Lens rotating structure for biological recognition

Abstract

The utility model provides a lens rotation structure for biological recognition, and relates to the technical field of biological recognition. The lens rotating structure for biological recognition comprises a base, a driving source, an iris camera and a transmission part, the driving source is fixed with the base, and the iris camera is arranged on one side of the orthographic projection of the driving source; and the transmission part is arranged on the base and is connected with the driving source so as to be driven by the driving source to carry the iris camera to rotate around a preset direction. The size of the overall structure in the length direction can be reduced, and the structure is more compact.

Description

Technical Field

[0001] The present application relates to the technical field of biometric identification, and in particular to a lens rotation structure for biometric identification. Background Art

[0002] The iris is the organ in the eyeball that regulates the pupil. It is ring-shaped when viewed from the outside, and contains many interlaced spots, filaments, crowns, stripes, crypts and other detailed features. In long-distance biometrics, a high-resolution iris camera is required to capture the details of the iris. However, high-resolution cameras are generally large in size, which makes the iris camera module larger, and in turn makes the entire iris recognition device larger, making it too bulky in many lightweight application scenarios and reducing the user experience.

[0003] In the related art, the drive motor and the rotating shaft are in a straight line, and the output shaft of the drive motor is connected to the rotating shaft through a coupling. The rotating shaft is connected to one end of the load frame, and the other end of the load frame is connected to the driven shaft. The iris camera is fixed on an adapter plate, and the adapter plate is fixed to the load frame, layer by layer.

[0004] However, the driving motor, rotating shaft, iris camera and driven shaft in the related technology are arranged in a line, which causes the length dimension of the overall structure to increase, making it bulky and clumsy in both mass and volume, reducing the user experience in lightweight application scenarios. Utility Model Content

[0005] In order to reduce the length dimension of the overall structure and make the structure more compact, the present application provides a lens rotation structure for biometric identification.

[0006] The present application provides a lens rotation structure for biometric identification, which adopts the following technical solution:

[0007] A lens rotation structure for biometric identification, comprising:

[0008] Base;

[0009] A driving source, the driving source being fixed to the base;

[0010] An iris camera, the iris camera being arranged on one side of the orthographic projection of the driving source;

[0011] A transmission member is disposed on the base and connected to the driving source so as to be able to carry the iris camera to rotate around a preset direction as driven by the driving source.

[0012] By adopting the above technical solution, when the driving source is started, the driving source drives the iris camera to rotate through the transmission member, thereby realizing the rotation of the iris camera in the pitch direction. The driving source and the iris camera are both located in the base, and the axis of the output end of the driving source is not colinear with the axis of rotation of the iris camera. Compared with the driving device in the related art that adopts the form of a straight-line motor direct drive, the present application can reduce the size of the overall structure in the length direction, reduce the volume of the module, and make the structure more compact.

[0013] Optionally, the base is U-shaped, comprising a bottom plate and side plates vertically connected to the bottom plate and arranged opposite to each other, the driving source is arranged in the base, and the transmission member is connected to one of the side plates.

[0014] By adopting the above technical solution, the driving source is located in the base, the base can provide support for the driving source, and the base can also protect the driving source.

[0015] Optionally, the lens rotation structure for biometric identification further includes a load frame, which is U-shaped, and opposite ends of the load frame are respectively connected to the two side plates, and the iris camera is fixed on the inner side of the load frame and faces the driving source.

[0016] By adopting the above technical solution, the iris camera is located in the load frame, and the load frame can protect the iris camera.

[0017] Optionally, the lens rotation structure for biometric identification also includes:

[0018] An active rotating shaft, the active rotating shaft is rotatably disposed on the base, and the transmission member is used to drive the active rotating shaft to rotate;

[0019] The driven rotating shaft is rotatably arranged on the base, and the load frame is connected to the active rotating shaft and the driven rotating shaft respectively.

[0020] By adopting the above technical solution, the load frame is rotatably connected to the base through the active rotating shaft and the driven rotating shaft, so that the rotating part has sufficient strength and precision.

[0021] Optionally, the iris camera is detachably connected to the load frame.

[0022] By adopting the above technical solution, the iris camera is detachably connected to the load frame, which can facilitate the installation or removal of the iris camera and facilitate the later inspection or replacement of the iris camera.

[0023] Optionally, the transmission member includes:

[0024] A driving gear, the driving gear being arranged at an output end of the driving source;

[0025] A driven gear is connected to the driving rotating shaft and meshes with the driving gear.

[0026] By adopting the above technical solution, when the output end of the driving source rotates, it can drive the driving gear to rotate, the driving gear drives the driven gear to rotate, and the driven gear drives the driving rotating shaft to rotate, thereby driving the iris camera to rotate at a pitch angle.

[0027] Optionally, the driving gear and the driven gear are respectively arranged in a sector shape.

[0028] By adopting the above technical solution, the sector-shaped driving gear and driven gear can reduce the weight and volume of the driving gear and the driven gear while ensuring transmission, thereby achieving lightweight.

[0029] Optionally, the driving gear and the driven gear are provided with weight-reducing holes.

[0030] By adopting the above technical solution, the weight-reducing holes can further reduce the weight of the driving gear and the driven gear while ensuring the structural strength of the driving gear and the driven gear, thereby achieving lightweight.

[0031] Optionally, the transmission member includes:

[0032] An active synchronous pulley, which is arranged at the output end of the driving source;

[0033] A driven synchronous pulley connected to the driving rotating shaft;

[0034] A synchronous belt is respectively sleeved on the driving synchronous pulley and the driven synchronous pulley.

[0035] By adopting the above technical solution, when the output end of the driving source rotates, it can drive the active synchronous pulley to rotate, and the active synchronous pulley can drive the driven synchronous pulley to rotate through the synchronous belt, thereby driving the iris camera to rotate at the pitch angle.

[0036] Optionally, a position feedback element is provided on the base, the position feedback element is connected to the side plate, and the position feedback element is used to detect the rotation angle of the iris camera.

[0037] By adopting the above technical solution, the position feedback element can reflect the rotation angle of the iris camera in the pitch direction and timely feedback the position information of the iris camera.

[0038] In summary, the present application includes at least one of the following beneficial effects:

[0039] 1. The driving source drives the iris camera to rotate at a pitch angle through a transmission member. Compared with the related art, the present application can reduce the size of the overall structure in the length direction, making the structure more compact;

[0040] 2. The fan-shaped driving gear and driven gear can reduce weight and achieve lightweight;

[0041] 3. The load frame is flange-connected to the active rotating shaft and the driven rotating shaft respectively, and the iris camera is detachably connected to the load frame, which can facilitate the installation and removal of the iris camera and make maintenance simple and easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the overall structure of the lens rotation structure used for biometric identification in Example 1 of the present application;

[0043] Figure 2 is a schematic diagram showing the structure of a transmission member in Example 1 of the present application;

[0044] Figure 3 is a front view schematic diagram of a lens rotation structure for biometric identification according to Example 1 of the present application;

[0045] Figure 4 It is a schematic diagram of the overall structure of the lens rotation structure used for biometric identification in Example 2 of the present application.

[0046] Explanation of the accompanying drawings: 1. base; 11. bottom plate; 12. side plate; 121. weight-reducing groove; 2. driving source; 3. connecting seat; 4. transmission member; 41. driving gear; 411. weight-reducing hole; 42. driven gear; 43. driving synchronous pulley; 44. driven synchronous pulley; 45. synchronous belt; 5. driving rotating shaft; 6. driven rotating shaft; 7. load frame; 8. iris camera; 9. position feedback element; 10. connecting screw. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-4 This application is described in further detail.

[0048] Embodiment 1:

[0049] Embodiment 1 of the present application provides a lens rotation structure for biometric identification.

[0050] refer to Figure 1 and Figure 2, the lens rotation structure for biometric identification includes a base 1, a driving source 2 and a connecting seat 3. The base 1 includes a bottom plate 11 and a side plate 12, two side plates 12 are arranged in parallel and at intervals, the bottom plate 11 is fixedly connected to the ends of the two side plates 12 respectively, and the two side plates 12 are perpendicular to the bottom plate 11. The side plates 12 are provided with weight-reducing grooves 121, and the weight-reducing grooves 121 reduce the weight while ensuring the structural strength of the base 1 to achieve lightweight. In this embodiment, the driving source 2 is a motor, and the driving source 2 is located between the two side plates 12. The connecting seat 3 is fixedly connected to one of the side plates 12, and the end of the body of the driving source 2 is fixedly connected to the connecting seat 3, and the axial direction of the output end of the driving source 2 is perpendicular to the side plate 12.

[0051] refer to Figure 1 , one of the side plates 12 is rotatably connected to the active rotating shaft 5, and the other side plate 12 is rotatably connected to the driven rotating shaft 6, and the active rotating shaft 5 and the driven rotating shaft 6 are coaxial. A load frame 7 and an iris camera 8 are arranged between the two side plates 12, and the load frame 7 is flange-connected to the active rotating shaft 5 and the driven rotating shaft 6 respectively. A connecting screw 10 is arranged on the top of the load frame 7, and the iris camera 8 is fixedly connected to the load frame 7 by the connecting screw 10, which can facilitate the installation and disassembly of the iris camera 8 and the load frame 7, making maintenance simple and easy. The iris camera 8 is located directly above the driving source 2, and there is a certain distance between the iris camera 8 and the driving source 2. After calculation, the rotation angle of the iris camera 8 is reasonably avoided without interference.

[0052] refer to Figure 2 and Figure 3 The lens rotation structure for biometric identification also includes a transmission member 4, which includes a driving gear 41 and a driven gear 42. The driving gear 41 is fixedly connected to the output shaft of the driving source 2, and the driven gear 42 is fixedly connected to the driving rotating shaft 5, and the driving gear 41 is meshed with the driven gear 42. In this embodiment, the driving gear 41 and the driven gear 42 use fan-shaped gears, which can reduce the occupied space and mass. The driving gear 41 and the driven gear 42 are both provided with weight-reducing holes 411, which further reduce the weight while ensuring the strength.

[0053] refer to Figure 3 The lens rotation structure for biometric identification further includes a position feedback element 9. In this embodiment, the position feedback element 9 is specifically a rotary encoder. A compact position feedback element 9 is selected to save volume and space, thereby achieving a miniaturized and lightweight design. The body of the position feedback element 9 is fixedly connected to the side wall of the side panel 12, and the detection axis of the position feedback element 9 is fixedly connected to the driven rotating shaft 6. The position feedback element 9 can detect the rotation angle of the driven rotating shaft 6.

[0054] The implementation principle of the lens rotation structure for biometric identification in Example 1 of the present application is as follows: when the driving source 2 is started, the output end of the driving source 2 drives the driving gear 41 to rotate and the driven gear 42 to rotate synchronously, and the driven gear 42 drives the driving rotating shaft 5, the load frame 7, the iris camera 8 and the driven rotating shaft 6 to rotate, so as to realize the rotation of the iris camera 8 in the pitch direction, and realize the tracking and shooting identification of the iris camera 8 in the pitch direction. The position feedback element 9 can detect the rotation angle of the driven rotating shaft 6 and provide feedback on the pitch angle of the iris camera 8.

[0055] Embodiment 2:

[0056] Embodiment 2 of the present application provides a lens rotation structure for biometric identification.

[0057] refer to Figure 4 , the difference between the embodiment 2 of the present application and the embodiment 1 is that the transmission member 4 includes a driving synchronous pulley 43, a driven synchronous pulley 44 and a synchronous belt 45. The driving synchronous pulley 43 is fixedly connected to the output end of the driving source 2, the driven synchronous pulley 44 is fixedly connected to the driving rotating shaft 5, the synchronous belt 45 is sleeved on the driving synchronous pulley 43 and the driven synchronous pulley 44, and the synchronous belt 45 is respectively meshed with the driving synchronous pulley 43 and the driven synchronous pulley 44.

[0058] The implementation principle of the lens rotation structure for biometric identification in Example 2 of the present application is as follows: when the driving source 2 is started, the output end of the driving source 2 drives the active synchronous belt pulley 43 to rotate, and the active synchronous belt 45 driving wheel rotates the driven synchronous belt pulley 44 through the synchronous belt 45, thereby realizing the rotation of the iris camera 8 at the pitch angle.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lens rotation structure for biometric identification, characterized in that: include: Base (1); A driving source (2), the driving source (2) being fixed to the base (1); an iris camera (8), the iris camera (8) being arranged on one side of the orthographic projection of the driving source (2); A transmission member (4), the transmission member (4) being arranged on the base (1) and connected to the driving source (2) so as to be able to carry the iris camera (8) and rotate in a preset direction as driven by the driving source (2).

2. The lens rotation structure for biometric identification according to claim 1, characterized in that: The base (1) is in a U-shape, comprising a bottom plate (11) and side plates (12) vertically connected to the bottom plate (11) and arranged opposite to each other, the driving source (2) being arranged in the base (1), and the transmission member (4) being connected to one of the side plates (12).

3. The lens rotation structure for biometric identification according to claim 2, characterized in that: The lens rotation structure for biometric identification further comprises a load frame (7), the load frame (7) being in a U-shape, the opposite ends of the load frame (7) being respectively connected to the two side plates (12), and the iris camera (8) being fixed on the inner side of the load frame (7) and facing the driving source (2).

4. The lens rotation structure for biometric identification according to claim 3, characterized in that: Also includes: An active rotating shaft (5), the active rotating shaft (5) being rotatably disposed on the base (1), and the transmission member (4) being used to drive the active rotating shaft (5) to rotate; A driven rotating shaft (6), the driven rotating shaft (6) being rotatably disposed on the base (1), and the load frame (7) being respectively connected to the active rotating shaft (5) and the driven rotating shaft (6).

5. The lens rotation structure for biometric identification according to claim 3, characterized in that: The iris camera (8) is detachably connected to the load frame (7).

6. The lens rotation structure for biometric identification according to claim 4, characterized in that: The transmission member (4) comprises: A driving gear (41), the driving gear (41) being arranged at an output end of the driving source (2); A driven gear (42), the driven gear (42) is connected to the driving rotating shaft (5), and the driven gear (42) is meshed with the driving gear (41).

7. The lens rotation structure for biometric identification according to claim 6, characterized in that: The driving gear (41) and the driven gear (42) are respectively arranged in a sector shape.

8. The lens rotation structure for biometric identification according to claim 6, characterized in that: The driving gear (41) and the driven gear (42) are provided with weight-reducing holes (411).

9. The lens rotation structure for biometric identification according to claim 4, characterized in that: The transmission member (4) comprises: An active synchronous pulley (43), wherein the active synchronous pulley (43) is arranged at an output end of the driving source (2); A driven synchronous pulley (44), wherein the driven synchronous pulley (44) is connected to the driving rotating shaft (5); A synchronous belt (45), wherein the synchronous belt (45) is respectively sleeved on the driving synchronous belt pulley (43) and the driven synchronous belt pulley (44).

10. A lens rotation structure for biometric identification according to any one of claims 1 to 9, characterized in that: A position feedback element (9) is provided on the base (1), the position feedback element (9) is connected to the side plate (12), and the position feedback element (9) is used to detect the rotation angle of the iris camera (8).

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