Vehicle Seat Sensor Wiring Layout in Pad Through-Hole Recess
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Solution Overview
Problem
In vehicle seats, especially rear seats, there is inadequate space on the back side of the seat cushion and seat back to accommodate wire harnesses for seat sensors due to support by the vehicle body panel, leading to installation challenges and potential interference with other components.
Innovation Solution
A vehicle seat design that includes a panel-supported pad with a through hole and recess to accommodate the wire harness, allowing it to be positioned on the back surface of the pad, and a flexible sheet material with pressure-sensitive switches arranged in specific configurations to minimize erroneous detections and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the pad is supported by the vehicle body panel, then the structural stability is improved, but the space on the back side of the pad for placing wire harness is reduced
Solution Approach 1:
The wire harness passage extends in the thickness direction of the pad, utilizing the Z-axis dimension to route the wire harness through the pad rather than requiring lateral space on the back surface. This allows the wire harness to pass through the pad thickness without compromising the structural support function.
Solution Approach 2:
The wire harness is nested within a passage formed inside the pad structure itself. The passage is integrated into the pad's internal architecture, allowing the wire harness to be contained within the pad's volume rather than requiring external space on the back surface.
2Measurement precision
If pressure-sensitive switches are arranged in pairs to detect seating, then the detection accuracy is improved, but the complexity of sensor arrangement increases
Solution Approach 1:
The sensor system is divided into multiple independent sensor units, each consisting of a pair of pressure-sensitive switches. Each sensor unit independently detects seating in its specific region, allowing for modular arrangement and simplified wiring while maintaining high detection accuracy through the paired switch configuration.
Solution Approach 2:
Multiple sensor units with paired switches are distributed across different seating regions (front, middle, rear). This excessive arrangement of sensor pairs ensures that seating detection is achieved regardless of where the occupant sits, providing redundant detection coverage that maintains accuracy while allowing flexible spatial arrangement.
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
The design provides a secure space for wire harnesses, minimizes interference with other components, and accurately detects seat occupancy without erroneous readings, even with varying occupant stature and seating positions.
Implementation Method 1
The pressure sensor is a sensor that detects the pressure applied to the seating surface of the seat cushion
Implementation Method 2
a plurality of pressure-sensitive switches arranged in a seating region of a vehicle seat, and configured to turn on by the seating of an occupant
Data Source
AI summary
A wire harness connected to a sensor is positioned on a back surface of a pad of a vehicle seat supported by a panel. The vehicle seat includes a panel; a pad supported by the panel; a skin material covering a front surface of the pad; and a sensor provided between the front surface of the pad and the skin material for acquiring information on a seat occupant, wherein the pad is provided with a through hole passed from the front surface of the pad to a back surface of the pad, and a recess formed in the back surface of the pad and connected to the through hole, the wire harness connected to the sensor extending in the through hole and the recess.