Rotatable Vehicle Seat Locking Structure for Collision Stability
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Solution Overview
Problem
Existing vehicular seats lack the ability to be freely rotatable while ensuring passenger safety and stable coupling to the vehicle body, particularly during vehicle collisions.
Innovation Solution
A rotatable vehicular seat design featuring locking pins, an inner and outer plate with fixing grooves, and a locking pin bracket system that allows for controlled rotation and secure fixation, utilizing a lever rod and torsion springs for unlocking and locking mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seat is designed to be freely rotatable, then the versatility and adjustability of the seat is improved, but the stability and safety during vehicle collision deteriorates
Solution Approach 1:
The locking pin system transitions between locked and unlocked states dynamically. During normal operation, the locking pins are retracted to allow free rotation of the inner plate. During collision, the locking pins automatically engage with the locking pin fixing grooves to provide stable coupling, thus adapting the system's rigidity based on operational conditions.
Solution Approach 2:
The locking pins are pre-positioned within the inner plate, ready to engage with the locking pin fixing grooves on the outer plate. The guide protrusions are pre-configured to guide the locking pins into the correct engagement positions, ensuring that when collision occurs, the locking mechanism is already prepared to provide immediate stabilization.
2Reliability
If locking mechanisms are added to ensure safety, then the reliability during collision is improved, but the device complexity increases
Solution Approach 1:
The locking pin bracket integrates multiple functions into a single component: it holds both locking pins, provides guide protrusions for alignment, and connects to the lever rod for actuation. The lever rod itself serves dual purposes as both the actuating mechanism and the connection element between the locking pin bracket and the inner plate, reducing the overall number of separate components.
Solution Approach 2:
The locking pins serve multiple functions: they act as locking elements when engaged with the locking pin fixing grooves, guide elements through their guide protrusions, and connection points for the locking pin bracket. The outer plate's locking pin fixing grooves also serve as both locking receptacles and guide pathways, eliminating the need for separate guide structures.
3Strength
If multiple locking pins are used to secure the seat, then the coupling rigidity is improved, but the ease of operation for rotation deteriorates
Solution Approach 1:
The locking pins automatically engage with the locking pin fixing grooves when the inner plate rotates to specific positions, without requiring manual intervention. The guide protrusions self-align with the locking pin fixing grooves during rotation, guiding the locking pins into engagement positions automatically. This eliminates the need for separate locking actions while maintaining strong coupling.
Solution Approach 2:
The lever rod acts as an intermediary that translates a single user action (pulling the lever) into the coordinated movement of both locking pins. When the lever rod is pulled, it simultaneously retracts both locking pins from their engaged positions, allowing rotation. This simplifies the user interface while maintaining control over the dual locking pin system.
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
Enables free rotation of the seat for various positions while maintaining passenger safety by preventing unwanted rotation during travel and securing the seat to the vehicle body, even under impact.
Implementation Method 1
a locking pin bracket disposed on the inner plate, wherein the locking pin bracket includes a first end and a second end respectively connected to the pair of locking pins
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A rotatable vehicular seat comprises a seat portion, a pair of locking pins disposed to face each other, each of the locking pins configured to extend in a longitudinal direction thereof, an inner plate coupled to the seat portion and configured to accommodate the pair of locking pins therein, an outer plate configured to rotatably accommodate the inner plate, the outer plate comprising a plurality of locking pin fixing grooves, and one end of each of the locking pins configured to be inserted into a corresponding one of the locking pin fixing grooves, and a locking pin bracket disposed on the inner plate. The locking pin bracket includes a first end and a second end respectively connected to the pair of locking pins.