Camera Lens Mount With Dual O-Ring Fixation Against Tilt
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Solution Overview
Problem
Conventional camera lens securing methods, such as lock nuts, clamping screws, and adhesives, are inadequate for preventing lens tilt and shifting, leading to image distortion and moisture ingress, while existing O-ring solutions do not adequately secure lenses without damaging threads or allowing further focus adjustments.
Innovation Solution
A camera design featuring a tube fitting with two circumferential grooves on its inner circumference, each containing an elastic O-ring, securely fixes the lens by frictional engagement, preventing tilt and moisture ingress, and allowing secure focus adjustment without thread damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single O ring is used in the lens receptacle, then the lens can be secured against axial shifting, but the lens can still tilt and moisture can ingress
Solution Approach 1:
The single O ring is segmented into two separate circumferential grooves spaced apart along the optical axis. The first groove contains one O ring and the second groove contains another O ring, creating multiple discrete sealing and securing points that prevent both axial shifting and tilting while maintaining moisture tightness
Solution Approach 2:
The solution transitions from a single-point securing mechanism to a distributed multi-point mechanism by spacing the two circumferential grooves apart in the axial dimension. This dimensional distribution creates a stabilizing effect that prevents lens tilt while maintaining secure axial positioning
2Reliability
If lock nuts or lock rings are used to secure the lens, then the lens can be prevented from shifting, but the securing components are very small and unpleasant to set
Solution Approach 1:
The complex mechanical securing system (lock nuts, lock rings, or clamping screws) is replaced with a simple elastic O ring sealing system. The O rings provide automatic securing through their elasticity when compressed between the lens and the tube fitting, eliminating the need for small, difficult-to-install fastening components
Solution Approach 2:
The O rings automatically secure the lens through their elastic properties when compressed during lens installation. The lens itself, when screwed into the tube fitting, compresses the O rings which then exert a securing force back on the lens, creating a self-securing mechanism that does not require separate fastening operations
3Reliability
If a clamping screw is used to secure the lens, then the lens can be fixed in place, but the lens thread can be damaged and focus can shift during screwing-down
Solution Approach 1:
The clamping screw mechanism is replaced with an O ring-based securing system. The O rings, when compressed between the lens and tube fitting, provide sufficient securing force without requiring high clamping loads that would damage the lens thread or alter the focus position
Solution Approach 2:
The securing mechanism changes from a high-force mechanical clamping system to a moderate elastic compression system. The O rings exert distributed compressive forces that are sufficient for securing but low enough to prevent thread damage and focus shift, changing the force parameter from high to moderate
4Reliability
If adhesives are used to bond the lens, then the lens can be fixed securely, but further focus setting is no longer possible
Solution Approach 1:
The static adhesive bonding system is replaced with a dynamic, adjustable O ring compression system. The lens can be screwed in and out to adjust focus, and the O rings continuously provide securing force throughout the adjustment range, maintaining both fixity and adjustability simultaneously
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
The design ensures stable, moisture-tight lens fixation without tilt, enabling reliable use of conventional lenses and reducing costs by allowing secure, adjustable focus without mechanical clearance.
Implementation Method 1
an elastic O ring in the circumferential groove
Implementation Method 2
securely fixes the lens by frictional engagement
Implementation Method 3
watertight seal arrangement
Data Source
AI summary
The invention relates to a camera (1) with a camera housing (2) which has a lens receptacle with a tube fitting (3) and an internal thread (4) on the tube fitting (3). The tube fitting (3) comprises a first circumferential groove (5a) running around the inner circumference of the tube fitting (3), with an elastic O ring (7a) in the circumferential groove (5a). The tube fitting (3) has, on the inner circumference of the tube fitting (3), at least two circumferential grooves (5b) which are spaced apart from the first circumferential groove (5a) on a common optical axis (OA) in the direction of extent of the tube fitting (3), and comprises an elastic O ring (7b) in the second circumferential groove (5b).