Vehicle Seat Back Frame Motor and Retra
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle seat designs with retractors and motors positioned inside the seat cushion or lower back portion result in increased inflection points in the webbing, leading to higher frictional resistance and aesthetic design limitations, while positioning these components uppermost reduces inflection points but may compromise flexibility and comfort.
Innovation Solution
A vehicle seat design where the motor, gear, take-up device, and pre-tensioner component are mounted on the upper portion of the seat back frame, minimizing inflection points and bulging, while maintaining flexibility in aesthetic design and occupant comfort by strategically positioning these components along the seat back frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the retractor and motor are disposed inside the seat cushion or lower back portion, then the seat can provide restraint function, but the webbing has numerous inflection points causing large frictional resistance
Solution Approach 1:
The patent relocates the retractor and motor from the lower dimension (seat cushion or lower back) to the upper dimension (upper portion of seat back), changing the spatial arrangement to reduce webbing inflection points and frictional resistance while maintaining restraint functionality
2Force
If the retractor and motor are disposed in the upper portion of the seat back, then there are fewer inflection points in the webbing, but the design surface of the upper portion of the seat back bulges
Solution Approach 1:
The patent nests the retractor and motor within the seat back frame structure, integrating these components into the existing framework rather than adding them as external protrusions, thereby minimizing impact on the design surface while maintaining their functional benefits
3Device complexity
If the pre-tensioner component is disposed at the front face side of the seat back frame, then the structure is compact, but heat from activation may be transmitted to the seat occupant
Solution Approach 1:
The patent inverts the conventional arrangement by placing the pre-tensioner component at the back face side instead of the front face side of the seat back frame, reversing the spatial relationship to distance the heat-generating component from the occupant while maintaining structural integrity
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 allows for smoother webbing extraction, reduced frictional resistance, improved aesthetic flexibility, and enhanced comfort by minimizing bulging and heat transmission to the occupant, while maintaining effective restraint performance.
Implementation Method 1
a pre-tensioner component arranged along the seat back frame adjacent to the take-up device, the pre-tensioner component forcibly rotating the spool when activated
Implementation Method 2
a gear arranged along the seat back frame adjacent to the motor, the gear transmitting driving force from the motor
Implementation Method 3
the take-up device being provided with a spool onto which a webbing is wound
Data Source
AI summary
A vehicle seat includes a seat back, a motor, a gear, a take-up device and a pre-tensioner component. The seat back extends in a seat vertical direction and supports the back area of a seat occupant. A seat back frame structures a framework of the seat back. The motor is mounted to an upper portion of the seat back frame. The gear is arranged along the seat back frame adjacent to the motor and transmits driving force from the motor. The take-up device is arranged along the seat back frame adjacent to the gear, and is provided with a spool onto which a webbing is wound. Driving force from the motor is transmitted to the take-up device via the gear. The pre-tensioner component is arranged along the seat back frame adjacent to the take-up device. When activated, the pre-tensioner component forcibly takes up the spool.