Printer Lid Sensor Configuration for Jam Detection and Position Monitoring
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Solution Overview
Problem
Conventional printers require multiple sensors for accurate maintenance determination, increasing component costs and assembly complexity, making it difficult to reduce the printer's price while maintaining accuracy.
Innovation Solution
A printer configuration that reduces the number of sensors by using a dual-purpose sensor to detect both paper jams and the closed position of the lid, with a movable part and a first sensor to determine the lid's closed position, allowing for accurate determination with fewer components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are provided to accurately detect maintenance status and paper jams, then measurement precision is improved, but device complexity and component cost increase
Solution Approach 1:
The second sensor is designed to perform multiple functions: it detects both the closed position of the lid (by detecting the movable part in the normal state) and paper jams (by detecting the movable part when it moves due to sheet jamming). This multi-functionality reduces the total number of sensors required in the printer while maintaining accurate detection capabilities for both maintenance status and paper jams.
2Measurement precision
If multiple sensors are provided to accurately detect maintenance status and paper jams, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The second sensor serves dual purposes by detecting both lid closed position and paper jams, which reduces the total component count and assembly requirements. This multi-functional design lowers manufacturing costs while maintaining the precision needed for accurate maintenance status determination.
3Measurement precision
If multiple sensors are provided to accurately detect maintenance status and paper jams, then measurement precision is improved, but assembly complexity increases
Solution Approach 1:
By designing the second sensor to detect both lid position and paper jams through its interaction with the movable part, the system reduces the number of components that need to be assembled. This simplifies the assembly process while maintaining accurate detection capabilities for both maintenance status and paper jams.
Data Source
AI summary
A printer includes a body having an opening; a lid that is rotated to open and close the opening, a sheet discharge port being formed between the lid and the body when the lid is in a closed position; a printing mechanism; a first sensor that is disposed closer to a first end of the lid and is capable of detecting whether the first end of the lid is in the closed position; a movable part that is provided on one of the lid and the body and moves when pressed by a jammed sheet; and a second sensor that is provided on another one of the lid and the body at a position closer to a second end of the lid to detect the movable part and is capable of detecting that the second end is not in the closed position and the movable part is moved.