Roll Paper Printer Cover Pivoting Storage Unit
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Solution Overview
Problem
Roll paper printers face difficulties in replacing roll paper due to the roll paper falling out when the front cover is opened, as it tends to roll forward due to inertia, making it troublesome to load and unload.
Innovation Solution
A roll paper printer design with a pivoting roll paper storage unit and an urging member, such as a tension roller, that opposes the direction of roll paper movement when the cover opens, preventing it from falling out and maintaining constant tension for stable paper feed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the front cover is opened to allow roll paper replacement, then accessibility for loading roll paper is improved, but the roll paper falls out due to inertia
Solution Approach 1:
The urging member (spring-loaded arm) is pre-positioned to exert a restraining force on the roll paper before the cover is opened. This preliminary counter-action prevents the roll paper from falling out when the cover opens, while still allowing easy access for replacement when needed.
Solution Approach 2:
The urging member acts as an intermediary between the roll paper and the cover mechanism. It provides a controlled restraining force that prevents the roll paper from falling out, while allowing the cover to open freely for maintenance and replacement operations.
2Reliability
If the roll paper storage unit is fixed, then roll paper retention is improved, but replacement operation becomes troublesome
Solution Approach 1:
The roll paper storage unit is made dynamically movable (pivotable) rather than fixed, allowing it to rotate outward when the cover opens. This dynamic movement brings the stored roll paper closer to the opening for easier replacement, while the urging member ensures the roll paper remains retained during normal operation.
3Reliability
If an urging member is added to prevent roll paper from falling out, then roll paper retention is improved, but device complexity increases
Solution Approach 1:
The urging member is designed as a spring-loaded arm that automatically exerts restraining force on the roll paper without requiring external control or additional actuators. The spring mechanism self-regulates to provide the necessary retention force, preventing roll paper from falling out while adding minimal complexity to the overall system.
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
Facilitates easy loading and unloading of roll paper while preventing it from falling out, maintaining paper feed precision and stability without additional devices, ensuring reliable operation.
Implementation Method 1
an urging member that moves in conjunction with the opening and closing operation of the opening/closing cover, urges the roll paper stored in the roll paper storage unit in the opposite direction as the direction in which the opening/closing cover opens
Implementation Method 2
when the front cover is opened, inertia may cause the roll paper to keep rolling forward when it moves to the front and fall out of the printer
Data Source
AI summary
A printer has a roll paper compartment that stores roll paper so that it can roll on a horizontal axis of rotation, a roll paper cover that pivots to open and close the roll paper compartment, and a tension roller that is displaced when the roll paper cover pivots open and closed. The roll paper compartment is supported to pivot in the direction in which the roll paper cover rotates when the roll paper cover pivots open or closed. The tension roller is disposed to a position where it urges the roll paper opposite the direction in which the roll paper compartment moves circularly when the roll paper cover pivots in the opening direction.