A mouse device with authentication function

Abstract

This utility model discloses a mouse device with identity authentication function, relating to the field of mouse technology. It includes: a mouse body with an internal PCB motherboard integrating a charging management chip, an MCU control chip, a FIDO 2.0 authentication chip, and an NFC communication chip; a fingerprint recognition module disposed on the upper surface of the mouse body and connected to the MCU control chip via an SPI bus; an NFC antenna surrounding the bottom of the mouse body and connected to the NFC communication chip via a 50Ω microstrip line; and an electromagnetic shielding structure disposed between the bottom layer of the PCB motherboard and the top of the NFC antenna. This utility model adopts a modular structure to integrate the FIDO 2.0 authentication chip, fingerprint recognition module, NFC communication module, and MCU inside the mouse. By optimizing the PCB layout and electromagnetic interference shielding measures, it ensures that each module works collaboratively without interfering with each other, facilitating identity authentication during one-handed operation.

Description

Technical Field

[0001] This utility model relates to the field of mouse technology, and in particular to a mouse device with identity authentication function. Background Technology

[0002] As online services increasingly demand higher security for identity verification, traditional password login methods have gradually revealed problems such as low security, susceptibility to data breaches, and poor user experience. FIDO 2.0, as a next-generation passwordless authentication protocol, can achieve fast, secure, and decentralized user authentication.

[0003] Currently, some identity authentication devices have integrated fingerprint recognition functionality, but this technology has not yet been combined with mice. They also lack integration support for NFC modules and the FIDO 2.0 protocol, making it difficult to meet the needs of rapid authentication across multiple terminals. Therefore, there is an urgent need for a mouse device with identity authentication functionality to improve authentication efficiency and ease of use for terminals. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mouse device with authentication functionality. Its advantages lie in its modular structure, integrating the FIDO 2.0 authentication chip, fingerprint recognition module, NFC communication module, and MCU within the mouse, facilitating authentication for single-handed operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mouse device with authentication functionality includes:

[0007] The mouse body has an internal PCB motherboard, which integrates a charging management chip, an MCU control chip, a FIDO 2.0 authentication chip, and an NFC communication chip.

[0008] A fingerprint recognition module is disposed in a module slot on the upper surface of the mouse body and is connected to the MCU control chip via an SPI bus;

[0009] An NFC antenna is arranged around the bottom of the mouse body and is connected to the NFC communication chip via a 50Ω microstrip line.

[0010] An electromagnetic shielding structure is disposed between the bottom layer of the PCB motherboard and the top of the NFC antenna.

[0011] The above technical solutions facilitate user authentication when operating with one hand.

[0012] The present invention is further configured such that the mouse body includes a top cover and a bottom shell that are interlocked, and the top cover is provided with a scroll wheel and left and right buttons on its upper surface, and an indicator light is provided near the middle of the bottom of the bottom shell, and the PCB motherboard is fixedly installed in the cavity formed by the top cover and the bottom shell.

[0013] The above technical solutions enable the basic functions of a mouse.

[0014] The present invention is further configured such that the MCU control chip is responsible for coordinating the data processing of each module, the FIDO2.0 authentication chip has a built-in security chip, and the security chip is used to locally store the user's private key and authentication information, and to perform identity authentication in conjunction with the FIDO2.0 protocol, and the NFC communication chip is used to perform short-range communication with mobile terminals, access control systems and laptop devices with NFC function.

[0015] The present invention is further configured such that the fingerprint recognition module includes a capacitive fingerprint sensor and an ASIC processing chip, and the ASIC processing chip has a built-in liveness detection algorithm for verifying the authenticity of the fingerprint.

[0016] The present invention is further configured such that the MCU control chip runs a multi-tasking operating system based on RTOS, including fingerprint recognition task, NFC communication task, FIDO2.0 protocol processing task and low power management task, and the tasks are synchronized through message queues.

[0017] The above technical solutions facilitate the generation of authentication requests.

[0018] The present invention is further configured such that the mouse body has a replaceable battery compartment inside, and a wireless charging coil is installed inside the battery compartment. The wireless charging coil is connected to the charging management chip on the PCB motherboard. The side of the top cover has an interface that is connected to the wireless charging coil for connecting to external devices. The wireless charging coil supports Qi standard wireless charging.

[0019] The above technical solutions facilitate powering the entire mouse.

[0020] The present invention is further configured such that the electromagnetic shielding structure includes a grounding copper foil laid on the bottom layer of the PCB motherboard at the position corresponding to the NFC antenna ring path, and the grounding copper foil is connected to the grounding layer inside the PCB motherboard through a via. A flexible ferrite sheet is disposed between the NFC antenna and the PCB motherboard, and the flexible ferrite sheet covers the NFC antenna area. The width of the grounding copper foil is greater than the width of the flexible ferrite sheet. The bottom inner wall of the bottom shell is coated with a conductive paint layer, and the grounding copper foil is electrically connected to the conductive paint layer through a metal spring.

[0021] The above technical solutions form a double-layer Faraday cage consisting of a PCB shielding layer and a metal casing, which improves the overall electromagnetic interference suppression performance and ensures stable certification signals.

[0022] The present invention is further configured such that an annular groove is provided at the bottom of the bottom shell, and a protective net is installed on the annular groove to protect the NFC antenna and the flexible ferrite sheet. The flexible ferrite sheet, the NFC antenna and the protective net are installed in the annular groove from top to bottom. At least three support pads are provided at the bottom of the bottom shell, and the support pads are made of polytetrafluoroethylene material and are evenly distributed on the bottom edge of the bottom shell.

[0023] The above technical solutions facilitate the protection of the NFC antenna and flexible ferrite sheet, support the entire mouse with the support pad, and reduce sliding friction resistance.

[0024] The beneficial effects of this utility model are as follows:

[0025] 1. This utility model adopts a modular structure, integrating the FIDO2.0 authentication chip, fingerprint recognition module, NFC communication module and MCU inside the mouse. By optimizing the PCB layout and electromagnetic interference shielding measures, it ensures that each module works together without interfering with each other. The fingerprint recognition module is located on the upper surface of the mouse near the scroll wheel, which is convenient for users to authenticate their identity when operating with one hand. The NFC antenna is wrapped around the bottom of the mouse to ensure the coverage and signal strength of near-field communication.

[0026] 2. In this utility model, a grounding copper foil is laid on the bottom layer of the PCB motherboard, and a flexible ferrite sheet is used to suppress the electric field and magnetic field interference of the NFC antenna, ensuring the signal stability of the FIDO2.0 authentication chip and the fingerprint recognition module. The conductive paint on the inner wall of the bottom shell and the grounding copper foil are electrically connected through metal springs to form a complete Faraday cage, which improves the electromagnetic interference suppression efficiency, avoids high-frequency signal interference to sensitive components, and ensures the reliability of the authentication process. Attached Figure Description

[0027] Figure 1 A perspective view of a mouse device with identity authentication function proposed in this utility model;

[0028] Figure 2 A bottom view of a mouse device with identity authentication function proposed in this utility model;

[0029] Figure 3 An exploded view of a mouse device with identity authentication function proposed in this utility model;

[0030] Figure 4 This is a schematic diagram of the annular groove structure of a mouse device with identity authentication function proposed in this utility model.

[0031] In the diagram: 1. Top cover; 2. Fingerprint recognition module; 3. Scroll wheel; 4. Left and right buttons; 5. Bottom shell; 6. Support pad; 7. Protective mesh; 8. Indicator light; 9. Interface; 10. Module slot; 11. PCB motherboard; 12. Grounding copper foil; 13. Metal spring; 14. Flexible ferrite sheet; 15. NFC antenna; 16. Conductive paint; 17. Annular groove. Detailed Implementation

[0032] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0033] Reference Figures 1-4 This utility model provides a mouse device with identity authentication function, including:

[0034] The mouse body contains a PCB motherboard 11, which integrates a charging management chip, an MCU control chip, a FIDO 2.0 authentication chip, and an NFC communication chip. The MCU control chip is responsible for coordinating the data processing of each module. The FIDO 2.0 authentication chip has a built-in security chip, which is used to locally store the user's private key and authentication information, and to perform identity authentication in accordance with the FIDO 2.0 protocol. The NFC communication chip is used for short-range communication with NFC-enabled mobile terminals, access control systems, and laptops. The MCU control chip runs a multi-tasking operating system based on RTOS, including fingerprint recognition tasks, NFC communication tasks, FIDO 2.0 protocol processing tasks, and low-power management tasks. Synchronization between tasks is achieved through message queues.

[0035] The fingerprint recognition module 2 is located in the module slot 10 on the upper surface of the mouse body and is connected to the MCU control chip via the SPI bus. The fingerprint recognition module 2 includes a capacitive fingerprint sensor and an ASIC processing chip. The ASIC processing chip has a built-in liveness detection algorithm to verify the authenticity of the fingerprint. When the fingerprint recognition module 2 on the upper surface of the mouse is pressed, the capacitive sensor acquires the fingerprint image. The ASIC processing chip performs preprocessing (such as noise reduction and feature extraction) and transmits it to the MCU control chip via the SPI bus. The ASIC chip has a built-in algorithm to verify the authenticity of the fingerprint (such as detecting the frequency of capacitance change) and eliminate fake fingerprint attacks. The MCU control module sends the preprocessed fingerprint feature data to the security chip of the FIDO2.0 authentication chip, compares it with the locally stored private key and template, and generates an authentication request.

[0036] The NFC antenna 15 is positioned around the bottom of the mouse body and is connected to the NFC communication chip via a 50Ω microstrip line.

[0037] An electromagnetic shielding structure is installed between the bottom layer of the PCB motherboard 11 and the top of the NFC antenna 15.

[0038] To implement the basic functions of a mouse, refer to... Figure 1 and Figure 2 The mouse body also includes a top cover 1 and a bottom shell 5 that are interlocked. The top cover 1 has a scroll wheel 3 and left and right buttons 4 on its upper surface. The bottom shell 5 has an indicator light 8 near the center. The PCB motherboard 11 is fixedly installed in the cavity formed by the top cover 1 and the bottom shell 5. The mouse body has a replaceable battery compartment inside, and a wireless charging coil is installed in the battery compartment. The wireless charging coil is connected to the charging management chip on the PCB motherboard 11. The side of the top cover 1 has an interface 9, which is connected to the wireless charging coil for connecting external devices. The wireless charging coil supports Qi standard wireless charging.

[0039] To prevent electromagnetic interference, refer to Figure 2 , Figure 3 and Figure 4 The electromagnetic shielding structure includes a grounding copper foil 12 laid on the bottom layer of the PCB motherboard 11 at the position corresponding to the annular path of the NFC antenna 15. The grounding copper foil 12 is connected to the grounding layer inside the PCB motherboard 11 through a via. A flexible ferrite sheet 14 is provided between the NFC antenna 15 and the PCB motherboard 11, and the flexible ferrite sheet 14 covers the area of ​​the NFC antenna 15. The width of the grounding copper foil 12 is greater than the width of the flexible ferrite sheet 14. The bottom inner wall of the bottom shell 5 is coated with a conductive paint layer 16, and the grounding copper foil 12 is electrically connected to the conductive paint layer 16 through a metal spring 13. An annular groove 17 is opened at the bottom of the bottom shell 5, and a protective mesh 7 is installed on the annular groove 17 to protect the NFC antenna 15 and the flexible ferrite sheet 14. The flexible ferrite sheet 14 and the NFC antenna 15 are connected to the NFC antenna 15 and the flexible ferrite sheet 14. The protective net 5 and the protective net 7 are installed from top to bottom in the annular groove 17. The bottom of the bottom shell 5 is provided with at least three support pads 6, and the support pads 6 are made of polytetrafluoroethylene material and are evenly distributed on the bottom edge of the bottom shell 5. The bottom layer of the PCB motherboard 11 is laid with grounding copper foil 12, which is connected to the internal grounding layer through a via to form a low impedance loop. This circuit senses and cancels the electric field radiated by the NFC antenna 15, causing the electric field strength in the area of ​​the PCB motherboard 11 to decrease. The high-frequency magnetic loss characteristics of the flexible ferrite sheet 14 absorb the magnetic field energy, suppress its coupling interference to the fingerprint recognition module 2 and the security chip, and reduce the magnetic field strength. Furthermore, the conductive paint layer 16 sprayed on the inner wall of the bottom shell 5 forms a double-layer Faraday cage of "PCB shielding layer + metal shell", which improves the overall electromagnetic interference suppression efficiency and ensures the stability of the authentication signal.

[0040] Working principle: When in use, the user presses the fingerprint recognition module 2 on the upper surface of the mouse. The capacitive sensor collects the fingerprint image, the ASIC processing chip performs preprocessing (such as noise reduction and feature extraction), and transmits it to the MCU control chip via the SPI bus. The ASIC chip's built-in algorithm verifies the authenticity of the fingerprint (such as detecting the frequency of capacitance change) and eliminates fake fingerprint attacks. The MCU sends the preprocessed fingerprint feature data to the security chip of the FIDO2.0 authentication chip, compares it with the locally stored private key and template, and generates an authentication request.

[0041] The NFC antenna 15 surrounds the bottom of the bottom shell 5. When it is close to a device with NFC function (such as a mobile phone or access card), a connection is established through the radio frequency field. The NFC communication chip receives the authentication request or identity certificate of the external device and transmits it to the MCU through the 50Ω microstrip line. The MCU coordinates the FIDO2.0 authentication chip to generate a digital signature or verification information and then returns the result through the NFC antenna 15.

[0042] The bottom layer of the PCB motherboard 11 is covered with a grounding copper foil 12, which is connected to the internal grounding layer through vias to form a low-impedance loop. This loop senses and cancels the electric field radiated by the NFC antenna 15, causing the electric field strength in the PCB motherboard 11 area to decrease. A flexible ferrite sheet 14 covers the NFC antenna 15, and by utilizing the high-frequency magnetic loss characteristics of ferrite, it absorbs magnetic field energy and suppresses its coupling interference to the fingerprint recognition module 2 and the security chip, thus decreasing the magnetic field strength. The conductive paint layer 16 sprayed on the inner wall of the bottom shell 5 is electrically connected to the grounding copper foil 12 through a metal spring 13, forming a double-layer Faraday cage of "PCB shielding layer + metal shell", which improves the overall electromagnetic interference suppression efficiency and ensures the stability of the authentication signal.

[0043] An external power source is connected via the side interface 9 of the top cover 1, and the charging management chip controls the current to charge the built-in battery.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mouse device with an identity authentication function, characterized by comprising: include: The mouse body has a PCB motherboard (11) inside, which integrates a charging management chip, an MCU control chip, a FIDO2.0 authentication chip and an NFC communication chip. The fingerprint recognition module (2) is located in the module slot (10) on the upper surface of the mouse body and is connected to the MCU control chip via the SPI bus. An NFC antenna (15) is arranged around the bottom of the mouse body and is connected to the NFC communication chip via a 50Ω microstrip line; An electromagnetic shielding structure is disposed between the bottom layer of the PCB motherboard (11) and the top of the NFC antenna (15).

2. A mouse device with authentication function according to claim 1, characterized in that, The mouse body also includes a top cover (1) and a bottom shell (5) that are interlocked. The top cover (1) is provided with a scroll wheel (3) and left and right buttons (4) on its upper surface. An indicator light (8) is provided near the middle of the bottom of the bottom shell (5). The PCB motherboard (11) is fixedly installed in the cavity formed by the top cover (1) and the bottom shell (5).

3. A mouse device with authentication function according to claim 2, characterized in that, The MCU control chip is responsible for coordinating the data processing of each module. The FIDO2.0 authentication chip has a built-in security chip, which is used to locally store the user's private key and authentication information, and to perform identity authentication in conjunction with the FIDO2.0 protocol. The NFC communication chip is used for short-range communication with mobile terminals, access control systems, and laptops that have NFC functionality.

4. A mouse device with authentication function according to claim 3, characterized in that, The fingerprint recognition module (2) includes a capacitive fingerprint sensor and an ASIC processing chip, and the ASIC processing chip has a built-in liveness detection algorithm for verifying the authenticity of the fingerprint.

5. A mouse device with authentication function according to claim 4, characterized in that, The MCU control chip runs a multi-tasking operating system based on RTOS, including fingerprint recognition tasks, NFC communication tasks, FIDO2.0 protocol processing tasks, and low-power management tasks. Synchronization between tasks is achieved through message queues.

6. A mouse device with authentication function according to claim 5, characterized in that, The mouse body has a replaceable battery compartment inside, and a wireless charging coil is installed inside the battery compartment. The wireless charging coil is connected to the charging management chip on the PCB motherboard (11). The top cover (1) has an interface (9) on its side, which is connected to the wireless charging coil for connecting external devices. The wireless charging coil supports Qi standard wireless charging.

7. A mouse device with authentication function according to claim 2, characterized in that, The electromagnetic shielding structure includes a grounding copper foil (12) laid on the bottom layer of the PCB motherboard (11) at the position corresponding to the annular path of the NFC antenna (15). The grounding copper foil (12) is connected to the grounding layer inside the PCB motherboard (11) through a via. A flexible ferrite sheet (14) is provided between the NFC antenna (15) and the PCB motherboard (11). The flexible ferrite sheet (14) covers the area of ​​the NFC antenna (15). The width of the grounding copper foil (12) is greater than the width of the flexible ferrite sheet (14). The bottom inner wall of the bottom shell (5) is coated with a conductive paint layer (16). The grounding copper foil (12) is electrically connected to the conductive paint layer (16) through a metal spring (13).

8. A mouse device with authentication function according to claim 7, characterized in that, The bottom of the bottom shell (5) has an annular groove (17) and a protective net (7) is installed on the annular groove (17) to protect the NFC antenna (15) and the flexible ferrite sheet (14). The flexible ferrite sheet (14), the NFC antenna (15) and the protective net (7) are installed in the annular groove (17) from top to bottom. The bottom of the bottom shell (5) has at least three support pads (6) and the support pads (6) are made of polytetrafluoroethylene material and are evenly distributed on the bottom edge of the bottom shell (5).

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