Dog Leash Structure With Rigid Section to Prevent Leg Tangling

Solution Overview

Problem

Existing dog leashes often tangle with the dog's legs during walks, causing inconvenience and potential injury, necessitating frequent untangling by the walker.

Innovation Solution

A leash design featuring a stiff leash portion with a rigid rod inside a sleeve and a flexible loop portion, along with a removable belt attachment, to prevent entanglement and provide better control over the dog.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a flexible leash is used, then the leash is easy to handle and comfortable for the user, but the leash tangles with the dog's legs during walks

Engineering Contradiction:

Improveease of handlingVSAvoidentanglement

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The leash is divided into two distinct segments: a flexible portion for user handling and a stiff portion for preventing entanglement. This segmentation allows each portion to perform its specific function optimally without interfering with the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the leash have different physical properties - the first portion is flexible for comfort, while the second portion is stiff for functionality. This local differentiation of quality resolves the contradiction by giving each part the property it needs for its specific role.

Inventive Principle:

Principle #3Local quality

2Object-generated harmful factors

If a stiff leash is used, then the leash prevents entanglement with the dog's legs, but the leash is difficult to handle and less comfortable for the user

Engineering Contradiction:

Improveentanglement preventionVSAvoidease of handling

Core Design Contradiction:

Object-generated harmful factorsVSEase of operation

Solution Approach 1:

The leash is divided into two distinct segments: a flexible portion for user handling and a stiff portion for preventing entanglement. This segmentation allows each portion to perform its specific function optimally without interfering with the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the leash have different physical properties - the first portion is flexible for comfort, while the second portion is stiff for functionality. This local differentiation of quality resolves the contradiction by giving each part the property it needs for its specific role.

Inventive Principle:

Principle #3Local quality

3Device complexity

If a traditional leash design is used, then the structure is simple, but the leash requires frequent untangling and reduces walking productivity

Engineering Contradiction:

Improvestructural simplicityVSAvoidwalking efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The leash is divided into two distinct segments: a flexible portion for user handling and a stiff portion for preventing entanglement. This segmentation allows each portion to perform its specific function optimally without interfering with the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The physical parameter of stiffness is changed for the second portion of the leash, transforming it from flexible to stiff. This parameter change prevents entanglement and eliminates the need for frequent untangling, thereby improving walking productivity.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20260047556A1Lease for Dog

Publication Date: 2026.02.19 SCHWAN MARK ANDREW

AI summary

A leash for a dog includes a leash structure having a first end and a second end. The leash structure includes a first portion extending from the first end towards the second end and including an outer sleeve and a rigid rod arranged inside the outer sleeve. Moreover, the leash structure includes a second portion extending from the first portion to the second portion and defining a loop structure at the second end to facilitate a holding of the leash by a user. The second portion is a flexible portion.