A calibration structure for lens focal length adjustment

Abstract

The utility model provides a kind of for lens focal length adjustment's calibration structure, it is related to lens focal length calibration structure equipment technical field, including camera main body, camera main body bottom is equipped with charging port, camera main body inside is equipped with first component slot, first component slot inner wall is fixed with first fixed plate and second fixed plate, first component slot inner wall is fixed with third fixed plate, first fixed plate side is rotatably connected with first threaded rod, first threaded rod other end is rotatably connected in third fixed plate side, second fixed plate side is rotatably connected with second threaded rod, second threaded rod other end is rotatably connected in third fixed plate side, first fixed plate and second fixed plate side are all fixed with sliding rod, the other end of two sliding rods is fixed in third fixed plate side, first threaded rod and second threaded rod surface are rotatably connected with lens module group, lens module group slides on the surface of two sliding rods, and first threaded rod and second threaded rod are driven rotation by fine adjustment driving device.

Description

Technical Field

[0001] This utility model relates to the technical field of lens focal length calibration structure equipment, and in particular to a calibration structure for adjusting the focal length of a lens. Background Technology

[0002] The lens in a camera is a key optical element for achieving imaging. It usually has a specific curvature shape that can refract light. When light passes through the lens, the lens will converge or diverge the light according to its shape and material properties. This control of light allows the light from the subject to converge on the camera's image sensor to form a clear image. The optical properties of the lens, such as refractive index, transmittance, and surface quality, directly determine the image quality performance of the camera, such as the sharpness, color reproduction, and contrast. It is the core component of the camera that captures images and records beautiful moments, bearing the important mission of converting light into a visible image.

[0003] In existing technologies, the lack of a focal length adjustment and calibration structure in lenses leads to unstable image quality. Due to the inability to accurately calibrate the focal length, images may appear blurry or out of focus in different shooting scenarios. This is especially true when shooting objects at varying distances, making it difficult to quickly obtain a clear image. Secondly, it is not conducive to diverse shooting needs. The lack of a calibration structure makes it difficult to meet the shooting requirements of various focal length changes, from wide-angle to telephoto, limiting the application of cameras in different fields such as landscapes, portraits, and sports events. Furthermore, for some high-precision shooting tasks, such as scientific research observation and industrial inspection, the inability to accurately adjust the focal length will seriously affect the accuracy of measurement and recording, reducing work efficiency and reliability. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a calibration structure for adjusting the focal length of a lens.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a calibration structure for adjusting lens focal length, comprising a camera body, a charging port at the bottom of the camera body, a first component slot inside the camera body, a first fixing plate and a second fixing plate fixed to the inner wall of the first component slot, a third fixing plate fixed to the inner wall of the first component slot, a first threaded rod rotatably connected to one side of the first fixing plate, the other end of the first threaded rod rotatably connected to one side of the third fixing plate, a second threaded rod rotatably connected to one side of the second fixing plate, the other end of the second threaded rod rotatably connected to one side of the third fixing plate, sliding rods fixed to one side of both the first and second fixing plates, the other ends of the two sliding rods fixed to one side of the third fixing plate, a lens module rotatably connected to the surfaces of the first and second threaded rods, the lens module sliding on the surfaces of the two sliding rods, and the first and second threaded rods being driven to rotate by a fine-tuning drive device.

[0006] Preferably, two support blocks are fixed on one side of the camera body, and a protective cover is rotatably connected to one side of the two support blocks. A buckle seat is fixed on one side of the protective cover. A second component groove is opened on one side of the camera body. Multiple sliding grooves are opened on the inner wall of the second component groove. Two buckle shafts are provided on the inner wall of the second component groove. Sliding blocks are fixed at both ends of the two buckle shafts. The sliding blocks slide on the inner wall of the sliding groove. Springs are fixed on both sides of the sliding blocks. The other end of the springs is fixed to the inner wall of the sliding groove. In existing technologies, the lack of an external protective structure for camera lenses presents numerous drawbacks. The lenses are directly exposed, making them susceptible to corrosion from environmental factors such as dust, dirt, and moisture, leading to surface contamination, affecting image quality, and causing problems like blurriness and glare. Furthermore, in daily use, lenses are easily damaged by impacts and scratches, increasing repair costs and potentially rendering the camera unusable, thus shortening its lifespan. In addition, the lack of a protective structure makes it difficult for the lens to maintain optimal performance in harsh environments, such as outdoor adventures and extreme weather, limiting the camera's applicability and usage scenarios, and reducing its reliability and practicality in complex environments. To address these issues, this invention employs an external lens protection structure. A protective cover is rotatably connected to the camera body via a support block, allowing for free opening and closing. When the protective cover is closed, its latching seat engages with a latching shaft for fixation. Sliding blocks at both ends of the latching shaft... Sliding within the sliding groove, the spring provides elastic force, ensuring a tight fit between the latch seat and the latch shaft, thus firmly securing the protective cover and protecting the lens. When the protective cover needs to be opened, the spring force is overcome, allowing the sliding block to slide within the sliding groove, separating the latch seat from the latch shaft, and the protective cover can then be opened for convenient use of the lens for shooting. This significantly improves the lens's protective performance, effectively preventing environmental factors such as dust, stains, and moisture from corroding the lens, keeping the lens surface clean, thereby ensuring stable image quality and avoiding problems such as blurring and glare. At the same time, the protective structure can resist impacts and scratches, reducing the risk of lens damage, lowering maintenance costs, and extending the camera's lifespan. In harsh environments such as outdoor adventures and extreme weather, the protective structure ensures that the lens remains in good working condition, expanding the camera's applicability and usage scenarios, enhancing its reliability and practicality in complex environments, and meeting users' shooting needs in various scenarios.

[0007] Preferably, the fine-tuning drive device includes a first gear, a second gear, a third gear, and a motor. The first gear is fixed to the surface of a first threaded rod, the second gear is fixed to the surface of a second threaded rod, and the third gear meshes with the surfaces of the first and second gears. The third gear is driven to rotate by the motor, which is fixed to one side of a third fixed plate. The diameters of the first and second gears are equal, with the diameter of the first gear being larger than that of the third gear. In the prior art, the inability to fine-tune camera lens adjustments has significant drawbacks. During shooting, the lens position cannot be precisely controlled to adapt to subtle changes in shooting requirements, resulting in insufficient imaging accuracy. When shooting fine objects or scenes requiring precise focusing, it is difficult to obtain ideal clarity and detail. Furthermore, for scenes requiring rapid focus adjustment to capture fleeting moments, the lack of fine-tuning functionality significantly reduces the camera's response speed and adaptability, affecting shooting results and user experience, and limiting the camera's application range and shooting quality in professional photography. To address these issues, this invention adopts a fine-tuning structure where the motor drives the third gear to rotate. Since the diameter of the third gear is smaller than that of the first and second gears, according to the gear transmission principle, when the smaller gear drives the larger gear, the rotational speed of the larger gear will decrease. Because the rotation speed of the first and second gears is lower than that of the third gear, the rotation speed of the first and second gears is slower than that of the third gear. Since the first and second gears are fixed to the surfaces of the first and second threaded rods respectively, the rotation of the threaded rods will drive the lens module to move. Due to the difference in gear speed, the movement speed of the lens module will be relatively slow, thus achieving slow and fine focus adjustment. This significantly improves the camera's shooting performance and user experience. Through fine focus adjustment, the camera can accurately control the lens position in various shooting scenarios to meet subtle changes in shooting needs, thereby providing higher imaging accuracy. This allows fine objects and scenes requiring precise focus to present ideal clarity and rich details. In scenarios where it is necessary to quickly capture fleeting moments, the fine-tuning function ensures that the camera can quickly and accurately adjust the focus.

[0008] Preferably, the lens module includes a front bracket, with multiple clamping blocks fixed to one side of the front bracket, a lens body disposed on one side of the front bracket, and a rear bracket fixed to one side of the multiple clamping blocks. The design of the lens module, through the structure of the front bracket, clamping blocks, and rear bracket, enables stable fixation of the lens body. The clamping blocks not only provide reliable support but also ensure that the lens body maintains a precise position and angle during adjustment, preventing displacement due to vibration or external force. This structure enhances the overall stability and reliability of the lens module, allowing the lens to maintain good optical performance even after prolonged use or in complex environments.

[0009] Preferably, a first magnet is fixed to one side of the protective cover, and a second magnet is fixed to one side of the camera body. This enables magnetic attraction between the protective cover and the camera body. When using the camera, the protective cover can be easily opened and attached to one side of the camera body without affecting shooting due to shaking or loosening.

[0010] Preferably, the inner wall of the charging port is provided with a dustproof plug, and a dustproof plug seat is fixed to the bottom of the dustproof plug, with the dustproof plug seat located at the bottom of the camera body. By providing a dustproof plug on the inner wall of the charging port and fixing a dustproof plug seat to the bottom of the dustproof plug, dust, dirt, and moisture can be effectively prevented from entering the charging port. The dustproof plug can fit tightly against the inner wall of the charging port, forming a good sealing effect and preventing the intrusion of external impurities. The dustproof plug seat further enhances the fixing stability of the dustproof plug, ensuring that it will not loosen or fall off due to vibration or external force during camera use.

[0011] Preferably, the protective cover has a gripping groove on its surface, and the inner wall of the gripping groove has an inclined groove. This significantly improves the convenience and comfort of the user operating the protective cover. The gripping groove provides a clear gripping position, allowing the user to easily grasp the protective cover for opening and closing operations. The inclined groove design further increases the friction of the gripping groove, preventing slippage, especially when the cover is wet or the fingers are dirty, ensuring a stable grip and smooth operation.

[0012] Beneficial effects:

[0013] 1. In existing technologies, the lack of a focal length adjustment and calibration structure in lenses leads to unstable image quality. Due to the inability to accurately calibrate the focal length, images may appear blurry or out of focus in different shooting scenarios, especially when frequently switching between near and far objects, making it difficult to quickly obtain a clear image. Secondly, it is not conducive to diverse shooting needs. The lack of a calibration structure makes it difficult to meet the shooting requirements of various focal length changes from wide-angle to telephoto, limiting the application of the camera in different fields such as landscapes, portraits, and sports events. Furthermore, for some high-precision shooting tasks, such as scientific research observation and industrial inspection, the inability to accurately adjust the focal length will seriously affect the accuracy of measurement and recording. To address the issues of reduced work efficiency and reliability, this invention employs a lens focal length adjustment structure, which significantly improves image quality and ensures clear and stable images regardless of the distance of the object in different shooting scenarios. It meets the shooting needs of various focal length changes, from wide-angle to telephoto, enabling the camera to perform excellently in different fields such as landscapes, portraits, and sports events. For high-precision shooting tasks such as scientific research and industrial inspection, accurate focal length adjustment can improve the accuracy of measurement and recording, enhance work efficiency and reliability, thereby comprehensively improving the camera's performance and application range to meet diverse shooting needs.

[0014] 2. In existing technologies, the lack of an external protective structure for camera lenses presents numerous drawbacks. The lenses are directly exposed, making them susceptible to corrosion from environmental factors such as dust, dirt, and moisture, leading to surface contamination, affecting image quality, and causing problems like blurring and glare. Furthermore, in daily use, lenses are easily damaged by impacts and scratches, increasing repair costs and potentially rendering the camera unusable, thus shortening its lifespan. In addition, the lack of a protective structure makes it difficult for the lens to maintain optimal performance in harsh environments, such as outdoor adventures and extreme weather conditions, limiting the camera's applicability and usage scenarios, and reducing its reliability and performance in complex environments. To address these issues, this utility model employs an external lens protection structure, which significantly enhances the lens's protective performance. This effectively prevents environmental factors such as dust, dirt, and moisture from corroding the lens, keeping the lens surface clean and ensuring stable image quality. It also avoids problems like blurriness and glare. Simultaneously, the protective structure resists impacts and scratches, reducing the risk of lens damage, lowering maintenance costs, and extending the camera's lifespan. In harsh environments such as outdoor adventures and extreme weather, the protective structure ensures the lens remains in good working order, expanding the camera's applicability and usage scenarios, enhancing its reliability and practicality in complex environments, and meeting users' shooting needs in various scenarios.

[0015] 3. In existing technologies, the inability to fine-tune camera lenses presents significant drawbacks. During shooting, the inability to precisely control the lens position to adapt to subtle changes in shooting requirements leads to insufficient imaging accuracy. When shooting delicate objects or scenes requiring precise focusing, it is difficult to obtain ideal clarity and detail. Furthermore, for scenes requiring rapid focus adjustment to capture fleeting moments, the lack of fine-tuning significantly reduces the camera's response speed and adaptability, affecting shooting results and user experience, and limiting the camera's application range and shooting quality in professional photography. To address these issues, this invention employs a fine-tuning structure, significantly improving camera shooting performance and user experience. Through precise focus adjustment, the camera can accurately control the lens position in various shooting scenarios to meet subtle changes in shooting requirements, thereby providing higher imaging accuracy. This allows for the ideal clarity and rich detail in shooting delicate objects and scenes requiring precise focusing. In scenes requiring rapid capture of fleeting moments, the fine-tuning function ensures that the camera can quickly and accurately adjust the focus. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is an exploded view of the lens cap protective structure of this utility model;

[0018] Figure 3This is a cross-sectional view of the lens cover protection structure of this utility model;

[0019] Figure 4 This is a cross-sectional view of the fine-tuning structure of this utility model;

[0020] Figure 5 This is an exploded view of the fine-tuning structure of this utility model;

[0021] Figure 6 This is a three-dimensional structural diagram of the lens module bracket of this utility model;

[0022] Figure 7 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 8 for Figure 3 Enlarged view of point B in the middle.

[0024] Legend:

[0025] 1. Camera body; 101. First component slot; 102. First fixing plate; 103. Second fixing plate; 104. Third fixing plate; 105. First threaded rod; 106. Second threaded rod; 107. Sliding rod; 108. Lens module; 109. Charging port; 2. Support block; 201. Protective cover; 202. Buckle seat; 203. Second component slot; 204. Sliding groove; 205. Buckle shaft; 206. Sliding block; 207. Spring; 3. First gear; 301. Second gear; 302. Third gear; 303. Motor; 4. Front bracket; 401. Clamping block; 402. Lens body; 403. Rear bracket; 5. First magnet; 501. Second magnet; 6. Dust plug; 601. Dust plug seat; 7. Grip groove. Detailed Implementation

[0026] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0027] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific implementation examples:

[0029] Reference Figure 1-8A calibration structure for adjusting lens focal length includes a camera body 1. A charging port 109 is located at the bottom of the camera body 1. A first component slot 101 is formed inside the camera body 1. A first fixing plate 102 and a second fixing plate 103 are fixed to the inner wall of the first component slot 101. A third fixing plate 104 is also fixed to the inner wall of the first component slot 101. A first threaded rod 105 is rotatably connected to one side of the first fixing plate 102, and the other end of the first threaded rod 105 is rotatably connected to one side of the third fixing plate 104. The second fixing plate 103 is rotatably connected to one side of the third fixing plate 104. A second threaded rod 106 is connected, and the other end of the second threaded rod 106 is rotatably connected to one side of the third fixed plate 104. Sliding rods 107 are fixed to one side of both the first fixed plate 102 and the second fixed plate 103. The other ends of the two sliding rods 107 are fixed to one side of the third fixed plate 104. A lens module 108 is rotatably connected to the surface of the first threaded rod 105 and the second threaded rod 106. The lens module 108 slides on the surface of the two sliding rods 107. The first threaded rod 105 and the second threaded rod 106 are driven to rotate by a fine-tuning drive device. In existing technologies, the lack of a focal length adjustment and calibration structure in lenses leads to unstable image quality. Due to the inability to accurately calibrate the focal length, images may appear blurry or out of focus in different shooting scenarios, especially when frequently switching between near and far objects, making it difficult to quickly obtain a clear image. Secondly, it hinders diverse shooting needs; the lack of a calibration structure makes it difficult to meet the requirements of shooting with various focal lengths, from wide-angle to telephoto, limiting the camera's application in different fields such as landscapes, portraits, and sports events. Furthermore, for some high-precision shooting tasks, such as scientific observation and industrial inspection, the inability to accurately adjust the focal length will seriously affect the accuracy of measurement and recording, reducing work efficiency and reliability. To address these problems, this invention... The novel lens focal length adjustment structure uses a fine-tuning drive device to drive the first threaded rod 105 and the second threaded rod 106 to rotate. Since the lens module 108 is threadedly connected to these two threaded rods and the lens module 108 is restricted to moving only along the direction of the sliding rods by the two sliding rods 107, when the threaded rods rotate, the lens module 108 will move linearly along the direction of the sliding rods 107. This movement changes the position of the lens module 108 within the camera body 1, thereby realizing the adjustment of the focal length. By precisely controlling the fine-tuning drive device, the position of the lens module 108 can be finely adjusted, thereby completing the accurate calibration of the focal length and ensuring that the camera can obtain clear images at different shooting distances.

[0030] Two support blocks 2 are fixed on one side of the camera body 1. A protective cover 201 is rotatably connected to one side of the two support blocks 2. A buckle seat 202 is fixed on one side of the protective cover 201. A second component groove 203 is opened on one side of the camera body 1. Multiple sliding grooves 204 are opened on the inner wall of the second component groove 203. Two buckle shafts 205 are provided on the inner wall of the second component groove 203. Sliding blocks 206 are fixed at both ends of the two buckle shafts 205. The sliding blocks 206 slide on the inner wall of the sliding groove 204. Springs 207 are fixed on both sides of the sliding blocks 206. The other end of the springs 207 is fixed to the inner wall of the sliding groove 204. In existing technologies, the lack of a protective structure on the exterior of camera lenses presents numerous drawbacks. The lenses are directly exposed, making them susceptible to corrosion from environmental factors such as dust, dirt, and moisture, leading to surface contamination, affecting image quality, and causing problems like blurring and glare. Furthermore, in daily use, lenses are easily damaged by impacts and scratches, increasing repair costs and rendering the camera unusable, thus shortening its lifespan. In addition, the lack of a protective structure makes it difficult for the lens to maintain optimal performance in harsh environments, such as outdoor adventures and extreme weather conditions, limiting the camera's applicability and usage scenarios, and reducing its reliability and practicality in complex environments. To address these issues, this utility model adopts... The lens external protection structure includes a protective cover 201 that is rotatably connected to the camera body 1 via a support block 2, allowing it to open and close freely. When the protective cover 201 is closed, its latch seat 202 engages with the latch shaft 205 to secure it. The sliding blocks 206 at both ends of the latch shaft 205 slide within the sliding groove 204, and the spring 207 provides elastic force to ensure a tight fit between the latch seat 202 and the latch shaft 205, thereby firmly securing the protective cover 201 and protecting the lens. When it is necessary to open the protective cover 201, the elastic force of the spring 207 is overcome, causing the sliding blocks 206 to slide within the sliding groove 204, separating the latch seat 202 from the latch shaft 205, and allowing the protective cover 201 to be opened for convenient use of the lens for shooting.

[0031] The fine-tuning drive device includes a first gear 3, a second gear 301, a third gear 302, and a motor 303. The first gear 3 is fixed to the surface of the first threaded rod 105, the second gear 301 is fixed to the surface of the second threaded rod 106, and the third gear 302 meshes with the surfaces of the first gear 3 and the second gear 301. The third gear 302 is driven to rotate by the motor 303, which is fixed to one side of the third fixed plate 104. The diameters of the first gear 3 and the second gear 301 are equal, but the diameter of the first gear 3 is larger than the diameter of the third gear 302. In existing technologies, the inability to fine-tune camera lenses presents significant drawbacks. During shooting, the inability to precisely control the lens position to adapt to subtle changes in shooting requirements leads to insufficient image accuracy. When shooting delicate objects or scenes requiring precise focusing, it is difficult to achieve ideal sharpness and detail. Furthermore, for scenes requiring rapid focus adjustments to capture fleeting moments, the lack of fine-tuning significantly reduces the camera's responsiveness and adaptability, impacting shooting results and user experience. This limits the camera's application range and image quality in professional photography. To address these issues, this invention employs a fine-tuning structure, with motor 303 driving the third tooth. When gear 302 rotates, since the diameter of the third gear 302 is smaller than that of the first gear 3 and the second gear 301, according to the gear transmission principle, when the small gear 3 drives the large gear 1 and the second gear, the speed of the large gear will decrease. Therefore, the rotation speed of the first gear 3 and the second gear 301 will be slower than that of the third gear 302. Since the first gear 3 and the second gear 301 are fixed on the surfaces of the first threaded rod 105 and the second threaded rod 106 respectively, the rotation of the threaded rod will drive the lens module 108 to move. Due to the difference in gear speed, the moving speed of the lens module 108 will be relatively slow, thereby achieving slow and precise focus adjustment.

[0032] The lens module 108 includes a front bracket 4, with multiple clamping blocks 401 fixed to one side of the front bracket 4, a lens body 402 located on one side of the front bracket 4, and a rear bracket 403 fixed to one side of the clamping blocks 401. The design of the lens module 108, through the structure of the front bracket 4, clamping blocks 401, and rear bracket 403, enables a stable fixation of the lens body 402. The clamping blocks 401 not only provide reliable support but also ensure that the lens body 402 maintains a precise position and angle during adjustment, preventing displacement due to vibration or external force. This structure enhances the overall stability and reliability of the lens module, allowing the lens to maintain good optical performance even after prolonged use or in complex environments. A first magnet 5 is fixed to one side of the protective cover 201, and a second magnet 501 is fixed to one side of the camera body 1, enabling magnetic adsorption between the protective cover and the camera body. When using the camera, the protective cover can be easily opened and adsorbed onto one side of the camera body, preventing shaking or loosening from affecting shooting. A dust plug is provided on the inner wall of the charging port 109. 6. A dust plug seat 601 is fixed to the bottom of the dust plug body 6. The dust plug seat 601 is located at the bottom of the camera body 1. By setting the dust plug body 6 on the inner wall of the charging port 109 and fixing the dust plug seat 601 to the bottom of the dust plug body, dust, dirt, and moisture can be effectively prevented from entering the charging port. The dust plug body 6 can fit tightly against the inner wall of the charging port 109 to form a good sealing effect and prevent the intrusion of external impurities. The dust plug seat 601 further enhances the fixing stability of the dust plug body 6 and ensures its stability during camera use. During operation, the protective cover will not loosen or fall off due to vibration or external force. The surface of the protective cover 201 is provided with a gripping groove 7, and the inner wall of the gripping groove 7 is provided with an inclined groove, which can significantly improve the convenience and comfort of the user in operating the protective cover. The gripping groove 7 provides the user with a clear gripping position, allowing the user to easily grasp the protective cover for opening and closing operations. The design of the inclined groove further increases the friction of the gripping groove, preventing the hand from slipping. Especially when it is wet or the fingers are stained, the user can still firmly hold the protective cover and ensure smooth operation.

[0033] The working principle of this utility model is as follows: The fine-tuning drive device drives the first threaded rod 105 and the second threaded rod 106 to rotate. Since the lens module 108 is threadedly connected to these two threaded rods, and the lens module 108 is restricted by the two sliding rods 107 to move only along the direction of the sliding rods, when the threaded rods rotate, the lens module 108 will move linearly along the direction of the sliding rods 107. This movement changes the position of the lens module 108 within the camera body 1, thereby achieving focal length adjustment. By precisely controlling the fine-tuning drive device, the position of the lens module 108 can be finely adjusted, thereby completing the accurate calibration of the focal length and ensuring that the camera can obtain clear images at different shooting distances. The protective cover 201 is rotatably connected to the camera body 1 through the support block 2 and can be opened and closed freely. When the protective cover 201 is closed, the latch seat 202 on it cooperates with the latch shaft 205 to achieve fixation. The sliding blocks 206 at both ends of the latch shaft 205 slide in the sliding groove 204, and the spring 207 provides elastic force to ensure that the latch seat 202... The protective cover 201 is securely fixed to the lens by the snap-fit ​​shaft 205, providing protection for the lens. When the protective cover 201 needs to be opened, the spring force of the spring 207 is overcome, and the sliding block 206 slides in the sliding groove 204. The snap-fit ​​seat 202 separates from the snap-fit ​​shaft 205, and the protective cover 201 can be opened for easy use of the lens for shooting. The motor 303 drives the third gear 302 to rotate. Since the diameter of the third gear 302 is smaller than that of the first gear 3 and the second gear 301, according to the gear transmission principle, when the small gear third gear drives the large gear first gear and the second gear, the speed of the large gear will decrease. Therefore, the rotation speed of the first gear 3 and the second gear 301 will be slower than that of the third gear 302. Since the first gear 3 and the second gear 301 are fixed to the surfaces of the first threaded rod 105 and the second threaded rod 106 respectively, the rotation of the threaded rod will drive the lens module 108 to move. Due to the difference in gear speed, the moving speed of the lens module 108 will be relatively slow, thereby achieving slow and precise focus adjustment.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A calibration structure for adjusting lens focal length, comprising a camera body (1), wherein a charging port (109) is provided at the bottom of the camera body (1), characterized in that: The camera body (1) has a first component slot (101) inside. A first fixing plate (102) and a second fixing plate (103) are fixed to the inner wall of the first component slot (101). A third fixing plate (104) is fixed to the inner wall of the first component slot (101). A first threaded rod (105) is rotatably connected to one side of the first fixing plate (102). The other end of the first threaded rod (105) is rotatably connected to one side of the third fixing plate (104). A second threaded rod (106) is rotatably connected to one side of the second fixing plate (103). 6) The other end is rotatably connected to one side of the third fixed plate (104). The first fixed plate (102) and the second fixed plate (103) are each fixed with a sliding rod (107). The other end of the two sliding rods (107) is fixed to one side of the third fixed plate (104). The first threaded rod (105) and the second threaded rod (106) are rotatably connected with a lens module (108). The lens module (108) slides on the surface of the two sliding rods (107). The first threaded rod (105) and the second threaded rod (106) are driven to rotate by a fine-tuning drive device.

2. The calibration structure for lens focal length adjustment according to claim 1, characterized in that: Two support blocks (2) are fixed on one side of the camera body (1). A protective cover plate (201) is rotatably connected to one side of the two support blocks (2). A buckle seat (202) is fixed on one side of the protective cover plate (201). A second component groove (203) is opened on one side of the camera body (1). Multiple sliding grooves (204) are opened on the inner wall of the second component groove (203). Two buckle shafts (205) are provided on the inner wall of the second component groove (203). Sliding blocks (206) are fixed at both ends of the two buckle shafts (205). The sliding blocks (206) slide on the inner wall of the sliding groove (204). Springs (207) are fixed on both sides of the sliding blocks (206). The other end of the springs (207) is fixed to the inner wall of the sliding groove (204).

3. The calibration structure for lens focal length adjustment according to claim 1, characterized in that: The fine-tuning drive device includes a first gear (3), a second gear (301), a third gear (302), and a motor (303). The first gear (3) is fixed to the surface of the first threaded rod (105), the second gear (301) is fixed to the surface of the second threaded rod (106), and the third gear (302) meshes with the surfaces of the first gear (3) and the second gear (301). The third gear (302) is driven to rotate by the motor (303), which is fixed to one side of the third fixed plate (104). The diameters of the first gear (3) and the second gear (301) are equal, and the diameter of the first gear (3) is greater than that of the third gear (302).

4. The calibration structure for lens focal length adjustment according to claim 1, characterized in that: The lens module (108) includes a front bracket (4), a plurality of clamping blocks (401) are fixed on one side of the front bracket (4), a lens body (402) is provided on one side of the front bracket (4), and a rear bracket (403) is fixed on one side of the plurality of clamping blocks (401).

5. A calibration structure for adjusting lens focal length according to claim 2, characterized in that: A first magnet (5) is fixed on one side of the protective cover (201), and a second magnet (501) is fixed on one side of the camera body (1).

6. The calibration structure for lens focal length adjustment according to claim 1, characterized in that: The inner wall of the charging port (109) is provided with a dustproof plug (6), and a dustproof plug seat (601) is fixed at the bottom of the dustproof plug (6). The dustproof plug seat (601) is located at the bottom of the camera body (1).

7. A calibration structure for adjusting lens focal length according to claim 2, characterized in that: The protective cover plate (201) has a gripping groove (7) on its surface, and the inner wall of the gripping groove (7) has an inclined groove.

Images