Lens Guide Mechanism With Fluororesin Layers for Low Friction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high friction coefficient between the guide projection and guide groove in existing lens driving mechanisms leads to operational inefficiencies and potential mechanical issues.
Innovation Solution
Incorporating a resin composition of liquid crystal polymer mixed with fluororesin in the guide mechanism components, with a fluororesin layer on the sliding portions, to maintain a low friction coefficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a guide mechanism with guide projection and guide groove is used to guide lens movement, then the lens can be moved along a specific path, but the friction coefficient between the guide projection and guide groove becomes high
Solution Approach 1:
A fluororesin layer is introduced as an intermediary substance between the guide projection and guide groove sliding surfaces. This fluororesin layer acts as a mediator that reduces direct contact friction between the mating surfaces, enabling smooth lens movement while maintaining low friction coefficients even after repeated operations.
Solution Approach 2:
The guide mechanism components are constructed using composite materials: the guide projection and guide groove are made from resin compositions containing liquid crystal polymer mixed with fluororesin. This composite material structure combines the self-lubricating properties of fluororesin with the structural integrity of liquid crystal polymer, achieving both low friction and mechanical strength.
2Duration of action of moving object
If repeated use occurs, then the fluororesin layer may become thin and direct contact occurs between members, but high friction coefficient should not occur
Solution Approach 1:
The resin composition containing liquid crystal polymer and fluororesin provides self-lubricating properties. When the fluororesin layer becomes thin through repeated use, the fluororesin embedded in the resin composition continuously migrates to the surface, automatically replenishing the lubricating layer without external intervention. This self-service mechanism ensures the friction coefficient remains low throughout the entire service life.
Solution Approach 2:
The material composition parameters are optimized by mixing liquid crystal polymer with fluororesin in specific proportions. This parameter change in material composition creates a resin that dynamically adjusts its surface properties during operation, maintaining low friction characteristics even as the fluororesin layer thickness changes with repeated use.
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 ensures smooth and reliable operation of the lens driving device by preventing high friction, even with repeated use, thereby reducing mechanical wear and maintaining precision.
Implementation Method 1
A fluororesin layer is provided to a sliding portion of at least one out of the guide projection or the guide groove... A low friction coefficient is accordingly maintained by the fluororesin layer
Implementation Method 2
At least one portion... is configured from a resin composition resulting from mixing a liquid crystal polymer together with a fluororesin... the fluororesin of the member configuring the sliding portion would appear at the surface of the sliding portion
Data Source
AI summary
A lens driving device, a camera device, and an electronic apparatus are provided in which variation is not liable to occur in a friction coefficient of a guide mechanism. A lens driving device 12 includes a guide mechanism 38 configured to guide movement of a lens. The guide mechanism 38 includes a first member formed with guide projections 44, 48 and a second member conned with guide grooves 46, 50 in which the guide projections slide. At least one out of the first member or the second member is configured from a resin composition resulting from mixing a liquid crystal polymer together with a fluororesin. A fluororesin layer is provided to at least one surface of the guide projections or the guide grooves formed to at least the first member or the second member configured from the resin composition.