Floor Nozzle with Movable Pivot Axis for Stable Carpet Cleaning
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Solution Overview
Problem
Existing floor nozzles for vacuum cleaners with two articulation axes for tilting movements are complex to assemble and often experience undesired tilting during backward movement, especially on high-pile carpet surfaces, which can compromise effective cleaning.
Innovation Solution
A floor nozzle design with a single pivot axis that moves between two horizontal working positions, adjusting its position to optimize alignment with the floor surface during both forward and backward movements, utilizing compressive and tensile forces to maintain stability and prevent tilting, and incorporating a flexible fluid connection to compensate for relative movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a floor nozzle is designed with two articulation axes for tilting movements, then the nozzle body can be optimally aligned with the floor surface during forward movement, but the structural complexity and assembly difficulty increase significantly
Solution Approach 1:
The patent extracts one of the two articulation axes from the design, retaining only a single pivot axis that connects the nozzle body to the carrier. This simplification eliminates the complexity of two articulated axes while maintaining the essential tilting functionality needed for optimal alignment during forward movement.
Solution Approach 2:
The single pivot axis is designed to be movable between two working positions rather than fixed. This dynamic characteristic allows the pivot axis to adapt its position based on operational requirements, enabling optimal alignment during both forward and backward movements without requiring a complex two-axis articulated structure.
2Stability of the object's composition
If a floor nozzle is designed with two articulation axes, then tilting movements are controlled during forward movement, but undesired tilting occurs during backward movement on high-pile carpets
Solution Approach 1:
The movable pivot axis between two working positions dynamically adjusts based on the direction of movement and floor conditions. During backward movement on high-pile carpets, the pivot axis shifts to the second working position that prevents undesired tilting, thereby maintaining cleaning effectiveness without requiring a complex two-axis system.
Solution Approach 2:
The position of the pivot axis is changed between two working positions depending on operational conditions. This parameter change allows the system to optimize tilting control for different movement directions and floor surfaces, preventing undesired tilting during backward movement while maintaining stability during forward movement.
3Device complexity
If the pivot axis is fixed in position, then the structure is simpler, but the nozzle body cannot maintain optimal alignment during both forward and backward movements
Solution Approach 1:
Instead of a fixed pivot axis, the invention employs a movable pivot axis that can shift between two working positions. This dynamic feature enables the single-axis structure to achieve alignment optimization for both forward and backward movements, combining structural simplicity with operational flexibility.
Solution Approach 2:
The single movable pivot axis serves multiple functions: it enables optimal alignment during forward movement at one working position and prevents undesired tilting during backward movement at the second working position. This multi-functionality allows a simple single-axis structure to perform what would traditionally require a complex two-axis system.
Data Source
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AI summary
The invention relates to a floor nozzle for vacuum cleaners with a nozzle body (1) which has a base-side contact surface (2) with a suction mouth (3) and a suction channel (4) for diverting a stream of suction air flowing into the suction mouth, and with a carrier (5) . The carrier (5) has a connecting element (6) for a suction tube (7) and is connected to the nozzle body (1) so that it can pivot about a pivot axis (8). A fluid connection (9) is also provided between the connection element (6) and the suction channel (4). Compressive and tensile forces act alternately on the connecting element (6) when the floor nozzle is moved forwards and backwards over a floor surface by means of a suction pipe (7) connected to the connecting element (6). According to the invention, the pivot axis (8) can be moved between two horizontally spaced working positions (I, II), the pivot axis (8) in a first working position (I), which is set as a result of a compressive force acting on the connection element (4), having one has a smaller distance to the suction mouth (3) than in a second working position (II), which occurs as a result of a tensile force acting on the connection element (6).