Angle-Adjustable Support Pivot Mechanism for Stable Low-Force Positioning
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Solution Overview
Problem
Pivot mechanisms in various devices often face issues with friction forces being either too large or too small, leading to increased external force requirements for rotation, wear-out, and inefficient positioning, as well as improper counterforces causing the rotating body to revert to its original position.
Innovation Solution
An angle-adjustable support with a pivot mechanism featuring a rotator, stopper, and adjuster, allowing for three working states: locking, unidirectional pivoting, and bidirectional rotation, utilizing teeth and recessions to manage friction and maintain desired angular positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the friction force between the stator and the rotor is increased to improve positioning stability, then the rotating body can be held in place more effectively, but the external force required to rotate the rotating body increases and the pivot mechanism wears out faster
Solution Approach 1:
The pivot mechanism is divided into two functional components: a stator with teeth for positioning and a rotor with a smooth surface for easy rotation. This segmentation allows the stator to provide strong positioning friction while the rotor maintains low friction for smooth operation, resolving the contradiction between positioning stability and ease of rotation.
Solution Approach 2:
Different surface qualities are applied to different parts of the pivot mechanism: the stator has a rough toothed surface for high friction and positioning, while the rotor has a smooth surface for low friction and easy rotation. This local differentiation of surface properties resolves the contradiction between needing high friction for positioning and low friction for operation.
2Ease of operation
If the friction force between the stator and the rotor is decreased to reduce wear and ease rotation, then the pivot mechanism has longer service life and requires less external force, but the rotating body cannot be efficiently positioned and held in place
Solution Approach 1:
The pivot mechanism separates positioning function (stator with teeth) from rotation function (rotor with smooth surface), allowing each component to be optimized independently for its specific function without compromising the other.
Solution Approach 2:
The stator is designed with a rough toothed surface for high friction and secure positioning, while the rotor is designed with a smooth surface for low friction and easy rotation, applying different surface qualities to different functional zones.
3Measurement precision
If the relationship between the components of the pivot mechanism is adjusted to eliminate counter force, then the rotating body can be positioned exactly, but the structure becomes more complex
Solution Approach 1:
The pivot mechanism is segmented into a stator with teeth and a rotor with a smooth surface, simplifying the component relationship while achieving precise positioning. The teeth-on-stator design eliminates the need for complex counterforce balancing mechanisms.
Solution Approach 2:
The positioning function is extracted from the friction-based mechanism and implemented through the tooth-stator engagement, eliminating the need for complex component relationships and counterforce management while achieving precise positioning.
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 easy adjustment and stable positioning of devices by managing friction forces and maintaining desired angles without excessive wear, improving operational ease and stability.
Implementation Method 1
The bump is locked in the recession; when the adjuster is positioned in an original position, the engaging portion is engaged with one of the teeth and the bump is locked in the recession
Implementation Method 2
The engaging portion is suitable to be engaged with the teeth... the friction force produced between the stator and the rotor is used to counteract the torque force produced by the weight of the rotating body
Implementation Method 3
The rotator is pivotally connected to the first pivot. The carrier is attached to and pivotable together with the rotator
Data Source
AI summary
An angle-adjustable support includes a base, a carrier and a pivot mechanism. The base includes a sidewall and a bottom. The sidewall has a first pivot and a second pivot. The pivot mechanism pivotally connects the carrier with the base. The pivot mechanism has three working states. The carrier is locked when the pivot mechanism works in a first working state. The carrier is capable of pivoting relative to the base in a clockwise or anticlockwise when the pivot mechanism works in a second working state. The carrier is free to rotate when the pivot mechanism works in a third working state.