Integral Sensor Bracket for Vehicle Seat Position Detection
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Solution Overview
Problem
Existing vehicle seats with sliding functions lack effective sensors to detect the full-forward position and control seat belt pulling force based on seat position, compromising seating comfort and safety.
Innovation Solution
A vehicle seat with an integral bracket mounting a magnetic sensor and limit switch to detect the full-forward position and seat position, allowing for controlled seat belt force adjustment and enhanced comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate sensors are used for detecting full-forward position and seat position, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the limit switch for detecting full-forward position and the magnetic sensor for detecting seat position into a single integrated sensor assembly mounted on the slide rail. This merging of multiple sensing functions into one unified structure reduces device complexity while maintaining the reliability of both detection functions through their complementary operating principles.
Solution Approach 2:
The sensor assembly serves multiple functions: the limit switch detects the full-forward position of the slide rail, the magnetic sensor detects the seat position for seatbelt force control, and together they enable both the walk-in function and comfortable seating function. This multi-functionality allows a single assembly to replace what would otherwise require separate sensing systems.
2Measurement precision
If magnetic sensor is used for detecting seat position, then measurement precision is improved, but susceptibility to external interference increases
Solution Approach 1:
The patent introduces a magnetic body attached to the slide rail as an intermediary element that the magnetic sensor detects. This intermediary allows the sensor to measure seat position indirectly through magnetic field interaction rather than direct contact, improving measurement precision while the non-contact nature of magnetic detection reduces susceptibility to mechanical interference from passenger feet or other external factors.
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
Reliably detects the full-forward position and adjusts seat belt force for improved seating comfort and safety, ensuring stable detection even with passenger foot contact.
Implementation Method 1
an integral sensor bracket mounted with a magnetic sensor and a limit switch is secured to the slide rail, and a magnetic body to be detected by the magnetic sensor
Implementation Method 2
a detection plate for actuating the limit switch are mounted to the stationary rail
Data Source
AI summary
Provided is a vehicle seat (100) comprising: a seat cushion (101); a seat back (102) capable of being folded toward the seat cushion (101); a slide rail (110) movable in the front-back direction with the seat cushion (101) mounted thereon; a stationary rail (120) for guiding the slide rail (110); and a drive motor (160) for driving the slide rail (110) in the front-back direction along the stationary rail (120). The vehicle seat (100) is configured such that an integral sensor bracket (130) on which a magnetism sensor (141) and a limit switch (151) are mounted is affixed to the slide rail (120), and a magnetic body (142) which is detected by the magnetism sensor (141) and a detection plate (153) which activates the limit switch (151) are mounted to the stationary rail (120).