Ergonomic Volume Control Lever for One-Handed Water Application
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Solution Overview
Problem
Conventional watering equipment requires two hands to operate, making it cumbersome for gardeners to control the volume of water flow due to the placement of volume control mechanisms.
Innovation Solution
A water application device with a volume control lever positioned ergonomically on the rear portion of the main body, allowing the user to control the flow with one hand by using the thumb, eliminating the need for two-handed operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the volume control mechanism is positioned on the applicator head, then the water flow volume can be controlled, but two hands are required for operation making it cumbersome
Solution Approach 1:
The volume control lever is repositioned from the traditional applicator head location to the rear portion of the main body, utilizing the longitudinal dimension of the device. This spatial reconfiguration allows the control mechanism to be accessed by the thumb of the hand holding the device, transforming a two-handed operation into a one-handed operation while maintaining the same control functionality.
2Adaptability or versatility
If different applicator heads are used to control water flow volume, then various flow patterns can be achieved, but the device requires two hands for operation
Solution Approach 1:
The rear-positioned volume control lever serves multiple functions: it controls water flow volume, enables one-handed operation, and works with any applicator head type. This universal control mechanism eliminates the need for hand switching between holding the device and adjusting the applicator head, while maintaining adaptability across different applicator configurations.
3Ease of operation
If the volume control lever is positioned for easy one-hand access, then ergonomic design is improved, but the device structure becomes more complex
Solution Approach 1:
The volume control lever is extracted from the applicator head assembly and positioned independently on the rear portion of the main body. This separation allows the control mechanism to be optimally positioned for ergonomic access by the thumb, while the applicator head retains its original functionality without being constrained by control mechanism placement.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A water application device may include a main body, a flow control assembly, an operable member and an applicator head. The main body may be graspable along a handle portion thereof by an operator. The handle portion may include a back portion configured to be held toward the operator during water application. The flow control assembly may be housed in the main body and may include a volume control assembly to control volume of flow of water through the device. The operable member may be attachable to a front of the handle portion to interface with the flow control assembly to alternately start and stop flow based on a position of the operable member. The applicator head may be attachable to an outlet of the main body to apply water passing through the applicator head based on an application characteristic of the applicator head. A planar surface may be provided at the back portion. The planar surface lies in a plane intersecting a longitudinal centerline of the back portion at a point along a length of the back portion. The planar surface may define at least part of a range of motion of a flow control lever of the volume control assembly.