Chair Back Guiding Wheel for Wall Impact Buffering
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Solution Overview
Problem
Conventional chairs lack a mechanism to prevent the back support from accidentally hitting external objects, leading to potential damage when a user leans backward, particularly to wall surfaces.
Innovation Solution
Incorporating a back support guiding arrangement with at least one guiding wheel mounted on the rear side of the back support, which acts as a buffer to divert the force and minimize damage upon accidental contact with external objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the back support is made rigid and fixed, then the structural strength is improved, but the damage to external objects when accidentally hit increases
Solution Approach 1:
The guiding wheel acts as an intermediary element between the back support and the external object. When the back support accidentally hits an object, the guiding wheel contacts the object first and converts the impact force into rotational movement, preventing direct contact between the rigid back support and the external object, thereby reducing damage.
Solution Approach 2:
The guiding wheel changes the parameter of force transmission by converting linear impact force into rotational motion. This parameter change allows the system to maintain structural strength while reducing the harmful impact on external objects through mechanical energy transformation.
2Object-affected harmful factors
If the back support is made movable to reduce impact, then the damage to external objects is reduced, but the structural stability deteriorates
Solution Approach 1:
The guiding wheel serves as a mediator that enables controlled movement. It allows the back support to move slightly when contacting an object, converting impact into wheel rotation, while the wheel's mounting mechanism ensures the back support returns to its original position, maintaining structural stability.
Solution Approach 2:
The system transitions from a completely static back support to a dynamically responsive system where the guiding wheel can rotate to absorb impact. This dynamic element allows the structure to adapt to accidental contacts while maintaining overall stability through the wheel's constrained rotational movement.
3Device complexity
If no guiding mechanism is added, then the device complexity is low, but the protection capability against external objects is insufficient
Solution Approach 1:
A single guiding wheel is introduced as a simple intermediary component. This minimal addition provides effective protection capability by converting impact forces, demonstrating how a simple element can significantly improve protection without substantially increasing device complexity.
Solution Approach 2:
The guiding wheel is a simple, inexpensive component that can be easily replaced if needed. This approach provides effective protection capability through a low-cost element that simplifies the overall solution while maintaining adequate protection against external objects.
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
The guiding wheel effectively reduces the impact on external objects, preventing noticeable or severe damage by converting the hitting force into rotational or linear movement, thus protecting the object from harm.
Implementation Method 1
when the back support of the chair accidentally hits the external object, the guiding wheel is arranged to act as a buffer to minimize damage imparted on the external object
Data Source
AI summary
A chair includes a seat support, a leg frame extended underneath the seat support, a back support upwardly extended from the seat support, and a back support guiding arrangement. The back support guiding arrangement includes a guiding wheel rotatably mounted on a rear side of the back support for biasing against an external object so that when the back support of the chair accidentally hits the external object, the guiding wheel is arranged to act as a buffer to minimize damage imparted on the external object.