CN112187303B - SIM card expansion equipment, SIM card switching method and device - Google Patents
SIM card expansion equipment, SIM card switching method and device Download PDFInfo
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- CN112187303B CN112187303B CN202011008014.XA CN202011008014A CN112187303B CN 112187303 B CN112187303 B CN 112187303B CN 202011008014 A CN202011008014 A CN 202011008014A CN 112187303 B CN112187303 B CN 112187303B
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- sim card
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3816—Mechanical arrangements for accommodating identification devices, e.g. cards or chips; with connectors for programming identification devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
- H04W8/183—Processing at user equipment or user record carrier
Abstract
The invention discloses an SIM card expansion device, an SIM card switching method and a device; the apparatus comprises: the system comprises a substitute wafer, a microprocessor, a change-over switch, at least 2 expansion slot positions, a signal path, a first power supply path and a second power supply path; receiving a trigger signal through a microprocessor, responding to the trigger signal to control the selector switch to switch gears, and controlling the second power supply path to supply power to the conducted SIM card; therefore, under the condition of not needing a battery and an external power supply to supply power, the support to a plurality of SIM cards is realized, and the free switching of a plurality of SIM cards is realized; and because the battery is not required to be integrated, the SIM card expansion equipment has lower hardware cost, relatively smaller volume and convenient carrying and use.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to an SIM card expansion device, an SIM card switching method and an SIM card switching device.
Background
Most current handsets, or other electronic devices that use a cellular network, typically have 1 SIM card slot in themselves. In some scenarios, however, such electronic devices may need to connect a greater number of SIM cards simultaneously and switch between the networks supported by each SIM card. At this time, the method needs to be realized by an external SIM card expansion device.
The existing SIM card expansion device can integrate a plurality of SIM card slots on an expansion circuit board, and integrate a microprocessor (MCU for short) and a battery, that is, it is equivalent to an independent small device. The microprocessor can keep working state all the time and automatically realize the control and switching of the SIM card access under specific conditions. The prior art has the defects that the hardware cost of the equipment is high, the volume is relatively large and the portability is poor due to the integration of the battery.
Disclosure of Invention
The invention provides an SIM card expansion device, an SIM card switching method and an SIM card switching device, which are used for at least solving the technical problems in the prior art.
In a first aspect, the present invention provides a SIM card extension device, including: the system comprises a substitute wafer, a microprocessor, a change-over switch, at least 2 expansion slot positions, a signal path, a first power supply path and a second power supply path;
the substitute contact is used for being placed in a SIM card slot of the electronic equipment and connected with a cellular module of the electronic equipment; the substitute contact is connected with the microprocessor through the first power supply path; the substitute contact is connected with the selector switch through the signal path and the second power supply path;
the change-over switch is connected with each expansion slot position, and each expansion slot position is used for placing an SIM card; the change-over switch enables the SIM card in any one of the expansion slot positions to be conducted with the signal path and the second power supply path through changing over gears;
the microprocessor is connected with the change-over switch; the microprocessor is connected with the second power supply path; the microprocessor receives a trigger signal of a cellular module of the electronic equipment through the first power supply path and responds to the trigger signal to control the selector switch to switch gears, and the microprocessor controls the second power supply path to supply power to the conducted SIM card.
Preferably, the second power supply path includes: a slow start circuit structure;
the step of controlling the second power supply path by the microprocessor to supply power to the conducted SIM card includes supplying power to the conducted SIM card through the slow start circuit after the microprocessor controls the change-over switch to change the gear.
Preferably, the apparatus further comprises: an enable pin; the microprocessor is connected with the change-over switch, and the microprocessor is connected with the change-over switch through the enabling pin;
the microprocessor responds to the trigger signal to control the selector switch to switch gears; after receiving the trigger signal, the microprocessor sends a switching instruction to the enabling pin through a corresponding control interface; and the enabling pin controls the selector switch to switch gears according to the switching instruction.
Preferably, the expansion slot includes: a first expansion slot position, a second expansion slot position and a third expansion slot position;
the control interface comprises a first control interface and a second control interface; the enabling pins comprise a first enabling pin and a second enabling pin; the change-over switch comprises a first change-over switch and a second change-over switch; each change-over switch comprises a first gear and a second gear respectively;
the first control interface is connected with the first enabling pin, and the first enabling pin is connected with the first selector switch; the second control interface is connected with the second enabling pin, and the second enabling pin is connected with the second change-over switch;
a first gear of the first change-over switch is connected with the first expansion slot position, and a second gear of the first change-over switch is connected with the second change-over switch; the first gear of the second change-over switch is connected with the second expansion slot position, and the second gear of the second change-over switch is connected with the third expansion slot position.
In a second aspect, the present invention provides a SIM card switching method, where the method is applied to the SIM card expansion device according to the first aspect, and the method includes:
responding to a trigger signal to control the selector switch to switch gears so that the SIM card in the target expansion slot is conducted with the signal path and the second power supply path;
controlling a second power supply path to supply power to the SIM card in the target expansion slot position; and the SIM card in the target expansion slot position performs data interaction with a cellular module of the electronic equipment through the signal path.
Preferably, the receiving the trigger signal includes:
when the cellular module of the electronic equipment is powered on again, the triggering signal generated by the cellular module being powered on again is received through the first power supply path.
Preferably, the controlling of the change-over switch to change over the shift position in response to the trigger signal includes:
according to the trigger signal, a switching instruction is sent to the enabling pin through a corresponding control interface; so that the enabling pin controls the selector switch to switch gears according to the switching instruction.
Preferably, the sending the switching instruction to the enable pin through the corresponding control interface includes:
setting a register state value of the corresponding control interface such that the enable pin learns the register state value as the switch instruction.
Preferably, the controlling the second power supply path to supply power to the SIM card in the target expansion slot includes:
and after the gear of the change-over switch is controlled to be switched, supplying power to the SIM card in the target expansion slot position through a slow start circuit in the second power supply path.
In a third aspect, the present invention provides a SIM card switching apparatus, including:
the switching control module is used for responding to a trigger signal to control the switching switch to switch gears so as to enable the SIM card in the target expansion slot position to be conducted with the signal path and the second power supply path;
the power supply control module is used for controlling a second power supply path to supply power to the SIM card in the target expansion slot position; and the SIM card in the target expansion slot position performs data interaction with a cellular module of the electronic equipment through the signal path.
Compared with the prior art, the SIM card expansion equipment, the SIM card switching method and the device provided by the invention receive the trigger signal through the microprocessor, respond to the trigger signal to control the switching switch to switch the gear, and control the second power supply path to supply power to the conducted SIM card; therefore, under the condition of not needing a battery or other built-in power supplies, the support to a plurality of SIM cards is realized, and the free switching of the plurality of SIM cards is realized; and because the battery is not required to be integrated, the SIM card expansion equipment has lower hardware cost, relatively smaller volume and convenient carrying and use.
Drawings
Fig. 1 is a schematic structural diagram of an SIM card expansion device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a shift relationship of a switch in an SIM card expansion device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another SIM card expansion device according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a method for switching an SIM card according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a SIM card switching apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Most current handsets, or other electronic devices that use a cellular network (e.g., public machines, routers, etc. with a cellular module and a SIM card slot), themselves typically have 1 SIM card slot. Some electronic devices may have dual SIM card slots, so-called "dual card dual standby". In some particular scenarios, however, such electronic devices may need to connect a greater number of SIM cards simultaneously and switch between the networks supported by each SIM card. At this time, the electronic equipment needs to be simply modified by means of the external SIM card expansion equipment, so as to realize the support function of a larger number of SIM cards.
The existing SIM card expansion device can integrate a plurality of expansion slots on an expansion circuit board, and integrate a microprocessor (MCU for short) and a battery, that is, it is equivalent to an independent small device. In the using process, the substitute contact of the SIM card expansion equipment inserts a substitute SIM card into a SIM card slot of the electronic equipment; and the plurality of SIM cards are respectively inserted into the expansion slot positions. The microprocessor can keep working state all the time and automatically realize the control and switching of the SIM card access under specific conditions.
The SIM card expansion device of the prior art has the disadvantages of high hardware cost, relatively large volume and poor portability due to the integration of the battery.
Therefore, embodiments of the present invention are to provide a SIM card expansion device, so as to solve at least the above technical problems in the prior art. As shown in fig. 1, the SIM card expansion device 00 in this embodiment includes: the system comprises a substitute contact 10, a microprocessor 20, a change-over switch 30, at least 2 expansion slot positions 40, a signal path, a first power supply path and a second power supply path. In the SIM card expansion device 00, the connection relationship of the respective parts is as follows:
the substitute contact 10 is connected to the microprocessor 20 through the first power supply path. The substitute contact 10 is connected to the changeover switch 30 through the signal path and the second power supply path. The selector switch 30 is connected to each of the extended slot positions 40. The microprocessor 20 is connected to the changeover switch 30. The microprocessor 20 is connected to the second power supply path.
In the use process of the SIM card expansion device 00, the substitute contact 10 is placed in a SIM card slot of the electronic device, and each contact in the substitute contact 10 contacts with a corresponding contact in the SIM card slot of the electronic device, so as to achieve connection with the cellular module of the electronic device. Each of the extended slots 40 accommodates a SIM card.
According to the structure, the SIM card expansion device 00 realizes the expansion of the SIM card. The electronic equipment is externally connected with the SIM card expansion equipment 00, so that the electronic equipment has the function of supporting multiple SIM cards.
Since the SIM card expansion device 00 in this embodiment does not include a battery or any other built-in power supply, all electrical signals and power are obtained from the electronic device through the substitute contact 10. The signal path, the first power supply path and the second power supply path are used for completing the acquisition of the electric signals and the power supply. The method comprises the following specific steps:
the signal path is used for completing data interaction between the SIM card and the cellular module of the electronic equipment. Specifically, when the SIM card in any expansion slot 04 is turned on by the switch 03, the SIM card in the expansion slot 04 can be connected to the signal path, and further connected to the substitute contact 10, and data interaction with the cellular module is realized through the substitute contact 10. The signal path may specifically include a clock path, a data path, a reset path, and a ground line.
The first power supply path connects the substitute contact 10 and the microprocessor 20, and is used for obtaining the electric energy in the electronic device through the substitute contact 10 to supply power to the microprocessor, and also used for transmitting the trigger signal to the microprocessor 20 for the microprocessor 20 to respond under specific conditions.
The second power supply path is connected to the substitute contact 10, the microprocessor 20 and the switch 30. When the SIM card in any expansion slot 04 is turned on by the switch 03, the SIM card in the expansion slot 04 may also be connected to the second power supply path. After the connection, the microprocessor 20 may control the second power supply path to supply power to the SIM card in the expansion slot 04, so that the SIM starts to operate and performs data interaction with the cellular module.
In this embodiment, the specific signaling interaction process is as follows:
when the cellular module is abnormal based on the communication of the cellular network, the cellular network signal supported by the SIM card working at the time can be considered to be unstable. In this case, in this embodiment, the SIM card expansion device 00 is used to implement SIM card switching, so as to automatically select a better cellular network for the electronic device, and ensure the communication quality thereof.
When the communication of the cellular module is abnormal, the electronic equipment can set the cellular module to restart, namely the cellular module is powered off firstly and then powered on again. In the restarting process, the first power supply path stops supplying power along with the power failure of the cellular module and supplies power again along with the power on of the cellular module. I.e., microprocessor 20 will also power down/up in synchronization with the cellular module. The action of powering up the microprocessor 20 again in the SIM card expansion device 00 is set as the microprocessor 20 receiving the trigger signal of the cellular module.
After receiving the trigger signal, microprocessor 20 may control switch 30 to switch the gear in response to the trigger signal. The switch 30 can make the SIM card in any extended slot 40 conducted with the signal path and the second power supply path by switching the gear; in other words, is conductive with the substitute contact 10. At this time, under the trigger of the trigger signal, the SIM card with unstable network signal before switching is no longer conducted with the substitute contact 10 by switching the gear. And the SIM card in the other extended slot 40 after switching can be conducted with the substitute contact 10. Then, the microprocessor 20 controls the second power supply path to supply power to the switched SIM card, so that the switched SIM card starts to work and performs data interaction with the cellular module. To this end, the SIM card extension device 00 realizes automatic switching of SIM cards.
In the present embodiment, the specific process of controlling the shift switch 30 to shift the gear by the microprocessor 20 can be specifically described as follows:
the SIM card expansion device 00 further includes: pin 50 is enabled. The Enable pin 50, known in the art as OE (Output Enable). The microprocessor 20 can be connected to the changeover switch 30 via an enable pin 50. Specifically, the microprocessor 20 includes at least one control interface 21, such as a GPIO interface (General-purpose input/output); via this control interface 21, the microprocessor 20 can be connected to an enable pin 50; the enable pin 50 may then be directly connected to the switch 30.
After receiving the trigger signal, the microprocessor 20 sends a switching instruction to the enable pin 50 through the control interface 21. The specific way for the microprocessor 20 to send the switch instruction may be: it is realized by the program that the microprocessor 20 fixedly resets the register state values of the control interface 21 after being powered up again. The state values of a register typically have two states, 0 and 1. The state value of the register may be set to 1 at this time. Meaning that the control interface 21 is capable of outputting a high signal. The enable pin 50 is informed of the high signal, i.e. is considered to be instructed to switch. Further, the enable pin 50 may control the switch 30 to switch the shift position according to the switching instruction.
According to the technical scheme, the beneficial effects of the embodiment are as follows: the SIM card expansion equipment receives a trigger signal through a microprocessor, responds to the trigger signal to control the selector switch to switch the gear, and controls the second power supply path to supply power to the conducted SIM card; therefore, under the condition of not needing a battery or other built-in power supplies, the support to a plurality of SIM cards is realized, and the free switching of the plurality of SIM cards is realized; and because the battery is not required to be integrated, the SIM card expansion equipment has lower hardware cost, relatively smaller volume and convenient carrying and use.
Only the case where 2 expansion slots 40 are included in the SIM card expansion device is shown in fig. 1. In combination with the control switching manner included in the above embodiment, the SIM card extension device in the present invention can theoretically realize support and free switching for multiple SIM cards. In the embodiment, another SIM card extension device 01 is further disclosed for the actual situation that the number of the current domestic mainstream network operators is 3. The SIM card extension device 01 in this embodiment can support 3 SIM cards at the same time. On the basis of the embodiment shown in fig. 1, the SIM card expansion device 01 further has the following technical features:
the number of the expansion slot positions 40 in the SIM card expansion device 01 is 3; the method specifically comprises the following steps: a first extended slot position 41, a second extended slot position 42, and a third extended slot position 43. The number of control interfaces 21 is 2; specifically, the controller includes a first control interface 211 and a second control interface 212. The number of enable pins 50 is 2; specifically, a first enable pin 51 and a second enable pin 52 are included. The number of the changeover switches 30 is 2; specifically, the device comprises a first switch 31 and a second switch 32; and each of the change-over switches 30 has two gear positions, i.e., includes a first gear position and a second gear position, respectively. Each of the switches 30 is switchable between the first gear and the second gear once in response to a switching instruction of the enable pin 50.
The specific connection relationship of the above parts is shown in fig. 2, specifically: the first control interface 211 is connected to the first enable pin 51, and the first enable pin 51 is connected to the first switch 31. The second control interface 212 is connected to the second enable pin 52, and the second enable pin 52 is connected to the second switch 32. A first gear of the first switch 31 connects the first extended slot 41, and a second gear of the first switch 31 connects the second switch 32; the first gear of the second switch 32 is connected to the second expansion slot 42, and the second gear of the second switch is connected to the third expansion slot 43.
According to the above structure, the first control interface 211 can control the first switch 31 to switch between the first gear and the second gear through the first enable pin 51; the second control interface 212 can control the second switch 32 to switch between the first gear and the second gear through the second enable pin 52. The principle is the same as in the previous embodiment, and a description thereof will not be repeated.
When the first switch 31 is in the first gear, the first expansion slot 41 is turned on, and the SIM card therein is in an operating state. When the second switch 32 is turned off by the first switch 31, neither the second extended slot position 42 nor the third extended slot position 43 is turned on.
When the first switch 31 is in the second position, the first extended slot 41 is turned off, and the second switch 32 is turned on by the first switch 31. At this time, when the second switch 32 is in the first position, the second extension slot 42 is turned on, and the SIM card therein is in an operating state. Or the second switch 32 is in the second position, the third extension slot 43 is turned on, and the SIM card therein is in the working state.
In the above structure, by switching the positions of the first switch 31 and the second switch 32, it can be ensured that only one of the three expansion slot positions 40 is always in the on state, that is, only one SIM card works normally at the same time, and mutual conflict among multiple SIM cards is avoided. The SIM card extension device 01 thus implements support and switching of 3 SIM cards. Of course, by expanding the above structure in this way, the SIM card expansion device 01 may also support a larger number of SIM cards.
It should be noted that in the embodiments shown in fig. 1 to fig. 2, the power supply to the SIM card after switching through the second power supply path should occur in time sequence after the switch 30 completes switching, that is, the SIM card after switching is conducted with the second power supply path. Otherwise, the electric energy is conducted to the SIM card before switching through the second power supply path, so that the effect of SIM card switching cannot be achieved. In practice, however, the time for the switching process is extremely short, so that there is a possibility that the switching switch 30 has not yet completed the switching and the power supply of the second power supply path has already started.
It may be preferable to add a soft start circuit structure in the second power supply path, as shown in fig. 3. The microprocessor 20 will supply power to the switched SIM card through the slow start circuit after controlling the switch 30 to switch the gear. The function of the slow start circuit structure is to delay the power supply of the second power supply path in time, so as to ensure that the power supply of the second power supply path is started only after the switched SIM card is conducted with the second power supply path. The slow start circuit structure can be constructed based on the MOS transistor, the specific structure of the slow start circuit structure is not limited in this embodiment, and any circuit structure capable of achieving the same or similar effect can be combined in the overall technical solution of the present invention.
Fig. 4 shows a specific embodiment of the SIM card switching method according to the present invention. In this embodiment, the method is applied to the SIM card expansion device in the embodiments shown in fig. 1 to 3. That is, the method in this embodiment describes a mechanism for switching the SIM card in the SIM card extension apparatus. The method specifically comprises the following steps:
When the cellular module of the electronic equipment is powered on again, the triggering signal generated by the cellular module being powered on again is received through the first power supply path. When the communication of the cellular module is abnormal, the electronic equipment can set the cellular module to restart, namely the cellular module is powered off firstly and then powered on again. In the restarting process, the first power supply path stops supplying power along with the power failure of the cellular module and supplies power again along with the power on of the cellular module. I.e., microprocessor 20 will also power down/up in synchronization with the cellular module. Therefore, the power-up of the microprocessor 20 can be set to be the trigger signal received by the microprocessor 20.
According to the trigger signal, the microprocessor 20 may send a switching instruction to the enable pin 50 through the corresponding control interface 21; so that the enable pin 50 controls the switch 30 to switch the shift position according to the switching instruction. Specifically, the microprocessor 20 is programmed to fixedly reset the register state values of the control interface 21 after being powered on again. The state values of a register typically have two states, 0 and 1. The state value of the register may be set to 1 at this time. Meaning that the control interface 21 is capable of outputting a high signal. The enable pin 50 is informed of the high signal, i.e. is considered to be instructed to switch. Further, the enable pin 50 may control the switch 30 to switch the shift position according to the switching instruction.
After gear switching is completed, the SIM card in the switched target expansion slot position is conducted with the signal path and the second power supply path.
And 402, controlling a second power supply path to supply power to the SIM card in the target expansion slot position.
Specifically, a slow start circuit structure may be added to the second power supply path, and after the microprocessor 20 controls the switch 30 to switch the gear, the slow start circuit is used to start the SIM card in the target expansion slot. The function of the slow start circuit structure is to delay the power supply of the second power supply path in time, so as to ensure that the power supply of the second power supply path is started only after the switched SIM card is conducted with the second power supply path. The slow start circuit structure can be constructed based on the MOS transistor, the specific structure of the slow start circuit structure is not limited in this embodiment, and any circuit structure capable of achieving the same or similar effect can be combined in the overall technical solution of the present invention.
After the power is conducted and supplied, the SIM card in the target expansion slot position can perform data interaction with the cellular module of the electronic equipment through the signal path.
Fig. 5 shows an embodiment of the SIM card switching apparatus according to the present invention. The apparatus of this embodiment, i.e. the apparatus for performing the method of fig. 4. The technical solution is essentially the same as that in the above embodiment, and the corresponding description in the above embodiment is also applicable to this embodiment. The device in this embodiment includes:
and the switching control module 501 is configured to control the switch to switch the gear in response to a trigger signal, so that the SIM card in the target expansion slot is conducted with the signal path and the second power supply path.
A power supply control module 502, configured to control a second power supply path to supply power to the SIM card in the target expansion slot; and the SIM card in the target expansion slot position performs data interaction with a cellular module of the electronic equipment through the signal path.
In addition, the term "connected" in the embodiments of the present invention means "electrically connected".
The basic principles of the present invention have been described above with reference to specific embodiments, but it should be noted that the advantages, effects, etc. mentioned in the present invention are only examples and are not limiting, and the advantages, effects, etc. must not be considered to be possessed by various embodiments of the present invention. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the invention is not limited to the specific details described above.
The block diagrams of devices, apparatuses, systems involved in the present invention are only given as illustrative examples and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. The words "or" and "as used herein mean, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
It should also be noted that in the apparatus, devices and methods of the present invention, the components or steps may be broken down and/or re-combined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the invention to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.
Claims (8)
1. A SIM card expansion device, characterized in that the device comprises: the system comprises a substitute wafer, a microprocessor, a change-over switch, at least 2 expansion slot positions, a signal path, a first power supply path and a second power supply path;
the substitute contact is used for being placed in a SIM card slot of the electronic equipment and connected with a cellular module of the electronic equipment; the substitute contact is connected with the microprocessor through the first power supply path; the substitute contact is connected with the selector switch through the signal path and the second power supply path;
the change-over switch is connected with each expansion slot position, and each expansion slot position is used for placing an SIM card; the change-over switch enables the SIM card in any one of the expansion slot positions to be conducted with the signal path and the second power supply path through changing over gears;
the microprocessor is connected with the change-over switch; the microprocessor is connected with the second power supply path; the microprocessor receives a trigger signal of a cellular module of the electronic equipment through the first power supply path and responds to the trigger signal to control the selector switch to switch gears, and the microprocessor controls the second power supply path to supply power to the conducted SIM card;
the second power supply path includes: a slow start circuit structure;
the step of controlling the second power supply path by the microprocessor to supply power to the conducted SIM card includes supplying power to the conducted SIM card through the slow start circuit after the microprocessor controls the change-over switch to change the gear.
2. The SIM card expansion device of claim 1, wherein the device further comprises: an enable pin; the microprocessor is connected with the change-over switch, and the microprocessor is connected with the change-over switch through the enabling pin;
the microprocessor responds to the trigger signal to control the selector switch to switch gears; after receiving the trigger signal, the microprocessor sends a switching instruction to the enabling pin through a corresponding control interface; and the enabling pin controls the selector switch to switch gears according to the switching instruction.
3. The SIM card expansion device of claim 2, wherein the expansion slot comprises: a first expansion slot position, a second expansion slot position and a third expansion slot position;
the control interface comprises a first control interface and a second control interface; the enabling pins comprise a first enabling pin and a second enabling pin; the change-over switch comprises a first change-over switch and a second change-over switch; each change-over switch comprises a first gear and a second gear respectively;
the first control interface is connected with the first enabling pin, and the first enabling pin is connected with the first selector switch; the second control interface is connected with the second enabling pin, and the second enabling pin is connected with the second change-over switch;
a first gear of the first change-over switch is connected with the first expansion slot position, and a second gear of the first change-over switch is connected with the second change-over switch; the first gear of the second change-over switch is connected with the second expansion slot position, and the second gear of the second change-over switch is connected with the third expansion slot position.
4. A SIM card switching method, which is applied to the SIM card expansion device of any one of claims 1 to 3, the method comprising:
responding to a trigger signal to control the selector switch to switch gears so that the SIM card in the target expansion slot is conducted with the signal path and the second power supply path;
controlling a second power supply path to supply power to the SIM card in the target expansion slot position; the SIM card in the target expansion slot position carries out data interaction with a cellular module of the electronic equipment through the signal path;
the controlling the second power supply path to supply power to the SIM card in the target expansion slot comprises:
and after the gear of the change-over switch is controlled to be switched, supplying power to the SIM card in the target expansion slot position through a slow start circuit in the second power supply path.
5. The method of claim 4, wherein receiving the trigger signal comprises:
when the cellular module of the electronic equipment is powered on again, the triggering signal generated by the cellular module being powered on again is received through the first power supply path.
6. The method of claim 5, wherein said controlling the toggle switch to shift the gear in response to the trigger signal comprises:
according to the trigger signal, a switching instruction is sent to an enabling pin through a corresponding control interface; so that the enabling pin controls the selector switch to switch gears according to the switching instruction.
7. The method of claim 6, wherein sending the switching command to the enable pin through the corresponding control interface comprises:
setting a register state value of the corresponding control interface such that the enable pin learns the register state value as the switch instruction.
8. A SIM card switching apparatus, characterized in that the apparatus comprises:
the switching control module is used for responding to the trigger signal to control the switching switch to switch the gear so as to enable the SIM card in the target expansion slot position to be conducted with the signal path and the second power supply path;
the power supply control module is used for controlling a second power supply path to supply power to the SIM card in the target expansion slot position; the SIM card in the target expansion slot position carries out data interaction with a cellular module of the electronic equipment through the signal path;
the controlling the second power supply path to supply power to the SIM card in the target expansion slot comprises: and after the gear of the change-over switch is controlled to be switched, supplying power to the SIM card in the target expansion slot position through a slow start circuit in the second power supply path.
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| CN113050767A (en) * | 2021-03-30 | 2021-06-29 | 联想(北京)有限公司 | Expansion slot channel distribution method and device, electronic equipment and medium |
| CN117676541A (en) * | 2024-01-23 | 2024-03-08 | 北京云软在线通信技术有限公司 | External SIM card expansion device, external SIM card expansion device and external SIM card switching method |
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