Multifunction Seat Chassis with Single-Handle Three-Line Control

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Solution Overview

Problem

Existing multifunction seats have complex and cumbersome structures with multiple handles, making them difficult to operate and bulky, as they require separate handles for adjusting the backrest angle, cushion height, and cushion movement, which wastes energy and affects ergonomics.

Innovation Solution

A simplified multifunction chassis design using a single handle with three pull lines to control the backrest angle, cushion height, and cushion movement, featuring a shift arm, pull line positioning grooves, and a spring-rotating base system that allows for easy adjustment and locking of these parameters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple handles are installed to control different seat functions, then each function can be controlled independently, but the device complexity and number of components increase

Engineering Contradiction:

Improvefunction control capabilityVSAvoidnumber of handles

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines multiple separate handles into a single integrated handle assembly. This single handle controls multiple functions (backrest angle, cushion height, cushion movement) through a unified structure, reducing the number of components while maintaining full functional control capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single handle is designed as a multi-functional control device that can operate multiple seat adjustment functions. By integrating universal control capability into one handle, the patent eliminates the need for separate dedicated handles for each function, simplifying the overall device structure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple control rods with various adjustment functions are outwardly projecting, then all adjustment functions are available, but the seat structure becomes bulky and heavy

Engineering Contradiction:

Improveadjustment function availabilityVSAvoidchassis weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of stationary object

Solution Approach 1:

The patent merges multiple outwardly projecting control rods into a single integrated handle mechanism. By combining the control functions into one compact assembly rather than having separate projecting rods for each function, the overall weight of the chassis is reduced while maintaining all necessary adjustment capabilities.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated handle serves as a universal control device that replaces multiple separate control rods. This multi-functional design eliminates redundant structural elements, reducing the total weight of the chassis while providing all required adjustment functions through a single lightweight component.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If multiple control rods with various adjustment functions are outwardly projecting, then all adjustment functions are available, but much energy is wasted to move the seat

Engineering Contradiction:

Improveadjustment function availabilityVSAvoidenergy consumption

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The patent combines multiple control rods into a single integrated handle system. This consolidation reduces the total mass that needs to be moved during seat adjustments, thereby reducing the energy required to operate the seat while maintaining all adjustment functions through the unified control mechanism.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The universal handle design replaces multiple separate control rods with a single lightweight multi-functional device. By eliminating redundant structural mass, the energy consumption for moving the seat during adjustments is reduced, while the handle maintains the capability to control all seat functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Adaptability or versatility

If multiple handles are installed on both sides of the seat, then each function can be controlled independently, but the appearance of the seat becomes ugly

Engineering Contradiction:

Improvefunction control capabilityVSAvoidseat appearance

Core Design Contradiction:

Adaptability or versatilityVSShape

Solution Approach 1:

The patent merges multiple separate handles into a single streamlined handle assembly. This consolidation creates a cleaner, more aesthetically pleasing appearance by eliminating the visual clutter of multiple handles, while the integrated design maintains full control capability for all seat functions through the unified handle mechanism.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS9386858B2Structure-improved multifunction chassis

Publication Date: 2016.07.12 CHEN YUCHENG

AI summary

A structure-improved multifunction chassis includes a chassis base, a handle and a plurality of pull lines, wherein the chassis base includes a backrest angle adjustment device, a cushion height adjustment device, and a cushion back-and-forth moving device. The chassis base is pivotally connected with a left and right connecting rod of a seat backrest frame. The handle includes a shift arm, a handle fixed block, and a handle base. The handle fixing block is installed in the handle base and is able to swing up and down. The handle fixing block is mounted on the handle base by bolts. One handle controls three pull lines at the same time, and the user adjusts the angle of the backrest, cushion lifting or moving back and forth by operating the handle.