Swingable Board Stabilization for Printer Tray Noise Reduction
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Solution Overview
Problem
Sheet storage devices in printers often produce rattling noise due to vibration when handled, as the stackable board alternately conflicts with the feeder tray's bottom, leading to repetitive rattling noise.
Innovation Solution
A sheet storage device with a swingably supported board and a projection from the storage tray's bottom that contacts the board at a position closer to the board's end, reducing rattling noise by stabilizing the board during movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the board is swingably supported by the storage tray, then the board can be easily adjusted and accessed, but the board rattles and produces noise when the storage tray is moved
Solution Approach 1:
A projection is introduced as an intermediary element between the storage tray bottom and the board. This projection acts as a mediator that prevents direct contact and rattling between the board and tray bottom while allowing the board to remain swingably supported. The projection contacts the board at a position closer to the second end, providing stabilization without restricting the swing motion.
Solution Approach 2:
The projection is positioned specifically at a location closer to the second end of the board rather than uniformly distributed. This local positioning provides targeted stabilization at the most critical rattling point while maintaining the overall swingable support function. The contact part length is specifically designed to be smaller than the board length at that position, providing precise local control.
2Quantity of substance
If the board is made longer to increase storage capacity, then more sheets can be stored, but the rattling problem worsens
Solution Approach 1:
The projection serves as a mediator that scales with the board length. As the board becomes longer to increase storage capacity, the projection provides corresponding stabilization at the second end, preventing the board from rattling against the tray bottom. This allows extended board length without proportional increase in rattling problems.
Solution Approach 2:
The solution moves the stabilization function to a different spatial dimension by introducing the projection from the tray bottom upward to contact the board. This vertical dimension allows the board to be longer horizontally while providing stabilization through the projection's contact point, decoupling the length increase from the rattling problem.
Data Source
AI summary
A sheet storage device, including a storage tray configured to store a sheet therein; a board, on which the sheet to be stored in the storage tray is placed, the board being configured to be swingably supported by the storage tray at a first position closer to a first end thereof than a second end being opposite from the first end to swing about a swing axis; and a projection configured to protrude from a bottom of the storage tray toward the board, the projection including a contact part being configured to contact the board member at a second position closer to the second end than to the first end of the board, is provided. A length of the contact part along an axial direction of the swing axis is smaller than a length of the board at the second position closer to the second end.