Foldable Chair with Nested Backrest Case for Compact Storage
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Solution Overview
Problem
Conventional foldable chairs are bulky and inconvenient for storage and transport, especially for individuals with mobility issues or disabilities who require portable seating solutions for bathing or showering.
Innovation Solution
A foldable chair design featuring pivotable legs with extensions, a main lock assembly, and control cables that allow the chair to compactly form a portable travel case, enabling easy storage and transport while providing stability and support for users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional foldable chairs use adjustable legs and foldable configurations, then the chair can be folded for transport, but the chair remains large and bulky with relatively large dimensions even when retracted
Solution Approach 1:
The chair components are designed to nest within each other when folded, with legs collapsing into the seat frame and the backrest folding into the seat structure, creating a compact nested configuration that significantly reduces storage volume while maintaining ease of carrying
Solution Approach 2:
The chair employs dynamic collapsing mechanisms where legs can be telescoped and retracted, and the overall structure can transition between extended and collapsed states, allowing the chair to adapt its volume while maintaining structural integrity and portability
2Reliability
If specialized shower chairs are designed to provide support and stability, then they offer safe seating for bathing, but they are large and bulky and not convenient for storage or traveling
Solution Approach 1:
The shower chair features dynamically adjustable legs that can be extended or retracted, allowing the chair to provide stable support when needed while collapsing to a compact size for storage and transport, resolving the contradiction between stability and portability
Solution Approach 2:
The chair is divided into separable components including adjustable leg assemblies that can be independently positioned or collapsed, allowing the structure to maintain stability during use while enabling compact folding for storage, addressing both reliability and volume requirements
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
The chair is highly compact, easy to carry, and suitable for various situations, including bathing, offering a stable and convenient seating solution for elderly or physically challenged individuals.
Implementation Method 1
a first set of control cables, each cable of the first set of control cables extending from the main lock assembly to respective one of the plurality of legs
Implementation Method 2
each of the legs includes a leg lock assembly configured to interact with the main lock assembly and operable to lock and unlock respective one of the leg extensions in the collapsed and deployed positions
Data Source
AI summary
A foldable chair includes a seat member having a front side for supporting a user and a back side, a backrest member having a front surface for supporting the user and a back surface, and a plurality of legs. Each of the legs is pivotably connected to the back side of the seat member and each leg is adapted to pivot from a folded configuration where each leg is generally parallel to the back side of the seat member to an unfolded configuration where each leg is generally transverse to the back side of the seat member. The backrest member is configured to hingedly engage the seat member and to selectively enclose at least the back side of the seat member to form a portable case.