Drawing Faucet Position Sensing and Water Control
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Solution Overview
Problem
Existing drawing faucets have a single control strategy that causes water to be sprayed everywhere during use, affecting user experience and water saving, as the water is turned on as soon as the shower head is pulled out and turned off immediately upon reset.
Innovation Solution
A drawing faucet with a retractable drawing hose featuring at least two sense marks and a sensor that generates different sensing signals based on the movement of these marks, allowing for flexible control strategies to manage water discharge, including delaying the start of water flow and ensuring it is turned off only after the shower head is fully reset.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single magnetic activation mechanism is used to control water discharge, then the structure is simple, but water is sprayed everywhere during use affecting user experience and water saving
Solution Approach 1:
The patent divides the single control mechanism into multiple independent magnetic activation mechanisms (first and second magnetic activation mechanisms) positioned at different locations on the drawing hose. Each mechanism corresponds to a specific position marker and controls water discharge independently, allowing precise control of water flow during different stages of the drawing process, thereby preventing water spraying while maintaining reasonable structural complexity
Solution Approach 2:
The patent implements preliminary action by using the first magnetic activation mechanism to activate the water discharge control valve before the shower head is fully pulled out (when the first position marker passes the sensor). This ensures water is ready to flow smoothly, preventing sudden spraying. The second mechanism then deactivates the valve when the shower head is fully extended, ensuring controlled discharge throughout the drawing process
2Speed
If water is turned on as soon as the shower head is pulled out, then the response is immediate, but water is sprayed everywhere during the drawing process
Solution Approach 1:
The system performs preliminary action by activating the water discharge control valve in advance when the first position marker passes the sensor during the drawing process, before the shower head is fully pulled out. This gradual activation prevents sudden water release and spraying, while still ensuring water is available when needed. The valve remains active throughout the drawing process and is deactivated only when the second position marker passes the sensor, ensuring controlled discharge
Solution Approach 2:
The patent implements dynamic control by using two magnetic activation mechanisms that activate and deactivate the water discharge control valve at different stages of the drawing process. The valve state changes dynamically based on the position of the shower head, transitioning from off to on and back to off, thereby adapting water discharge to the actual usage needs and preventing water spraying
3Device complexity
If a single sense mark is used for control, then the sensing structure is simple, but the control strategy is insufficient to prevent water spraying
Solution Approach 1:
The patent segments the single sense mark into two distinct position markers (first and second position markers) positioned at different locations on the drawing hose. Each marker triggers a specific magnetic activation mechanism at different stages of the drawing process. This segmentation allows the system to distinguish between different operational phases (drawing, extended, resetting) and control water discharge accordingly, significantly improving control reliability while maintaining reasonable sensing structure complexity
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 provides a more flexible and effective control strategy that prevents water from being sprayed during use, ensuring it is only turned on when needed and turned off after the shower head is fully reset, enhancing user experience and promoting water saving.
Implementation Method 1
The sense mark is made of permanent magnet material, the sensor is a magnetic switch
Implementation Method 2
The magnetic induction device includes a Hall element and a magnetic activation mechanism that activates the Hall element
Data Source
AI summary
A drawing faucet includes a drawing sensing structure. The drawing sensing structure includes sense marks and a sensor. The number of the sense marks is at least two, they are provided on the drawing hose at intervals along a length direction of the drawing hose. The sensor is configured to sense the movements of the sense marks. During a drawing process of the drawing hose, at least the sense marks at two ends along the length direction can follow the movement of the drawing hose and be sensed by the sensor. The automatic water discharge control unit correspondingly controls the water discharge to change the water discharge strategy according to the sensing signal of the sensor.