Lens Moving Apparatus Damper Vibration Control
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Solution Overview
Problem
Conventional subminiature digital cameras experience resonance issues due to vibration of the bobbin in the optical axis direction during auto-focusing, leading to potential damage and inefficiency in lens movement.
Innovation Solution
A lens moving apparatus is designed with a damper system that attenuates optical axis directional vibration by using UV-curable resin dampers and damping connectors between the bobbin and housing, effectively reducing resonance and enhancing attachment stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bobbin is moved in the optical axis direction during auto-focusing, then the focal distance can be adjusted, but vibration and resonance occur causing potential damage and inefficiency
Solution Approach 1:
A damper is provided between the bobbin and the housing to cushion vibrations before they can cause resonance. The damper is positioned to directly attenuate optical axis directional vibrations of the bobbin during auto-focusing movement, preventing harmful vibrations from propagating and causing resonance between the bobbin and housing.
Solution Approach 2:
The damper serves as an intermediary element between the movable bobbin and the stationary housing. This intermediary component absorbs and dissipates vibrational energy, mediating the interaction between the moving and stationary parts to prevent direct transmission of harmful vibrations that would cause resonance.
2Productivity
If the bobbin moves during auto-focusing, then image focus can be adjusted, but vibration may cause damage to the apparatus
Solution Approach 1:
The damper provides beforehand cushioning by being pre-installed between the bobbin and housing to cushion vibrations before they can cause damage. This protective measure is in place during auto-focusing operations to prevent vibration-induced damage while maintaining focusing efficiency.
Solution Approach 2:
The damper converts the harmful vibrational energy into beneficial damping effects. By providing a controlled damping mechanism, the harmful vibrations that would cause damage are transformed into a beneficial force that stabilizes the system and protects the apparatus during auto-focusing operations.
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 effectively prevents resonance and damage by uniformly absorbing vibrations, ensuring precise and efficient lens movement during auto-focusing, thereby improving the reliability and durability of the lens moving apparatus.
Implementation Method 1
a damper which attenuates optical axis directional vibration of the bobbin
Implementation Method 2
UV-curable resin dampers
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Embodiments provide a lens moving apparatus including a housing supporting a driving magnet and having an opening, a bobbin provided at an outer circumferential surface thereof with a coil located inside the driving magnet, the bobbin being moved in a first direction parallel to an optical axis within the housing via electromagnetic interaction between the driving magnet and the coil, and a damper located between the housing and the bobbin.