Seat Back Pressure-Receiving Linkage for Cornering and Rear Impact
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Solution Overview
Problem
Conventional vehicle seats face challenges in simultaneously supporting occupants during cornering and reducing neck impact in rear-end collisions, requiring space-consuming mechanisms that limit design freedom and increase size, with difficulty in precise regulation of link member rotation and smooth operation of movable parts.
Innovation Solution
A vehicle seat design featuring a pressure-receiving member with a driving mechanism that includes a linkage and a driving source, allowing the pressure-receiving member to move forward during cornering and rearward in collisions, eliminating the need for separate orientation and movement mechanisms, and incorporating a rotation resistive member to control rearward rotation, ensuring smooth operation and precise regulation of link member rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate mechanisms are provided for changing seat back orientation and for rearward movement of pressure-receiving member, then both cornering support and collision protection functions are achieved, but the mechanisms occupy large space within the seat back and limit design freedom
Solution Approach 1:
The patent combines the cornering support mechanism and the collision protection mechanism into a single integrated pressure-receiving member that can perform both functions. The pressure-receiving member is configured to tilt forward during cornering and move rearward during collision, eliminating the need for separate mechanisms and reducing space occupation within the seat back.
Solution Approach 2:
The pressure-receiving member is designed as a multi-functional component that serves both as a cornering support structure and a collision protection device. By enabling this single component to perform multiple functions through different movement modes (tilting forward for cornering, moving rearward for collision), the patent reduces overall device complexity while maintaining reliable occupant support.
2Ease of operation
If the amount of rotation of link member is regulated by controlling actuation and stoppage of driving source, then the mechanism can be controlled, but it is difficult to precisely regulate the rotation amount
Solution Approach 1:
The patent replaces the conventional control method based on driving source actuation and stoppage with a mechanical stop mechanism. The stop member physically limits the rotation of the link member to a predetermined angle, providing precise regulation of the pressure-receiving member's tilt angle without relying on complex control systems, thereby achieving both ease of operation and measurement precision.
3Volume of moving object
If various parts such as link member and driving source are arranged in limited space, then the seat structure is compact, but it is difficult to arrange parts and suppress increase in size
Solution Approach 1:
The patent segments the seat back structure into distinct functional zones: the pressure-receiving member, the link member mechanism, and the driving source are arranged in separate spatial regions. This segmentation allows for optimized placement of each component within the limited space, reducing arrangement complexity while maintaining a compact overall structure.
Data Source
AI summary
The object of the invention is to provide a vehicle seat which can improve degree of freedom in the design of the vehicle seat. A vehicle seat with a seat cushion and a seat back includes: right and left side frames 20 constituting right and left frames of the seat back; a pressure-receiving member 40 disposed between the right and left side frames 20 and configured to receive a load from an occupant; and a driving mechanism 50 disposed at each of right and left sides of the pressure-receiving member 40 and configured to cause a right end portion or a left end portion of the pressure-receiving member 40 to move from an initial position to an advanced position that is located frontward of the initial position or to move from the advanced position to the initial position, wherein the driving mechanism 50 includes a linkage (drive link member 100 and contact link member 200) configured to be connected to the pressure-receiving member 40 and a driving source 52 configured to actuate the linkage, and wherein the linkage is configured to operate when a load equal to or greater than a predetermined amount is input from the occupant to the pressure-receiving member 40 to cause the pressure-receiving member 40 to move to a backward position that is located rearward of the initial position.