Vehicle Seat Side Airbag Bracket for Back-Side Assembly
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Solution Overview
Problem
The existing vehicle seat designs with side airbag modules have low workability when attaching the airbag module from the seat back side to the seat frame, due to the placement and attachment methods used.
Innovation Solution
The vehicle seat incorporates a side frame with a bracket that includes an attachment portion on the inner side surface and a back protrusion portion, allowing the airbag module to be fixed to the back protrusion portion, which improves workability by providing a compact attachment width and preventing interference between attachment positions, while also ensuring strong attachment to the seat cushion frame and maintaining shock absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the airbag module is attached to a bracket extending from the side frame toward the seat front side, then the airbag module can be securely attached to the seat frame, but the workability when attaching the airbag module from the seat back side is low
Solution Approach 1:
The bracket is inverted so that the airbag module attachment portion extends backward from the side frame toward the seat back side, rather than extending forward. This allows the airbag module to be attached from the seat back side, significantly improving workability and ease of assembly operations.
Solution Approach 2:
The bracket is designed with a multi-dimensional structure including a horizontal portion extending from the side frame, a vertical portion extending downward, and an airbag module attachment portion extending backward. This three-dimensional configuration allows attachment from the seat back side while maintaining secure connection to the seat frame.
2Device complexity
If the bracket extends from the side frame toward the seat front side, then the attachment structure is simplified, but the width of the attachment portion in the right and left direction increases
Solution Approach 1:
Instead of extending the bracket toward the seat front side, the airbag module attachment portion is inverted to extend backward toward the seat back side. This orientation change reduces the width of the attachment portion in the right and left direction while maintaining structural simplicity.
3Strength
If the bracket is attached at a position overlapping the joint portion between the pipe frame and plate frame, then the attachment strength is improved, but the rigidity of the side frame increases excessively
Solution Approach 1:
The bracket is attached to a specific location on the side frame that is below the joint portion between the pipe frame and plate frame. This localized attachment position provides sufficient attachment strength for the airbag module while avoiding excessive rigidity increase in the side frame structure.
Data Source
AI summary
To improve workability when attaching an airbag module disposed in a side portion of a vehicle seat from a seat back side. A vehicle seat (S) includes: a side frame (13) which constitutes a side portion of a seat back frame (10); a bracket (20) which includes an attachment portion (21) attached to a side surface of the side frame (13) on a seat inner side and a back protrusion portion (22) protruding backward from the attachment portion (21); and an airbag module (30) which includes a retainer (34) fixed to the back protrusion portion (22).