Chair Backrest Mesh Mounting Structure for Slim Frame Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing chair backrest structures with mesh stretching mechanisms often result in a bulky appearance, excessive weight, complex assembly, and high costs due to exposed frames and hanger support issues, which compromise design aesthetics and functionality.
Innovation Solution
A chair backrest structure with a reduced frame-to-appearance ratio, featuring a mesh stretching mechanism where synthetic-resin edge pieces engage with grooves on the frame rods to cover the front surface, allowing for a sleek design, lightweight construction, and simplified assembly, while a hanger system is integrated with a support mechanism that prevents projection and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the back frame is made wide to prevent flexure when the user sits down, then the structural stability is improved, but the appearance quality deteriorates due to the back frame greatly occupying the appearance and exposing from the mesh
Solution Approach 1:
The groove is relocated from the front surface to the rear surface of the back frame, changing the spatial dimension of the engagement structure. This allows the mesh to be anchored at the rear while covering the front surface completely, resolving the conflict between structural stability and appearance quality.
Solution Approach 2:
The engagement piece acts as an intermediary component that connects the mesh to the rear surface groove. It transfers the load from the mesh to the back frame structure without requiring front surface exposure, maintaining both stability and appearance.
2Stability of the object's composition
If both the back frame and binding frame are used to prevent flexing, then the structural stability is improved, but the device complexity increases with more parts, heavier weight, and longer assembly time
Solution Approach 1:
The binding frame is extracted and eliminated from the design. The mesh is directly engaged with the back frame groove, removing the intermediate binding frame component while maintaining structural stability through the rear surface engagement mechanism.
Solution Approach 2:
The functions of the back frame and binding frame are merged into a single integrated back frame structure with a rear surface groove. This consolidation reduces the number of parts while maintaining the flexure prevention capability.
3Ease of manufacture
If the support rod for the hanger is directly mounted in the middle of the rear surface, then the ease of manufacture is improved, but the appearance quality deteriorates as mounting parts project from the front surface
Solution Approach 1:
The hanger mounting mechanism is relocated to the rear surface dimension. The support rod engages with the groove formed in the rear surface of the back frame, allowing mounting without front surface projections and maintaining appearance quality while simplifying manufacture.
4Stability of the object's composition
If the support rod is mounted to the transverse rod at the lower part or to standing support posts, then the structural stability is improved, but the device complexity increases with increased support rod length and higher risk of breakage
Solution Approach 1:
The complex support rod mounting structure is extracted and replaced with a simplified groove-based engagement system in the rear surface. This eliminates the need for transverse rods or standing support posts, reducing complexity while maintaining stability through direct mesh-to-frame engagement.
Data Source
AI summary
An upholstered structure including an upholstery material for a chair or a backrest of a chair is proposed, which may achieve: reduced proportion of the appearance of the rear frame of the backrest over the appearance of the whole chair; more sophisticated design; reduced weight; reduced number of parts; and improved assemble-ability. In the chair having the backrest upholstered with the upholstery material over the front surface of the rear frame, the rear frame comprises a front frame to which the peripheral edge part of the upholstery material is fixed and an upper reinforcement frame rod. The laterally facing upper reinforcement frame rod is connected at its both ends to both ends of the laterally facing upper frame rod at the top of the front frame with the center part of the upper reinforcement frame rod separated backward from the upper frame rod.