Camera Accessory Mount Terminal Layout 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 two components.
Innovation Solution
An accessory with a mount portion featuring second bayonet claw portions and terminals positioned differently to ensure all communication terminals pass through a predetermined bayonet claw portion, enhancing stable contact and 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 separates the positioning function (handled by bayonet claw portions in the radial dimension) from the communication function (handled by terminals in the axial dimension). The terminal surfaces are positioned to extend in the axial direction rather than being constrained to the radial angle range, allowing communication contacts to be stabilized independently of type determination positioning.
Solution Approach 2:
The patent divides the terminal structure into type determination terminals and communication terminals. Type determination terminals are positioned within the bayonet claw angle range for stable type identification, while communication terminals are positioned to extend axially for stable communication contact. This segmentation allows each terminal group to optimize its positioning for its specific function.
2Reliability
If terminal surfaces are positioned to contact terminal pins for communication, then communication stability is improved, but type determination accuracy deteriorates
Solution Approach 1:
The patent uses different spatial dimensions for type determination and communication functions. Type determination relies on radial positioning within the bayonet claw angle range, while communication relies on axial extension of terminal surfaces. This dimensional separation allows both functions to achieve their respective accuracy and stability requirements simultaneously.
Solution Approach 2:
The patent segments terminals into type determination terminals and communication terminals with distinct positioning requirements. Type determination terminals are constrained to the bayonet claw angle range for accurate lens type identification, while communication terminals extend axially to ensure stable electrical contact for data and power transmission.
3Ease of operation
If all terminals are positioned at the same location for simplified mounting, then ease of operation is improved, but communication reliability deteriorates
Solution Approach 1:
The patent segments the terminal array into functionally distinct groups: type determination terminals positioned for lens type identification and communication terminals positioned for stable electrical contact. This segmentation maintains mounting simplicity through a unified bayonet interface while ensuring each terminal group achieves optimal positioning for its specific function.
Solution Approach 2:
The bayonet mount interface serves multiple functions simultaneously: mechanical connection, type determination through claw portion engagement, and communication through terminal contact. The patent optimizes each function's terminal positioning while maintaining the universal bayonet mounting mechanism for ease of operation.
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.