Bayonet Mount Terminal Layout for Reliable Accessory Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing number of terminals in image capturing apparatuses and accessories, such as those using a bayonet coupling mechanism, leads to wear and tear, resulting in decreased insulation resistance, potential short circuits, and increased contact resistance, thereby reducing the reliability of electrical connections.
Innovation Solution
The image capturing apparatus features a bayonet coupling mechanism with a terminal holder that has a height level difference in the center-axis direction, allowing terminals to be held on multiple stages. This configuration ensures that terminals are connected at different heights, reducing wear and tear and maintaining electrical connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of terminals is increased to enhance functionality and data transmission capacity, then communication capability is improved, but terminal wear and reliability deteriorate due to frequent mounting and dismounting operations
Solution Approach 1:
The terminal holder is divided into multiple stages (first stage and second stage) with different height levels. Terminals are segmented and assigned to different stages based on their function, with detection terminals on the first stage and power/communication terminals on the second stage. This segmentation reduces wear on individual terminals while maintaining overall system functionality.
2Ease of operation
If a bayonet coupling mechanism is used to enable quick mounting and dismounting, then ease of operation is improved, but terminal wear increases leading to decreased insulation resistance and contact reliability
Solution Approach 1:
The terminal holder is pre-configured with multiple stages at different height levels before mounting operations begin. Detection terminals are positioned on the first stage to establish mounting detection before power and communication terminals on the second stage engage, preventing erroneous operations due to incomplete connection.
Solution Approach 2:
The terminal holder introduces a vertical dimension (height level difference) to the terminal arrangement. By stacking terminals on multiple stages along the center-axis direction, the patent reduces lateral wear from bayonet coupling while maintaining electrical connection functionality.
3Device complexity
If terminals are arranged on a single plane for simplicity, then device complexity is reduced, but mounting detection accuracy deteriorates due to simultaneous contact of all terminals
Solution Approach 1:
Terminals are segmented into different functional groups positioned on separate stages. Detection terminals are isolated on the first stage while power and communication terminals are placed on the second stage, enabling sequential contact during mounting to improve detection accuracy.
Solution Approach 2:
The multi-stage terminal holder structure acts as an intermediary mechanism that controls the sequence of terminal contact during mounting. The height level difference creates a mechanical intermediary that ensures detection terminals engage before other terminals, providing accurate mounting status detection.
Data Source
AI summary
An image capturing apparatus on which an accessory including a first mount is mountable includes a second mount. The second mount is configured to allow bayonet coupling to the first mount of the accessory. The second mount includes a plurality of terminals disposed in a circumferential direction, and a terminal holder configured to hold the plurality of terminals. Each of the plurality of terminals is electrically connectable to a terminal of the accessory. The terminal holder has a height level difference in a center-axis direction of the second mount. The plurality of terminals include a first terminal configured to be used to detect mounting of the accessory on the image capturing apparatus. The first terminal is disposed further in a mount direction of the accessory than the other terminals among the plurality of terminals on a first stage of the terminal holder.