Carrier Tape Cassette Shutter for Roll Body Ejection Control
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Solution Overview
Problem
The existing housing devices for roll bodies of carrier tapes are prone to unexpected jumping out when the device's attitude changes, necessitating careful handling during transportation and storage.
Innovation Solution
A housing device with a housing space and an opening for roll body insertion and removal, equipped with a restriction part that can be displaced between positions to prevent unintended ejection, using a shutter mechanism to control access to the opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the housing device is designed with an openable case structure for easy access, then the ease of operation is improved, but the roll body may unexpectedly jump out when the device attitude changes
Solution Approach 1:
The housing device applies preliminary anti-action by providing a retention structure that preemptively counteracts the force causing the roll body to jump out. The retention protrusion and retention groove engage before any unintended movement occurs, creating a preventive mechanism that opposes potential ejection forces during attitude changes or transportation.
Solution Approach 2:
The housing device incorporates dynamics by making the retention mechanism selectively engageable and disengageable. The retention protrusion can be moved between an engaged position (blocking the opening) and a disengaged position (allowing access), enabling the system to adapt between stable containment during storage/transport and easy access during operation.
2Ease of operation
If the opening is kept open for easy insertion and removal of roll body, then the ease of operation is improved, but the roll body may jump out during transportation and storage
Solution Approach 1:
The housing device applies preliminary action by automatically engaging the retention protrusion with the retention groove when the cover is closed or before the roll body is fully inserted. This preliminary engagement occurs as a natural consequence of the insertion action, ensuring the roll body is secured without requiring separate manual intervention, thus preventing unintended ejection during subsequent handling.
Solution Approach 2:
The retention protrusion and retention groove act as intermediary elements between the cover and the roll body. These intermediary structures mediate the interaction by providing a mechanical interface that secures the roll body in place while allowing controlled access, thus preventing direct contact-based ejection forces from affecting the roll body during transportation and storage.
3Reliability
If a retention mechanism is added to prevent roll body from jumping out, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The housing device applies merging by integrating the retention mechanism directly into the existing cover and housing structure. The retention protrusion is formed as part of the cover assembly, and the retention groove is formed on the housing, combining multiple functions (closure and retention) into a unified structure rather than adding separate independent components.
Solution Approach 2:
The retention mechanism applies self-service by utilizing the natural closing motion of the cover to automatically engage the retention protrusion with the retention groove. The system serves itself by converting the routine closing action into the retention engagement action, eliminating the need for separate manual operations or additional actuating mechanisms to secure the roll body.
Data Source
AI summary
Tape cassette (22) of the present disclosure configured to house roll body (RT) of a carrier tape includes housing (41) and shutter (42). Housing (41) includes housing space (41S) for housing roll body (RT) and front opening (41K) through which roll body (RT) is allowed to be taken in and out in a front part of housing (41). Shutter (42) can be displaced between a closing position at which movement of roll body (RT) to an outside of housing (41) through front opening (41K) is restricted by blocking at least a part of front opening (41K) and an open position at which the movement of roll body (RT) to the outside of housing (41) through front opening (41K) is allowed. Housing (41) is equipped on a component mounting device with front opening (41K) facing the component mounting device, and supplies roll body (RT) to the component mounting device with shutter (42) positioned at the open position.