Spring-Mounted Backrest With Adjustable Resetting Force
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Solution Overview
Problem
Seating furniture with spring-mounted backrests often fail to provide a well-balanced resetting force for users of varying weights, leading to discomfort as heavy users experience insufficient force and light users encounter excessive force.
Innovation Solution
Incorporating adjustable setting means, such as a threaded rod with a gripping mechanism, to allow users to set the resetting force according to their weight, using a spring with progressive pretension and a linkage mechanism to connect the backrest and seat surface, enabling customizable resetting force through screwing the gripping means onto the threaded rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed resetting force is used in the spring-mounted backrest, then the structure is simple, but users of different weights experience discomfort due to unbalanced resetting force
Solution Approach 1:
The resetting force is made dynamically adjustable through a threaded rod mechanism that allows users to modify the spring pretension according to their weight. The threaded rod with gripping means enables continuous adjustment of the resetting force, transforming a static system into a dynamic one that adapts to different user requirements.
Solution Approach 2:
The invention changes the physical parameter of spring pretension to adjust the resetting force. By rotating the threaded rod, the pretension of the spring is modified, which directly changes the resetting force exerted on the backrest. This parameter change allows the same mechanism to serve users of different weights effectively.
2Force
If the spring pretension is increased to help heavy users, then heavy users benefit from sufficient resetting force, but light users experience excessive force that makes movement difficult
Solution Approach 1:
The resetting force is made dynamically adjustable through a threaded rod mechanism that allows users to modify the spring pretension according to their weight. The threaded rod with gripping means enables continuous adjustment of the resetting force, transforming a static system into a dynamic one that adapts to different user requirements.
Solution Approach 2:
The invention changes the physical parameter of spring pretension to adjust the resetting force. By rotating the threaded rod, the pretension of the spring is modified, which directly changes the resetting force exerted on the backrest. This parameter change allows the same mechanism to serve users of different weights effectively.
3Ease of operation
If the spring pretension is decreased to help light users, then light users can move the backrest easily, but heavy users experience insufficient resetting force
Solution Approach 1:
The resetting force is made dynamically adjustable through a threaded rod mechanism that allows users to modify the spring pretension according to their weight. The threaded rod with gripping means enables continuous adjustment of the resetting force, transforming a static system into a dynamic one that adapts to different user requirements.
Solution Approach 2:
The invention changes the physical parameter of spring pretension to adjust the resetting force. By rotating the threaded rod, the pretension of the spring is modified, which directly changes the resetting force exerted on the backrest. This parameter change allows the same mechanism to serve users of different weights effectively.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables comfortable and controlled movement of the backrest for users of different weights by allowing them to set the resetting force to their preference, ensuring ease of use and comfort by adjusting the spring's pretension and force requirements.
Implementation Method 1
resetting means which are designed to exert a resetting force on the backrest, said resetting force being directed counter to the force exerted by the user
Implementation Method 2
setting means which are designed to set the resetting force. A user can set the resetting force according to his requirements by using the setting means. For example, a relatively heavy user can set a relatively high resetting force
Data Source
AI summary
An item of seating furniture (100), with backrest (101), seat surface (102), supporting structure and resetting mechanism (200), wherein the backrest (101) and the seat surface (102) are connected to the supporting structure. The backrest (101) is pivotable relative to the supporting structure about a pivot axis from a first position into a second position, and the backrest (101) is connected to the seat surface (102) via connector (103). The connector (103) is designed such that, when the backrest (101) pivots relative to the seat surface, the seat surface (102) is inclined relative to the supporting structure, wherein the resetting mechanism (200) are designed to exert a resetting force on the backrest (101) in the second position, the resetting force is directed in the direction of the first position, wherein the item of seating furniture (100) with setting mechanism (104) which is designed to set the resetting force.