Printer Medium Placement Seat Curved Surface Design
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Solution Overview
Problem
Conventional printers face issues where a roll medium fed backward can sag and become stuck or twisted, leading to folding or twisting during the printing and cutting process.
Innovation Solution
A printer design featuring a medium temporary placement support with a curved upstream end portion on its placement surface, which guides the medium backward and prevents it from being stuck or twisted, utilizing a shaft support and conveyor system that conveys the medium perpendicularly to the supply shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the medium is fed backward to the upstream side for cutting operation, then the cutting operation can be performed, but the medium sags and gets stuck by the placement section causing folding or twisting
Solution Approach 1:
The placement section is designed with a curved surface instead of a flat surface. The curved surface has a downward slope toward the upstream side, which guides the medium smoothly during backward feeding and prevents the medium from sagging, getting stuck, or twisting. This curvature resolves the contradiction by maintaining medium stability during the cutting operation.
2Device complexity
If a flat placement section is used, then the structure is simple, but the medium gets stuck and folded when fed backward
Solution Approach 1:
The placement section employs a curved surface with a downward slope toward the upstream side. This simple curved geometry prevents the medium from getting stuck or folded during backward conveyance while maintaining structural simplicity. The curvature naturally guides the medium flow without requiring complex mechanisms.
3Adaptability or versatility
If the medium is fed backward in large quantity, then the cutting length can be adjusted, but the medium hangs down and gets stuck by the placement section
Solution Approach 1:
The curved surface of the placement section maintains the medium in a proper shape during backward feeding. The downward slope toward the upstream side prevents the medium from hanging down or sagging, even when large quantities are fed back for extended cutting operations. This preserves medium shape stability while allowing cutting length adaptability.
Solution Approach 2:
The placement section's curved geometry changes the physical parameters of medium support during backward conveyance. By providing a sloped curved surface, the system alters how the medium interacts with the placement section, preventing sagging and maintaining shape stability during variable-length cutting operations.
Data Source
AI summary
A printer includes a medium supplier including a shaft support, to which a supply shaft of a roll medium is detachably attached, a medium temporary placement support located below the shaft support of the medium supplier and that receives and supports the roll medium prior to being attached to the medium supplier, and a conveyor that conveys a medium in a conveyance direction that is perpendicular or substantially perpendicular to an axial direction of the supply shaft, the medium being unwound from the supply shaft. The medium temporary placement support includes a support bar that extends in the axial direction, and a placement seat supported by the support bar. The placement seat includes a placement surface on which the roll medium is placed and that extends in the conveyance direction, and a curved portion that includes a convex curve in an upstream end portion of the placement surface in the conveyance direction.