Gas Generator Initiator With Molded-In Grounding Path
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Solution Overview
Problem
Existing initiators for gas generators in vehicle safety devices lack an effective grounding path to the vehicle chassis, which can lead to electrical malfunctions and inefficiencies in deploying airbags and pretensioned seatbelts.
Innovation Solution
The initiator includes an electrically conductive member molded within an over-molded body, providing a grounding path to the vehicle chassis through a mounting ring and a ground wire, ensuring electrical communication and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing initiators are used without a molded-in conductive member, then the device complexity is reduced, but the electrical stability and grounding reliability deteriorate
Solution Approach 1:
The patent merges the grounding function into the initiator body by molding a conductive member directly into the insulating body during the manufacturing process. This integration eliminates the need for separate grounding components and their associated assembly steps, thereby improving grounding reliability while avoiding additional device complexity.
Solution Approach 2:
The conductive member is molded in place within the initiator housing, allowing the initiator to self-ground through its own structure. The conductive path is built-in during manufacturing, enabling the device to provide its own grounding solution without requiring external grounding components or complex assembly procedures.
2Stability of the object's composition
If an electrically conductive member is molded in place within the over-molded body, then the electrical stability is improved, but the manufacturing complexity increases
Solution Approach 1:
The conductive member is molded in place during the manufacturing process, establishing the electrical grounding path before the initiator is assembled or deployed. This preliminary integration ensures electrical stability is built-in from the start, avoiding the need for complex post-assembly grounding procedures.
3Productivity
If a grounding path is provided through a molded conductive member, then the deployment efficiency is improved, but the device complexity increases
Solution Approach 1:
The grounding function is merged into the initiator housing structure itself through the molded conductive member. This integration ensures that the grounding path is already established when the initiator is activated, improving deployment efficiency without requiring additional grounding components or assembly steps that would increase device complexity.
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 solution provides a reliable grounding path, enhancing the electrical stability and efficiency of the initiator, thereby improving the deployment of airbags and pretensioned seatbelts in vehicle safety systems.
Implementation Method 1
an electrically conductive member providing electrical communication between the mounting ring and an inner diameter of the pocket
Implementation Method 2
a cup defining an interior for receiving a pyrotechnic material
Implementation Method 3
The gas generant material is actuated by an initiator when a sensor of the vehicle senses an accident condition
Data Source
AI summary
An initiator for a gas generator of a vehicle safety device. The initiator is actuatable by an electrical power source and includes a cup defining an interior for receiving a pyrotechnic material, and a pair of electrical pins extending from the cup and arranged to be in reaction initiating communication with the pyrotechnic material through a bridge wire. The initiator additionally includes an over-molded body having a first end defining a pocket for receiving the electrical power source and a mounting ring extending around a least a portion of a periphery of the over-molded body. The initiator further includes an electrically conductive member providing electrical communication between the mounting ring and an inner diameter of the pocket. The electrically conductive member is molded in place within the over-molded body.