Shower Head Ratchet Switching for One-Hand Spray Selection
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Solution Overview
Problem
Existing shower head designs require users to use both hands and exert significant force to switch water outlet ways, causing inconvenience.
Innovation Solution
A shower head structure with a ratchet wheel system that allows single-hand operation by using a key to slide a connecting rod, which rotates the water distributing disc, facilitated by a reset elastic member to reduce pressing force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional toggle switch with a knob is used on the water outlet panel, then the water outlet way can be switched, but the resistance is large and both hands are required to operate, which brings inconvenience to users
Solution Approach 1:
The patent introduces a key as an intermediary tool to operate the ratchet wheel mechanism. The key converts rotational motion into linear motion of the connecting rod, which then rotates the water distributing disc. This intermediary mechanism reduces the direct force required by the user compared to turning a traditional knob directly
Solution Approach 2:
The ratchet wheel mechanism employs periodic action through its toothed structure. Each tooth engagement with the pawl creates discrete, controlled steps of rotation for the water distributing disc. This periodic engagement allows the system to accumulate rotational motion in small increments, reducing the peak force required compared to continuous rotation
2Ease of operation
If a ratchet wheel mechanism with a key is used to switch water outlet ways, then one hand operation is enabled and operational force is reduced, but the device structure becomes more complex
Solution Approach 1:
The key serves multiple functions: it acts as a lever to amplify user force, converts rotational motion to linear motion of the connecting rod, and engages with the ratchet wheel to control the direction of rotation. This multi-functionality of a single component helps offset the added complexity by consolidating several functions into one element
Solution Approach 2:
The connecting rod is designed to slide within the shell assembly, providing dynamic motion conversion. The rod transforms the rotational motion of the key into linear reciprocating motion that drives the ratchet wheel. This dynamic mechanism allows for compact packaging of the motion conversion functions, reducing overall spatial 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
Enables convenient and efficient one-hand switching of water outlet ways with reduced user effort, enhancing the overall user experience.
Implementation Method 1
when the connecting rod is slid along the driving direction, the reset elastic member stores elastic potential energy for driving the connecting rod to reset
Data Source
AI summary
Shower head structure and shower device includes shower head body, water distributing disc, ratchet wheel, key, connecting rod and reset elastic member. Shower head body includes shell assembly and flow dividing assembly, where multiple groups of water inlets are disposed in and water distributing disc is rotationally mounted on. Water passing holes communicated with one group of water inlets every time are disposed on water distributing disc. Ratchet wheel is fixedly connected to side of water distributing disc away from flow dividing assembly. Key has first end hinged to shell assembly and second end telescopically disposed relative to one side of shell assembly. Connecting rod is slidably disposed in shell assembly and in transmission connection between second end and ratchet wheel. Key drives connecting rod. Reset elastic member has one end connected to shower head body and other end acting on connecting rod. Reset elastic member drives connecting rod.