Tray Position Detection for Accurate CD Recording
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Solution Overview
Problem
Current recording apparatuses face challenges when printing on thick media like CDs due to rigidity issues, leading to detection errors, increased manufacturing costs, and potential scratching of reflection plates, which affects detection accuracy and printing quality.
Innovation Solution
A recording apparatus design that incorporates a tray with detection marks and a position detection system using reflective materials and inclined surfaces to accurately determine the tray's position, preventing misalignment and scratches, and ensuring accurate printing of CDs at a lower cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reflection plate is formed on a raised surface by hot stamping, then detection accuracy is improved, but manufacturing cost increases and the risk of scratching increases
Solution Approach 1:
The invention extracts the detection mark from the raised surface structure and places it directly on the flat tray surface. This eliminates the need for hot stamping process and the associated raised portion, thereby reducing manufacturing cost while maintaining detection accuracy through the use of a simple printed or applied mark that the sensor can detect.
Solution Approach 2:
The invention uses a simple detection mark that can be printed or applied directly on the tray surface instead of a durable hot-stamped reflection plate. This cheaper alternative achieves the same detection function without requiring the complex hot stamping process, reducing manufacturing costs while maintaining sufficient detection accuracy.
2Measurement precision
If a reflection plate is formed on a raised surface, then detection accuracy is improved, but the risk of scratching and detection errors increases
Solution Approach 1:
The invention removes the detection mark from the vulnerable raised surface and places it on the flat tray surface. This eliminates the protruding structure that is prone to scratching during handling, while the detection mark remains accessible to the sensor for accurate detection.
Solution Approach 2:
Instead of creating a raised surface to enhance detection, the invention inverts the approach by using a flat surface with a detection mark that is detected through optical reflection or other sensing methods. This inversion eliminates the scratching risk associated with raised edges while maintaining detection functionality.
3Device complexity
If hot stamping is used to form the reflection face directly on the tray surface, then manufacturing complexity is reduced, but printing shifting and chipping occur causing detection errors
Solution Approach 1:
The invention uses a detection mark that is printed or applied on the tray surface as a copy or representation of the reflection plate function. This simple mark serves the same purpose as the hot-stamped reflection face but without the defects of printing shifting and chipping, as it can be applied as a durable graphic or embedded feature that maintains its integrity.
4Device complexity
If the same path is used for conveying both cut sheets and recording members, then device complexity is reduced, but conveying performance degrades due to rigidity issues
Solution Approach 1:
The invention makes the tray serving as both a support structure and a detection reference. The tray itself with its detection mark provides the necessary positioning and detection functions, eliminating the need for separate raised surfaces or complex conveying mechanisms, thereby achieving multi-functionality with a simple structure.
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
The solution enables precise detection and printing of CDs by protecting the detection marks from scratches and ensuring accurate positioning, thereby improving printing quality and reducing manufacturing costs while maintaining high accuracy.
Implementation Method 1
an inclined surface is formed around the reflection plate... to increase the detection accuracy of reading the reflection plate
Data Source
AI summary
Disclosed is a recording apparatus that can accurately detect the position of a recording member, such as thick paper or a CD-R, that is mounted on a tray, that can, as much as possible, protect to-be-detected portions from being scratched, and that can perform accurate printing using a simple structure.With a configuration wherein a recording member such as thick paper or a CD-R is mounted on a tray, and wherein the recording member is printed while the tray is conveyed, a reference position detection mark, which is a to-be-detected portion, is attached to the tray from the reverse face, and the edges of a reference position detection mark that has been detected are made as the edges of a hole portion that is formed in the tray.