Window Squeegee Blade Retention for Safe Spatula Replacement
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Solution Overview
Problem
Window squeegees face issues with dirt accumulation on the cleaning blade, leading to re-soiling during cleaning and the need for quick and safe blade replacement, especially in unstable conditions like cleaning skyscraper windows.
Innovation Solution
A window squeegee design featuring a handle with a bushing and connection elements, including a locking mechanism and elastic means, allows for safe and easy spatula replacement without removing the blade from the head, even when wet, and accommodates multiple blade profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cleaning blade is made removable and replaceable, then the ease of replacement is improved, but the risk of blade falling and causing safety hazards increases
Solution Approach 1:
The patent implements a retention mechanism that maintains engagement between the spatula and head connection elements throughout the replacement process. The retention protrusions on the head engage with corresponding retention recesses on the spatula holder, preventing the spatula from detaching accidentally during replacement operations at height.
Solution Approach 2:
The connection elements act as intermediaries between the spatula holder and head. These elements include engagement protrusions and retention features that mediate the connection, allowing controlled attachment and detachment while preventing unintended release during the replacement process.
2Productivity
If the connection mechanism is simplified for quick replacement, then the productivity is improved, but the manufacturing precision required for reliable connection decreases
Solution Approach 1:
The connection mechanism is segmented into discrete engagement features: protrusions on the head that engage with recesses on the spatula holder. This segmentation allows for modular assembly with tolerance compensation, enabling quick replacement while maintaining reliable connection through distributed contact points rather than requiring single-point precision.
3Adaptability or versatility
If the spatula holder is designed to accommodate multiple blade profiles, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The spatula holder and connection elements are designed with universal engagement features that can accommodate multiple spatula profiles. The retention protrusions and recesses are configured to work with various blade types without requiring different connection mechanisms, achieving multi-functionality through standardized interface design.
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 quick, safe, and efficient spatula replacement, preventing hazardous falls and re-soiling, while maintaining effective surface cleaning without complex maintenance, and allowing user-preferred blades.
Implementation Method 1
elastic means constantly affecting said second and third connection elements
Data Source
AI summary
A window squeegee (1) for cleaning surfaces, such as skyscraper windows, comprises a handle (2) associated to a head (11) provided with a first connection element (12) and a second connection element (18) for connecting a spatula (46) to the handle (2). In a condition of normal use of the window squeegee, the spatula (46) is held between the first element (12) and the second element (18) and in a condition of replacement of the spatula, the second element (18) is rotated by the first element (12) to allow the replacement of the spatula (46) which is held associated to the head (11) of the window squeegee and is not free to remove, to ensure a safe replacement.