Straddle Seat Cover Locking via Downward Extension
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Solution Overview
Problem
Straddle-type seats with detachable cover members face issues of detachment during occupancy or impact, compromising the crime prevention properties due to their simple lid shape.
Innovation Solution
A straddle-type seat design featuring a cover member with a lid portion and a downward extension portion that locks onto a lock portion on the seat main body, preventing detachment and enhancing crime prevention by forming a tongue-like or deformable shape for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple lid-shaped cover member is used to close the through hole, then the manufacturing complexity is reduced, but the cover member becomes easily detached during occupancy or impact, compromising reliability
Solution Approach 1:
The cover member is segmented into a lid portion and a downward extension portion, with the extension portion providing locking engagement with the lock portion on the seat main body. This segmentation allows the cover member to maintain manufacturing simplicity while achieving reliable attachment through the distributed locking mechanism.
Solution Approach 2:
The cover member extends from the two-dimensional lid shape into the third dimension with the downward extension portion that locks onto the lock portion. This dimensional transition enables secure attachment by engaging the extension portion with the lock portion, preventing detachment while maintaining ease of manufacture.
2Device complexity
If a simple lid-shaped cover member is used, then the manufacturing cost and complexity are reduced, but the crime prevention property is compromised due to easy detachment
Solution Approach 1:
The cover member structure is divided into functional segments: the lid portion for closing the hole and the downward extension portion for secure locking. This segmentation enables the cover member to maintain structural simplicity while achieving high crime prevention properties through reliable attachment to the seat main body.
Solution Approach 2:
The cover member uses a simple, cost-effective structure with a downward extension portion that provides sufficient security for its intended purpose. The design balances affordability with effective crime prevention by ensuring the cover cannot be easily detached, making it suitable for applications where cost and security both matter.
3Reliability
If the downward extension portion is locked to a lock portion on the bottom surface, then the cover member attachment reliability is improved, but the attachment mechanism complexity increases
Solution Approach 1:
The locking function is extracted as a separate downward extension portion that engages with a dedicated lock portion on the seat main body. This extraction allows the locking mechanism to remain simple while achieving high reliability, as the extension portion can be formed as an integral part of the cover member without requiring complex additional components.
Data Source
AI summary
Provided is a straddle-type seat configured to prevent a cover member from being detached and to increase a crime prevention property. The cover member is configured to close a through hole formed on a seat surface. The seat is configured to support a seated occupant in a straddle state and includes a seat main body on which the occupant sits, and a cover member that covers the through hole formed in the seat main body. The cover member includes a lid portion that closes the through hole on a top surface of the seat main body, and a downward extension portion that downwardly extends from the lid portion. The downward extension portion is locked to a T-like shape protrusion formed on a bottom surface of the seat main body.