Retractable Dog Leash Gravity Locking Mechanism
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Solution Overview
Problem
Existing retractable dog leashes are often cumbersome and prone to fouling or breaking due to flimsy parts, making them difficult to operate effectively.
Innovation Solution
A retractable dog leash featuring a cylindrical housing with a spring-loaded retraction device, a gravity locking mechanism, and a magnetic-locking attachment clip, designed to provide a sturdy and easy-to-use solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a retractable leash mechanism is used, then the leash length is adjustable and convenient for dog walking, but the mechanism becomes cumbersome and parts become flimsy leading to fouling or breaking
Solution Approach 1:
The patent replaces the traditional mechanical spring-reel system with a linear compression spring mechanism that guides the cord through a housing. This substitution eliminates the complex rotating reel assembly that was prone to fouling and breaking, while maintaining the retractable functionality through a simpler linear motion system.
Solution Approach 2:
The patent changes the operational parameters of the retractable mechanism by using a linear compression spring instead of a rotary spring reel. This parameter change from rotational to linear motion simplifies the mechanism, reduces part complexity, and improves reliability while preserving the adjustable leash length capability.
2Ease of operation
If traditional retractable mechanisms are used, then the leash can retract, but the parts become flimsy and difficult to operate
Solution Approach 1:
The patent extracts and removes the complex rotating reel assembly from the retractable mechanism, retaining only the essential linear spring and cord guidance components. This extraction simplifies the overall device structure, making it easier to operate while eliminating the flimsy parts associated with traditional reel mechanisms.
Solution Approach 2:
The patent substitutes the complex mechanical reel system with a simpler linear spring mechanism. This replacement reduces device complexity by eliminating multiple moving parts, bearings, and rotational components, resulting in a more straightforward operation and improved ease of use.
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 leash offers a sturdy and user-friendly operation, with the spring-loaded retraction device and gravity locking mechanism ensuring reliable functionality and the magnetic-locking attachment clip providing secure attachment to a dog collar.
Implementation Method 1
a linear compression spring is positioned between the spring-loaded retraction device and the front cover
Implementation Method 2
The spring-loaded retraction device includes a gravity locking device for locking the dog leash
Implementation Method 3
a magnetic-locking attachment clip providing secure attachment to a dog collar
Data Source
AI summary
A retractable dog leash. The dog leash includes a cylindrical housing having a housing front cover and housing rear cover. A spring-loaded retraction device is positioned in the housing adjacent to the rear cover and a linear compression spring is positioned between the spring-loaded retraction device and the front cover. The spring-loaded retraction device includes a gravity locking device for locking the dog leash. A cord is connected to the spring-loaded retraction device and a dog collar connection device is connected to the cord.