Semi-Rigid Fibrous Panel Joint With Living Hinges
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Solution Overview
Problem
Joining semi-rigid fibrous materials is mechanically challenging due to the lack of structural rigidity and reliability in existing methods, which often result in uneven pressures and deformation, and the use of non-rigid materials is complicated by the need for strong, aesthetically pleasing connections.
Innovation Solution
The technique involves using relief cutting, folding, and sewing/bonding to create a joint between semi-rigid fibrous bodies with 'V' shaped reliefs and partial depth incisions, forming living hinges that allow for a coplanar surface when closed, while maintaining accessibility to the seam for adjustment and hiding it from view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive and fasteners are used to join semi-rigid fibrous panels, then structural rigidity is improved, but weight and cost increase without adequate acoustic properties
Solution Approach 1:
The patent uses semi-rigid fibrous panels as flexible yet structurally adequate materials to replace rigid metal or wood components. These panels provide the necessary structural integrity while maintaining flexibility for acoustic applications, eliminating the need for heavy rigid fastening components.
Solution Approach 2:
The patent introduces a specialized joint design with living hinges as an intermediary mechanism between panels. This joint structure provides the necessary connection and structural rigidity without requiring heavy adhesives or fasteners, achieving strength through clever mechanical design rather than material mass.
2Strength
If adhesive and fasteners are used to join semi-rigid fibrous panels, then structural rigidity is improved, but reliability deteriorates due to uneven pressures and deformation
Solution Approach 1:
The semi-rigid fibrous panels themselves act as flexible structures that can accommodate pressure distribution without rigid deformation. The material's inherent flexibility allows it to conform to the joint geometry, distributing loads evenly and preventing the stress concentrations that cause adhesive failure or fastener deformation.
Solution Approach 2:
The living hinge joint introduces dynamic flexibility to the connection, allowing the joint to move and adapt to structural changes without failing. This dynamic capability enables the joint to maintain reliability under varying loads and conditions, preventing the rigid-brittle failure modes associated with traditional fastening methods.
3Ease of manufacture
If traditional joining methods are used, then ease of manufacture is improved, but manufacturing precision deteriorates due to deformation and uneven pressures
Solution Approach 1:
The joint design incorporates pre-formed living hinges and relief cuts that are created during panel manufacturing. This preliminary preparation ensures that when panels are assembled, the joints naturally align and conform to the desired geometry without requiring complex adjustment or high-precision fastening operations, achieving both ease of assembly and manufacturing precision.
Solution Approach 2:
The flexibility of the semi-rigid fibrous panels allows them to be manipulated and formed into precise joint configurations during assembly. The material can be folded, bent, and shaped to achieve exact geometric relationships, enabling high manufacturing precision through simple manual or automated folding operations rather than complex fastening procedures.
4Reliability
If semi-rigid fibrous panels are used instead of rigid materials, then acoustic properties are improved, but ease of operation deteriorates due to mechanical difficulty in joining
Solution Approach 1:
The living hinge joint provides dynamic flexibility that simplifies the joining operation. The panels can be easily folded and manipulated into the joint configuration, and the flexible material accommodates alignment tolerances naturally. This dynamic approach transforms a mechanically difficult rigid joining task into a simple flexible folding and bonding operation.
Solution Approach 2:
The semi-rigid fibrous panels' inherent flexibility allows them to be easily manipulated during assembly. The material can be folded, bent, and shaped to achieve precise joint configurations without requiring complex tools or techniques, making the joining operation simple despite the material's non-rigid nature.
Data Source
AI summary
Embodiments disclosed herein describe a semi-rigid fibrous structure. The semi-rigid fibrous structure contains a first semi-rigid fibrous body comprising a first living hinge; a second semi-rigid fibrous body comprising a second living hinge; and a rotatable joint formed at a bond between the first semi-rigid fibrous body and the second semi-rigid fibrous body proximate the first living hinge and the second living hinge.