Suspension Wire Deformation Buffer for Impact Resistance
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Solution Overview
Problem
Existing suspension wires in image photographing devices are prone to permanent deformation or fracture due to external impacts, such as dropping, which compromises hand vibration compensation and image quality.
Innovation Solution
A suspension wire with a deformation buffer is designed to absorb impact forces, featuring a wire body with fixed ends to the optical unit and housing, and a deformation buffer with a varying cross-sectional ratio to prevent permanent deformation or fracture, maintaining the optical unit's movement performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a suspension wire is used to support the optical unit in a floated state, then friction between the optical unit and other components is eliminated, preventing noise and foreign material generation, but the suspension wire is prone to permanent deformation or fracture due to external impact forces
Solution Approach 1:
A buffer structure is integrated into the suspension wire to absorb and mitigate external impact forces before they can cause permanent deformation or fracture. The buffer acts as a pre-positioned cushioning element that deforms elastically under impact, protecting the critical suspension wire from damage while maintaining the floated support configuration that prevents friction-related noise.
2Strength
If the suspension wire is made thicker to increase strength against impact, then impact resistance improves, but the moving performance of the optical unit deteriorates due to increased stiffness
Solution Approach 1:
The suspension wire is segmented into functionally distinct sections: a thin-wire section that provides smooth movement and low stiffness for ease of operation, and a buffer section with increased cross-sectional area that provides impact resistance. This segmentation allows each portion to optimize its performance for its specific function without compromising the other.
Solution Approach 2:
Different sections of the suspension wire have different local qualities - the buffer section has a larger cross-sectional area for strength and impact absorption, while the main suspension sections maintain a smaller cross-sectional area for smooth movement. This local differentiation of structural properties resolves the contradiction between overall strength and movement smoothness.
3Adaptability or versatility
If a two-axis guide is used to support the lens, then the lens can be moved in relative directions to compensate for hand vibration, but friction between the guide and lens occurs, causing noise and foreign material generation
Solution Approach 1:
The mechanical contact-based two-axis guide system is replaced with a suspension wire system that uses tension and elasticity to enable optical unit movement. This substitution eliminates direct mechanical contact and friction between moving parts, thereby preventing noise and foreign material generation while maintaining hand vibration compensation capability through electromagnetic actuation of the suspended optical unit.
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 deformation buffer effectively minimizes the risk of permanent deformation or fracture, enhancing the reliability and durability of hand vibration compensation and auto-focusing performance while maintaining the compact size of the image photographing device.
Implementation Method 1
a deformation buffer formed in the wire body to allow the wire body to receive impact force when external impact is applied to the wire body
Implementation Method 2
a suspension wire for compensating for hand vibration mounted between the optical unit and the housing so as to have a length thereof in an optical axis direction to float and support the optical unit within the housing
Data Source
AI summary
Disclosed herein are a suspension wire for compensating for hand vibration and an image photographing device having the same. The suspension wire for compensating for hand vibration, which is mounted between an optical unit and a housing so as to have a length thereof in an optical axis direction to float and support the optical unit within the housing, includes: a wire body having both ends thereof each fixed to the optical unit and the housing; and a deformation buffer formed in the wire body to allow the wire body to flexibly receive impact force when external impact is applied to the wire body, thereby preventing permanent deformation or fracture of the wire body.