SIM card communication connection switching device and method

Abstract

The present invention discloses a SIM card communication connection switching device and method, which solves the technical problems in the prior art that the electronic student ID card is limited in configuration and is inconvenient for making video calls, and that the electronic student ID card cannot be used for calls when it is out of power. It includes a SIM card slot, an electronic switch, a first communication module, and a second communication module. The SIM card slot is connected to the first communication module or the second communication module through the electronic switch. The switching end of the electronic switch is used to control the switching common end to be connected to the first end or the second end; when the switching end detects the level signal of the first power supply, the switching end controls the common end to be connected to the first end and the first communication module; conversely, the common end is connected to the second end and the second communication module. The same SIM card can be used in different electronic devices, which is convenient for users and reduces the cost of use. It can be widely used in the field of electronic technology.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology, and in particular to a SIM card communication connection switching device and method. Background Art

[0002] To facilitate student management, schools usually provide each student with a student ID card. With the development of electronic information technology, integrated electronic student ID cards have gradually replaced traditional paper student ID cards. Because electronic student ID cards have functions such as calling, positioning, and attendance, they are deeply favored by parents and students.

[0003] Among them, the call function of the electronic student ID card provides convenience for students to communicate with the outside world. However, it is limited by the configuration and function of the electronic student ID card. For example, some schools prohibit the configuration of student ID cards with camera modules to ensure student safety. At the same time, due to the size of the student ID card, general electronic student ID cards do not have a display screen or the display screen is relatively small. The above problems make it inconvenient for students to use student ID cards for video calls. When students want to make video calls, they need to use the video card public telephone on campus, and the video public telephone requires the insertion of an IC card for dialing. This requires students to be equipped with a separate IC card for video calls or use the IC card when the electronic student ID card is out of power and cannot make calls. This not only increases the tediousness and inconvenience of students' video calls, but also increases the cost of student communications.

[0004] Therefore, there is an urgent need for a method that can use a SIM card for both electronic student ID card calls and visual card public telephone calls without disassembling the SIM card and without separately equipping an IC card. Summary of the Invention

[0005] In order to solve the problems existing in the above-mentioned prior art, the purpose of this application is to provide a SIM card communication connection switching device and method that can be used to realize the communication function of using the same SIM card by switching connections between different electronic devices.

[0006] To achieve the above-mentioned objectives, the first aspect of the present application provides a SIM card communication connection switching device, comprising a SIM card slot, an electronic switch, a first communication module and a second communication module, wherein the SIM card slot is connected to the first communication module or the second communication module through the electronic switch.

[0007] Preferably, the electronic switch includes a connection switching unit, and the connection switching unit includes:

[0008] A common end, a first end, and a second end, wherein the common end is connected to the SIM card slot, the first end is connected to the first communication module, and the second end is connected to the second communication module;

[0009] The switching end is used to control the switching common end to be connected to the first end or the second end. When the switching end detects the level signal of the first power supply, the switching end controls the common end to be connected to the first end and the first communication module, and the SIM card installed in the SIM card slot communicates through the first communication module; conversely, the common end is connected to the second end and the second communication module, and the SIM card installed in the SIM card slot communicates through the second communication module.

[0010] Preferably, the electronic switch is further provided with a power switching unit, comprising a power input terminal, the first power supply and a second power supply, wherein the power input terminal is connected to the first power supply or the second power supply via a power switching component.

[0011] Preferably, the SIM card slot and the second communication module are packaged together on a second circuit board of a second electronic device, and the first communication module is packaged on a first circuit board of another first electronic device.

[0012] Preferably, the second electronic device is provided with a SIM card adapter mechanism, comprising: a connector provided on the second circuit board and connected to the SIM card slot, a SIM card contact patch connected to the connector via a cable, and the SIM card contact patch is provided on the outer shell of the second electronic device.

[0013] Preferably, the first electronic device is provided with a card slot connected to the first communication module, and the second electronic device can be inserted into the card slot. When the SIM card contact patch is in contact and connected with the card slot, the electronic switch switches the SIM card slot to connect with the first communication module, and the SIM card installed in the SIM card slot communicates through the first communication module.

[0014] Preferably, the electronic switch is an analog switch chip;

[0015] The common terminal includes:

[0016] A common power pin connected to the SIM power pin of the SIM card;

[0017] A common reset pin connected to the SIM reset pin of the SIM card;

[0018] A common clock pin connected to a SIM clock pin of the SIM card;

[0019] A common data pin connected to the SIM data pin of the SIM card;

[0020] The first end includes:

[0021] a first power pin, a first reset pin, a first clock pin, and a first data pin;

[0022] The second end includes:

[0023] a second power pin, a second reset pin, a second clock pin, and a second data pin.

[0024] Preferably, the power input terminal is a power input pin, the power switching element is a MOS tube, the first power supply comes from a first electronic device, and the second power supply comes from a second electronic device;

[0025] When the level signal of the first power supply is connected, the G terminal of the MOS tube is at a high level, the MOS tube switch is turned off, and the first power supply supplies power to the electronic switch through the power input pin;

[0026] When there is no level signal of the first power supply, the G terminal of the MOS tube is at a low level, the MOS tube switch is turned on, and the second power supply supplies power to the electronic switch through the power input pin.

[0027] A second aspect of the present application provides a SIM card communication connection switching method, which is applied to any of the above-mentioned SIM card communication connection switching devices, and the method includes:

[0028] Detecting whether the first power supply has a level signal, and if so, switching the first power supply to power the electronic switch;

[0029] When the level signal of the first power source is detected, the switch end controls the common end to be connected to the first end and the first communication module, and the SIM card installed in the SIM card slot communicates through the first communication module.

[0030] Preferably, when no level signal of the first power supply is detected, the second power supply is switched to power the electronic switch; the switching end controls the common end to be connected with the second end and the second communication module, and the SIM card installed in the SIM card slot communicates through the second communication module.

[0031] The present invention has the following beneficial effects:

[0032] (1) The SIM card communication connection switching device of the present application is used to realize the communication function of using the same SIM card by switching the connection between different electronic devices. The SIM card slot is connected to the first communication module or the second communication module through the electronic switch, so that the SIM card can be connected to the base station through any communication module to realize functions such as calls and data exchange. Among them, when the switching end of the electronic switch detects the level signal of the first power supply, the switching end controls the common end to be connected to the first end and the first communication module, and the SIM card installed in the SIM card slot communicates through the first communication module; conversely, the SIM card is disconnected from the first communication module, the common end is connected to the second end and the second communication module, and the SIM card installed in the SIM card slot communicates through the second communication module. By using an electronic switch in this way to freely switch between the two communication module circuits, it is realized that the same SIM card can be used in different electronic devices, and there is no need to prepare different SIM cards or IC cards for different electronic devices, which is convenient for users to use and reduces the cost of use.

[0033] (2) The SIM card communication connection switching device of the present application is provided with an electronic switch further having a power switching unit. The power input terminal of the electronic switch is connected to the first power source or the second power source through the power switching unit, so that the first power source or the second power source supplies power to the electronic switch and the SIM card. When the second electronic device runs out of power and shuts down, the electronic switch and the SIM card can still be powered by the first electronic device, thereby realizing the communication function. That is, the SIM card can still be used for calls without the need for an additional IC card or a separate payment method. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of a SIM card communication connection switching device disclosed in an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of a framework for connecting a first electronic device and a second electronic device disclosed in an embodiment of the present invention;

[0036] Figure 3 A schematic structural diagram of a second electronic device disclosed in an embodiment of the present invention;

[0037] Figure 4 A schematic structural diagram of a SIM card transfer mechanism of a second electronic device disclosed in an embodiment of the present invention;

[0038] Figure 5 This is a structural diagram of a second electronic device plugged into a first electronic device disclosed in an embodiment of the present invention;

[0039] Figure 6 A schematic diagram of the circuit structure of an electronic switch disclosed in an embodiment of the present invention;

[0040] Figure 7 A schematic diagram of the circuit structure of a power switching unit of an electronic switch disclosed in an embodiment of the present invention;

[0041] Figure 8 A schematic diagram of the circuit structure of the connector disclosed in an embodiment of the present invention;

[0042] Figure 9 The present invention provides a flow chart of a method for switching a SIM card communication connection according to an embodiment of the present invention.

[0043] In the figure, 10, first electronic device; 11, first communication module; 12, card slot; 13, camera; 14, display; 20, second electronic device; 21, second communication module; 22, SIM card slot; 23, electronic switch; 24, connector; 25, cable; 26, SIM card contact patch. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] In the present invention, unless otherwise expressly specified or limited, the terms "connection" and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] SIM card: Also known as a subscriber identity card or smart card. A SIM card must be activated and inserted into the SIM card slot (or physical card slot) of an electronic device before use. For example, the electronic device can connect to the cellular network through it, enabling calls and data communications.

[0047] As described in the background, existing smart electronic student ID cards have a calling function. Specifically, these cards are equipped with a motherboard, a communication module, a SIM card slot, an antenna, a microphone, and a handset. Once a SIM card is inserted into the slot, calls can be made. However, due to limitations in the configuration and functionality of student ID cards, typical electronic student ID cards lack cameras, displays, or display screens that are relatively small, making it inconvenient for students to use them for video calls. To make video calls, students need a separate IC card to use video card-based public telephones on campus. Furthermore, to prevent calls from becoming unavailable due to a dead battery on their student ID cards, they also need to use an IC card to use the public telephones. Example 1

[0048] Based on the above problems, Figure 1 This is a framework diagram of a SIM card communication connection switching device provided according to some embodiments of the present application. In the present application, the SIM card communication connection switching device can be used to realize the use of the same SIM card for communication functions by switching connections between different electronic devices. Specifically, in some embodiments, the SIM card communication connection switching device of the present application is used to switch the connection of the SIM card between an electronic student ID card and a visual card public telephone. The visual card public telephone is equivalent to the first electronic device, and the electronic student ID card is equivalent to the second electronic device.

[0049] like Figure 1 As shown, a SIM card communication connection switching device includes a SIM card slot 22, an electronic switch 23, a first communication module 11 and a second communication module 21. The SIM card slot 22 is switched to connect to the first communication module 11 or the second communication module 21 through the electronic switch 23.

[0050] Furthermore, the electronic switch 23 includes a connection switching unit, which includes:

[0051] A common end, a first end, and a second end, the common end is connected to the SIM card slot 22 , the first end is connected to the first communication module 11 , and the second end is connected to the second communication module 21 .

[0052] The switching end is used to control the switching common end to be connected to the first end or the second end. When the switching end detects the level signal of the first power supply, the switching end controls the common end to be connected to the first end and the first communication module 11, and the SIM card installed in the SIM card slot 22 communicates through the first communication module 11; conversely, the common end is connected to the second end and the second communication module 21, and the SIM card installed in the SIM card slot 22 communicates through the second communication module 21.

[0053] In an embodiment of the present application, a SIM card is inserted into the SIM card slot 22, which is switched to connect to either the first communication module 11 or the second communication module 21 via an electronic switch 23, allowing the SIM card to connect to the base station network through either communication module, thereby enabling functions such as calls and data exchange. The control signal that triggers the electronic switch 23 to switch is as follows: when the switching end of the electronic switch 23 detects a level signal of the first power source, the switching end controls the common end to connect to the first end and the first communication module 11, and the SIM card installed in the SIM card slot 22 communicates through the first communication module 11; conversely, when the level signal of the first power source at the switching end of the electronic switch 23 is disconnected, the SIM card is disconnected from the first communication module 11, the common end connects to the second end and the second communication module 21, and the SIM card installed in the SIM card slot 22 communicates through the second communication module 21. In this way, an electronic switch 23 is used to freely switch between the two communication module circuits, so that the same SIM card can be used in different electronic devices. There is no need to prepare different SIM cards or IC cards for different electronic devices, which is convenient for users and reduces usage costs.

[0054] A specific application scenario on campus is as follows: the first communication module 11 is located in a video card public telephone, and the SIM card slot 22 and second communication module 21 are located in the electronic student ID card. When a regular call is needed, the second communication module 21 of the electronic student ID card is used to make a call. When a video call is needed or the electronic student ID card is out of power, the SIM card communication circuit can be switched by obtaining the level signal of the first power supply of the video card public telephone, connecting the SIM card slot 22 to the first communication module 11. Without removing the SIM card built into the electronic student ID card, a video call or regular call can be made using the video card public telephone.

[0055] Further, refer to Figure 2-Figure 4 As shown, the SIM card slot 22 and the second communication module 21 are packaged together on the second circuit board of the second electronic device 20 , and the first communication module 11 is packaged on the first circuit board of another first electronic device 10 .

[0056] The second electronic device 20 is provided with a SIM card adapter mechanism, including: a connector 24 provided on the second circuit board and connected to the SIM card slot 22, and a SIM card contact patch 26 connected to the connector 24 via a cable 25. The SIM card contact patch 26 is provided on the outer shell of the second electronic device 20.

[0057] In an embodiment of the present application, the SIM card and the SIM card slot 22 are both arranged inside the second electronic device 20. The information of the SIM card requires contact to be identified. Therefore, through the SIM card adapter mechanism, the path of connector 24-cable 25-SIM card contact patch 26 is used to electrically transmit the information of the SIM card to the SIM card contact patch 26 exposed on the outer shell of the second electronic device 20, so that without removing the SIM card, connectable and identifiable SIM card contacts can be provided externally, and the externally usable SIM card function is realized through the exposed SIM card contact patch 26. At this time, the second electronic device 20 can be used as an IC card.

[0058] Reference Figure 5 As shown, the first electronic device 10 is provided with a card slot 12 connected to the first communication module 11, and the second electronic device 20 can be inserted into the card slot 12. When the SIM card contact patch 26 contacts and connects with the card slot 12, the electronic switch 23 switches the SIM card slot 22 to connect with the first communication module 11, and the SIM card installed in the SIM card slot 22 communicates through the first communication module 11.

[0059] In the embodiment of the present application, the card slot 12 of the first electronic device 10 and the SIM card contact patch 26 of the second electronic device 20 serve as a connection intermediary, connecting the SIM card slot 22 to the first communication module 11. When the SIM card contact patch 26 connects with the contacts in the card slot 12, the level signal of the first power supply is transmitted to the switching end of the electronic switch 23 via the cable 25 and the connector 24. When the switching end detects the level signal of the first power supply, the switching end controls the common end to connect to the first end and the first communication module 11.

[0060] The specific application scenario on campus is as follows: a SIM card contact patch 26 is provided on the shell of the electronic student ID card. When the student needs to make a video call or the electronic student ID card is out of power and cannot be used, the electronic student ID card is inserted into the specific card slot 12 of the visual card public telephone. The visual card public telephone recognizes the SIM card information built into the electronic student ID card through the SIM card contact patch 26, and reads information such as the SIM card status, card balance, call package, and family number. Students can use the visual card public telephone as needed, such as making video calls through the camera 13 and display screen 14 on the visual card public telephone. The camera 13 is a high-definition camera and the display screen 14 is a 10-inch LCD screen. The video call image quality is high and the display is clear.

[0061] Furthermore, the electronic switch 23 is an analog switch chip;

[0062] The public end includes:

[0063] Common power pin, connected to the SIM power pin of the SIM card;

[0064] Common reset pin, connected to the SIM reset pin of the SIM card;

[0065] Common clock pin, connected to the SIM clock pin of the SIM card;

[0066] Common data pin, connected to the SIM data pin of the SIM card;

[0067] The first end includes:

[0068] a first power pin, a first reset pin, a first clock pin, and a first data pin;

[0069] The second end includes:

[0070] a second power pin, a second reset pin, a second clock pin, and a second data pin.

[0071] In the embodiment of the present application, in specific implementation, the model of the electronic switch 23 can be selected as BCT4699. Of course, other models of electronic switches 23 can also be selected as long as they can meet the use requirements. This embodiment does not impose specific restrictions on this.

[0072] Specifically, if Figure 6 As shown, the common power pin of the electronic switch 23 is COM1, which is connected to the VDD_SIM1 pin of the SIM card to provide power to the SIM card. The common reset pin is COM2, which is connected to the USIM_RST_N1 pin of the SIM card to reset the SIM card. The common clock pin is COM3, which is connected to the USIM_CLK1 pin of the SIM card to provide clock data to the SIM card. The common data pin is COM4, which is connected to the USIM_DATA1 pin of the SIM card to transmit data to the SIM card.

[0073] The first power pin is pin NO1, which is connected to the power input VLDO3_SIM2 pin of the first communication module 11. The first reset pin is pin NO2, which is connected to the reset pin USIM_RST_N2 of the first communication module 11. The first clock pin is pin NO3, which is connected to the clock pin USIM_CLK2 of the first communication module 11. The first data pin is pin NO4, which is connected to the data pin USIM_DATA2 of the first communication module 11. The second power pin is pin NC1, which is connected to the power input VDD_SIM_NFC of the second communication module 21. The second reset pin is pin NC2, which is connected to the reset pin USIM_RST_N of the second communication module 21. The second clock pin is pin NC3, which is connected to the clock pin USIM_CLK of the second communication module 21. The second data pin is pin NC4, which is connected to the data pin USIM_DATA of the second communication module 21.

[0074] The switching terminals of the electronic switch 23 are the 1_2 IN pin and the 3_4 IN pin, which are connected to the same channel control network, which includes the first power supply VDD_MCU and GND. When the first power supply is detected, the 1_2 IN pin and the 3_4 IN pin are at a high level. At this time, the pins at the common terminal are switched to connect to the pins in the first communication module mode, enabling communication between the SIM card and the first communication module 11. When the first power supply is not connected, the 1_2 IN pin and the 3_4 IN pin are at a low level. At this time, the pins at the common terminal are switched to connect to the pins in the second communication module mode, enabling communication between the SIM card and the second communication module 21.

[0075] In this application, the electronic switch 23 and the SIM card are both set in the second electronic device 20. If the second electronic device 20 runs out of power, it cannot supply power to the electronic switch 23 and the SIM card, and the electronic switch 23 cannot switch the communication connection for the SIM card.

[0076] To address this issue, in an embodiment of the present application, the electronic switch 23 is further provided with a power switching unit, comprising a power input terminal, a first power source, and a second power source. The power input terminal is connected to either the first power source or the second power source via a power switching element. The first power source or the second power source powers the electronic switch 23, enabling the electronic switch 23 and the SIM card to be powered by the first electronic device 10 even when the second electronic device 20 is powered off, thereby enabling communication.

[0077] Furthermore, the power input terminal is a power input pin, the power switching element is a MOS tube, the first power comes from the first electronic device 10, and the second power comes from the second electronic device 20;

[0078] When the level signal of the first power supply is connected, the G terminal of the MOS tube is at a high level, the MOS tube switch is turned off, and the first power supply supplies power to the electronic switch 23 through the power input pin;

[0079] When there is no level signal of the first power supply, the G terminal of the MOS tube is at a low level, the MOS tube switch is turned on, and the second power supply supplies power to the electronic switch 23 through the power input pin.

[0080] Reference Figure 7 As shown, in a specific embodiment of the present application, the power input pin of the electronic switch 23 is the VCC pin, which is connected to a power network through a MOS tube. The power network includes a first power supply VDD_MCU and a second power supply VLDO6_2V8. When the level signal of the first power supply VDD_MCU is detected, it is equivalent to the second electronic device 20 being plugged into the first electronic device 10. The MOS tube switch is turned off, and the first electronic device 10 is switched to power the electronic switch 23 and the SIM card. On the contrary, when the second electronic device 20 is used to make a call, there is no level signal of the first power supply, the G pin of the MOS tube is at a low level, the MOS tube switch is turned on, and the second electronic device 20 powers the electronic switch 23 and the SIM card. In this way, after the second electronic device 20 runs out of power and shuts down, the SIM card can be used to meet communication needs through the first electronic device 10.

[0081] A specific application scenario on campus is that the electronic student ID cards used by students are easy to carry and small in size. The limited space also limits the capacity of the internal battery. If the electronic student ID card runs out of power and shuts down on campus, it cannot be used for communication. Through the solution of this application, when the electronic student ID card runs out of power and shuts down, students can insert the electronic student ID card into a card-inserting public telephone with a corresponding card slot and use it, that is, no additional IC card or separate payment is required, and calls can still be made.

[0082] Reference Figure 8 As shown, Figure 8 In a specific implementation, the connector 24 is connected to various circuits of the first electronic device 10 via the flat cable 25 . Example 2

[0083] Reference Figure 9 As shown, the present application also provides a SIM card communication connection switching method, which is applied to the above-mentioned SIM card communication connection switching device, and the method includes:

[0084] The electronic switch 23 detects whether the first power supply has a level signal, and if so, switches the first power supply to power the electronic switch 23;

[0085] When the level signal of the first power source is detected, the switch end controls the common end to be connected with the first end and the first communication module 11 , and the SIM card installed in the SIM card slot 22 communicates through the first communication module 11 .

[0086] When no level signal of the first power supply is detected, the second power supply is switched to power the electronic switch 23 ; the switch end controls the common end to be connected with the second end and the second communication module 21 , and the SIM card installed in the SIM card slot 22 communicates through the second communication module 21 .

[0087] In an embodiment of the present application, a first communication module 11 is provided in a first electronic device 10 having a card slot 12 and a video call hardware configuration and a stable power supply. A SIM card slot 22, an electronic switch 23 and a second communication module 21 are provided in a second electronic device 20 having a call function hardware configuration. Generally, when a normal call is required, the second electronic device 20 is operated, and the SIM card makes a call through the second communication module 21 of the second electronic device 20. When a video call is required or the second electronic device 20 runs out of power and shuts down, the second electronic device 20 is inserted into the card slot 12 of the first electronic device 10, the electronic switch 23 detects the level signal of the first power supply, switches the first power supply to power the electronic switch 23, and at the same time, the switching end controls the common end to be connected to the first end and the first communication module 11, and the SIM card installed in the SIM card slot 22 communicates through the first communication module 11.

[0088] The above description is only a preferred specific embodiment of the present invention, and the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the protection scope of the present invention.

Claims

1. A SIM card communication connection switching device, characterized in that: It comprises a SIM card slot (22), an electronic switch (23), a first communication module (11) and a second communication module (21), wherein the SIM card slot (22) is switched to be connected to the first communication module (11) or the second communication module (21) via the electronic switch (23); The SIM card slot (22), the electronic switch (23) and the second communication module (21) are packaged together on a second circuit board of a second electronic device (20), and the second electronic device (20) is provided with a SIM card adapter mechanism; the first communication module (11) is packaged on a first circuit board of another first electronic device (10); The first electronic device (10) is provided with a card slot (12) connected to the first communication module (11), and the second electronic device (20) can be inserted into the card slot (12). When the second electronic device (20) is in contact with and connected to the card slot (12), the electronic switch (23) switches the SIM card slot (22) to be connected to the first communication module (11), and the SIM card installed in the SIM card slot (22) communicates through the first communication module (11); The electronic switch (23) comprises a connection switching unit, and the connection switching unit comprises: A common end, a first end, and a second end, wherein the common end is connected to the SIM card slot (22), the first end is connected to the first communication module (11), and the second end is connected to the second communication module (21); A switching end, the switching end is used to control the switching common end to be connected to the first end or the second end. When the switching end detects a level signal of the first power supply, the switching end controls the common end to be connected to the first end and the first communication module (11), and the SIM card installed in the SIM card slot (22) communicates through the first communication module (11); conversely, the common end is connected to the second end and the second communication module (21), and the SIM card installed in the SIM card slot (22) communicates through the second communication module (21).

2. The SIM card communication connection switching device according to claim 1, characterized in that: The electronic switch (23) is further provided with a power switching unit, comprising a power input terminal, the first power supply and a second power supply, wherein the power input terminal is connected to the first power supply or the second power supply via a power switching element.

3. The SIM card communication connection switching device according to claim 1, characterized in that: The SIM card transfer mechanism comprises: a connector (24) provided on the second circuit board and connected to the SIM card slot (22); and a SIM card contact patch (26) connected to the connector (24) via a flat cable (25); the SIM card contact patch (26) is provided on the outer housing of the second electronic device (20).

4. The SIM card communication connection switching device according to claim 1, characterized in that: The electronic switch (23) is an analog switch chip; The common terminal includes: A common power pin connected to the SIM power pin of the SIM card; A common reset pin connected to the SIM reset pin of the SIM card; A common clock pin connected to a SIM clock pin of the SIM card; A common data pin connected to the SIM data pin of the SIM card; The first end includes: a first power pin, a first reset pin, a first clock pin, and a first data pin; The second end includes: a second power pin, a second reset pin, a second clock pin, and a second data pin.

5. The SIM card communication connection switching device according to claim 2, characterized in that: The power input end is a power input pin, the power switching element is a MOS tube, the first power comes from a first electronic device (10), and the second power comes from a second electronic device (20); When the level signal of the first power supply is connected, the G pole of the MOS tube is at a high level, the MOS tube switch is turned off, and the first power supply supplies power to the electronic switch (23) through the power input pin; When no level signal of the first power supply is input, the G terminal of the MOS tube is at a low level, the MOS tube switch is turned on, and the second power supply supplies power to the electronic switch (23) through the power input pin.

6. A SIM card communication connection switching method, applied to the SIM card communication connection switching device according to claim 1, characterized in that: The method comprises: The electronic switch (23) detects whether the first power supply has a level signal, and if so, switches the first power supply to supply power to the electronic switch (23); When the level signal of the first power supply is detected, the switch end controls the common end to be connected to the first end and the first communication module (11), and the SIM card installed in the SIM card slot (22) communicates through the first communication module (11).

7. The SIM card communication connection switching method according to claim 6, characterized in that: When no level signal of the first power supply is detected, the second power supply is switched to supply power to the electronic switch (23); the switching end controls the common end to be connected with the second end and the second communication module (21), and the SIM card installed in the SIM card slot (22) communicates through the second communication module (21).

Images