Integrated variable-focus liquid lens module

Abstract

The invention relates to the technical field of zoom optical systems, in particular to an integrated zoom liquid lens module which comprises an adjusting assembly fixedly connected into an embedded groove. An inner connecting cylinder is slidably connected in the outer connecting cylinder, an electromagnet is connected to the bottom in the outer connecting cylinder, and a ferromagnetic material is arranged on the surface, close to the electromagnet, of the bottom of the inner connecting cylinder and used for generating magnetic attraction with the electromagnet. The surface deformation of the flexible polymer film is monitored in real time through the multiple sets of distance sensors, closed-loop feedback control is formed, when the surface deformation curvatures of the flexible polymer film are inconsistent, the magnitude of currents of electromagnets in the multiple sets of adjusting assemblies is controlled, and therefore the force applied to the flexible polymer film in the area by the connected extrusion rods is adjusted; the deformation accuracy of the flexible polymer film is improved, so that the flexible polymer film has accurate and rapid dynamic focusing capability and response speed; when the surface deformation of the film is uneven, the system can independently adjust the pressure of each area to ensure the accuracy of the overall deformation and improve the imaging quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of zoom optical systems, in particular to an integrated variable-focus liquid lens module. BACKGROUND

[0002] The variable-focus liquid lens module has a core of a container filled with optical liquid, a flexible polymer film covers the top, and an electromagnet inside the lens controls the movement of the adjusting ring to change the shape of the film and achieve rapid focusing.

[0003] The variable-focus liquid lens module in the prior art is usually fixed on a mechanical arm, and then adjusted by the mechanical arm to be located above the surgical area to magnify the surgical area for medical personnel to watch and assist in treatment. The shape of the film is controlled by controlling the movement of the adjusting ring, and since the adjusting ring has a fixed structure, when the film has inconsistent deformation curvature, the adjusting ring cannot fine-tune the film.

[0004] Therefore, an integrated variable-focus liquid lens module is proposed to solve the problems mentioned above. SUMMARY

[0005] To achieve the above purpose, the present application provides the following technical scheme: An integrated variable-focus liquid lens module, characterized in that it comprises: A lens assembly for magnifying the monitoring area below; A limiting assembly for limiting the end of the external sterile cover outside the lateral wall of the lens assembly; Its effect is that the position of the lens assembly is adjusted by the mechanical arm, and the magnified area of the lens assembly on the surgical area below is adjusted. The lens assembly is located at the end of the mechanical arm, and the limiting assembly limits the end of the sterile cover between the lateral wall outside the lens assembly and the lateral wall inside the limiting assembly, so that the end of the sterile cover is embedded in the lens module, avoiding the influence of the sterile cover on the use of the lens assembly. A shielding assembly is arranged below the lens assembly to avoid blood splashing on the flexible polymer film during the medical procedure; Its effect is that when blood splashes on the shielding film during surgery, the motor in the second containing frame is started to drive the second winding rod to rotate, so that the shielding film enters the second containing frame from the first containing frame area, and is gently unfolded to the lower side of the lens frame through the entering slot. The shielding film splashed with blood can be replaced, blood splashing on the flexible polymer film is avoided, and the shielding film contaminated with blood can be quickly replaced. Manual cleaning is avoided during critical operation moments due to contamination. An adjusting assembly and a flexible polymer film are arranged in the lens assembly. The lens assembly comprises a lens frame, a recess is formed in the bottom of the lens frame in a hollow manner, and a plurality of distance sensors are embedded in the side wall of the recess in a ring shape, and the plurality of distance sensors are used for monitoring the distance from the surface of the flexible polymer film; The lens frame is provided with an embedding groove and a placing cavity; The placing cavity is connected with the flexible polymer film.

[0006] In a possible implementation, the adjusting assembly is fixedly connected in the embedding groove; The adjusting assembly comprises a connecting outer cylinder fixedly connected with the side wall of the embedding groove, a connecting inner cylinder slidingly connected in the connecting outer cylinder, and an electromagnet connected with the bottom of the connecting outer cylinder, and a ferromagnetic material is arranged on the surface of the bottom of the connecting inner cylinder close to the electromagnet, so as to generate magnetic attraction with the electromagnet.

[0007] In a possible implementation, an extrusion rod is fixedly connected with the top of the connecting inner cylinder, and the extrusion rod is in contact with the surface of the flexible polymer film; The adjusting assembly is provided with a plurality of groups, and the plurality of groups of adjusting assemblies are arranged in the embedding groove in a ring shape.

[0008] In a possible implementation, the limiting assembly comprises a bottom frame fixedly connected with the first containing frame and the second containing frame; A first threaded area is arranged on the inner side wall of the bottom frame at the upper end, the first threaded area is threadedly connected with a second threaded area, and a limiting frame is coaxially arranged in the bottom frame.

[0009] In a possible implementation, a first inclined surface area is arranged on the side wall of the lower end of the second threaded area, and a second inclined surface area is arranged on the outer side wall of the limiting frame at the upper end.

[0010] In a possible implementation, the shielding assembly comprises a first containing frame, and the outer peripheral wall of the lens frame is fixedly connected with the first containing frame and a second containing frame at the left end and the right end respectively; The first containing frame and the second containing frame are in communication with the lens frame through the entering groove.

[0011] In a possible implementation, a first winding rod is rotationally connected in the first containing frame; A motor is boltedly connected in the second containing frame, and the output shaft of the motor drives a second winding rod to be rotationally connected in the second containing frame.

[0012] In a possible implementation, the first winding rod and the second winding rod are respectively wound around the left end and the right end of the shielding film, and the shielding film in the first containing frame slides through the lens frame into the second containing frame through the entering groove.

[0013] In a possible implementation, when the limiting frame is not stressed, the limiting frame is in the structure of a circular truncated cone with the upper end being wide and the lower end being narrow; The effect is that the upper end of the limiting frame moves inward after being stressed and extruded, and the upper end of the limiting frame can clamp and limit the sterile sleeve.

[0014] Compared with the prior art, the application provides an integrated variable-focus liquid lens module, which has the following beneficial effects: 1、The application can monitor the surface deformation of the flexible polymer film in real time through multiple sets of distance sensors, form a closed-loop feedback control, control the current of the electromagnet in the multiple sets of adjusting assemblies when the surface deformation curvature of the flexible polymer film is inconsistent, and adjust the force applied by the connected extrusion rods on the flexible polymer film in the region, so that the accuracy of the deformation of the flexible polymer film is improved, and the dynamic focusing ability and response speed of the flexible polymer film are accurate and fast; when the surface deformation of the film is uneven, the system can independently adjust the pressure of each region to ensure the accuracy of the overall deformation and improve the imaging quality.

[0015] 2、The application inserts the sterile sleeve end between the outer peripheral wall of the limiting frame and the endoscope frame, rotates the second threaded area to engage the first threaded area of the bottom frame, moves the second threaded area downward, slides and extrudes the second inclined area and the first inclined area, drives the limiting frame to shrink inward, and clamps the sterile sleeve end to form a seal.

[0016] 3、The application limits the sterile sleeve end between the outer side wall of the lens assembly and the inner side wall of the limiting assembly, so that the sterile sleeve end is embedded in the lens module, and the use of the lens assembly is not affected by the sterile sleeve.

[0017] 4、The application can clearly observe the details of tissues at different depths through high-precision dynamic zooming, and the reliable sterile fixation reduces the risk of infection; automatic anti-pollution and quick replacement of the shielding film ensure a continuous clear vision during the operation, reduce interruptions caused by pollution, and improve the accuracy, smoothness and safety of the operation as a whole, and reduce the operation burden of medical staff. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic view of the planar structure of the application; Figure 2 It is a schematic view of the planar structure of the application; Figure 1 It is an A-A sectional view of the application; Figure 3 It is a schematic view of the lens frame structure of the application; Figure 4 It is a schematic view of the structure of the application; Figure 1 ; Figure 5 It is a schematic view of the structure of the application; Figure 2 ; Figure 6This is a schematic diagram of the structure of the regulating component of the present invention; Figure 7 It is a schematic diagram of the prior art structure of the present invention.

[0019] In the figure: 1. Lens assembly; 2. Limiting assembly; 3. Blocking assembly; 4. Adjusting assembly; 5. Flexible polymer membrane; 11. Mirror frame; 12. Groove; 13. Distance sensor; 14. Embedding slot; 15. Placement cavity; 21. bottom frame; 22. first threaded area; 23. second threaded area; 24. limiting frame; 231. first bevel area; 241. second bevel area; 31. First accommodating frame; 32. First winding rod; 33. Entry slot; 34. Second accommodating frame; 35. Second winding rod; 41. Connect the outer cylinder; 42. Connect the inner cylinder; 43. Electromagnet; 44. Extrusion rod. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1 - Figure 6 , an integrated variable focus liquid lens module in this embodiment, lens assembly 1, lens assembly 1 is used to magnify the monitoring area below, making it easier for medical staff to treat the surgical area; The limiting component 2 is used to limit the end of the external sterile sleeve to the outer wall of the lens assembly 1; And because the lens assembly 1 is often set on the magnifying glass on the robot arm, the position of the magnifying glass and the lens assembly 1 is adjusted by the robot arm, and the magnification area of ​​the lens assembly 1 on the lower surgical area is adjusted accordingly. The lens assembly 1 is located at the end of the robot arm, and the end of the sterile cover is restricted between the outer wall of the lens assembly 1 and the inner wall of the restriction assembly 2 by the restriction assembly 2, so that the end of the sterile cover is embedded in the lens module, thereby preventing the sterile cover from affecting the use of the lens assembly 1; The shielding assembly 3 is provided below the lens assembly 1 and is used to prevent blood from being sprayed onto the flexible polymer film 5 during external medical surgery; An adjustment component 4 and a flexible polymer membrane 5 are disposed within the lens assembly 1; The lens assembly 1 comprises a lens frame 11, a recess 12 is formed in the bottom of the lens frame 11, and a plurality of distance sensors 13 are embedded in the side wall of the recess 12, which are used to monitor the distance from the surface of the flexible polymer film 5. The lens frame 11 is provided with an embedded groove 14 and a placement cavity 15. The placement cavity 15 is connected with the flexible polymer film 5, and the flexible polymer film 5 is filled with a high-refractive optical liquid.

[0022] Further, as shown in the figure, Figures 1-6 The adjusting assembly 4 is fixedly connected in the embedded groove 14; The adjusting assembly 4 comprises a connecting outer cylinder 41, which is fixedly connected with the side wall of the embedded groove 14, and the connecting outer cylinder 41 is made of plastic. The connecting outer cylinder 41 is slidably connected with a connecting inner cylinder 42, and the bottom of the connecting outer cylinder 41 is connected with an electromagnet 43. A ferromagnetic material is arranged on the surface of the bottom of the connecting inner cylinder 42 close to the electromagnet 43, which is used to generate magnetic attraction with the electromagnet 43. The connecting outer cylinder 41 and the connecting inner cylinder 42 are connected through a spring, which can provide a reset force for the reset of the connecting inner cylinder 42. The top of the connecting inner cylinder 42 is fixedly connected with a pressing rod 44, which is in contact with the surface of the flexible polymer film 5, and the pressing rod 44 is used to apply a pushing force to the flexible polymer film 5. The adjusting assembly 4 is provided with a plurality of adjusting assemblies 4, which are arranged in the embedded groove 14 in a ring shape. In the initial state, the electromagnet 43 is not electrified, the connecting inner cylinder 42 is located at the bottom of the connecting outer cylinder 41 with the assistance of the spring, and the pressing rod 44 applies a basic pressure to the flexible polymer film 5, forming a planar lens structure. When zooming is needed, the control system calculates the required curvature according to the distance of the surgical area, and outputs a pulse current to the electromagnet 43: When the current is increased, the electromagnet 43 magnetically attracts the connecting inner cylinder 42 to move downward, and the pressing rod 44 reduces the pressure on the flexible polymer film 5. When the current is reduced, the connecting inner cylinder 42 moves upward under the reset force of the spring, and the pressing rod 44 increases the pressure, thereby achieving rapid zooming. The plurality of distance sensors 13 monitor the deformation of the surface of the flexible polymer film 5 in real time, forming a closed-loop feedback control, and the focal length adjustment accuracy reaches ±0.1 mm. When the deformation curvature of the surface of the flexible polymer film 5 is inconsistent, the current of the electromagnet 43 in the plurality of adjusting assemblies 4 is controlled, and the force applied by the connected pressing rod 44 to the flexible polymer film 5 in the region is adjusted, so that the deformation accuracy of the flexible polymer film 5 is improved, and the accurate and rapid dynamic focusing ability and response speed of the flexible polymer film 5 are improved.

[0023] Further, as shown in the figure, Figures 1-6As shown, the limiting assembly 2 comprises a bottom frame 21 fixedly connected to the first containing frame 31 and the second containing frame 34; The inner side wall of the bottom frame 21 is provided with a first threaded area 22 at the upper end, which is threadedly connected with a second threaded area 23. A limiting frame 24 is coaxially arranged in the bottom frame 21; The limiting frame 24 is made of medical engineering plastic. The limiting frame 24 has a hollow structure, and the inner side wall surface of the limiting frame 24 is provided with a rubber layer. When the limiting frame 24 is not subjected to extrusion, the left and right ends of the limiting frame 24 expand outward, and the limiting frame 24 as a whole has a V-shaped structure. The middle part of the limiting frame 24 is hollow, which facilitates the expansion of the limiting frame 24 and the gap between the outer side wall of the mirror frame 11, and facilitates the placement of the sterile sleeve between the limiting frame 24 and the mirror frame 11; When the limiting frame 24 is not subjected to force, the limiting frame 24 has a circular truncated cone structure with a wide upper end and a narrow lower end; The lower end side wall of the second threaded area 23 is provided with a first inclined surface area 231, and the upper end outer side wall of the limiting frame 24 is provided with a second inclined surface area 241. The first inclined surface area 231 is used for extrusion contact with the second inclined surface area 241, so that the second inclined surface area 241 swings inward, and the second inclined surface area 241 drives the left and right ends of the limiting frame 24 to swing to the middle area, and then the left and right ends of the limiting frame 24 are extruded and contacted with the side wall of the mirror frame 11; The mirror frame 11 of the lens assembly 1 is installed on the microscope at the end of the mechanical arm, and the groove 12 is downwardly aligned with the surgical area; The sterile sleeve is sleeved on the outer side of the mirror frame 11, and is fixed by the limiting assembly 2: the sterile sleeve is inserted between the limiting frame 24 and the outer peripheral wall of the endoscope frame 11, the second threaded area 23 is rotated to engage with the first threaded area 22 of the bottom frame 21, the second threaded area 23 moves downward, the second inclined surface area 241 and the first inclined surface area 231 are extruded and slid, the limiting frame 24 is driven to shrink inward, and the sterile sleeve end is clamped to form a seal.

[0024] Further, as shown in Figures 1-6 The shielding assembly 3 comprises a first containing frame 31, and the outer peripheral wall of the mirror frame 11 is fixedly connected with the first containing frame 31 and the second containing frame 34 at the left and right ends; The first containing frame 31 and the second containing frame 34 are in communication with the mirror frame 11 through the entering groove 33; The first containing frame 31 is rotatably connected with a first winding rod 32; The second containing frame 34 is screw-connected with a motor, the output shaft of the motor drives a second winding rod 35 to be rotatably connected with the second containing frame 34, and the first winding rod 32 and the second winding rod 35 are respectively wound and collected at the left and right ends of the shielding film S. The shielding film S in the first containing frame 31 slides through the mirror frame 11 into the second containing frame 34 through the entering groove 33; Wherein, in the operation, when blood is sprayed on the shielding film S, the motor in the second containing frame 34 is started to drive the second winding rod 35 to rotate, so that the shielding film S enters the second containing frame 34 from the area of the first containing frame 31 and is unfolded gently to the lower side of the frame 11 through the entry groove 33, so that the shielding film S splashed by blood can be replaced, blood splashing on the flexible polymer film 5 is avoided, and the shielding film S contaminated by blood can be quickly replaced; the operation is not interrupted for manual cleaning due to pollution at a critical operation moment. The shielding film S is made of polydimethylsiloxane material, has a thickness of 0.1-0.3mm, and a light transmittance of ≥95%, so that the optical path is not distorted; and the elastic modulus can withstand a maximum blood spraying pressure of 1.5kPa, effectively blocking the splashing of body fluids during the operation.

[0025] The mounting mode, connecting mode or setting mode disclosed in the embodiment are all common mechanical connecting modes, and any mode that can achieve the beneficial effects can be implemented, so the specific structure, composition and working principle will not be described in detail.

[0026] It should be noted that, in this document, the terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0027] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.​

Claims

1. An integrated variable focus liquid lens module, characterized in that: include; A lens assembly (1), the lens assembly (1) is used to magnify the monitoring area below; A limiting component (2) is used to limit the end of the external sterile sleeve to the outer wall of the lens component (1); A shielding assembly (3) is arranged below the lens assembly (1) and is used to prevent blood from being sprayed onto the flexible polymer film (5) during an external medical operation; An adjustment component (4) and a flexible polymer membrane (5) are arranged in the lens component (1); The lens assembly (1) comprises a lens frame (11), the bottom of the lens frame (11) is hollowed out to form a groove (12), and the side wall of the groove (12) is annularly embedded with multiple sets of distance sensors (13), and the multiple sets of distance sensors (13) are used to monitor the distance from the surface of the flexible polymer film (5); An embedding groove (14) and a placement cavity (15) are provided in the mirror frame (11); A flexible polymer film (5) is connected to the placement cavity (15).

2. The integrated variable focus liquid lens module according to claim 1, characterized in that: The adjustment component (4) is fixedly connected in the embedding groove (14); The adjustment component (4) includes a connecting outer cylinder (41), the connecting outer cylinder (41) is fixedly connected to the side wall of the embedded groove (14), the connecting inner cylinder (42) is slidably connected inside the connecting outer cylinder (41), the bottom of the connecting outer cylinder (41) is connected to the electromagnet (43), and a ferromagnetic material is provided on the surface of the bottom of the connecting inner cylinder (42) near the electromagnet (43) for generating magnetic attraction with the electromagnet (43).

3. The integrated variable focus liquid lens module according to claim 2, characterized in that: An extrusion rod (44) is fixedly connected to the top of the connecting inner cylinder (42), and the extrusion rod (44) is in contact with the surface of the flexible polymer film (5); The adjustment components (4) are provided in multiple groups, and the multiple groups of adjustment components (4) are arranged in an annular shape in the embedding groove (14).

4. The integrated variable focus liquid lens module according to claim 1, characterized in that: The limiting assembly (2) comprises a bottom frame (21), wherein the bottom frame (21) is fixedly connected to the first accommodating frame (31) and the second accommodating frame (34); A first threaded area (22) is provided at the upper end of the inner side wall of the bottom frame (21), the first threaded area (22) is threadedly connected to the second threaded area (23), and a limiting frame (24) is coaxially provided in the bottom frame (21).

5. The integrated variable focus liquid lens module according to claim 4, characterized in that: A first inclined surface area (231) is provided on the side wall at the lower end of the second threaded area (23), and a second inclined surface area (241) is provided on the upper end of the outer side wall of the limiting frame (24).

6. The integrated variable focus liquid lens module according to claim 1, characterized in that: The shielding assembly (3) comprises a first accommodating frame (31), and the left and right ends of the outer peripheral wall of the mirror frame (11) are respectively fixedly connected to the first accommodating frame (31) and the second accommodating frame (34); The first accommodating frame (31) and the second accommodating frame (34) pass through the outer peripheral wall of the mirror frame (11) via the entry groove (33) and are in communication with the embedding groove (14) and the placement cavity (15).

7. The integrated variable focus liquid lens module according to claim 6, characterized in that: A first winding rod (32) is rotatably connected in the first accommodating frame (31); A motor is bolted inside the second accommodating frame (34), and an output shaft of the motor drives the second winding rod (35) to be rotatably connected to the second accommodating frame (34).

8. The integrated variable focus liquid lens module according to claim 7, characterized in that: The first reeling rod (32) and the second reeling rod (35) are respectively reeled in with the left and right ends of the shielding film, and the shielding film in the first receiving frame (31) slides through the lens frame (11) through the entry groove (33) and enters the second receiving frame (34); The shielding film enters the second accommodating frame (34) from the area of ​​the first accommodating frame (31) and smoothly unfolds to the bottom of the frame (11) through the entry groove (33), so that the shielding film splashed by blood can be replaced, thereby preventing blood from splashing onto the flexible polymer film (5). The shielding film stained with blood can be quickly replaced, thereby avoiding the need to interrupt the operation for manual cleaning due to contamination at critical moments of surgery.

9. The integrated variable focus liquid lens module according to claim 4, characterized in that: When the limiting frame (24) is not subjected to force, the limiting frame (24) is a truncated cone-shaped structure that is wide at the top and narrow at the bottom.

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