A split type manual lens
Patent Information
- Application Number
- CN202522077529.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-09-26
AI Technical Summary
[0004]本实用新型提供了一种分体式手动镜头，旨在解决现有技术中调焦结构加工、装配复杂的问题，以简化加工和装配工序，降低生产、人工及材料成本
[0027]本实施例提供了一种分体式手动镜头，包括调焦镜筒和调焦块，调焦镜筒的表面上设有镜筒孔，调焦块可插接于镜筒孔内，即，调焦镜筒和调焦块为分体式的装配结构，这种分体式装配的调焦结构相比传统的一体式调焦结构，调焦块与调焦镜筒可以分体加工无需一体式精密加工；且由于调焦块可以独立装配，调焦块可以待调焦镜筒装配后再外装，一方面装配时不用过度考虑调焦块螺纹的保护问题，另一方面主镜筒的内壁上也不用专门加工一条避让槽以供调焦块滑入，因此，本实施例的分体式调焦结构可以有效降低加工难度和简化装配过程，降低生产、人工及材料成本。
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Figure CN224873772U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of infrared thermal imager technology, and in particular to a split-type manual lens. Background Technology
[0002] Infrared thermal imaging lenses are mainly classified into motorized lenses, manual lenses, and non-thermalized lenses based on their focusing methods. Among them, manual lenses are widely used due to their reliable structure and controllable cost. Manual lenses have various adjustment methods, mainly including handwheel and manual pin methods. The handwheel focusing method usually relies on guide pin threads, cams, or three-lobed threads to achieve precise and smooth axial movement of the lens group, thereby completing the focal length adjustment.
[0003] In existing three-lobed thread focusing solutions, the focusing structure typically adopts an integrated design. Specifically, the focusing block is machined as a single part with the focusing lens barrel. This integrated structure presents significant manufacturing complexities during use: First, an axial clearance groove needs to be precisely machined on the inner wall of the main lens barrel. Then, when screwing the focusing lens barrel into the main lens barrel, the integrated focusing block must be precisely aligned and slid into the clearance groove to ensure that the focusing lens barrel is successfully installed and rotates normally. This assembly process requires extremely high precision in the machining and assembly of parts, which not only increases the machining difficulty and cost of the main lens barrel but also makes the assembly process cumbersome and inefficient. Furthermore, during repeated adjustments, the threads of the focusing block are easily damaged by impacts, affecting the focusing feel and accuracy. Utility Model Content
[0004] This utility model provides a split-type manual lens, which aims to solve the problem of complex processing and assembly of focusing structures in the prior art, so as to simplify the processing and assembly process and reduce production, labor and material costs.
[0005] This utility model provides a split-type manual lens, including:
[0006] The main lens barrel has a guide groove arranged along its optical axis on its barrel wall.
[0007] A focusing lens barrel is movably disposed inside the main lens barrel along its optical axis, and a lens barrel hole is provided on the outer wall of the focusing lens barrel;
[0008] A focusing block is inserted into the lens barrel hole and slides in the guide groove. The focusing block is provided with an external thread that protrudes from the side wall of the main lens barrel.
[0009] A focusing handwheel is rotatably fitted onto the outside of the main lens barrel. The inner wall of the focusing handwheel is provided with an internal thread, which is screwed into the external thread. The rotation of the focusing handwheel is used to drive the focusing lens barrel to move along the axial direction of the main lens barrel.
[0010] In one embodiment, multiple guide slots, lens barrel holes, and focusing blocks are provided in a one-to-one correspondence;
[0011] The plurality of the guide slots are arranged along the circumferential direction of the main lens barrel;
[0012] The plurality of lens barrel holes and the focusing block are arranged along the circumferential direction of the focusing lens barrel.
[0013] In one embodiment, the plurality of guide slots are evenly arranged along the circumferential direction of the main lens barrel;
[0014] The plurality of lens barrel holes and the focusing blocks are all evenly arranged along the circumference of the focusing lens barrel.
[0015] In one embodiment, the focusing block is either interference-fitted or clearance-fitted with the lens barrel aperture.
[0016] In one embodiment, the split lens further includes an elastic damping element;
[0017] Along the axial direction of the lens barrel hole, the elastic damping element is provided between the focusing block and the lens barrel hole. The elastic damping element is used to buffer the impact force between the focusing handwheel and the focusing lens barrel.
[0018] In one embodiment, the focusing block has a focusing groove located on the surface of the focusing block adjacent to the elastic damping member, and the elastic damping member is disposed within the focusing groove, protruding beyond the surface of the focusing block.
[0019] In one embodiment, the cross-sectional profile of the focusing groove matches the outer cross-sectional profile of the elastic damping member along a plane perpendicular to the axis of the lens barrel hole.
[0020] In one embodiment, the focusing groove is a circular focusing groove;
[0021] The elastic damping element is a circular elastic ring.
[0022] In one embodiment, the split lens further includes a rear lens mount;
[0023] The rear lens mount is connected to the main lens barrel, and the rear lens mount is located at one end of the main lens barrel adjacent to the lens of the focusing lens barrel.
[0024] In one embodiment, at least one limiting step is provided on the outer wall of the main lens barrel;
[0025] The two ends of the focusing handwheel abut against the limiting step and the rear lens mount, respectively, to restrict the axial movement of the focusing handwheel.
[0026] As can be seen from the above technical solutions, this utility model has the following advantages:
[0027] This embodiment provides a split-type manual focus lens, including a focusing barrel and a focusing block. The focusing barrel has a barrel hole on its surface, and the focusing block can be inserted into the barrel hole. That is, the focusing barrel and the focusing block are a split assembly structure. Compared with the traditional one-piece focusing structure, this split assembly focusing structure allows the focusing block and the focusing barrel to be processed separately without the need for one-piece precision machining. Furthermore, since the focusing block can be assembled independently, it can be externally mounted after the focusing barrel is assembled. On the one hand, there is no need to consider the protection of the focusing block's threads during assembly, and on the other hand, there is no need to specially machine a clearance groove on the inner wall of the main barrel for the focusing block to slide into. Therefore, the split focusing structure of this embodiment can effectively reduce the processing difficulty and simplify the assembly process, thereby reducing production, labor, and material costs. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 An exploded view of the overall structure of a split-type lens provided in an embodiment of this utility model;
[0030] Figure 2 This is a cross-sectional schematic diagram of the overall structure of a split lens provided for an embodiment of the present utility model.
[0031] Figure label:
[0032] 1. Main lens barrel; 10. Guide groove; 11. Limiting step; 12. Damping ring; 2. Focusing lens barrel; 20. Lens barrel hole; 21. Focusing lens barrel body; 22. Focusing lens; 23. Pressure ring; 3. Focusing block; 30. External thread; 31. Focusing groove; 4. Focusing handwheel; 40. Internal thread; 5. Elastic damping element; 6. Rear lens mount; 7. Screw. Detailed Implementation
[0033] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.
[0034] In traditional three-lobed thread focusing systems, the focusing structure is typically an integrated design. Specifically, the focusing block is machined as a single part with the focusing lens barrel. This integrated structure presents significant technological and assembly complexities. The technological complexity stems from two main aspects: firstly, because the focusing block is integrally formed with the focusing lens barrel, an axial clearance groove needs to be precisely machined into the inner wall of the main lens barrel when assembling the focusing lens barrel into it; secondly, machining the focusing block as a single piece with the focusing lens barrel requires extremely high precision in machining operations. The assembly complexity arises because the focusing block has threads that mate with the focusing handwheel. Therefore, to avoid damaging these threads, the focusing block must be precisely, strictly, and without contact, moved along the clearance groove to the designated position on the main lens barrel, demanding strict assembly precision. Thus, the technological and assembly complexities in traditional focusing systems are both due to the integrated structure of the focusing block and the focusing lens barrel.
[0035] Therefore, this embodiment provides a split manual lens to improve the focusing structure, thereby solving the problem of complex processing and assembly of the focusing structure in the prior art, simplifying the processing and assembly process, and reducing production, labor and material costs.
[0036] Please see Figure 1 and Figure 2 The present invention provides a split-type lens, comprising:
[0037] The main lens barrel 1 has a guide groove 10 arranged along its optical axis on its barrel wall;
[0038] A focusing lens barrel 2 is movably disposed within the main lens barrel 1 along its optical axis. A lens barrel hole 20 is provided on the outer wall of the focusing lens barrel 2. The focusing lens barrel 2 includes a focusing lens barrel body 21, a focusing lens 22, and a retaining ring 23. The focusing lens 22 is fixed to the focusing lens barrel body by the retaining ring 23. The focusing lens barrel body 21, the focusing lens 22, and the retaining ring 23 are existing technologies and will not be described in detail. The opening depth of the lens barrel hole 20 on the focusing lens barrel body 21 is designed according to the focusing amount of the optical system.
[0039] The focusing block 3 is detachably inserted into the lens barrel hole 20 and slides in the guide groove 10. The focusing block 3 is provided with an external thread 30, which protrudes from the side wall of the main lens barrel 1.
[0040] The focusing handwheel 4 is rotatably sleeved on the outside of the main lens barrel 1. The inner wall of the focusing handwheel 4 is provided with an internal thread 40, which is screwed to the external thread 30. The rotation of the focusing handwheel 4 is used to drive the focusing lens barrel 2 to move along the axial direction of the main lens barrel 1.
[0041] It should be noted that the main lens barrel 1, focusing lens barrel 2, and focusing handwheel 4 of this split lens are all cylindrical parts, which are simple to process and easy to ensure processing accuracy.
[0042] In the assembly scenario of this embodiment, the focusing lens barrel 2 is first placed into the main lens barrel 1 along the optical axis. When the lens barrel hole 20 of the focusing lens barrel 2 is aligned with and connected to the guide groove 10 of the main lens barrel 1, the focusing block 3 is passed through the guide groove 10 and inserted into the lens barrel hole 20. Finally, the focusing handwheel 4 is fitted onto the outside of the entire main lens barrel 1, and the focusing handwheel 4 is threadedly connected to the focusing block 3.
[0043] In the working scenario of this embodiment, the user turns or drives the focusing handwheel 4 to rotate. The rotation of the focusing handwheel 4 will cause the focusing block 3 to slide in the guide groove 10, thereby causing the focusing lens barrel 2 connected to the focusing block 3 to move along the optical axis, thereby realizing the focusing of the split lens.
[0044] As can be seen from the above assembly and working scenarios, this embodiment has the following advantages: First, the processing is simple; since the focusing lens barrel 2 has a lens barrel hole 20 on its surface, the focusing block 3 can be inserted into the lens barrel hole 20, so the focusing lens barrel 2 and the focusing block 3 are separate assembly structures. Compared with the traditional one-piece focusing structure, this separate assembly focusing structure allows the focusing block 3 and the focusing lens barrel 2 to be processed separately without the need for one-piece precision processing; and there is no need to specially process a clearance groove on the inner wall of the main lens barrel 1 for the focusing block 3 to slide in. Compared with the traditional one-piece structure, the processing is simpler and the design and processing difficulty is reduced. Secondly, assembly is simple. Since the focusing block 3 can be assembled independently, it can be externally mounted after the focusing lens barrel 2 is assembled. Therefore, there is no need to worry too much about protecting the threads of the focusing block 3 during assembly, making assembly simpler and reducing installation difficulty. Thirdly, the user experience is good. The separate focusing block 3 has a reasonable and compact structure design. Users can achieve focusing by turning the handwheel, resulting in a good user experience. Therefore, the separate focusing structure of this embodiment can effectively simplify the processing and assembly process, thereby simplifying the processing and assembly procedures and reducing production, labor, and material costs.
[0045] It should be noted that in this utility model, the separate structure design of the main lens barrel 1, the focusing lens barrel 2, the focusing block 3, and the focusing handwheel 4 simplifies processing and assembly. The relevant assembly methods are methods that can be implemented by those skilled in the art based on common knowledge. These methods are not within the scope of this solution. The above description is only to illustrate the beneficial effects that can be achieved by this improvement of the separate structure design in conjunction with common knowledge. The effect achieved in the embodiments of this utility model does not depend on the implementation of these methods used for illustration.
[0046] In one specific embodiment, such as Figure 1 and Figure 2 As shown, to make the structure of the split lens more stable, the number and matching structure of the guide slots 10, lens barrel holes 20 and focusing blocks 3 are further provided. Multiple guide slots 10, lens barrel holes 20 and focusing blocks 3 are provided in a one-to-one correspondence. That is, each guide slot 10 corresponds to a lens barrel hole 20 and a focusing block 3, so that each focusing block 3 can slide in a guide slot 10 and be inserted into a lens barrel hole 20. Multiple guide slots 10 are arranged along the circumference of the main lens barrel 1. Multiple lens barrel holes 20 and focusing blocks 3 are arranged along the circumference of the focusing lens barrel 2. In specific implementation, multiple focusing blocks 3 are screwed to the internal thread 40 of the focusing handwheel 4 through external threads 30. It can be understood that multiple focusing blocks 3 share the torque, balance the radial force, avoid the deflection and jamming of the focusing lens barrel 2, and enable it to move smoothly along the axial direction.
[0047] Based on the above embodiments, such as Figure 2 As shown, in order to further optimize the force on the focusing lens barrel 2, multiple guide slots 10 are evenly arranged along the circumference of the main lens barrel 1; multiple lens barrel holes 20 and focusing blocks 3 are also evenly arranged along the circumference of the focusing lens barrel 2. It can be understood that the evenly arranged lens barrel holes 20, focusing blocks 3 and guide slots 10 can make the force on the focusing lens barrel 2 more uniform and the movement more stable.
[0048] In this embodiment, as Figure 2 As shown, the guide slot 10, lens barrel hole 20 and focusing block 3 are set to be three in a one-to-one correspondence. Of course, other quantities can be selected by those skilled in the art as needed. This split three-lobed structure is reasonably designed and compact. When using it, the user can achieve focusing by turning the handwheel, which provides a good user experience.
[0049] In one specific embodiment, a fitting structure is further provided between the focusing block 3 and the lens barrel hole 20. The focusing block 3 and the lens barrel hole 20 are either interference fit or clearance fit. For example, the outer diameter of the focusing block 3 is less than or equal to the outer diameter of the lens barrel hole 20, thereby forming a clearance fit; or the outer diameter of the focusing block 3 is greater than the outer diameter of the lens barrel hole 20, thereby forming an interference fit. In specific implementation, the focusing block 3 can be inserted into the lens barrel hole 20 through these two tolerance fit methods.
[0050] In one specific embodiment, such as Figure 1 and Figure 2 As shown, in order to reduce the vibration or impact on the focusing lens when the focusing handwheel 4 is rotated, the split lens also includes an elastic damping element 5; along the axial direction of the lens barrel hole 20, an elastic damping element 5 is provided between the focusing block 3 and the lens barrel hole 20. The elastic damping element 5 is used to buffer the impact force between the focusing handwheel 4 and the focusing lens barrel 2; in specific implementation, when the user turns the focusing handwheel 4, if the focusing handwheel 4 has axial vibration or impact, these vibrations or impacts will be absorbed by the elastic damping element 5, which will play a role in shock absorption and shock resistance, and improve the pressure and shock resistance of the focusing lens.
[0051] In one embodiment, such as Figure 1 and Figure 2 As shown, to avoid misalignment of the elastic damping element 5, the focusing block 3 is provided with a focusing groove 31. The focusing groove 31 is located on the surface of the focusing block 3 adjacent to the elastic damping element 5. The elastic damping element 5 is provided in the focusing groove 31 and protrudes from the surface of the focusing block 3. In specific implementation, when the focusing handwheel 4 experiences axial vibration or impact, the elastic damping element 5 will deform in the focusing groove 31. It can be understood that due to the limitation of the focusing groove 31, the elastic damping element 5 can deform in the focusing groove 31 when under pressure, thus avoiding misalignment.
[0052] Based on the above embodiments, such as Figure 2 As shown, in one embodiment, in order to enable the elastic damping member 5 to deform inward uniformly when compressed, the cross-sectional profile of the focusing groove 31 is matched with the outer cross-sectional profile of the elastic damping member 5 on a plane perpendicular to the axis of the lens barrel hole 20. In specific implementation, for example, both the cross-sectional profile of the focusing groove 31 and the outer cross-sectional profile of the elastic damping member 5 are circular, so that the elastic damping member 5 can deform inward uniformly when deformed, and the damping performance is reliable.
[0053] In this embodiment, the focusing groove 31 is a circular focusing groove 31, and the elastic damping element 5 is an O-shaped or circular elastic ring. It can be understood that after setting the circular elastic ring, on the one hand, the damping effect can be improved, and on the other hand, the focusing feel of the split type can be better, avoiding the problem that the feel and image of the integrated type will become unclear after a period of use.
[0054] In one specific embodiment, such as Figure 1 and Figure 2 As shown, the split lens also includes a rear lens mount 6; the rear lens mount 6 is connected to the main lens barrel 1 and is located at one end of the main lens barrel 1 near the lens of the focusing lens barrel 2. The main lens barrel 1 has multiple threaded holes on its end face, and the rear lens mount 6 has corresponding through holes. Screws 7 pass through the through holes and are screwed into the threaded holes, thereby connecting the rear lens mount 6 to the main lens barrel 1. In specific implementation, the rear lens mount 6 can seal the rear end of the main lens barrel 1, providing a certain degree of protection for the lens inside the focusing lens barrel 2.
[0055] In one embodiment, such as Figure 1 and Figure 2 As shown, a rotatable sleeve structure for the focusing handwheel 4 is further provided. At least one ring of limiting steps 11 is provided on the outer wall of the main lens barrel 1. The two ends of the focusing handwheel 4 abut against the limiting steps 11 and the rear lens mount 6 respectively to limit the axial movement of the focusing handwheel 4.
[0056] Based on the above embodiments, such as Figure 1 As shown, in order to improve the damping feel of the focusing handwheel 4, a damping ring 12 is also clamped between the focusing handwheel 4 and the main lens barrel 1 to improve the rotation feedback and user feel of the focusing handwheel 4.
[0057] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0058] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended 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.
[0059] Finally, it should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.
Claims
1. A split-type manual lens, characterized in that, include: The main lens barrel has a guide groove arranged along its optical axis on its barrel wall. A focusing lens barrel is movably disposed inside the main lens barrel along its optical axis, and a lens barrel hole is provided on the outer wall of the focusing lens barrel; A focusing block is inserted into the lens barrel hole and slides in the guide groove. The focusing block is provided with an external thread that protrudes from the side wall of the main lens barrel. A focusing handwheel is rotatably fitted onto the outside of the main lens barrel. The inner wall of the focusing handwheel is provided with an internal thread, which is screwed into the external thread. The rotation of the focusing handwheel is used to drive the focusing lens barrel to move along the axial direction of the main lens barrel.
2. The split-type manual lens according to claim 1, characterized in that, Multiple guide slots, lens barrel holes, and focusing blocks are provided in a one-to-one correspondence; The plurality of the guide slots are arranged along the circumferential direction of the main lens barrel; The plurality of lens barrel holes and the focusing block are arranged along the circumferential direction of the focusing lens barrel.
3. The split-type manual lens according to claim 2, characterized in that: The plurality of guide slots are evenly arranged along the circumferential direction of the main lens barrel; The plurality of lens barrel holes and the focusing blocks are all evenly arranged along the circumference of the focusing lens barrel.
4. The split-type manual lens according to claim 1, characterized in that, The focusing block is either interference-fitted or clearance-fitted with the lens barrel aperture.
5. The split-type manual lens according to claim 1, characterized in that, The split-type manual lens also includes an elastic damping component; Along the axial direction of the lens barrel hole, the elastic damping element is provided between the focusing block and the lens barrel hole. The elastic damping element is used to buffer the impact force between the focusing handwheel and the focusing lens barrel.
6. The split-type manual lens according to claim 5, characterized in that, The focusing block has a focusing groove located on the surface of the focusing block adjacent to the elastic damping member. The elastic damping member is located inside the focusing groove and protrudes from the surface of the focusing block.
7. The split-type manual lens according to claim 6, characterized in that, Along a plane perpendicular to the axis of the lens barrel hole, the cross-sectional profile of the focusing groove matches the outer cross-sectional profile of the elastic damping element.
8. The split-type manual lens according to claim 7, characterized in that: The focusing groove is a circular focusing groove; The elastic damping element is a circular elastic ring.
9. The split-type manual lens according to claim 1, characterized in that, The split-type manual lens also includes a rear lens mount; The rear lens mount is connected to the main lens barrel, and the rear lens mount is located at one end of the main lens barrel adjacent to the lens of the focusing lens barrel.
10. The split-type manual lens according to claim 9, characterized in that, The outer wall of the main lens barrel is provided with at least one limiting step; The two ends of the focusing handwheel abut against the limiting step and the rear lens mount, respectively, to restrict the axial movement of the focusing handwheel.