Printer Lower Guide for Warped Paper Jamming
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Solution Overview
Problem
Printers used in ticketing devices often experience paper jamming when users pull out partially printed recording paper, causing the paper to become warped and stuck between the thermal head and platen roller due to diagonal force application, leading to repeated jamming issues.
Innovation Solution
A printer design featuring a printer body with a recording-paper holder, a platen roller, a print head, and a lower guide that forms a conveying path between the holder guide and the lower guide to guide the recording paper, preventing warping and jamming by ensuring a controlled path for paper movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If recording paper is fed through a simple holder guide without a lower guide, then the device complexity is reduced, but the recording paper becomes warped and jammed when pulled during printing
Solution Approach 1:
A lower guide is introduced as an intermediary component between the holder guide and the thermal head to support the recording paper during feeding. This lower guide acts as a mediator that prevents the paper from warping when pulled, while the holder guide continues to guide the paper from above. The combination of upper (holder guide) and lower guides creates a stable paper path without requiring complete redesign of the paper feeding mechanism.
2Ease of operation
If the recording paper is allowed to be pulled freely during printing, then the ease of operation is improved, but the recording paper becomes jammed between the thermal head and platen roller
Solution Approach 1:
The lower guide serves as a mediator that supports the recording paper during the printing process, allowing users to pull the paper for removal while preventing it from being pulled at an angle that would cause jamming. The lower guide maintains proper paper alignment and support throughout the printing operation, enabling reliable paper feeding even when users need to remove partially printed paper.
Data Source
AI summary
A printer includes a printer body (110) including a recording-paper holder (111) that holds rolled recording paper (100) and includes a holder guide (112) for guiding the recording paper (100), a platen roller (140), a print head (130) attached to the printer body (110), and a lower guide (160) that is disposed to face the holder guide (112) such that a conveying path for guiding the recording paper (100) is formed between the lower guide (160) and the holder guide (112).