Seat Belt Retractor Angle Compensation for Adjustable Vehicle Seats
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Solution Overview
Problem
Existing seat belt retractor systems fail to function properly when the relative position between the seat cushion and backrest changes, such as in seats with adjustable inclination or height, causing the vehicle sensing device to deviate from the vertical orientation and preventing normal seat belt operation.
Innovation Solution
A control assembly comprising first and second electric motors, a control module, and a third electric motor, which collect and compensate for angle changes in the seat belt retractor using Hall sensors to maintain the vehicle sensing device in a vertical orientation during seat adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seat cushion and backrest are adjusted independently, then the seat comfort and adaptability are improved, but the vehicle sensing device deviates from vertical orientation causing seat belt malfunction
Solution Approach 1:
The control module receives feedback signals from the first and second electric motors indicating their rotation states, processes this information to determine the current seat configuration, and automatically adjusts the third electric motor to compensate for any deviation of the vehicle sensing device from vertical orientation. This closed-loop feedback mechanism ensures the seat belt system remains reliable regardless of seat adjustment flexibility.
Solution Approach 2:
The patent replaces the traditional mechanical linkage system with an electrical control system using multiple electric motors and a control module. Instead of relying on pure mechanical connections between the seat components and the retractor, the system uses electrical signals and electronic control to achieve the same functional goal of maintaining proper sensing device orientation.
2Ease of operation
If the backrest angle is adjusted, then the seating comfort is improved, but the vehicle sensing device rotates away from vertical position
Solution Approach 1:
The system dynamically changes the orientation parameter of the vehicle sensing device by controlling the third electric motor to rotate and compensate for backrest angle changes. The control module calculates the required compensation based on the rotation signals from the first and second motors, adjusting the sensing device's angular position to maintain vertical orientation despite backrest adjustments.
3Adaptability or versatility
If the seat cushion inclination is adjusted, then the user comfort is improved, but the relative position change between cushion and backrest causes sensing device misalignment
Solution Approach 1:
The control module continuously monitors the rotation status of the first and second electric motors through feedback signals, determining when the seat cushion inclination or backrest position changes. Based on this feedback, the control module automatically activates the third electric motor to realign the vehicle sensing device, maintaining measurement precision while allowing full seat adjustability.
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
Ensures normal operation of the seat belt by maintaining the vehicle sensing device's vertical orientation during full seat adjustments, including inclination and height changes, through real-time compensation by the third electric motor.
Implementation Method 1
A control assembly for a seat belt retractor and a vehicle seat are provided, comprising a first electric motor, a second electric motor, a control module, a third electric motor and a retractor
Data Source
AI summary
Provided is a control assembly (3) for a seat belt retractor, the control assembly comprising a first electric motor (31), a second electric motor (32), a control module (33), a third electric motor (34) and a retractor (35), wherein the control module (33) is separately connected to the first electric motor (31), the second electric motor (32) and the third electric motor (34), and collects rotation signals of the first electric motor (31) and the second electric motor (32) and outputs a compensation signal to the third electric motor (34); the rotation of the first electric motor (31) and the rotation of the second electric motor (32) are both related to the angle of the retractor (35); and the third electric motor (34) is connected to the retractor (35) and directly compensates the angle of the retractor (35).