Waterproof fingerprint identification automobile door handle

Abstract

The utility model discloses a waterproof fingerprint identification automobile door handle, and belongs to the technical field of automobile accessories. Comprising a handle shell, a touch awakening module and a fingerprint recognition module, and a mounting cavity is formed in the handle shell; the touch awakening module comprises an awakening sensor and an awakening circuit, and the awakening sensor is connected with the awakening circuit; the fingerprint identification module comprises an ultrasonic sensor and a fingerprint identification algorithm chip, and the ultrasonic sensor is connected with the fingerprint identification algorithm chip; the wake-up circuit is connected with the fingerprint identification algorithm chip; a recognition cover plate is arranged on one side of the mounting cavity, the touch awakening module and the fingerprint recognition module are arranged in the mounting cavity in a sealed mode through the recognition cover plate, a recognition area is arranged on the recognition cover plate, and the awakening sensor and the ultrasonic sensor face the recognition area; the technical problems that according to a traditional waterproof fingerprint recognition automobile door handle, a waterproof cover is inconvenient to open and close, and power consumption is high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a waterproof fingerprint recognition automobile door handle. Background Art

[0002] With the popularization of automobile intelligent technology, biometric technology has gradually become more common in the automobile field. Among them, the fingerprint recognition technology of the door handle is also one of the application directions of the cost door intelligentization. The utility model patent with the publication number CN209757051U discloses a waterproof and dustproof fingerprint type automobile door handle. When the user does not need to open the door, the waterproof protective cover can hide the fingerprint identifier inside the door handle. The waterproof protective cover is movable and adjusted to cover the top of the fingerprint identifier to form a protective effect, thereby effectively avoiding dust and rain from directly and long-term contact with the fingerprint identifier, and prolonging the working life of the fingerprint module. When it needs to be opened, the user places the finger on the surface of the fingerprint identifier, and then electrically connects to the fingerprint transmission module on the microprocessor, and then the fingerprint information is fed back to the microprocessor through the fingerprint sensor in the fingerprint transmission module. When the fingerprint information is correct, the door is opened, and the door handle is effectively opened by fingerprint, which improves the user's convenience. However, the above-mentioned existing car door handle adopts a cover-type solution for waterproofing. When using it, it is necessary to open the waterproof protective cover and then cover it back in place, which is not convenient to use; and because it is not equipped with a wake-up circuit, its fingerprint recognition module needs to be in a working state for a long time, resulting in high power consumption, and also causing the fingerprint recognition module to be easily damaged and fail due to the working intensity, thus reducing the service life. Based on the above, it is necessary to invent a waterproof fingerprint recognition car door handle. Summary of the invention

[0003] The purpose of the utility model is to provide a waterproof fingerprint recognition automobile door handle in view of the above problems, so as to solve the technical problems that the waterproof cover of the traditional waterproof fingerprint recognition automobile door handle is inconvenient to open and close and has high power consumption.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0005] A waterproof fingerprint recognition car door handle, comprising a handle shell, a touch wake-up module and a fingerprint recognition module. An installation cavity is arranged inside the handle shell; the touch wake-up module includes a wake-up sensor and a wake-up circuit, and the wake-up sensor is connected to the wake-up circuit; the fingerprint recognition module includes an ultrasonic sensor and a fingerprint recognition algorithm chip, and the ultrasonic sensor is connected to the fingerprint recognition algorithm chip; the wake-up circuit is connected to the fingerprint recognition algorithm chip; a recognition cover plate is arranged on one side of the installation cavity, and the touch wake-up module and the fingerprint recognition module are hermetically installed in the installation cavity by the recognition cover plate. An identification area is arranged on the recognition cover plate, and the wake-up sensor and the ultrasonic sensor face the identification area; the wake-up sensor can detect whether the identification area is covered by a finger, and the wake-up circuit triggers the fingerprint recognition module to recognize the fingerprint after receiving that the wake-up sensor is covered by a finger.

[0006] Furthermore, an annular sealing groove is arranged on the outer periphery of the opening of the installation cavity, a sealing ring is installed in the annular sealing groove, and the recognition cover plate is pressed on the sealing ring.

[0007] Furthermore, the wake-up sensor is a capacitance sensor.

[0008] Furthermore, the handle shell further includes a wiring hole, and the wiring hole communicates with the installation cavity.

[0009] Furthermore, the wake-up circuit uses an MCU microcontroller to construct a minimum system.

[0010] Furthermore, a plurality of clamping grooves are arranged on the handle shell, and a plurality of clamping buckles are arranged on the recognition cover plate. The clamping buckles can be inserted into the installation cavity and are clamped with the clamping grooves.

[0011] Due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0012] 1. When the present utility model is in use and the door handle is idle, in order to reduce the standby power consumption of the system, the fingerprint recognition module is in a power-off mode, while the touch wake-up module is in a sleep mode; when a fingerprint is placed on the recognition area, the wake-up sensor can detect whether the recognition area is covered by a finger. After the wake-up circuit receives that the wake-up sensor is covered by a finger, it triggers the fingerprint recognition module to recognize the fingerprint, enabling the ultrasonic sensor to obtain the fingerprint and compare it with the pre-set unlocking fingerprint in the fingerprint recognition algorithm chip. If the comparison is successful, a comparison success signal can be sent for the control of the vehicle computer, and then the system enters the sleep state, waiting for the next round of fingerprint comparison and recognition; if it fails, it closes and waits for the next round of fingerprint comparison and recognition. The ultrasonic sensor adopted by the present utility model can emit ultrasonic waves to the surface of the user's finger with an identification cover plate in between, and receive and analyze the echo signal. By utilizing the different densities between the skin on the fingerprint surface and the air, a 3D image is constructed to determine the characteristics of the fingerprint, enabling the touch wake-up module and the fingerprint recognition module to be hermetically installed in the handle housing, achieving the waterproof use of the touch wake-up module and the fingerprint recognition module. Based on the above, the present utility model solves the technical problems of the traditional waterproof fingerprint recognition automotive door handle, such as the inconvenient opening and closing of the waterproof cover and high power consumption.

[0013] 2. The present utility model is provided with an annular sealing groove and a sealing ring, facilitating the sealed installation of the identification cover plate. By setting a buckle and slot structure, it is fixed by the pressing-down scheme, and at the same time, the identification cover plate can be pressed on the sealing ring, with simple and convenient operation. By setting a wiring hole, it is convenient for the wiring between the installation cavity and the vehicle computer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the three-dimensional structure diagram of the present utility model;

[0015] Figure 2 is the three-dimensional structure diagram of the internal structure of the handle housing of the present utility model;

[0016] Figure 3 is the three-dimensional structure diagram of the identification cover plate of the present utility model.

[0017] In the drawings, 1 - handle housing, 2 - touch wake-up module, 3 - fingerprint recognition module, 4 - identification cover plate, 11 - installation cavity, 12 - annular sealing groove, 13 - wiring hole, 14 - slot, 21 - wake-up sensor, 22 - wake-up circuit, 31 - ultrasonic sensor, 32 - fingerprint recognition algorithm chip, 41 - recognition area, 42 - buckle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further describes the specific implementation of the utility model with reference to the drawings.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0020] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0022] Please refer to Figures 1 to 3, A waterproof fingerprint recognition car door handle, which includes a handle shell 1, a touch wake-up module 2 and a fingerprint recognition module 3. An installation cavity 11 is arranged inside the handle shell 1; the touch wake-up module 2 includes a wake-up sensor 21 and a wake-up circuit 22, and the wake-up sensor 21 is connected to the wake-up circuit 22; the fingerprint recognition module 3 includes an ultrasonic sensor 31 and a fingerprint recognition algorithm chip 32, and the ultrasonic sensor 31 is connected to the fingerprint recognition algorithm chip 32; the wake-up circuit 22 is connected to the fingerprint recognition algorithm chip 32; a recognition cover plate 4 is arranged on one side of the installation cavity 11, and the recognition cover plate 4 seals and installs the touch wake-up module 2 and the fingerprint recognition module 3 in the installation cavity 11. A recognition area 41 is arranged on the recognition cover plate 4, and the wake-up sensor 21 and the ultrasonic sensor 31 face the recognition area 41; the wake-up sensor 21 can detect whether the recognition area 41 is covered by a finger, and after the wake-up circuit 22 receives that the wake-up sensor 21 is covered by a finger, it triggers the fingerprint recognition module 3 to recognize the fingerprint. Specifically, the wake-up circuit 22 uses an MCU microcontroller to build a minimum system. The MCU microcontroller supplies power to the fingerprint recognition module 3 by controlling the power switch. The MCU microcontroller communicates with the fingerprint recognition module 3 through a data line to transmit control signals. After receiving the power-on signal, the fingerprint recognition module 3 starts to initialize the fingerprint recognition algorithm chip 32. After the initialization is completed, the ultrasonic sensor 31 emits ultrasonic waves to the surface of the user's finger and receives and analyzes the echo signal. A 3D image is constructed using the different densities between the fingerprint surface skin and the air to determine the characteristics of the fingerprint. These characteristic data are transmitted to the fingerprint recognition algorithm chip 32 for processing and compared with the information already existing on the terminal. If the fingerprint matches successfully, the fingerprint recognition module 3 will send a recognition success signal to the car door controller. After receiving this signal, the car door controller performs the operation of unlocking the car door. If the fingerprint match fails, no action occurs.

[0023] In this embodiment, an annular sealing groove 12 is arranged on the outer periphery of the opening of the installation cavity 11. A sealing ring (not shown in the figure) is installed in the annular sealing groove 12, and the recognition cover plate 4 is pressed on the sealing ring (not shown in the figure). It is convenient for the recognition cover plate 4 to be sealed and installed. Through the structure of the buckle 42 and the card slot 14, it is fixed by the pressing-down scheme. At the same time, the recognition cover plate 4 can be pressed on the sealing ring (not shown in the figure), and the operation is simple and convenient.

[0024] In this embodiment, the wake-up sensor 21 is a capacitive sensor. The capacitive sensor can detect the capacitance threshold when a finger is placed on the recognition area 41. When the capacitance threshold matches, the wake-up circuit 22 powers on the fingerprint recognition module 3.

[0025] In this embodiment, the handle shell 1 further includes a wiring hole 13, and the wiring hole 13 communicates with the installation cavity 11. By providing the wiring hole 13, it is convenient for the wiring between the installation cavity 11 and the vehicle machine.

[0026] In this embodiment, a plurality of card slots 14 are provided on the handle housing 1, and a plurality of buckles 42 are provided on the identification cover plate 4. The buckles 42 can be inserted into the installation cavity 11 and engaged with the card slots 14.

[0027] The above description is a detailed description of the preferred and feasible embodiment of the present invention. However, the embodiment is not intended to limit the scope of the patent application of the present invention. Any equivalent changes or modifications made under the technical spirit disclosed by the present invention shall fall within the scope of the patent covered by the present invention.

Claims

1. A waterproof fingerprint recognition car door handle, characterized by: It includes a handle shell, a touch wake-up module and a fingerprint recognition module, and an installation cavity is arranged in the handle shell; the touch wake-up module includes a wake-up sensor and a wake-up circuit, and the wake-up sensor is connected to the wake-up circuit; the fingerprint recognition module includes an ultrasonic sensor and a fingerprint recognition algorithm chip, and the ultrasonic sensor is connected to the fingerprint recognition algorithm chip; the wake-up circuit is connected to the fingerprint recognition algorithm chip; an identification cover is arranged on one side of the installation cavity, and the identification cover seals the touch wake-up module and the fingerprint recognition module in the installation cavity, and an identification area is arranged on the identification cover, and the wake-up sensor and the ultrasonic sensor face the identification area; the wake-up sensor can detect whether the identification area is covered by a finger, and the wake-up circuit triggers the fingerprint recognition module to recognize the fingerprint after receiving the wake-up sensor is covered by a finger.

2. The waterproof fingerprint recognition automobile door handle according to claim 1, characterized in that: An annular sealing groove is arranged on the opening periphery of the installation cavity, a sealing ring is arranged in the annular sealing groove, and the identification cover plate is pressed on the sealing ring.

3. The waterproof fingerprint recognition automobile door handle according to claim 1, characterized in that: The wake-up sensor is a capacitive sensor.

4. The waterproof fingerprint recognition automobile door handle according to claim 1, characterized in that: The handle shell further includes a wiring hole, and the wiring hole is communicated with the mounting cavity.

5. The waterproof fingerprint recognition automobile door handle according to claim 1, characterized in that: The wake-up circuit uses an MCU microcontroller to construct a minimum system.

6. The waterproof fingerprint recognition automobile door handle according to claim 1, characterized in that: The handle shell is provided with a plurality of card slots, the identification cover is provided with a plurality of buckles, and the buckles can be inserted into the installation cavity and snap-fitted with the card slots.

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