Vehicle Seat Slide Position Sensor Vibration Stability

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Solution Overview

Problem

Existing seat slide position detection devices for vehicles are prone to accuracy deterioration due to vibrations caused by vehicle movement, as the vertical wall and plate components are supported in a cantilever manner by fixed and movable rails, leading to potential deformation and reduced detection accuracy.

Innovation Solution

A seat slide position detection device with a position sensor attached to the movable rail, featuring a protrusion in contact with the rail and a positioning section locked by the seat cushion frame, stabilizes the detection accuracy by providing secure attachment and precise alignment, even under vehicle vibrations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the position sensor is attached to the movable rail with a cantilever-supported vertical wall portion and plate, then the detection structure is simple, but the accuracy of detecting the seat slide position deteriorates due to deformation from vibrations

Engineering Contradiction:

Improvedetection structureVSAvoidseat slide position detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The position sensor is divided into two separate attachment points: one end is fixed to the movable rail via a support portion, and the other end is locked by the seat cushion frame to form a positioning section. This segmentation prevents the sensor body from deforming under vibration while maintaining structural simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The support portion and positioning section are combined to form a unified attachment system that integrates both support and positioning functions. This merging ensures the position sensor remains stable and accurately positioned without requiring a complex rigid structure.

Inventive Principle:

Principle #5Merging (Combining)

2Measurement precision

If the position sensor is securely attached to the movable rail with a positioning section, then the accuracy of detecting the seat slide position is stabilized, but the device complexity increases

Engineering Contradiction:

Improveseat slide position detection accuracyVSAvoidposition sensor attachment structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The positioning section utilizes the existing seat cushion frame structure to lock the position sensor, rather than requiring a separate complex positioning mechanism. This self-service approach achieves stable positioning by leveraging components already present in the seat assembly.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The seat cushion frame serves multiple functions: it supports the seat cushion and simultaneously acts as a positioning element for the position sensor. This multi-functionality reduces the need for additional dedicated positioning components, maintaining device simplicity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS9067513B2Seat slide position detection device for vehicle

Publication Date: 2015.06.30 HONDA MOTOR CO LTD

AI summary

A seat slide position detection device for a vehicle includes: a fixed rail attached to a vehicle floor; a movable rail supported to the fixed rail slidably in a longitudinal direction of the fixed rail; a detected portion disposed in a predetermined area of the fixed rail extending in the longitudinal direction; and a position sensor attached to the movable rail and having a sensor detector in a position of the position sensor opposed to the detected portion. The position sensor includes a protrusion attached to the movable rail with an extremity portion of the protrusion in contact with the movable rail.