Optical Sight Objective Lens Fixing via Soft Spherical Members
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing optical sights face position deviation of the objective lens in the diameter direction due to impacts, such as recoil from firearms, leading to misalignment of the image and reticle, which complicates manufacturing and requires precise parts matching and adhesive management.
Innovation Solution
Incorporating a cylindrical lens frame with multiple through-holes and fixing members made of softer materials, allowing direct fixation of the objective lens to the barrel body, eliminating the need for precise screw clearances and adhesive management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the objective lens is fixed using adhesive in elongated holes with male screws, then the lens can be held in position, but the lens position deviates in the diameter direction due to impacts such as recoil
Solution Approach 1:
The fixing mechanism is segmented into multiple independent spherical fixing members distributed around the lens, rather than relying on a single adhesive bond. This segmentation allows each fixing member to independently maintain lens position while distributing impact forces, preventing positional deviation during recoil or transportation.
Solution Approach 2:
Spherical fixing members made of softer material are introduced as intermediaries between the lens and the barrel body. These fixing members deform under impact to absorb shock while maintaining lens position, and their softer material prevents damage to the lens during assembly and operation.
2Manufacturing precision
If male screws and female screws are used with tight clearance for precise positioning, then manufacturing precision improves, but the manufacturing process becomes more complex and time-consuming
Solution Approach 1:
The spherical fixing members are designed as simple, inexpensive components that can be easily manufactured and replaced. Their simple spherical geometry eliminates the need for precise screw clearance matching, allowing standardization of parts and simplification of the manufacturing process while maintaining lens positioning accuracy.
Solution Approach 2:
The fixing mechanism transitions from rigid screw-threaded connections requiring precise clearance to spherical elements with controlled softness. This parameter change in material properties and geometric form allows for easier assembly and manufacturing while achieving the same positioning function.
3Reliability
If adhesive is injected into elongated holes to fix lenses, then lens fixation is achieved, but adhesive management becomes complex and may affect screw threading
Solution Approach 1:
The adhesive is completely removed from the fixing mechanism. Instead of using adhesive in elongated holes, the invention employs spherical fixing members that mechanically secure the lens through deformation and friction, eliminating adhesive management complexity and potential contamination of screw threads.
4Ease of manufacture
If the objective lens is not directly fixed to the barrel body, then assembly is easier, but the lens position deviates under impact in the diameter direction
Solution Approach 1:
The spherical fixing members are pre-installed in the barrel body before lens assembly. These fixing members are positioned to contact the lens outer peripheral surface, providing immediate impact resistance while allowing easy lens installation without complex adhesive procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively prevents position deviation of the objective lens, simplifies manufacturing by reducing the need for precise parts matching and adhesive management, and enhances production efficiency.
Implementation Method 1
each of the plurality of fixing members is made of a metal or synthetic resin having a hardness lower than that of the lens barrel
Data Source
AI summary
Provided is an optical sight having a lens frame and multiple fixing members for fixing an objective lens to an inside of a barrel body. The objective lens is held on an inner peripheral surface of a lens frame. A male screw, which can be screwed into a female screw arranged on the inner peripheral surface of a barrel body, is arranged on an outer peripheral surface of the lens frame. Multiple through-holes are formed at a wall section of the lens frame corresponding to the outer peripheral surface of the objective lens along a circumferential direction of the wall section. The fixing member is made of metal or synthetic resin having a hardness lower than that of the barrel body. An assembly including the objective lens, the lens frame, and the fixing members is screwed into the female screw arranged on the inner peripheral surface of the barrel body.