Liquid inlet detection circuit and electronic equipment

Abstract

The utility model relates to a liquid inlet detection circuit and electronic equipment, the liquid inlet detection circuit is applied to the electronic equipment, the electronic equipment comprises a card insertion area and a non-card insertion area, the non-card insertion area is located on at least one side of the card insertion area, and the card insertion area is used for inserting an SIM card and / or an SD card; the liquid inlet detection circuit comprises a voltage division module, a detection module and a processing module, the first end of the voltage division module is electrically connected with the power supply end, the second end of the voltage division module and the first end of the detection module are electrically connected with the processing module, and the second end of the detection module is grounded; the processing module controls the on-off of the power supply of the SIM card and / or the power supply of the SD card according to the electric signal of the connection point of the first end of the voltage division module and the first end of the detection module; wherein the voltage dividing module is located in the non-card insertion area, and the detection module is located in the card insertion area. Through the technical scheme disclosed by the invention, the liquid inlet corrosion risk of the electronic equipment is reduced, and the use safety of the electronic equipment is improved.

Description

Technical Field

[0001] This disclosure relates to the field of circuit technology, and in particular to a liquid ingress detection circuit and electronic device. Background Technology

[0002] Most mobile phones, tablets, and other electronic devices nowadays support SIM and SD card functionality. Liquid can easily seep into the card tray and device casing, causing corrosion and leading to problems such as burnt cards and devices failing to power on.

[0003] In the prior art, a waterproof sleeve can be set at the card slot of an electronic device. However, the waterproof sleeve is detachably connected to the main body of the electronic device along with the card tray. During the process of removing the waterproof sleeve along with the card tray, wear and aging problems will occur, which will lead to the risk of liquid ingress and corrosion of the electronic device. Utility Model Content

[0004] To solve the above-mentioned technical problems, or at least partially solve them, this disclosure provides a liquid ingress detection circuit and electronic device, which reduces the risk of liquid ingress corrosion of electronic devices and improves the safety of electronic devices in use.

[0005] In a first aspect, embodiments of this disclosure provide a liquid ingress detection circuit applied to an electronic device, the electronic device including a card insertion area and a non-card insertion area, the non-card insertion area being located on at least one side of the card insertion area, the card insertion area being used to insert a SIM card and / or an SD card;

[0006] The liquid inlet detection circuit includes: a pressure divider module, a detection module, and a processing module;

[0007] The first terminal of the voltage divider module is electrically connected to the power supply terminal, the second terminal of the voltage divider module and the first terminal of the detection module are electrically connected to the processing module, and the second terminal of the detection module is grounded;

[0008] The processing module controls the on / off state of the power supply of the SIM card and / or the power supply of the SD card based on the electrical signal at the connection point of the first end of the voltage divider module and the first end of the detection module.

[0009] The voltage divider module is located in the non-card insertion area, and the detection module is located in the card insertion area.

[0010] Optionally, the card insertion area includes a card tray, a card holder, and a filling material. The card tray and the card holder are detachably connected. The card holder is fixed to the main board of the electronic device. The filling material is filled between the card holder and the non-card insertion area.

[0011] The detection module is located between the filling material and the card holder.

[0012] Optionally, the non-card insertion area includes a shielded area, and the voltage divider module is located within the shielded area.

[0013] Optionally, the processing module includes a general-purpose input / output interface, which is electrically connected to the connection point between the first end of the voltage divider module and the first end of the detection module.

[0014] Optionally, the processing module includes an analog-to-digital conversion interface, which is electrically connected to the connection point between the first end of the voltage divider module and the first end of the detection module.

[0015] Optionally, the voltage divider module includes a first resistor, a first end of which is electrically connected to a power supply terminal, and a second end of which is electrically connected to a first terminal of the detection module.

[0016] Optionally, the detection module includes a second resistor, the first end of which is electrically connected to the second end of the voltage divider module, and the second end of which is grounded.

[0017] Optionally, the second resistor includes a first pad and a second pad; the first pad serves as the first end of the second resistor, and the second pad serves as the second end of the second resistor.

[0018] Optionally, the liquid ingress detection circuit further includes: a power management module electrically connected to the processing module, the power management module being electrically connected to the power supply of the SIM card, and the power management module receiving a control signal from the processing module to control the on / off state of the power supply of the SIM card;

[0019] And / or, the power management module is electrically connected to the power supply of the SD card, and the power management module receives the control signal issued by the processing module to control the on / off state of the power supply of the SD card.

[0020] Secondly, embodiments of this disclosure also provide an electronic device, including the liquid ingress detection circuit as described in the first aspect.

[0021] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0022] The liquid ingress detection circuit disclosed herein is applied to an electronic device, which includes a card insertion area and a non-card insertion area, the non-card insertion area being located on at least one side of the card insertion area. The card insertion area is used to insert a SIM card and / or an SD card. The liquid ingress detection circuit includes a voltage divider module, a detection module, and a processing module. A first terminal of the voltage divider module is electrically connected to a power supply terminal, and a second terminal of the voltage divider module and a first terminal of the detection module are electrically connected to the processing module. The second terminal of the detection module is grounded. The processing module controls the on / off switching of the power supply to the SIM card and / or the power supply to the SD card based on the electrical signal at the connection point between the first terminal of the voltage divider module and the first terminal of the detection module. The voltage divider module is located in the non-card insertion area, and the detection module is located in the card insertion area. Therefore, by placing the detection module in the card insertion area, this disclosure enables the detection module to detect water ingress in a timely manner. By placing the voltage divider module in the non-card insertion area, it avoids the voltage divider module being short-circuited due to water ingress in the card insertion area, thus preventing inaccurate electrical signals at the connection point between the first terminal of the voltage divider module and the first terminal of the detection module from affecting the processing module. Furthermore, by utilizing the change in electrical signal at the connection point between the first end of the voltage divider module and the first end of the detection module, the processing module determines whether liquid has entered the card insertion area, and controls the disconnection of the power supply to the SIM card and / or the power supply to the SD card, thus preventing problems such as liquid entering the card insertion area, corroding and burning the card, and electronic devices failing to power on. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure;

[0026] Figure 2 This is a schematic diagram of the structure of a liquid inlet detection circuit provided in an embodiment of this disclosure.

[0027] The components include: 1. Voltage divider module; 2. Detection module; 3. Processing module; 4. Power management module; 5. Card tray; 6. Card socket; 7. Filling material; 8. Structural housing; A. Card insertion area; B. Non-card insertion area; C. Shielding area; R1: First resistor; R2: Second resistor; 21. First solder pad; 22. Second solder pad; VCC: Power supply terminal. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0029] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0030] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. Figure 2 This is a schematic diagram of a liquid inlet detection circuit provided in an embodiment of this disclosure. (Combined with...) Figure 1 and Figure 2 The liquid ingress detection circuit is applied to an electronic device, which includes a card insertion area A and a non-card insertion area B. The non-card insertion area B is located on at least one side of the card insertion area A. The card insertion area A is used to insert a SIM card and / or an SD card. The liquid ingress detection circuit includes: a voltage divider module 1, a detection module 2, and a processing module 3. The first end of the voltage divider module 1 is electrically connected to the power supply terminal VCC, and the second end of the voltage divider module 1 and the first end of the detection module 2 are electrically connected to the processing module 3. The second end of the detection module 2 is grounded. The processing module 3 controls the on / off switching of the power supply to the SIM card and / or the power supply to the SD card based on the electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2. The voltage divider module 1 is located in the non-card insertion area B, and the detection module 2 is located in the card insertion area A.

[0031] Specifically, the liquid ingress detection device provided in this disclosure embodiment can be applied to electronic devices, such as card insertion area A and non-card insertion area B, where card insertion area A is used to insert at least one of SIM card and SD card. Figure 1 The example shows a non-card insertion area B located on at least one side of the card insertion area A. The main board of the non-card insertion area B of the electronic device can be used to arrange related devices in the electronic device, which is well known to those skilled in the art and will not be described in detail here.

[0032] Continue to refer to Figure 1 and Figure 2The liquid ingress detection circuit includes a voltage divider module 1, a detection module 2, and a processing module 3. The first terminal of the voltage divider module 1 is electrically connected to the power supply terminal VCC. The second terminal of both the voltage divider module 1 and the first terminal of the detection module 2 are electrically connected to the processing module 3. The second terminal of the detection module 2 is grounded. The detection module 2 is placed in the card insertion area A to ensure it can detect liquid ingress in a timely manner, preventing liquid from flowing into the electronic device and damaging it. The voltage divider module 1 is placed in the non-card insertion area B to avoid short circuits caused by liquid ingress in the card insertion area A, which could lead to inaccurate electrical signals at the connection point M between the first terminals of the voltage divider module 1 and the first terminal of the detection module 2 detected by the processing module 3.

[0033] For example, when liquid enters the card slot A of an electronic device, the detection module 2 will be covered by the liquid, causing the resistance of the detection module 2 to decrease and the voltage drop of the detection module 2 to change. The electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2 will change, for example, from a high-level signal to a low-level signal. The processing module 3 can be, for example, a CPU (Central Processing Unit). The processing module 3 detects the change in the electrical signal at the connection point M, determines that liquid has entered the card slot A, and controls the disconnection of the power supply to the SIM card and / or the power supply to the SD card to avoid problems such as corrosion and burning of the card due to liquid entering the card slot A, and the inability of the electronic device to power on.

[0034] After the liquid ingress in the card slot A of the electronic device disappears, the detection module 2 is no longer covered by liquid, the resistance of the detection module 2 increases, the voltage drop of the detection module 2 changes, and the electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2 changes, for example, from a low level signal to a high level signal. Based on the change in the electrical signal at the connection point M, the processing module 3 determines that the liquid ingress in the card slot A has disappeared, and controls the conduction of the power supply for the SIM card and / or the power supply for the SD card, so that the SIM card and / or the SD card can work normally.

[0035] This embodiment of the disclosure places the detection module 2 in the card insertion area A to enable timely detection of liquid ingress in the card insertion area. The pressure divider module 1 is placed in the non-card insertion area B to prevent short circuits caused by water ingress in card insertion area A, which could lead to inaccurate electrical signals at the connection point M between the first end of the pressure divider module 1 and the first end of the detection module 2 in the processing module 3. Furthermore, the processing module 3 uses changes in the electrical signals at the connection point M between the first end of the pressure divider module 1 and the first end of the detection module 2 to determine if liquid has entered card insertion area A, and controls the disconnection of the power supply to the SIM card and / or the SD card, preventing corrosion and card burning due to liquid ingress in card insertion area A, and ensuring that electronic devices cannot be powered on.

[0036] Optionally, such as Figure 1As shown, the card insertion area A includes a card tray 5, a card holder 6, and a filling material 7. The card tray 5 and the card holder 6 are detachably connected. The card holder 6 is fixed to the main board of the electronic device. The filling material 7 fills the space between the card holder 6 and the non-card insertion area B. The detection module 2 is located between the filling material 7 and the card holder 6.

[0037] Specifically, such as Figure 1 As shown, the card insertion area A includes a card slot 6 and a card tray 5. A SIM card and / or an SD card can be installed in the card tray 5. The SIM card and / or SD card are detachably installed in the card slot 6 along with the card tray 5 to ensure that the electronic device can realize communication functions. The card slot 6 is fixed to the motherboard of the electronic device.

[0038] The card insertion area A also includes a filling material 7, which can be, for example, waterproof foam or other materials. This embodiment does not limit the specific materials used. The filling material 7 is applied during the assembly of the electronic device and is located between the structural housing 8 and the card holder 6 in the non-card insertion area B.

[0039] Card insertion area A also includes, for example, a waterproof sleeve 9 to prevent liquid from entering the electronic device. The waterproof sleeve 9 is detachably installed on the electronic device along with the card tray 5. Problems such as missing parts, improper assembly, or wear and aging of the waterproof sleeve 9 can lead to liquid entering around the card tray 5. In order for the detection module 2 to detect liquid entering the card insertion area A in a timely manner, the detection module 2 is placed between the filling material 7 and the card holder 6. Once liquid enters the card insertion area A, the voltage drop of the detection module 2 can change in a timely manner, thereby enabling the processing module 3 to disconnect the power supply of the SIM card and / or the power supply of the SD card in a timely manner.

[0040] In some embodiments, the detection module 2 may also be disposed between the card holder 6 and the card tray 5. The specific detection method can be referred to the above embodiments, and will not be described in detail here.

[0041] Optionally, combined Figure 1 and Figure 2 The non-card insertion area B includes the shielded area C, and the voltage divider module 1 is located within the shielded area C.

[0042] Specifically, in combination Figure 1 and Figure 2 In the non-card insertion area B, there is also a shielding area C, which is a shielding cover. The shielding cover is a tool used to shield electronic signals. Its function is to shield the influence of external electromagnetic waves on the internal circuit and the radiation of electromagnetic waves generated internally. The voltage divider module 1 is set in the shielding area C to avoid the influence of external electromagnetic waves on the voltage divider module 1.

[0043] Optionally, combined Figure 1 and Figure 2 The processing module 3 includes a general-purpose input / output interface, which is electrically connected to the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2.

[0044] Specifically, in combination Figure 1 and Figure 2 The processing module 3 includes a general-purpose input / output (GPIO) interface. When the GPIO interface 31 detects a change in the electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2, the processing module 3 can determine whether liquid has entered the card insertion area A, and then control the power supply of the SIM card and / or the power supply of the SD card.

[0045] When liquid enters the card slot A of the electronic device, the detection module 2 will be covered by the liquid, the resistance of the detection module 2 will decrease, the voltage of the detection module 2 will change, and the electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2 will change, for example, from a high level signal to a low level signal. The general-purpose input / output interface 31 of the processing module 3 detects the change in the electrical signal at the connection point M, the processing module 3 determines that liquid has entered the card slot A, and controls the power supply of the SIM card and / or the power supply of the SD card to be disconnected.

[0046] After the liquid ingress in the card slot A of the electronic device disappears, the detection module 2 is no longer covered by liquid, the resistance of the detection module 2 increases, the voltage divider of the detection module 2 changes, and the electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2 changes, for example, from a low level signal to a high level signal. The general-purpose input / output interface 31 of the processing module 3 detects the change in the electrical signal at the connection point M, and the processing module 3 determines that the liquid ingress in the card slot A has disappeared, and controls the power supply of the SIM card and / or the power supply of the SD card to be turned on.

[0047] Optionally, combined Figure 1 and Figure 2 The processing module 3 includes an analog-to-digital conversion interface 32, which is electrically connected to the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2.

[0048] Specifically, in combination Figure 1 and Figure 2 The processing module 3 may include, for example, an analog-to-digital converter (ADC) interface 32. The ADC interface 32 can accurately acquire the voltage value of the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2. The processing module 3 determines whether liquid has entered the card insertion area A by the voltage value of the connection point M, thereby improving the accuracy of liquid entry detection.

[0049] For example, the processing module can pre-store a first threshold and a second threshold. The first threshold is, for example, 0.2V, and the second threshold is, for example, 1.5V. When the voltage value of the electrical signal at the connection point M connected to the analog-to-digital converter interface 32 is less than the first threshold, it is determined that liquid has entered the card insertion area A, and the processing module 3 controls the disconnection of the power supply to the SIM card and / or the power supply to the SD card. When the voltage value of the electrical signal at the connection point M connected to the analog-to-digital converter interface 32 is greater than the second threshold, it is determined that liquid has not entered the card insertion area A, and the processing module 3 controls the conduction of the power supply to the SIM card and / or the power supply to the SD card.

[0050] It should be noted that the first threshold and the second threshold can be set according to the actual usage requirements of the liquid inlet detection circuit, and this embodiment does not limit this.

[0051] Optionally, combined Figure 1 and Figure 2 The voltage divider module 1 includes a first resistor R1, the first end of which is electrically connected to the power supply terminal VCC, and the second end of which is electrically connected to the first end of the detection module 2.

[0052] Specifically, in combination Figure 1 and Figure 2 The voltage divider module 1, for example, is a first resistor R1. Its simple structure allows it to achieve voltage division without requiring complex circuitry. The first end of the first resistor R1 is electrically connected to the power supply terminal VCC, and the second end of the first resistor R1 is electrically connected to the first end of the detection module 2. The first resistor R1 can be, for example, a surface-mount device. The specific working principle of the voltage divider module 1 can be understood from the above embodiments and will not be elaborated upon here.

[0053] Optionally, combined Figure 1 and Figure 2 The detection module 2 includes a second resistor R2. The first end of the second resistor R2 is electrically connected to the second end of the voltage divider module 1, and the second end of the second resistor R2 is grounded.

[0054] Specifically, in combination Figure 1 and Figure 2 The detection module 2 can be, for example, a second resistor R2. After liquid enters the card insertion area A, the resistance value of the second resistor R2 changes, and the voltage of the second resistor R2 changes. This causes the electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2 to change. The detection module 2 detects the change in the electrical signal at the connection point M, thereby controlling the on / off state of the power supply of the SIM card and / or the power supply of the SD card.

[0055] Optionally, combined Figure 1 and Figure 2The second resistor R2 includes a first pad 21 and a second pad 22; the first pad 21 serves as the first end of the second resistor R2, and the second pad 22 serves as the second end of the second resistor R2.

[0056] Specifically, in combination Figure 1 and Figure 2 The second resistor R2 may include, for example, a first pad 21 and a second pad 22. The first pad 21 serves as the first end of the second resistor R2 and is electrically connected to the second end of the voltage divider module 1. The second pad 22 serves as the second end of the second resistor R2 and is grounded.

[0057] When liquid enters the card slot A, the first solder pad 21 and the second solder pad 22 are connected by the liquid and grounded. This causes the processing module 3 to detect that the electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2 changes from a high level to a low level. The processing module 3 then controls the power supply of the SIM card and / or the power supply of the SD card to disconnect. When no liquid enters the card slot A, the first solder pad 21 and the second solder pad 22 are not connected by the liquid. The detection module 2 and the voltage divider module 1 divide the voltage normally. The processing module 3 detects that the electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2 is at a high level, and controls the power supply of the SIM card and / or the power supply of the SD card to be turned on.

[0058] Optionally, combined Figure 1 and Figure 2 The liquid ingress detection circuit also includes: a power management module 4 electrically connected to the processing module 3; the power management module 4 is electrically connected to the power supply of the SIM card, the power management module 4 receives the control signal issued by the processing module 3, and controls the on / off of the power supply of the SIM card based on the control signal; and / or, the power management module 4 is electrically connected to the power supply of the SD card, the power management module 4 receives the control signal issued by the processing module 3, and controls the on / off of the power supply of the SD card.

[0059] Specifically, in combination Figure 1 and Figure 2 The liquid ingress detection circuit also includes a power management module 4, which is electrically connected to the power supply of the processing module 3 and the SIM card, and / or the power management module 4 is electrically connected to the power supply of the processing module 3 and the SD card.

[0060] For example, the processing module 3 detects a change in the electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2, for example, from a high-level signal to a low-level signal, and determines that liquid has entered the card insertion area A. The processing module 3 sends, for example, a first control signal to the power management module 4. The power management module 4 receives the first control signal sent by the processing module 3 and controls the power supply of the SIM card and / or the power supply of the SD card to be disconnected.

[0061] For example, the processing module 3 detects a change in the electrical signal at the connection point M between the first end of the voltage divider module 1 and the first end of the detection module 2, for example, from a low-level signal to a high-level signal, and determines that no liquid has entered the card insertion area A. The processing module 3 then sends, for example, a second control signal to the power management module 4. The power management module 4 receives the second control signal sent by the processing module 3 and controls the power supply of the SIM card and / or the power supply of the SD card to be turned on.

[0062] This embodiment of the disclosure places the detection module in the card insertion area to enable timely detection of water ingress. The voltage divider module is placed in the non-card insertion area to prevent short circuits caused by water ingress in the card insertion area, which could lead to inaccurate electrical signals at the connection point between the first end of the voltage divider module and the first end of the detection module. Furthermore, the processing module uses changes in the electrical signal at the connection point between the first ends of the voltage divider module and the detection module to determine if liquid has entered the card insertion area. This allows for the control of disconnecting the power supply to the SIM card and / or SD card, preventing water ingress from corroding and burning the card, and preventing electronic devices from powering on.

[0063] This disclosure also provides an electronic device, which includes the liquid ingress detection circuit described in the above embodiments. Therefore, the electronic device provided in this disclosure has the beneficial effects described in the above embodiments. Furthermore, the electronic device described in this disclosure can be a computer, mobile phone, etc., and this disclosure does not specifically limit it to these devices.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0065] The above are merely specific embodiments of this disclosure, enabling those skilled in the art to understand or implement this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid inlet detection circuit, characterized in that, The invention relates to an electronic device, which includes a card insertion area and a non-card insertion area, wherein the non-card insertion area is located on at least one side of the card insertion area, and the card insertion area is used to insert a SIM card and / or an SD card. The liquid inlet detection circuit includes: a pressure divider module, a detection module, and a processing module; The first terminal of the voltage divider module is electrically connected to the power supply terminal, and the second terminal of the voltage divider module and the first terminal of the detection module are both electrically connected to the processing module. The second terminal of the detection module is grounded. The processing module controls the on / off state of the power supply of the SIM card and / or the power supply of the SD card based on the electrical signal at the connection point of the first end of the voltage divider module and the first end of the detection module. The voltage divider module is located in the non-card insertion area, and the detection module is located in the card insertion area.

2. The liquid inlet detection circuit according to claim 1, characterized in that, The card insertion area includes a card tray, a card holder, and a filling material. The card tray and the card holder are detachably connected. The card holder is fixed to the main board of the electronic device. The filling material fills the space between the card holder and the non-card insertion area. The detection module is located between the filling material and the card holder.

3. The liquid inlet detection circuit according to claim 1, characterized in that, The non-card insertion area includes a shielded area, and the voltage divider module is located within the shielded area.

4. The liquid inlet detection circuit according to claim 1, characterized in that, The processing module includes a general-purpose input / output interface, which is electrically connected to the connection point of the first end of the voltage divider module and the first end of the detection module.

5. The liquid inlet detection circuit according to claim 1, characterized in that, The processing module includes an analog-to-digital conversion interface, which is electrically connected to the connection point of the first end of the voltage divider module and the first end of the detection module.

6. The liquid inlet detection circuit according to claim 1, characterized in that, The voltage divider module includes a first resistor, a first end of which is electrically connected to a power supply terminal, and a second end of which is electrically connected to a first end of the detection module.

7. The liquid inlet detection circuit according to claim 1, characterized in that, The detection module includes a second resistor, the first end of which is electrically connected to the second end of the voltage divider module, and the second end of which is grounded.

8. The liquid inlet detection circuit according to claim 7, characterized in that, The second resistor includes a first pad and a second pad; the first pad serves as the first end of the second resistor, and the second pad serves as the second end of the second resistor.

9. The liquid inlet detection circuit according to claim 1, characterized in that, Also includes: A power management module electrically connected to the processing module; The power management module is electrically connected to the power supply of the SIM card, and the power management module receives the control signal sent by the processing module to control the on / off state of the power supply of the SIM card. And / or, the power management module is electrically connected to the power supply of the SD card, and the power management module receives the control signal issued by the processing module to control the on / off state of the power supply of the SD card.

10. An electronic device, characterized in that, Includes the liquid inlet detection circuit as described in any one of claims 1-9.

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