Seat Cushion Switch Actuator for Ignition Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing seat assemblies in off-highway vehicles do not effectively integrate a mechanism to automatically control the ignition system based on the presence or absence of an operator, leading to potential unauthorized vehicle operation.
Innovation Solution
A seat assembly with a switch actuator mounted to the seat cushion that moves between actuating and non-actuating positions in response to the operator's seating, allowing the switch to open or close the ignition circuit accordingly, ensuring the ignition system is only operational when the operator is seated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a switch actuator is integrated into the seat cushion to automatically control the ignition system, then safety and security are improved, but device complexity increases
Solution Approach 1:
The switch actuator is nested within the seat cushion structure, specifically mounted to the lower surface of the seat cushion within a cavity. This integration allows the actuator to be part of the seat assembly without adding external complexity, while still providing automatic ignition control when the operator sits on the seat.
Solution Approach 2:
The seat cushion serves multiple functions: it provides seating comfort and simultaneously houses the switch actuator mechanism that controls the ignition system. The actuator is mounted to the lower surface of the seat cushion and works together with the switch assembly to provide automatic engine start control based on operator presence.
2Ease of operation
If the switch actuator is mounted within the seat cushion cavity, then ease of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The switch actuator is positioned within a cavity formed in the lower surface of the seat cushion. This nesting approach allows the actuator to be integrated into the seat structure while maintaining proper alignment and spacing, reducing the need for high-precision external mounting.
Solution Approach 2:
The cavity for receiving the switch actuator is pre-formed as part of the seat cushion structure during manufacturing. This preliminary preparation of the mounting location simplifies the overall assembly process and ensures proper positioning without requiring complex post-assembly adjustments.
Data Source
AI summary
A seat has a seat frame and a seat cushion supported by the seat frame. The seat cushion has an upper surface that supports a user and a lower surface defining a cavity. The seat cushion moves between an at rest condition in which no operator is seated on the seat, and a deflected condition in which the seat cushion is deflected with respect to the frame in response to an operator seated on the seat. A switch is mounted to the frame and opens and closes an electrical circuit in response to an actuating force. A switch actuator is mounted to the seat cushion lower surface in the cavity and moves between a non-actuating position when the seat is at rest and an actuating position when the seat is deflected. The switch actuator delivers the actuating force as the switch actuator is moved toward the actuating position.