Camera Lens Mount Terminal Arrangement for Noise Reduction
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Solution Overview
Problem
Existing camera systems face challenges in efficiently and reliably attaching and detaching interchangeable lenses, leading to potential misalignment, power supply issues, and communication errors due to noise and wear on terminal contacts.
Innovation Solution
A camera system design featuring a bayonet-type lens mount mechanism with a specific terminal arrangement that minimizes noise interference and wear, including a unique positioning of terminals to ensure stable contact and communication during attachment and removal, utilizing a microcomputer-controlled communication system for command data and hot-line communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals are arranged in a conventional manner on the lens mount, then the attachment mechanism is simple, but noise interference and wear on terminal contacts increase during attachment and detachment
Solution Approach 1:
The patent applies asymmetry by arranging terminals at specific asymmetric positions on the lens mount. The first terminal is positioned at a first position while the second terminal is positioned at a second position that is asymmetrically offset from the first position in the circumferential direction. This asymmetric arrangement optimizes the electrical contact paths to minimize noise interference and wear during attachment and detachment operations, thereby improving communication stability without requiring complex additional components.
2Adaptability or versatility
If the lens is frequently attached and detached, then the adaptability of the camera system is improved, but wear on terminal contacts increases leading to communication errors
Solution Approach 1:
The patent implements preliminary action by pre-positioning the terminals at optimized locations before attachment occurs. The first terminal is arranged at a first position and the second terminal at a second position on the lens mount, such that when the lens is attached to the camera body, the terminals make contact at optimal points that minimize wear and noise. This preliminary optimization of terminal positions ensures reliable communication even after frequent attachment and detachment operations.
3Productivity
If terminal contacts are made during attachment, then power and communication are established, but noise and wear occur during the attachment process
Solution Approach 1:
The patent applies local quality by optimizing the specific positions where terminal contacts occur during attachment. The first terminal is positioned at a first location and the second terminal at a second location on the lens mount, creating localized optimal contact zones. This ensures that when the lens attaches to the camera body, the terminals make contact at precisely positioned points that minimize noise generation and wear, while still enabling rapid establishment of power and communication connections.
Data Source
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AI summary
An accessory (3) for a camera body (2) including a plurality of camera-side terminals, a camera-side protruding portion (29a-29d), and an elastic member (41a-41d), the accessory (3) includes: a first terminal (LDET(L)) that changes a voltage at the first camera-side terminal (LDET(B)) by contacting with a first camera-side terminal (LDET(B)); an eighth terminal (CLK(L)) to which a first clock signal is input by contacting with a first camera-side clock terminal (CLK(B)); a tenth terminal (HCLK(L)) that outputs a second clock signal (HCLK(L)) by contacting with a second camera-side clock terminal (HCLK(B)); and an accessary-side protruding portion (39a-39d) that is to be pressed toward the camera body side by the elastic member (41a-41d), wherein a distance between the eighth terminal (CLK(L)) and the accessary-side protruding portion (39b) and a distance between the tenth terminal ((HCLK(L)) and the accessary-side protruding portion (39b) are shorter than a distance between the first terminal (LDET(L)) and the accessary-side protruding portion (39b).