Housing Confirming Portion for Plate Spring Attachment Verification
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Solution Overview
Problem
It is difficult to confirm whether a plate-shaped elastic member, such as a plate spring, is properly attached to a housing in seatbelt apparatuses, especially in configurations where the spring member is not biased correctly, making it hard to visually or mechanically verify the attachment.
Innovation Solution
Incorporating a confirming portion within the housing at the elastic member attachment area, allowing for visual or simple mechanical confirmation of the plate-shaped elastic member's proper attachment, eliminating the need for expensive sensors and ensuring reliable attachment verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plate-shaped elastic member is attached inside the housing, then the seatbelt apparatus functions properly, but it becomes difficult to confirm whether the attachment is correct
Solution Approach 1:
A confirming portion is introduced as an intermediary element between the plate-shaped elastic member and the external observer. This confirming portion extends from the attachment location to the outer surface of the housing, allowing the attachment state to be verified without direct observation of the internal attachment point. The confirming portion acts as a mediator that translates internal attachment status into externally visible information.
Solution Approach 2:
The attachment verification is shifted from the internal three-dimensional space to the external two-dimensional surface of the housing. By extending the confirming portion to the outer surface, the attachment state that was previously hidden in the internal volume becomes accessible on the external surface, enabling verification without disassembly or complex internal inspection.
2Measurement precision
If expensive sensors are used to verify attachment, then detection accuracy improves, but device complexity and cost increase
Solution Approach 1:
The housing structure itself provides the verification function through the confirming portion, eliminating the need for separate sensing systems. The confirming portion is an integral part of the housing that leverages the existing structural elements to provide attachment verification, allowing the system to verify its own attachment state without external assistance or complex sensing mechanisms.
Solution Approach 2:
The confirming portion is implemented as a simple, inexpensive structural feature rather than a complex, expensive sensor system. It uses basic material properties and simple geometry to provide verification functionality, replacing what would otherwise require costly electronic sensors and associated processing systems.
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
Enables reliable and cost-effective confirmation of the plate-shaped elastic member's attachment, preventing improper bending and ensuring the spring member is correctly biased, thus preventing accidental release in seatbelt systems.
Implementation Method 1
a plate-shaped elastic member attached in an interior portion of the housing
Data Source
AI summary
An assembled structure comprising: a housing; a plate-shaped elastic member attached in the interior portion of the housing; and a confirming portion for confirming a state of attachment of the plate-shaped elastic member, wherein the confirming portion is provided in an elastic member attachment portion where the plate-shaped elastic member is attached in the housing, and is formed so as to confirm that the plate-shaped elastic member is properly attached in the housing with a predetermined positional relation between an attachment region of the plate-shaped elastic member attached to the housing and the confirming portion, is provided.