Umbrella Handle Mechanism with Internal Armrest Shell
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Solution Overview
Problem
Traditional Roman umbrellas experience unstable armrest connections and inconvenient handling, particularly in rainy or sunny weather, due to the external placement of hand lever parts and the need to stand outside the umbrella for adjustments.
Innovation Solution
A Roman umbrella with an independent handle mechanism featuring a slidably fitted armrest shell within the umbrella column, a rope reel system for easy opening and closing, and a trigger for quick locking and unlocking, allowing for stable and adjustable armrest positioning without needing to stand outside the umbrella.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the armrest shell is positioned externally and connected to the umbrella column, then the structure is simple, but the connection becomes unstable and the umbrella shrinks after being opened for a period of time
Solution Approach 1:
The armrest shell is nested inside the umbrella column, with the armrest shell slidably fitted within the chute formed in the inner side wall of the umbrella column. This nested arrangement protects the connection mechanism while maintaining stability, as the armrest shell is surrounded and supported by the umbrella column structure rather than being externally connected.
2Device complexity
If the hand lever parts are placed outside the umbrella body, then the structure is simple, but it is necessary to stand outside the umbrella for adjustment which is inconvenient in rainy or sunny weather
Solution Approach 1:
The handle base is merged with the armrest shell and positioned inside the umbrella column, combining the functions of the handle mechanism with the internal umbrella structure. The rope reel set is integrated into the handle base, and the trigger mechanism is incorporated into the armrest shell, allowing all control operations to be performed from within the umbrella shelter.
Solution Approach 2:
The rope reel set acts as an intermediary mechanism, transmitting the user's input through the rope to the umbrella tray assembly. The rope extends along the inner cavity of the pull rod to the umbrella tray assembly, allowing force to be transmitted through the internal mechanism without requiring external manual manipulation.
3Ease of operation
If the armrest shell is slidably fitted inside the umbrella column, then adjustment convenience is improved, but the device complexity increases
Solution Approach 1:
The armrest shell is designed with vertical movability along the chute, allowing dynamic adjustment of the armrest position. The slidable fitting enables the armrest shell to move up and down within the umbrella column while maintaining stable connection through the trigger locking mechanism when positioned.
Solution Approach 2:
The trigger mechanism enables the armrest shell to self-lock at the desired position without requiring additional tools or complex locking procedures. The user simply operates the trigger to lock or unlock the armrest shell, and the thimble tightly abuts against the chute to maintain the position.
Data Source
AI summary
An umbrella includes an umbrella column having a top portion hingedly fitted with one end of a connecting rod, and the other end of the connecting rod is hingedly fitted with a pull rod. One side of the umbrella column has a chute, an armrest shell is slidably fitted in the chute, one end of the pull rod is hingedly fitted with an upper umbrella tray, and the other end of the pull rod is fixedly connected to a handle base. The rope reel set is used to wind an umbrella rope, and extends into an umbrella tray assembly along the pull rod. The handle base is hingedly fitted with the armrest shell located at an inner side of the umbrella column and provided for fitting with the chute. The armrest shell is movably positioned along the chute.