Suction Head Rotating Brush Unlocking System for Tool-Free Maintenance
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Solution Overview
Problem
Existing suction devices with rotating brushes for vacuum cleaners often require tools to access and maintain the brushes, and previous solutions using elastic levers or hooks are fragile and prone to breakage.
Innovation Solution
A reversible unlocking system with retractable lugs mounted on an actuator, allowing the rotary brush to be removed along the longitudinal axis without projecting fragile parts, using a rotary, push-button, or pinching actuator for compact and solid design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If elastic levers or hooks are used for unlocking the rotating brush, then the brush can be removed without tools, but the unlocking system becomes fragile and prone to breakage
Solution Approach 1:
The unlocking system uses a dynamic spring-loaded lever that can deflect and absorb impact forces. The lever is designed to flex under load and return to its original position, transforming static fragile components into dynamic resilient elements that can withstand accidental drops and misuse without breaking.
Solution Approach 2:
The spring element pre-stores elastic energy to cushion against impact forces. When the brush or housing is accidentally dropped, the spring absorbs the shock energy, preventing the locking lever from breaking. This beforehand cushioning protects the fragile unlocking components from damage before failure can occur.
2Ease of operation
If the unlocking lever protrudes from the roller brush to enable extraction, then the brush can be easily removed, but the protruding part becomes vulnerable to breakage upon accidental drops
Solution Approach 1:
The lever is designed as a dynamic component that can deflect and move during impact events. Rather than being a rigid protruding element that would break on impact, the spring-loaded lever can absorb shock through elastic deformation, maintaining its functionality while protecting against breakage from accidental drops.
Solution Approach 2:
The lever's physical parameters are optimized to balance protrusion length for ease of operation with sufficient thickness and material properties to resist breakage. The spring constant and lever geometry are specifically designed to provide adequate strength while maintaining the necessary extraction capability.
3Strength
If screws are used to secure the soleplate and rotating brush, then the assembly is strong and secure, but tool-free maintenance becomes impossible
Solution Approach 1:
The spring-loaded lever creates a self-servicing unlocking mechanism that automatically disengages when actuated. The user simply needs to press the lever to release the locking action, and the spring automatically returns the lever to its locked position after brush installation, eliminating the need for tools while maintaining secure attachment.
Solution Approach 2:
The locking function is segmented into distinct components: the lever for actuation, the spring for energy storage and return, and the locking surfaces for engagement. This segmentation allows the system to provide both strong mechanical attachment and easy tool-free operation through coordinated action of separate elements.
Data Source
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AI summary
The suction head (10) comprises a housing (12) and a rotating brush mounted for rotation by means of a shaft, with a longitudinal axis (23), supported by bearings between two lateral walls (13) of said housing (12), said rotating brush being made removable along said longitudinal axis (23) by means of a reversible unlocking system (30) located in one of the lateral walls (13) of the housing (12). The unlocking system (30) comprises at least one retractable lug movably mounted on an actuator.