CN215772591U - Interface control circuit and intelligent terminal equipment - Google Patents

Abstract

The utility model discloses an interface control circuit and intelligent terminal equipment, wherein the interface control circuit comprises a Hall detection unit, a signal conversion unit and a switch unit; the internal power supply of the intelligent terminal equipment is electrically connected with the external power supply through the switch unit, the external power supply comprises a charging base provided with a magnet, and the internal power supply of the intelligent terminal equipment is connected with the external power supply through the charging base for charging; the switch unit is electrically connected with the Hall detection unit through the signal conversion unit, the Hall detection unit controls the switch unit to be disconnected when not detecting the magnetic field of the charging base, and the signal conversion unit converts the electric signal output by the Hall detection unit into a switch signal and transmits the switch signal to the switch unit. The application solves the technical problems that contacts are easy to corrode and poor in conductivity and the service life of charging contacts is shortened due to long-term electrification of metal contacts in the prior art, the service life of the metal contacts is prolonged, the conductivity of the metal contacts is improved, and the charging efficiency is improved.

Description

Interface control circuit and intelligent terminal equipment

Technical Field

The embodiment of the utility model relates to the technical field of charging control, in particular to an interface control circuit and intelligent terminal equipment.

Background

At present, in the field of mobile terminals, as users increasingly need functions and types of electronic products, the requirements on charging modes are more and more diversified, the required battery capacity is also more and more large, the requirements on charging power and efficiency are higher and more, and meanwhile, the requirements on charging safety are also higher and more. In order to meet the requirements, a mode of charging by using a metal contact type, namely, a charger is used as a base, and charging equipment is charged by connecting the metal contact with the base, appears in the industry. The charging mode is applied more and more in the field of industrial intelligent equipment and the field of intelligent wearing products.

However, when the intelligent terminal device is charged in a metal contact mode, part of the metal contacts are electrified for a long time and exposed in the air, so that the metal contacts are polluted by external water vapor, sweat, stains and the like for a long time, electrochemical corrosion reaction can occur, the metal charging contacts are corroded, the conductivity is influenced, heating, poor contact and the like caused by impedance change of a charging circuit are caused, and the service life of the charging contacts is greatly shortened.

SUMMERY OF THE UTILITY MODEL

The utility model provides an interface control circuit and intelligent terminal equipment, which solve the technical problems that a contact is easy to corrode and poor in conductivity and the service life of a charging contact is shortened due to long-term electrification of a metal contact in the prior art.

The embodiment of the utility model provides an interface control circuit, which is arranged in intelligent terminal equipment and comprises a Hall detection unit, a signal conversion unit and a switch unit;

the internal power supply of the intelligent terminal equipment is electrically connected with an external power supply through the switch unit, the external power supply comprises a charging base provided with a magnet, and the internal power supply of the intelligent terminal equipment is connected with the external power supply through the charging base for charging;

the switch unit is electrically connected with the Hall detection unit through the signal conversion unit, the Hall detection unit controls the switch unit to be switched off when the Hall detection unit does not detect the magnetic field of the charging base, and the signal conversion unit converts the electric signal output by the Hall detection unit into a switch signal and transmits the switch signal to the switch unit.

Further, the hall detection unit comprises a hall chip, a first resistor and a first capacitor;

the power supply end of the Hall chip is electrically connected with a first power supply, the grounding end of the Hall chip is grounded, and the output end of the Hall chip is electrically connected with the signal conversion unit;

the first end of the first resistor is electrically connected with a power supply end of the Hall chip, and the second end of the first resistor is electrically connected with an output end of the Hall chip;

the first end of the first capacitor is electrically connected with a power supply end of the Hall chip, and the second end of the first capacitor is grounded.

Further, the switch unit comprises a first switch tube, a second switch tube and a second resistor;

the control end of the first switch tube and the control end of the second switch tube are both electrically connected with the signal conversion unit, the first end of the first switch tube is electrically connected with the power end of the external power supply, and the second end of the first switch tube is electrically connected with the first end of the second switch tube;

a second end of the second switch tube is electrically connected with a power supply end of the internal power supply of the intelligent terminal device;

the first end of the second resistor is electrically connected with the control end of the first switch tube and the control end of the second switch tube respectively, and the second end of the second resistor is electrically connected with the second end of the first switch tube and the first end of the second switch tube respectively.

Furthermore, the first switch tube and the second switch tube are both PMOS tubes, the control end, the first end and the second end of the first switch tube are respectively a gate, a drain and a source of the PMOS tube, and the control end, the first end and the second end of the second switch tube are respectively a gate, a source and a drain of the PMOS tube.

Further, the signal conversion unit includes a first triode, a third resistor, a fourth resistor and a fifth resistor;

the base electrode of the first triode is electrically connected with the first end of the third resistor, the emitting electrode of the first triode is grounded, and the collecting electrode of the first triode is electrically connected with the first end of the fourth resistor;

the second end of the third resistor is electrically connected with the Hall detection unit; a second end of the fourth resistor is electrically connected with the switch unit; the first end of the fifth resistor is electrically connected with the base electrode of the first triode, and the second end of the fifth resistor is grounded.

Further, the signal conversion unit further comprises an inverter and a sixth resistor; the switch unit further comprises a USB switch chip and a second capacitor;

the first end of the phase inverter is electrically connected with the first end of the sixth resistor, and the second end of the phase inverter is electrically connected with the control end of the USB switch chip; the second end of the sixth resistor is electrically connected with the Hall detection unit;

the positive input end of the USB switch chip is electrically connected with the positive data end of an external USB interface, the negative input end of the USB switch chip is electrically connected with the negative data end of the external USB interface, the power end of the USB switch chip is electrically connected with a second power supply, the grounding end of the USB switch chip is grounded, the enabling end of the USB switch chip is electrically connected with the first end of the second capacitor, the second end of the second capacitor is grounded, the positive output end of the USB switch chip is electrically connected with the positive data end of the internal USB port of the intelligent terminal device, and the negative output end of the USB switch chip is electrically connected with the negative data end of the internal USB port of the intelligent terminal device.

The embodiment of the utility model also provides intelligent terminal equipment, which comprises the interface control circuit of any one of the embodiments, and the intelligent terminal equipment further comprises a plurality of metal charging contacts and a plurality of grounding contacts;

when the metal charging contact is in contact with the grounding contact and the corresponding charging contact of the charging base provided with the magnet, the intelligent terminal equipment is charged.

Furthermore, the intelligent terminal device also comprises a USB interface;

the plurality of metal charging contacts and the plurality of grounding contacts are respectively arranged at two ends of the USB interface.

Further, the intelligent terminal device further comprises a label;

the metal charging contacts and the grounding contacts are arranged on two sides of the label respectively.

Furthermore, a plurality of the metal charging contacts and a plurality of the grounding contacts are arranged on the same side of the label, and the metal charging contacts and the grounding contacts are separated by a preset distance.

The utility model discloses an interface control circuit and intelligent terminal equipment, wherein the interface control circuit is arranged in the intelligent terminal equipment and comprises a Hall detection unit, a signal conversion unit and a switch unit; the internal power supply of the intelligent terminal equipment is electrically connected with the external power supply through the switch unit, the external power supply comprises a charging base provided with a magnet, and the internal power supply of the intelligent terminal equipment is connected with the external power supply through the charging base for charging; the switch unit is electrically connected with the Hall detection unit through the signal conversion unit, the Hall detection unit controls the switch unit to be disconnected when not detecting the magnetic field of the charging base, and the signal conversion unit converts the electric signal output by the Hall detection unit into a switch signal and transmits the switch signal to the switch unit. This application is through setting up interface control circuit and not being connected with external power source at intelligent terminal equipment and breaking off internal power source and the contact that charges when charging, solved among the prior art contact point easy corrosion, the poor and life's that shortens the contact that charges technical problem that conductive property leads to for a long time electrified, realized the life of extension metal contact, improve the conductivity of metal contact and promote the technological effect of charge efficiency.

Drawings

Fig. 1 is a structural diagram of an interface control circuit according to an embodiment of the present invention;

FIG. 2 is a circuit diagram of an interface control circuit according to an embodiment of the present invention;

FIG. 3 is a circuit diagram of another interface control circuit according to an embodiment of the present invention;

fig. 4 is a structural diagram of an intelligent terminal device provided in an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating an arrangement of a metal charging contact and a ground contact of an intelligent terminal device according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating an arrangement of metal charging contacts and grounding contacts of another intelligent terminal device according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating an arrangement of a metal charging contact and a ground contact of another intelligent terminal device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not used for limiting a specific order. The following embodiments of the present invention may be implemented individually, or in combination with each other, and the embodiments of the present invention are not limited in this respect.

Fig. 1 is a structural diagram of an interface control circuit according to an embodiment of the present invention.

As shown in fig. 1, an interface control circuit 100 is disposed in an intelligent terminal device 10, and the interface control circuit 100 includes a hall detection unit 101, a signal conversion unit 102, and a switch unit 103; the internal power supply 200 of the intelligent terminal device 10 is electrically connected with the external power supply 20 through the switch unit 103, the external power supply 20 comprises a charging base 202 provided with a magnet 201, and the internal power supply 200 of the intelligent terminal device 10 is connected with the external power supply 20 through the charging base 202 for charging; the switch unit 103 is electrically connected to the hall detection unit 101 through the signal conversion unit 102, the hall detection unit 101 controls the switch unit 103 to be turned off when the hall detection unit 101 does not detect the magnetic field of the charging base 202, and the signal conversion unit 102 converts the electric signal output by the hall detection unit 101 into a switching signal and transmits the switching signal to the switch unit 103.

Specifically, the intelligent terminal device 10 is provided with a metal contact as an interface of the charging circuit, when the intelligent terminal device 10 charges by using the charging base 202 with the magnet 201, the intelligent terminal device 10 is close to the charging base 202, the metal contact provided on the intelligent terminal device 10 is connected with a corresponding contact on the charging base 202, and the intelligent terminal device 10 starts a charging action. At this time, the hall detection unit 101 in the interface control circuit 100 can detect the magnetic field of the magnet 201, and output an electrical signal to the signal conversion unit 102 after detecting the magnetic field, for example, output an electrical signal at a low level, the signal conversion unit 102 converts the electrical signal at the low level into a corresponding switching signal, and transmits the switching signal to the switching unit 103, the switching unit 103 is closed based on the received switching signal, so that the metal contact of the intelligent terminal device 10 is communicated with the internal power supply 200 in the intelligent terminal device 10, and the intelligent terminal device 10 starts to be charged.

When the intelligent terminal device 10 is not connected to the charging apparatus, i.e., the metal contact of the intelligent terminal device 10 is not connected to the trusted contact of the charging base 202, the hall detection unit 101 does not recognize the magnetic field, the hall detection unit 101 outputs an electrical signal, for example, an electrical signal of a high level, to the signal conversion unit 102, the signal conversion unit 102 converts the electrical signal of the high level into a corresponding switching signal, and transmits the switching signal to the switching unit 103, the switching unit 103 is turned off based on the received switching signal, so that the metal contact of the intelligent terminal device 10 is disconnected from the internal power supply 200 in the intelligent terminal device 10, the effect that the metal contact is not electrified when the intelligent terminal device 10 is not charged is achieved, the metal contact is in a low level state, one of the conditions of electrochemical reaction is fundamentally blocked, and a good anti-corrosion effect is achieved.

It should be noted that, in addition to using the magnet 201 to radiate the magnetic field, other devices capable of radiating the magnetic field, such as an electrified coil, may be used in the charging base 202 instead of the magnet 201, and are not described herein again.

This application is through setting up interface control circuit and not being connected with external power source at intelligent terminal equipment and breaking off internal power source and the contact that charges when charging, solved among the prior art contact point easy corrosion, the poor and life's that shortens the contact that charges technical problem that conductive property leads to for a long time electrified, realized the life of extension metal contact, improve the conductivity of metal contact and promote the technological effect of charge efficiency.

Fig. 2 is a circuit diagram of an interface control circuit according to an embodiment of the present invention.

Optionally, as shown in fig. 2, the HALL detection unit 101 includes a HALL chip HALL-IC, a first resistor R1, and a first capacitor C1; a power supply end VDD of the Hall chip HALL-IC is electrically connected with a first power supply VCC1, a grounding end GND of the Hall chip HALL-IC is grounded, and an output end OUT of the Hall chip HALL-IC is electrically connected with the signal conversion unit 102; the first end of the first resistor R1 is electrically connected with the power supply end VDD of the Hall chip HALL-IC, and the second end of the first resistor R1 is electrically connected with the output end OUT of the Hall chip HALL-IC; the first end of the first capacitor C1 is electrically connected with the power supply terminal VDD of the Hall chip HALL-IC, and the second end of the first capacitor C1 is grounded.

Specifically, referring to fig. 2, when the HALL chip HALL-IC detects the magnetic field of the magnet 201 in the charging base 202, the output terminal OUT of the HALL chip HALL-IC outputs a low-level electrical signal to the signal conversion unit 102; when the HALL chip HALL-IC does not detect a magnetic field, the output is in a high resistance state, and a high level electrical signal is output through an external pull-up resistor, i.e., the first resistor R1. The decoupling of the effect of the first capacitance C1 provides a more stable power supply for the HALL chip HALL-IC.

Optionally, as shown in fig. 2, the switching unit 103 includes a first switching tube Q1, a second switching tube Q2, and a second resistor R2.

The control end 1 of the first switch tube Q1 and the control end 1 of the second switch tube Q2 are both electrically connected to the signal conversion unit 102, the first end 2 of the first switch tube Q1 is electrically connected to the power supply terminal VCC2 of the external power supply 20, and the second end 3 of the first switch tube Q1 is electrically connected to the first end 2 of the second switch tube Q2; the second end 3 of the Q2 of the second switch tube is electrically connected with the power supply terminal VCC3 of the internal power supply 200 of the intelligent terminal device 10, and the ground terminal GND of the internal power supply 200 of the intelligent terminal device 10 is grounded; a first end of the second resistor R2 is electrically connected to the control terminal 1 of the first switch transistor Q1 and the control terminal 1 of the second switch transistor Q2, respectively, and a second end of the second resistor R2 is electrically connected to the second end 3 of the first switch transistor Q1 and the first end 2 of the second switch transistor Q2, respectively.

Optionally, as shown in fig. 2, the first switch tube Q1 and the second switch tube Q2 are both PMOS tubes, the control terminal 1, the first terminal 2, and the second terminal 3 of the first switch tube Q1 are respectively a gate, a drain, and a source of the PMOS tube, and the control terminal 1, the first terminal 2, and the second terminal 3 of the second switch tube Q2 are respectively a gate, a source, and a drain of the PMOS tube.

For example, taking the first switch tube Q1 and the second switch tube Q2 as PMOS tubes, when the signal conversion unit 102 outputs a high-level switch signal to the switch unit 103, due to the voltage difference caused by the second resistor R2, the source voltage Vs of the first switch tube Q1 is greater than the gate voltage Vg, the source voltage Vs of the second switch tube Q2 is greater than the gate voltage Vg, the first switch tube Q1 and the second switch tube Q2 are both turned on, that is, the switch unit 102 is closed, and the intelligent terminal device 10 can be charged; when the signal conversion unit 102 outputs a low-level switching signal to the switching unit, the first switching tube Q1 and the second switching tube Q2 are both turned off, that is, the switching unit 102 is turned off, and the metal contact of the intelligent terminal device 10 is turned off from the internal power supply 200, so that the effect that the metal contact is not charged when not charged is achieved.

It should be noted that, the first switch tube Q1 and the second switch tube Q2 may also be set as NMOS tubes as required, or one of the NMOS tubes and one of the PMOS tubes as required; the switch unit 103 may further be configured as a combination of a plurality of NMOS transistors and a plurality of PMOS transistors as required, or the MOS transistor may be configured as other power switches, analog switches, etc. capable of implementing the above functions, which is not described herein again.

Alternatively, as shown in fig. 2, the signal conversion unit 102 includes a first transistor Q3, a third resistor R3, a fourth resistor R4, and a fifth resistor R5; a base electrode b of the first triode Q3 is electrically connected with a first end of the third resistor R3, an emitter electrode e of the first triode Q3 is grounded, and a collector electrode c of the first triode is electrically connected with a first end of the fourth resistor R4; a second end of the third resistor R3 is electrically connected with the hall detection unit 101; a second end of the fourth resistor R4 is electrically connected to the switch unit 103; a first end of the fifth resistor R5 is electrically connected to the base b of the first transistor Q3, and a second end of the fifth resistor R5 is grounded to GND.

Specifically, when the hall detection unit 101 does not detect a magnetic field, a high-level electrical signal is output to the signal conversion unit 102, the first triode Q3 is turned on, the collector c of the first triode Q3 outputs a low-level switching signal to the switching unit 103, and the switching unit 103 is turned off based on the low-level switching signal, so that the effect that the metal contact is not charged when not charged is achieved; when the hall detection unit 101 detects a magnetic field, it outputs an electrical signal of low level to the signal conversion unit 102, then the first triode Q3 is turned off, the collector c of the first triode Q3 is at high level, the switch unit 103 is turned on based on the switching signal of high level, and the intelligent terminal device 10 realizes the charging action.

Fig. 3 is a circuit diagram of another interface control circuit according to an embodiment of the present invention.

Optionally, as shown in fig. 3, the signal converting unit 102 further includes an inverter F1 and a sixth resistor R6; the switch unit 103 further comprises a USB switch chip USB-SW and a second capacitor C2; a first end of the inverter F1 is electrically connected with a first end of the sixth resistor R6, and a second end of the inverter F1 is electrically connected with a control end SEL of the USB switch chip USB-SW; a second end of the sixth resistor R6 is electrically connected to the hall sensing unit 101.

The positive input terminal D + _ IN of the USB switch chip USB-SW is electrically connected with the positive data terminal DP of the external USB interface J1, the negative input terminal D- _ IN of the USB switch chip USB-SW is electrically connected with the negative data terminal DM of the external USB interface J1, the power terminal VCC4 of the USB switch chip USB-SW is electrically connected with the second power supply VBUS, the ground terminal GND of the USB switch chip USB-SW is grounded, the enable terminal OE of the USB switch chip USB-SW is electrically connected with the first terminal of the second capacitor C2, the second terminal of the second capacitor C2 is grounded GND, the positive output terminal D + _ OUT of the USB switch chip USB-SW is electrically connected with the positive data terminal DP of the internal USB port J2 of the smart terminal device 10, and the negative output terminal D- _ OUT of the USB switch chip USB-SW is electrically connected with the negative data terminal DM of the internal USB port J2 of the smart terminal device 10.

As shown in FIG. 3, the power terminal VCC5 of the external USB interface J1 is electrically connected to the second power supply VBUS, the ground terminal GND of the external USB interface J1 is grounded, the ID of the tag terminal ID of the external USB interface J1 is set to be blank, the power terminal VCC6 of the internal USB port J2 of the smart terminal device 10 is electrically connected to the second power supply VBUS, the ground terminal GND of the internal USB port J2 of the smart terminal device 10 is grounded, and the ID of the tag terminal ID of the internal USB port J2 of the smart terminal device 10 is set to be blank.

Specifically, the interface control circuit 100 may further disconnect the communication contact of the communication interface from the internal power supply, protect the communication contact of the communication interface from being electrified when not in use, and prevent electrochemical corrosion caused by long-term electrification.

Exemplarily, referring to fig. 3, taking the USB communication interface as an example, when the USB interface is connected, the hall detection unit 101 detects a magnetic field of a magnet disposed at the USB interface, and outputs a low-level electrical signal to the signal conversion unit 102, the low-level electrical signal outputs a high-level switch signal via an inverter F1, i.e. a not gate, in the signal conversion unit 102, and sends the switch signal to a control terminal SEL of the USB switch chip USB-SW, and the USB switch chip USB-SW is turned on when the control terminal SEL of the USB switch chip USB-SW receives the high-level signal, so that the intelligent terminal 10 can perform USB communication normally; when the Hall detection unit 101 does not detect the magnetic field of the magnet arranged at the USB interface, the Hall detection unit 101 outputs a high-level electric signal, the high-level electric signal is converted into a low-level switching signal after passing through the inverter F1 and is sent to the control end SEL of the USB switching chip USB-SW, and the USB switching chip USB-SW is closed, so that the communication contact at the USB interface is not electrified any more and is in a low-level state, one of the conditions of electrochemical reaction is fundamentally blocked, and a good anti-corrosion effect is achieved.

It should be noted that the communication interface protected by the interface control circuit 100 includes, but is not limited to, a connection mode using metal contacts, and the USB communication interface may also include a connection mode of a standard type-C, micro-B.

In the embodiment of the utility model, the Hall detection unit is used for detecting whether the intelligent terminal device is close to the charging base or not, the level of the metal contact is controlled through the on-off of the switch unit, and the connection between the metal contact and the internal power supply is disconnected when the charging base is not detected, so that one of the conditions of electrochemical corrosion is blocked.

Fig. 4 is a structural diagram of an intelligent terminal device according to an embodiment of the present invention. An embodiment of the present invention further provides an intelligent terminal device, as shown in fig. 4, where the intelligent terminal device 10 includes the interface control circuit 100 according to any one of the above embodiments, and the intelligent terminal device 10 further includes a plurality of metal charging contacts VCC-T and a plurality of ground contacts GND-T; when the metal charging contact VCC-T and the ground contact GND-T are in contact with a corresponding charging contact (not identified in fig. 4) of the charging base 202 provided with the magnet 201, the intelligent terminal device 10 realizes charging.

Fig. 5 is a schematic diagram of an arrangement manner of a metal charging contact and a ground contact of an intelligent terminal device according to an embodiment of the present invention.

Optionally, as shown in fig. 5, the intelligent terminal device further includes a USB interface; the metal charging contacts VCC-T and the grounding contacts GND-T are respectively arranged at two ends of the USB interface.

Specifically, when the intelligent terminal device is provided with the USB interface, the plurality of metal charging contacts VCC-T and the plurality of grounding contacts GND-T can be respectively arranged at two ends of the USB interface, so that the distance between the metal charging contacts and the grounding contacts is increased to the greatest extent, namely the distance between the metal contacts of the power supply and the ground is structurally increased, and the effect of preventing corrosion is achieved.

Fig. 6 is a schematic diagram illustrating an arrangement of metal charging contacts and ground contacts of another intelligent terminal device according to an embodiment of the present invention.

Optionally, as shown in fig. 6, the intelligent terminal device further includes a tag a; a plurality of metal charging contacts VCC-T and a plurality of ground contacts GND-T are respectively arranged on two sides of the label A.

Specifically, when the intelligent terminal device is a wearable intelligent terminal, the plurality of metal charging contacts VCC-T and the plurality of ground contacts GND-T can be respectively arranged at two sides of a label A of the wearable intelligent terminal, or the plurality of metal charging contacts VCC-T and the plurality of ground contacts GND-T can be respectively arranged at two sides of an area where other devices are arranged, so that the metal charging contacts VCC-T and the ground contacts GND-T can be far away from each other as far as possible on the basis of not influencing the charging function and the appearance, and the function of preventing corrosion can be achieved.

Fig. 7 is a schematic diagram illustrating an arrangement of a metal charging contact and a ground contact of another intelligent terminal device according to an embodiment of the present invention.

Optionally, as shown in fig. 7, the plurality of metal charging contacts VCC-T and the plurality of ground contacts GND-T are disposed on the same side of the tag a, and the metal charging contacts VCC-T and the ground contacts GND-T are separated by a preset distance.

Specifically, when the intelligent terminal device is a wearable intelligent terminal, the plurality of metal charging contacts VCC-T and the plurality of ground contacts GND-T may be disposed on the same side of the tag a of the wearable intelligent terminal, or the plurality of metal charging contacts VCC-T and the plurality of ground contacts GND-T may be disposed on the same side of the region where the other device is disposed, but a preset distance needs to be detected between the metal charging contacts VCC-T and the ground contacts GND-T, that is, the metal charging contacts VCC-T and the ground contacts GND-T are separated from each other as far as possible on the basis of not affecting the charging function and the appearance, so as to prevent corrosion.

The intelligent terminal device provided by the embodiment of the present invention includes the interface control circuit in the above embodiment, and therefore, the intelligent terminal device provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, and details are not described herein again.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. The interface control circuit is characterized by being arranged in intelligent terminal equipment and comprising a Hall detection unit, a signal conversion unit and a switch unit;

the internal power supply of the intelligent terminal equipment is electrically connected with an external power supply through the switch unit, the external power supply comprises a charging base provided with a magnet, and the internal power supply of the intelligent terminal equipment is connected with the external power supply through the charging base for charging;

the switch unit is electrically connected with the Hall detection unit through the signal conversion unit, the Hall detection unit controls the switch unit to be switched off when the Hall detection unit does not detect the magnetic field of the charging base, and the signal conversion unit converts the electric signal output by the Hall detection unit into a switch signal and transmits the switch signal to the switch unit.

2. The interface control circuit of claim 1, wherein the hall detection unit comprises a hall chip, a first resistor, and a first capacitor;

the power supply end of the Hall chip is electrically connected with a first power supply, the grounding end of the Hall chip is grounded, and the output end of the Hall chip is electrically connected with the signal conversion unit;

the first end of the first resistor is electrically connected with a power supply end of the Hall chip, and the second end of the first resistor is electrically connected with an output end of the Hall chip;

the first end of the first capacitor is electrically connected with a power supply end of the Hall chip, and the second end of the first capacitor is grounded.

3. The interface control circuit of claim 2, wherein the switch unit comprises a first switch tube, a second switch tube and a second resistor;

the control end of the first switch tube and the control end of the second switch tube are both electrically connected with the signal conversion unit, the first end of the first switch tube is electrically connected with the power end of the external power supply, and the second end of the first switch tube is electrically connected with the first end of the second switch tube;

a second end of the second switch tube is electrically connected with a power supply end of the internal power supply of the intelligent terminal device;

the first end of the second resistor is electrically connected with the control end of the first switch tube and the control end of the second switch tube respectively, and the second end of the second resistor is electrically connected with the second end of the first switch tube and the first end of the second switch tube respectively.

4. The interface control circuit according to claim 3, wherein the first switch tube and the second switch tube are both PMOS tubes, the control end, the first end, and the second end of the first switch tube are respectively a gate, a drain, and a source of the PMOS tube, and the control end, the first end, and the second end of the second switch tube are respectively a gate, a source, and a drain of the PMOS tube.

5. The interface control circuit of claim 2, wherein the signal conversion unit comprises a first transistor, a third resistor, a fourth resistor, and a fifth resistor;

the base electrode of the first triode is electrically connected with the first end of the third resistor, the emitting electrode of the first triode is grounded, and the collecting electrode of the first triode is electrically connected with the first end of the fourth resistor;

the second end of the third resistor is electrically connected with the Hall detection unit; a second end of the fourth resistor is electrically connected with the switch unit; the first end of the fifth resistor is electrically connected with the base electrode of the first triode, and the second end of the fifth resistor is grounded.

6. The interface control circuit of claim 2, wherein the signal conversion unit further comprises an inverter and a sixth resistor; the switch unit further comprises a USB switch chip and a second capacitor;

the first end of the phase inverter is electrically connected with the first end of the sixth resistor, and the second end of the phase inverter is electrically connected with the control end of the USB switch chip; the second end of the sixth resistor is electrically connected with the Hall detection unit;

the positive input end of the USB switch chip is electrically connected with the positive data end of an external USB interface, the negative input end of the USB switch chip is electrically connected with the negative data end of the external USB interface, the power end of the USB switch chip is electrically connected with a second power supply, the grounding end of the USB switch chip is grounded, the enabling end of the USB switch chip is electrically connected with the first end of the second capacitor, the second end of the second capacitor is grounded, the positive output end of the USB switch chip is electrically connected with the positive data end of the internal USB port of the intelligent terminal device, and the negative output end of the USB switch chip is electrically connected with the negative data end of the internal USB port of the intelligent terminal device.

7. An intelligent terminal device, wherein the intelligent terminal device comprises the interface control circuit of any one of claims 1 to 6, and further comprises a plurality of metal charging contacts and a plurality of ground contacts;

when the metal charging contact is in contact with the grounding contact and the corresponding charging contact of the charging base provided with the magnet, the intelligent terminal equipment is charged.

8. The intelligent terminal device according to claim 7, wherein the intelligent terminal device further comprises a USB interface;

the plurality of metal charging contacts and the plurality of grounding contacts are respectively arranged at two ends of the USB interface.

9. The intelligent terminal device according to claim 7, wherein the intelligent terminal device further comprises a tag;

the metal charging contacts and the grounding contacts are arranged on two sides of the label respectively.

10. The intelligent terminal device according to claim 9, wherein a plurality of the metal charging contacts and a plurality of the ground contacts are disposed on the same side of the tag, and the metal charging contacts and the ground contacts are spaced apart by a preset distance.

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