Camera Module Carrier Structure for Low-Friction Lens Movement
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Solution Overview
Problem
Camera modules in mobile devices face issues with foreign object generation due to frictional contact between moving components, particularly when using ball members for lens movement, which can be exacerbated by external impacts.
Innovation Solution
A camera module design incorporating a housing and carrier with strategically positioned protrusions and retracting portions, along with ball members, to reduce friction and minimize foreign object generation while maintaining autofocus and optical image stabilization functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If lenses are moved in various directions to implement autofocus and optical image stabilization, then the camera module achieves focus adjustment and image stabilization functions, but foreign objects are generated due to frictional contact between members
Solution Approach 1:
A movement reduction portion is introduced as an intermediary element between the lens barrel and the housing. This portion includes a protrusion on the lens barrel that fits into a corresponding recess in the housing, creating a guided interface that reduces frictional contact and prevents foreign object generation while allowing necessary movements for autofocus and image stabilization.
2Ease of operation
If a ball member is used to guide lens movement, then the lens barrel moves smoothly, but movement occurs due to external impacts and frictional contact between adjacent members increases
Solution Approach 1:
The movement reduction portion serves as a protective intermediary that absorbs and distributes external impacts before they can affect the ball member and cause unwanted movement. The protrusion-recess structure provides mechanical protection while maintaining smooth operation through the ball member.
Solution Approach 2:
The movement reduction portion is designed beforehand to cushion and mitigate the effects of external impacts. The protrusion fitting into the recess creates a mechanically protected interface that prevents direct transmission of impact forces to the ball member, thereby maintaining reliability.
3Productivity
If members are moved to achieve autofocus and image stabilization, then the camera module performs its functions, but frictional contact between members increases leading to foreign object generation
Solution Approach 1:
The movement reduction portion is positioned at critical interfaces where frictional contact occurs during autofocus and image stabilization operations. The protrusion-recess design creates a controlled interaction that reduces unwanted friction while allowing necessary movements, thereby preventing foreign object generation without compromising camera functionality.
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 effectively reduces foreign object generation while preserving the functionality of autofocus and optical image stabilization, ensuring smooth lens movement and improved reliability.
Implementation Method 1
a ball member disposed between the carrier and the housing
Implementation Method 2
The housing and the carrier may include a driving coil and a driving magnet, respectively, and the carrier may be supported on the housing by attractive force of a pulling yoke disposed in the housing and the driving magnet
Implementation Method 3
On opposite surfaces of the housing and the carrier facing each other in a direction perpendicular to the optical axis direction, a movement reduction portion having a corresponding shape is selectively disposed on the housing and the carrier
Data Source
AI summary
A camera module includes a housing, and a carrier supported on the housing with a ball member therebetween, and movable in an optical axis direction. On opposite surfaces of the housing and the carrier facing each other in a direction perpendicular to the optical axis direction, a movement reduction portion having a corresponding shape is selectively disposed on the housing and the carrier.