Telescopic Seating Chassis for Standing Assistance
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Solution Overview
Problem
Existing seating furniture designs for armchairs and sofas are structurally complex and heavy, with numerous components, making them difficult to adjust from a sitting to a stand-up position, particularly for users with restricted mobility.
Innovation Solution
A telescoping device supports the chassis and seat, allowing for a simpler design by raising the chassis and seat together, with adjustment fittings and a motorized drive to facilitate easy transition between positions, while ensuring stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a chassis is fixed in position and the seat is raised and pivoted using gear members or scissor systems, then the seat can be adjusted to stand-up position, but the structure becomes complex and heavy with many components
Solution Approach 1:
The patent combines the seat and chassis into a single movable unit that rises and pivots together as one assembly. This merging eliminates the need for separate gear members or scissor systems that would otherwise be required to adjust the seat relative to a fixed chassis, thereby reducing structural complexity while maintaining adjustability functionality.
Solution Approach 2:
Instead of keeping the chassis fixed and adjusting the seat relative to it (conventional approach), the patent inverts the approach by making the entire chassis-seat assembly movable. The chassis is raised and pivoted together with the seat using a single telescoping mechanism, reversing the traditional design paradigm and simplifying the overall structure.
2Adaptability or versatility
If multiple components are used to raise and pivot the seat, then adjustment functionality is achieved, but the weight of the seating furniture increases
Solution Approach 1:
The patent merges the seat and chassis into a single adjustable unit, eliminating the need for multiple separate components such as gear members or scissor systems. This consolidation reduces the overall weight of the furniture while preserving the essential adjustment functionality needed for transitioning between sitting and stand-up positions.
Solution Approach 2:
The telescoping device serves multiple functions simultaneously: it raises the chassis-seat assembly, provides structural support, and enables pivoting motion. This multi-functionality reduces the need for additional dedicated components, thereby reducing overall weight while maintaining full adjustment capability.
3Device complexity
If the chassis is raised together with the seat using a telescoping device, then the structure is simpler and lighter, but stability during standing up must be ensured
Solution Approach 1:
The telescoping device is designed to counteract tilting forces that occur when the user pushes off during the standing-up motion. By providing counterbalancing support, the device maintains stability and secure footing even as the chassis and seat rise together, ensuring safety without requiring complex additional stabilization mechanisms.
Solution Approach 2:
The telescoping device incorporates dynamic adjustment capabilities that allow it to adapt to the forces applied during the standing-up process. The mechanism can respond to user weight and movement, maintaining optimal stability throughout the transition from sitting to standing position while keeping the overall structure simple.
Data Source
Figure 1A~1B
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AI summary
A piece of seating furniture (1), in particular an armchair or sofa, is described and illustrated, comprising a seat (3), a chassis (8) supporting the seat (3), and a base (4) supporting the chassis (8). The seat (3) and the chassis (8) are adjustable relative to the base (4) from a lower sitting position to an upper standing position and back again by means of a seating furniture adjustment unit (7). To achieve a simpler and lighter construction, it is proposed that the chassis (8) be rigidly connected to the base (4) via a telescopic mechanism (9) that is retracted in the sitting position and extended in the standing position.