Foldable dining chair
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Solution Overview
Problem
Existing foldable dining chairs lack versatility in use states, failing to adapt to different environments and user needs, such as home and outdoor use, and do not accommodate the growth of infants effectively, with limited functionality and high manufacturing costs.
Innovation Solution
A foldable dining chair design featuring a connecting shaft with rotatable and fixable bushings, a locking device, and telescopic legs, allowing for multiple use states and easy adjustment between them, while maintaining a lower manufacturing cost through innovative structural design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single use state design is adopted, then the structure is simple, but the adaptability to different environments and user needs is poor
Solution Approach 1:
The chair employs dynamic adjustment mechanisms allowing the seat board, backrest, and footrest to rotate and lock at multiple angles, transforming a static single-state structure into a dynamic multi-state system that adapts to different usage scenarios while maintaining reasonable structural complexity
Solution Approach 2:
The chair is designed with universal adaptability through multiple use states including infant mode, child mode, and adult mode, enabling a single chair to serve different age groups and environments (home, outdoor, travel) without requiring multiple specialized chairs
2Adaptability or versatility
If multiple adjustment mechanisms are added to achieve multiple use states, then the versatility improves, but the manufacturing cost increases
Solution Approach 1:
The patent merges multiple adjustment functions (seat angle, backrest angle, footrest angle, leg telescoping) into a unified rotating and locking mechanism system, where a single structural approach handles multiple adjustment needs, reducing the number of separate components and lowering manufacturing costs
Solution Approach 2:
The chair is segmented into independently adjustable modules (seat board, backrest, footrest, chair legs) that can be adjusted separately, allowing versatility through combination of simple modular components rather than complex integrated mechanisms
3Volume of moving object
If the chair is designed for compact folding, then the portability improves, but the stability during use may be compromised
Solution Approach 1:
The chair transitions from a compact folded state to a stable expanded state through telescopic chair legs and rotatable connections, where the structure dynamically adapts between portability and stability requirements based on usage condition
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention discloses a foldable dining chair which comprises a chair portion(1), a connecting shaft (2), a footrest lever (3) and chair legs (4). Front legs, rear legs, a backrest frame and a footrest lever are respectively fitted on the connecting shaft (2) by corresponding bushings (51,52,53,54); each of the bushings consists of a bushing body (551) and a joint (552) fixedly connected with the bushing body, wherein a connection mechanism is arranged on an inner wall of the bushing body, and the connection mechanism comprises recesses and limiting blocks (57); the connecting shaft is also provided with a locking device (6) consists of a locking block (61), a return spring (62), a moving block (63) and a handle (64), wherein several bumps (611) matching the recesses of each of the bushings are protruded on the locking block; and the individual bushings are sheathed in close proximity to one another on the connecting shaft, the limiting blocks also form several slidable slots (631) at one side in a movement direction of the bumps, and the limiting blocks also extend into the slidable slots. In the invention, the unique design of structures fitted at the connecting shaft allows that the dining chair can have more abundant use states, and it also becomes easier to adjust the dining chair among various states and integrally fold the dining chair; and more importantly, the dining chair has lower machining cost.