Drawer Guide Heat Dissipation for Image Reader Maintenance
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Solution Overview
Problem
Existing image reading apparatuses face challenges in maintaining colorimetric accuracy of spectrophotometers and facilitating maintenance of image readers due to potential contact between the image reader and sheet support member during maintenance, which can cause flaws and temperature-induced thermochromism affecting measurement results.
Innovation Solution
The design includes a drawer guide that maintains a safe distance between the light transmitting member and the sheet support member, allowing heat generated during illumination to be transferred outside the housing, and incorporates a metallic drawer guide with high thermal conductivity to dissipate heat and prevent contact, ensuring accurate colorimetric measurements and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the image reader is pulled out for maintenance, then maintenance accessibility is improved, but the image reader may contact the sheet support member causing flaws
Solution Approach 1:
The drawer guide applies preliminary anti-action by pre-establishing a protective spatial relationship between the image reader and sheet support member. The guide structure is designed beforehand to maintain a safe distance, preventing contact before it can occur during the maintenance withdrawal process.
Solution Approach 2:
The drawer guide acts as an intermediary element between the image reader and sheet support member. It mediates the withdrawal motion, ensuring the image reader moves along a controlled path that maintains proper spacing, thus preventing direct contact between the two components.
2Manufacturing precision
If the image reader is positioned close to the sheet support member, then reading precision is improved, but heat from illumination affects the spectrophotometer causing thermochromism
Solution Approach 1:
The drawer guide segments the housing into distinct thermal zones. It creates a physical barrier that separates the heat-generating illumination region from the spectrophotometer region, allowing the image reader to maintain its optimal reading position while protecting the spectrophotometer from thermal interference.
Solution Approach 2:
The drawer guide extracts and redirects heat away from the spectrophotometer. By providing a dedicated heat dissipation path, it removes the harmful thermal effect from the measurement environment while preserving the necessary proximity for accurate reading.
3Measurement precision
If heat is dissipated from the image reader, then colorimetric accuracy is improved, but the reading distance may increase beyond optimal range
Solution Approach 1:
The drawer guide utilizes the lateral dimension for heat dissipation while preserving the vertical reading distance. Heat is channeled sideways through the guide structure rather than forcing the image reader to move away vertically, thus maintaining optimal reading distance while achieving thermal management.
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 solution maintains colorimetric accuracy of the spectrophotometer and facilitates the maintenance of the image reader by preventing contact and temperature-induced errors, while the metallic drawer guide enhances heat dissipation and structural integrity.
Implementation Method 1
the drawer guide transfers heat, which is generated when radiating the illumination light, to the outside of the reading housing
Implementation Method 2
incorporates a metallic drawer guide with high thermal conductivity to dissipate heat
Data Source
AI summary
An image reading apparatus includes: a paper path; an image reader which reads a side of the sheet conveyed along the paper path in a reading position; a sheet support member located opposite to the image reader to support a rear surface opposite to a surface to be read of the sheet; a spectrophotometer which colorimetrically measures color of an image formed on the sheet; and an image reading housing which accommodates the image reader and the spectrophotometer. The image reader includes: a reading housing; and a drawer guide provided in the reading housing such that it can be drawn from the image reading housing, and maintains the distance between a light transmitting member housed in the reading housing and the sheet support member to be greater than a reading distance lower limit. The drawer guide transfers heat to the outside of the reading housing.