Connecting structure between feet and central member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Chair feet occupy significant space, leading to high packaging and transportation costs, and the stress points between the feet and center piece have poor support strength, potentially damaging the chassis structure.
Innovation Solution
A connecting structure featuring center piece connecting portions with rotation limit slots and clamping platforms, and support foot connecting portions with rotation limit protrusions and hooks, providing stable force distribution and preventing weak stress points, allowing for reliable chassis and seat performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If integrally formed chair feet are used, then the structure is simple and strong, but the molding process is difficult and production efficiency is low
Solution Approach 1:
The patent divides the chair foot into multiple separate components: a center piece and multiple support feet. The center piece contains connection structures (grooves, positioning protrusions, elastic blocks) that interface with corresponding features on the support feet. This segmentation allows each component to be manufactured independently using simpler processes, then assembled together, thereby improving production efficiency while maintaining structural integrity through the designed connection mechanisms.
2Productivity
If detachable chair feet with buckles are used, then production efficiency is improved, but the buckle tongue has poor support strength and causes stress concentration
Solution Approach 1:
The patent removes the weak buckle tongue structure from the design and replaces it with a more robust connection system. The support feet connect directly to the center piece through grooves and positioning protrusions, eliminating the need for separate buckle tongues that concentrated stress. This extraction of the problematic element resolves the strength issue while preserving the detachable assembly benefit.
Solution Approach 2:
The connection structure employs multiple material components working together: the center piece material, support foot material, elastic block material, and friction block material. This composite approach distributes mechanical stresses across different materials with complementary properties, preventing stress concentration at any single point and enhancing overall connection strength.
3Strength
If chair feet with complex connection structures are used, then connection strength is improved, but the feet occupy more space and packaging costs increase
Solution Approach 1:
The patent designs the support feet to nest within or around the center piece structure. The connection features (grooves, protrusions, elastic blocks) are integrated into the existing geometry rather than adding external bulk. This nesting arrangement maintains strong connections while minimizing the overall volume occupied by the chair foot assembly, reducing packaging space requirements.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present disclosure relates to a connecting structure for connecting support feet and a center piece, a support foot, a center piece, a chassis and a seat, and belongs to the technical field of seat connection structures. The connecting structure for connecting support feet and a center piece includes: center piece connecting portions provided on the outer periphery of the center piece for connecting with the support feet; support foot connecting portions provided on one end of the support feet for connecting with the center piece. Two side walls of each of the center piece connecting portions are further provided with rotation limit grooves, with a clamping platform arranged inside; two side surfaces of the support foot connecting portion are respectively provided with rotation limit protrusions outwardly protruding, an abutting portion is provided on the lower surface. The connecting structure for connecting support feet and the center piece is stable in force, and no stress point with weak strength exists, such that the corresponding chassis and seat have reliable performance and long service life.