Rolled Sheet Guide Dynamics for Orientation-Resilient Printers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Printers with a rolled sheet storage unit face issues with accurately detecting the remaining amount of the sheet when the orientation is changed, particularly when the cover is opened laterally, causing the sheet to move out of position and hinder the housing from closing.
Innovation Solution
A printer design that includes a rolled sheet guide which moves between retaining positions as the cover rotates, maintaining the sheet at an appropriate position for detection regardless of orientation changes, using a transmission mechanism to align the sheet with a remaining amount sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cover is opened laterally rather than upwardly, then the printer can be used in different orientations, but the rolled sheet moves in the rolling direction and hinders the housing from being closed
Solution Approach 1:
The rolled sheet guide is designed to move dynamically between a first retaining position and a second retaining position based on the cover's rotation state. When the cover rotates to open, the guide moves to the second position closer to the cover; when the cover rotates to close, the guide moves back to the first position, preventing the rolled sheet from hindering closure.
Solution Approach 2:
The rolled sheet guide acts as an intermediary mechanism between the cover and the rolled sheet. It mediates the interaction by controlling the rolled sheet's position during cover rotation, ensuring the sheet does not interfere with the closing operation while allowing the cover to open and close reliably.
2Adaptability or versatility
If the orientation of the printer is changed, then the printer can adapt to different surfaces, but the rolled sheet moves from the appropriate position and the remaining amount cannot be correctly detected
Solution Approach 1:
The rolled sheet guide moves dynamically with the cover rotation to maintain the rolled sheet at the appropriate position regardless of the printer's orientation. This ensures the remaining amount sensor consistently detects the sheet amount accurately whether the printer is placed on its front surface, rear surface, left surface, or right surface.
3Measurement precision
If a structure is used to press the rolled sheet to keep it at the appropriate position, then detection accuracy is improved, but the sheet may move and hinder housing closure when the cover opens laterally
Solution Approach 1:
Instead of a fixed pressing structure, the invention uses a dynamic rolled sheet guide that changes position based on cover rotation. The guide moves to a second position during cover opening and returns to a first position during closure, maintaining detection accuracy while preventing interference with housing closure.
Solution Approach 2:
The rolled sheet guide is positioned in advance at appropriate locations (first and second retaining positions) depending on the cover's rotation state. This preliminary positioning ensures the sheet is correctly held for detection when the cover is closed and moves away to prevent interference before the cover closes.
Data Source
AI summary
A printer includes a housing including a storage unit for storing a rolled sheet, an opening through which the rolled sheet can be set, and first and second surfaces, the first and second surfaces being connected to each other, a cover rotatably attached to the housing to cover the opening, the cover being parallel to the first surface when covering the opening, a printing head configured to print on a portion of the rolled sheet, and a rolled sheet guide for retaining the rolled sheet in the storage unit. The rolled sheet guide moves from a first retaining position to a second retaining position that is closer to the cover than the first retaining position as the cover rotates to open, and moves from the second retaining position to the first retaining position as the cover rotates to close.