Adaptive high-stability non-empty-back sighting telescope variable magnification sliding optical assembly

Abstract

This invention discloses an adaptive, highly stable, zero-backlash zoom sliding optical assembly for a scope, belonging to the field of optical scope technology. It includes a zoom lens tube; a zoom cam; a second lens frame for the steering group; a bearing; a third lens frame for the steering group; a guide screw; optical glass; a first lens frame for the steering group; and an inner hole with multiple bosses for guidance and support. All internal sliding parts have axial through grooves to form an elastic adaptive structure, with the sliding parts and the inner walls of the bosses using an interference fit. The cam and bearing use a rolling fit. The zoom lens tube undergoes ion deburring and an ion-hardened matte coating process on the inner wall, along with three stages of low-temperature aging to eliminate internal stress. This invention solves the problems of traditional zoom mechanisms such as sliding jamming, high wear, optical axis misalignment, dust accumulation, and blurred imaging. The structure is wear-resistant and long-lasting, with stable aiming accuracy. Its innovative boundaries are clear, making it suitable for civilian, military, and competition scenarios, and suitable for mass production of various high-precision optical scopes.

Description

Technical Field

[0001] This invention belongs to the field of optical sight component manufacturing technology, specifically relating to a highly stable, low-wear, and offset-free sight zoom sliding optical assembly. Background Technology

[0002] Traditional optical sight zoom mechanisms generally have several drawbacks:

[0003] 1. The inner wall of the lens tube is a smooth, round structure, with few sliding guide support points for the lens assembly. After long-term variable magnification sliding, the lens assembly is prone to radial displacement, causing the optical center axis to deviate and the aiming accuracy to continuously decrease. Traditional lens tubes often use only 6061 aluminum tubes, which are insufficient in strength under high-intensity impact conditions. In addition, the burrs of ordinary aluminum tubes are not thoroughly cleaned during processing, and dust continuously falls and contaminates the optical path during assembly and use. The inner wall has no wear-resistant and light-absorbing protection, resulting in severe wear and stray light due to long-term sliding, and poor image clarity.

[0004] 2. The frames that support the optical glass are mostly integral closed circular structures without elastic compensation structures, making it difficult to control the gap between the frame and the inner wall of the lens tube: if the gap is too large, the lens will wobble and have a large amount of backlash; if the gap is too small, the assembly resistance will be large and the sliding will be stuck, and there is no adaptive elastic compensation capability.

[0005] 3. The variable magnification cam and the guide bearing adopt a pure sliding friction fit. After tens of thousands of rotations, the wear will increase significantly, the variable magnification operation will feel dry and stuck, and the return clearance will continue to increase with the number of uses.

[0006] 4. The optical glass and the frame do not have a reasonable buffer gap. After being pressed and limited, the glass is prone to displacement due to impact and temperature deformation. At the same time, the sliding fit gap cannot be returned to zero, and the problem of optical axis offset throughout the zoom range cannot be completely solved. Summary of the Invention

[0007] To address the shortcomings of existing scope zoom mechanisms, such as sliding jamming, optical axis misalignment, high wear, dust accumulation, poor image quality, long-term accuracy degradation, and the inability to adapt to high and low intensity operating conditions due to the single material of the scope tube, an adaptive, highly stable, and backlash-free scope zoom sliding optical component is provided. This component utilizes a multi-protrusion guide tube, a fully sliding elastic slotted adaptive structure, a rolling cam guide, a precision interference fit, and multi-layer low-temperature aging and ion special surface treatment processes, combined with a multi-specification heat-treated aluminum alloy scope tube material system. This results in smooth, offset-free zooming, wear resistance and long-term durability, a clean optical path, and long-term stable aiming accuracy, making it suitable for various application scenarios, including conventional, high-intensity, and lightweight applications.

[0008] The technical solution of this invention is as follows:

[0009] An adaptive, highly stable, zero-return scope zoom sliding optical assembly includes a zoom lens tube (1), a zoom cam (2), a steering group second lens frame (3), a bearing (4), a steering group third lens frame (5), a curved groove (6), and a guide screw (7).

[0010] The inner wall of the zoom lens tube (1) is integrally formed with multiple boss guide support structures (14), and the zoom lens tube (1) is provided with guide grooves (15).

[0011] Both the second mirror frame (3) and the third mirror frame (5) of the steering group are milled with through grooves along the axial direction;

[0012] The variable magnification cam has two curved grooves, and the curved grooves of the bearing (4) and the variable magnification cam (2) are in a rolling fit structure.

[0013] Guide screws (7) are installed on the second mirror frame (3) and the third mirror frame (5) of the steering group. A bearing (4) is fitted on the guide screw (7). The upper part of the bearing (4) is located in the corresponding curved groove (6) and can slide relative to it, and the lower part is located in the guide groove (15) and can slide relative to it.

[0014] The second lens frame (3) and the third lens frame (5) of the steering group are slidably placed inside the zoom lens tube (1), and the outer walls of the second lens frame (3) and the third lens frame (5) of the steering group are tightly attached to the inner wall of the zoom lens tube (1).

[0015] The spacing between the two curved grooves (6) shows a smooth, gradual trend.

[0016] The end of the zoom lens tube (1) is equipped with a first lens frame (10), and the first lens frame (10), the second lens frame (3), and the third lens frame (5) are arranged in sequence, with their optical central axes remaining coaxial.

[0017] Optical glass (9) is installed in both the second mirror frame (3) and the third mirror frame (5) of the steering group. The gap between the optical glass (9) and the inner wall of the mirror frame on one side is controlled to be 0.10-0.15mm, and the minimum gap is not less than 0.1mm.

[0018] The optical glass (9) is pressed and limited by an open three-wave ring (8) on the end face. The lens frame is fitted and limited by a guide screw (7). During the sliding process, the gap is reduced to zero. The optical center axis remains coaxial and does not deviate throughout the zoom process.

[0019] The steering group second mirror frame (3) and steering group third mirror frame (5) are threadedly connected to the guide screw, and the threaded holes at the connection are locally reinforced with glue.

[0020] The processing flow of the zoom lens tube (1) is as follows:

[0021] Cutting of seamless cold-drawn aluminum alloy tubes;

[0022] First stage of low-temperature aging: 80℃ for 2 hours;

[0023] Rough machining of the external shape and boss guide support structure;

[0024] Second stage of low-temperature aging: 60℃, heat preservation for 3 hours;

[0025] Pre-treatment of workpieces by degreasing and cleaning;

[0026] Third stage low-temperature aging: 50℃, heat preservation for 2 hours;

[0027] The boss guide support structure is precision honed and finished.

[0028] Full-area ion deburring treatment;

[0029] Ion hard matte film coating on the inner wall of the inner hole.

[0030] After full-area ion deburring treatment, an ion hard matting film was prepared on the inner wall of the boss guide support structure of the zoom lens tube (1). The film thickness was controlled at 5-10 μm. The adhesion of the cross-cut method reached level 0. After 5000 cycles of sliding test, the film layer did not fall off.

[0031] The three-stage low-temperature aging process in the processing flow of the variable magnification tube (1) includes: 80℃ for 2 hours before blank processing; 60℃ for 3 hours after rough processing of the shape and multiple bosses; and 50℃ for 2 hours before fine processing of the inner hole, sliding groove and honing process.

[0032] The boss guide support structure of the zoom lens tube (1) is precision machined by honing, with a hole diameter consistency fluctuation of ≤ 0.02mm and an inner hole straightness of ≤ 0.02mm.

[0033] The technical effects and advantages of this invention are as follows:

[0034] 1. The present invention adopts a multi-protrusion guide support structure, supports the sliding frame at multiple points, greatly improves the roundness and straightness accuracy of the inner diameter of the zoom lens tube (1), the sliding action of the lens group is smooth throughout the process, and at the same time reduces stray light on the inner wall and improves the image clarity;

[0035] 2. All internal sliding parts are provided with axial through grooves to form an elastic adaptive structure. This is not limited to the steering group second mirror frame (3) and steering group third mirror frame (5). All sliding parts can rely on their own metal elasticity to compensate for the tolerance, fit tightly, and have very small gaps, thus eliminating the problems of magnification shaking and optical axis offset. The width of the through groove can be flexibly adjusted to adapt to different specifications of parts.

[0036] 3. The variable magnification cam (2) curve groove and bearing (4) are changed to rolling fit, which greatly reduces friction and wear. After 10,000 uses, there is no obvious jamming, and the overall reliability of the machine is significantly improved. The optical glass (9) has a reasonable buffer gap, and the end face is pressed and the guide screw fits the double limit. The glass does not shift under impact, the optical axis is constant throughout the variable magnification process, and the aiming accuracy is high.

[0037] 4. The three-stage low-temperature aging process eliminates the internal stress of the pipe processing, and the dimensions will not be deformed during long-term use. At the same time, the material of the zoom lens tube (1) is limited to heat-treated seamless cold-drawn aluminum alloy pipe. Various grades such as 6061-T6, 7075-T6, and 6082-T6 can be flexibly selected according to the working conditions to solve the defects of the traditional solution that is limited to a single material and cannot be adapted to different strength requirements.

[0038] 5. Variable magnification tube (1) Full-area ion deburring + inner wall ion hard matting film dual process, no burrs to avoid dust falling and contaminating the optical path, strong film adhesion and excellent wear resistance, 5000 cycles of sliding without falling off, and stable sliding feel after long-term use.

[0039] 6. This invention is not a simple superposition of existing technical features; the multi-protrusion guide support, the elastic slotted mirror frame interference fit, the cam-bearing rolling transmission, the three-stage low-temperature aging, and the ion special surface treatment form a synergistic relationship. It is impossible to achieve the comprehensive effect of zero backlash and low wear, long-term stability of the optical axis, and clean optical path and anti-dust by relying on a single technical feature. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 This is a schematic diagram of the structure when the variable-amplification cam is removed.

[0042] Figure 3 Schematic diagram of the steering group's two-frame and three-frame structures;

[0043] Figure 4 This is a schematic diagram of the zoom lens tube structure;

[0044] Figure 5 This is a schematic diagram showing the location of the boss guide support structure.

[0045] Figure 6 This is a schematic diagram of a variable-amplitude cam structure.

[0046] Figure 7 This is a schematic cross-sectional view of the overall structure of the present invention;

[0047] Figure 8 This is a flowchart of the manufacturing process for a zoom lens tube.

[0048] Figure description: Variable magnification lens tube (1); Variable magnification cam (2); Steering group second lens frame (3); Bearing (4); Steering group third lens frame (5); Curved groove (6); Guide screw (7); Opening three-wave ring (8); Optical glass (9); Steering group first lens frame (10); Preload sealing ring (11); Variable magnification cam washer (12); Through groove (13); Boss guide support structure (14). Detailed Implementation

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1

[0051] like Figures 1 to 6 The adaptive high-stability zero-backlash scope zoom sliding optical assembly shown includes a zoom lens tube (1), a zoom cam (2), a steering group second lens frame (3), a bearing (4), a steering group third lens frame (5), a curved groove (6), and a guide screw (7).

[0052] The inner wall of the zoom lens tube (1) is integrally formed with a three-protrusion guide support structure (14), and a guide groove (15) is provided on the zoom lens tube (1).

[0053] Both the second mirror frame (3) and the third mirror frame (5) of the steering group are milled with through grooves 13 along the axial direction;

[0054] The variable magnification cam has two curved grooves (6), and the curved grooves (6) of the bearing (4) and the variable magnification cam (2) are in a rolling fit structure.

[0055] Guide screws (7) are installed on the second mirror frame (3) and the third mirror frame (5) of the steering group. A bearing (4) is fitted on the guide screw (7). The upper part of the bearing (4) is located in the corresponding curved groove (6) and can slide relative to it, and the lower part is located in the guide groove (15) and can slide relative to it.

[0056] Furthermore, the second lens frame (3) and the third lens frame (5) of the steering group are slidably placed inside the zoom lens tube (1), and the outer walls of the second lens frame (3) and the third lens frame (5) of the steering group are tightly attached to the inner wall of the zoom lens tube (1).

[0057] Furthermore, the spacing between the two curved grooves (6) exhibits a smooth, gradual change trend.

[0058] Furthermore, the end of the zoom lens tube (1) is equipped with a first lens frame (10), and the first lens frame (10), the second lens frame (3), and the third lens frame (5) are arranged in sequence, with their optical central axes remaining coaxial.

[0059] Furthermore, optical glass (9) is installed in both the second mirror frame (3) and the third mirror frame (5) of the steering group. The gap between the optical glass (9) and the inner wall of the mirror frame is controlled to be 0.10-0.15 mm on one side, and the minimum gap is not less than 0.1 mm.

[0060] Furthermore, the optical glass (9) is pressed and limited by an open three-wave ring (8) on the end face, and the lens frame is fitted and limited by a guide screw (7). During the sliding process, the gap between the parts is reduced to zero, and the optical center axis remains coaxial and does not deviate throughout the zoom process.

[0061] Furthermore, the steering group second mirror frame (3) and steering group third mirror frame (5) are threadedly connected to the guide screw, and the threaded holes at the connection are locally reinforced with glue.

[0062] Furthermore, the preload between the zoom lens tube (1) and the zoom cam (2) is adjusted by the preload sealing ring (11) and the zoom cam washer (12).

[0063] Example 2

[0064] like Figure 7 As shown, the processing flow of the zoom lens tube (1) is as follows:

[0065] Cutting of seamless cold-drawn aluminum alloy tubes;

[0066] First stage of low-temperature aging: 80℃ for 2 hours;

[0067] Rough machining of the external shape and boss guide support structure;

[0068] Second stage of low-temperature aging: 60℃, heat preservation for 3 hours;

[0069] Pre-treatment of workpieces by degreasing and cleaning;

[0070] Third stage low-temperature aging: 50℃, heat preservation for 2 hours;

[0071] The boss guide support structure is precision honed and finished.

[0072] Full-area ion deburring treatment;

[0073] Ion hard matte film coating on the inner wall of the inner hole.

[0074] Furthermore, after full-area ion deburring treatment, an ion hard matting film is prepared on the inner wall of the boss guide support structure of the zoom lens tube (1). The film thickness is controlled at 5-10 μm, the adhesion of the cross-cut method reaches level 0, and the film layer does not fall off after 5000 reciprocating sliding tests.

[0075] Furthermore, the three-stage low-temperature aging treatment in the processing flow of the variable magnification tube (1) includes: 80℃ for 2 hours before blank processing; 60℃ for 3 hours after rough processing of the shape and multiple bosses; and 50℃ for 2 hours before fine processing of the inner hole, sliding groove and honing process.

[0076] Furthermore, the boss guide support structure of the zoom lens tube (1) is precision machined by honing, with a hole diameter consistency fluctuation of ≤0.02mm and an inner hole straightness of ≤0.02mm.

[0077] Furthermore, the seamless cold-drawn aluminum alloy tube is a heat-treated seamless cold-drawn aluminum alloy tube, and can be any one of 6061-T6, 7075-T6, 6082-T6 or 5052-O.

[0078] Standard general-purpose model—6061-T6 seamless cold-drawn aluminum tube, with minimal processing deformation, high cost performance, and corrosion resistance, suitable for civilian and general training scopes;

[0079] High-strength heavy-duty version—7075-T6 seamless cold-drawn aluminum tube, with significantly improved tensile strength and hardness, excellent impact resistance, suitable for military and outdoor high-intensity impact scenarios;

[0080] High-precision and stable version—6082-T6 seamless cold-drawn aluminum tube, with stronger dimensional stability and lower internal stress after heat treatment, suitable for high-precision competition-grade scopes;

[0081] Lightweight and rust-resistant version—5052-O aluminum-magnesium alloy tubing, with lower weight, resistant to salt spray corrosion, and suitable for portable small optical sights.

[0082] Technical principle:

[0083] Furthermore, the guide bearing (4) is a rolling guide component, which, in conjunction with the curve groove of the zoom cam (2), achieves low-wear rolling transmission, reduces wear from tens of thousands of rotations, and stabilizes the zoom operation feel. By rotating the zoom cam, the second lens frame (3) and the third lens frame (5) of the steering group can move axially along the corresponding curve groove, thereby changing the spacing between each lens frame and achieving zoom.

[0084] Furthermore, the width of the through slot in the elastic slotted adaptive structure can be adjusted according to the wall thickness and elasticity requirements of the part, and is not limited to a width of 1mm.

[0085] Furthermore, the interference amount of the interference fit is determined through batch testing based on the material of the parts, wall thickness, sliding feel, and elasticity compensation requirements, while simultaneously satisfying the two indicators of sufficient elasticity and smooth sliding of the parts.

[0086] Furthermore, the variable magnification lens tube (1) undergoes full-area ion deburring treatment to remove burrs from the tube wall without any dead angles, reducing the risk of dust contamination of the optical path after assembly.

[0087] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adaptive, highly stable, zero-backlash sight zoom sliding optical component, characterized in that: It includes a zoom lens tube (1), a zoom cam (2), a steering group second lens frame (3), a bearing (4), a steering group third lens frame (5), a curved groove (6), and a guide screw (7). The inner wall of the zoom lens tube (1) is integrally formed with multiple boss guide support structures (14), and the zoom lens tube (1) is provided with guide grooves (15). Both the second mirror frame (3) and the third mirror frame (5) of the steering group are milled with through grooves (13) along the axial direction. The variable magnification cam has two curved grooves (6), and the curved grooves of the bearing (4) and the variable magnification cam (2) are in a rolling fit structure. Guide screws (7) are installed on the second mirror frame (3) and the third mirror frame (5) of the steering group. A bearing (4) is fitted on the guide screw (7). The upper part of the bearing (4) is located in the corresponding curved groove (6) and can slide relative to it, and the lower part is located in the guide groove (15) and can slide relative to it.

2. The adaptive high-stability zero-backlash scope zoom sliding optical component according to claim 1, characterized in that: The second lens frame (3) and the third lens frame (5) of the steering group are slidably placed inside the zoom lens tube (1), and the outer walls of the second lens frame (3) and the third lens frame (5) of the steering group are tightly attached to the inner wall of the zoom lens tube (1).

3. The adaptive high-stability zero-backlash scope zoom sliding optical component according to claim 1, characterized in that: The spacing between the two curved grooves (6) shows a smooth, gradual trend.

4. The adaptive high-stability zero-backlash scope zoom sliding optical component according to claim 1, characterized in that: The end of the zoom lens tube (1) is equipped with a first lens frame (10), and the first lens frame (10), the second lens frame (3), and the third lens frame (5) are arranged in sequence, with their optical central axes remaining coaxial.

5. The adaptive high-stability zero-backlash sight zoom sliding optical component according to claim 1, characterized in that: Optical glass (9) is installed in both the second mirror frame (3) and the third mirror frame (5) of the steering group. The gap between the optical glass (9) and the inner wall of the mirror frame on one side is controlled to be 0.10-0.15mm, and the minimum gap is not less than 0.1mm.

6. The adaptive high-stability zero-backlash scope zoom sliding optical component according to claim 1, characterized in that: The optical glass (9) is pressed and limited by an open three-wave ring (8) on the end face. The lens frame is fitted and limited by a guide screw (7). During the sliding process, the gap is reduced to zero. The optical center axis remains coaxial and does not deviate throughout the zoom process.

7. The adaptive high-stability zero-backlash scope zoom sliding optical component according to claim 1, characterized in that: The steering group second mirror frame (3) and steering group third mirror frame (5) are threadedly connected to the guide screw, and the threaded holes at the connection are locally reinforced with glue.

8. The adaptive high-stability zero-backlash sight zoom sliding optical component according to claim 1, characterized in that: The processing flow of the zoom lens tube (1) is as follows: Cutting of seamless cold-drawn aluminum alloy tubes; First stage of low-temperature aging: Before processing the blank, keep it at 80℃ for 2 hours; Rough machining of the external shape and boss guide support structure; Second stage of low-temperature aging: 60℃, heat preservation for 3 hours; Pre-treatment of workpieces by degreasing and cleaning; Third stage low-temperature aging: 50℃, heat preservation for 2 hours; The boss guide support structure is precision honed and finished. Full-area ion deburring treatment; Ion hard matte film coating on the inner wall of the inner hole.

9. The adaptive high-stability zero-backlash scope zoom sliding optical component according to claim 8, characterized in that: After full-area ion deburring treatment, an ion hard matting film is prepared on the inner wall of the boss guide support structure of the zoom lens tube (1). The film thickness is controlled at 5-10 μm. The adhesion of the cross-cut method reaches level 0. After 5000 cycles of sliding test, the film layer does not fall off.

10. The adaptive high-stability zero-backlash scope zoom sliding optical component according to claim 8, characterized in that: The boss guide support structure of the zoom lens tube (1) is precision machined by honing, with a hole diameter consistency fluctuation of ≤ 0.02mm and an inner hole straightness of ≤ 0.02mm.

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