Seat support mechanism
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Solution Overview
Problem
Existing seat support mechanisms for vehicles require complex operations and large numbers of parts to change the seat's direction, leading to increased complexity, cost, and limited design freedom, especially when trying to avoid interference with vehicle walls.
Innovation Solution
A seat support mechanism with a leg pedestal, a moving pedestal that can be advanced/retracted, and an underframe that is turnably supported by a turning shaft, where the interlocking mechanism converts turning motion into linear motion to change the seat's direction without interference, using a guide rail and rollers to facilitate movement and locking mechanisms to restrain the seat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seat is installed away from the side wall to avoid interference during turning, then the seat can be turned without interference, but the gap between the seat and side wall increases, narrowing the aisle width and reducing space utilization
Solution Approach 1:
The patent applies dynamics by making the pedestal movable rather than fixed. The pedestal can dynamically adjust its position between a retracted state (when the seat is longitudinally directed) and an extended state (when the seat is crosswise directed), allowing the seat to turn close to the side wall without interference while maximizing aisle width and space utilization.
2Reliability
If a second movable frame is slid forward with respect to a first movable frame to secure sufficient turning radius, then the seat can be turned, but the number of parts increases, making the configuration intricate and costs increase
Solution Approach 1:
The patent merges the pedestal and the turning mechanism into a single integrated structure. The pedestal itself serves as both the support structure and the mechanism for providing turning radius, eliminating the need for separate first and second movable frames. This reduces the number of parts while maintaining the sufficient turning radius needed for seat rotation.
3Adaptability or versatility
If three different operations of forward sliding, turning, and return sliding are performed separately to change over the directed state of a seat, then the seat direction can be changed, but the operations become extremely complicated and troublesome, increasing the change-over time
Solution Approach 1:
The patent applies preliminary action by automatically performing the forward sliding of the pedestal before the seat turning operation. When the seat is being turned from longitudinal to crosswise direction, the pedestal proactively extends forward to clear the path, eliminating the need for separate manual operations. This reduces operational complexity and changes the seat direction more efficiently.
4Volume of moving object
If the fixed frame, sliding frame, and seat are laid one over another, then the structure is compact, but it is difficult to directly lock the seat with the fixed frame, requiring the sliding frame to be interposed, reducing design freedom for locking
Solution Approach 1:
The patent extracts the locking function from the intermediate sliding frame and implements it directly between the pedestal and seat. The locking mechanism is provided on the pedestal itself, allowing direct locking of the seat without requiring the sliding frame to be interposed. This maintains structural compactness while significantly increasing design freedom for the locking mechanism.
Data Source
AI summary
A seat support mechanism including a leg pedestal (11), which is fixedly provided on a floor in the vicinity of a side wall (A), a moving pedestal (20), which is disposed under a top face part (12) of the leg pedestal (11) and is capable of being advanced/retracted in a direction orthogonal to the side wall A; an underframe (30) of the seat, which is disposed above the top face part (12) of the leg pedestal (11), and is turnably supported by a turning shaft (41) in the moving pedestal (20), the turning shaft (41) avoiding an interference with the top face part (12), and an interlocking mechanism (50), which interlocks turning and advancing/retracting of the underframe (30), in which, when the seat is turned together with the underframe (30), the interlocking mechanism (50) converts the turning motion of the underframe (30) into a linear motion and, through the turning shaft (41), transmits it to the moving pedestal (20), thereby causing the moving pedestal (20) and the underframe (30) to be advanced/retracted in a direction orthogonal to the side wall (A).