Gas Generator Holder Structure for High Pressure in Compact Packaging
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Solution Overview
Problem
Existing gas generators face challenges in achieving high output, high pressure resistance, and reduced size and weight, with the holder being a critical component that requires improved mountability and mechanical strength while minimizing weight and size.
Innovation Solution
The gas generator design includes a holder with specific recessed portions and a partition portion, featuring a stepped bottom surface and an annular groove, ensuring a condition of A < B < C, which enhances mechanical strength and allows for increased gas volume without increasing the holder's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the holder is made with high mechanical strength to withstand high pressure during activation, then pressure resistance performance is improved, but weight and size increase
Solution Approach 1:
The holder employs local quality by concentrating reinforcement only where needed - specifically at the partition portion between the first and second recessed portions. This localized reinforcement at the high-stress partition area provides sufficient pressure resistance without requiring the entire holder to be厚重, thus maintaining weight reduction while ensuring mechanical strength.
2Productivity
If the volume of the cup is increased to improve gas generation output, then gas output is improved, but the size and weight of the gas generator increase
Solution Approach 1:
The holder extends in the axial direction with a partition portion that creates vertical separation between the igniter recessed portion and connector recessed portion. This dimensional arrangement allows the cup to achieve sufficient volume for gas generation while maintaining a compact overall structure through efficient spatial organization along the axial dimension.
3Ease of operation
If the holder size is reduced to improve mountability and reduce weight, then ease of installation is improved, but mechanical strength and pressure resistance deteriorate
Solution Approach 1:
The holder is segmented into functionally distinct regions: a first recessed portion for the igniter, a partition portion for structural reinforcement, and a second recessed portion for the connector. This segmentation allows each portion to be optimized independently - the partition portion provides mechanical strength while the recessed portions are sized for easy assembly, achieving both mountability and structural integrity.
4Ease of manufacture
If the holder structure is simplified to reduce manufacturing complexity, then ease of manufacture is improved, but the ability to secure both pressure resistance and compact size deteriorates
Solution Approach 1:
The partition portion serves multiple functions simultaneously: it separates the igniter and connector recessed portions, provides structural reinforcement to withstand pressure, and defines the axial spacing between components. This merging of separation, reinforcement, and positioning functions into a single structural element simplifies manufacturing while ensuring pressure resistance and compact dimensions.
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 achieves high output, high pressure resistance, and reduced size and weight, ensuring stable operation by distributing stress effectively and allowing for easier connector attachment.
Implementation Method 1
a gas generating agent 50 that generates gas by burning
Data Source
Figure 1
Figure 2
Figure 3(A)~3(B)
AI summary
A gas generator (1) includes a cup (40) where a gas generating agent is accommodated and a holder (10). The holder (10) includes a first recessed portion (12) and an annular groove (16) provided in an end surface on a side facing the cup (40), a second recessed portion (13) provided in an end surface on an opposite side, and a partition portion (14) that serves as a partition between the first recessed portion (12) and the second recessed portion (13). A bottom surface (12a) of the first recessed portion (12) includes a first bottom surface (12a1) and a second bottom surface (12a2) located on an inner side thereof and located on a side of the second recessed portion (13). The gas generator (1) satisfies a condition of A < B < C, where A represents a distance from the second bottom surface (12a2) to a bottom surface (13a) of the second recessed portion (13), B represents a distance from the first bottom surface (12a1) to the bottom surface (13a) of the second recessed portion (13), and C represents a distance from the bottom surface (13a) of the second recessed portion (13) to the annular groove (16).