Vacuum Tube Locking Assembly for Hand-Held Blower Mode Switching
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Solution Overview
Problem
Existing hand-held blowers with vacuum capabilities face challenges in securely attaching and switching between blower and vacuum modes, often requiring users to manually adjust and lock vacuum tube assemblies, which can be cumbersome and inefficient.
Innovation Solution
The design incorporates a housing with a pivotable door and locking mechanism that allows for easy conversion between blower and vacuum modes, using a locking handle and cam system to securely engage and disengage the vacuum tube assembly, and optional latching members to retain the door in specific positions, facilitating efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a vacuum tube assembly is attached to the main body of a blower, then vacuum capability is enabled and user comfort is improved (no bending required), but the attachment mechanism becomes complex and difficult to operate
Solution Approach 1:
The door assembly integrates multiple functions: it serves as the vacuum tube attachment point, the mode switching mechanism, and the intake closure. By combining these functions into a single integrated assembly, the patent reduces the number of separate components and simplifies the overall attachment mechanism while maintaining vacuum capability.
Solution Approach 2:
The door assembly performs multiple functions simultaneously: it attaches the vacuum tube assembly, switches between blower and vacuum modes, and closes the intake opening. This multi-functionality eliminates the need for separate mechanisms for each function, reducing complexity while enabling vacuum operation.
2Reliability
If manual adjustment and locking of vacuum tube assembly is required, then secure attachment is achieved, but user effort increases and operation becomes cumbersome
Solution Approach 1:
The door assembly automatically performs the attachment and securing functions when moved between positions. The vacuum tube assembly attaches and secures itself through the door's movement, eliminating the need for manual adjustment and locking operations by the user.
Solution Approach 2:
The door assembly transitions between dynamic states (open/closed positions) that automatically effect the attachment and securing of the vacuum tube assembly. This dynamic operation replaces static manual locking mechanisms, making operation easier while maintaining secure attachment.
3Reliability
If a locking mechanism is added to retain vacuum tube assembly, then attachment reliability improves, but device complexity increases
Solution Approach 1:
The locking function is merged into the door assembly itself rather than being a separate mechanism. The door's movement and positioning inherently provide the locking action, combining retention functionality with the existing door structure and avoiding additional complex locking components.
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
This solution enables seamless mode switching and secure attachment of the vacuum tube assembly, reducing user effort and improving operational efficiency by ensuring reliable engagement and disengagement of the vacuum mode without the need for extensive manual adjustments.
Implementation Method 1
an impeller mounted within the interior and being operative to rotate such that air is drawn into the interior through the intake and expelled from the interior through the exhaust
Implementation Method 2
a locking mechanism mounted to the housing, the locking mechanism being movable between an unlocked position and a locked position; the locking mechanism being operative to interface with the vacuum tube assembly to retain the outlet end of the vacuum tube assembly in engagement with the intake of the housing
Implementation Method 3
a door pivotable between a closed position, in which the door covers the intake for a blower mode of operation, and an open position, in which the door is positioned for a vacuum mode of operation
Implementation Method 4
a first latching member positioned on the housing; and a second latching member positioned on the housing; the door having a latch operative to selectively retain the door in the open position for the vacuum mode of operation by engaging the first latching member and to selectively retain the door in the closed position for the blower mode of operation by engaging the second latching member
Data Source
AI summary
Hand-held blower devices with vacuum function are provided. In this regard, a representative device includes: a housing defining an interior, an intake and an exhaust; an impeller mounted within the interior and being operative to rotate such that air is drawn into the interior through the intake and expelled from the interior through the exhaust; a locking mechanism mounted to the housing, the locking mechanism being movable between an unlocked position and a locked position; and a vacuum tube assembly having an inlet end and an outlet end and defining an air passageway between the inlet end and the outlet end, the outlet end being operative to engage the intake of the housing for the vacuum mode of operation; the locking mechanism being operative to interface with the vacuum tube assembly to retain the outlet end of the vacuum tube assembly in engagement with the intake of the housing for the vacuum mode of operation.