Rotating Seat Locking Pin Structure for Collision-Stable Coupling
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Solution Overview
Problem
Existing vehicle seats lack the ability to be freely rotatable while maintaining sufficient coupling rigidity with the vehicle body, especially during vehicle collisions, which is crucial for passenger safety.
Innovation Solution
A rotating seat design featuring locking pins that extend longitudinally, with an inner plate accommodating these pins and an outer plate having fixing grooves, allowing selective insertion and rotation through a lever mechanism and torsion spring connection, ensuring stable coupling and rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seat is made rotatable to provide various adjustable seating positions, then the versatility and functionality of the seat is improved, but the coupling rigidity and stability with the vehicle body deteriorates
Solution Approach 1:
The seat coupling system employs a dynamic locking mechanism that transitions between locked and unlocked states. The locking pin can be selectively positioned to engage or disengage from the fixing groove, allowing the seat to switch between a stable fixed state and a rotatable adjustable state. This dynamic state change resolves the contradiction by providing both stability when needed and versatility when required.
Solution Approach 2:
The coupling rigidity parameter is changed by the engagement state of the locking pin. When the locking pin engages with the fixing groove, the coupling rigidity is high providing stability. When the locking pin is repositioned or disengaged, the coupling rigidity decreases allowing rotation. This parameter change enables the system to meet both stability and versatility requirements at different operational phases.
2Reliability
If the locking mechanism is added to control seat rotation, then the stability and safety during collisions is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is segmented into distinct functional components: a locking pin for engagement, a fixing groove for positioning, and a control element for actuation. This segmentation allows each component to perform its specific function simply and reliably, reducing overall complexity while maintaining safety. The locking pin and groove together provide the necessary safety function without requiring a complex integrated mechanism.
3Ease of operation
If multiple locking pin fixing grooves are provided for selective insertion, then the ease of operation for rotation is improved, but the device complexity increases
Solution Approach 1:
The locking pin is designed with universal functionality to engage with any of the multiple fixing grooves. The pin's geometry and the grooves' configuration are standardized, allowing the same locking pin to securely engage with different grooves at different positions. This multi-functionality enables easy rotation control through selective engagement without requiring different locking mechanisms for each position, thus avoiding increased 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 enables free rotation of the seat while maintaining robust coupling with the vehicle body, enhancing passenger safety by preventing unwanted rotation during collisions and reducing vibration transmission.
Implementation Method 1
torsion spring connection
Data Source
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AI summary
A vehicular rotatable seat may include locking pins each extending in a longitudinal direction, an inner plate configured to allow the seat to be coupled to an outer side thereof, the inner plate accommodating the locking pins on an inner side thereof, and an outer plate configured to rotatably accommodate the inner plate on an inner side thereof, wherein the outer plate has a plurality of locking pin fixing grooves respectively formed in a plurality of locations thereof and configured to fix the locking pins, wherein one end of each of the locking pins is inserted into a corresponding one of the locking pin fixing grooves, and the locking pins are selectively inserted, by rotation of the inner plate, into a part of the plurality of locking pin fixing grooves.