Rotatable Head Spring for Easy Printer Maintenance
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Solution Overview
Problem
Printers face challenges in easily replacing print heads without losing the head spring, which is often difficult to detach and can be misplaced during replacement due to its attachment mechanism.
Innovation Solution
A printer design featuring a rotatable head spring supported by a hook and frame, allowing the print head to be easily detached and reattached without losing the head spring, as the spring's biasing force is managed through rotation around a support, preventing detachment during replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the print head is pressed by a head spring against the platen roller to ensure stable printing, then printing stability is improved, but the print head becomes difficult to detach and replace
Solution Approach 1:
The head spring is designed to be rotatable about the support, allowing it to dynamically change its orientation. When replacing the print head, the head spring can be rotated to disengage from the hook, enabling easy removal without losing the spring. During printing, the spring maintains its biasing function for stable operation.
Solution Approach 2:
The attachment mechanism is segmented into a hook on the frame and a rotatable support on the head spring. This segmentation allows the print head to be detached by rotating the spring away from the hook, while the hook remains fixed on the frame, facilitating easy replacement while maintaining stability during operation.
2Force
If the head spring is attached to the frame to bias the print head toward the platen roller, then printing pressure is maintained, but the head spring may be lost when the print head is detached
Solution Approach 1:
The hook on the frame acts as an intermediary between the head spring and the print head replacement process. The head spring attaches to the hook during printing to maintain pressure, but can be rotated to disengage from the hook during replacement, preventing loss of the spring while maintaining its biasing function.
Solution Approach 2:
The rotatable connection between the head spring and the hook allows the spring to transition between a fixed attachment state (during printing) and a detached state (during replacement). This dynamic capability ensures the spring is retained when needed and can be easily removed when the print head is replaced.
3Ease of manufacture
If a simple head spring attachment mechanism is used to reduce device complexity, then manufacturing is easier, but the print head cannot be easily replaced without losing the spring
Solution Approach 1:
The rotatable support on the head spring provides a simple yet effective mechanism that enables easy print head replacement. The rotation capability allows the spring to disengage from the hook without complex locking or release mechanisms, maintaining manufacturing simplicity while improving replaceability.
Solution Approach 2:
The attachment mechanism is divided into a fixed hook on the frame and a rotatable support on the head spring. This simple segmentation provides an effective solution for easy replacement without requiring complex assembly or disassembly procedures, maintaining ease of manufacture.
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
Enables easy replacement of print heads without losing the head spring, ensuring efficient maintenance and reducing the risk of misplacement, thus improving operational efficiency and user convenience.
Implementation Method 1
a head spring that biases the print head toward the platen roller
Implementation Method 2
The head spring is rotatable about the support
Data Source
AI summary
A printer includes a print head that performs printing on a recording medium, a frame, a platen roller attached to the frame, a head spring that biases the print head toward the platen roller, a hook provided on a facing surface of the frame facing a back surface of the print head, and a support provided at an end of the head spring and attached to the hook. The head spring is rotatable about the support.