Lens focusing device

Abstract

The utility model relates to the technical field of camera focusing, and provides a lens focusing device, which comprises a focusing lens and a focusing assembly, the focusing assembly is provided with a light through hole penetrating through two sides of the focusing assembly, and the light through hole is coaxial with the rotation axis of the focusing assembly. A first connecting part and a second connecting part are arranged on the two sides of the focusing assembly respectively, the focusing lens is detachably arranged on the first connecting part, and the second connecting part is used for being connected with a to-be-adjusted lens. The lens focusing device provided by the utility model is used for solving the defect of alternately executing focusing and imaging verification in the prior art, and the focusing lens is integrated in the focusing assembly, so that an external teleconverter does not need to be repeatedly moved in the focusing operation, and an operator can synchronously complete focal length adjustment and imaging verification only by adjusting the focusing assembly. And positioning error accumulation caused by multiple times of displacement of the teleconverter is avoided.

Description

Technical Field

[0001] This utility model relates to the field of camera focusing technology, and in particular to a lens focusing device. Background Technology

[0002] As a core component for image acquisition in electronic devices, the focusing accuracy of the camera module directly affects the image quality. Current focusing processes typically employ manual operation. Specifically, after fixing the camera module under test onto the test fixture, the operator vertically covers the lens of the module with a teleconverter and evaluates the image quality by magnifying the image.

[0003] When the lens focal length needs to be adjusted, the operator must first move the teleconverter to obtain operating space due to the small distance between the bottom of the teleconverter and the module mirror. Then, the operator must manually rotate the lens to fine-tune the focal length and then reposition the teleconverter to observe the adjustment effect. This process requires repeatedly moving the teleconverter and alternating between focusing and imaging verification. This frequent teleconverter displacement not only prolongs the focusing time of a single module, but also causes the positioning accuracy to gradually decrease due to the repeated movement of the teleconverter, thus affecting the accuracy of imaging evaluation. Utility Model Content

[0004] This invention provides a lens focusing device to solve the defects of the prior art in which focusing and imaging verification are performed alternately. By integrating the focusing lens into the focusing component, the focusing operation does not require repeated moving of the external teleconverter. The operator only needs to adjust the focusing component to simultaneously complete the focal length adjustment and imaging verification, thus avoiding the accumulation of positioning errors caused by multiple moving of the teleconverter.

[0005] The lens focusing device provided by this utility model includes:

[0006] Focusing lens;

[0007] A focusing assembly has light-transmitting holes through both sides of the focusing assembly, and the light-transmitting holes are coaxial with the rotation axis of the focusing assembly. A first connecting part and a second connecting part are respectively provided on both sides of the focusing assembly. The focusing lens is detachably disposed on the first connecting part, and the second connecting part is used to connect the lens to be adjusted.

[0008] According to the lens focusing device provided by this utility model, the focusing component includes:

[0009] A focusing cover, wherein the first connecting part is disposed on one side of the focusing cover;

[0010] The lower focusing cover is detachably connected to the other side of the upper focusing cover. The light-transmitting hole is provided on the upper focusing cover and the lower focusing cover. The second connecting part is provided on the lower focusing cover and / or the upper focusing cover.

[0011] According to the lens focusing device provided by this utility model, the focusing component further includes a lever and an elastic element;

[0012] The second connecting part includes a sliding groove with an opening at one end facing the light-transmitting hole. The lever is slidably disposed in the sliding groove. One end of the elastic member abuts against the lever, and the other end of the elastic member abuts against the shoulder of the sliding groove. The elastic member is used to limit the position of the lever relative to the sliding groove. The lever is used to engage with the lens to be adjusted.

[0013] According to the lens focusing device provided by this utility model, at least one of the focusing cover and the focusing cover is provided with a limiting groove, and the extending direction of the limiting groove is the same as the extending direction of the sliding groove.

[0014] The lever includes:

[0015] The first section is slidably disposed in the slide groove, and the first section is used to engage with the lens to be adjusted;

[0016] The second segment is arranged perpendicular to the first segment, with one end of the second segment away from the first segment located in the limiting groove, and the second segment is at least partially located outside the limiting groove;

[0017] One end of the elastic element abuts against the shoulder of the groove, and the other end of the elastic element abuts against the first segment and / or the second segment.

[0018] According to the lens focusing device provided by this utility model, the lever further includes a third section, which is located on the side of the second section away from the first section and is slidably disposed in the slide groove;

[0019] The elastic element includes a spring, which is sleeved on the third section, with one end of the spring abutting against the shoulder of the groove and the other end of the spring abutting against the second section.

[0020] According to the lens focusing device provided by this utility model, at least two sliding grooves are provided. When there are two or more sliding grooves, the sliding grooves are evenly distributed along the circumference of the focusing component.

[0021] The number and position of the levers correspond one-to-one with the number and position of the slides; the number and position of the elastic elements correspond one-to-one with the number and position of the slides.

[0022] According to the lens focusing device provided by this utility model, a flexible anti-slip component is provided at one end of the lever facing the light-transmitting hole, and the flexible anti-slip component is used to engage with the lens to be adjusted.

[0023] According to the lens focusing device provided by this utility model, the focusing cover includes:

[0024] The upper cover body is detachably connected to the lower focusing cover;

[0025] An extender protrusion is located on the side of the upper cover body away from the focusing lower cover, and the first connecting portion is located on the side of the extender protrusion away from the upper cover body; the light-transmitting hole is located on the upper cover body and the extender protrusion.

[0026] According to the lens focusing device provided by this utility model, at least one extension protrusion is provided, and the extension protrusion is detachably connected to the upper cover body.

[0027] When two or more of the aforementioned distance-extending protrusions are provided, all the distance-extending protrusions are sequentially stacked on the side of the upper cover body away from the focusing lower cover, and the first connecting portion is provided on the side of the outermost distance-extending protrusion away from the upper cover body.

[0028] According to the lens focusing device provided by this utility model, the first connecting part is fixedly connected to the focusing lens by adhesive dispensing.

[0029] The lens focusing device provided by this utility model integrates the focusing lens into the focusing assembly, eliminating the need for repeatedly moving the external teleconverter during focusing. Furthermore, the focusing assembly's connection structure is directly fixed to the lens to be adjusted, allowing the operator to simultaneously complete focus adjustment and image verification simply by adjusting the focusing assembly, thus avoiding the accumulation of positioning errors caused by repeated moving of the teleconverter.

[0030] Compared to the manual alternating lens shifting and focusing process in existing technologies, the lens focusing device provided by this invention reduces the number of operation steps and shortens the single focusing time. Furthermore, because the light-transmitting aperture and the rotation axis of the focusing component are coaxial, the accuracy of focus adjustment and the reliability of image evaluation are improved. In addition, the detachable design of the focusing lens allows for quick replacement of adaptable lenses according to different lens models, further expanding the device's versatility. Secondly, by assembling different focusing lenses, the actual imaging state of the lens under test in real-world use can be simulated, meeting the different focusing requirements of the focusing lenses. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1This is an exploded structural diagram of the lens focusing device provided in this embodiment of the utility model.

[0033] Figure 2 This is a cross-sectional structural schematic diagram of the lens focusing device provided in this embodiment of the utility model.

[0034] Figure 3 This is a schematic diagram showing the state of the lens focusing device and the lens to be adjusted during the disassembly and separation process provided in this embodiment of the utility model.

[0035] Figure 4 This is a schematic diagram showing the state of the lens focusing device and the lens to be adjusted after assembly according to an embodiment of the present invention.

[0036] Figure label:

[0037] 100: Focusing lens; 200: Lens to be adjusted; 300: Focusing assembly; 310: Light passage; 320: First connecting part; 330: Second connecting part; 340: Sliding groove; 350: Focusing top cover; 351: Top cover body; 352: Extending boss; 360: Focusing bottom cover; 370: Lever; 371: First section; 372: Second section; 373: Third section; 380: Elastic element; 390: Limiting groove. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0040] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Figure 1 This is an exploded structural diagram of the lens focusing device provided in this embodiment of the utility model; Figure 2 This is a cross-sectional structural schematic diagram of the lens focusing device provided in this embodiment of the utility model.

[0043] This utility model provides a lens focusing device that enables simultaneous observation of the imaging effect during focusing, thereby improving focusing efficiency and accuracy. The following describes the device in conjunction with... Figure 1 and Figure 2 A detailed description of the lens focusing mechanism is provided.

[0044] The lens focusing device provided in this embodiment includes a focusing lens 100 and a focusing assembly 300. The focusing assembly 300 has a ring structure with a light-transmitting hole 310 at its center, passing through both sides. The axis of the light-transmitting hole 310 coincides with the rotation axis of the focusing assembly 300. A first connecting part 320 and a second connecting part 330 are respectively provided on both sides of the focusing assembly 300. The focusing lens 100 is detachably fixed to the first connecting part 320, for example, by threaded connection, adhesive bonding, snap-fit ​​structure or magnetic installation.

[0045] The second connecting part 330 is a mounting structure for connecting to the lens 200 to be adjusted. For example, the second connecting part 330 is provided with a thread or elastic claw that matches the external thread of the lens 200 to be adjusted, for fixed connection with the lens body. The main body of the focusing assembly 300 can be a cylindrical or stepped shaft structure. It should be noted that the diameter of the light-transmitting hole 310 needs to match the light-transmitting area of ​​the focusing lens 100 to ensure that the light path is not blocked when passing through. It should also be noted that the focusing lens 100 can be replaced with a teleconverter, filter or other optical element according to different test requirements to simulate actual imaging conditions.

[0046] In one optional example, the first connecting part 320 is an internally threaded interface, and the edge of the focusing lens 100 has a corresponding external thread. The focusing lens 100 can be fixed to one side of the focusing assembly 300 by screwing. The second connecting part 330 is designed with an external thread structure, which can be directly screwed into the threaded interface of the lens to be adjusted 200, thereby coaxially fixing the focusing assembly 300 and the lens to be adjusted 200. In another optional example, the first connecting part 320 adopts a snap-fit ​​structure, and the edge of the focusing lens 100 has a protrusion that matches the groove on the focusing assembly 300, allowing for quick installation and removal by pressing.

[0047] Figure 3 This is a schematic diagram showing the state of the lens focusing device and the lens to be adjusted during the disassembly and separation process provided in this embodiment of the utility model. Figure 4 This is a schematic diagram showing the state of the lens focusing device and the lens to be adjusted after assembly according to an embodiment of the present invention.

[0048] See Figure 3 and Figure 4 During operation, first install the focusing lens 100 onto the first connecting part 320 of the focusing assembly 300, then connect the second connecting part 330 of the focusing assembly 300 to the lens 200 to be adjusted, forming a coaxial optical path. During focusing, the operator rotates the focusing assembly 300 as a whole or in part to change the angle of the lens 200 to be adjusted, thereby adjusting the imaging focal length. For disassembly, simply separate the lens 200 in reverse order.

[0049] It is understood that in the lens focusing device provided in this embodiment of the present invention, by integrating the focusing lens 100 into the focusing assembly 300, the focusing operation does not require repeated movement of the external teleconverter. In addition, the connection structure of the focusing assembly 300 is directly fixed to the lens 200 to be adjusted, and the operator only needs to adjust the focusing assembly 300 to simultaneously complete the focal length adjustment and image verification, avoiding the accumulation of positioning errors caused by repeated movement of the teleconverter.

[0050] Compared to the manual alternating lens shifting and focusing process in existing technologies, the lens focusing device provided in this embodiment reduces the number of operation steps and shortens the single focusing time. Furthermore, because the light-transmitting aperture 310 and the focusing assembly 300 are coaxial, the accuracy of focal length adjustment and the reliability of image evaluation are improved. In addition, the detachable design of the focusing lens 100 allows for quick replacement of adapter lenses according to different lens models, further expanding the device's versatility. Secondly, by assembling different focusing lenses 100, the actual imaging state of the lens under test in real-world use can be simulated, meeting the different focusing requirements of the focusing lens 100.

[0051] Continue reading Figure 1 and Figure 2 In an optional embodiment of this utility model, the focusing assembly 300 includes a focusing upper cover 350 and a focusing lower cover 360. A first connecting portion 320 is provided on one side of the focusing upper cover 350, which is used to fix the focusing lens 100. The focusing lower cover 360 is detachably connected to the other side of the focusing upper cover 350, and together with the focusing upper cover 350, forms the optical path channel of the light-transmitting hole 310. For example, the focusing upper cover 350 and the focusing lower cover 360 can be detachably connected by threads, snaps, or magnetic structures, and the light-transmitting hole 310 forms a continuous through channel after the two are joined.

[0052] The second connecting part 330 can be disposed on the lower focusing cover 360, the upper focusing cover 350, or both. The second connecting part 330 is used to connect with the lens 200 to be adjusted. In an optional specific example, the first connecting part 320 of the upper focusing cover 350 is an external thread interface for mounting a focusing lens 100 with internal threads; the second connecting part 330 of the lower focusing cover 360 is an internal thread interface that can be directly screwed into the external thread end of the lens 200 to be adjusted.

[0053] In another alternative example, the focusing upper cover 350 and the focusing lower cover 360 are connected by a snap-fit ​​mechanism. The side wall of the focusing upper cover 350 is provided with elastic claws, and the corresponding position of the focusing lower cover 360 is provided with an annular groove. The claws and the groove cooperate to achieve quick locking. In this case, the second connecting part 330 can be designed as a quick-release interface at the bottom of the focusing lower cover 360, such as a three-claw chuck structure, to adapt to the installation requirements of different lens models 200 to be adjusted.

[0054] During assembly, the focusing lens 100 is first installed onto the first connecting part 320 of the focusing upper cover 350, and then the focusing lower cover 360 is mated and fixed to the focusing upper cover 350 to form a complete light-transmitting hole 310. After the focusing lower cover 360 is connected to the lens 200 to be adjusted through the second connecting part 330, the operator can adjust the focal length of the lens 200 to be adjusted by adjusting either the focusing upper cover 350 or the focusing lower cover 360.

[0055] It is understood that in the lens focusing device provided by this embodiment of the present invention, by dividing the focusing assembly 300 into a detachably connected upper focusing cover 350 and a lower focusing cover 360, the flexible combination of the upper focusing cover 350 and the lower focusing cover 360 allows for independent adjustment of the position of the focusing lens 100 or replacement of the upper focusing cover 350 adapted to different focusing lenses 100, thereby improving the modularity of the device. Furthermore, the design of the second connecting part 330 located in the lower focusing cover 360 and / or the upper focusing cover 350 can adapt to diverse layouts of the lens interface, thus expanding the applicability of the focusing device.

[0056] Continue reading Figures 1 to 4 In an optional embodiment of this utility model, the focusing assembly 300 includes a lever 370 and an elastic member 380. Correspondingly, the second connecting part 330 includes a groove 340. The groove 340 has an opening at one end facing the light-transmitting hole 310. The lever 370 is slidably disposed in the groove 340. One end of the elastic member 380 abuts against the lever 370, and the other end abuts against the shoulder of the groove 340. The elastic member 380 is used to limit the sliding range of the lever 370 in the groove 340. The lever 370 is used to engage with the lens 200 to be adjusted.

[0057] In an optional specific example, the slide 340 is a through groove radially disposed on the surface of the focusing lower cover 360 and intersecting and communicating with the light-transmitting hole 310. The end of the lever 370 is provided with a protruding structure, and the elastic element 380 is a compression spring. The spring preload keeps the protrusion of the lever 370 in an outward pop-out state, thereby engaging with the groove on the side wall of the lens to be adjusted 200.

[0058] In another alternative example, the slide 340 is a straight groove with its opening facing the light-transmitting hole 310 of the focusing assembly 300, the end of the lever 370 is designed as a wedge-shaped block, and the elastic element 380 is a rubber element. The elasticity of the rubber element causes the wedge-shaped surface of the lever 370 to form a limiting structure with the annular flange of the lens 200 to be adjusted.

[0059] It is understood that in the lens focusing device provided in this embodiment of the present invention, the quick snap-fit ​​and stable fixation of the lens 200 to be adjusted is achieved by adding a cooperative structure of lever 370 and elastic element 380. The synergistic effect of slide groove 340 and elastic element 380 accurately limits the sliding range of lever 370, thereby ensuring the reliability and repeatability of the snap-fit ​​action.

[0060] Compared to the manual, repeated movement of teleconverters, this structure simplifies the installation process of the lens 200 to be adjusted, avoiding focusing deviations caused by insecure manual fixing. Simultaneously, the preload of the elastic element 380 adapts to different sizes of the lens 200 to be adjusted, ensuring strong engagement while reducing mechanical wear on the lens 200's surface. Furthermore, the sliding design of the lever 370 allows for single-handed lens installation and removal, further improving focusing efficiency and making it suitable for testing scenarios requiring frequent lens changes.

[0061] Continue reading Figure 1 and Figure 2 In an optional embodiment of the present invention, a limiting groove 390 is provided on the focusing upper cover 350 and / or the focusing lower cover 360. In other words, this embodiment also includes a limiting groove 390, which is provided on at least one of the focusing upper cover 350 and the focusing lower cover 360; and the extending direction of the limiting groove 390 is consistent with the extending direction of the slide groove 340.

[0062] The lever 370 includes a first segment 371 and a second segment 372. The first segment 371 is slidably disposed within the slide groove 340 for engaging with the lens 200 to be adjusted. The second segment 372 is perpendicularly connected to the first segment 371, with its end away from the first segment 371 passing through the limiting groove 390 and partially exposed outside the limiting groove 390. One end of the elastic member 380 abuts against the shoulder of the slide groove 340, and the other end can abut against either the first segment 371 or the second segment 372.

[0063] In an optional example, the limiting through groove 390 is located on the focusing upper cover 350, the sliding groove 340 is a straight groove extending radially along the focusing lower cover 360, the limiting through groove 390 and the sliding groove 340 are perpendicularly connected in an inverted "T" shape, the first section 371 and the second section 372 of the lever 370 form an L-shaped operating lever, the operating lever is exposed after passing through the limiting through groove 390, the elastic element 380 is a compression spring, one end of which abuts against the bottom of the sliding groove 340, and the other end abuts against the end face of the first section 371.

[0064] In another alternative example, the limiting groove 390 is located between the focusing lower cover 360 and the focusing upper cover 350, the slide groove 340 is a straight groove extending radially along the focusing lower cover 360, the limiting groove 390 and the slide groove 340 are connected perpendicularly in a "+" shape, the first segment 371 and the second segment 372 of the lever 370 form a "T" shaped operating lever, the operating lever passes through the upper and lower limiting grooves 390 and is exposed, the elastic element 380 is a tension spring, one end of which is connected to the bottom of the slide groove 340 and the other end is connected to the end face of the first segment 371. In this case, the elastic element 380 can be directly sleeved on the first segment 371, or it can be set on the side of the second segment 372 facing the light-transmitting hole 310.

[0065] During operation, pressing or moving the exposed second segment 372 causes the first segment 371 to slide along the slide groove 340, simultaneously compressing or stretching the elastic element 380. When the lens 200 to be adjusted is inserted into the second connecting part 330 through the light-transmitting hole 310, the second segment 372 is released, and the rebound force of the elastic element 380 pushes or pulls the first segment 371 back to its original position, locking it tightly with the lens's locking structure. The limiting through groove 390 constrains the movement trajectory of the second segment 372, ensuring the stability of the sliding direction of the first segment 371 within the slide groove 340.

[0066] It is understood that the lens focusing device provided in this embodiment of the present invention achieves accurate guidance and labor-saving control of the locking operation by adding a limiting groove 390 and a lever 370 structure. The limiting groove 390 physically constrains the movement path of the second segment 372, preventing the lever 370 from shifting or jamming during sliding, thus ensuring the accuracy of the locking action. Secondly, the exposed portion of the second segment 372 serves as an operating handle, allowing the operator to install and remove the lens without directly contacting the internal structure of the slide 340, reducing interference with the internal optical path of the focusing assembly 300.

[0067] Compared to the frequent manual movement of teleconverters, this design improves lens stability and operational efficiency through mechanical limiting and elastic reset structures. Furthermore, the flexible selection of the 380° contact position of the elastic element can be adapted to the clamping force requirements of different lens mounts, ensuring locking strength while reducing operational fatigue, making it suitable for continuous focusing scenarios involving large batches of lenses.

[0068] Continue reading Figure 1 and Figure 2 In an optional embodiment of this utility model, the lever 370 further includes a third segment 373, which is located on the side of the second segment 372 away from the first segment 371 and is slidably disposed along the slide groove 340. The elastic element 380 is a spring, which is sleeved on the outside of the third segment 373, with one end abutting against the shoulder of the slide groove 340 and the other end abutting against the side wall of the second segment 372.

[0069] In one optional example, the third segment 373 is a cylindrical guide rod, the shoulder of the slide groove 340 is an annular boss, and a spring is sleeved on the guide rod, with one end contacting the boss and the other end abutting against the annular flange of the second segment 372. The spring is compressed by the sliding of the cylindrical guide rod. In another optional example, the third segment 373 is a square guide rod, the shoulder of the slide groove 340 is a limiting stop, and a spring is sleeved on the outside of the square rod, with one end abutting against the stop and the other end abutting against the planar end face of the second segment 372.

[0070] During operation, pressing or moving the exposed part of the second section 372 causes the third section 373 to slide along the slide groove 340, compressing or stretching the spring. When the lens to be adjusted 200 is inserted, releasing the second section 372 causes the spring's restoring force to push the third section 373 back to its original position, locking the locking part of the first section 371 with the lens.

[0071] It is understood that the lens focusing device provided in this embodiment of the present invention improves the force distribution of the elastic element 380 and the guiding accuracy of the lever 370 by adding a third segment 373 and sleeved the spring on its outside. The guide rod structure of the third segment 373 physically constrains the extension and contraction path of the spring, preventing lateral bending of the spring during compression or extension, thereby improving the efficiency and service life of the elastic element 380.

[0072] Compared to the repeated manual placement and repositioning of teleconverters, this design, through the integrated structure of the spring and guide rod, ensures that the force direction of the locking action aligns with the reset trajectory, reducing the risk of locking failure due to force deviation during operation. Furthermore, the spring sleeve on the third segment 373 simplifies the assembly process, facilitating quick disassembly and replacement of the elastic element 380. This adapts to the locking requirements of different lenses 200, further improving the maintainability and versatility of the focusing device.

[0073] Continue reading Figure 1 and Figure 2 In an optional embodiment of this utility model, at least two slide grooves 340 are provided. When there are two or more slide grooves 340, these slide grooves 340 are evenly distributed along the circumference of the focusing assembly 300. The number and position of the levers 370 and elastic elements 380 correspond one-to-one with the slide grooves 340. For example, the slide grooves 340 can be designed to be arranged at equal angles along the circumference of the lower focusing cover 360 or the upper focusing cover 350 to form a symmetrical layout.

[0074] In one optional example, the upper surface of the focusing lower cover 360 is provided with two sliding grooves 340, symmetrically located on both sides of the light-transmitting hole 310. Each sliding groove 340 contains a lever 370 and a corresponding elastic element 380. In another optional example, the focusing lower cover 360 is provided with three sliding grooves 340 circumferentially, evenly distributed at 120-degree intervals. Each sliding groove 340 contains a lever 370 and a corresponding compression spring. In yet another optional example, the focusing upper cover 350 is provided with four sliding grooves 340, distributed at 90-degree intervals circumferentially. Each sliding groove 340 contains a lever 370 and a corresponding compression spring. The extension direction of the sliding grooves 340 can be designed as a straight line or an arc, with their openings facing the axis of the light-transmitting hole 310 or inclined. Specifically, it can be adapted according to the actual situation.

[0075] See Figure 3 When installing the lens, the operator simultaneously moves multiple levers 370 outwards. The first segment 371 of each lever 370 slides synchronously along the slide groove 340, compressing the corresponding elastic element 380 to release the locking space. After the lens 200 to be adjusted is inserted into place, the levers 370 are released. The rebound force of each elastic element 380 drives the levers 370 to reset, and multiple locking points apply force evenly in the circumferential direction, achieving coaxial fixation of the lens 200 to be adjusted. For example, in the three-slide groove 340 embodiment, the synchronous action of the three levers 370 forms a three-point clamping, ensuring uniform force on the lens; in the four-slide groove 340 embodiment, the four sets of locking structures balance the radial pressure of the lens through the synergistic action of the elastic elements 380.

[0076] It is understood that in the lens focusing device provided in this embodiment of the present invention, the circumferentially uniform distribution of the slide groove 340 and the corresponding arrangement of the lever 370 and elastic element 380 achieve a multi-directional balanced distribution of the lens clamping force. Specifically, multiple clamping points act synchronously along the circumference, which can eliminate the optical axis offset that may be caused by unilateral force application and improve the coaxial accuracy of the lens 200 to be adjusted. In addition, during the focusing process, the circumferentially distributed clamping structure can adapt to the slight deformation of the lens, avoiding imaging deviation caused by local stress concentration.

[0077] Compared to the manual and repeated adjustments of the teleconverter, this design effectively reduces focusing errors caused by uneven manual operation through the symmetry of the mechanical structure and the coordinated reset of the elastic element 380. Furthermore, the one-to-one correspondence between the elastic element 380 and the slide 340 ensures consistent force application at each locking point, preventing the lens 200 from loosening or wearing due to localized jamming, thereby improving the reliability and lifespan of the focusing device.

[0078] In an optional embodiment of this invention, a flexible anti-slip component is added to the end of the lever 370 facing the light-transmitting hole 310. This flexible anti-slip component is used to contact the lens 200 to be adjusted. For example, the flexible anti-slip component can be a rubber pad, a silicone sleeve, or a polyurethane buffer layer, and is fixed to the end of the lever 370 by embedding, bonding, or sleeve. In one optional example, the flexible anti-slip component is a hemispherical rubber head, embedded in the groove at the end of the lever 370, with its protruding part contacting the slot on the side wall of the lens 200 to be adjusted. In another optional example, the flexible anti-slip component is a cylindrical silicone sleeve, sleeved on the cylindrical end of the lever 370, adapting to the curvature of different lens surfaces through the elastic deformation of the silicone. In other optional embodiments of this invention, the surface of the flexible anti-slip component can be designed with an anti-slip texture or granular structure to enhance frictional resistance.

[0079] When the lever 370 engages with the lens 200 under the rebound force of the elastic element 380, the flexible anti-slip element directly contacts the surface of the lens 200. Its elastic material deforms during engagement, buffering mechanical impact and increasing friction on the contact surface to prevent the lens 200 from sliding. For example, in the hemispherical rubber head embodiment, the rubber head deforms under pressure when the lens 200 is inserted, conforming to the edge of the slot on the side wall of the lens 200, utilizing the high coefficient of friction of the rubber to achieve anti-slip; in the silicone sleeve embodiment, the radial elasticity of the silicone allows it to adapt to lenses 200 of different diameters, avoiding surface scratches caused by rigid contact.

[0080] It is understood that the lens focusing device provided in this embodiment of the present invention reduces the risk of mechanical damage to the lens 200 to be adjusted during the locking process by adding a flexible anti-slip component, while improving the stability of the locking. Specifically, the elastic deformation characteristics of the flexible material can adapt to different dimensional tolerances and surface morphologies of the lens 200 to be adjusted, avoiding scratches on the lens 200 or locking failure caused by rigid contact. In addition, during the focusing process, the deformation of the flexible anti-slip component can compensate for the small gap between the lens 200 to be adjusted and the lever 370, ensuring the stability of the locking.

[0081] Compared to the potential for lens wear due to improper handling during frequent manual repositioning of teleconverters, this design protects the integrity of the lens 200 through flexible contact, making it suitable for focusing scenarios involving high-precision or high-value lenses. Furthermore, the friction-enhancing properties of the flexible anti-slip component effectively prevent minor displacement of the lens 200 due to vibration or external forces during focusing, ensuring the accuracy of post-focusing image verification. The diverse selection of flexible materials also allows for adaptation to lenses 200 made of different materials, further expanding the device's compatibility.

[0082] Continue reading Figure 1 and Figure 2 In an optional embodiment of the present invention, the focusing upper cover 350 includes an upper cover body 351 and a distance-extending protrusion 352. The upper cover body 351 is detachably connected to the focusing lower cover 360. The distance-extending protrusion 352 is disposed on the side of the upper cover body 351 away from the focusing lower cover 360. The first connecting part 320 is located at the end of the distance-extending protrusion 352 away from the upper cover body 351. The light-transmitting hole 310 penetrates the upper cover body 351 and the distance-extending protrusion 352.

[0083] For example, the upper cover body 351 and the teleconverter boss 352 can be designed as an integral structure or as separate components. In one optional example, the teleconverter boss 352 is an integrally formed cylindrical protrusion with the upper cover body 351, with an outer diameter smaller than that of the upper cover body 351. The first connecting portion 320 is the surface of the teleconverter boss 352 away from the upper cover body 351, used for mounting the focusing lens 100. The light-transmitting hole 310 includes the main hole of the upper cover body 351 and the extension hole of the teleconverter boss 352, both coaxial and having the same diameter. In another optional example, the teleconverter boss 352 is detachably mounted to the upper cover body 351 via a snap-fit ​​structure, accommodating quick replacement of focusing lenses 100 of different specifications.

[0084] During assembly, first fix the extension boss 352 to the upper cover body 351 (this step can be omitted if the two are an integral part), and then install the focusing lens 100 to the first connecting part 320; after the focusing lower cover 360 is connected to the upper cover body 351, the light-passing hole 310 forms a continuous light path channel.

[0085] It is understood that the lens focusing device provided in this embodiment of the present invention, through the structural design of adding a teleconverter 352, achieves the extension of the mounting position of the focusing lens 100 and the flexible adjustment of the optical path length. Specifically, the extension design of the teleconverter 352 increases the optical path distance between the focusing lens 100 and the lens 200 to be adjusted, which can adapt to the focusing requirements of different focal lengths.

[0086] Compared to the manual and repeated movement of the teleconverter, this design integrates the teleconverting function within the focusing assembly 300, eliminating positioning errors caused by frequent teleconverter movement. Furthermore, the modular design of the teleconverter boss 352 allows for the replacement of boss assemblies of different heights to suit various focusing needs, adapting to diverse focal length adjustment scenarios and reducing the cost of replacing the entire focusing assembly 300.

[0087] In an optional embodiment of this utility model, at least one extension protrusion 352 is provided and is connected to the upper cover body 351 by a detachable structure; when two or more extension protrusions are provided, all extension protrusions are stacked sequentially on the side of the upper cover body away from the focusing lower cover, and the first connecting part is provided on the side of the outermost extension protrusion away from the upper cover body.

[0088] For example, the extending boss 352 can be combined with the upper cover body 351 by means of threaded connection, snap-fit ​​connection or magnetic fixation. In one optional example, the top of the upper cover body 351 is provided with an external thread interface, and the bottom of the extending boss 352 is designed with a corresponding internal thread structure, so that the two can be detachably connected by screwing; in another optional example, the bottom of the extending boss 352 is provided with an elastic snap, which cooperates with the annular groove on the top of the upper cover body 351 to achieve quick installation and removal.

[0089] It should be noted that the number of teleconverter protrusions 352 can be configured according to focusing requirements. For example, a single teleconverter protrusion 352 is adapted to standard focal length adjustment, and multiple superimposed teleconverter protrusions 352 can extend the optical path to achieve a wider range of focal length adjustment. Adjacent teleconverter protrusions 352 can be connected in a similar way to the above, which will not be elaborated here.

[0090] During operation, select the appropriate teleconverter 352 according to the focusing requirements and install it onto the upper cover body 351. For example, in the threaded connection embodiment, after unscrewing the original teleconverter 352, replace it with a teleconverter 352 with a different height. The distance between the focusing lens 100 and the lens 200 to be adjusted can be changed by adjusting the number or height of the teleconverter 352. In the snap-on embodiment, disassembly can be completed by pressing the snaps on both sides of the teleconverter 352, and it can be locked back by resetting the snaps after replacement.

[0091] It is understood that the lens focusing device provided in this embodiment of the present invention achieves modular adjustment of the optical path length through the detachable design of the teleconverter protrusion 352, effectively improving the adaptability of the focusing device. Specifically, teleconverter protrusions 352 of different heights can be quickly replaced or stacked to flexibly cope with various focal length adjustment scenarios, avoiding the problem of insufficient focusing range caused by the limitation of a single structure.

[0092] Compared to the manual, repeated movement of the teleconverter, this design replaces the external teleconverter with the replacement of modular components, eliminating imaging evaluation deviations caused by teleconverter positioning errors. Furthermore, the detachable connection structure allows users to customize the teleconverter boss 352 combination according to actual needs, reducing the overall cost of the equipment while decreasing the frequency of component replacements due to changes in focusing parameters.

[0093] In an optional embodiment of this invention, the first connecting part 320 and the focusing lens 100 are fixedly connected by adhesive dispensing. For example, using silicone, in one optional example, the focusing lens 100 can be fixed to the first connecting part 320 by adhesive dispensing. It is understood that this method is easy to install and disassemble, and does not affect the surfaces of the first connecting part 320 and the focusing lens 100. It also does not require any structural modifications to the surface of the first connecting part 320 or the focusing lens 100, effectively reducing the manufacturing cost of the lens focusing device and facilitating mass production and large-scale use.

[0094] It should be noted that the technical solutions in the various embodiments of this utility model can be combined with each other, but the basis for such combination is that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist, that is, it is not within the protection scope of this utility model.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lens focusing device, characterized in that, include: Focusing lens (100); A focusing assembly (300) has a light-transmitting hole (310) that passes through both sides of the focusing assembly (300), and the light-transmitting hole (310) is coaxial with the rotation axis of the focusing assembly (300). A first connecting part (320) and a second connecting part (330) are respectively provided on both sides of the focusing assembly (300). The focusing lens (100) is detachably provided on the first connecting part (320), and the second connecting part (330) is used to connect the lens (200) to be adjusted.

2. The lens focusing device according to claim 1, characterized in that, The focusing assembly (300) includes: A focusing cover (350) has a first connecting part (320) located on one side of the focusing cover (350); The lower focusing cover (360) is detachably connected to the other side of the upper focusing cover (350), the light-transmitting hole (310) is provided on the upper focusing cover (350) and the lower focusing cover (360), and the second connecting part (330) is provided on the lower focusing cover (360) and / or the upper focusing cover (350).

3. The lens focusing device according to claim 2, characterized in that, The focusing assembly (300) also includes a lever (370) and a spring element (380); The second connecting part (330) includes a slide groove (340), which has an opening at one end facing the light-transmitting hole (310). The lever (370) is slidably disposed in the slide groove (340). One end of the elastic member (380) abuts against the lever (370), and the other end of the elastic member (380) abuts against the shoulder of the slide groove (340). The elastic member (380) is used to limit the position of the lever (370) relative to the slide groove (340). The lever (370) is used to engage with the lens to be adjusted (200).

4. The lens focusing device according to claim 3, characterized in that, At least one of the focusing cover (350) and the focusing cover (350) is provided with a limiting groove (390), and the extending direction of the limiting groove (390) is the same as the extending direction of the slide groove (340). The lever (370) includes: The first segment (371) is slidably disposed in the slide groove (340), and the first segment (371) is used to engage with the lens (200) to be adjusted; The second segment (372) is arranged perpendicularly to the first segment (371). One end of the second segment (372) away from the first segment (371) is located in the limiting through groove (390), and the second segment (372) is at least partially located outside the limiting through groove (390). One end of the elastic element (380) abuts against the shoulder of the groove (340), and the other end of the elastic element (380) abuts against the first segment (371) and / or the second segment (372).

5. The lens focusing device according to claim 4, characterized in that, The lever (370) further includes a third section (373), which is located on the side of the second section (372) away from the first section (371) and is slidably disposed in the groove (340). The elastic element (380) includes a spring, which is sleeved on the third segment (373), with one end of the spring abutting against the shoulder of the groove (340) and the other end of the spring abutting against the second segment (372).

6. The lens focusing device according to claim 3, characterized in that, At least two slides (340) are provided. When there are two or more slides (340), the slides (340) are evenly distributed along the circumference of the focusing assembly (300). The number and position of the levers (370) correspond one-to-one with the number and position of the slides (340); the number and position of the elastic elements (380) correspond one-to-one with the number and position of the slides (340).

7. The lens focusing device according to claim 3, characterized in that, The lever (370) is provided with a flexible anti-slip component at one end facing the light-transmitting hole (310), which is used to engage with the lens (200) to be adjusted.

8. The lens focusing device according to claim 2, characterized in that, The focusing cover (350) includes: The upper cover body (351) is detachably connected to the focusing lower cover (360); An extender boss (352) is provided on the side of the upper cover body (351) away from the focusing lower cover (360), and the first connecting part (320) is provided on the side of the extender boss (352) away from the upper cover body (351); the light-transmitting hole (310) is provided on the upper cover body (351) and the extender boss (352).

9. The lens focusing device according to claim 8, characterized in that, At least one of the extension bosses (352) is provided, and the extension bosses (352) are detachably connected to the upper cover body (351). When there are two or more of the aforementioned extension protrusions (352), all the extension protrusions (352) are stacked sequentially on the side of the upper cover body (351) away from the focusing lower cover (360), and the first connecting part (320) is located on the side of the outermost extension protrusion (352) away from the upper cover body (351).

10. The lens focusing device according to any one of claims 1 to 9, characterized in that, The first connecting part (320) is fixedly connected to the focusing lens (100) by dispensing adhesive.

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