Chair Tilting Mechanism With Elastic Pivot for Simpler Assembly
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Solution Overview
Problem
Existing tilting mechanisms for chairs are complex and costly due to their multi-part structure, which complicates assembly and increases production costs.
Innovation Solution
A simplified tilting device composed of three structural parts: two plates and an elastic body, where the lower plate supports the gas spring and serves as a pivot, and the upper plate attaches the seat plate, creating a firm and integrated tilting mechanism that eliminates the need for additional attachments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional multi-part tilting mechanism is used, then the tilting function is achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the tilting mechanism with the seat support function into a single integrated structure. The elastic body serves dual purposes: supporting the seat plate and enabling tilting movement. This merging eliminates the need for separate tilting mechanisms while maintaining the tilting function, directly reducing device complexity without compromising reliability
Solution Approach 2:
The elastic body is designed to perform multiple functions simultaneously: it acts as a support element, a tilting mechanism, and a restoring force generator. This multi-functionality reduces the number of components needed while ensuring the tilting function is reliably achieved through the elastic properties of the single elastic body
2Device complexity
If a multi-part tilting device is used, then the tilting mechanism is complete, but the number of parts and assembly complexity increase
Solution Approach 1:
The patent merges multiple functions into a single elastic body component, eliminating the need for multiple separate parts. The elastic body integrates support, tilting, and restoring force functions, reducing the number of parts to just the elastic body and seat plate, thereby simplifying assembly procedures and reducing assembly complexity
Solution Approach 2:
The solution segments the system into only two essential components: the elastic body and the seat plate. This minimal segmentation eliminates unnecessary intermediate parts while maintaining functional completeness, making the assembly process straightforward and reducing manufacturing complexity
3Reliability
If a complex tilting mechanism is used, then the tilting function is reliable, but the production cost increases
Solution Approach 1:
The patent replaces expensive, complex mechanical tilting mechanisms with a simple, inexpensive elastic body. The elastic body can be manufactured at low cost using standard elastic materials and processes, significantly reducing production costs while maintaining reliable tilting function through the inherent elastic properties of the material
Solution Approach 2:
The invention changes the approach from mechanical complexity to material property utilization. By selecting elastic bodies with appropriate elastic coefficients and dimensions, the patent achieves reliable tilting function through parameter optimization rather than complex structure, thereby reducing manufacturing costs while maintaining functionality
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 design results in a structurally simple and cost-effective tilting mechanism that allows the chair to tilt smoothly, reducing assembly complexity and production costs while maintaining functionality.
Implementation Method 1
The elastic body sandwiched between the lower plate and the upper plate is used for the tilting movement of the seat plate to build up a corresponding restoring force
Implementation Method 2
In order to simplify the insertion of the upper end of the gas spring into the bulge of the lower one and to increase the friction between the upper end of the gas spring and the inner wall of the bulge, the bulge is at least partially conical
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
The invention relates to a tilting device (5) for a chair, comprising a lower plate (6) and an upper plate (7). An elastic body (8) is located therebetween. The lower plate (6) has a bulge (9) in the vertical direction, by means of which the tilting device (5) is placed onto the upper end of a gas spring (2). The seat plate (3) of the chair is fastened to the upper plate (7).