Printer Paper Roll Holder with Dual Support and Anti-Loss Grooves
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Solution Overview
Problem
Printers using the drop-in setting method for paper rolls often result in the loss of the holding member, which is not used when this method is employed, leading to inconvenience and reduced functionality.
Innovation Solution
A printer design that includes a paper roll holder with a shaft and a dual support system, allowing the shaft to be rotatably supported both when inserted into the paper roll's core and when abutting its outer circumference, with a holding member that can be securely positioned in grooves to prevent loss and facilitate smooth paper roll rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the drop-in setting method is used where the paper roll is dropped into the paper storage section and the outer peripheral surface is supported with the inner peripheral surface, then the structure is simple and easy to operate, but the holding member is not used and may get lost
Solution Approach 1:
The holding member is designed to serve dual functions: it can be inserted into the shaft core of paper rolls with small diameter shaft cores for support, and it can also be inserted into grooves in the paper storage section to prevent loss during drop-in setting. This multi-functionality resolves the contradiction by making the holding member useful in both setting methods, eliminating the risk of loss while maintaining ease of operation.
2Reliability
If the shaft core setting method is used where the shaft core is supported by the holding member, then the paper roll is securely held, but the structure becomes more complex and the holding member may be lost when not used
Solution Approach 1:
The holding member integrates multiple functions into a single component: it supports shaft cores of paper rolls, prevents loss during drop-in setting via groove engagement, and provides rotational support through the paper storage section. This eliminates the need for separate structures for each function, resolving the contradiction between reliability and device complexity.
Solution Approach 2:
The holding member features a nested structure with a shaft portion that fits into paper roll shaft cores, and groove engagement portions that fit into grooves in the paper storage section. This nested design allows the holding member to compactly provide multiple functions without increasing overall structural complexity.
3Reliability
If a dual support system is implemented to support the shaft both when inserted into the paper roll core and when abutting the outer circumference, then the holding member can prevent loss, but the device complexity increases
Solution Approach 1:
The dual support function is merged into a single holding member structure. The shaft portion provides support when inserted into paper roll cores, while the groove engagement portions provide support and loss prevention when inserted into grooves in the paper storage section. This merging resolves the contradiction by achieving dual support functionality without requiring separate components, thus not increasing device complexity.
Data Source
AI summary
A printer includes a paper roll holder having a shaft, a paper roll storage section, and a print unit. The paper roll storage section has a first support configured to rotatably support the shaft of the paper roll holder when the paper roll holder is inserted into a shaft core of a paper roll, and a second support configured to rotatably support the shaft of the paper roll holder when the paper roll holder is not inserted into the shaft core of the paper roll and at a position where the paper roll holder abuts an outer circumference of the paper roll when the shaft of the paper roll holder is rotatably supported by the second support. The print unit is configured to form an image on paper to be supplied from the paper roll.