Armrest Assembly with Friction Ring for Customizable Rotation Force
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Solution Overview
Problem
Existing armrest assemblies lack customization of rotational force for individual users, leading to inconvenience and noise during rotation, and are prone to random loose of hinge screws due to repeated rotation.
Innovation Solution
An armrest assembly with an arm support pad that rotates relative to an inner body, featuring a frictional ring that adjusts the rotational force based on the assembly force of the hinge screw, preventing random loose of the hinge screw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a predetermined manipulation sense provision part is used to provide sense of manipulation, then the armrest assembly can rotate, but the rotational force cannot be customized for each user and noise occurs during rotation
Solution Approach 1:
The patent changes the friction coefficient parameter by providing multiple friction members with different friction coefficients. This allows users to select the appropriate friction member to customize the rotational force according to their needs, resolving the contradiction between providing a predetermined manipulation sense and enabling customization for different users.
2Ease of manufacture
If a hinge screw is used to connect rotating components, then the armrest assembly can be assembled, but the hinge screw may randomly loose due to repeated rotation manipulation
Solution Approach 1:
The patent introduces a friction member as an intermediary component between the rotating armrest component and the fixed component. This friction member not only provides the necessary friction for manipulation but also acts as a protective layer that prevents direct contact and potential loosening of the hinge screw, thereby maintaining connection stability during repeated rotation.
3Ease of operation
If interference is used to generate sense of manipulation, then the armrest can provide manipulation force, but noise greatly occurs on the rotational path
Solution Approach 1:
The patent changes the friction coefficient parameter by providing multiple friction members with different friction coefficients. This allows selection of appropriate friction members that can provide sufficient manipulation force while minimizing noise generation during rotation, thus resolving the contradiction between manipulation force and noise reduction.
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
Customizes the rotational force for each user, enhancing convenience and preventing hinge screw loose, thereby minimizing noise and ensuring stable operation.
Implementation Method 1
a frictional ring disposed between the inner body and the arm support pad and providing a frictional force between the inner body and the arm support pad when the arm support pad rotates with respect to the inner body
Data Source
AI summary
An armrest assembly includes: an arm frame body having formed therein an inner space with an open upper end, and mediating coupling to a seat portion; an inner body which is inserted to be arranged in the inner space of the arm frame body, and is arranged to be movable in up and down directions according to the manipulation of a user; an arm support pad which is connected to the upper portion of the inner body, on which the arm of the user is placed and supported, and which has a front end portion rotatable in the left and right horizontal directions due to an external force provided by the user; and a frictional ring which provides the frictional force between the inner body and the arm support pad.