Movable Wheel Carriage for Upright Vacuum Maneuverability
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Solution Overview
Problem
Conventional upright vacuum cleaners are difficult to maneuver, especially when changing direction, due to their limited articulation between the base and upper body, which restricts ease of movement and steering.
Innovation Solution
A vacuum cleaner design featuring a pivotally connected handle with a movable wheel system that adjusts its wheel position based on the handle's movement from a parked to an operating position, allowing for increased maneuverability by changing the wheel's distance from the base air inlet, and incorporating a drive mechanism on the handle to facilitate this adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the vacuum cleaner uses a fixed wheel position on the base, then the structure is simple and stable, but the maneuverability and ease of steering are poor
Solution Approach 1:
The wheel system is made movable relative to the base, allowing the wheel position to dynamically adjust as the handle pivots between parked and operating positions. This dynamic adjustment improves maneuverability without requiring a completely complex reconfiguration system, as the movement is coupled to the natural handle pivoting motion.
Solution Approach 2:
The wheel position adjustment is automatically coupled to the handle pivoting motion. As the user naturally pivots the handle to transition between parked and operating positions, the wheel system self-adjusts its position without requiring separate control mechanisms, making the system serve itself through the primary user action.
2Ease of operation
If the wheel carriage is positioned far from the base air inlet, then the base structure is stable, but the ability to change direction is limited
Solution Approach 1:
The wheel carriage position is made dynamic, allowing it to move between a first position (farther from air inlet) and a second position (closer to air inlet) based on handle position. This enables the base to have different effective configurations for stability versus maneuverability depending on the operating state.
Solution Approach 2:
The physical parameter of wheel carriage position relative to the base air inlet is changed based on operational needs. By adjusting this position parameter in response to handle pivoting, the system optimizes both stability and direction-changing ability as required by the operational context.
3Ease of operation
If the handle is rigidly connected to the base, then the structural integrity is high, but the maneuverability and steering ease are reduced
Solution Approach 1:
The connection between handle and base is made pivotal rather than rigid, allowing controlled rotation between parked and operating positions. This dynamic connection maintains structural integrity through the pivot joint while enabling the handle to move freely for improved steering and maneuverability.
Solution Approach 2:
The rigid connection is segmented into a pivotal connection, allowing independent movement of the handle relative to the base. This segmentation enables the handle to pivot for steering purposes while the base remains structurally sound, separating the functions of structural support and maneuverability control.
Data Source
AI summary
A vacuum cleaner having a base with an air inlet, a handle, a base pivot connecting the base to the handle to permit the handle to pivot between an upright parked position and a reclined operating position, a movable wheel system and a wheel system drive member. The wheel system has a wheel carriage pivotally connected at one end to the base, and at least one wheel connected to the other end. The wheel carriage pivots between a first position in which the wheel is further from the air inlet, and a second position in which the wheel is closer to the air inlet. The drive member is on the handle and positioned to contact the wheel carriage as the handle moves from the upright parked position to the reclined operating position to thereby move the wheel carriage from the first position to the second position.