Cartridge Case Member Shutter Pressing Section Design
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Solution Overview
Problem
The existing cartridges for magneto-optical and phase-change-type write-once recording media face issues with increased costs and inefficiencies due to the separate formation of shutter and case members, leading to distortion and poor sliding properties, which affect recording and reproduction operations.
Innovation Solution
The case member is designed with an integrated shutter pressing section, featuring a connection portion between eaves sections to disperse distortion forces and enhance mechanical strength, allowing for improved sliding properties and accurate positioning on a tray.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shutter member and case member are formed as separate members, then the shutter member can slide on the case member, but the number of parts and production steps increases, leading to increased cost
Solution Approach 1:
The shutter pressing section is integrally formed with the case member as a single piece, eliminating the need for separate components. This merging reduces the number of parts and production steps while maintaining the sliding function through proper design of the integrated structure.
2Reliability
If the shutter pressing section is attached to the case member by adhesive, then the shutter pressing section can be secured, but too much adhesive causes adhesion to the case member and too little adhesive causes insufficient adhesion
Solution Approach 1:
The shutter pressing section is formed as an integral part of the case member through injection molding, eliminating the need for adhesive attachment. This resolves the contradiction by removing the adhesive application step entirely, avoiding both excessive and insufficient adhesion issues while simplifying manufacturing.
3Reliability
If the shutter pressing section is attached to the case member by thermal fusion, then the shutter pressing section can be secured, but the case member may be distorted during the fusion step
Solution Approach 1:
The shutter pressing section is formed integrally with the case member in a single injection molding process, eliminating the need for thermal fusion attachment. This prevents case member distortion during fusion while maintaining strong connection through the integrated structure.
4Ease of manufacture
If the case member is distorted during production, then the shutter pressing section attachment becomes problematic, but the distortion affects the sliding properties and positioning accuracy
Solution Approach 1:
The integrated formation of the shutter pressing section and case member ensures that distortion forces are distributed throughout the unified structure rather than concentrating at attachment points. This maintains positioning accuracy while allowing production flexibility through single-step injection molding.
Data Source
AI summary
A cartridge includes a case member (500) and a shutter member (100). The case member (500) includes a upper case section (505) and a lowercase section (506). A step portion (507) is formed at a boundary (508) between the upper case section (505) and the lower case section (506). The upper case section (505) includes a shutter pressing section (517) including a plurality of eaves sections (510). Each of the plurality of eaves sections (510) is configured to engage with the eaves engagement section (104) of the shutter member (100). At least two of the plurality of eaves sections (510) are located spaced apart from each other by a predetermined distance (519). The lower case section (505) includes a connection portion (520). The connection portion (520) is connected to the step portion (507) at a location between the at least two eaves sections (510), which are located spaced apart from each other by the predetermined distance (519), of the plurality of eaves sections (510).