Camera Accessory Terminal Layout for Secure Lens Mount Communication
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Solution Overview
Problem
Existing camera accessories face challenges in being properly attached to the camera body, requiring improved mechanisms for secure and functional attachment.
Innovation Solution
A camera system with a bayonet-type lens mount mechanism and electrical connections between the camera body and interchangeable lens, including specific terminal arrangements and communication protocols for seamless data exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bayonet-type lens mount mechanism is used, then the attachment security and mechanical stability are improved, but the device complexity increases due to additional mounting components and alignment requirements
Solution Approach 1:
The patent combines the mechanical bayonet mount structure with electrical signal terminals into a single integrated accessory assembly. The signal terminals are embedded within the lens mount structure, so that mechanical attachment and electrical connection occur simultaneously in one operation, rather than requiring separate mechanical and electrical connection steps.
Solution Approach 2:
The accessory design integrates multiple functions into a single component: mechanical support, electrical signal transmission, and data communication. The lens mount serves both as the mechanical attachment structure and as the carrier for signal terminals, eliminating the need for separate electrical connection mechanisms.
2Productivity
If multiple signal terminals are arranged in a specific sequence, then the data communication efficiency and auto-focusing speed are improved, but the manufacturing precision requirements increase
Solution Approach 1:
The signal terminals are pre-arranged in a specific sequential order during accessory manufacturing, with the attachment detection terminal positioned first in the rotation direction, followed by other functional terminals. This preliminary arrangement ensures that upon attachment, the terminals engage in the correct sequence without requiring complex real-time alignment mechanisms.
Solution Approach 2:
Different signal terminals are assigned specific functional roles based on their position in the sequence: the attachment detection terminal is positioned to engage first for immediate status verification, while other terminals are positioned for subsequent data and power connections. This localized functional assignment optimizes communication efficiency without requiring all terminals to meet the same precision criteria.
3Ease of operation
If continuous state monitoring is implemented, then the camera functionality and control responsiveness are improved, but the energy consumption increases
Solution Approach 1:
The state monitoring system operates periodically rather than continuously, with the accessory-side state acquiring unit checking attachment status and other parameters at regular intervals. This periodic monitoring maintains system responsiveness and control capability while significantly reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The accessory unit autonomously monitors its own attachment state and communicates this information to the camera body, eliminating the need for the camera body to continuously query the accessory status. This self-service monitoring approach reduces the overall system energy consumption while maintaining real-time awareness of accessory attachment state.
Data Source
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AI summary
An accessory that can be attached to a camera body, the accessory comprising a ninth terminal from which a third data signal is output to the camera body; a tenth terminal from which a second clock signal is output to the camera body; and an eleventh terminal from which a second data signal is output to the camera body, wherein the tenth terminal is positioned between the ninth terminal and the eleventh terminal.