheets, wherein the upper left connection terminal 23 includes a first upper left reinforcing sheet 235, a second upper left reinforcing sheet 236 and a third upper left reinforcing sheet 237. The first upper left reinforcing sheet 235 is arranged on the side of the upper left fixing frame 231 away from the middle upper connection terminal 24, and the first upper left reinforcing sheet 235 is connected to one side of the width direction of the first card core, and the second upper left reinforcing sheet 236 is arranged on the side of the upper left fixing frame 231 close to the middle upper connection terminal 24, and the second upper left reinforcing sheet 236 is located between the second upper left lead-out end 234 and the middle upper lead-out end 243 arranged close to the upper left connection terminal 23, and the second upper left reinforcing sheet 236 is connected to one side of the upper left connection hole 2131. The third upper left reinforcing sheet 237 is arranged at the lower right of the upper left fixing frame 231, and the third upper left reinforcing sheet 237 is connected to the left middle connection hole 2132.

[0108] The middle upper connection terminal 24 further includes a first middle upper reinforcement sheet 244, a second middle upper reinforcement sheet 245, a third middle upper reinforcement sheet 246 and a fourth middle upper reinforcement sheet 247. The first middle upper reinforcement sheet 244 is arranged on one side of the middle upper fixing frame 241, and is connected to the other side of the left upper connection hole 2131. The second middle upper reinforcement sheet 245 is arranged on the other side of the middle upper fixing frame 241, and is connected to one side of the right upper connection hole 2134. The third middle upper reinforcement sheet 246 and the fourth middle upper reinforcement sheet 247 are arranged on both sides of the bottom end of the middle upper fixing frame 241, and the third middle upper reinforcement sheet 246 is located on the side of the fourth middle upper reinforcement sheet 247 close to the left upper connection terminal 23. The third middle upper reinforcement sheet 246 is connected to the left middle connection hole 2132, and the fourth middle upper reinforcement sheet 247 is connected to the right middle connection hole 2135.

[0109] The upper right connection terminal 25 includes a first upper right reinforcing piece 255, a second upper right reinforcing piece 256 and a third upper right reinforcing piece 257. The first upper right reinforcing piece 255 is arranged on the side of the upper right fixing frame 251 away from the middle upper connection terminal 24, and the first upper right reinforcing piece 255 is connected to the other side of the width direction of the first card core. The second upper right reinforcing piece 256 is arranged on the side of the upper right fixing frame 251 close to the middle upper connection terminal 24, and the second upper right reinforcing piece 256 is located between the second upper right lead-out end 254 and the middle upper lead-out end 243 arranged close to the upper right connection terminal 25, and the second upper right reinforcing piece 256 is connected to one side of the upper right connection hole 2134. The third upper right reinforcing piece 257 is arranged at the lower left of the upper right fixing frame 251, and the third upper right reinforcing piece 257 is connected to the right middle connection hole 2135.

[0110] The lower left connection terminal 26 includes a first lower left reinforcing piece 265, a second lower left reinforcing piece 266 and a third lower left reinforcing piece 267. The first lower left reinforcing piece 265 is arranged on the side of the lower left fixing frame 261 away from the middle and lower connection terminal 27, and is connected to one side of the first card core 21 in the width direction. The second lower left reinforcing piece 266 is arranged on the side of the lower left fixing frame 261 close to the middle and lower connection terminal 27, and the second lower left reinforcing piece 266 is located between the second lower left lead-out end 264 and the middle and lower lead-out end 273 arranged close to the lower left connection terminal 26, and the second lower left reinforcing piece 266 is connected to one side of the lower left connection hole 2133. The third lower left reinforcing piece 267 is arranged on the upper right of the lower left fixing frame 261, and is connected to the left middle connection hole 2132.

[0111] The middle and lower connection terminal 27 further includes a first middle and lower reinforcement sheet 274, a second middle and lower reinforcement sheet 275, a third middle and lower reinforcement sheet 276 and a fourth middle and lower reinforcement sheet 277. The first middle and lower reinforcement sheet 274 is arranged on one side of the middle and lower fixing frame 271, and is connected to the other side of the left lower connection hole 2133. The second middle and lower reinforcement sheet 275 is arranged on the other side of the middle and lower fixing frame 271, and is connected to one side of the right lower connection hole 2136. The third middle and lower reinforcement sheet 276 and the fourth middle and lower reinforcement sheet 277 are arranged on both sides of the top of the middle and lower fixing frame 271, and the third middle and lower reinforcement sheet 276 is located on the side of the fourth middle and lower reinforcement sheet 277 close to the left lower connection terminal 26. The third middle and lower reinforcement sheet 276 is connected to the left middle connection hole 2132, and the fourth middle and lower reinforcement sheet 277 is connected to the right middle connection hole 2135.

[0112] The lower right connection terminal 28 includes a first lower right reinforcing piece 285, a second lower right reinforcing piece 286 and a third lower right reinforcing piece 287. The first lower right reinforcing piece 285 is arranged on the side of the lower right fixing frame 281 away from the lower middle connection terminal 27, and the first lower right reinforcing piece 285 is connected to the other side in the width direction of the first card core 21. The second lower right reinforcing piece 286 is arranged on the side of the lower right fixing frame 281 close to the lower middle connection terminal 27, and the second lower right reinforcing piece 286 is located between the second lower right lead-out end 284 and the lower middle lead-out end 273 arranged close to the lower right connection terminal 28, and the second lower right reinforcing piece 286 is connected to one side of the lower right connection hole 2136. The third lower right reinforcing piece 287 is arranged on the upper left of the lower right fixing frame 281, and the third lower right reinforcing piece 287 is connected to the right middle connection hole 2135.

[0113] A plurality of side receiving grooves 212 are also provided on both sides of the width direction of the first card core 21. The side receiving grooves 212 correspond to the positions of the reinforcing pieces on the sides of the first connection terminal 22. In this embodiment, the first card core 21 is provided with side receiving grooves 212 corresponding to the positions of the first upper left reinforcing piece 2353, the first upper right reinforcing piece 255, the first lower left reinforcing piece 265, and the second lower middle reinforcing piece 275. The side receiving grooves 212 are welded and fixed to the reinforcing pieces, which further enhances the connection strength between the first connection terminal 22 and the first card core 21 and improves the stability of the overall structure. The reinforcing piece and the first card core 21 are welded and fixed through the side receiving grooves 212, which further enhances the connection strength between the first connection terminal 22 and the first card core 21. The welding and fixing of the first card core 21 and the reinforcing piece also provides additional mechanical support, which improves the stability of the overall structure of the first connection seat 2.

[0114] The set distance (i.e., safety distance) between the multiple first connection terminals 22 in this embodiment prevents short circuits from occurring between the multiple first connection terminals 22. A reinforcing sheet is provided to connect with the first card core 21, thereby improving the stability of the connection between the first connection terminal 22 and the first card core 21 and improving the overall strength of the first connection seat 2 structure.

[0115] The structure of the first card core 21 in this embodiment is described as follows:

[0116] Combination Figure 4 The first card core 21 is a rectangular plate structure. The first card core 21 is provided with two rows of first through holes 211 located directly below the first card slot. The first through holes 211 are rectangular structures. Each first through hole 211 passes through the first card core 21 from top to bottom. The first elastic piece 222 of a single first connecting terminal 22 is correspondingly arranged in a single first through hole 211. Each first through hole 211 corresponds to a first elastic piece 222 of a first connecting terminal 22. This design enables each elastic piece to independently contact the first SIM card 51, thereby improving the accuracy and stability of signal transmission.

[0117] Furthermore, in the present embodiment, a second welding hole is provided at the position of the first lead-out end of the first card core 21, and the second welding hole passes through the first card core 21, so as to facilitate welding of the first lead-out end with the first soldering pad 11 on the circuit board 1, thereby simplifying the welding process, improving production efficiency, and reducing the error rate during welding.

[0118] The rectangular plate structure of the first card core 21 is compactly designed and matches the middle space on the circuit board 1 to maximize the use of space. This design helps to reduce the volume of the card holder, making it more suitable for electronic devices with limited space.

[0119] The structure of the tray 4 in this embodiment is described as follows:

[0120] Combination Figure 6 and Figure 7 , the card tray 4 includes a second fixed frame 41, a support plate 42, a pull block 43, and an elastic member 44; the first fixed frame 221 is slidably connected to the circuit board 1 on both sides in the width direction; the support plate 42 is arranged in the first fixed frame 221, the support plate 42 supports the first SIM card 51, and the pull block 43 is arranged at one end of the long side direction of the second fixed frame 41, and the pull block 43 is used to pull the card tray 4, so that the card tray 4 drives the first SIM card 51 to be pulled out. There are two groups of elastic members 44, and the two groups of elastic members 44 are relatively arranged on both sides of the width direction of the card tray 4. The elastic members 44 elastically squeeze the side of the second connecting seat 3, thereby limiting the position of the card tray 4. Through the design of the pull block 43, the card tray 4 allows the user to easily pull the card tray 4, thereby driving the first SIM card 51 in and out of the card seat. This design not only improves the convenience of user operation, but also reduces the risk of damage to the first SIM card 51 caused by improper operation.

[0121] The support plate 42 is disposed in the first fixing frame 221 to support the first SIM card 51 , thereby ensuring the stability of the first SIM card 51 in the first card slot and avoiding poor contact or damage caused by shaking or vibration.

[0122] In this embodiment, a first positioning groove 3121 is provided on the second connecting seat 3. When the elastic member 44 is engaged with the first positioning groove 3121, the first SIM card 51 is connected to the first connecting terminal 22, and the card tray 4 is received at the bottom end of the second connecting seat 3, thereby limiting the position of the card tray 4 and preventing the card tray 4 from loosening and falling off.

[0123] The engagement design of the elastic member 44 and the first positioning groove 3121 realizes the automatic positioning of the card tray 4 during the insertion process. When the card tray 4 is fully inserted, the elastic member 44 and the first positioning groove 3121 are tightly matched to firmly fix the card tray 4 on the second connecting seat 3, thereby preventing the card tray 4 from loosening or falling off. This design not only improves the reliability of the SIM card holder, but also reduces the problem of poor contact of the first SIM card 51 caused by the looseness of the card tray 4.

[0124] In this embodiment, a curved groove 411 is provided at one end of the second fixing frame 41 away from the pull block 43 . The curved groove 411 facilitates identification of the installation direction of the card tray 4 and facilitates the user to disassemble and assemble the card tray 4 .

[0125] In this embodiment, a second groove 16 is further provided at the top of the circuit board 1. The second groove 16 is a long strip structure and extends along the length direction of the circuit board 1. The bottom end of the card tray 4 is slidably connected to the second groove 16 to facilitate the guided disassembly and assembly operation of the card tray 4.

[0126] When the card tray 4 is received at the bottom of the second connection seat 3, it not only limits the position of the card tray 4, but also makes full use of the card seat space, making the entire first SIM card seat 51 more compact. This design helps to reduce the volume of electronic equipment and improve space utilization.

[0127] The structure of the second connecting socket 3 in this embodiment is described in detail as follows:

[0128] Combined with 1. Figure 3 and Figure 8 The second connection seat 3 in this embodiment includes a second card core 31, an iron shell 32, a second connection terminal 33 and a third connection terminal 34; the second card core 31 is arranged above the first connection seat 2, and the second card core 31 is slidably connected to the card tray 4, and the second card core 31 covers the outer side of the card tray 4. The iron shell 32 is arranged on the outer side of the second card core 31, and the iron shell 32 covers the second card core 31. A second card slot 313 is arranged at the top of the second card core 31, and the second card slot 313 is used for inserting the second SIM card 53 or the T card 52, providing a flexible slot function for the second SIM card 53 and the T card 52, and increasing the versatility and user convenience of the card seat. The iron shell 32 covers the second card core 31, thereby enhancing the structural strength of the second connection seat 3 and protecting the internal components from external physical damage.

[0129] There are a plurality of second connection terminals 33, and two groups of the plurality of second connection terminals 33 are provided. The two groups of second connection terminals 33 are relatively arranged on both sides along the width direction of the second card core 31. One end of the second connection terminal 33 is located at one end of the length direction of the second card core 31, and one end of the second connection terminal 33 extends into the second card slot 313. One end of the second connection terminal 33 is used to connect the T card 52; the other end of the second connection terminal 33 extends along the width direction of the second card core 31, and the other end of the second connection terminal 33 is connected to the second soldering pad 12. The two groups of second connection terminals 33 are relatively arranged on both sides of the width direction of the second card core 31, which optimizes the spatial layout of the second connection seat 3.

[0130] There are a plurality of third connection terminals 34, which are located on the other side of the second connection terminal 33 along the length direction of the second card core 31; there are a plurality of third connection terminals 34, which are provided in two groups, and the two groups of third connection terminals 34 are relatively arranged on both sides along the width direction of the second card core 31. The third connection terminal 34 is arranged on the second card core 31, and one end of the third connection terminal 34 extends into the second card slot 313, one end of the third connection terminal 34 is used to connect the second SIM card 53, and the other end of the third connection terminal 34 extends in the width direction of the second card core 31, and the other end of the third connection terminal 34 is connected to the third soldering pad 13. The layout of the third connection terminal 34 optimizes the spatial layout of the connection between the card holder and the circuit board 1, improves the integration of the third connection terminal 34, and facilitates the welding of the second connection holder 3.

[0131] The structure of the second connecting terminal 33 in this embodiment is described in detail as follows:

[0132] Combination Fig. 9In this embodiment, the second connection terminal 33 includes a second elastic piece 331, a second extension end 332 and a second lead-out end 333. The second elastic piece 331 is arranged at one end of the second connection terminal 33. One end of the second elastic piece 331 extends into the second card slot 313 along one side of the length direction of the second card core 31. The second elastic piece 331 is used to connect the T card 52. The second elastic pieces 331 of the plurality of second connection terminals 33 in each group are arranged at intervals along the width direction of the second card core 31. The second lead-out end 333 is located at the other end of the second connection terminal 33. The second lead-out end 333 is connected to the second solder pad 12. The second lead-out ends 333 of the plurality of second connection terminals 33 in each group are arranged at intervals along the length direction of the second card core 31. The second extension end 332 is arranged in the middle of the second connection terminal 33. The second extension end 332 connects the second elastic piece 331 and the second lead-out end 333. The second spring piece 331 establishes elastic contact with the T card 52 to ensure the reliability of signal transmission; the second lead-out terminal 333 is connected to the second solder pad 12 to realize the transmission of the signal to the circuit board 1, and the setting of several second connection terminals 33 at intervals improves the convenience of welding and the stability of signal transmission.

[0133] The structure of the third connecting terminal 34 in this embodiment is described in detail as follows:

[0134] Combination Fig. 9 The third connection terminal 34 in this embodiment includes a third spring piece 341, a third extension end 342 and a third lead-out end 343; the third spring piece 341 is arranged at one end of the third connection terminal 34, and one end of the third spring piece 341 extends into the second card slot 313, and the third spring piece 341 is used to connect the second SIM card 53; the third spring pieces 341 of a plurality of third connection terminals 34 are distributed in a rectangular array. The third lead-out end 343 is arranged at the other end of the third connection terminal 34, and the third lead-out end 343 is connected to the third solder pad 13. The plurality of third connection terminals 34 include two groups arranged on both sides of the length direction of the second card core 31, and the third lead-out ends 343 of the plurality of third connection terminals 34 in each group are arranged at intervals along the length direction of the second card core 31. The third extension end 342 is located in the middle of the third connection terminal 34, and the third extension end 342 is arranged in the second card core 31, and the third extension end 342 connects the third spring piece 341 and the third lead-out end 343. The third connection terminal 34 supports the insertion and connection of the second SIM card 53, thereby increasing the versatility of the card socket.

[0135] The third spring piece 341 in this embodiment is a triangular structure, and the third spring piece 341 is provided with a vertex for contacting the second SIM card 53, and the long side of the third spring piece 341 opposite to the vertex is connected to the third extension end 342. The third spring piece 341 of the triangular structure provides good elastic contact, ensuring the stability of the connection of the second SIM card 53; the third lead-out end 343 is connected to the third pad 13, realizing the transmission of the second SIM card 53 signal to the circuit board 1.

[0136] The third extension end 342 in this embodiment can be a straight line structure, a folded line structure or a rectangular structure according to the setting space of the second card core 31. Flexible design according to space requirements ensures a stable connection between the third spring 341 and the third lead-out end 343, while improving the flexibility and practicality of the design.

[0137] The structure of the second card core 31 in this embodiment is described as follows:

[0138] Combination Fig.10 and Fig.11 The second card core 31 is a rectangular plate-shaped structure, and the second card core 31 includes a second bottom plate 311 and a second side wall 312. Two groups of second side walls 312 are provided, and the two groups of second side walls 312 are relatively vertically arranged on both sides of the width direction of the second bottom plate 311, and the second side walls 312 define the position of the second SIM card 53 or the T card 52. The second bottom plate 311 and the two groups of second side walls 312 together form a second card slot 313 for accommodating the second SIM card 53 and the T card 52. The second bottom plate 311 is located above the card tray 4, and the card tray 4 elastically squeezes the second side wall 312 through the elastic member 44, thereby defining the position of the card tray 4.

[0139] The second bottom plate 311 is provided with a second through hole 3111 and two rows of third through holes 3112 at a position directly below the second slot 313. The second through hole 3111 is located at one end of the second bottom plate 311 in the length direction, and is a rectangular structure. The second through hole 3111 passes through the second bottom plate 311 from top to bottom, and the second spring pieces 331 of the second connection terminals 33 in each group are all located in the second through hole 3111.

[0140] The two rows of third through holes 3112 are located at the other end of the second bottom plate 311 in the length direction, and the cross-sectional shape of the third through holes 3112 is substantially the same as the cross-sectional shape of the third elastic pieces 341. Each third through hole 3112 passes through the second bottom plate 311 from top to bottom, and the third elastic piece 341 of a single third connection terminal 34 is correspondingly arranged in a single third through hole 3112. The second through hole 3111 and the third through hole 3112 provide precise positioning for the installation of the second connection terminal 33 and the third connection terminal 34, ensuring the stability of the connection and the accuracy of the signal.

[0141] In this embodiment, the second card core 31 further includes a plurality of pins 315, the plurality of pins 315 include a first pin 315 and a plurality of second pins 315, the plurality of first pins 315 correspond one-to-one with the second lead-out ends 333 of the plurality of second connection terminals 33, and the plurality of second pins 315 correspond one-to-one with the third lead-out ends 343 of the plurality of third connection terminals 34. The one-to-one correspondence between the pins 315 and the lead-out ends ensures that the electrical connection between the second SIM card 53 and the T card 52 and the circuit board 1 is more stable.

[0142] In this embodiment, first positioning grooves 3121 are formed on both sides of the first card core 21 in the width direction, and the elastic member 44 is engaged with the first positioning grooves 3121 to improve the connection accuracy and stability between the card tray 4 and the second card core 31 .

[0143] In this embodiment, the second card core 31 is provided with an avoidance groove 3113, which is located at the other side of the second card core 31 in the length direction. The avoidance groove 3113 corresponds to the position of the card tray 4, which is convenient for extracting the card tray 4 and improves the convenience of users taking out the card.

[0144] Furthermore, in this embodiment, the second card core 31 also includes a first limit block 316 , which is located in the second card slot 313 and connected to the second side wall 312 . The first limit block 316 is used to limit the position of the second SIM card 53 in the second card slot 313 .

[0145] The second card core 31 in this embodiment also includes a second limit block 317, which is arranged on one side of the long side of the second bottom plate 311 and extends downward. The second limit block 317 is used to limit the position of the card tray 4 in the second connecting seat 3.

[0146] The structure of the iron shell 32 in this embodiment is described as follows:

[0147] Combination Figure 1 and Figure 3The iron shell 32 in this embodiment is covered on the second card core 31, which enhances the structural strength of the card seat and protects the internal components from external interference. The iron shell 32 includes a top plate 321, a third side wall 322, a fourth welding leg 323 and a fourth side wall 324. The top plate 321 is located above the second card core 31. The third side wall 322 is provided with two groups. The two groups of third side walls 322 extend downward relative to both sides of the width direction of the top plate 321. The fourth welding leg 323 is connected to the bottom end of the third side wall 322. There are a plurality of fourth welding legs 323, which are respectively located on both sides of the length direction of the third side wall 322, and the fourth welding leg 323 is located below the first card core 21 and the second card core 31. The top end of the fourth welding leg 323 covers the bottom end of the first card core 21 and the bottom end of the second card core 31. The bottom end of the fourth welding leg 323 is welded to the fourth pad 14 on the circuit board 1, thereby covering the first card core 21 and the second card core 31 inside, forming a stable external structure. The fourth side wall 324 is disposed at one side in the width direction of the second card core 31 . The fourth side wall 324 is used to limit the position of the T-clip 52 to prevent the T-clip 52 from moving or falling off.

[0148] The second core 31 is provided with second positioning grooves 314 on both sides in the width direction, and the iron shell 32 is provided with second positioning protrusions 3221 on both sides in the width direction, and the second positioning protrusions 3221 are engaged with the second positioning grooves 314. In this embodiment, the second positioning protrusions 3221 are located on the third side wall 322.

[0149] In this embodiment, the second card core 31 is provided with third positioning protrusions 3122 on both sides along the width direction, and the third side wall 322 is provided with third positioning holes 3222. The third positioning protrusions 3122 and the third positioning holes 3222 are engaged with each other, thereby improving the connection accuracy and stability between the iron shell 32 and the second card core 31.

[0150] In this embodiment, a fourth positioning protrusion 3123 is provided at one end of the second card core 31 in the length direction, and a fourth positioning hole 3241 is provided on the fourth side wall 324. The fourth positioning protrusion 3123 is engaged with the fourth positioning hole 3241, thereby improving the connection accuracy and stability between the iron shell 32 and the second card core 31.

[0151] Furthermore, the iron shell 32 is provided with a first disassembly hole 3211, the first disassembly hole 3211 is located on one side of the length direction of the iron shell 32, the first disassembly hole 3211 is located on one side of the length direction of the top plate 321, the first disassembly hole 3211 corresponds to the second card slot 313, and the first disassembly hole 3211 is used to remove the T card 52 in the second card slot 313. The iron shell 32 is provided with a second disassembly hole 3212, the second disassembly hole 3212 corresponds to the second card slot 313, the second disassembly hole 3212 is located on the other side of the length direction of the top plate 321, and the second disassembly hole 3212 is used to remove the second SIM card 53 in the second card slot 313. The iron shell 32 is provided with two disassembly holes, which is convenient for the user to remove the SIM card or T card 52 without removing the entire card holder, thereby improving the convenience of use.

[0152] Working principle of the present invention:

[0153] 1. Fix the tray-type three-choice-two SIM card holder (including the first card core 21, the tray 4, the second card core 31, the iron shell 32, the connecting terminals and other components) of this preferred embodiment on the circuit board 1 by welding or other means. Ensure that each connecting terminal is firmly connected to the corresponding pad on the circuit board 1.

[0154] 2. The user inserts the first SIM card 51 into the card tray 4 as needed. When the card tray 4 is inserted into the bottom end of the second connection seat 3, the card tray 4 interacts with the side of the second connection seat 3 through the elastic member 44 to achieve a stable positioning of the card tray 4. The first SIM card 51 triggers the first spring sheet 222 of the first connection terminal 22, so that it establishes elastic contact with the contact on the first SIM card 51.

[0155] Insert the second SIM card 53 or T card 52 into the second card slot 313 formed between the second card core 31 and the iron shell 32. The design of the second card slot 313 ensures the secure insertion of the card and prevents the card from slipping or misalignment. When the second SIM card 53 or T card 52 is inserted, the T card 52 or the second SIM card 53 triggers the spring portion of the connection terminal (such as the second connection terminal 33 or the third connection terminal 34) to establish elastic contact with the contact on the card.

[0156] 3. When the first SIM card 51, T card 52 or second SIM card 53 is inserted and firmly connected, the springs of the connection terminals (including the first connection terminals 22, the second connection terminals 33 and the third connection terminals 34) are in close contact with the corresponding card contacts to form a conductive path.

[0157] The first connection terminal 22 transmits the signal of the first SIM card 51 to the first pad 11, and then transmits it to the core components such as the processing chip through the circuit board 1. The second connection terminal 33 transmits the signal of the T card 52 to the second pad 12, and then transmits it to the core components such as the processing chip through the circuit board 1. The third connection terminal 34 transmits the signal of the second SIM card 53 to the third pad 13, and is also processed through the circuit board 1.

[0158] 4. Card removal.

[0159] When the card needs to be removed, the user can remove the card from the card slot through external operations (pulling out the card tray 4, through the first removal hole 3211, the second removal hole 3212).

[0160] During the card removal process, the spring of the connection terminal will automatically reset and wait for the next card insertion.

[0161] This completes the use process of the card tray type three-choice-two SIM card holder of the preferred embodiment.

[0162] The card tray type three-choice-two SIM card holder of this embodiment realizes the insertion, connection and signal transmission of the SIM card and the T card 52 based on the elastic contact principle. Through the ingenious design between the second card core 31 and the iron shell 32, a second card slot 313 that can simultaneously support the SIM card and the T card 52 is formed. This multi-card slot design allows users to flexibly choose to insert different types of cards according to their needs, thereby improving the compatibility and practicality of the device.

[0163] The first connection terminal 22, the second connection terminal 33 and the third connection terminal 34 (especially the spring portion of the connection terminal) are made of elastic material, which can automatically adapt to the shape and position of the card when the card is inserted, and establish a stable conductive connection with the card contact. This elastic contact not only ensures reliable signal transmission, but also provides sufficient protection during the card insertion and removal process to prevent the contact from being worn or damaged.

[0164] The first card core 21 is located above the circuit board 1, connected to the first SIM card 51 through the first connection terminal 22, and electrically connected to the circuit board 1 through the first solder pad 11. The first through hole 211 on the first card core 21 provides a positioning space for the first elastic piece 222 of the first connection terminal 22.

[0165] The second card core 31 is arranged above the card tray 4 and is covered by the iron shell 32 to enhance the structural strength. The second card core 31 is provided with a second card slot 313 for inserting the second SIM card 53 or the T card 52. The second through hole 3111 and the third through hole 3112 on the second card core 31 provide positioning spaces for the second elastic piece 331 and the third elastic piece 341 of the second connecting terminal 33 and the third connecting terminal 34, respectively.

[0166] The card tray 4 is slidably connected to the circuit board 1 through the second fixing frame 41, and a support plate 42 is provided inside to support the first SIM card 51. The elastic member 44 on the card tray 4 interacts with the side of the second connecting seat 3 to achieve the positioning of the card tray 4.

[0167] The second connection terminal 33 and the third connection terminal 34 are used to connect the T card 52 and the second SIM card 53 respectively. The second spring piece 331 of the second connection terminal 33 extends into the second card slot 313 to contact the T card 52, and the other end of the second connection terminal 33 is connected to the second soldering pad 12 to achieve signal transmission. The third spring piece 341 of the third connection terminal 34 contacts the second SIM card 53. The other end of the third connection terminal 34 is connected to the third soldering pad 13 to achieve signal transmission.

[0168] The iron shell 32 covers the second card core 31, and precisely fits with the second card core 31 through a plurality of positioning protrusions and positioning grooves, thereby enhancing the stability of the overall structure. At the same time, the removal hole design on the iron shell 32 facilitates the user to remove the second SIM card 53 or T card 52 without removing the entire card holder.

[0169] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A card tray type three-choose-two SIM card holder, characterized in that: include: A circuit board, wherein the circuit board is provided with: A first solder pad, located in the middle of the top end of the circuit board; The second solder pads are provided in two groups, and the two groups of the second solder pads are relatively arranged at two sides of the top of the circuit board; and A third solder pad is located at one side of the circuit board in the length direction, and the third solder pad is provided in two groups, and the two groups of the third solder pads are relatively arranged at two sides of the top of the circuit board; A first connection socket, arranged above the circuit board, the first connection socket being provided with a first connection terminal, one end of the first connection terminal being connected to the first SIM card, and the other end of the first connection terminal being connected to the first soldering pad; A second connection base is arranged above the first connection base, and the second connection base is connected to the circuit board, a first card slot for inserting the first SIM card is formed between the second connection base and the first connection base; the second connection base is provided with a second card slot for inserting a second SIM card or a T card, and a second connection terminal and a third connection terminal are arranged on the second connection base, one end of the second connection terminal is connected to the T card, and the other end of the second connection terminal is connected to the second soldering pad; one end of the third connection terminal is connected to the second SIM card, and the other end of the third connection terminal is connected to the third soldering pad; as well as The card tray is located between the first connection seat and the second connection seat, and the card tray is slidably connected to the circuit board along the length direction, and the card tray is used to carry the first SIM card.

2. The card tray type three-choose-two SIM card holder according to claim 1, characterized in that: There are a plurality of the first pads, the plurality of the first pads are located at the center of the top end of the circuit board, and the plurality of the first pads are arranged in two rows, and the plurality of the first pads are distributed in a rectangular array; There are a plurality of second soldering pads, and the plurality of second soldering pads are arranged in two groups, and the two groups of second soldering pads are respectively arranged at two ends along the width direction of the circuit board; Along the length direction of the circuit board, the third pad is located on one side of the second pad. There are a plurality of third pads, and the plurality of third pads are arranged in two groups. The two groups of third pads are arranged at both ends along the width direction of the circuit board respectively.

3. The card tray type three-choose-two SIM card holder according to claim 2, characterized in that: The first connection base comprises: A first card core is arranged above the circuit board; and The first connection terminal is arranged on the first card core, and one end of the first connection terminal extends into the first card slot, one end of the first connection terminal is used to connect to the first SIM card, and the other end of the first connection terminal is connected to the first welding pad; Among them, a plurality of the first connecting terminals are arranged in a rectangular array.

4. The card tray type three-choose-two SIM card holder according to claim 3, characterized in that: The first connecting terminal comprises: A first fixing frame connected to the first card core; A first elastic sheet is disposed in the first fixing frame and extends upward, and is used to contact the first SIM card; and A first lead-out terminal, one end of which is connected to the first fixing frame, and the other end of which is connected to the first soldering pad on the circuit board; Wherein, a set distance is arranged between the first lead-out ends of adjacent first connection terminals.

5. The card tray type three-choose-two SIM card holder according to claim 9, characterized in that: An insulating fixing point is provided on the circuit board, and along the projection of the plane where the circuit board is located, the insulating fixing point is located in the first fixing frame; The length of the first spring sheet is greater than that of the first fixing frame. One end of the first spring sheet is connected to the first fixing frame, and the other end of the first spring sheet is connected to the insulating fixing point, so that the middle part of the first spring sheet is bent and extends into the first slot.

6. The card tray type three-choose-two SIM card holder according to claim 4, characterized in that: The first connecting terminal further comprises a reinforcing sheet, which is arranged on the peripheral side of the first fixing frame; the reinforcing sheet is connected to the first card core.

7. The card tray type three-choose-two SIM card holder according to claim 2, characterized in that: The second connection base comprises: A second card core is arranged above the card tray, a second card slot is arranged at the top of the second card core, and the second card slot is used for inserting a SIM card or a T card; An iron shell, covering the second card core, with two sides of the iron shell extending downward and welded to the circuit board; A second connecting terminal connected to the second card core, one end of the second connecting terminal extending into the second card slot for connecting to the T card, and the other end extending along the width direction of the second card core and connected to the second soldering pad; a plurality of second connecting terminals are provided, and the plurality of second connecting terminals are divided into two groups and are relatively arranged on both sides of the width direction of the second card core; and The third connecting terminal is connected to the second card core, and the third connecting terminal is located on the other side of the second connecting terminal along the length direction of the second card core. One end of the third connecting terminal extends into the second card slot, and one end of the third connecting terminal is used to connect the second SIM card. The other end of the third connecting terminal extends in the width direction of the second card core, and the other end of the third connecting terminal is connected to the third soldering pad.

8. The card tray type three-choose-two SIM card holder according to claim 7, characterized in that: The second connecting terminal comprises: A second spring sheet is arranged at one end of the second connecting terminal, one end of the second spring sheet extends into the second card slot along one side of the length direction of the second card core, the second spring sheet is used to connect the T card, and the second spring sheets of several second connecting terminals in each group are arranged at intervals along the width direction of the second card core; A second lead-out end, located at the other end of the second connecting terminal, the second lead-out end is connected to the second solder pad, and the second lead-out ends of the plurality of second connecting terminals in each group are arranged at intervals along the length direction of the second card core; and The second extension end is arranged in the middle of the second connecting terminal, and the second extension end connects the second spring piece and the second lead-out end.

9. The card tray type three-choose-two SIM card holder according to claim 7, characterized in that: The third connecting terminal comprises: A third elastic sheet, arranged at one end of the third connecting terminal, one end of the third elastic sheet extends into the second card slot, the third elastic sheet is used to connect the second SIM card, and the third elastic sheets of the third connecting terminals are distributed in a rectangular array; A third lead-out end is arranged at the other end of the third connecting terminal, the third lead-out end is connected to the third soldering pad, and the third lead-out ends of the third connecting terminals in each group are arranged at intervals along the length direction of the second card core; and The third extension end is located in the middle of the third connecting terminal. The third extension end is arranged in the second card core. The third extension end connects the third spring piece and the third lead-out end.

10. The card tray type three-choice-two SIM card holder according to claim 7, characterized in that: The iron shell comprises: A top plate, located above the second card core; The third side walls are provided in two groups, and the two groups of the third side walls extend downwardly on both sides in the width direction of the top plate; a fourth side wall connected to one side of the top plate in the length direction, the fourth side wall being located at one side of the second card core in the length direction, and the fourth side wall being used to define the position of the T card; and The fourth solder pin is connected to the bottom end of the third side wall. There are a plurality of the fourth solder pins, which are respectively located on both sides of the length direction of the third side wall, and the fourth solder pin is located below the first card core and the second card core. The top end of the fourth solder pin covers the bottom end of the first card core and the bottom end of the second card core, and the bottom end of the fourth solder pin is welded to the circuit board.

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