Roller Brush Assembly With Hidden Blade for Automatic Hair Cutting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing roller brushes in vacuum cleaners are prone to entanglement with hair and filaments, which reduces dust collection efficiency and can damage the motor and transmission mechanism, and existing solutions for cutting off entangled hair are cumbersome, dangerous, or inefficient.
Innovation Solution
A roller brush assembly with an interior cavity containing serrated barrel bodies and a blade that moves axially using a centrifugal member and elastic recovery part to cut off entangled hair automatically during the starting and stopping of the roller brush, ensuring the blade is hidden when not in use to prevent damage or harm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cutting knife is arranged on the outer housing of the brush for manual cutting, then the wrapped hair can be cut off, but the structure becomes more complex and the operation becomes cumbersome requiring user intervention
Solution Approach 1:
The blade automatically cuts wrapped hair through the rotation of the roller brush itself, eliminating the need for manual user intervention. The roller brush performs the cutting function during its normal operation, making the system self-servicing rather than requiring external user action.
Solution Approach 2:
The cutting function is merged with the roller brush structure by integrating the blade within the roller assembly. The blade and roller brush work together as a unified system where the blade is positioned to contact the roller surface and cut wrapped material during rotation.
2Ease of operation
If a cutting knife is independently arranged on the housing, then cutting function is added, but the cutter becomes easily damaged and dangerous to operate
Solution Approach 1:
The blade is nested within the roller brush structure, specifically housed within a cavity in the roller. This nesting protects the blade from external damage while integrated into the rolling mechanism, making it less vulnerable to damage compared to externally mounted cutters.
Solution Approach 2:
The blade is combined with the roller brush as an integrated assembly rather than a separate component. This merging makes the blade more durable by protecting it within the roller structure and eliminates safety concerns associated with exposed external cutters.
3Extent of automation
If the blade moves axially during rotation, then automatic cutting is achieved, but the structure becomes more complex with driver units
Solution Approach 1:
The blade is designed to move dynamically during the rotation of the roller brush. Instead of a fixed blade, the blade position changes axially as the roller rotates, allowing automatic engagement and disengagement with the wrapped material during different phases of rotation.
Solution Approach 2:
The cutting action occurs periodically during each rotation cycle of the roller brush. The blade engages with wrapped material at specific points in the rotation and disengages at other points, creating a periodic cutting action that achieves automatic cleaning without continuous blade contact.
4Productivity
If the blade is exposed during operation, then cutting efficiency is improved, but user safety and cleaning surface integrity are compromised
Solution Approach 1:
The blade position is dynamic rather than fixed, moving axially during roller rotation. The blade is exposed to cut wrapped material during specific phases of rotation when needed for cutting efficiency, while being retracted or positioned away from the cleaning surface at other times to prevent damage and ensure safety.
Solution Approach 2:
The blade alternates between exposed and retracted positions during rotation cycles. During periods when the blade is exposed, cutting efficiency is improved as it contacts wrapped material. During other periods, the blade is positioned to avoid contact with the cleaning surface, preventing damage and ensuring user safety.
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
The solution provides convenient and efficient automatic cutting of entangled hair, ensuring user safety and maintaining the integrity of the cleaning surface, with the cut hair being drawn into the dust collector, and the structure is simple and less prone to damage.
Implementation Method 1
a driver unit is installed in the interior cavity to make the blade move along the barrel axially to cut the wrapped in the tooth groove. The blade edge is corresponding to the teeth, and the serrated blade is completely hidden in the accommodating space formed by the toothed edges when the roller is in still state to ensure the safety.
Implementation Method 2
the elastic recovery part makes the blade return to the still state with elastic force
Data Source
AI summary
A roller brush assembly comprises a roller and a brush set on the roller. The roller contains an interior cavity constituted by at least two barrel bodies. Each portion of the barrel body edge is serrated shaped, and the adjacent serrated-shaped portions of the barrel both form a blade slot for positioning the serrated-shaped blade, and the blade edge corresponds to the teeth on the serrated shaped edge. A driver unit is installed in the interior cavity to make the blade move along the roller axially to cut the wrapped in the tooth groove automatically when the roller brush is turned on and off.