Spray Mop Handle Assembly for User-End Volume Adjustment
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Solution Overview
Problem
Conventional spray mops require users to bend down to adjust the spray volume and lack a reliable, inexpensive mechanism for modifying the spray pattern, as adjustments are typically made at the distal end and do not allow for convenient control of liquid release or pattern modification at the user end.
Innovation Solution
A spray mop design featuring a handle assembly with a rotatable lever and a mode control knob that adjusts the longitudinal movement of a rod to control the spray volume, combined with a rotatable collar to select between different spray nozzles for varying patterns, allowing users to adjust the spray volume and pattern from the proximal end without limiting lever travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If spray volume adjustment is made at the distal end of the shaft, then the spray device can be adjusted, but the user must bend down to make adjustments which reduces ease of operation
Solution Approach 1:
The patent inverts the conventional adjustment location from the distal end (spray device) to the proximal end (handle assembly). The mode control knob and lever engagement surfaces are positioned at the handle assembly, allowing users to adjust spray volume and pattern without bending down, thereby improving ease of operation while maintaining adjustment functionality.
2Ease of operation
If a mechanism is added to adjust spray volume at the proximal end, then ease of operation improves, but the device complexity increases
Solution Approach 1:
The mode control knob serves multiple functions: it selects between different spray volumes (first, second, and third positions) and different spray patterns (first and second patterns). By consolidating these adjustment functions into a single control mechanism at the handle assembly, the patent improves ease of operation without proportionally increasing device complexity.
Solution Approach 2:
The lever is designed with multiple engagement surfaces that can selectively engage with the rod at different positions. This dynamic engagement system allows the lever to accommodate variable rod movements corresponding to different spray volumes while maintaining a consistent user interface, thereby improving ease of operation without significantly increasing complexity.
3Ease of operation
If the lever travel is limited to accommodate spray volume adjustment, then spray volume control improves, but the lever action consistency deteriorates
Solution Approach 1:
The lever maintains consistent rotational movement through its full range of motion regardless of the selected spray volume. The multiple engagement surfaces are positioned such that the lever always travels the same angular distance, ensuring consistent lever action. The rod movement varies to control spray volume, but the lever's user interface remains stable and predictable.
4Adaptability or versatility
If a reliable mechanism for modifying spray pattern is added, then adaptability improves, but device complexity increases
Solution Approach 1:
The mode control knob simultaneously controls both spray volume (first, second, third positions) and spray pattern (first and second patterns). This multi-functional control mechanism provides adaptability for different cleaning applications while avoiding the complexity of separate controls for volume and pattern adjustment.
Data Source
AI summary
A cleaning device includes a shaft, a cleaning element mounted at a distal end of the shaft, a spray device mounted near the distal end of the shaft, a handle assembly mounted at a proximal end of the shaft, and a rod. The spray device includes a liquid reservoir, a pump and a nozzle. The handle assembly includes a lever rotatable about a pivot point with first and second engagement surfaces of different distances from the pivot point, and a knob having a cam surface and rotatable between first and second positions. The rod extends between the pump and the lever. The knob cam surface is engaged with the rod for aligning a first end of the rod to the first engagement surface with the knob in the first position and aligning the first end of the rod to the second engagement surface with the knob in the second position.