Opposing Platter Turntable for Vibration Isolation
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Solution Overview
Problem
Existing turntable designs face challenges in maintaining consistent rotational speed, leading to audible degradation due to micro speed variations caused by external mechanical and electrical influences, which are not adequately reduced by conventional drive systems.
Innovation Solution
A vibration-reduced turntable design featuring a suspension system that includes a first and second platter rotating in opposite directions, supported by a frame with a drive unit and biasing device, utilizing drivebelts and pulleys to synchronize and stabilize platter rotation, thereby reducing external vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional drive system is used to rotate the platter, then the turntable can operate, but micro speed variations occur causing audible degradation
Solution Approach 1:
The patent applies counter-vibration by rotating a second platter in the opposite direction to generate counteracting vibrations that cancel out the micro speed variations produced by the first platter's drive system, thereby eliminating audible degradation
Solution Approach 2:
The patent converts the harmful micro speed variations into beneficial counter-vibrations by using a second platter driven in reverse, transforming the problematic vibrations into a force that cancels out the degradation and improves sound quality
2Device complexity
If the turntable is directly coupled to the motor, then the structure is simple, but external mechanical and electrical influences are not adequately reduced
Solution Approach 1:
The patent introduces a second platter as an intermediary element between the motor and the first platter, which acts as a mediator to cancel out external mechanical and electrical influences while maintaining the direct coupling structure
3Device complexity
If a single platter rotates at constant speed, then the drive mechanism is simple, but vibrations affect sound reproduction quality
Solution Approach 1:
The patent uses mechanical vibration cancellation by rotating a second platter in the opposite direction to generate counter-vibrations that cancel out the vibrations affecting the first platter and disc, thereby improving sound reproduction quality without complicating the basic platter configuration
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design significantly minimizes audible vibrations, resulting in higher quality sound reproduction by effectively isolating the turntable from external mechanical and electrical influences, enhancing rotational speed stability.
Implementation Method 1
a suspension system supporting the frame for reducing vibrations on the disc received by the first platter and for reducing vibrations of the frame
Implementation Method 2
the first platter for rotation in a first direction; a second platter mounted on one of: the frame and the first platter, the second platter for rotation in a second direction
Data Source
AI summary
The present document describes a vibration-reduced turntable adapted to receive a disc, the vibration-reduced turntable comprising: a frame; a first platter mounted on the frame and for receiving the disc, the first platter for rotation in a first direction; a second platter mounted on one of: the frame and the first platter, the second platter for rotation in a second direction; and a suspension system supporting the frame for reducing vibrations on the disc received by the first platter and for reducing vibrations of the frame.