Chair for the sitting of a user and method of mounting said chair
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Solution Overview
Problem
Existing chairs are bulky, uncomfortable, costly to transport, and require irreversible assembly, making them inefficient for shipping and difficult to disassemble or reconfigure.
Innovation Solution
A chair design featuring a support structure with removable connection means, including a locking pin system that allows easy assembly and disassembly, enabling quick reconfiguration and stable attachment of components without screws or welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chairs are assembled with screws and fixed connections before shipping, then the chair structure is stable and reliable, but the chair becomes bulky, costly to transport, and difficult to disassemble
Solution Approach 1:
The chair is divided into separate modular components (seat, backrest, arms, base) that can be independently assembled and disassembled. Each component has standardized connection interfaces that enable quick assembly without permanent fasteners, resolving the contradiction between structural stability and ease of disassembly.
Solution Approach 2:
The connection system transitions from static permanent joints (screws, welding) to dynamic reversible joints using cam-locked mechanisms and removable pins. These mechanisms provide stable connection during use but allow quick release when needed, enabling the chair to adapt between stable assembled state and easy disassembly state.
2Adaptability or versatility
If ergonomic chairs use multiple separate elements connected by screws, then the chair provides better ergonomics and comfort, but the assembly process increases production costs and time
Solution Approach 1:
Ergonomic features such as lumbar support, armrest positions, and seat depth adjustments are pre-configured into modular components during manufacturing. This allows the complex ergonomic adjustments to be built-in once, rather than requiring time-consuming assembly operations at the factory, reducing production costs while maintaining ergonomic versatility.
Solution Approach 2:
The chair uses universal connection interfaces and standardized modular components that can be configured in multiple ergonomic arrangements. A single set of universal connectors serves multiple functions (assembly, disassembly, reconfiguration), simplifying the manufacturing process while maintaining adaptability to different user needs.
3Ease of operation
If chairs are assembled permanently before shipping, then the chair is ready for immediate use, but it becomes incompatible for readaptation and modification
Solution Approach 1:
The connection system uses dynamic reversible joints (cam-locked mechanisms, removable pins) instead of permanent fasteners. These joints provide stable connection for immediate use but can be quickly released and reconfigured, enabling the chair to transition between ready-to-use state and adaptable state without compromise.
Solution Approach 2:
The chair allows modification of configuration parameters (component positions, assembly arrangements) through simple manual operations on the reversible connection mechanisms. Users can change the chair's configuration by releasing and repositioning modular components, maintaining adaptability while ensuring immediate usability upon assembly.
Data Source
Figure 1
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AI summary
Chair for the sitting of a user, which comprises a support structure (2), provided with a support base (21), which is intended to be placed in abutment against the ground, and a seat (210), mounted above the support base (21), wherein the support structure (2) is provided with at least one first housing seat (20) provided with a first non-circular opening (200). The chair also comprises at least one support element (3), which is mechanically connected to the support structure (2) and is selected from among a back (31) and a pair of arms (32), and the support element (3) is provided with a second housing seat (30), which is aligned and communicating with the first housing seat (20). The chair also comprises removable connection means (4), which are placed as a mechanical connection between the support structure (2) and the support element (3) and comprise a locking pin (41), provided with a non-circular head (410), which engages the first housing seat (20) and the second housing seat (30) and is rotatable in a constraint sense, around a rotation axis (R), between a release position (B), in which it releases the support element (3) from the support structure (2), and a constraint position (C), in which the support element (3) is constrained to the support structure (2). The locking pin (41) comprises an elastic retention element (411) and the support structure (2) defines, in the first housing seat (20), at least one first retention recess (21'), in which the retention element (411) is elastically engaged with the locking pin (41) in constraint position, in order to retain the locking pin (41) in such position.