Multi-Joint Control Lever Carrier for Adjustable Vehicle Seat Positioning
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Solution Overview
Problem
Existing height-adjustable control lever carriers for commercial vehicle seats require multiple adjustment devices, such as pairs of rails, to accommodate drivers of different heights, leading to complexity and additional effort for optimal operation.
Innovation Solution
A multi-joint mechanism construction, like a four-joint mechanism with adjustable and differently lengthed struts, allows for simultaneous height, longitudinal, and inclination adjustments of the control lever carrier, enabling a curved path adjustment without additional devices, using pivot axes and a variable-length actuator like a gas spring for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple adjustment devices (pairs of rails) are used to adjust control lever carrier height and longitudinal position, then drivers of different heights can achieve optimal positioning, but device complexity increases significantly
Solution Approach 1:
The patent combines height adjustment and longitudinal position adjustment into a single integrated mechanism. The control lever carrier is mounted on a support structure that allows simultaneous adjustment in both vertical and longitudinal directions through one coordinated system, eliminating the need for separate rail pairs for each adjustment function.
Solution Approach 2:
The support structure serves multiple functions: it provides height adjustment, longitudinal position adjustment, and structural support for the control lever carrier. This multi-functional design replaces what would otherwise require multiple specialized adjustment devices.
2Adaptability or versatility
If multiple adjustment devices are installed to provide both height and longitudinal adjustment, then optimal positioning is achieved, but the effort required for adjustment increases
Solution Approach 1:
By merging height and longitudinal adjustment into a single mechanism, the driver only needs to operate one adjustment system rather than coordinating multiple independent devices, significantly reducing the effort and complexity of the adjustment process.
3Adaptability or versatility
If additional adjustment devices are added to the seat structure, then adjustment range is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The integrated support structure is designed to perform multiple adjustment functions simultaneously, reducing the total number of components that need to be manufactured and assembled. This multi-functional approach simplifies the manufacturing process compared to producing and installing multiple separate adjustment devices.
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
This solution allows for seamless height and distance adjustments, providing optimal comfort and operation for drivers of varying sizes without the need for additional adjustment devices, enhancing usability and reducing operational complexity.
Implementation Method 1
a variable-length actuator like a gas spring for precise positioning
Implementation Method 2
A multi-joint mechanism construction, like a four-joint mechanism with adjustable and differently lengthed struts, allows for simultaneous height, longitudinal, and inclination adjustments
Data Source
AI summary
The invention relates to a height-adjustable control lever carrier for a commercial vehicle seat, which carrier is at least partially arranged to the side of a seat part, wherein the control lever carrier is provided for receiving at least one control lever for controlling vehicle equipment and at least one armrest, and is characterised in that the control lever carrier comprises a multi-joint mechanism construction, by means of which the control lever carrier is adjustable both in a seat height direction and in a seat longitudinal direction relative to the seat part.