Seatback Airbag Bracket Layout for Outer Shape and Assembly Access
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Solution Overview
Problem
Existing vehicle seat designs with airbag modules face challenges in forming the outer shape of the seatback as intended, leading to increased weight and difficulty in accessing fastening points, which complicates the assembly and integration of the airbag module.
Innovation Solution
A vehicle seat design featuring a shape former coupled to the seatback frame with gap spaces between the frame and the shape former, allowing for the formation of the outer shape and enabling easier access to fastening points for assembling the airbag module, along with a bracket system for secure coupling of the airbag module to the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If an airbag module is provided on the side frame without the expansion section, then the seatback weight is reduced, but the outer shape of the seatback cannot be formed as intended
Solution Approach 1:
The invention divides the seatback structure into separate functional components: the frame bracket coupled to the side frame, the module bracket supporting the airbag module, and the shape former forming the outer shape. This segmentation allows each component to perform its specific function independently, enabling weight reduction while maintaining the desired outer shape.
Solution Approach 2:
The shape former acts as an intermediary component between the frame bracket and the outer surface. It is coupled to the side frame and forms the outer shape of the seatback, while the airbag module is mounted on the frame bracket. This intermediary structure allows the airbag module to be positioned without compromising the outer shape design.
2Shape
If the expansion section is added to the back panel to form the outer shape, then the outer shape of the seatback can be formed as intended, but the seatback weight increases
Solution Approach 1:
The invention extracts the shape-forming function from the structural frame components and assigns it to a dedicated shape former component. The expansion section is removed from the back panel, and the shape former is coupled to the side frame instead. This extraction allows the frame structure to be simplified and lightened while the shape former maintains the desired outer shape.
Solution Approach 2:
The shape former is positioned locally at the outer perimeter of the seatback, where it is needed to define the outer shape. The internal frame structure can then be optimized for strength and weight independently, allowing different parts of the seatback to have different structural qualities appropriate to their specific functions.
3Device complexity
If the airbag module is fastened directly to the side frame, then the assembly structure is simplified, but the fastening points become difficult to access
Solution Approach 1:
The invention introduces a third dimension by positioning the fastening points at the rear of the module bracket, which is accessible from the rear side of the seatback. The shape former is configured to allow access to these rear fastening points, creating a spatial arrangement where assembly operations can be performed from the rear rather than requiring access from the front or sides.
Data Source
AI summary
[Problem to be solved] To provide a vehicle seat that enables an airbag module to be fastened to an outer frame of a seatback frame, while enabling the outer shape of a seatback to be formed as intended.[Solution] A vehicle seat 1 comprises an outer frame (seatback frame outer portion 19) forming a framework of a seatback 5, a frame bracket 34 coupled to a left or right side part of the outer frame, a module bracket 36 fastened to the frame bracket for supporting an airbag module, a shape former 80 coupled to the side part of the outer frame to form an outer shape of the seatback, wherein gap spaces are formed between the outer frame and the shape former, and the frame bracket and the module bracket are fastened to each other at fastening points frontward of the gap spaces.