Device for adjusting the degree of inclination of the seat of a chair
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing chair adjustment mechanisms limit the tilting of backrests to forward or backward only, face difficulties in material adhesion and surface finish maintenance, and do not allow customizable tilt angles, making them complex, difficult to assemble, and not user-friendly.
Innovation Solution
A device comprising a box-like element with L-shaped wings, thermoplastic elastomer dampers, and a gas-operated post system that allows tilting in all directions, with adjustable stroke limits and easy assembly using metallic parts, enabling customizable tilt angles and resistance settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If springs and gas-filled pistons are used for chair adjustment mechanisms, then height adjustment and tilting functionality are achieved, but the system becomes complex and limits tilting to forward or backward only
Solution Approach 1:
The patent removes the complex spring and gas-filled piston mechanisms from the chair adjustment system. Instead, it uses a simple flat plate with L-shaped wings that can be manually positioned to achieve tilting in multiple directions, thereby reducing device complexity while maintaining adaptability
Solution Approach 2:
Rather than using active mechanical components (springs, pistons) to enforce tilting motion, the invention inverts the approach by using passive geometric constraints (L-shaped wings fitting into slots) that naturally guide motion in desired directions without complex mechanisms
2Strength
If vulcanized rubber spring systems are used with chemical assembly, then structural integrity is achieved, but material adhesion becomes difficult and surface finish maintenance becomes problematic
Solution Approach 1:
The patent divides the adjustment mechanism into separate, independent components (flat plate, L-shaped wings, slots) that can be manufactured separately using conventional processes and assembled without chemical bonding. This eliminates adhesion problems while maintaining structural integrity through mechanical fit
Solution Approach 2:
The invention uses simple, inexpensive metallic components that can be easily manufactured and replaced if needed, rather than complex vulcanized rubber systems. The simple geometry allows for easy manufacturing with conventional machinery
3Adaptability or versatility
If complex adjustment systems with multiple components are used, then functionality is achieved, but rapid assembly and disassembly become difficult
Solution Approach 1:
The mechanism is segmented into simple, discrete components (plate, wings, slots) that can be quickly assembled and disassembled. The L-shaped wings fit into slots to provide customizable tilt angles without requiring complex assembly procedures
Solution Approach 2:
The L-shaped wings are designed to self-align and self-lock into the slots at desired positions, eliminating the need for complex adjustment procedures or specialized assembly tools, thereby enabling rapid assembly and easy customization
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
Enables the chair to tilt freely in all directions to desired angles, with customizable movement breadth and resistance, rapid assembly, and easy maintenance, while maintaining component positioning and structural robustness.
Implementation Method 1
a pair of flat dampers (18a, 18b) arranged between the lower first surface (16) and the upper first surface (17)
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A device (1) for adjusting a degree of inclination of the seat of a chair, which has a box-like element (2), which can be associated mechanically below an axially perforated plate (10), which in turn can be associated below the seat. The box-like element (2) is adapted to contain a pair of flat dampers (18a, 18b) between which adjustment means (20) are interposed for adjusting the stroke limit of the inclination of the seat with respect to the plate (10) along two distinct diametrical planes. The adjustment means (20) comprise a receptacle for a gas-operated post (15) of the seat.