A biometric feature acquisition device

Abstract

This application relates to the field of biometric feature acquisition technology, specifically a biometric feature acquisition device, including an installation structure. The installation structure is equipped with a first biometric feature acquisition device and a second biometric feature acquisition device. The installation structure also includes a shielding mechanism, and a linkage component is provided between the second biometric feature acquisition device and the shielding mechanism. This biometric feature acquisition device, through its linkage design, ensures that the precision acquisition camera is always sealed and protected by the shielding plate when not in use, effectively preventing dust, moisture, fingerprint contamination, and physical scratches, significantly reducing maintenance frequency and failure rate. Furthermore, the entire authentication process must be completed through a real, continuous physical pressing action, achieving efficient liveness detection and effectively preventing attacks using photos, videos, or static molds. Simultaneously, the linkage mechanism increases the complexity and cost of fraud, achieving superior security and anti-counterfeiting advantages.

Description

Technical Field

[0001] This application relates to the field of biometric feature acquisition technology, and in particular to a biometric feature acquisition device. Background Technology

[0002] With the development of information technology, people are paying more and more attention to their own information security. Intelligent personal identification is a highly reliable biometric identification method at present. Iris recognition uses iris features as an object of personal identification and can be applied to security equipment or places that require high confidentiality.

[0003] With the increasing demands for information security, single biometric technologies such as fingerprints and facial recognition are no longer sufficient to meet the application requirements of high-security scenarios due to potential for forgery risks, poor environmental adaptability, or accuracy limitations. Therefore, "multimodal biometrics" technology, which integrates two or more biometric features, has become a development trend, significantly improving recognition accuracy and anti-counterfeiting capabilities.

[0004] Among these, the combination of palm and eye features has attracted significant attention. Palm vein features are located beneath the skin, making them difficult to replicate, and the collection process is non-contact and hygienic; eye features, on the other hand, possess extremely high uniqueness and stability, and are hailed as the "gold standard" of biometrics. Combining the two could theoretically create an extremely reliable identity verification system.

[0005] However, in existing technologies, the acquisition of hand and eye features typically employs one of two methods: Separate devices: Two independent physical devices are used to acquire hand and eye features separately. Users need to perform the operation at two different locations sequentially, resulting in a cumbersome process, large space requirements, and an inconsistent user experience. Integrated but independent acquisition modules: Although two acquisition modules are integrated into the same body, they are physically independent in terms of structure and operational logic. That is, the eye detection area and the hand detection area are two side-by-side or adjacent windows that are always exposed. This not only poses a risk of eye sensors being easily contaminated and damaged, leading to high maintenance costs, but also reduces the overall anti-counterfeiting capability of the system. Therefore, a biometric feature acquisition device is proposed to address the problems mentioned above. Summary of the Invention

[0006] To address the shortcomings of existing technologies and improve data collection quality, this application provides a biometric feature collection device that offers advantages such as high security and effective anti-counterfeiting, thus resolving the problems existing in the aforementioned background technologies.

[0007] This application provides a biometric feature acquisition device, which adopts the following technical solution:

[0008] A biometric feature acquisition device includes an installation structure, on which a first biometric feature acquisition device and a second biometric feature acquisition device are installed. The installation structure is also provided with a blocking mechanism. A linkage component is provided between the second biometric feature acquisition device and the blocking mechanism, and the first biometric feature acquisition device is used in conjunction with the linkage component.

[0009] The acquisition device mainly includes an acquisition camera, a telescopic shaft, and an adjustment sleeve. The adjustment sleeve is fitted onto the outer surface of the telescopic shaft. The acquisition camera is fixed to one end of the telescopic shaft. A guide shaft is installed on the outer surface of the telescopic shaft. A guide groove with a spiral shape is opened inside the adjustment sleeve. A transmission component connected to the linkage component is provided on the outside of the adjustment sleeve.

[0010] The second acquisition device includes a palm recognition module and a trigger block, and a receiving seat that abuts against the trigger block is installed on one side of the palm recognition module;

[0011] The shielding mechanism includes an annular seat, a rotating ring rotatably mounted on the inner side of the annular seat, two shielding plates slidably disposed on the inner side of the annular seat, and guide wheels are mounted on the outer walls of the two shielding plates. The rotating ring has guide grooves inside that roll with the two guide wheels.

[0012] Optionally, the mounting structure includes a mounting housing, the interior of which has a storage slot, and a sealing plate that covers the storage slot is detachably mounted on the front of the mounting housing. The sealing plate has a collection hole corresponding to the collection camera inside, and a protective pad is embedded on the inner side of the collection hole.

[0013] Optionally: the first acquisition device is installed inside the mounting housing, and the acquisition camera in the first acquisition device extends into the storage slot; the second acquisition device is installed in the storage slot, and the palm recognition module in the second acquisition device extends to the outside of the sealing plate.

[0014] Optionally: a first reset spring is installed between the receiving seat and the inner wall of the storage slot; the trigger block is fixed to the inner wall of the storage slot; and a lubrication mechanism is provided inside the storage slot to cooperate with the shielding mechanism and the linkage component; wherein the lubrication mechanism consists of an infusion component and a liquid storage structure.

[0015] Optionally, the linkage component includes a slide block slidably installed inside the storage slot, a connecting arm hinged between the slide block and the receiving seat, a guide plate installed on one side of the slide block, a rack two provided on one side of the guide plate, a connecting shaft one and a connecting shaft two fixed on the outer wall of the rack two, wherein the connecting shaft one is connected to the transmission component, a guide wheel two is rotatably installed at the end of the connecting shaft two, and a guide groove three is opened inside the guide plate to roll and cooperate with the guide wheel two, and the guide groove three is inclined.

[0016] Optionally: There are two slides and two connecting arms, and the slide away from the guide plate is used in conjunction with the infusion assembly. A guide rod that penetrates the interior of the rack is fixed between the inner walls of opposite sides of the placement slot. A buffer spring is installed between the inner wall of the placement slot and the outer wall of the rack.

[0017] Optionally, the transmission component includes a transmission gear fixed to the outer surface of the adjusting sleeve, a rack externally meshing with the transmission gear, an actuating plate mounted on the outer surface of the rack, the actuating plate being slidably connected to the back of the mounting housing, and a connecting shaft extending to the back of the mounting housing and abutting against the outer side of the actuating plate.

[0018] Optionally: The shielding mechanism is installed inside the storage slot, wherein two shielding plates are distributed vertically to shield the collection hole, and a transmission gear two is installed on the outer surface of the rotating ring, the transmission gear two meshing with the rack two.

[0019] Optional: The infusion assembly includes an infusion component comprising a pump cylinder mounted on one of the slides, a piston slidably disposed inside the pump cylinder, a connecting rod mounted at one end of the piston, and a roller rotatably mounted at the other end of the connecting rod, a corrugated groove formed on the side wall of the storage slot to roll with the roller, a return spring two mounted between the piston and the pump cylinder, two check valves mounted on the outer wall of the pump cylinder, each check valve having an infusion tube mounted at its end, and the two infusion tubes being connected to the liquid storage structure and the slide respectively.

[0020] Optionally: The liquid storage structure includes a liquid storage cylinder fixed inside the storage tank, a stirring rod rotatably installed inside the liquid storage cylinder, the top end of the stirring rod extending to the outside of the liquid storage cylinder, and a transmission gear three meshing with the transmission gear two fixed at the end of the stirring rod.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. This invention, through a linkage design, ensures that the precision acquisition camera is always sealed and protected by the shield when not in use, effectively preventing dust, moisture, fingerprint contamination, and physical scratches, greatly reducing maintenance frequency and failure rate. Furthermore, the entire authentication process must be completed through a real and continuous physical pressing action, achieving efficient liveness detection and effectively preventing attacks using photos, videos, or static molds. At the same time, the linkage mechanism increases the complexity and cost of fraud, achieving the advantages of excellent security and anti-counterfeiting.

[0023] 2. In this invention, the acquisition camera in the acquisition device can be adjusted in position by extending and retracting the telescopic shaft through a linkage mechanism. This allows it to find the optimal acquisition position according to different acquisition environments and user needs, thereby improving the accuracy of biometric acquisition. The linkage mechanism ensures that the user's eyes and palms are in the best and most consistent position relative to the sensor during each acquisition, thus providing a stable and high-quality input signal for the acquisition camera and palm recognition module, thereby guaranteeing high recognition accuracy and speed.

[0024] 3. This invention features automatic lubrication, which is triggered by the normal use of the device itself without manual intervention. It can maintain the smoothness of transmission components for a long time, reduce wear, and the lubrication mechanism is designed to provide timely lubrication for moving parts such as linkage components, reduce friction and wear between components, ensure the smoothness and stability of the device during long-term operation, reduce the failure rate, and thus extend the service life of the equipment and reduce the maintenance cost throughout the entire life cycle. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the installation structure separation in this application;

[0026] Figure 2 This is a perspective view of the installation structure of this application;

[0027] Figure 3 This is a rear view of the data acquisition device used in this application;

[0028] Figure 4 This is a cross-sectional view of this application;

[0029] Figure 5 This is a schematic diagram of the shielding mechanism in this application;

[0030] Figure 6 This is a schematic diagram of the infusion assembly of this application;

[0031] Figure 7 This is a bottom view of the application;

[0032] Figure 8 This application Figure 5 A magnified structural diagram of structure A is shown below;

[0033] Figure 9 This is a schematic diagram of the infusion device in this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Installation structure; 11. Mounting housing; 12. Storage slot; 13. Sealing plate; 14. Acquisition hole; 15. Protective pad; 2. Acquisition device one; 21. Acquisition camera; 22. Telescopic shaft; 23. Adjusting sleeve; 24. Guide shaft; 25. Guide groove one; 26. Transmission gear one; 27. Rack one; 28. Actuating plate; 3. Acquisition device two; 31. Palm recognition module; 32. Trigger block; 33. Receiving seat; 34. First return spring; 4. Obstruction mechanism; 41. Annular seat; 42. Rotating ring; 43. Obstruction plate; 44. Guide wheel one; 45. Guide groove II; 46. Transmission Gear II; 5. Infusion Assembly; 51. Infusion Component; 511. Pump Cylinder; 512. Piston; 513. Return Spring II; 514. Check Valve; 515. Infusion Tube; 52. Corrugated Groove; 53. Connecting Rod; 54. Roller; 6. Liquid Storage Structure; 61. Liquid Storage Cylinder; 62. Stirring Rod; 63. Transmission Gear III; 7. Linkage Assembly; 71. Slide; 72. Guide Plate; 73. Connecting Arm; 74. Rack II; 75. Guide Rod; 76. Buffer Spring; 77. Connecting Shaft I; 78. Connecting Shaft II; 79. Guide Wheel II; 710. Guide Groove III. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-9 This application will be described in further detail.

[0037] This application discloses a biometric feature acquisition device. Please refer to... Figures 1-9 A biometric feature acquisition device includes a mounting structure 1, which comprises a mounting housing 11. The mounting housing 11 has an internal storage slot 12, and a sealing plate 13 is detachably mounted on the front of the mounting housing 11 to cover the storage slot 12. Specifically, the mounting housing 11 serves as the basic frame of the entire biometric feature acquisition device, providing a stable mounting position and support structure for the various components within the device. It can withstand certain external forces, protecting the internal precision acquisition equipment and linkage components 7 from physical damage such as external collisions and compressions, ensuring the device maintains structural integrity and stability under various usage environments. A protective pad 15 is embedded inside the acquisition hole 14, serving as a buffer and protection. When a user uses the device for biometric feature acquisition, they may accidentally bump into the edge of the acquisition hole 14. The protective pad 15 reduces the damage to the user and the device from such collisions, improving comfort and safety. Furthermore, the protective pad 15 is removable for subsequent replacement. The mounting housing 11 is provided with mounting blocks for installation.

[0038] In this embodiment, the installation structure 1 is provided with a biometric feature collection device 2 and a biometric feature collection device 3. The installation structure 1 is also provided with a shielding mechanism 4. A linkage component 7 is provided between the biometric feature collection device 3 and the shielding mechanism 4, and the biometric feature collection device 2 and the linkage component 7 are used in a linkage manner.

[0039] To achieve eye biometric data acquisition, acquisition device 2 mainly includes an acquisition camera 21, a telescopic shaft 22, and an adjustment sleeve 23. The adjustment sleeve 23 is fitted onto the outer surface of the telescopic shaft 22. The acquisition camera 21 is fixed to one end of the telescopic shaft 22. A guide shaft 24 is installed on the outer surface of the telescopic shaft 22. The interior of the adjustment sleeve 23 has a spiral-shaped guide groove 25. Specifically, the sealing plate 13 has an acquisition hole 14 corresponding to the acquisition camera 21. The acquisition hole 14 is located inside the sealing plate 13 and corresponds to the acquisition camera 21. Its function is to provide a specific acquisition channel for the acquisition camera 21, enabling the camera to accurately capture the biometric information to be identified, such as facial features. It should be noted that the size and shape of the acquisition hole 14 can be designed according to different acquisition needs to ensure the accuracy and effectiveness of the acquisition. Acquisition device 2 is installed inside the mounting housing 11, and the acquisition camera 21 in acquisition device 2 extends into the storage slot 12. Acquisition device 3 is installed inside the storage slot 12.

[0040] To achieve calibration and adjustment, the external part of the adjustment sleeve 23 is equipped with a transmission component connected to the linkage component 7. The adjustment sleeve 23 is driven to rotate by the linkage component 7. Since the spiral guide groove 25 inside the adjustment sleeve 23 cooperates with the guide shaft 24 fixed on the telescopic shaft 22, the rotation of the adjustment sleeve 23 is converted into the linear motion of the telescopic shaft 22, which causes the acquisition camera 21 to extend forward and pass through the opened acquisition hole 14 to reach the preset acquisition position. The spiral motion itself also plays a role in finely adjusting the focal length.

[0041] To further improve the data collection effect, the second data collection device 3 includes a palm recognition module 31 and a trigger block 32. A receiving seat 33 is installed on one side of the palm recognition module 31 to abut against the trigger block 32; and the palm recognition module 31 in the second data collection device 3 extends to the outside of the sealing plate 13. Specifically, a first reset spring 34 is installed between the receiving seat 33 and the inner wall of the storage tank 12, the trigger block 32 is fixed on the inner wall of the storage tank 12, and a lubrication mechanism is provided inside the storage tank 12 to cooperate with the shielding mechanism 4 and the linkage component 7; wherein, the lubrication mechanism consists of an infusion component 5 and a liquid storage structure 6.

[0042] It should be noted that the palm recognition module 31 collects palm vein or palm print information, while the camera 21 collects iris or retina information, so that the two-factor biometric data are acquired simultaneously or almost simultaneously and sent to the backend system for comparison and verification.

[0043] To protect the data acquisition device 2, the shielding mechanism 4 includes an annular seat 41. A rotating ring 42 is rotatably mounted on the inner side of the annular seat 41. Two shielding plates 43 are slidably arranged on the inner side of the annular seat 41, and guide wheels 44 are mounted on the outer walls of both shielding plates 43. The rotating ring 42 has guide grooves 45 inside that roll with the two guide wheels 44. Through the rolling engagement of the guide grooves 45 inside the rotating ring 42 with the guide wheels 44 on the shielding plates 43, its rotational motion is converted into the linear sliding motion of the shielding plates 43. This transmission method cleverly utilizes the mechanical structure to achieve precise control of the shielding plates 43, allowing the two shielding plates 43 to move up and down along a predetermined trajectory, thereby opening and blocking the data acquisition hole 14. The shielding mechanism 4 is installed inside the storage slot 12, where the two shielding plates 43 are distributed vertically to block the data acquisition hole 14, and a transmission gear 46 is mounted on the outer surface of the rotating ring 42. It should be noted that both the annular seat 41 and the rotating ring 42 are hollow inside to allow the acquisition camera 21 to perform data acquisition.

[0044] With two shielding plates 43 positioned vertically, the collection port 14 can be completely covered, preventing dust, moisture, foreign objects, etc., from entering the storage compartment 12 and protecting the collection device 2 from contamination and damage. When the device is not in use, the shielding plates 43 can remain in a shielding state, providing a relatively closed and safe environment for the collection device and extending its service life.

[0045] To achieve synchronous acquisition of the palm and iris, the linkage component 7 includes a slide 71 slidably installed inside the storage slot 12. A connecting arm 73 is hinged between the slide 71 and the receiving seat 33. A guide plate 72 is installed on one side of the slide 71. A rack 74 is provided on one side of the guide plate 72. A connecting shaft 77 and a connecting shaft 78 are fixed on the outer wall of the rack 74. The connecting shaft 77 is connected to the transmission component. A guide wheel 79 is rotatably installed at the end of the connecting shaft 78. A guide groove 710 is opened inside the guide plate 72 to roll with the guide wheel 79. The guide groove 710 is inclined. A transmission gear 46 meshes with the rack 74.

[0046] Specifically, there are two slides 71 and two connecting arms 73. The slide 71, which is away from the guide plate 72, is used in conjunction with the infusion assembly 5. A guide rod 75 that penetrates the inside of the rack 74 is fixed between the inner walls of opposite sides of the storage slot 12. A buffer spring 76 is installed between the inner wall of the storage slot 12 and the outer wall of the rack 74.

[0047] The transmission component in this embodiment includes a transmission gear 26 fixed to the outer surface of the adjusting sleeve 23, a rack 27 externally meshing with the transmission gear 26, and a toggle plate 28 mounted on the outer surface of the rack 27. The toggle plate 28 is slidably connected to the back of the mounting housing 11, and a connecting shaft 77 extends to the back of the mounting housing 11 and abuts against the outer side of the toggle plate 28. In use, the connecting shaft 77 is connected to the transmission component, specifically abutting against the outer side of the toggle plate 28. When the transmission gear 26 rotates, it drives the rack 27 and the toggle plate 28 to move linearly. The toggle plate 28 pushes the connecting shaft 77, thereby causing the rack 74 to move. This can integrate and transmit the movement of different components, realize synchronous control of multiple acquisition devices, and ensure that the palm and iris acquisition devices are acquired synchronously at the appropriate time and position, thus improving acquisition efficiency and accuracy.

[0048] To ensure the stable opening and closing of the shielding mechanism 4, the infusion assembly 5 includes an infusion component 51. The infusion component 51 includes a pump cylinder 511 mounted on one of the slides 71. A piston 512 is slidably disposed inside the pump cylinder 511. A connecting rod 53 is installed at the end of the piston 512, and a roller 54 is rotatably mounted at the other end of the connecting rod 53. A wave groove 52 is provided on the side wall of the storage slot 12 to roll and cooperate with the roller 54. A return spring 513 is installed between the piston 512 and the pump cylinder 511. Two check valves 514 are installed on the outer wall of the pump cylinder 511. An infusion tube 515 is installed at the end of each of the two check valves 514. The two infusion tubes 515 are respectively connected to the liquid storage structure 6 and the slide 71. Specifically, when the slide 71 moves due to the action of the linkage assembly 7, it will drive the pump cylinder 511 and the piston 512 to move. The connecting rod 53 and roller 54 at the end of piston 512 roll in cooperation with the corrugated groove 52 on the side wall of the storage slot 12. The special shape of the corrugated groove 52 causes the roller 54 to drive the connecting rod 53 and piston 512 to make regular reciprocating motion during rolling, providing a stable and continuous power source for the opening and closing of the blocking mechanism 4, avoiding the problem of the blocking mechanism 4 not opening and closing smoothly or getting stuck due to unstable power. It should be noted that the infusion tube 515 connected to the liquid storage structure 6 is a flexible tube.

[0049] In this embodiment, the liquid storage structure 6 includes a liquid storage cylinder 61 fixed inside the storage tank 12. A stirring rod 62 is rotatably mounted inside the liquid storage cylinder 61. The top end of the stirring rod 62 extends to the outside of the liquid storage cylinder 61, and a transmission gear 63 that meshes with the transmission gear 46 is fixed at the end of the stirring rod 62. When the transmission gear 46 rotates and is associated with the opening and closing of the shielding mechanism 4, the stirring rod 62 will rotate. The rotation of the stirring rod 62 can stir the liquid in the liquid storage cylinder 61, prevent the components in the liquid from settling or separating, and ensure the uniformity of the liquid. This is very important for some liquids that require a specific concentration or uniform composition, as it can ensure that the liquid delivered to the relevant parts of the slide 71 always has good performance, thereby maintaining the stable operation of the device.

[0050] Combined with appendix Figures 1-9 The working principle of the above embodiments is as follows:

[0051] The user brings their face close to the device and aligns their eyes with the acquisition hole 14 on the sealing plate 13. At this time, the acquisition camera 21 is in a retracted state and is protected by two closed shields 43 to prevent dust and contact. The user places their palm on the palm recognition module 31 located outside the sealing plate 13 and applies downward pressure naturally. The shielding mechanism 4 is activated by pressing the pressure.

[0052] The palm pressure pushes the palm recognition module 31 and the receiving seat 33 below it into the mounting housing 11, compressing the first return spring 34. The downward movement of the receiving seat 33 is converted into horizontal sliding of the two slides 71 moving in opposite directions through the hinged connecting arm 73.

[0053] One of the slide blocks 71 drives the guide plate 72 to move. The inclined guide groove 710 on the guide plate 72 interacts with the guide wheel 79, converting the horizontal motion into the linear motion of the rack 74. The rack 74 drives the transmission gear 46 meshing with it to rotate, thereby driving the rotating ring 42 to rotate. The spiral guide groove 45 inside the rotating ring 42 pushes the upper and lower guide wheels 44, causing the two baffle plates 43 to slide along the annular seat 41 to the upper and lower sides, opening the collection hole 14. When the rack 74 moves, The connecting shaft 77 at its end pushes the actuating plate 28 and the rack 27 to move. The rack 27 drives the transmission gear 26 to rotate, which in turn drives the adjusting sleeve 23 to rotate. Since the spiral guide groove 25 inside the adjusting sleeve 23 cooperates with the guide shaft 24 fixed on the telescopic shaft 22, the rotation of the adjusting sleeve 23 is converted into the linear motion of the telescopic shaft 22, which causes the acquisition camera 21 to extend forward and pass through the opened acquisition hole 14 to reach the preset acquisition position. The spiral motion itself also plays the role of finely adjusting the focus.

[0054] Finally, at the moment when the cover plate 43 is fully opened and the acquisition camera 21 is extended into place, the system is activated simultaneously. The palm recognition module 31 collects palm vein or palm print information, while the acquisition camera 21 collects iris or retina information, so that the two-factor biometric data are acquired simultaneously or almost simultaneously and sent to the back-end system for comparison and verification.

[0055] In addition, when the other slide 71 slides horizontally, it will drive the infusion assembly 5 to work, and the pump cylinder 511 fixed on the slide 71 will move accordingly. The piston 512 inside will reciprocate because the roller 54 at the end rolls in the fixed wave groove 52. The reciprocating motion of the piston 512 is like a small pump, which pumps out the lubricating liquid in the reservoir 61 in a directional and quantitative manner through two check valves 514 and infusion pipe 515, and drips it onto the guide rail of the slide 71 that needs lubrication, so as to ensure the smooth opening and closing of the shielding mechanism 4.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A biometric feature acquisition device, characterized in that: The device includes an installation structure (1), on which a biometric feature acquisition device 1 (2) and a biometric feature acquisition device 2 (3) are provided. The installation structure (1) is also provided with a shielding mechanism (4). A linkage component (7) is provided between the biometric feature acquisition device 2 (3) and the shielding mechanism (4), and the biometric feature acquisition device 1 (2) and the linkage component (7) are used in a linkage manner. The installation structure (1) includes an installation housing (11), and a storage slot (12) is provided inside the installation housing (11). The acquisition device 1 (2) mainly includes an acquisition camera (21), a telescopic shaft (22) and an adjustment sleeve (23). The adjustment sleeve (23) is fitted on the outer surface of the telescopic shaft (22). The acquisition camera (21) is fixed to one end of the telescopic shaft (22). A guide shaft (24) is installed on the outer surface of the telescopic shaft (22). A guide groove (25) with a spiral shape is opened inside the adjustment sleeve (23). A transmission component connected to the linkage component (7) is provided on the outside of the adjustment sleeve (23). The second acquisition device (3) includes a palm recognition module (31) and a trigger block (32). A receiving seat (33) that abuts against the trigger block (32) is installed on one side of the palm recognition module (31). The shielding mechanism (4) includes an annular seat (41), a rotating ring (42) is rotatably mounted on the inner side of the annular seat (41), and two shielding plates (43) are slidably arranged on the inner side of the annular seat (41). Guide wheels (44) are installed on the outer walls of the two shielding plates (43). The rotating ring (42) has a guide groove (45) inside that rolls with the two guide wheels (44). The linkage component (7) includes a slide (71) slidably installed inside the storage slot (12), a connecting arm (73) hinged between the slide (71) and the receiving seat (33), a guide plate (72) installed on one side of the slide (71), a rack (74) provided on one side of the guide plate (72), a connecting shaft (77) and a connecting shaft (78) fixed on the outer wall of the rack (74), wherein the connecting shaft (77) is connected to the transmission component, a guide wheel (79) is rotatably installed at the end of the connecting shaft (78), and a guide groove (710) is provided inside the guide plate (72) to roll with the guide wheel (79), and the guide groove (710) is inclined. The number of the slide (71) and the connecting arm (73) are both two. A guide rod (75) that penetrates the interior of the rack two (74) is fixed between the inner walls of opposite sides of the storage slot (12). A buffer spring (76) is installed between the inner wall of the storage slot (12) and the outer wall of the rack two (74). The transmission component includes a transmission gear (26) fixed to the outer surface of the adjusting sleeve (23), a rack (27) meshing with the transmission gear (26), a toggle plate (28) mounted on the outer surface of the rack (27), the toggle plate (28) being slidably connected to the back of the mounting housing (11), and the connecting shaft (77) extending to the back of the mounting housing (11) and abutting against the outer side of the toggle plate (28).

2. The biometric feature acquisition device according to claim 1, characterized in that: The front of the mounting housing (11) is detachably fitted with a sealing plate (13) to cover the storage slot (12). The sealing plate (13) has a collection hole (14) corresponding to the collection camera (21) inside, and a protective pad (15) is embedded on the inner side of the collection hole (14).

3. The biometric feature acquisition device according to claim 2, characterized in that: The first acquisition device (2) is installed inside the mounting housing (11), and the acquisition camera (21) in the first acquisition device (2) extends into the storage slot (12). The second acquisition device (3) is installed inside the storage slot (12), and the palm recognition module (31) in the second acquisition device (3) extends to the outside of the sealing plate (13).

4. The biometric feature acquisition device according to claim 2, characterized in that: A first reset spring (34) is installed between the receiving seat (33) and the inner wall of the storage slot (12). The trigger block (32) is fixed on the inner wall of the storage slot (12). The storage slot (12) is provided with a lubrication mechanism that works in conjunction with the shielding mechanism (4) and the linkage component (7). The lubrication mechanism consists of an infusion component (5) and a liquid storage structure (6).

5. The biometric feature acquisition device according to claim 4, characterized in that: The shielding mechanism (4) is installed inside the storage slot (12). Two shielding plates (43) are distributed vertically to shield the collection hole (14). A transmission gear (46) is installed on the outer surface of the rotating ring (42), and the transmission gear (46) meshes with the rack (74).

6. The biometric feature acquisition device according to claim 4, characterized in that: The infusion assembly (5) includes an infusion component (51), which includes a pump cylinder (511) mounted on one of the slides (71). A piston (512) is slidably disposed inside the pump cylinder (511). A connecting rod (53) is installed at the end of the piston (512), and a roller (54) is rotatably mounted at the other end of the connecting rod (53). A wave groove (52) is provided on the side wall of the storage slot (12) to roll and cooperate with the roller (54). A return spring (513) is installed between the piston (512) and the pump cylinder (511). Two check valves (514) are installed on the outer wall of the pump cylinder (511). An infusion tube (515) is installed at the end of each of the two check valves (514). The two infusion tubes (515) are respectively connected to the liquid storage structure (6) and the slide (71).

7. A biometric feature acquisition device according to claim 5, characterized in that: The liquid storage structure (6) includes a liquid storage cylinder (61) fixed inside the storage tank (12). A stirring rod (62) is rotatably installed inside the liquid storage cylinder (61). The top end of the stirring rod (62) extends to the outside of the liquid storage cylinder (61), and the end of the stirring rod (62) is fixed with a transmission gear three (63) that meshes with the transmission gear two (46).

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