Pressure Airbag Sensor Mount With Rotation Locking and Sealing
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Solution Overview
Problem
Existing pressure-type airbag sensors have complex assembly structures that require additional components for rotational direction fixation and loosening prevention, complicating the installation process and increasing the risk of separation due to vibrations.
Innovation Solution
A fixing device with a holder and cover design that includes protrusion parts, locking parts, and a prevention plate to ensure smooth sealing and prevent separation, while also covering the connector housing to secure it from external fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional components such as rotational direction fixing part and loosening prevention part are added to the PSIS structure, then the reliability of preventing separation and ensuring proper rotation is improved, but the device complexity increases and the assembly structure becomes more complicated
Solution Approach 1:
The patent integrates the rotational direction fixing function and loosening prevention function into the basic holder-cover structure itself. The holder body includes integrated features such as the rotation prevention protrusion and the loosening prevention structure that work together with the cover to achieve both reliability goals without requiring separate additional components, thereby reducing device complexity while maintaining reliability
Solution Approach 2:
The holder and cover components are designed to perform multiple functions simultaneously. The holder body serves as both the mounting structure and the rotational direction fixer, while the cover provides both sealing and loosening prevention. This multi-functionality eliminates the need for separate specialized components, reducing overall device complexity while maintaining the required reliability
2Reliability
If the cover rotates to a set fastening position, then the sealing between the holder and cover is improved, but the protrusion parts may cause separation or misalignment during the rotation process
Solution Approach 1:
The patent incorporates a guide protrusion on the holder body that preliminarily guides the cover during the rotation process. This guide feature ensures that the cover follows the correct rotational path and aligns properly with the holder before reaching the fastening position, preventing misalignment and separation issues that would otherwise occur during rotation
Solution Approach 2:
The seal element acts as an intermediary between the holder and cover during rotation. It provides continuous contact and guidance throughout the rotation process, ensuring smooth movement while maintaining sealing. The seal accommodates minor misalignments and ensures that the holder and cover come together properly at the fastening position
3Ease of operation
If the connector housing is left exposed for easy access, then the ease of operation is improved, but the risk of accidental fastening or external interference increases
Solution Approach 1:
The patent incorporates a prevention plate that preliminarily blocks access to the connector housing before the holder and cover are fully assembled. This prevention feature is built into the structure and automatically activates during the assembly process, preventing accidental fastening or external interference with the connector housing while still allowing proper access during legitimate installation and maintenance operations
Data Source
AI summary
The present invention provides a fixing device for installing a pressure-type airbag sensor. The fixing device for installing a pressure-type airbag sensor includes a holder having a disk shape, a cover coupled to the holder and having a sensor unit disposed at an upper end thereof, and a connector housing disposed at a lower end of the cover. The cover may include a cover body having a disc shape. Reverse rotation prevention protrusions protruding outward may be formed at intervals at a plurality of positions on an outer circumference of the cover body. Rotation guide protrusions may protrude from the plurality of positions of the cover body, and corners thereof may be formed in a predetermined curvature. The rotation guide protrusions may be formed to correspond to the number of rotation locking parts formed on an outer wall of the holder.