Adjustable Medium Holding Unit for Offset Discs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Medium processing apparatuses face challenges in holding plate-like media such as CDs or DVDs due to positional offsets and adhesive forces between stacked discs, leading to inadequate balancing and holding failures.
Innovation Solution
A medium holding unit with three interlockable and independently movable pressing members, each with a pivoting mechanism and urging members, that can press the inner peripheral of the medium's center hole to ensure balanced holding, even when the medium's center position is offset, and a medium guide with a conical shape to align and stabilize the disc.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the holding portion uses fixed claws to hold the medium, then the structure is simple, but the holding balance deteriorates when the medium center is offset
Solution Approach 1:
The holding portion employs three pressing members that can independently move radially toward the inner peripheral surface of the medium's hole. This dynamic configuration allows each pressing member to adapt to offset positions, maintaining reliable holding balance even when the medium center does not align with the pickup center, thereby resolving the contradiction between structural simplicity and holding reliability.
2Device complexity
If the holding force is applied centrally, then the holding mechanism is simple, but the holding effectiveness deteriorates when adjacent mediums are adhered
Solution Approach 1:
The holding mechanism divides the holding force into three separate pressing members that can independently apply pressure at different radial positions on the inner peripheral surface of the medium's hole. This segmentation allows the holding portion to effectively lift the uppermost medium even when adjacent mediums are adhered, as the distributed pressing members can overcome adhesive forces more effectively than a single centralized holding point.
3Adaptability or versatility
If the pressing members are moved independently, then the holding adaptability improves for offset positions, but the mechanism complexity increases
Solution Approach 1:
The three pressing members are combined with a common driving mechanism that rotates the holding portion. This merging allows the pressing members to be driven simultaneously by a single rotation motion, reducing the need for three separate drive mechanisms. The pressing members move independently in the radial direction while sharing a common rotational drive, thus achieving position adaptability without excessive mechanism complexity.
Data Source
AI summary
A holding portion includes at least three pressing members which are operable to press an inner peripheral of a hole formed on the medium. The pressing members are movable between first positions where the pressing members do not come in contact with the inner peripheral and second positions where the pressing members come in contact with and press the inner peripheral. Each of the pressing members is adapted to interlockingly move with each other when moving toward the first positions and to press the inner peripheral independently from the other members when positioning the second positions.