Accessory Contact Layout for Stable Ground and Low-Noise Signals
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Solution Overview
Problem
Existing electronic apparatus accessories lack a flexible contact arrangement that accommodates different accessory types, leading to potential malfunctions and inefficiencies in power and communication due to noise interference and unstable ground connections.
Innovation Solution
The electronic apparatus and accessory feature a contact arrangement with varying distances between functional signal contacts and reference potential contacts, including attachment detection contacts positioned strategically to minimize noise interference and ensure stable ground connections, enabling efficient power supply and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contacts are arranged with fixed functions and equal distances, then the structure is simple and easy to manufacture, but noise interference increases and ground connections become unstable
Solution Approach 1:
The patent applies local quality by making the distance between adjacent contacts variable rather than uniform. Specifically, the distance between the attachment detection contact and its adjacent functional signal contact is set to be smaller than the distance between other adjacent contacts. This localized variation in spacing provides enhanced ground connection stability and noise reduction at critical interfaces without requiring complete redesign of the entire contact arrangement.
Solution Approach 2:
The patent implements asymmetry by creating an uneven distribution of contact distances. The contact arrangement features asymmetric spacing where certain adjacent contacts have smaller distances while others have larger distances. This asymmetric configuration optimizes the electrical characteristics and ground connection stability for specific signal paths without maintaining uniform symmetry across all contacts, thereby improving reliability while keeping the overall structure manageable.
2Object-affected harmful factors
If functional signal contacts are placed close to reference potential contacts, then noise interference is reduced, but the risk of short circuit and malfunction increases
Solution Approach 1:
The patent applies parameter changes by varying the distance parameter between contacts based on their specific functions and positions. Rather than using a fixed distance for all contacts, the patent optimizes the distance parameter locally - making it smaller for attachment detection contacts to reduce noise, while maintaining larger distances for other contacts to prevent short circuits. This dynamic parameter adjustment resolves the contradiction between noise reduction and short circuit prevention.
3Object-affected harmful factors
If contact distances are varied to optimize signal quality, then noise reduction is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by implementing varied contact distances only where necessary for optimal signal quality, rather than requiring precise control of all contact spacings. The attachment detection contact has a specifically optimized smaller distance to its adjacent functional signal contact for noise reduction, while other contact distances can be less critical. This localized optimization reduces the overall manufacturing precision burden compared to requiring uniform precision across all contacts.
Data Source
AI summary
An electronic apparatus to which an accessory is to be detachably attached includes a plurality of contacts electrically connectable to the accessory and arranged in a row. The contacts include a plurality of functional signal contacts to which signals having functions that are different functions according to a type of the accessory are connected, reference potential contacts, to each of which a reference potential is connected, and contacts that are used to supply power to the accessory or to communicate with the accessory. The functional signal contacts include a first functional signal contact and a second functional signal contact. A distance from the first functional signal contact to a reference potential contact closest to the first functional signal contact and a distance from the second functional signal contact to a reference potential contact closest to the second functional signal contact are different from each other.