A mobile terminal

Abstract

An embodiment of the present invention provides a mobile terminal, including a positive charging terminal, a negative charging terminal, a charging load and a control circuit, wherein the positive charging terminal is connected to the control circuit and the positive electrode of the charging load, the negative charging terminal is connected to the control circuit, and the control circuit is connected to the negative electrode of the charging load. The control circuit is used to control the on-off of the path between the negative charging terminal and the negative electrode of the charging load based on the voltage of the positive charging terminal. By adding a control circuit, the on-off of the path between the negative charging terminal and the negative electrode of the charging load is controlled based on the voltage of the positive charging terminal, thereby improving the safety of the mobile terminal when charging.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and in particular to a mobile terminal. Background Art

[0002] During the charging process of the charging device, the charging device and the charged device need to exchange information necessary for safe charging. For some mobile terminals with circuit contacts, they can be connected to external charging devices for charging. Some interface circuits of the mobile terminal (such as magnetic suction interface) are in the form of contact spring connection. If they are accidentally vibrated, squeezed, dropped during charging, or there is a certain degree of side slip during normal plug-in and unplug operations, the adjacent contact signals may be misaligned at a certain moment, resulting in false contact, which may cause unexpected electrical damage to the device.

[0003] In the current contact spring connection products, in order to take into account the product appearance and size and its ease of use, some products usually cannot effectively limit the connection structure, and there is a possibility of misaligned connection during normal use. At the same time, with the wear and tear of daily use and other reasons, the misaligned connection caused by the failure of the limit is aggravated, and it is impossible to effectively protect the equipment.

[0004] Therefore, how to improve the charging safety of mobile terminals is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] The embodiment of the present application provides a mobile terminal, which is used to solve the problem in the prior art that the mobile terminal is unsafe when connected to a charging device for charging.

[0006] An embodiment of the present invention provides a mobile terminal, comprising: a positive charging terminal, a negative charging terminal, a charging load and a control circuit, wherein:

[0007] The positive charging terminal is connected to the control circuit and the positive electrode of the charging load;

[0008] The negative charging terminal is connected to the control circuit;

[0009] The control circuit is connected to the negative electrode of the charging load;

[0010] The control circuit is used to control the on / off of the path between the negative charging terminal and the negative electrode of the charging load based on the voltage of the positive charging terminal.

[0011] In a possible implementation, the voltage of the positive charging terminal is 0;

[0012] The control circuit is specifically used to control the disconnection of the path between the negative charging terminal and the negative electrode of the charging load.

[0013] In a possible implementation, the voltage of the positive charging terminal is within a preset voltage range;

[0014] The control circuit is specifically used to control the conduction of the path between the negative charging terminal and the negative electrode of the charging load.

[0015] In a possible implementation, it further includes a data transmission end connected to the signal end of the charging device, and is used for data transmission through the signal end.

[0016] In a possible implementation, the control circuit includes a control unit and a switch unit;

[0017] The first end of the control unit is connected to the positive charging end and the positive electrode of the charging load, and the second end of the control unit is connected to the control end of the switch unit, and is used to provide a switch signal to the control end of the switch unit based on the voltage of the positive charging end;

[0018] The first end of the switch unit is connected to the negative charging end, and the second end of the switch unit is connected to the negative electrode of the charging load, and is used to control the on-off of the path between the negative charging end and the negative electrode of the charging load according to the switching signal.

[0019] In a possible implementation, the control unit includes: a first resistor;

[0020] A first end of the first resistor is connected to the positive charging end and the positive electrode of the charging load, and a second end of the first resistor is connected to the control end of the switch unit.

[0021] In a possible implementation, the control unit further includes a second resistor;

[0022] The first end of the second resistor is connected to the second end of the first resistor, and the second end of the second resistor is connected to the second end of the switch unit.

[0023] In a possible implementation, the switch unit includes a transistor;

[0024] The control stage of the transistor serves as the control end of the switch unit, the first stage of the transistor serves as the first end of the switch unit, and the second stage of the transistor serves as the second end of the switch unit.

[0025] In a possible implementation, the control circuit further includes a capacitor;

[0026] The first end of the capacitor is connected to the positive charging end, and the second end of the capacitor is connected to the control end of the switch unit.

[0027] In a possible implementation, the control circuit further includes: a third resistor;

[0028] A first end of the third resistor is connected to a first end of the switch unit, and a second end of the third resistor is connected to a second end of the switch unit.

[0029] The mobile terminal provided by the embodiment of the present invention includes a positive charging terminal, a negative charging terminal, a charging load and a control circuit, wherein the positive charging terminal is connected to the control circuit and the positive electrode of the charging load, the negative charging terminal is connected to the control circuit, and the control circuit is connected to the negative electrode of the charging load. The control circuit is used to control the on-off of the path between the negative charging terminal and the negative electrode of the charging load based on the voltage of the positive charging terminal. By adding a control circuit, the on-off of the path between the negative charging terminal and the negative electrode of the charging load is controlled based on the voltage of the positive charging terminal, thereby improving the safety of the mobile terminal when charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic diagram of normal charging of a mobile terminal in the related art provided by an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of abnormal charging of a mobile terminal in the related art provided by an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of a mobile terminal provided by an embodiment of the present invention;

[0034] Figure 4 A schematic diagram of normal charging of a mobile terminal provided by an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of abnormal charging of a mobile terminal provided by an embodiment of the present invention;

[0036] Figure 6 A schematic diagram of another mobile terminal provided by an embodiment of the present invention;

[0037] Figure 7 A schematic diagram of another mobile terminal provided by an embodiment of the present invention;

[0038] Figure 8 A schematic diagram of another mobile terminal provided by an embodiment of the present invention;

[0039] Fig. 9 A schematic diagram of another mobile terminal provided by an embodiment of the present invention;

[0040] Fig.10 A schematic diagram of another mobile terminal provided by an embodiment of the present invention;

[0041] Fig.11 A schematic diagram of another mobile terminal provided by an embodiment of the present invention;

[0042] Fig.12 A schematic diagram of another mobile terminal provided by an embodiment of the present invention;

[0043] Fig.13 A schematic diagram of another mobile terminal provided by an embodiment of the present invention;

[0044] Fig.14 A schematic diagram of another mobile terminal provided by an embodiment of the present invention;

[0045] Fig.15 A schematic diagram of another mobile terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0047] Most mobile terminals have built-in charging loads, such as batteries. Some of the charging interface circuits of some mobile terminals are in the form of contact spring connection (such as magnetic suction interface). These interface circuits are not safe during charging. They may be accidentally vibrated, squeezed, dropped, or misaligned at a certain moment during normal plugging and unplugging operations, resulting in accidental contact, which may cause unexpected electrical damage to the device.

[0048] The main method at present is to add a limiter to the structure to avoid misaligned connection on the interface, but this method has large accessories and cannot provide further protection for the device when the limiter fails. At the same time, due to wear and tear during daily use, the limiter failure is aggravated and misaligned connection occurs. In some contact spring connection products, in order to take into account the product appearance and size and its convenience of use, some products usually cannot effectively limit the connection structure. There is a possibility of misaligned connection during normal use, which cannot effectively protect the device.

[0049] For the above-mentioned device that is charged through the contact spring connection interface circuit, Figure 1As shown, the mobile terminal includes a positive charging terminal, a negative charging terminal and a data transmission terminal, and the charging device includes a positive output terminal and a negative output terminal of electric energy, and a signal terminal. When the mobile terminal is charged, under normal circumstances, the positive charging terminal of the mobile terminal is connected to the positive output terminal of the charging device, and the negative charging terminal of the mobile terminal is connected to the negative output terminal of the charging device to form a charging circuit. The data transmission terminal of the mobile terminal is connected to the signal terminal of the charging device for data transmission. In this way, corresponding connections of corresponding ports can ensure that the mobile terminal is charged normally, wherein the data transmission terminal of the mobile terminal is connected to the signal terminal of the charging device for data transmission and corresponding signal sending and receiving. Specifically, when the charging device is connected to a computer, the data transmission terminal of the mobile terminal can transmit data with the computer through the signal terminal of the charging device.

[0050] In the embodiment of the present invention, the mobile terminal and the charging device are both non-co-located systems.

[0051] When a user accidentally inserts a mobile terminal into the wrong port of a charging device, causing it to be misaligned, or when it is accidentally vibrated, squeezed, dropped, or plugged and unplugged under normal circumstances, adjacent contact signals may be misaligned at a certain moment, resulting in accidental contact, which may cause unexpected electrical damage to the device.

[0052] like Figure 2 As shown, it is a schematic diagram of the staggered connection between the mobile terminal and the charging device. Figure 2 It can be seen that the positive charging terminal of the mobile terminal is suspended, the negative charging terminal of the mobile terminal is connected to the positive output terminal of the charging device, and the data transmission terminal of the mobile terminal is connected to the negative output terminal of the charging device. Because the charging device and the mobile terminal are not common ground systems, the voltage of the data transmission terminal of the mobile terminal is approximately the reverse voltage of the positive output terminal of the charging device. The chip system is generally designed to withstand a pressure of -0.3V, and the voltage of the positive output terminal of the charging device must be more than 0.3V (generally more than 5V), so the voltage on the data transmission terminal of the mobile terminal will be around -5V or even lower, far exceeding the limit that the chip can withstand (-0.3V), so it is easy to cause damage to the chip connected to the data transmission terminal of the mobile terminal.

[0053] Based on the above problems, an embodiment of the present invention provides a mobile terminal 10, such as Figure 3 As shown, it includes: a positive charging terminal, a negative charging terminal, a control circuit 101 and a charging load 102, wherein:

[0054] The positive charging terminal is connected to the positive electrode of the control circuit 101 and the charging load 102;

[0055] The negative charging terminal is connected to the control circuit 101;

[0056] The control circuit 101 is connected to the negative electrode of the charging load 102;

[0057] The control circuit 101 is used to control the on / off of the path between the negative charging terminal and the negative electrode of the charging load based on the voltage of the positive charging terminal.

[0058] The mobile terminal provided by the embodiment of the present invention includes a positive charging terminal, a negative charging terminal, a charging load and a control circuit, wherein the positive charging terminal is connected to the control circuit and the positive electrode of the charging load, the negative charging terminal is connected to the control circuit, and the control circuit is connected to the negative electrode of the charging load. The control circuit is used to control the on-off of the path between the negative charging terminal and the negative electrode of the charging load based on the voltage of the positive charging terminal. By adding a control circuit, the on-off of the path between the negative charging terminal and the negative electrode of the charging load is controlled based on the voltage of the positive charging terminal, thereby improving the safety of the mobile terminal when charging.

[0059] The embodiment of the present invention uses a hardware circuit to protect the mobile terminal, and the circuit is simple, reliable and highly practical.

[0060] Specifically, when the mobile terminal 10 provided by the embodiment of the present invention is normally connected to the charging device, such as Figure 4 As shown, the positive charging terminal, negative charging terminal, and data transmission terminal of the mobile terminal are connected to the positive output terminal, negative output terminal, and signal terminal of the charging device in a one-to-one correspondence. At this time, the charging device provides power to the positive charging terminal of the mobile terminal through the positive output terminal, that is, the voltage of the positive charging terminal of the mobile terminal is within a preset voltage range, that is, a preset normal working voltage, and the control circuit 101 is specifically used to control the conduction of the path between the negative charging terminal and the negative electrode of the charging load, so that the mobile terminal 10 is charged normally.

[0061] In implementation, the charging device may include a signal terminal or may not include a signal terminal. If the charging device includes a signal terminal, the data transmission terminal of the mobile terminal 10 can be connected to the signal terminal of the charging device. When the charging device charges the mobile terminal, data transmission can be performed through the signal terminal of the charging device.

[0062] In the above embodiments, the main application scenario is that when the charging device is connected to the computer, the mobile terminal 10 performs data transmission, which is actually performed through the signal end of the charging device and the computer, and the signal end of the charging device acts as a relay.

[0063] In some embodiments, if the mobile terminal 10 provided by the embodiment of the present invention is misaligned when connected to a charging device for charging, such as Figure 5 As shown, at this time, the positive charging terminal of the mobile terminal 10 is suspended, that is, the voltage is 0. At this time, the control circuit 101 is specifically used to control the path between the negative charging terminal and the negative electrode of the charging load 102 to be disconnected. Figure 5It can be seen that when misalignment occurs, the positive charging terminal of the mobile terminal 10 is not connected to any end of the charging device. At this time, the positive charging terminal pin of the mobile terminal 10 is in a suspended state, without voltage, that is, the voltage is 0. At this time, if the path between the negative charging terminal of the mobile terminal 10 and the negative electrode of the charging load 102 is connected, the mobile terminal 10 may be damaged. Therefore, the control circuit 101 controls the path between the negative charging terminal and the negative electrode of the charging load 102 to disconnect according to the state that the positive charging terminal voltage is 0, so that the charging circuit is disconnected, and the mobile terminal 10 stops charging. At this time, the data transmission end of the mobile terminal 10 will not form an effective negative pressure, thereby protecting the devices on the data transmission end of the mobile terminal 10 from damage, thereby improving the safety of charging.

[0064] It should be noted that, in the embodiment of the present invention, one end of the mobile terminal connected to the negative output end of the charging device can be the data transmission end of the mobile terminal, or other ends of the mobile terminal. As long as it is an end connected to the negative output end of the charging device, it can be an end of the mobile terminal that may be damaged due to the voltage of the negative output end. The embodiment of the present invention does not limit this.

[0065] In some embodiments, the control circuit 101 may include a control unit 1011 and a switch unit 1012. Figure 6 shown.

[0066] The first end of the control unit 1011 is connected to the positive charging end and the positive pole of the charging load 102, and the second end of the control unit 1011 is connected to the control end of the switch unit 1012, and is used to provide a switching signal to the control end of the switch unit 1012 based on the voltage of the positive charging end, wherein when the voltage of the positive charging end is 0, a shutdown signal is provided to the control end of the switch unit 1012, and when the voltage of the positive charging end is within a preset voltage range, a conduction signal is provided to the control end of the switch unit 1012.

[0067] The first end of the switch unit 1012 is connected to the negative charging end, and the second end of the switch unit 1012 is connected to the negative electrode of the charging load 102, and is used to control the on and off of the path between the negative charging end and the negative electrode of the charging load according to the switch signal. When the switch signal is a closed signal, the path between the charging end and the negative electrode of the charging load is closed; when the switch signal is a conducting signal, the path between the charging end and the negative electrode of the charging load is conducted.

[0068] In some optional embodiments, the control unit 1011 may include: a first resistor R1, such as Figure 7 shown.

[0069] A first end of the first resistor R1 is connected to the positive charging end and the positive electrode of the charging load 102 , and a second end of the first resistor R1 is connected to the control end of the switch unit 1012 .

[0070] In some optional embodiments, the control unit 1011 further includes a second resistor R2, such as Figure 8 shown.

[0071] A first end of the second resistor R2 is connected to the second end of the first resistor R1 , and a second end of the second resistor R2 is connected to the second end of the switch unit 1012 .

[0072] Among them, a suitable start-up voltage can be selected by adjusting the values ​​of R1 and R2, so as to speed up the turn-off time of the switch unit 1012 and improve the efficiency of the circuit operation.

[0073] In some optional embodiments, the switch unit 1012 may include a transistor Q, such as Fig. 9 shown.

[0074] The control stage of the transistor Q serves as the control end of the switch unit 1012 , the first stage of the transistor Q serves as the first end of the switch unit 1012 , and the second stage of the transistor Q serves as the second end of the switch unit 1012 .

[0075] In some optional embodiments, the control circuit 101 further includes a capacitor C, such as Figures 10 to 12 As shown;

[0076] A first terminal of the capacitor C is connected to the positive charging terminal, and a second terminal of the capacitor C is connected to the control terminal of the switch unit 1012 .

[0077] By increasing the capacitor C, the discharge speed of the transistor Q in the switch unit 1012 can be increased, thereby improving the working efficiency of the control circuit 101.

[0078] In some optional embodiments, the control circuit 101 may further include: a third resistor R3, such as Figures 13 to 15 shown.

[0079] A first end of the third resistor R3 is connected to a first end of the switch unit 1012 , and a second end of the third resistor R3 is connected to a second end of the switch unit 1012 .

[0080] The resistor R3 is added to meet the triggering requirements of other devices, such as the ID (Identity Document) recognition requirement of OTG (On The Go).

[0081] The mobile terminal provided by the embodiment of the present invention includes a positive charging terminal, a negative charging terminal, a charging load and a control circuit, wherein the positive charging terminal is connected to the control circuit and the positive electrode of the charging load, the negative charging terminal is connected to the control circuit, and the control circuit is connected to the negative electrode of the charging load. The control circuit is used to control the on-off of the path between the negative charging terminal and the negative electrode of the charging load based on the voltage of the positive charging terminal. By adding a control circuit, the on-off of the path between the negative charging terminal and the negative electrode of the charging load is controlled based on the voltage of the positive charging terminal, which fully utilizes the failure principle of the side sliding dislocation of the mobile terminal, and purely realizes protection from the hardware circuit. The circuit of the mobile terminal is simple, reliable, and highly practical, which can improve the safety of the mobile terminal when charging.

[0082] Those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A mobile terminal, characterized in that: include: Positive charging terminal, negative charging terminal, charging load, control circuit and data transmission terminal, among which, The positive charging terminal is connected to the control circuit and the positive electrode of the charging load; The negative charging terminal is connected to the control circuit; The control circuit is connected to the negative electrode of the charging load; The data transmission end is connected to the signal end of the charging device; The data transmission end is used to perform data transmission via the signal end; The control circuit is used to control the on / off of the path between the negative charging terminal and the negative electrode of the charging load based on the voltage of the positive charging terminal; Wherein, when the mobile terminal is misaligned during charging with the charging device, the positive charging terminal of the mobile terminal is suspended, the positive output terminal of the charging device is electrically connected to the negative charging terminal of the mobile terminal, and the negative output terminal of the charging device is electrically connected to the data transmission terminal of the mobile terminal, and the control circuit is specifically used to control the path between the negative charging terminal and the negative electrode of the charging load to be disconnected; The control circuit includes a control unit and a switch unit; The first end of the control unit is connected to the positive charging end and the positive electrode of the charging load, and the second end of the control unit is connected to the control end of the switch unit, and is used to provide a switch signal to the control end of the switch unit based on the voltage of the positive charging end; The first end of the switch unit is connected to the negative charging end, and the second end of the switch unit is connected to the negative electrode of the charging load, and is used to control the on-off of the path between the negative charging end and the negative electrode of the charging load according to the switch signal; The control circuit further includes: a third resistor; The first end of the third resistor is connected to the first end of the switch unit, and the second end of the third resistor is connected to the second end of the switch unit; The control circuit also includes a capacitor; The first end of the capacitor is connected to the positive charging end, and the second end of the capacitor is connected to the control end of the switch unit.

2. The mobile terminal according to claim 1, characterized in that: The voltage of the positive charging terminal is within a preset voltage range; The control circuit is specifically used to control the conduction of the path between the negative charging terminal and the negative electrode of the charging load.

3. The mobile terminal according to claim 1, characterized in that: The control unit comprises: a first resistor; The first end of the first resistor is connected to the positive charging end and the positive electrode of the charging load, and the second end of the first resistor is connected to the control end of the switch unit.

4. The mobile terminal according to claim 3, characterized in that: The control unit also includes a second resistor; The first end of the second resistor is connected to the second end of the first resistor, and the second end of the second resistor is connected to the second end of the switch unit.

5. The mobile terminal according to claim 1, characterized in that: The switch unit includes a transistor; The control stage of the transistor serves as the control end of the switch unit, the first stage of the transistor serves as the first end of the switch unit, and the second stage of the transistor serves as the second end of the switch unit.

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