Interchangeable Lens Camera Circuit Board Placement
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Solution Overview
Problem
Interchangeable lens type cameras face challenges in reducing size due to the fixed flange focal distance between the body mount and imaging device, limiting the degree of freedom in component arrangement and making it difficult to achieve a compact structure.
Innovation Solution
A compact interchangeable lens type camera design is achieved by placing a circuit board between the body mount and the imaging device, with an opening in the circuit board allowing light to pass through, and eliminating the mirror box device to shorten the flange focal distance and reduce camera size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mirror box device is provided to enable interchangeable lens mounting, then the camera can achieve standard lens interchangeability, but the camera size increases and compactness is reduced
Solution Approach 1:
The patent removes the mirror box device from the camera body, extracting the component that traditionally enabled lens interchangeability but increased size. Instead, a simplified body mount with electrical contacts is provided, allowing lens attachment while eliminating the bulky mirror mechanism, thus achieving compactness without completely sacrificing lens interchangeability
2Adaptability or versatility
If the flange focal distance is maintained at standard length for lens compatibility, then interchangeable lenses can be mounted, but the degree of freedom in component arrangement is reduced and camera size cannot be minimized
Solution Approach 1:
The patent changes the flange focal distance parameter from the standard length to a shortened length optimized for the specific imaging device. This parameter change allows the circuit board to be positioned between the body mount and imaging device, improving component arrangement flexibility and reducing overall camera size while maintaining lens compatibility through electrical contact design
3Volume of moving object
If the circuit board is placed between the body mount and imaging device, then space is optimized and camera size is reduced, but light transmission path is blocked
Solution Approach 1:
The circuit board is segmented with a light transmission opening that divides the board into regions while maintaining electrical connectivity. This segmentation allows the circuit board to occupy space between the body mount and imaging device for compactness, while the opening ensures unobstructed light transmission to the imaging device
4Object-generated harmful factors
If a focal plane shutter is eliminated to reduce noise, then noise during shooting is reduced, but exposure control capability is affected
Solution Approach 1:
The patent replaces the mechanical focal plane shutter system with an electronic shutter control mechanism. The circuit board includes electronic components that control exposure timing and duration through electrical signals to the imaging device, eliminating mechanical shutter movements that generate noise while maintaining precise exposure control capability through electronic timing
Data Source
AI summary
An imaging apparatus includes a body mount to which an interchangeable lens is attachable; an imaging device; and a circuit board. The circuit board is arranged between the body mount and the imaging device, and an opening or a cut part through which light from the interchangeable lens toward the imaging device passes is formed in the circuit board.