Disc Transfer Device Roller Guide Mechanism
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Solution Overview
Problem
Existing disc transfer devices face challenges in securely transferring discs without slipping, especially when the disc has a low friction coefficient, due to the limited distance between rollers and the small pickup angle, which can result in failed pickup and reduced transfer distance.
Innovation Solution
The disc transfer device employs a roller and a rubber guide member that increase the pickup angle and maintain contact with the disc, allowing for secure transfer by rotating around a rotation center axis in the disc's thickness direction, with the roller and rubber guide member working together to move the disc from the delivery position to the record/reproduction position without slipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the distance between rollers is limited, then the device structure remains compact, but the pickup angle becomes small causing failed pickup and reduced transfer distance
Solution Approach 1:
The patent introduces a guide member that contacts the disc in a direction substantially perpendicular to the roller's contact direction. This adds a dimensional element to the transfer mechanism, allowing the guide member to extend in the radial direction of the disc and provide additional contact points, thereby increasing the effective pickup angle and transfer distance without proportionally increasing device complexity
Solution Approach 2:
The guide member acts as an intermediary element between the rollers and the disc. It provides an additional contact interface that mediates the transfer process, ensuring stable contact with the disc's radial end face and preventing slipping during transfer, especially for discs with low friction coefficients
2Reliability
If the pickup angle is small, then the roller contact area is reduced, but this causes failed pickup and slipping on low friction coefficient discs
Solution Approach 1:
By introducing the guide member that contacts the disc perpendicular to the roller direction, the patent effectively increases the contact area in a different dimensional orientation. This multi-directional contact approach enhances pickup reliability without requiring a single large contact area, distributing the contact across multiple surfaces
Solution Approach 2:
The guide member is configured with a rubber outer circumferential surface that has a large friction coefficient, combining material properties to ensure reliable contact. This composite approach (guide member structure + high-friction rubber surface) compensates for low disc surface friction and prevents slipping during transfer
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
This solution ensures secure and reliable transfer of discs in the radial direction by maintaining a larger pickup angle and preventing slipping, allowing the disc to be accurately positioned for recording or reproduction while minimizing overlap with adjacent discs.
Implementation Method 1
a roller (20) whose outer circumferential surface is brought into contact with a radial end face (Da1) of the disc (D1)
Data Source
AI summary
A disc transfer device according to the present disclosure is a disc transfer device that transfers a disc in a first direction from a first position toward a third position via a second position, and includes a roller, a roller support mechanism, a first retaining member, a second retaining member, and a retaining member support mechanism. The roller rotates in a state of contact with a disc end face on one side in a second direction being orthogonal to the first direction, until the disc reaches the third position from the first position. The roller support mechanism supports the roller such that the roller is in contact with the transferred disc and is moveable in the first direction and the second direction. The first retaining member extends in the first direction, and is brought into contact with the disc end face on the other side in the second direction until the disc reaches at least the second position from the first position. The second retaining member is brought into contact with the disc end face on the other side in the second direction until the disc reaches the third position from the second position. The retaining member support mechanism supports the second retaining member such that the second retaining member is in contact with the transferred disc and is moveable in the first direction and the second direction.