Vehicle Seat Cushion Impact Absorber Layout for Narrower Frames
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle seats require an increase in seat cushion frame width to accommodate impact-absorbing members, which is undesirable for space and design considerations.
Innovation Solution
A conveyance seat design featuring a seat cushion with an impact-absorbing member supported from below by a plate-shaped member, positioned between side frames, and partially accommodated in recessed portions of the seat cushion pad and support member, to absorb impacts without increasing the seat's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cross member is placed on the seat cushion frame to absorb impact, then the impact absorption effect is improved, but the width of the seat cushion frame must be increased
Solution Approach 1:
The impact absorbing member is moved from a horizontal placement on the seat cushion frame to a vertical placement below the seat cushion pad. This dimensional change allows the impact absorbing function to be integrated into the vertical stack of the seat cushion without requiring additional horizontal width, thus resolving the contradiction between impact absorption effectiveness and seat width constraints.
Solution Approach 2:
The impact absorbing member is nested within the existing seat cushion structure by positioning it below the seat cushion pad and between the side frames. This nesting approach allows the impact absorbing component to occupy space that would otherwise be unused, eliminating the need to increase the overall seat width while maintaining effective impact absorption.
2Length of stationary object
If the impact absorbing member is positioned below the seat cushion pad between side frames, then the seat width is reduced, but the support stability must be maintained
Solution Approach 1:
The support member is designed with a localized recessed portion that specifically engages with the impact absorbing member. This localized structural feature provides targeted support and positioning stability exactly where needed, rather than requiring universal reinforcement of the entire seat structure, thus maintaining stability while keeping the overall design compact.
Solution Approach 2:
A support member is introduced as an intermediary component between the seat cushion frame and the impact absorbing member. This intermediary element provides the necessary support and stability for the impact absorbing member in the constrained space below the seat cushion pad, resolving the contradiction between compact width and support stability.
3Stability of the object's composition
If the impact absorbing member is accommodated in recessed portions, then the position stability is improved, but the structure complexity increases
Solution Approach 1:
The recessed portions for accommodating the impact absorbing member are integrated directly into the support member and seat cushion pad structures. By merging the positioning function into existing structural elements rather than adding separate positioning mechanisms, the design achieves position stability while minimizing increases in overall structural 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
The design effectively absorbs impacts while maintaining a compact seat size, stabilizing the impact-absorbing member's position and reducing influences from sinking suppression and sensor members, ensuring stable load transmission and improved impact absorption.
Implementation Method 1
an impact absorbing member provided below the seat cushion pad... when a load during impact absorption is transmitted to the impact absorbing member
Data Source
AI summary
Provided is a conveyance seat in which an increase in size is suppressed while an impact to be applied to a seated occupant when an impact such as a collision is generated is properly absorbed. A vehicle seat includes a seat cushion. The seat cushion includes a seat cushion frame including a pair of side frames provided to be separated from each other in a width direction of the vehicle seat, a seat cushion pad placed on the seat cushion frame, and an impact absorbing member provided below the seat cushion pad. The impact absorbing member is disposed between the pair of side frames in the width direction of the vehicle seat. The impact absorbing member is provided with a cavity portion. The impact absorbing member is supported from below by a plate-shaped member.