Mechanical Bathtub Safety Device with Float-Actuated Drain Control
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Solution Overview
Problem
Existing bathtub safety devices, such as automatic water level controls and alarms, are complex, bulky, and prone to electrical failures, while bathtub seats and rings provide a false sense of security, increasing the risk of drowning, especially for infants, as they can be distracting and may malfunction or be unsuitable for various bathtub sizes.
Innovation Solution
A simple, durable, battery-free bathtub safety device that adjusts the water level by inserting a base section into the drain and using a rotatable water discharge adjustment ring with multiple holes to set the desired water level, ensuring the tub drains if detached, thus preventing excessive water levels without occupying significant bathtub space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic water level controls are used, then water level can be regulated, but the device becomes complex and bulky
Solution Approach 1:
The device is segmented into three functional components: a float indicator that rises and falls with water level, a rod mechanism that translates float movement to drain control, and a stop mechanism that prevents over-draining. This segmentation allows each component to perform a specific function simply, avoiding complex integrated systems while achieving reliable water level control.
2Extent of automation
If electrical means are used for water control, then automation is achieved, but the device becomes bulky and inappropriate for baby skin contact
Solution Approach 1:
The patent replaces electrical automation with a purely mechanical system. The float automatically rises and falls with water level changes, mechanically actuating the rod to open or close the drain without any electrical components. This mechanical substitution eliminates bulkiness and safety concerns while maintaining automatic water level control functionality.
3Ease of operation
If bathtub seats or rings are used, then a sense of security is provided, but the risk of drowning increases due to false security
Solution Approach 1:
The device provides passive, self-regulating water level control that requires no active user intervention during bathing. The float automatically responds to water level changes and controls drainage, eliminating the need for parents to constantly monitor or adjust seats/rings. This removes the false security problem while maintaining ease of use through automatic operation.
4Productivity
If water level is increased for thorough bathing, then cleaning effectiveness improves, but drowning risk increases
Solution Approach 1:
The float provides continuous visual feedback of the current water level through its position relative to the tub wall. When water reaches a safe level, the float rises to indicate this, allowing parents to stop filling. This feedback mechanism enables thorough bathing when needed while preventing dangerous overfilling, as the visual indicator makes water level status immediately apparent.
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
The device maintains a safe water level, is fail-safe, and adaptable to different ages and bathtub sizes, reducing the risk of drowning while being easy to use and maintain, without the risks associated with electrical components or false security from seats and rings.
Implementation Method 1
a float indicator responsive to water level changes in the tub
Implementation Method 2
a rod having one end operably connected to the float indicator and the other end operably connected to the drain opening
Data Source
AI summary
A bathtub safety device which prevents the water level in a bathtub from exceeding a desired level is described herein. This device is relatively simple and does not require a battery. This bathtub safety device is comprised of (1) a base section having a bathtub drain coupling which is adapted for insertion into a bathtub drain in a watertight manner and a vertically mounted water discharge tube having a water discharge slit, and (2) a water discharge adjustment ring having a series of water discharge holes which are arranged at different vertical heights and which are spaced apart radially along the circumference of the inside diameter of the water discharge adjustment ring, wherein the water discharge adjustment ring is positioned over the water discharge tube and is capable of being rotated radially on the water discharge tube.