Printer Damper Mechanism for Sensor Protection and Label Tension
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Solution Overview
Problem
Conventional printers with vertically divided structures for opening the paper path to set label paper risk damaging the sensor unit if the upper unit is closed without properly closing the sensor unit, leading to potential damage during paper setting.
Innovation Solution
A printer design featuring a damper mechanism with a spring-activated paper abutment portion that ensures the paper path is closed correctly, preventing damage to the sensor unit by automatically locking the upper sensor holder when the upper unit is closed, and a damper mechanism to manage label paper tension for consistent printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the upper unit is opened to set paper, then the paper path can be accessed for paper setting, but the sensor unit may be damaged if forgotten to be closed
Solution Approach 1:
The damper mechanism is activated in advance when the upper unit is opened, automatically opening the sensor unit's paper path. This preliminary action ensures the sensor unit is properly positioned before paper setting begins, preventing damage from forgotten closure operations.
Solution Approach 2:
The damper mechanism serves dual functions: it automatically opens and closes the sensor unit's paper path based on the upper unit's state, eliminating the need for manual intervention. The system self-regulates to prevent sensor damage while facilitating paper setting.
2Measurement precision
If a transmission type sensor is used for label paper detection, then accurate printing start position detection is achieved, but paper must be inserted between light emitting and receiving portions which is troublesome
Solution Approach 1:
The damper mechanism opens the sensor unit's paper path in advance, allowing paper to be fed through without manual insertion between the light emitting and receiving portions. This preliminary opening action simplifies the paper setting process while maintaining accurate detection capability.
3Ease of operation
If the sensor unit is opened to facilitate paper setting, then paper path access is improved, but the structure becomes more complex with additional moving parts
Solution Approach 1:
The damper mechanism is integrated with the sensor unit structure, combining the paper path opening/closing function with the existing sensor housing. This merging approach provides the needed accessibility without adding a completely separate mechanism, thus limiting the increase in overall device complexity.
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
Prevents damage to the sensor unit by ensuring it is closed during the upper unit's closure and maintains consistent label paper tension for reliable printing operations.
Implementation Method 1
the spring pressing the paper abutment portion against the paper conveyed along the paper path and applying tension to the paper
Data Source
AI summary
A printer includes an upper unit which opens and closes about a fulcrum lying at a rear position of a lower unit, and a paper path which is opened by opening the upper unit. A sensor unit is attached to the lower unit and includes a lower sensor holder and an upper sensor holder which are disposed in opposition to each other via the paper path. The paper path can be opened by pivoting the upper sensor holder relative to the lower sensor holder. When the upper unit is closed, the upper sensor holder is also closed in accordance with a closing pivoting motion of the upper unit.