Camera handle structure of automatic focusing laparoscope

Abstract

The utility model relates to the field of medical instruments, and discloses an automatic focusing laparoscope camera handle structure. The handle comprises a shell assembly and a CMOS-motor assembly, wherein the CMOS-motor assembly is fixed in the shell assembly. The shell assembly comprises a front shell, a rear shell, a plurality of fixing pieces and a plurality of sealing pieces, so that the stability and the sealing performance of the structure are ensured. The CMOS-motor assembly achieves an automatic focusing function through the guide rail, the movable lens cone, the motor and other parts, and the photoelectric sensor is used for monitoring the position of the movable lens cone in real time so as to improve the focusing precision. The structural design of the handle accords with ergonomics, fatigue of doctors during operation is relieved, the handle has good grabbing feeling and skid resistance, clear and stable image quality can be kept in the operation process, and meanwhile the handle meets the strict medical instrument cleaning requirement.

Description

Technical Field

[0001] This application relates to the field of medical devices, and particularly to the automatic focusing technology of laparoscopic camera handles. Background Art

[0002] As a minimally invasive surgical technique, laparoscopic surgery has been widely used in the medical field in recent years. However, with the increase in surgical complexity and the requirement for surgical precision, some limitations of traditional laparoscopic camera handles have gradually emerged during use.

[0003] First of all, traditional laparoscopic camera handles usually require doctors to manually adjust the focus, which not only increases the complexity of surgical operations but also may cause delays during the surgery. During long surgeries, frequent manual focusing may distract doctors' attention and affect the continuity and efficiency of the surgery. Especially in poor lighting conditions or complex intra-abdominal environments, maintaining image clarity becomes more challenging.

[0004] Secondly, there is still room for improvement in the ergonomic design of existing laparoscopic camera handles. Long-term surgical operations are likely to cause hand fatigue in doctors, affecting surgical precision and stability. Differences in hand shapes and usage habits among different doctors make it difficult to design a handle suitable for everyone.

[0005] Thirdly, in the surgical environment, the sealing performance of the device is crucial. Traditional handles may have problems with insufficient sealing and are easily infiltrated by liquids or other substances during the surgery, which not only affects the service life of the device but also increases the risk of cross-infection. In addition, the frequent cleaning and disinfection processes also pose higher requirements for the sealing performance of the device.

[0006] Finally, with the improvement of image sensor performance, the heat dissipation problem has become increasingly prominent. The heat dissipation design of traditional handles may not meet the needs of new-generation high-performance sensors, especially during long or high-load surgeries, which may cause the device to overheat and affect image quality and device life.

[0007] In view of the above problems, it is particularly important to develop a laparoscopic camera handle structure that can automatically focus, conform to ergonomics, have good sealing performance and heat dissipation effects. This can not only improve the precision and efficiency of surgical operations but also improve doctors' usage experience, while extending the service life of the device and providing strong support for the further development of laparoscopic surgery. Utility Model Content

[0008] The purpose of this application is to provide a structure of an automatically focusing laparoscopic camera handle to solve the problems raised in the above background art.

[0009] The present application discloses a structure of an auto-focus laparoscopic camera handle, including:

[0010] A housing assembly, which includes a front housing, a rear housing, an inner liner at the rear of the housing, a button fixing member and a rubber button. Concave structures are provided on both sides of the front housing, and a groove structure for accommodating the rubber button is provided at the top.

[0011] A CMOS-motor assembly, fixed within the housing assembly. The CMOS-motor assembly includes a CMOS image sensor, an L-shaped bracket, a heat dissipation copper sheet, a guide rail, a movable lens barrel, a motor, a photoelectric sensor and a motor control board. The CMOS image sensor is fixed through the L-shaped bracket and the heat dissipation copper sheet. A cylindrical hole coaxial with the CMOS image sensor is provided at the center of the guide rail. The movable lens barrel is placed within this cylindrical hole and is threadedly connected to the screw of the motor. The motor is fixed to one side at the bottom of the guide rail, the photoelectric sensor is fixed to the other side at the bottom of the guide rail, and the motor control board is fixed to the top of the guide rail and electrically connected to the motor.

[0012] During operation, the motor drives the movable lens barrel to move axially along the guide rail, and the position information is fed back through the photoelectric sensor to achieve auto-focus of the CMOS image sensor. The rubber button is provided with a key for controlling the auto-focus function.

[0013] In a preferred example, the rubber button is made of high-density silicone rubber. Its bottom is snapped into the groove at the top of the front housing and fixed through the button fixing member, playing a role in waterproof sealing. The surface of the rubber button is provided with anti-slip textures to enhance the hand feeling and control force during operation.

[0014] In a preferred example, the housing assembly further includes a tail fixing member, a tail nut buckle, a filter and a wire harness rubber. The tail fixing member and the tail nut buckle connect and fix the rear housing to the power supply wire harness. The filter and the wire harness rubber are sleeved on the power supply wire harness, playing a role in shielding stray light and waterproof sealing.

[0015] In a preferred example, a circular counterbore is provided at the front end of the front housing for installing the filter. The filter is fixed to the bottom surface of the circular counterbore through medical glue to achieve light filtering and sealing.

[0016] In a preferred example, a sealing ring groove and a sealing ring are provided between the front housing and the rear housing. The inner liner at the rear of the housing is fixed to the front housing through screws. A sealing ring groove is provided at the cross-section of the tail end of the front housing for sealing the rear end of the handle cavity. The overall housing assembly has waterproof sealing performance to meet the strict cleaning requirements of medical devices.

[0017] In a preferred embodiment, the CMOS-motor assembly further includes a lens barrel screw, a guide rod joint, and a motor push rod. The movable lens barrel is connected to the guide rod joint by the lens barrel screw and is threadedly connected to the screw of the motor by the motor push rod. The forward and reverse rotation of the motor drives the movable lens barrel to move axially along the guide rail.

[0018] In a preferred embodiment, the front end of the guide rail is provided with a cylindrical step for positioning with the round hole at the front end of the front housing. The guide rail is made of wear-resistant alloy to ensure the smooth movement and durability of the movable lens barrel during long-term use.

[0019] In a preferred embodiment, there are three holes on the right side of the CMOS image sensor. The middle one is a threaded hole for fixing, and the upper and lower ones are positioning holes for positioning. On one side of the tail end of the guide rail, there are two positioning posts and a through hole for assembling and positioning with the CMOS image sensor.

[0020] In a preferred embodiment, the CMOS image sensor is connected and positioned with the guide rail through the positioning posts and positioning holes, and is fixed and cooled by an L-shaped bracket and a heat dissipation copper sheet. The heat dissipation copper sheet conducts the heat generated by the CMOS image sensor to the housing assembly to achieve effective heat dissipation.

[0021] In a preferred embodiment, the photoelectric sensor includes two photoelectric sensor elements for sensing the position of the guide rod joint. The photoelectric sensor detects the position information of the movable lens barrel and transmits a feedback signal to the motor control board to achieve precise positioning through closed-loop control.

[0022] In a preferred embodiment, the motor control board is fixed on the top of the guide rail through a control board connecting piece and is electrically connected to the motor. The motor control board includes a microprocessor for processing the signals of the photoelectric sensor and controlling the rotation direction and speed of the motor to optimize the focusing speed and accuracy.

[0023] In a preferred embodiment, the central cylindrical hole of the guide rail is coaxially arranged with the CMOS image sensor to ensure that the moving path of the movable lens barrel is aligned with the optical axis of the CMOS image sensor to maintain the focusing accuracy of the image.

[0024] In a preferred embodiment, there are two installation positions at the bottom of the guide rail. One side is for fixing the motor, and the other side is for fixing the photoelectric sensor to ensure the coordinated cooperation of motor drive and position sensing.

[0025] In a preferred embodiment, there is a threaded hole at the top of the guide rail for fixing the control board connecting piece, and the control board connecting piece is used to support the motor control board to achieve stable motor control.

[0026] In a preferred example, the inner wall of the guide rail is provided with micro lubricating grooves to reduce the friction during the movement of the movable lens barrel, thereby improving the smoothness and accuracy of focusing.

[0027] In a preferred example, the guide rail is manufactured by precision machining technology, and there is a gap of 0.01 - 0.05 mm between its inner diameter and the outer diameter of the movable lens barrel to ensure the smooth movement of the movable lens barrel and the focusing accuracy.

[0028] In a preferred example, the front end and the tail end of the guide rail are provided with limiting structures to limit the movement range of the movable lens barrel to prevent structural damage or focusing misalignment caused by excessive movement.

[0029] In a preferred example, the guide rail is made of wear-resistant composite material, which has high strength and low friction characteristics to extend the service life of the guide rail and ensure the smooth movement of the movable lens barrel.

[0030] In a preferred example, the outer surface of the guide rail is provided with heat dissipation fins to enhance the heat dissipation capacity of the guide rail to prevent the CMOS image sensor from overheating in a high-temperature environment.

[0031] Compared with the prior art, the embodiments of the present application have at least the following differences and effects:

[0032] Optionally, autofocus function: By integrating a CMOS image sensor and a motor control system, the handle can automatically adjust the position of the lens barrel according to the focal length requirement during the operation, thereby realizing the autofocus function of the image. This reduces the frequency of manual focus adjustment by doctors to a certain extent, reduces the operation complexity, and helps to maintain the clarity of the image. However, the accuracy and speed of autofocus may be restricted by the specific operation environment and device settings, especially when the light conditions are poor or the intra-abdominal environment is complex, the effect may be different.

[0033] Optionally, ergonomic design: The shape design of the handle conforms to ergonomics, aiming to improve the comfort of doctors during operation. By optimizing the structure and material of the handle, the handle can reduce the fatigue of doctors during long-term operation and improve the stability and accuracy of operation. However, due to individual differences in doctors' hand shapes and usage habits, the design effect of the handle may be different among different users.

[0034] Optionally, sealing performance: The outer shell assembly of the handle adopts a multi-layer sealing design, which can prevent the infiltration of liquid or other substances during the operation to a certain extent and meet the cleaning and disinfection requirements of medical devices. However, the sealing performance of the handle depends on the assembly accuracy of components such as sealing rings and filter films and the durability of materials, and maintenance or replacement may be required after long-term use.

[0035] Optionally, heat dissipation performance: The CMOS image sensor conducts the generated heat to the handle housing through a heat dissipation copper sheet to maintain the normal operating temperature of the sensor. This heat dissipation design can meet the heat dissipation requirements of the sensor in a general surgical environment, ensuring the stable operation of the handle. However, during long-term or high-load surgeries, the heat dissipation effect of the handle may be limited, and additional cooling measures are required.

[0036] In summary, the autofocus laparoscope camera handle structure of the present application provides certain convenience and operational stability during surgical operations, but its effects are affected by specific usage environments and conditions. Through reasonable use and maintenance, the surgical operation experience and image quality can be improved to a certain extent. It has a very broad application prospect in the field of laparoscopy.

[0037] A large number of technical features are recorded in the specification of the present application, distributed in various technical solutions. If all possible combinations of technical features (i.e., technical solutions) of the present application are listed, the specification will be too lengthy. To avoid this problem, each technical feature disclosed in the above content, each technical feature disclosed in the following embodiments and examples, and each technical feature disclosed in the drawings can be freely combined with each other to form various new technical solutions (these technical solutions are all regarded as having been recorded in this specification), unless the combination of such technical features is technically infeasible. For example, in one example, features A + B + C are disclosed, and in another example, features A + B + D + E are disclosed, and features C and D are equivalent technical means that play the same role. Technically, only one of them can be used and they cannot be used simultaneously. Feature E can be combined with feature C technically. Then, the solution of A + B + C + D should not be regarded as having been recorded because it is technically infeasible, and the solution of A + B + C + E should be regarded as having been recorded. Description of the Drawings

[0038] Figure 1 It is a schematic diagram of the overall appearance of the autofocus laparoscope camera handle structure according to the first embodiment of the present application.

[0039] Figure 2 It is a schematic diagram of the main components of the autofocus laparoscope camera handle structure according to the first embodiment of the present application, showing the housing assembly and the CMOS-motor assembly.

[0040] Figure 3 It is an exploded view of the autofocus laparoscope camera handle structure according to the first embodiment of the present application, showing in detail each component, including the front housing, the rear housing, the inner liner of the rear housing, the button fixing piece, the rubber button, the tail fixing piece, the tail nut buckle, the filter and the wire harness rubber, etc.

[0041] Figure 4Schematic diagram of the sealing structure of the autofocus laparoscope camera handle structure according to the first embodiment of the present application, showing the sealing design of each part of the handle.

[0042] Figure 5 Explosion schematic diagram of the CMOS-motor assembly of the autofocus laparoscope camera handle structure according to the first embodiment of the present application, showing in detail the layout of each component inside the assembly, including the CMOS, L-shaped bracket, heat dissipation copper sheet, guide rail, movable lens barrel, lens barrel screw, guide rod joint, motor push rod, motor, photoelectric sensor, motor control board, and control board connecting piece, etc.

[0043] Figure 6 Schematic diagram of the principle of the motor controlling the operation of the movable lens barrel of the autofocus laparoscope camera handle structure according to the first embodiment of the present application, showing the working principle of the motor driving the movable lens barrel to move to achieve autofocus.

[0044] Figure 7 Partial structure schematic diagram of the CMOS-motor assembly of the autofocus laparoscope camera handle structure according to the first embodiment of the present application, highlighting the layout of key components such as the motor push rod, lens barrel screw, guide rod joint, motor, and photoelectric sensor.

[0045] Figure 8 Schematic diagram of the working principle of the autofocus mechanism of the autofocus laparoscope camera handle structure according to the first embodiment of the present application, showing in detail how components such as the movable lens barrel, lens barrel screw, guide rod joint, motor, motor push rod, and photoelectric sensor work together to achieve the autofocus function.

[0046] In all the drawings, the same reference numerals are used to represent the same elements or structures, where:

[0047] 1: Housing assembly

[0048] 1-1: Front housing

[0049] 1-5: Rubber button

[0050] 1-6: Tail fixing part

[0051] 1-7: Tail nut buckle

[0052] 1-8: Filter

[0053] 1-9: Cable rubber

[0054] 2: CMOS-motor assembly

[0055] 2-1: CMOS image sensor

[0056] 2-2: L-shaped bracket

[0057] 2 - 3: Heat Dissipation Copper Sheet

[0058] 2 - 4: Guide Rail

[0059] 2 - 5: Movable Lens Barrel

[0060] 2 - 6: Lens Barrel Screw

[0061] 2 - 7: Guide Rod Joint

[0062] 2 - 8: Motor Push Rod

[0063] 2 - 9: Motor

[0064] 2 - 10: Photoelectric Sensor

[0065] 2 - 11: Motor Control Board Detailed Implementation Manner

[0066] In the following description, many technical details are presented for the better understanding of the present application by the readers. However, those of ordinary skill in the art can understand that even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the various claims of the present application can still be implemented. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0067] Explanation of Some Concepts:

[0068] Laparoscope: A minimally invasive surgical instrument that enters the patient's body through a small incision and, in cooperation with a camera device, enables internal diagnosis and treatment, featuring minimal trauma and rapid recovery.

[0069] CMOS Image Sensor: An image sensor based on complementary metal - oxide - semiconductor (CMOS) technology, used to capture and process optical signals to generate digital image data. This technology is renowned for its low power consumption and high resolution and is widely applied in imaging devices.

[0070] Guide Rail: A linear motion component in a mechanical device, used to guide the smooth movement of the movable lens barrel along a fixed track to ensure the accuracy of the focusing process.

[0071] Movable Lens Barrel: A movable component with a lens inside. It moves back and forth under the guidance of the guide rail to adjust the focal length of light, thereby achieving the function of automatic focusing.

[0072] Photoelectric Sensor: A sensor that uses the photoelectric effect to detect the position or distance of an object, used to sense the movement position of the movable lens barrel and feedback it to the control system to achieve autofocus control.

[0073] Motor Control Board: A circuit board used to control the operation of the motor. By receiving the feedback signal from the photoelectric sensor, it adjusts the rotation direction and speed of the motor, thereby precisely controlling the position of the movable lens barrel to achieve autofocus.

[0074] Sealing Ring: A ring-shaped structure used to prevent the leakage of liquid or gas, usually made of elastic material, applied to the connection part of the handle to ensure the sealing performance.

[0075] High-Density Silicone Rubber: A silicone rubber material with excellent durability, elasticity, and sealing performance, used to make rubber buttons to ensure the sealing and durability of the handle during medical operations.

[0076] Optical Filter: An optical component used to filter specific wavelength bands of light, installed at the front end of the handle to optimize the light quality received by the CMOS image sensor and ensure image clarity.

[0077] Ergonomics: A discipline that studies how to design tools, equipment, and working environments to adapt to the natural usage habits of the human body. By applying ergonomics, the handle design is more in line with the physiological characteristics of doctors during operation, reducing fatigue and improving surgical precision.

[0078] To make the objectives, technical solutions, and advantages of this application clearer, the following will further describe the implementation manners of this application in detail with reference to the accompanying drawings.

[0079] First Embodiment

[0080] See Figures 1 to 8 , the autofocus laparoscope camera handle structure of this embodiment includes:

[0081] A housing assembly 1, the housing assembly 1 includes a front housing 1-1, a rear housing 1-2, a rear inner liner 1-3 of the housing, a button fixing member 1-4, and a rubber button 1-5. The front housing 1-1 and the rear housing 1-2 are made of medical aluminum alloy, and the overall shape is streamlined. Concave structures are provided on both sides of the front housing 1-1, and a groove structure for accommodating the rubber button 1-5 is provided on the top;

[0082] The CMOS-motor assembly 2 is fixed within the housing assembly 1. The CMOS-motor assembly 2 includes a CMOS image sensor 2-1, an L-shaped bracket 2-2, a heat dissipation copper sheet 2-3, a guide rail 2-4, a movable lens barrel 2-5, a motor 2-9, a photoelectric sensor 2-10, and a motor control board 2-11. The CMOS image sensor 2-1 is fixed by the L-shaped bracket 2-2 and the heat dissipation copper sheet 2-3. The center of the guide rail 2-4 is provided with a cylindrical hole coaxial with the CMOS image sensor 2-1. The movable lens barrel 2-5 is placed within this cylindrical hole and is threadedly connected to the screw of the motor 2-9. The motor 2-9 is fixed to one side of the bottom of the guide rail 2-4, the photoelectric sensor 2-10 is fixed to the other side of the bottom of the guide rail 2-4, and the motor control board 2-11 is fixed to the top of the guide rail 2-4 and electrically connected to the motor 2-9;

[0083] During operation, the motor 2-9 drives the movable lens barrel 2-5 to move axially along the guide rail 2-4, and feeds back position information through the photoelectric sensor 2-10 to achieve automatic focusing of the CMOS image sensor 2-1. The rubber button 1-5 is provided with a button for controlling the automatic focusing function.

[0084] Optionally, the rubber button 1-5 is made of high-density silicone rubber. Its bottom is snapped into the slot at the top of the front housing 1-1 and fixed by a button fixing member 1-4, playing a role in waterproof sealing; The surface of the rubber button 1-5 is provided with anti-slip texture to enhance the feel and control force during operation.

[0085] Optionally, the housing assembly 1 further includes a tail fixing member 1-6, a tail nut buckle 1-7, a filter 1-8, and a wire harness rubber 1-9. The tail fixing member 1-6 and the tail nut buckle 1-7 connect and fix the rear housing 1-2 to the power supply wire harness. The filter 1-8 and the wire harness rubber 1-9 are sleeved on the power supply wire harness, playing a role in shielding stray light and waterproof sealing.

[0086] Optionally, the front end of the front housing 1-1 is provided with a circular counterbore for installing the filter 1-8. The filter 1-8 is fixed to the bottom surface of the circular counterbore by medical glue to achieve light filtering and sealing.

[0087] Optionally, a sealing ring groove and a sealing ring are provided between the front housing 1-1 and the rear housing 1-2. The inner rear housing 1-3 is fixed to the front housing 1-1 by screws. The tail end cross-section of the front housing 1-1 is provided with a sealing ring groove for sealing the rear end of the handle cavity. The entire housing assembly 1 has waterproof sealing performance to meet the strict cleaning requirements of medical devices.

[0088] Optionally, the CMOS-motor assembly 2 further includes a lens barrel screw 2-6, a guide rod joint 2-7, and a motor push rod 2-8. The movable lens barrel 2-5 is connected to the guide rod joint 2-7 by the lens barrel screw 2-6 and is threadedly connected to the screw of the motor 2-9 by the motor push rod 2-8. The forward and reverse rotations of the motor 2-9 drive the movable lens barrel 2-5 to axially move along the guide rail 2-4. It should be noted that the design of the lens barrel screw 206, the guide rod joint 2-7, and the motor push rod 2-8 in the CMOS-motor assembly 2 drives the movable lens barrel 2-5 to axially move along the guide rail 2-4 through the forward and reverse rotations of the motor. The technical effect of this design is that it significantly improves the focusing accuracy and response speed of the movable lens barrel 2-5, ensuring the clarity of the laparoscopic image during the operation. With this structure, the movable lens barrel 2-5 can achieve precise focusing adjustment in an extremely short time, reducing the dependence on manual focusing and enhancing the applicability and reliability of the device in a complex surgical environment. Further, those skilled in the art can determine the specific shapes and dimensional parameters of the above components according to the above description in combination with conventional mechanical design means without creative efforts. To avoid redundancy, they are not listed one by one here.

[0089] Optionally, a cylindrical step is provided at the front end of the guide rail 2-4 for positioning with the round hole at the front end of the front housing 1-1; the guide rail 2-4 is made of wear-resistant alloy to ensure the smooth movement and durability of the movable lens barrel 2-5 during long-term use.

[0090] Optionally, three holes are provided on the right side of the CMOS image sensor 2-1. The middle one is a threaded hole for fixation, and the upper and lower ones are positioning holes for positioning; two positioning posts and a through hole are provided on one side of the tail end of the guide rail 2-4 for assembling and positioning with the CMOS image sensor 2-1.

[0091] Optionally, the CMOS image sensor 2-1 is connected and positioned with the guide rail 2-4 through positioning posts and positioning holes, and is fixed and cooled by the L-shaped bracket 2-2 and the heat dissipation copper sheet 2-3; the heat dissipation copper sheet 2-3 conducts the heat generated by the CMOS image sensor 2-1 to the housing assembly 1 to achieve effective heat dissipation.

[0092] Optionally, the photoelectric sensor 2-10 includes two photoelectric sensor elements for sensing the position of the guide rod joint 2-7; the photoelectric sensor 2-10 detects the position information of the movable lens barrel 2-5 and transmits a feedback signal to the motor control board 2-11, and precise positioning is achieved through closed-loop control. It should be noted that the position detection function of the photoelectric sensor 2-10 enables the position of the movable lens barrel 2-5 to be fed back to the motor control board 2-11 in real time, and precise positioning is achieved through closed-loop control. The technical effect of this design is to achieve high precision and stability during the autofocus process, and to avoid image blurring caused by deviation of the focusing position. The feedback mechanism of the photoelectric sensor 2-10 ensures high-precision control of the movable lens barrel 2-5 during focal length adjustment, enabling the image sensor to continuously provide clear images of the abdominal cavity, greatly improving the safety and efficiency of surgical operations. Further, those skilled in the art can determine the specific shapes and dimensional parameters of the above components according to the above description, in combination with conventional mechanical design means, without creative efforts. To avoid redundancy, they are not listed one by one here.

[0093] Optionally, the motor control board 2-11 is fixed to the top of the guide rail 2-4 through a control board connector 2-12 and is electrically connected to the motor 2-9; the motor control board 2-11 includes a microprocessor for processing the signals of the photoelectric sensor 2-10 and controlling the rotation direction and speed of the motor 2-9 to optimize the focusing speed and accuracy.

[0094] Optionally, the central cylindrical hole of the guide rail 2-4 is coaxially arranged with the CMOS image sensor 2-1 to ensure that the moving path of the movable lens barrel 2-5 is aligned with the optical axis of the CMOS image sensor 2-1 to maintain the focusing accuracy of the image.

[0095] Optionally, two installation positions are provided at the bottom of the guide rail 2-4, one side for fixing the motor 2-9 and the other side for fixing the photoelectric sensor 2-10 to ensure the coordinated cooperation of motor drive and position sensing.

[0096] Optionally, threaded holes are provided at the top of the guide rail 2-4 for fixing the control board connector 2-12, and the control board connector 2-12 is used to support the motor control board 2-11 to achieve stable motor control.

[0097] Optionally, micro lubrication grooves are provided on the inner wall of the guide rail 2-4 to reduce the friction during the movement of the movable lens barrel 2-5, thereby improving the smoothness and accuracy of focusing.

[0098] Optionally, the guide rail 2-4 is manufactured by a precision machining process, and a gap of 0.01-0.05 mm is maintained between its inner diameter and the outer diameter of the movable lens barrel 2-5 to ensure the smooth movement of the movable lens barrel 2-5 and the focusing accuracy.

[0099] Optionally, limit structures are provided at the front end and the tail end of the guide rail 2-4 to limit the movement range of the movable lens barrel 2-5, so as to prevent structural damage or focus misalignment caused by excessive movement.

[0100] Optionally, the guide rail 2-4 is made of wear-resistant composite material, which has high strength and low friction characteristics, so as to extend the service life of the guide rail and ensure the smooth movement of the movable lens barrel 2-5.

[0101] Optionally, heat dissipation fins are provided on the outer surface of the guide rail 2-4 to enhance the heat dissipation capacity of the guide rail, so as to prevent the CMOS image sensor 2-1 from overheating in a high-temperature environment.

[0102] Working principle:

[0103] The operation of this autofocus laparoscope camera handle structure is based on the coordinated operation among the CMOS image sensor, the motor, the guide rail system and the photoelectric sensor. The built-in CMOS image sensor 2-1 in the handle is responsible for capturing the image signals in the abdominal cavity and transmitting them to an external display for doctors to observe in real time. To ensure the clarity of the images during the operation, this structure introduces an autofocus function.

[0104] When the handle is used during the operation, after the motor 2-9 receives the signal transmitted by the motor control board 2-11, it drives the motor push rod 2-8 to drive the movable lens barrel 2-5 to move along the axial direction of the guide rail 2-4. The movement of the movable lens barrel 2-5 adjusts the light focus entering the CMOS image sensor 2-1, thereby changing the image focus point.

[0105] During this process, the photoelectric sensor 2-10 monitors the position information of the movable lens barrel 2-5 in real time and feeds back the detected position signal to the motor control board 2-11. The motor control board analyzes these feedback signals to determine the rotation direction and speed of the motor, thereby achieving precise positioning of the movable lens barrel. Through this closed-loop control system, the movable lens barrel can automatically adjust the focus according to different optical conditions to ensure that the CMOS image sensor always maintains the best focus state.

[0106] Doctors can manually control the enabling or disabling of the autofocus function through the rubber button 1-5 on the handle. In addition, the design of the handle also takes ergonomics into consideration, making the operation more comfortable. At the same time, through a multi-layer sealing structure, the waterproof and dustproof performance of the handle in the surgical environment is ensured.

[0107] To sum up, this autofocus laparoscope camera handle realizes the autofocus function by controlling the movement of the lens barrel with a motor, greatly improving the accuracy and safety of the operation. At the same time, it reduces the operation burden of doctors and improves the operation efficiency.

[0108] More specifically, the working principle of this autofocus laparoscope camera handle structure is a precise and efficient process involving the coordinated operation of multiple components. First of all, the core of the entire system is the CMOS-motor component, which is ingeniously installed within the housing component. In this component, the CMOS image sensor is firmly fixed to the guide rail through its own positioning holes and threaded holes, while the movable lens barrel is installed within the central cylindrical hole of the guide rail. The motor, photoelectric sensor, and motor control board are also respectively fixed at specific positions on the guide rail, forming a compact and fully functional system.

[0109] When the system is powered on, the entire device is powered through the power supply harness at the tail. The microprocessor on the motor control board is immediately initialized and ready to receive and process various signals. The CMOS image sensor starts to work and receives the optical signals from the laparoscope through the front-end filter. This filter plays a role in filtering out unnecessary light, effectively improving the image quality.

[0110] The autofocus process is the core function of this device. When the user triggers the focus process by pressing the autofocus function key on the rubber button, the CMOS image sensor transmits the captured image information to the motor control board. The microprocessor on the control board then analyzes the image sharpness to determine whether the focal length needs to be adjusted. If adjustment is required, the microprocessor issues an instruction to control the rotation of the motor.

[0111] The rotation of the motor achieves the focal length adjustment through a series of ingenious mechanical transmissions. Specifically, the screw of the motor drives the movable lens barrel to move on the guide rail through the motor push rod and the guide rod joint. The movement of the movable lens barrel changes the optical path length, thereby achieving the adjustment of the focal length. During this process, the photoelectric sensor continuously detects the position of the movable lens barrel and feeds back the position information to the motor control board, forming an accurate closed-loop control system.

[0112] The motor control board continuously adjusts the rotation direction and speed of the motor based on the image sharpness and position feedback. Through multiple fine-tuning operations, the optimal focal length position is finally achieved, ensuring the clarity and stability of the image. This autofocus mechanism can quickly and precisely adjust the focal length, providing doctors with clear abdominal cavity images and greatly improving the accuracy and efficiency of the surgery.

[0113] During the entire working process, heat management is also an important aspect. The heat generated by the CMOS image sensor during operation is conducted to the housing component through the heat dissipation copper sheet. The medical aluminum alloy material used for the housing component has good heat dissipation performance, effectively maintaining the normal operating temperature of the device and ensuring the stability during long-term use.

[0114] In addition, this laparoscopic camera handle structure also has an excellent sealing and protection design. The multiple sealing designs of the housing assembly, including the sealing ring, rubber button, and tail seal, ensure the waterproof performance of the device. This sealing design enables the device to meet the strict cleaning requirements of medical devices, greatly improving the use safety and the service life of the device.

[0115] In summary, through precise mechanical design, advanced electronic control, and a user-friendly operation interface, this autofocus laparoscopic camera handle structure achieves efficient and accurate autofocus function. At the same time, its ergonomic design and waterproof sealing characteristics ensure the comfort and reliability of the device during long-term use, providing strong technical support for laparoscopic surgery.

[0116] It should be noted that the autofocus function of this application is realized through the integration of a set of precise mechanical and electronic systems. The coaxial arrangement of the specially designed guide rail 2-4 structure and the CMOS image sensor 2-1 ensures that the movable lens barrel 2-5 always remains aligned with the optical axis of the image sensor during movement. This design significantly reduces image blurring caused by the offset of the lens barrel position and enhances the accuracy of autofocus.

[0117] Furthermore, the inner wall of the guide rail 2-4 is provided with micro lubrication grooves. Combined with the wear-resistant materials used, the frictional force of the movable lens barrel 2-5 during movement is reduced to the lowest level, thereby improving the response speed and smoothness of focusing. Compared with traditional mechanical focusing systems, this application realizes precise control and rapid adjustment of the position of the movable lens barrel 2-5 through the precise control of the drive of the motor 2-9 and the real-time feedback of the photoelectric sensor 2-10. This design not only simplifies the operation of doctors during the surgery but also greatly improves the clarity of the surgical image. Especially in complex laparoscopic surgeries, it can effectively reduce the operation burden of doctors.

[0118] In addition, the autofocus system of this application can complete the focusing adjustment within an extremely short time through the integrated closed-loop control circuit without the need for doctors to interrupt the surgical process for manual intervention. By accurately positioning the motor and photoelectric sensor at the bottom of the guide rail 2-4, the compactness and reliability of the entire focusing system are ensured, avoiding the focusing errors and response delays caused by unreasonable component layout in conventional designs.

[0119] Through the above structural and system designs, this application not only surpasses the prior art in terms of focusing accuracy and speed but also demonstrates significant advantages in enhancing the convenience and reliability of medical operations. This innovative autofocus design has not been seen in the existing laparoscopic camera handle structures and has significant technological progressiveness and creativity.

[0120] The advantages of the above embodiments are as follows:

[0121] Optional, autofocus function: By integrating a CMOS image sensor and a motor control system, the handle can automatically adjust the position of the lens barrel according to the focal length requirements during the operation, thus realizing the autofocus function of the image. This reduces the frequency of manual focus adjustment by doctors to a certain extent, reduces the operation complexity, and helps to maintain the clarity of the image. However, the accuracy and speed of autofocus may be restricted by the specific operating environment and device settings. Especially in poor lighting conditions or complex intra-abdominal environments, the effects may vary.

[0122] Optional, ergonomic design: The shape design of the handle conforms to ergonomics, aiming to improve the comfort of doctors during operation. By optimizing the structure and materials of the handle, the handle can reduce the fatigue caused by long-term operation by doctors during use, and improve the stability and accuracy of operation. However, due to individual differences in doctors' hand shapes and usage habits, the design effects of the handle may vary among different users.

[0123] Optional, sealing performance: The outer shell assembly of the handle adopts a multi-layer sealing design, which can prevent the infiltration of liquid or other substances during the operation to a certain extent, and meets the cleaning and disinfection requirements of medical devices. However, the sealing performance of the handle depends on the assembly accuracy of components such as sealing rings and filters, and the durability of materials. Maintenance or replacement may be required after long-term use.

[0124] Optional, heat dissipation performance: The CMOS image sensor conducts the generated heat to the handle shell through a heat dissipation copper sheet to maintain the normal operating temperature of the sensor. This heat dissipation design can meet the heat dissipation requirements of the sensor in general surgical environments and ensure the stable operation of the handle. However, in long-term or high-load surgeries, the heat dissipation effect of the handle may be limited, and additional cooling measures are required.

[0125] In summary, the autofocus laparoscope camera handle structure of the present application provides certain convenience and operation stability during surgical operations, but its effects are affected by specific usage environments and conditions. Through reasonable use and maintenance, the operation experience and image quality of the surgery can be improved to a certain extent.

[0126] To better understand the technical solution of the present application, a specific example is given below for illustration. The details listed in this example are mainly for easy understanding and do not limit the protection scope of the present application.

[0127] This example proposes an autofocus laparoscope camera handle structure, as Figure 1 shown. This structure includes the components of the autofocus laparoscope camera handle. The front end of the handle is connected to the rigid endoscope of the laparoscope system (not shown), and the rear end is connected to the power supply wire harness of the laparoscope system (not shown). As Figure 2As shown, the component includes a housing component 1 and a CMOS-motor component 2, and the CMOS-motor component 2 is fixed within the housing component 1.

[0128] As Figure 3 shown, the component is subdivided into a front housing 1-1, a rear housing 1-2, an inner rear housing liner 1-3, a button fixing part 1-4, a rubber button 1-5, a tail fixing part 1-6, a tail nut buckle 1-7, a filter 1-8, a wire-bundling rubber 1-9, a CMOS 2-1, an L-shaped bracket 2-2, a heat dissipation copper sheet 2-3, a guide rail 2-4, a movable lens barrel 2-5, a lens barrel screw 2-6, a guide rod joint 2-7, a motor push rod 2-8, a motor 2-9, a photoelectric sensor 2-10, a motor control board 2-11, and a control board connecting part 2-12. The structure of the housing component 1 conforms to ergonomics and is composed of the front housing 1-1 and the rear housing 1-2. The front end face is flat, and the remaining cross-sections adopt a curved surface shape, presenting an overall streamline shape with a slightly downward swing at the tail end. Concave shapes are designed on both sides of the front housing 1-1. The overall shape takes into account the hand shape and holding habits of adult doctors, ensuring that the handle can naturally fit with the doctor's palm and reducing unnecessary muscle tension. The front housing 1-1 and the rear housing 1-2 are made of medical aluminum alloy 6061, ensuring structural strength while reducing weight. In addition, the CMOS component 2 is fixed within the front housing 1-1, and the weight of the entire handle structure is concentrated at the front end. When holding the handle, a doctor can better apply force by clamping the concave parts on both sides of the front housing 1-1 with two fingers, providing sufficient grip and anti-slip properties. At the same time, the rubber button 1-5 is located at the top of the front housing 1-1. When the doctor holds the handle tightly, the thumb can easily press the rubber button 1-5, reducing the fatigue of the palm and wrist during long-term use and improving the operation accuracy.

[0129] As Figure 4As shown in the figure, a button fixing part 1-4 and a rubber button 1-5 are fixed on the top of the front housing 1-1. The rubber button 1-5 is made of high-density silicone rubber. The bottom of the button is stuck in the groove on the top of the front housing 1-1, sealing the top of the handle. The button fixing part 1-4 is fixed on the top of the front housing 1-1 by screws and fixes the rubber button 1-5. The marks on the rubber button 1-5 represent different working modes of the CMOS 2-1, where "F" represents Focus. The rear inner housing 1-3 of the housing is fixed to the front housing 1-1 by screws. The rear end section of the front housing 1-1 is provided with a sealing ring groove. The front end section of the rear inner housing 1-3 of the housing is slightly smaller than the rear end section of the front housing 1-1 and is fixed to the rear end of the front housing 1-1 by screws, covering the sealing ring groove on the rear end section of the front housing 1-1 to achieve the sealing of the rear end of the handle cavity. The rear end of the rear inner housing 1-3 is fixed to the tail fixing part 1-6 by screws. The tail fixing part 1-6 fixes the wire-binding rubber 1-9 through a rubber coating process. The wire-binding rubber 1-9 is fixed to the power supply wire harness (not shown) through a rubber coating process, providing a second layer of sealing for the tail of the handle. A circular counterbore is opened at the front end of the front housing 1-1 for receiving the optical signal of the CMOS 2-1. The filter 1-8 is placed on the bottom surface of the counterbore for filtering the optical signal. The filter 1-8 is adhered to the bottom surface of the counterbore at the front end of the front housing 1-1 by medical glue to ensure the sealing of the front end of the handle. Therefore, the front end, top end, and rear end of the handle are all sealed, enabling it to meet the strict cleaning requirements of medical devices.

[0130] As Figure 5 shown, the CMOS component 2 is composed of a CMOS 2-1, an L-shaped bracket 2-2, a heat dissipation copper sheet 2-3, a guide rail 2-4, a movable lens barrel 2-5, lens barrel screws 2-6, a guide rod joint 2-7, a motor push rod 2-8, a motor 2-9, a photoelectric sensor 2-10, a motor control board 2-11, and a control board connector 2-12. The CMOS component 2 is positioned through the cylindrical step at the front end of the guide rail 2-4 and the round hole at the front end of the front housing 1-1, and then fixed to the front housing 1-1 by screws. The CMOS 2-1 is an image sensor used to process the image signals in the patient's abdominal cavity collected at the front end of the laparoscope. The L-shaped bracket 2-2 is used to fix the circuit board on the left side of the CMOS 2-1. The heat dissipation copper sheet 2-3 conducts the heat generated during the operation of the CMOS 2-1 to the handle housing for heat dissipation. As Figure 5 shown, there are three holes on the right side of the CMOS 2-1. The middle one is a threaded hole for fixing, and the upper and lower ones are positioning holes for positioning. One side of the tail end of the guide rail 2-4 extends a step for assembling with the CMOS 2-1, and two positioning posts and a through hole are provided on the step. During installation, it is necessary to first position the two positioning posts on one side of the tail end of the guide rail 2-4 with the two positioning holes on the right side of the CMOS 2-1 to ensure that the light received by the image sensor of the CMOS 2-1 passes through the central cylindrical hole of the guide rail 2-4, and then fix the CMOS 2-1 and the guide rail 2-4 with screws.

[0131] As shown Figure 5 in the figure, an active lens barrel 2-5 is placed in the central cylindrical hole of the guide rail 2-4. The active lens barrel 2-5 is used to focus the received light and transmit the focused light to the image sensor of the CMOS 2-1. Therefore, the active lens barrel 2-5 is concentric with the central cylindrical hole of the guide rail 2-4. The active lens barrel 2-5 is provided with threaded holes for fixing the lens barrel screws 2-6. The other end of the lens barrel screw 2-6 is a counterbore for fixing the cylinder of the guide rod joint 2-7. The other end of the guide rod joint 2-7 is connected to the motor push rod 2-8. The motor push rod 2-8 is provided with a threaded through hole that is threadedly engaged with the screw rod of the motor 2-9. The motor 2-9 is directly fixed to one side of the bottom of the guide rail 2-4 by screws. An optoelectronic sensor 2-10 is fixed to the other side of the bottom of the guide rail 2-4. The optoelectronic sensor 2-10 includes two optoelectronic sensor components for sensing the guide rod joint 2-7. The top of the guide rail 2-4 is provided with threaded holes for fixing the control board connector 2-12. The control board connector 2-12 fixes the motor control board 2-11 by screws.

[0132] As shown Figure 6 in the figure, when the motor 2-9 operates, its screw rod rotates self - sufficiently, pushing the motor push rod 2-8 to move back and forth. The guide rod joint 2-7 moves synchronously, driving the lens barrel screw 2-6 and the active lens barrel 2-5 to move in the central cylindrical hole of the guide rail 2-4. The optoelectronic sensor 2-10 senses the L-shaped metal structure extended by the guide rod joint 2-7 to determine the movement of the active lens barrel 2-5 and control its back - and - forth movement range. In this way, when the CMOS 2-1 receives light from different reflecting surfaces, the motor 2-9 can control the movement of the active lens barrel 2-5 to achieve the autofocus function. The doctor only needs to press the "F" key on the rubber button 1-5 at the top of the front shell 1-1 to complete the operation.

[0133] It should be noted that all the documents mentioned in this application are cited in this application as references, just as if each document was cited separately as a reference. In addition, it should be understood that after reading the above teachings of this application, those skilled in the art can make various changes or modifications to this application, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0134] Also, in the claims and the specification of this patent, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an" does not exclude the presence of additional identical elements in the process, method, article or device comprising said element. In the claims and the specification of this patent, if it is mentioned that an act is performed according to a certain element, it means that the act is performed at least according to that element, including two cases: performing the act only according to that element and performing the act according to that element and other elements.

[0135] Although this application has been illustrated and described by reference to certain preferred embodiments thereof, those of ordinary skill in the art should understand that various changes in form and detail may be made therein without departing from the spirit and scope of this application.

Claims

1. An autofocus laparoscope camera handle structure, characterized in that, Comprising: A housing assembly (1), the housing assembly (1) includes a front housing (1-1), a rear housing (1-2), a rear inner liner of the housing (1-3), a button fixing member (1-4) and a rubber button (1-5). Concave structures are provided on both sides of the front housing (1-1), and a groove structure for accommodating the rubber button (1-5) is provided at the top. A CMOS-motor assembly (2), fixed within the housing assembly (1). The CMOS-motor assembly (2) includes a CMOS image sensor (2-1), an L-shaped bracket (2-2), a heat dissipation copper sheet (2-3), a guide rail (2-4), a movable lens barrel (2-5), a motor (2-9), a photoelectric sensor (2-10) and a motor control board (2-11). The CMOS image sensor (2-1) is fixed through the L-shaped bracket (2-2) and the heat dissipation copper sheet (2-3). A cylindrical hole coaxial with the CMOS image sensor (2-1) is provided at the center of the guide rail (2-4). The movable lens barrel (2-5) is placed within the cylindrical hole and is threadedly connected to the screw of the motor (2-9). The motor (2-9) is fixed to one side of the bottom of the guide rail (2-4), the photoelectric sensor (2-10) is fixed to the other side of the bottom of the guide rail (2-4), and the motor control board (2-11) is fixed to the top of the guide rail (2-4) and is electrically connected to the motor (2-9). During operation, the motor (2-9) drives the movable lens barrel (2-5) to axially move along the guide rail (2-4), and feeds back position information through the photoelectric sensor (2-10) to achieve automatic focusing of the CMOS image sensor (2-1). The rubber button (1-5) is provided with a button for controlling the automatic focusing function.

2. The automatic focusing laparoscope camera handle structure according to claim 1, characterized in that, The rubber button (1-5) is made of high-density silicone rubber. Its bottom is snapped into the groove at the top of the front housing (1-1) and is fixed by the button fixing member (1-4) to play a role in waterproof sealing. The surface of the rubber button (1-5) is provided with anti-slip textures to enhance the hand feeling and control force during operation.

3. The automatic focusing laparoscope camera handle structure according to claim 1, characterized in that, The housing assembly (1) further includes a tail fixing member (1-6), a tail nut buckle (1-7), a filter (1-8) and a wire harness rubber (1-9). The tail fixing member (1-6) and the tail nut buckle (1-7) connect and fix the rear housing (1-2) to the power supply wire harness. The filter (1-8) and the wire harness rubber (1-9) are sleeved on the power supply wire harness to play a role in shielding stray light and waterproof sealing.

4. The autofocus laparoscope camera handle structure according to claim 3, wherein, A circular counterbore is provided at the front end of the front housing (1-1) for installing the filter (1-8). The filter (1-8) is fixed to the bottom surface of the circular counterbore by medical glue to achieve light filtering and sealing.

5. The autofocus laparoscope camera handle structure according to claim 1, characterized in that, A sealing ring groove and a sealing ring are provided between the front housing (1-1) and the rear housing (1-2). The rear inner liner of the housing (1-3) is fixed to the front housing (1-1) by screws. A sealing ring groove is provided at the cross-section of the tail end of the front housing (1-1) for sealing the rear end of the handle cavity. The overall housing assembly (1) has waterproof sealing performance to meet the strict cleaning requirements of medical devices.

6. The automatic focusing laparoscope camera handle structure according to claim 1, characterized in that, The CMOS-motor assembly (2) further includes a lens barrel screw (2-6), a guide rod joint (2-7), and a motor push rod (2-8). The movable lens barrel (2-5) is connected to the guide rod joint (2-7) by the lens barrel screw (2-6) and is threadedly connected to the screw of the motor (2-9) by the motor push rod (2-8). The forward and reverse rotations of the motor (2-9) drive the movable lens barrel (2-5) to axially move along the guide rail (2-4).

7. The autofocus laparoscope camera handle structure according to claim 1 or 6, characterized in that, The front end of the guide rail (2-4) is provided with a cylindrical step for positioning with the circular hole at the front end of the front housing (1-1); the guide rail (2-4) is made of wear-resistant alloy to ensure the smooth movement and durability of the movable lens barrel (2-5) during long-term use.

8. The autofocus laparoscope camera handle structure according to claim 1, characterized in that, On the right side of the CMOS image sensor (2-1), there are three holes. The middle one is a threaded hole for fixation, and the upper and lower ones are positioning holes for positioning; on one side of the tail end of the guide rail (2-4), there are two positioning posts and a through hole for assembling and positioning with the CMOS image sensor (2-1).

9. The automatic focusing laparoscope camera handle structure according to claim 1, wherein The CMOS image sensor (2-1) is connected and positioned with the guide rail (2-4) through the positioning posts and positioning holes, and is fixed and cooled by the L-shaped bracket (2-2) and the heat dissipation copper sheet (2-3); the heat dissipation copper sheet (2-3) conducts the heat generated by the CMOS image sensor (2-1) to the housing assembly (1) to achieve effective heat dissipation.

10. The automatic focusing laparoscope camera handle structure according to claim 1, wherein, The photoelectric sensor (2-10) includes two photoelectric sensor elements for sensing the position of the guide rod joint (2-7); the photoelectric sensor (2-10) detects the position information of the movable lens barrel (2-5) and transmits the feedback signal to the motor control board (2-11) to achieve precise positioning through closed-loop control.

11. The automatic focusing laparoscope camera handle structure according to claim 1 or 10, characterized in that, The motor control board (2-11) is fixed on the top of the guide rail (2-4) through the control board connecting piece (2-12) and is electrically connected to the motor (2-9); the motor control board (2-11) includes a microprocessor for processing the signals of the photoelectric sensor (2-10) and controlling the rotation direction and speed of the motor (2-9) to optimize the focusing speed and accuracy.

12. The autofocus laparoscope camera handle structure according to claim 1, characterized in that, The central cylindrical hole of the guide rail (2-4) is coaxially arranged with the CMOS image sensor (2-1) to ensure that the moving path of the movable lens barrel (2-5) is aligned with the optical axis of the CMOS image sensor (2-1) to maintain the focusing accuracy of the image.

13. The autofocus laparoscope camera handle structure according to claim 1 or 12, characterized in that, On the bottom of the guide rail (2-4), there are two installation positions. One side is for fixing the motor (2-9), and the other side is for fixing the photoelectric sensor (2-10) to ensure the coordinated cooperation of motor drive and position sensing.

14. The automatic focusing laparoscope camera handle structure according to claim 1, wherein, The inner wall of the guide rail (2-4) is provided with micro lubricating grooves for reducing the friction during the movement of the movable lens barrel (2-5), thereby improving the smoothness and accuracy of focusing.

15. The automatic focusing laparoscope camera handle structure according to claim 1, characterized in that, The front end and the tail end of the guide rail (2-4) are provided with limiting structures for restricting the moving range of the movable lens barrel (2-5) to prevent structural damage or focusing misalignment caused by excessive movement.

16. The automatic focusing laparoscope camera handle structure according to claim 1, wherein, The guide rail (2-4) is made of wear-resistant composite material, which has high strength and low friction characteristics to extend the service life of the guide rail and ensure the smooth movement of the movable lens barrel (2-5).

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