Arm Cuff Leash With O-Ring Pulley for Strong Dogs
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Solution Overview
Problem
Conventional pet leashes fail to provide effective control over strong-pulling dogs, leading to injuries and discomfort for owners, as they rely on material strength rather than efficient force distribution using human body mechanics.
Innovation Solution
A leash design that incorporates a cuff around the user's arm, with leash material running through an O-ring pulley system, distributing the pulling force across the user's shoulder and back muscles, thereby enhancing control and reducing strain on the wrist and hand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional leash material is strengthened (thicker nylon or leather), then the leash can withstand stronger pulling forces, but the leash still does not provide effective control and the user's wrist and hand remain vulnerable to injury
Solution Approach 1:
The invention transitions the force-bearing mechanism from a one-dimensional hand grip to a two-dimensional shoulder-based support system. The leash attaches to the shoulder rather than the hand, distributing pulling forces across the shoulder and upper back area, thereby removing the wrist and hand from the primary force transmission path and eliminating the vulnerability to wrist injuries.
Solution Approach 2:
The shoulder acts as an intermediary between the leash and the user's body. Instead of the hand directly承受ing the pulling force, the shoulder serves as a mediating structure that can better distribute and manage the forces, preventing direct transmission to vulnerable wrist and hand joints.
2Ease of operation
If a choke collar is used to control the dog, then the dog stops pulling to reduce the sensation, but the method is harmful to the dog and owners do not consider it an option
Solution Approach 1:
The invention extracts the control mechanism from the dog's neck area (where choke collars apply harmful pressure) and relocates it to the user's shoulder. This separates the control function from the dog's body, eliminating the harmful choking effect while maintaining the user's ability to control the dog's pulling behavior through proper body mechanics.
3Object-affected harmful factors
If a harness is used instead of a collar, then pulling is reduced since dogs respond quicker, but the complex series of straps and buckles are difficult to put on each time
Solution Approach 1:
The invention extracts the control function from the dog's body (collar or harness) and places it on the user's shoulder. This simplifies the dog's equipment while maintaining control, as the user's body mechanics provide the control mechanism rather than complex dog-worn devices.
4Ease of operation
If the user holds the leash loop like a handle, then the force is held by the fingers, but this does not give sufficient control over a strong pulling dog and can cause injuries
Solution Approach 1:
The invention fundamentally changes the dimension of force application by moving from hand-based gripping (small surface area, vulnerable joints) to shoulder-based support (larger surface area, stronger muscle groups). This dimensional shift allows the user to handle strong-pulling dogs safely by utilizing the shoulder's greater strength and stability.
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 design allows for better control of strong-pulling dogs without risking injury, utilizing the user's natural body mechanics to distribute the force effectively, reducing the risk of injuries and providing a safer walking experience.
Implementation Method 1
Attached to the cuff are a few feet of leash material that freely runs through an O-ring and ends in a handle. Attached to the O-ring are another few feet of leash ending with a clip that can go to a dog collar. When the dog pulls, the user pulls the handle backwards. The resulting force goes through the O-ring, which is acting as a pulley and on to the cuff and body appendage
Data Source
AI summary
A leash that allows any individual to control a pulling dog without risking injury or walking in an unsafe manner. The disclosed leash maximizes body mechanics and basic pulley/lever principles to achieve more strength. The leash comprises a cuff that preferably wraps around a user's arm above the elbow. Attached to the cuff are a few feet of leash material that freely runs through an O-ring and ends in a handle. Attached to the O-ring are another few feet of leash ending with a clip that can go to a dog collar. When the dog pulls, the user pulls the handle. The resulting force goes through the O-ring, which acts as a pulley and on to the arm cuff and back of the arm, utilizing stronger shoulder and back muscles. Therefore the user is able to pull back with a lot more force than is obtainable with a typical leash.