Ratchet Hanger for LCD Angle Adjustment
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Solution Overview
Problem
Large LCDs require frequent dismounting and re-mounting to adjust the inclined angle due to insufficient friction, which is inefficient and cumbersome.
Innovation Solution
A hanger design featuring a base, pivoting bracket, ratchet with inclined teeth, and a reset plate that allows adjustable angle positioning by engaging and disengaging the stopper with the teeth, using a bias element like a compression spring to maintain engagement, enabling easy adjustment and secure locking of the angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If friction-based positioning is used for large LCDs, then the LCD can be mounted on the wall, but the positioning becomes unstable and requires frequent dismounting and re-mounting to adjust the angle
Solution Approach 1:
The system transitions from a static friction-based positioning to a dynamic ratchet mechanism that allows the bracket to rotate freely in one direction (clockwise) while being locked in discrete positions in the opposite direction. This enables easy angle adjustment by simply rotating the bracket, with the ratchet automatically locking into place, eliminating the need for dismounting and re-mounting.
Solution Approach 2:
The ratchet mechanism acts as an intermediary between the bracket and the base, providing a mechanical locking system that translates continuous rotation into discrete stable positions. The inclined teeth of the ratchet engage with the stopper to maintain the bracket at specific angles while allowing easy adjustment to other angles.
2Productivity
If manual friction-based positioning is used, then the structure remains simple, but the adjustment process becomes time-consuming and inefficient
Solution Approach 1:
The positioning function is segmented into discrete angular positions defined by the ratchet teeth, allowing the bracket to be quickly adjusted to predefined angles. This segmentation enables fast adjustment without requiring complex continuous control mechanisms.
Solution Approach 2:
The ratchet mechanism is self-locking, automatically engaging the stopper with the inclined teeth when the bracket is rotated counterclockwise. This self-service feature eliminates the need for additional locking operations or complex control systems, maintaining structural simplicity while dramatically improving adjustment efficiency.
3Ease of operation
If the bracket is designed to rotate freely for easy adjustment, then angle change becomes convenient, but the bracket cannot maintain the set angle
Solution Approach 1:
The ratchet teeth are pre-configured with inclined surfaces that automatically engage the stopper when the bracket is rotated counterclockwise. This preliminary action ensures that as soon as the bracket reaches a desired angle, the ratchet mechanism automatically locks it in place, maintaining the set angle without requiring additional locking operations.
Solution Approach 2:
The one-way rotation characteristic, which initially seemed to limit positioning capability, is converted into a benefit by using the rotation direction itself as the locking mechanism. Counterclockwise rotation engages the lock, while clockwise rotation releases it, transforming a potential limitation into an efficient adjustment and locking system.
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 secure and adjustable positioning of large LCDs without the need for frequent dismounting, allowing for precise angle adjustments from 0° to 20° and maintaining the set angle, enhancing usability and convenience.
Implementation Method 1
The second link further comprises a bias element biasing the stopper, thereby maintaining engagement of the stopper and the teeth. The bias element is preferably a compression spring.
Implementation Method 2
a first link pivoting on the base and comprising a ratchet with a plurality of teeth
Data Source
AI summary
A hanger for an electronic apparatus. The hanger comprises a base mounted to a wall, a bracket pivoting on the base, a first link pivoting on the base and comprising a ratchet with a plurality of teeth, and a second link with a stopper rotatably connecting the first link and the bracket. The angle between the bracket and the base is varied by the stopper engaging each tooth of the ratchet. The bracket can rotate between a first position and a second position. When the bracket is in the first position, the bracket overlaps the base, and in the second position, the angle between the bracket and the base is maximized.