Camera Module Position-Limiting Structure for Precise Zoom Travel
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Solution Overview
Problem
Camera modules lack a structure to accurately limit the initial and final positions of the zoom lens during focal length adjustments, leading to imprecise zoom settings.
Innovation Solution
Incorporation of a position-limiting block and plate within the camera module to precisely control the movement range of the zoom lens, using a position-limiting plate fixed to the lens assembly and constrained by parallel long sides of the position-limiting block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a driving device is used to drive the zoom lens position, then the zoom function is achieved with different field of view widths, but the initial and final positions of the zoom lens cannot be accurately located without a limiting structure
Solution Approach 1:
The positioning function is segmented into two parts: the driving device moves the lens, and the position-limiting structure (block and plate) defines the boundaries. This segmentation allows the driving device to focus solely on movement while the limiting structure handles positioning accuracy, resolving the contradiction between positioning precision and device complexity.
Solution Approach 2:
The position-limiting plate acts as an intermediary between the zoom lens and the position-limiting block. It transfers the positioning constraint from the block to the lens assembly, enabling accurate location of initial and final positions without requiring the driving device to have inherent positioning capabilities, thus improving measurement precision without significantly increasing complexity.
2Manufacturing precision
If the zoom lens is allowed to move freely during driving, then the driving device has greater flexibility in operation, but the adjustment of focal lengths at both ends becomes imprecise
Solution Approach 1:
The position-limiting block and plate are pre-installed to define the movement boundaries before the driving operation begins. This preliminary action establishes the precise adjustment range for focal lengths, ensuring that the driving device operates within predetermined limits and achieves precise focal length adjustment at both ends while maintaining ease of operation through simple mechanical constraints.
Data Source
AI summary
A camera module includes a first camera device. The first camera device includes a position-limiting block, a position-limiting plate, and a first lens assembly. The first camera device is provided with a first accommodation space. The position-limiting block is fixed on an inner wall of the first accommodation space. The position-limiting block includes a first long side and a second long side. The position-limiting plate is fixed on an outer side surface of the first lens assembly. The first lens assembly can drive the position-limiting plate to move along a first direction. The first long side and the second long side can limit a movement range of the position-limiting plate.