Split sleeve structure for integrated machine lens and glass-plastic lens

Abstract

The utility model provides a split type sleeve structure for integrated machine lens and glass plastic lens, including support, connecting piece, sleeve, with the support split setting, the sleeve is detachable connection through the hollow cylinder of connecting piece top with support, wherein, the sleeve outer wall is equipped with the limit structure with the inside structure cooperation of support, the sleeve inner wall is equipped with the positioning structure for installing lens, the utility model has maintained the overall rigidity of lens barrel, improved the positioning precision and assembly stability of lens significantly, and through split design makes the material selection of each component more targeted, effectively solved the technical contradiction that traditional integrated structure is difficult to take into account between strength and precision.

Description

Technical Field

[0001] This utility model relates to a split sleeve structure for integrated camera lenses and glass-plastic lenses. Background Technology

[0002] Currently, Focus and Zoom both use this integrated barrel structure, with a maximum coaxiality accuracy of 0.01mm, which is difficult to improve further with existing mold forming technology. The barrel's shape is complex and non-uniformly symmetrical, resulting in uneven cooling and shrinkage after molding, which affects the barrel's roundness and coaxiality. On the other hand, since the barrel is an "L"-shaped structure, it needs sufficient strength to move and support, and deformation should be minimized at high and low temperatures. Therefore, the material must be PC with at least 30% GF (Tensile Modulus > 6000MPa) to meet the strength requirements. At the same time, the fiber-reinforced PC material has poorer fluidity during molding, and the non-uniform arrangement of the glass fibers also reduces the roundness and coaxiality of the barrel.

[0003] However, with the application and development of optical lenses, the market demand for high-quality, high-performance lenses has been continuously increasing. For example, lens pixel counts have increased from 5MP to 8K, and even 48MP; sensor sizes have decreased from 1 / 2.7” to 1”; and requirements for lens distortion, chromatic aberration, and temperature drift performance have become increasingly stringent. These factors have brought significant difficulties and challenges to optical design. To meet design specifications, the proportion of aspherical lenses used in lenses is constantly increasing, resulting in lenses with increasingly higher sensitivity. Therefore, the current integrated barrel structure in cameras can no longer meet the optical performance requirements. Utility Model Content

[0004] This invention provides a split sleeve structure for integrated camera lenses and glass-plastic lenses, which can effectively solve the above problems.

[0005] This utility model is implemented as follows:

[0006] Split-type sleeve structure for integrated camera lenses and glass-plastic lenses, including

[0007] support;

[0008] Connectors;

[0009] The sleeve is separately disposed from the bracket, and the sleeve is detachably connected to the bracket through a hollow cylinder at the top of the connector; wherein, the outer wall of the sleeve is provided with a limiting structure that cooperates with the internal structure of the bracket, and the inner wall of the sleeve is provided with a positioning structure for installing the lens.

[0010] The beneficial effects of this utility model are:

[0011] (1) The split lens structure designed in this utility model splits the traditional one-piece lens barrel into two independent parts: a support and a sleeve. The support is made of high glass fiber content material to ensure structural strength, while the sleeve adopts an optimized design to achieve precise positioning. The limiting structure on the outer wall of the sleeve is precisely matched with the inside of the support to ensure coaxiality, and the positioning structure on the inner wall precisely constrains the position of the lens. This structural division of labor maintains the overall rigidity of the lens barrel and significantly improves the positioning accuracy and assembly stability of the lens. At the same time, the split design makes the material selection of each component more targeted, effectively solving the technical contradiction that it is difficult to balance strength and precision in the traditional one-piece structure. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is the front view of this utility model.

[0014] Figure 2 This is an assembly diagram of the bracket and sleeve of this utility model.

[0015] Figure 3 This is a structural diagram of the sleeve of this utility model.

[0016] Explanation of icon numbers:

[0017] 10. Bracket; 20. Connector;

[0018] 30. Hollow cylinder; 300. First inner convex ring; 302. Second inner convex ring;

[0019] 40. Sleeve; 400. Limiting sleeve; 402. Annular protrusion;

[0020] 50. First mounting section; 60. Reinforcing rib; 70. Second mounting section. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0022] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Reference Figure 1-3 As shown, a split-type sleeve structure for integrated camera lenses and glass-plastic lenses includes...

[0024] The bracket 10; the connector 20; the bracket 10 is provided with a first mounting part 50, the top of the connector 20 is provided with several reinforcing ribs 60, and the second mounting part 70 is provided on the outer periphery of the connector 20; the materials of the bracket 10 and the connector 20 are both polycarbonate + 30% glass fiber (the hollow cylinder 30 is also part of the bracket 10, that is, the bracket 10, the connector 20 and the hollow cylinder 30 together constitute the bracket assembly). Specifically, bracket 10 and connector 20 are dedicated to mechanical support, while sleeve 40 is independently responsible for optical positioning. The high glass fiber content PC material ensures that the bracket can maintain the torsional performance of the L-shaped structure (measured torque load > 5 N·m) even in a split structure. Although 30% glass fiber will reduce injection flowability, since the bracket does not require ultra-high precision (allowing a tolerance of 0.01-0.015 mm), this can be solved by optimizing the gate design (such as a fan-shaped gate), while the low glass fiber content of sleeve 40 is not subject to this limitation. If PC + 30% GF is used as the whole, the roundness of the sleeve 40 area will deteriorate (±0.008 mm) due to uneven glass fiber distribution. If the overall glass fiber content is reduced, the strength at the L-shaped corner will be insufficient. Therefore, by using a split design, only bracket 10 and connector 20 retain high glass fiber material, which satisfies the strength requirements and avoids the negative impact on the precision of sleeve 40.

[0025] The sleeve 40 is separately disposed from the bracket 10 and is detachably connected to the bracket 10 via a hollow cylinder 30 at the top of the connector 20. The outer wall of the sleeve 40 has a limiting structure that cooperates with the internal structure of the bracket 10. The limiting structure is a limiting cylinder 400 disposed on the outer wall of the sleeve 40, which cooperates with a second inner convex ring 302. The inner wall of the sleeve 40 has a positioning structure for mounting a lens. The positioning structure is an annular protrusion 402 disposed on the inner wall of the sleeve 40. The hollow cylinder 30 includes a first inner convex ring 300 and a second inner convex ring 302 spaced apart along the axial direction.

[0026] In one embodiment, during lens assembly, the lens needs to be precisely pressed into the annular protrusion 402 on the inner wall of the sleeve 40. Traditional designs typically use right angles or small-angle chamfers (such as 15°), which results in excessive lens insertion force (usually above 5N), easily causing stress concentration at the lens edge and even breakage (especially for brittle glass lenses). However, by designing the contact edge of the annular protrusion 402 to be a 30° chamfer, the contact surface between the lens edge and the annular protrusion can form a progressive guide (rather than a right-angle hard contact), effectively dispersing the insertion stress.

[0027] The sleeve 40 has a coefficient of thermal expansion close to that of the lens. Specifically, through a split design, the sleeve 40 can be independently made of a material with a coefficient of thermal expansion close to that of the lens (such as PC with low glass fiber content), allowing both to expand and contract synchronously with temperature changes, thus preventing stress deformation of the lens. In one embodiment, the sleeve 40 is preferably made of PC material with a glass fiber content ≤10%, whose coefficient of thermal expansion is on the same order of magnitude as that of commonly used plastic lenses (such as PMMA or COP), thereby significantly improving temperature drift performance.

[0028] Specifically, this design retains the L-shaped structure and continues to use PC+30%GF material (tensile modulus > 6000MPa). External connection is achieved through the first / second mounting parts 50 / 70, and bending moment is resisted by the reinforcing ribs 60. The hollow cylinder 30 provides the mounting reference for the sleeve 40 (accuracy requirements relaxed to 0.01-0.015mm). The sleeve 40 is simplified into an axisymmetric cylinder, using PC+5%GF material, with a uniform wall thickness design (thickness tolerance ±0.05mm) to eliminate shrinkage differences. The low glass fiber content ensures uniform orientation and distribution of the injection-molded glass fiber. Furthermore, the precise fit between the limiting cylinder 400 and the second inner convex ring 302 (gap 0-0.005mm) improves roundness / coaxiality to ≤0.005mm.

[0029] Furthermore, the structural coordination mechanism of this case is as follows: external load → first / second mounting parts 50 / 70 → bracket 10 → reinforcing ribs 60 of connector 20 disperse stress, sleeve 40 completely avoids mechanical stress; and thermal deformation is controlled by sleeve CTLE (65×10 -6 / ℃) and lenses (70×10 -6The fit is matched at a temperature difference of 60℃, and the gap change is less than 1μm. After the sleeve 40 is demolded, it undergoes a second heat treatment (80℃×4h) to release internal stress, and the roundness is improved by another 30%. Therefore, the split design in this case is not a simple component disassembly, but rather a breakthrough in the existing technical bottlenecks in three dimensions: material selection, molding process, and thermal management, by reconstructing the "mechanical-optical" functional allocation system of the lens barrel (the sleeve 40 can be independently selected from low glass fiber PC material, which matches the CLTE lens to reduce temperature drift).

[0030] Working Principle: This design separates the traditional one-piece L-shaped lens barrel into a functionally independent support assembly and a sleeve assembly. The support assembly uses high glass fiber content (PC + 30% GF) material to maintain structural strength, and its connector 20 and hollow cylinder 40 structure provide the mounting base. The sleeve assembly is made of low glass fiber content (PC + 5% GF) material into a regular cylinder. Positioning is achieved through the precise fit between the limiting cylinder 400 and the inner convex ring of the hollow cylinder 40 of the support. At the same time, the annular protrusion 402 on the inner wall of the sleeve 40 provides precise constraint on the lens. This split design allows the support to withstand mechanical stress, while the sleeve 40 is dedicated to optical positioning. The two work together through an optimized connection structure, which not only meets the lens's structural strength requirements but also achieves ultra-high precision optical alignment. Meanwhile, the matching of thermal expansion of the materials significantly reduces the impact of temperature changes on image quality.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A split sleeve structure for an integrated lens and a glass-plastic lens, characterized in that, Includes a support (10); Connector (20); The sleeve (40) is separately set from the bracket (10). The sleeve (40) is detachably connected to the bracket (10) through the hollow cylinder (30) at the top of the connector (20). The outer wall of the sleeve (40) is provided with a limiting structure that cooperates with the internal structure of the bracket (10), and the inner wall of the sleeve (40) is provided with a positioning structure for installing the lens.

2. The split sleeve structure for an all-in-one lens and a glass-plastic lens according to claim 1, wherein, The hollow cylinder (30) includes a first inner convex ring (300) and a second inner convex ring (302) spaced apart along the axial direction.

3. The split sleeve structure for the integrated machine lens and the glass-plastic lens according to claim 2, wherein, The limiting structure is a limiting cylinder (400) disposed on the outer wall of the sleeve (40), and the limiting cylinder (400) cooperates with the second inner convex ring (302).

4. The split sleeve structure for the integrated machine lens and glass-plastic lens according to claim 1, wherein, The positioning structure is an annular protrusion (402) provided on the inner wall of the sleeve (40).

5. The split-type sleeve structure for integrated camera lenses and glass-plastic lenses according to claim 1, characterized in that, The materials of the bracket (10) and the connector (20) are both polycarbonate + 30% glass fiber.

6. The split-type sleeve structure for integrated camera lenses and glass-plastic lenses according to claim 1, characterized in that, The coefficient of thermal expansion of the sleeve (40) is close to that of the lens.

7. The split-type sleeve structure for integrated camera lenses and glass-plastic lenses according to claim 1, characterized in that, The bracket (10) is provided with a first mounting part (50), the top of the connector (20) is provided with a plurality of reinforcing ribs (60), and a second mounting part (70) is provided on the outer periphery of the connector (20).

Images