Seat Belt Bag Body Deployment Portion for Gas Flow
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Solution Overview
Problem
Existing seatbelt devices face difficulties in allowing fluid to pass through folding positions due to tube compression, which hampers gas flow and inflation during emergencies.
Innovation Solution
The seatbelt device incorporates a bag body with a deployment portion on the width or thickness side of the webbing, an anchor member with an insertion hole, and a non-inflating portion to facilitate fluid passage, ensuring efficient inflation and expansion by directing gas flow through specific passages and deployment areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the tube is disposed inside the seatbelt and folded together with the seatbelt at the insertion hole, then the structure is compact and integrated, but the tube is crushed by the seatbelt making it difficult for gas to pass through
Solution Approach 1:
The patent positions the deployment portion at the width direction outer side or thickness direction other side of the webbing, moving it to a different spatial dimension where it won't be crushed by folding. This dimensional relocation allows the gas passage function to be preserved while maintaining structural integration.
Solution Approach 2:
The deployment portion acts as an intermediary structure that provides an alternative gas passage route. When the main tube is crushed at the folding position, the deployment portion serves as a mediator to allow gas to reach the inflated portion through its deployment holes, ensuring gas flow reliability.
2Reliability
If the bag body is inflated by gas pressure, then the protective function is enhanced, but the folding position becomes blocked and gas cannot pass through
Solution Approach 1:
The bag body is segmented into the inflated portion and the deployment portion with deployment holes. This segmentation allows gas to pass through the deployment portion independently of the inflated portion, ensuring gas flow is not blocked by the inflation process.
Solution Approach 2:
The deployment portion is positioned at the width direction outer side or thickness direction other side of the webbing, creating a separate spatial dimension for gas passage. This allows gas to flow through the deployment portion without being obstructed by the inflated portion's expansion.
3Ease of operation
If the webbing is folded back at the insertion hole for application, then the seatbelt can be properly applied to the occupant, but the folding position compresses the bag body preventing gas passage
Solution Approach 1:
The deployment portion is located at the width direction outer side or thickness direction other side of the webbing, positioning it in a dimension that is not compressed by the folding action at the insertion hole. This ensures gas passage reliability is maintained while allowing proper webbing application.
4Ease of manufacture
If the tube is disposed inside the seatbelt for integrated structure, then manufacturing is simplified, but the tube position is restricted making gas passage difficult
Solution Approach 1:
The deployment portion extends to the width direction outer side or thickness direction other side of the webbing, providing gas passage capability in additional dimensions. This increases adaptability for gas flow while maintaining the integrated structure benefits for manufacturing.
Solution Approach 2:
The deployment portion with deployment holes provides multiple functions: it serves as both a structural component of the bag body and an alternative gas passage route. This multi-functionality ensures gas flow adaptability while maintaining structural integration for ease of manufacture.
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
This design enables easy fluid passage through folding positions, efficient inflation of the bag body, and increased pressure within the main body portion, effectively supporting the occupant during collisions by distributing load across a larger area.
Implementation Method 1
bag body that is inflatable by pressure of gas supplied from one side in the length direction of the bag body
Data Source
AI summary
A seatbelt device comprises a webbing, a bag body and an anchor member. The webbing is applied to the body of a vehicle occupant sitting on a seat. The bag body is provided along a length direction of the webbing, and the bag body is disposed at one side of the webbing and can be inflated by pressure of a fluid supplied from a length direction one side of the bag body. A deployment portion through which the fluid can pass is provided in the bag body, being disposed at width direction outer sides and a thickness direction another side of the webbing. An insertion hole is formed in the anchor member, through which the webbing and the bag body are inserted. The webbing is folded at the thickness direction one side when applied to the body of the sitting vehicle occupant, and the deployment portion of the bag body is disposed in the insertion hole.