Independent Detection and Light-Shielding Levers in Conveyance Apparatus
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Solution Overview
Problem
Conventional conveyance apparatuses risk damaging the detection unit due to the integral movement of detection and light-shielding levers, which can lead to erroneous impacts and potential damage during guide opening for paper jam processing.
Innovation Solution
A conveyance apparatus design featuring a first guide fixed to the main body, a second guide that opens the path, a first lever for detecting the printing medium, and a second lever that shields light, allowing the first and second levers to swing independently based on the second guide's position, thereby preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the detection lever and light-shielding lever move integrally, then the structure is simple, but the detection unit is prone to damage during guide opening
Solution Approach 1:
The patent divides the originally integral detection lever and light-shielding lever into two separate levers. The detection lever (81) and light-shielding lever (82) are now independent components that can move separately, allowing the detection lever to retract into the guide body while the light-shielding lever remains stationary or moves independently. This segmentation prevents the detection lever from being damaged during guide opening operations.
2Ease of operation
If the detection lever retracts into the guide during guide opening, then the conveyance path is opened, but the detection lever may come off and fall causing damage
Solution Approach 1:
By separating the detection lever from the light-shielding lever, the patent allows the detection lever to be independently positioned and secured. The detection lever can retract into the guide body for safe storage during guide opening, while the light-shielding lever maintains its position to continue functioning. This independent segmentation prevents the detection lever from coming off and falling.
Solution Approach 2:
The patent introduces a lever connection spring (85) as an intermediary element that connects the detection lever and light-shielding lever. This spring allows the levers to move independently while maintaining a controlled relationship, enabling the detection lever to retract safely without compromising the overall detection unit stability.
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
This design prevents damage to the detection unit and maintains the printing medium detection function even when the outer guide is removed or subjected to accidental impacts, ensuring reliable operation.
Implementation Method 1
a second lever that shields light, wherein the first lever and the second lever can swing integrally or independently in accordance with the position of the second guide
Data Source
AI summary
A conveyance apparatus whose detection unit of a printing medium is unlikely to be damaged includes a first guide that is fixed to a main body; a second guide capable of moving to a position at which the second guide forms, together with the first guide, a conveyance path through which a printing medium is conveyed and a position at which the second guide opens the conveyance path; a first lever that is provided to the main body and which detects whether or not the printing medium exists in the conveyance path; and a second lever that shields light, wherein the first lever and the second lever can swing integrally or independently in accordance with the position of the second guide.