Seating
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Solution Overview
Problem
Existing foldable seating furniture is prone to mechanical damage, has a complex and error-susceptible operating mechanism, and is not very robust, leading to increased production costs and susceptibility to wear and tear, especially when used outdoors.
Innovation Solution
A seating furniture design featuring a backrest pivotably mounted at the rear with three pivoting levers, where the first end of each lever is connected to the seat and the second end to the body, providing a simpler, more robust construction that reduces component count and production costs, while also incorporating a reinforcement and damping elements for enhanced mechanical resilience and ergonomic design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex operating mechanism is used to enable folding, then the seating furniture can be folded into a compact state, but the susceptibility to mechanical damage and errors increases
Solution Approach 1:
The folding mechanism is divided into three separate pivoting levers (first, second, and third pivoting levers) instead of using a single complex mechanism. Each lever handles a specific part of the folding motion, which simplifies the overall system while maintaining the folding capability. This segmentation reduces the complexity and susceptibility to mechanical failure.
Solution Approach 2:
Instead of having the backrest and seat fold independently through complex mechanisms, the invention inverts the approach by using a coordinated system of three pivoting levers that work together to achieve the folding motion. The levers are arranged so that their combined motion produces the desired folding effect with simpler individual components.
2Reliability
If more components are used to achieve folding functionality, then the folding mechanism can be more robust, but the production costs and device complexity increase
Solution Approach 1:
The invention merges the functions of multiple folding mechanisms into a coordinated system of three pivoting levers. Rather than using separate complex mechanisms for each folding action, the three levers work together in an integrated manner, reducing the total number of components while maintaining robustness through their cooperative operation.
Solution Approach 2:
Each of the three pivoting levers serves multiple functions: they provide structural support, enable folding motion, and work together to coordinate the movement of both the backrest and seat. This multi-functionality reduces the need for additional specialized components, simplifying the overall device while maintaining reliability.
3Weight of moving object
If lightweight materials are used to reduce weight, then the seating furniture is easier to handle, but the robustness and resistance to mechanical damage decrease
Solution Approach 1:
The invention applies different quality characteristics to different parts of the structure. The three pivoting levers are designed with specific local properties - they are sufficiently robust to handle mechanical loads where needed, while the overall construction remains lightweight. The reinforcement element is strategically placed to provide strength exactly where mechanical stress occurs, without adding unnecessary weight throughout the entire structure.
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
Seating furniture (1) comprising a body (2), a seat (3) and a backrest (4), wherein the body (2) is open at the top (5), and in a closed state of the seating furniture (1) the seat (3) is arranged in the body (2), wherein the backrest (4) covers the top (5) of the body (2), wherein the backrest (4) is pivotally mounted on the body (2), and the seating furniture (1) comprises three pivot levers (8, 9, 10) which are pivotally connected to the seat (3) at spaced-apart points, the first pivot lever (8) being connected to the body (2) in the front region (6), and the second pivot lever (9) being connected to the body (2) in the rear region (7), wherein the first end (11) of a third pivot lever (10) is connected to the seat (3) between the first ends (11) of the first pivot lever (8) and the second pivot lever (9), and the second end (12) is connected to the backrest (4).