Camera Mount Terminal Zoning for Stable Lens Communication
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Solution Overview
Problem
Existing camera systems lack a stable configuration for ensuring consistent contact between terminal pins on the camera and interchangeable lens assemblies, leading to unstable communication between the camera and lens.
Innovation Solution
The accessory and image pickup apparatus are designed with a mount portion featuring second bayonet claw portions and terminals positioned differently, ensuring all communication terminals pass through a predetermined bayonet claw portion when viewed in the central axis direction, enhancing stable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terminal surfaces are positioned within the angle range of bayonet claw portions for type determination, then type identification stability is improved, but communication terminal contact stability deteriorates
Solution Approach 1:
The patent divides the terminal arrangement into two distinct groups: type determination terminals positioned within the bayonet claw angle range for accurate lens identification, and communication terminals positioned outside this range for stable contact. This segmentation allows each terminal group to fulfill its specific function without interference from the other, resolving the contradiction between type identification stability and communication contact stability.
Solution Approach 2:
Different regions of the terminal surface are assigned different functional qualities: the region within the bayonet claw angle range is optimized for type determination with specific terminal placements, while the region outside this range is optimized for communication terminals. This local differentiation ensures that each area serves its intended purpose effectively, maintaining both type identification accuracy and communication reliability.
2Measurement precision
If all terminals are positioned within the bayonet claw angle range, then type determination is improved, but communication stability deteriorates
Solution Approach 1:
The patent segments the terminal positioning strategy by creating two distinct zones: one within the bayonet claw angle range dedicated to type determination terminals, and another zone outside this range reserved for communication terminals. This spatial segmentation ensures that communication terminals are not affected by the angular positioning constraints that are necessary for accurate type determination.
Solution Approach 2:
The patent applies different positioning qualities to different terminal types based on their functional requirements. Type determination terminals are positioned with specific angular relationships to bayonet claws for accurate lens identification, while communication terminals are positioned in regions optimized for stable electrical contact, regardless of angular constraints.
Data Source
AI summary
An accessory attachable to and detachable from an image pickup apparatus includes a second mount portion including a plurality of second bayonet claw portions capable of engaging with a plurality of first bayonet claw portions, a plurality of second terminals capable of contacting with a plurality of first terminals, an accessory body, and a mount fixing member for fixing the second mount portion to the accessory body. The plurality of second terminals is provided at positions different from positions of the plurality of second bayonet claw portions, and all of multiple second terminals, among the plurality of second terminals, used in communication between the image pickup apparatus and the accessory are provided at predetermined positions.