Seat-Interlocking Leg Rest Control for Collision Prevention
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Solution Overview
Problem
Conventional leg rest devices in vehicles are prone to damage due to collisions with other vehicle parts when the seat moves in the forward-backward or upward-downward direction, leading to potential damage to the leg rest or actuator.
Innovation Solution
A seat-interlocking leg rest control system that includes actuators and a controller to limit the rotation angle of the leg rest based on the seat's position, using sensing units to detect motor revolutions and adjust the actuator operations to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the leg rest is allowed to rotate freely to improve occupant comfort, then the leg rest can achieve a larger rotation angle range, but the leg rest may collide with other vehicle parts causing damage
Solution Approach 1:
The leg rest rotation angle is dynamically adjusted based on the seat position. When the seat is in a forward position, the leg rest rotation angle is limited to prevent collision with the dashboard. When the seat is in a rearward position, the leg rest can rotate to a larger angle for improved comfort. This dynamic adjustment resolves the contradiction between rotation range and collision prevention.
Solution Approach 2:
The control system continuously monitors the seat position and adjusts the leg rest rotation angle accordingly. The controller receives feedback about the seat position from sensors and automatically limits the leg rest rotation when the seat is in a forward position, preventing collision while maintaining comfort when the seat is in a rearward position.
2Reliability
If the seat position is monitored and leg rest rotation is limited to prevent collision, then damage to vehicle parts is prevented, but the system complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The control system integrates multiple functions into a single controller that manages both the seat position monitoring and the leg rest rotation control. This multi-functional approach reduces the need for separate dedicated components and simplifies the overall system architecture while maintaining reliable collision prevention.
Solution Approach 2:
The system automatically adjusts the leg rest rotation angle based on the detected seat position without requiring manual intervention from the occupant. The control system self-regulates the rotation limit based on real-time seat position feedback, eliminating the need for additional manual controls or complex user interfaces.
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
Prevents damage to the leg rest and other vehicle parts by controlling the rotation angle of the leg rest within a limited range, ensuring safe operation and minimizing malfunctions.
Implementation Method 1
Each of the first drive motor and the second drive motor may be provided with a Hall sensor. The sensing unit may sense rotation of the first drive motor and the second drive motor using the Hall sensor.
Data Source
AI summary
A seat-interlocking leg rest control system includes: a first actuator configured to move a seat for a vehicle, the seat including a seat cushion and a seatback, in a forward-backward direction or an upward-downward direction of the vehicle; a second actuator configured to rotate a leg rest, rotatably coupled to the front end portion of the seat cushion, in the upward-downward direction; and a controller connected to the first actuator and the second actuator to control operation of the second actuator such that the rotation angle of the leg rest is limited based on the position of the seat.