CN118118058A

CN118118058A - Near field communication circuit and electronic equipment

Info

Publication number: CN118118058A
Application number: CN202410241172.1A
Authority: CN
Inventors: 黄奇瑞
Original assignee: Nanyang Institute of Technology
Current assignee: Nanyang Institute of Technology
Priority date: 2024-03-01
Filing date: 2024-03-01
Publication date: 2024-05-31

Abstract

The invention discloses a near field communication circuit and electronic equipment, which comprises a transmitting end, a receiving end and a communication end, wherein the transmitting end is provided with an oscillator, a power amplifier, an LC matching network and a transmitting coil, the receiving end is provided with a receiving coil, a rectifier, an LC filter, an LDO and a circuit load, the communication end is provided with an NFC controller and an NFC antenna, the receiving end in the communication circuit is arranged in the electronic receiving equipment, the electronic receiving equipment is provided with a protection component for protecting the inside of the electronic receiving equipment and improving the charging efficiency when the electronic receiving equipment is charged by utilizing an electromagnetic induction principle, and a swinging component for adjusting the orientation of an accommodating frame of an output end is arranged on a supporting shell.

Description

Near field communication circuit and electronic equipment

Technical Field

The invention relates to the technical field of communication, in particular to a near field communication circuit and electronic equipment.

Background

Near Field Communication (NFC) is a short-distance wireless connection technology based on Radio Frequency Identification (RFID) technology, and can realize non-contact point-to-point data transmission between electronic devices, and the working principle of an NFC circuit is mainly based on electromagnetic induction and load modulation, wherein the electromagnetic induction is a technology that a transmitter (such as an NFC reader-writer chip) in the NFC circuit generates an alternating magnetic field through an antenna, and when a receiver (such as an NFC tag chip) in another NFC circuit is close to the receiver, the antenna induces current in the magnetic field, so as to provide power for the receiver.

The existing NFC equipment is difficult to realize the dual functions of wireless charging and data communication, and the NFC electronic emission equipment is difficult to adjust the direction and the position of the emission end and the emission coil on the emission end when in use, so that various use scenes cannot be met when in use, and therefore, a certain improvement space exists.

Disclosure of Invention

The invention aims to provide a near field communication circuit and electronic equipment, which have the advantages of realizing the dual functions of wireless charging and data communication and meeting the requirements of different placement modes and spaces, and solve the problems that the dual functions of wireless charging and data communication are difficult to realize and various use scenes cannot be met during use.

In order to achieve the above purpose, the present invention provides the following technical solutions: a near field communication circuit and an electronic device comprise a transmitting end, a receiving end and a communication end;

The transmitting end is provided with an oscillator, a power amplifier, an LC matching network and a transmitting coil, the receiving end is provided with a receiving coil, a rectifier, an LC filter, an LDO and a circuit load, and the communication end is provided with an NFC controller and an NFC antenna;

the receiving end in the communication circuit is arranged in the electronic receiving equipment, the receiving end is electrically connected with a storage battery in the electronic receiving equipment, the storage battery is also electrically connected with a charging interface in the charging module, and the electronic receiving equipment is internally provided with a protection component for protecting the electronic receiving equipment and improving the charging efficiency when the electronic receiving equipment is charged by utilizing the electromagnetic induction principle;

The emission end and the communication end are arranged in the electron emission device, the electron emission device comprises an output end portion accommodating frame, a support shell is arranged below the output end portion accommodating frame, and a swinging component for adjusting the orientation of the output end portion accommodating frame is arranged on the support shell.

Preferably, the protection component comprises a protection interlayer arranged in the electronic equipment, the protection interlayer comprises a copper graphite shielding layer, a nanocrystalline panel, a polycarbonate outer ring and an electromagnetic shielding layer in sequence, and the receiving coil is arranged between the nanocrystalline panel and the polycarbonate outer ring.

Preferably, a magnetic ring is arranged on the outer ring of the nanocrystalline panel, and the magnetic ring is fixedly connected to the copper graphite shielding layer.

Preferably, the polycarbonate outer ring is sleeved on the receiving coil outer ring, the magnetic ring is sleeved on the nanocrystalline panel outer ring, and the copper graphite shielding layer, the nanocrystalline panel, the receiving coil and the electromagnetic shielding layer are sequentially and fixedly connected.

Preferably, the swinging component comprises a rectangular seat fixedly connected to a supporting shell, a central shaft driven by a motor to freely rotate is arranged on the rectangular seat, the top of the central shaft is fixedly connected with a middle swinging seat, the middle swinging seat is fixedly connected with a transverse shaft through a bearing, two ends of the transverse shaft are respectively fixedly connected with an L-shaped supporting plate and a side swinging seat, the L-shaped supporting plate and the side swinging seat are respectively positioned on two sides of the middle swinging seat, the top of the L-shaped supporting plate is fixedly connected with an output end containing frame, and a pitching component for driving the transverse shaft to swing is arranged on the supporting shell.

Preferably, the every single move subassembly is including setting up at rectangular seat periphery side and at the outer ring seat of vertical direction free motion, outer ring seat upper surface through support piece fixedly connected with annular frame, has seted up annular cavity on the annular frame, is equipped with the positioning spheroid in the annular cavity, and the positioning spheroid passes through annular cavity sliding contact annular frame, and the positioning spheroid passes through cylinder fixed connection on the side pendulum seat.

Preferably, a cylinder body capable of freely rotating in the vertical direction is arranged on one side of the support shell, a V-shaped swing rod is fixedly connected to the cylinder body, limiting pins are fixedly connected to opposite faces of two ends of the V-shaped swing rod, two groups of limiting rings which are arranged up and down are arranged at positions, corresponding to the limiting pins, of the outer ring seat, the limiting rings are fixedly connected to the outer ring seat, and the limiting pins are in sliding contact with the limiting rings and are located between the two groups of limiting rings.

Preferably, the support shell comprises an integrally formed side vertical part, the cylinder body is arranged in the side vertical part, the cylinder body fixed shaft rotates on the side wall of the side vertical part, a motor is fixedly connected inside the side vertical part, the output end of the motor is fixedly connected with the cylinder body and is coaxial with the cylinder body, and a yielding groove is formed in the side vertical part corresponding to the position of the V-shaped swing rod.

Compared with the prior art, the invention has the following beneficial effects:

The invention can realize the dual functions of wireless charging and data communication, improves the use efficiency and convenience of the electronic equipment, and is provided with the protection component to protect the electronic receiving equipment from external interference and damage, thereby ensuring the normal operation of the receiving coil and prolonging the service life of the electronic receiving equipment.

According to the wireless charging device, the swinging component is arranged, the relative positions among the coils can be adjusted by changing the direction and the inclination angle of the accommodating frame at the output end, so that the wireless charging efficiency and stability are improved, meanwhile, the flexibility and convenience of wireless charging are also improved, and different placing modes and space requirements are met.

Drawings

Fig. 1 is a schematic diagram of a circuit of an electronic receiving device for wireless charging according to the present invention;

FIG. 2 is a schematic diagram of a passivation layer according to the present invention;

FIG. 3 is a schematic perspective view of an electron emission device according to the present invention;

fig. 4 is a side view of an electron emission device according to the present invention;

FIG. 5 is a schematic view of the parts of the outer ring seat of the present invention;

FIG. 6 is a schematic diagram of the components of the pendulum seat of the present invention;

FIG. 7 is a schematic diagram of the components of the positioning sphere of the present invention;

Fig. 8 is a schematic view of a part where the limiting pin of the present invention is located.

In the figure: 1. a transmitting coil; 2. a receiving coil; 3. a support housing; 301. a side stand; 4. an output end receiving frame; 5. a copper graphite shielding layer; 6. a nanocrystalline panel; 7. a magnetic ring; 8. a polycarbonate outer ring; 9. an electromagnetic shielding layer; 10. a rectangular seat; 11. a central shaft; 12. a middle swing seat; 13. a side swing seat; 14. an L-shaped support plate; 15. an outer ring seat; 16. an annular frame; 17. an annular chamber; 18. positioning spheres; 19. a limiting ring; 20. a limiting pin; 21. v-shaped swing rod; 22. a cylinder; 23. and (5) giving way.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 8, the present invention provides a technical solution: a near field communication circuit and an electronic device comprise a transmitting end, a receiving end and a communication end;

The transmitting end is provided with an oscillator, a power amplifier, an LC matching network and a transmitting coil 1, the receiving end is provided with a receiving coil 2, a rectifier, an LC filter, an LDO and a circuit load, and the communication end is provided with an NFC controller and an NFC antenna;

The transmitting terminal and the communication terminal are arranged in the electron transmitting device, the electron transmitting device comprises an output end containing frame 4, a supporting shell 3 is arranged below the output end containing frame 4, and a swinging component for adjusting the direction of the output end containing frame 4 is arranged on the supporting shell 3.

As shown in fig. 1 to fig. 4, when data communication or signal control is performed by using the NFC technology, an alternating magnetic field is generated by a transmitting end, and when a receiving end (such as an NFC tag chip) in another NFC circuit is close, an antenna thereof induces a current in the magnetic field, so as to provide power for a receiver, thereby enabling two devices to exchange data with each other.

When the NFC equipment is used for charging, energy transmission between the transmitting end and the receiving end is realized through an electromagnetic induction principle, namely, alternating magnetic field generated by the transmitting coil 1 induces alternating current in the receiving coil 2, so that wireless charging is realized, wherein the communication end is realized through NFC protocol, namely, modulation and demodulation are carried out through carrier waves, so that data communication is realized.

Meanwhile, when the electronic receiving device is placed on the output end portion accommodating frame 4 during wireless charging or data communication, the transmitting coil 1 and the receiving coil 2 are mutually corresponding, and the inclination angle and the position of the output end portion accommodating frame 4 can be adjusted through the swinging component, in the charging process, if the orientation and the inclination angle of the output end portion accommodating frame 4 are fixed, the placing mode and the space of the electronic receiving device are limited, the flexibility and the convenience of wireless charging are reduced, for example, if the output end portion accommodating frame 4 can only be placed horizontally, the electronic receiving device can only be placed horizontally, and cannot be erected or inclined, so that the screen or the electronic receiving device is not easy to view or operate. Therefore, the direction and the inclination angle of the output end part accommodating frame 4 can be changed to adapt to different placing modes and space requirements of the electronic receiving equipment, and the flexibility and the convenience of wireless charging are improved.

Wherein, the electromagnetic induction principle is utilized to wirelessly charge the electronic receiving equipment, under the interaction of magnetic fields between the transmitting coil 1 and the receiving coil 2, when the magnetic flux directions of the two coils are the same, attractive force is generated, so that the two coils are tightly attached, and a certain magnetic attraction is formed between the output end containing frame 4 and the electronic receiving equipment, thereby avoiding the phenomenon that the electronic receiving equipment falls down due to random sliding,

It is worth noting that the transmitting end is provided with an oscillator, a power amplifier, an LC matching network and a transmitting coil 1, wherein the oscillator is used for generating an alternating current signal with specific frequency and waveform, the power amplifier is used for increasing the power amplitude of an input signal, and the purpose of the transmitting end is to generate and transmit an alternating magnetic field.

The receiving end is provided with a receiving coil 2, a rectifier, an LC filter, an LDO and a circuit load, wherein the rectifier is used for converting alternating current into unidirectional pulsating direct current, the LC filter is a filter circuit formed by utilizing the characteristics of inductance and capacitance, signals with specific frequencies such as harmonic waves, noise and the like can be removed, the rectifier is used for smoothing the rectified pulsating direct current, removing or reducing alternating current components and improving the stability of output voltage, and the receiving end is used for receiving and converting an alternating magnetic field into direct current.

The communication terminal is provided with an NFC controller and an NFC antenna, and the purpose of the communication terminal is to realize data communication and control signal exchange with the transmitting terminal.

As shown in fig. 1, fig. 1 is a schematic diagram of a wireless charging circuit for an electronic receiving device using NFC technology, where:

VIN: input voltage refers to the supply voltage received by a circuit or device.

PWM: pulse width modulation, which refers to a technique of switching control of a power supply voltage using a switching device, can change the average value or duty cycle of an output signal.

VRECT: the rectified voltage is an output voltage after converting alternating current into direct current.

LDO (Low dropout regulator): a low dropout linear regulator refers to a linear regulator capable of providing a stable output voltage with a small input and output voltage difference.

VOUT: output voltage refers to the voltage value of an output signal provided by a circuit or device.

BATTERY: a battery refers to a device capable of converting chemical energy into electrical energy, here a storage battery in an electronic receiving device.

Charge: a charger circuit refers to a circuit capable of providing a charging current and voltage to a battery or battery pack.

SW: the switch node refers to a node which changes in a switch circuit, and the voltage or current of the SW node can change along with the on or off of a switch tube, so that the working state and the efficiency of the circuit are affected.

In one preferred embodiment, the protection component comprises a protection interlayer arranged in the electronic device, the protection interlayer comprises a copper graphite shielding layer 5, a nanocrystalline panel 6, a polycarbonate outer ring 8 and an electromagnetic shielding layer 9 in sequence, and the receiving coil 2 is arranged between the nanocrystalline panel 6 and the polycarbonate outer ring 8.

As shown in fig. 2, the protection component is used for protecting the electronic receiving device from external interference and damage, such as electromagnetic radiation, electrostatic discharge, mechanical impact, and the like, and the protection component is used for forming a multi-layer shielding and buffering effect by using different materials and structures, so that the influence of the external environment on the electronic receiving device is isolated or weakened.

Wherein, copper graphite shielding layer 5 can effectively shield high frequency electromagnetic wave, and nanocrystalline panel 6 can absorb and convert low frequency magnetic field, and polycarbonate outer loop 8 can provide mechanical strength and heat resistance, and electromagnetic shielding layer 9 can block electrostatic discharge and low frequency electromagnetic wave, and then guarantees receiving coil 2's normal work, does not receive external interference and damage.

On the basis of the protection component embodiment, a magnetic ring 7 is arranged on the outer ring of the nanocrystalline panel 6, the magnetic ring 7 is fixedly connected to the copper graphite shielding layer 5, a polycarbonate outer ring 8 is sleeved on the outer ring of the receiving coil 2, the magnetic ring 7 is sleeved on the outer ring of the nanocrystalline panel 6, and the copper graphite shielding layer 5, the nanocrystalline panel 6, the receiving coil 2 and the electromagnetic shielding layer 9 are sequentially and fixedly connected.

As shown in fig. 2, the magnetic ring 7 has the function of enhancing the magnetic performance of the nanocrystalline panel 6, improving the absorption and conversion efficiency of the nanocrystalline panel to the low-frequency magnetic field, and the nanocrystalline panel 6 is positioned between the copper graphite shielding layer 5 and the receiving coil 2, so that the low-frequency magnetic field can be absorbed and converted, the interference of the receiving coil 2 is reduced, and meanwhile, the influence of the copper graphite shielding layer 5 on the receiving coil 2 can be isolated.

The receiving coil 2 is located between the nanocrystalline panel 6 and the electromagnetic shielding layer 9, so that external interference and damage can be avoided to a certain extent, and meanwhile, the magnetic properties of the nanocrystalline panel 6 and the electromagnetic shielding layer 9 can be utilized, so that the receiving efficiency of the nanocrystalline panel is improved.

Further, the swinging component comprises a rectangular seat 10 fixedly connected to the supporting shell 3, a central shaft 11 which is driven by a motor to freely rotate is arranged on the rectangular seat 10, a middle swinging seat 12 is fixedly connected to the top of the central shaft 11, a transverse shaft is fixedly connected to the middle swinging seat 12 through a bearing, an L-shaped supporting plate 14 and a side swinging seat 13 are respectively and fixedly connected to two ends of the transverse shaft, the L-shaped supporting plate 14 and the side swinging seat 13 are respectively positioned on two sides of the middle swinging seat 12, an output end containing frame 4 is fixedly connected to the top of the L-shaped supporting plate 14, and a pitching component for driving the transverse shaft to swing is arranged on the supporting shell 3.

As shown in fig. 4 to 7, when the orientation of the output end accommodating frame 4 is changed, the central shaft 11 is driven by the motor to rotate freely in the horizontal direction, so as to drive the center swing seat 12 on the central shaft 11 to rotate synchronously with the central shaft, the center swing seat 12 rotates fixedly with a vertical rotating transverse shaft, and when the center swing seat 12 rotates horizontally, the transverse shaft on the center swing seat 12 is driven to rotate synchronously with the L-shaped supporting plate 14 on the transverse shaft, so that the orientation of the output end accommodating frame 4 on the L-shaped supporting plate 14 is changed.

On the basis of the embodiment of the swinging component, the pitching component comprises an outer ring seat 15 which is arranged on the outer peripheral side of the rectangular seat 10 and moves freely in the vertical direction, the upper surface of the outer ring seat 15 is fixedly connected with an annular frame 16 through a supporting piece, an annular cavity 17 is formed in the annular frame 16, a positioning sphere 18 is arranged in the annular cavity 17, the positioning sphere 18 is in sliding contact with the annular frame 16 through the annular cavity 17, and the positioning sphere 18 is fixedly connected to the side swinging seat 13 through a column body.

As shown in fig. 6 and 7, when the pitch angle of the output end accommodating frame 4 is adjusted, the annular frame 16 on the output end accommodating frame 4 is driven to synchronously move with the output end accommodating frame 4 through the outer ring seat 15 which freely moves in the vertical direction, the annular frame 16 is in sliding contact with the positioning ball 18 through the annular cavity 17, the height of the positioning ball 18 is changed, when the height of the positioning ball 18 is changed, the side swinging seat 13 is driven to rotate with the transverse shaft, the L-shaped supporting plate 14 is driven to synchronously rotate, the output end accommodating frame 4 on the output end accommodating frame is changed to synchronously rotate, and the pitch angle of the output end accommodating frame 4 is changed.

On the basis of the pitching assembly embodiment, one side of the supporting shell 3 is provided with a barrel 22 which freely rotates in the vertical direction, a V-shaped swing rod 21 is fixedly connected to the barrel 22, limiting pins 20 are fixedly connected to opposite surfaces of two ends of the V-shaped swing rod 21, two groups of limiting rings 19 which are arranged up and down are arranged at positions of the outer ring seat 15 corresponding to the limiting pins 20, the limiting rings 19 are fixedly connected to the outer ring seat 15, and the limiting pins 20 are in sliding contact with the limiting rings 19 and are positioned between the two groups of limiting rings 19.

The support shell 3 comprises an integrally formed side stand part 301, the cylinder 22 is positioned in the side stand part 301, the cylinder 22 is fixedly pivoted on the side wall of the side stand part 301, a motor is fixedly connected inside the side stand part 301, the output end of the motor is fixedly connected with the cylinder 22 and is coaxial with the cylinder 22, and a yielding groove 23 is formed in the side stand part 301 corresponding to the position of the V-shaped swing rod 21.

As shown in fig. 4, 6 and 8, the cylinder 22 arranged in the side stand 301 is driven by a motor to freely rotate in the vertical direction, so as to drive the V-shaped swing rod 21 to swing in the vertical direction, when the V-shaped swing rod 21 swings, the limiting pin 20 arranged at the end part of the V-shaped swing rod drives the outer ring seat 15 to move in the vertical direction under the action of the limiting ring 19, so that the height of the positioning ball 18 is changed by changing the height of the outer ring seat 15, the transverse shaft and the L-shaped support plate 14 on the transverse shaft are driven to deflect in the vertical direction by changing the height of the positioning ball 18, and the orientation of the output end part accommodating frame 4 in the vertical direction is changed, so that different placing modes and space requirements of electronic receiving equipment are met, and the flexibility and convenience of NFC equipment in wireless charging or data communication are improved.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A near field communication circuit, characterized by: the device comprises a transmitting end, a receiving end and a communication end;

the transmitting end is provided with an oscillator, a power amplifier, an LC matching network and a transmitting coil (1), the receiving end is provided with a receiving coil (2), a rectifier, an LC filter, an LDO and a circuit load, and the communication end is provided with an NFC controller and an NFC antenna;

the emission end and the communication end are arranged in the electron emission device, the electron emission device comprises an output end portion accommodating frame (4), a support shell (3) is arranged below the output end portion accommodating frame (4), and a swinging component for adjusting the direction of the output end portion accommodating frame (4) is arranged on the support shell (3).

2. An electronic device using a near field communication circuit according to claim 1, characterized in that: the protection assembly comprises a protection interlayer arranged in the electronic equipment, the protection interlayer sequentially comprises a copper graphite shielding layer (5), a nanocrystalline panel (6), a polycarbonate outer ring (8) and an electromagnetic shielding layer (9), and the receiving coil (2) is arranged between the nanocrystalline panel (6) and the polycarbonate outer ring (8).

3. An electronic device as claimed in claim 2, characterized in that: the outer ring of the nanocrystalline panel (6) is provided with a magnetic ring (7), and the magnetic ring (7) is fixedly connected to the copper graphite shielding layer (5).

4. An electronic device according to claim 3, characterized in that: the polycarbonate outer ring (8) is sleeved on the outer ring of the receiving coil (2), the magnetic ring (7) is sleeved on the outer ring of the nanocrystalline panel (6), and the copper graphite shielding layer (5), the nanocrystalline panel (6), the receiving coil (2) and the electromagnetic shielding layer (9) are sequentially and fixedly connected.

5. An electronic device as recited in claim 4, wherein: the swinging component comprises a rectangular seat (10) fixedly connected to a supporting shell (3), a central shaft (11) which is driven by a motor to freely rotate is arranged on the rectangular seat (10), a middle swinging seat (12) is fixedly connected to the top of the central shaft (11), a transverse shaft is fixedly connected to the middle swinging seat (12) through a bearing, an L-shaped supporting plate (14) and a side swinging seat (13) are respectively fixedly connected to two ends of the transverse shaft, the L-shaped supporting plate (14) and the side swinging seat (13) are respectively positioned on two sides of the middle swinging seat (12), an output end containing frame (4) is fixedly connected to the top of the L-shaped supporting plate (14), and a pitching component for driving the transverse shaft to swing is arranged on the supporting shell (3).

6. An electronic device as recited in claim 5, wherein: the pitching assembly comprises an outer ring seat (15) which is arranged on the outer peripheral side of a rectangular seat (10) and moves freely in the vertical direction, an annular frame (16) is fixedly connected to the upper surface of the outer ring seat (15) through a supporting piece, an annular cavity (17) is formed in the annular frame (16), a positioning ball body (18) is arranged in the annular cavity (17), the positioning ball body (18) is in sliding contact with the annular frame (16) through the annular cavity (17), and the positioning ball body (18) is fixedly connected to a side swinging seat (13) through a column body.

7. An electronic device as recited in claim 6, wherein: one side of the support shell (3) is provided with a barrel body (22) capable of freely rotating in the vertical direction, a V-shaped swing rod (21) is fixedly connected to the barrel body (22), limiting pins (20) are fixedly connected to opposite surfaces of two ends of the V-shaped swing rod (21), two groups of limiting rings (19) which are arranged up and down are arranged at positions of the outer ring seat (15) corresponding to the limiting pins (20), the limiting rings (19) are fixedly connected to the outer ring seat (15), and the limiting pins (20) are in sliding contact with the limiting rings (19) and are located between the two groups of limiting rings (19).

8. An electronic device as recited in claim 7, wherein: the support shell (3) comprises an integrally formed side stand part (301), the cylinder body (22) is located in the side stand part (301), the cylinder body (22) rotates on the side wall of the side stand part (301) in a fixed shaft mode, a motor is fixedly connected to the inside of the side stand part (301), the output end of the motor is fixedly connected with the cylinder body (22) and is coaxial with the cylinder body (22), and a yielding groove (23) is formed in the position, corresponding to the V-shaped swing rod (21), of the side stand part (301).