Camera Module Magnetic Blade Drive Without AF Interference
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Solution Overview
Problem
Existing camera modules face issues with multi-directional protrusions and interference between the blade driving mechanism and autofocus mechanism, leading to assembly difficulties and reliability concerns.
Innovation Solution
A camera module design featuring a cylinder with a driving coil group and driven magnetic member group that rotates a shading blade independently of the autofocus mechanism, using magnetic forces to avoid interference and simplify the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a blade drive mechanism is used to control aperture size, then the aperture can be adjusted for different lighting conditions, but the mechanism creates multi-directional protrusions that complicate assembly and increase device complexity
Solution Approach 1:
The patent merges the blade drive mechanism with the autofocus mechanism by integrating the blade drive components into the existing autofocus structure. The blade drive ring is combined with the autofocus lens group, eliminating separate multi-directional protrusions and reducing overall device complexity while maintaining aperture adjustment functionality.
Solution Approach 2:
The blade drive mechanism is nested within the autofocus mechanism structure. The blade drive ring is positioned inside the autofocus lens group, with the shading blade rotating within the existing autofocus housing, thereby reducing the number of external protrusions and simplifying the overall device geometry.
2Device complexity
If the blade drive mechanism and autofocus mechanism are integrated, then device complexity is reduced, but interference between the two mechanisms occurs during focusing and aperture adjustment
Solution Approach 1:
The patent segments the blade drive mechanism from the autofocus mechanism functionally, even though they share a common housing. The shading blade is positioned to rotate independently within the blade drive ring, separate from the autofocus lens group movement, preventing mechanical interference while maintaining structural integration.
Solution Approach 2:
The patent introduces an intermediary spacing and positioning structure between the blade drive components and autofocus components. The blade drive ring is positioned with appropriate clearance from the autofocus lens group, and the shading blade rotates within a dedicated space that avoids interference with the autofocus mechanism during either operation.
3Ease of operation
If the shading blade is driven to block or expose the lens, then light control is achieved, but the driving mechanism requires precise weight distribution and synchronization that increases design difficulty
Solution Approach 1:
The patent replaces complex mechanical weight distribution and synchronization mechanisms with a magnetic driving system. The driving coil group generates magnetic fields that directly act on the shading blade through the blade drive ring, eliminating the need for precise mechanical weight balancing and synchronization while achieving smooth and reliable light control.
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 achieves a more concise structure with fewer components, reducing assembly difficulty and manufacturing costs while ensuring smooth operation of both mechanisms without interference.
Implementation Method 1
a driving coil group fixed on an inner wall of the cylinder, a blade support member coaxially arranged with the lens and fixed on an object side of the lens, a blade driven ring coaxially arranged with the lens and rotatably engaged with an object side of the blade support member, and a driven magnetic member group fixed to the blade driven ring and arranged opposite to the driving coil group
Data Source
AI summary
The embodiments of the present application relate to the technical field of camera devices, and disclose a camera module that uses the magnetic force between the driving coil group and the driven magnetic member group to achieve non-contact driving of the shading blade by the blade driving mechanism, so that the blade driving mechanism and the autofocus mechanism operate independently of each other without interference. Moreover, since the cylinder, the lens, the driving coil group, and the blade support member are all assembled along the optical axis, which avoids multi-directional protrusions of the camera module. The camera module provided according to the present application has a more concise structure and uses fewer components, which can reduce the assembly difficulty and manufacturing cost of the camera module. The present application also discloses an electronic device including a device body and a camera module arranged on the device body.