Camera Lens Moving Structure With Line-Contact Anti-Shake Support
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Solution Overview
Problem
Conventional camera anti-shake mechanisms using a ball-type design with point-contact between the ball and the groove lead to excessive stress, causing friction issues such as debris and contamination, affecting image quality.
Innovation Solution
A camera structure with a moving element featuring cone-shaped surfaces and inclined planes that allow line contact between moving portions, reducing friction and stress concentration, and incorporating magnetic interactions for displacement of the imaging lens for Auto Focus and Optical Image Stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ball-type anti-shake design with point-contact between the ball and V-shaped groove is used, then the anti-shake mechanism can be implemented, but excessive stress and friction occur leading to debris and contamination
Solution Approach 1:
The patent replaces the spherical ball with a cylindrical moving element that has tapered surfaces. This cylindrical shape with tapered ends allows for line contact rather than point contact with the inclined planes, distributing stress along the contact line and eliminating the excessive stress concentration that occurs with point-contact ball designs.
Solution Approach 2:
The patent changes the contact geometry parameters from point-contact (ball in V-groove) to line-contact (cylinder on inclined planes). The tapered surfaces of the cylindrical moving element create a line contact interface with the inclined planes of the first and second moving portions, fundamentally altering the stress distribution and friction characteristics of the anti-shake mechanism.
2Ease of operation
If point-contact method is used between the ball and groove, then the anti-shake function is achieved, but severe friction and stress concentration occur over time
Solution Approach 1:
The cylindrical moving element with tapered surfaces replaces the spherical ball, transforming the contact geometry from point-contact to line-contact. The inclined planes of the first and second moving portions contact the tapered surfaces along lines rather than at points, distributing mechanical stress and preventing contact surface failure.
Solution Approach 2:
The patent transitions from zero-dimensional point contact to one-dimensional line contact by changing the geometry of the moving element from spherical to cylindrical with tapered surfaces. This dimensional change in the contact interface spreads the load across a longer contact line, reducing stress concentration and preventing friction-induced damage.
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 solution reduces friction-related damage and enhances the stability of the imaging lens, improving the quality of captured images by minimizing stress concentration and ensuring smooth movement.
Implementation Method 1
a magnetic assembly including a magnet and a coil corresponding to the magnet, the coil generating a magnetic force interacting with the magnet to displace the imaging lens along a first direction
Data Source
AI summary
A camera structure includes: a moving element is located between a first moving portion and a second moving portion. The moving element includes a body portion and two cone portions, wherein the cone portions are located at two ends of the body portion. The first moving portion has two first supporting portions. The two first supporting portions have two first supporting inclined planes. The second moving portion has two second supporting portions. The two second supporting portions have a second supporting inclined plane. The two first supporting inclined planes are in contact with the tapered surface on one side of the cone portion. The two second supporting inclined planes are in contact with the tapered surface on the other side of the cone portion. The moving element is configured to move along the first supporting inclined plane and second supporting inclined plane.