Recording Device Lid Detection for Jam Prevention
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Solution Overview
Problem
In compact recording devices with multiple media supply paths, the lack of space often prevents the installation of sensors to detect paper insertion in manual feed supply paths, leading to potential paper jams in shared passage parts.
Innovation Solution
A recording device with a lid member that can be opened and closed, equipped with an open lid detection unit to ensure that recording media inserted through a supply port is evacuated from the shared passage part before other media is supplied, preventing jams by moving the media outside the shared passage part regardless of its presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor is installed to detect paper insertion in the manual feed supply path, then paper jam prevention is improved, but device complexity and space requirements increase
Solution Approach 1:
The lid member itself serves as the detection mechanism. When the lid is opened to insert paper, the open lid detection unit detects this state and automatically triggers the paper ejection operation, eliminating the need for separate paper presence sensors in the manual feed path.
Solution Approach 2:
The lid member performs multiple functions: it protects the manual feed supply path when closed and serves as a detection trigger when opened. This multi-functional design replaces what would otherwise require separate detection components.
2Reliability
If paper ejection operation is performed regardless of paper presence in shared passage part, then paper jam prevention is improved, but device complexity increases due to additional control logic
Solution Approach 1:
The system performs paper ejection in advance based on the open lid detection state, before new paper is supplied from the manual feed path. This preliminary action prevents potential paper jams without requiring complex real-time detection and decision-making logic.
Data Source
AI summary
To provide a recording device that can inhibit the occurrence of a recording media jam state in a shared passage part that is shared as a recording media shared path with a plurality of media supply paths, this is equipped with a plurality of conveyance paths for supplying paper, a shared passage part, a moving unit that moves the paper, a printing unit that performs printing on the paper, an insertion port that is able to insert paper in the conveyance path by paper being inserted, an opening and closing lid provided so that the insertion port can be opened and closed, a detection sensor for detecting an open lid state when the opening and closing lid opens the insertion port, and a movement control unit that, when the detection sensor detects the open lid state.