Document Reading Device Detection Member Merging
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Solution Overview
Problem
Existing document reading devices and image forming apparatuses face challenges in efficiently managing the open and closed states of the platen covering, leading to increased component count and costs, and difficulties in detecting the position of the reading unit without opening the platen covering in the closed state.
Innovation Solution
A document reading device with a detection member that detects the open and close movement of the platen covering, allowing the reading unit to be moved to a reference position where it can be detected without opening the platen covering, reducing the number of components and costs, and enabling precise control of the reading unit's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate detection mechanism is used to detect the reading unit position, then detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the platen covering open/close detection function and the reading unit position detection function into a single detection member. The detection member detects both the open/close state of the platen covering and the position of the reading unit, eliminating the need for separate detection mechanisms and reducing device complexity while maintaining detection accuracy
Solution Approach 2:
The detection member is designed to perform multiple functions: detecting the open/close state of the platen covering and detecting the position of the reading unit. This multi-functional approach reduces the number of components needed and simplifies the overall detection system
2Reliability
If multiple detection members are used to detect both platen covering state and reading unit position, then detection reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the detection of platen covering state and reading unit position into a single detection member, reducing the number of components from two to one while maintaining the ability to reliably detect both states through a unified detection mechanism
3Productivity
If the reading unit is always accessible when platen covering is closed, then operational efficiency is improved, but detection of reading unit position becomes difficult
Solution Approach 1:
The system performs preliminary detection of the reading unit position using the detection member before the platen covering is opened. This allows the control unit to know the reading unit position in advance, enabling operational efficiency while maintaining the ability to detect position with the platen covering closed
Solution Approach 2:
The detection member acts as an intermediary that can detect the reading unit position through or around the closed platen covering structure, enabling position detection without requiring the platen covering to be open
Data Source
AI summary
A document reading device includes a reading table, an openable member, a detection member, an open and close movement member, a reading member, a reading movement member, and a controller. The reading table, which allows a document to be placed thereon, is covered or uncovered by closing or opening the openable member. The open and close movement member is moved as the openable member is opened or closed. The open and close movement member positioned at the detection position is detected by the detection member. The reading member reads the document on the reading table while being moved by a drive force controlled by the controller. The reading movement member is moved as the reading member is moved. The reading movement member positioned at the detection position is detected by the detection member.