Support assembly
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Solution Overview
Problem
Existing chair backrests, particularly in office or work chairs, face issues of complexity in design and assembly, material wear, and reduced support functionality over time due to mesh yielding or cushion degradation, leading to ergonomic compromises.
Innovation Solution
A support assembly comprising a carrier shell, receiving shell, and locking element with complementary connection structures forming a through-channel for tool-free assembly, ensuring stability and flexibility through a three-component design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mesh material is used for the backrest, then flexibility and air permeability are improved, but load-bearing capacity deteriorates and the mesh yields over time
Solution Approach 1:
The backrest is divided into two separate shells (carrier shell and receiving shell) that can be mounted together. The carrier shell provides structural support while the receiving shell provides flexibility and comfort, allowing each component to optimize its properties without compromising the other.
Solution Approach 2:
The backrest combines two different material properties in one structure: a firmer carrier shell for support and a more flexible receiving shell for comfort. This composite structure allows the backrest to simultaneously achieve load-bearing capacity and flexibility.
2Ease of operation
If a mesh material is used for the backrest, then flexibility is improved, but durability deteriorates as the mesh is easily destroyed
Solution Approach 1:
The backrest is divided into two separate shells (carrier shell and receiving shell) that can be mounted together. The carrier shell provides structural support while the receiving shell provides flexibility and comfort, allowing each component to optimize its properties without compromising the other.
Solution Approach 2:
The backrest combines two different material properties in one structure: a firmer carrier shell for support and a more flexible receiving shell for comfort. This composite structure allows the backrest to simultaneously achieve load-bearing capacity and flexibility.
3Ease of operation
If a mesh material is used for the backrest, then flexibility is improved, but assembly complexity increases due to complicated mesh tensioning
Solution Approach 1:
The backrest is divided into two separate shells (carrier shell and receiving shell) that can be mounted together. The carrier shell provides structural support while the receiving shell provides flexibility and comfort, allowing each component to optimize its properties without compromising the other.
Solution Approach 2:
The receiving shell is mounted on the carrier shell in a nested arrangement, with the connection structures of both shells engaging to form a through-channel for the locking element. This nested design simplifies assembly by providing a straightforward mounting process.
4Reliability
If padded chairs with adjustment options are used, then ergonomic support is improved, but design complexity and production labor increase
Solution Approach 1:
The backrest is divided into two separate shells (carrier shell and receiving shell) that can be mounted together. The carrier shell provides structural support while the receiving shell provides flexibility and comfort, allowing each component to optimize its properties without compromising the other.
Solution Approach 2:
The receiving shell is designed as a flexible component that can adapt to the user's back shape, providing ergonomic support without requiring complex padding mechanisms or adjustment options. The flexibility of the shell itself enables the ergonomic function.
5Reliability
If padded chairs with adjustment options are used, then ergonomic support is improved, but production time increases due to laborious production
Solution Approach 1:
The backrest is divided into two separate shells (carrier shell and receiving shell) that can be mounted together. The carrier shell provides structural support while the receiving shell provides flexibility and comfort, allowing each component to optimize its properties without compromising the other.
Solution Approach 2:
The receiving shell is designed as a flexible component that can adapt to the user's back shape, providing ergonomic support without requiring complex padding mechanisms or adjustment options. The flexibility of the shell itself enables the ergonomic function.
Data Source
AI summary
A support assembly for a chair, the support assembly including a carrier shell, a receiving shell mountable on the carrier shell, and a locking element. The carrier shell and the receiving shell each have, in an edge region, connection structures formed in a manner complementary to one another. The connection structures are configured to engage in one another in the mounted state in such a way that they form a through-channel into which the locking element can be introduced.