Expander Harness Elastic Displacement for Pet Tug Damping
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Solution Overview
Problem
Existing pet harnesses fail to effectively dampen micro-vibrations and tuggings when walking a pet on a leash, leading to discomfort and potential injury, as they lack coordinated elastic displacement between the leash connector and shoulder parts, and are prone to fatigue due to unoptimized elastic element lengths and spring stiffness.
Innovation Solution
The expander harness design features a back part with a lining, a leash connector, and shoulder part elements that are elastically displaced in opposite directions, with the leash connector and shoulder part connecting elements moving away from each other through elastic elements and limiting elements, optimized by determining the length and spring stiffness to absorb forces and prevent fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If elastic elements are used to dampen micro-vibrations and tuggings, then comfort for the pet and owner is improved, but the elastic elements are prone to fatigue due to cyclic loading
Solution Approach 1:
The patent introduces limiting elements that pre-establish a maximum stretching boundary for the elastic elements. This prevents the elastic elements from undergoing excessive cyclic deformation that would lead to fatigue, while still allowing sufficient elastic displacement to dampen micro-vibrations and tuggings during normal use.
Solution Approach 2:
The patent optimizes the spring stiffness and length parameters of the elastic elements to achieve the desired balance between comfort and durability. By carefully selecting these parameters, the elastic elements can effectively absorb vibrations while operating within safe stress limits that prevent fatigue failure.
2Reliability
If the stretching length of elastic elements is limited by stretching limiting elements, then fatigue is prevented, but the maximum force absorption capability is reduced
Solution Approach 1:
The patent employs multiple elastic elements with different spring stiffness values arranged in a coordinated system. When force is applied, the elements engage sequentially based on their stiffness characteristics, allowing the harness to absorb forces of varying magnitudes while keeping each individual element within its safe operating range to prevent fatigue.
3Object-affected harmful factors
If coordinated elastic displacement between leash connector and shoulder parts is implemented, then comfort is improved, but device complexity increases
Solution Approach 1:
The patent divides the elastic displacement function into separate segments: one elastic element connected to the leash connector and another elastic element connected to the shoulder parts. Each segment operates independently with its own limiting element, simplifying the overall design while achieving coordinated displacement through the natural mechanics of the harness structure.
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
This design minimizes tuggings and vibrations, ensuring comfort for both the pet and owner, while maintaining the leash connector's functionality under varying forces, and extends the harness's lifespan by coordinating elastic element lengths and spring stiffness to prevent overuse and fatigue.
Implementation Method 1
The elastic element of the expander harness shall be subjected to cyclic loading, and the amplitude of the load shall be greater than the elastic elongation section of the elastic element
Implementation Method 2
the spring action in the direction opposite to each other
Implementation Method 3
The stretching length of the elastic elements needs to be limited by stretching limiting elements
Implementation Method 4
the elastic element and the shoulder part elastic element dampen together the tugging and pulling forces acting when walking a pet on a leash
Data Source
AI summary
An expander harness for walking pets on a leash, comprising a back part (3) equipped with a lining (2). A limiting element (10) is threaded through the leash connector (16) on the back part (3), which is fixed to the lining (2) by a limiting element fixing point (12) crossing the intersection of the axis line (9) and a separating axis line (9a).The leash connector (16) on one side of the separating axis line (9a), and the at least one shoulder part connecting element (18) on the other side of the separating axis line (9a), are elastically displaced in the direction opposite to each other, moving away from each other to the extent of the stretching of the elastic element (11) threaded through the leash connector (16), extending between the leash connector (16) and the limiting element fixing point (12), and that of the shoulder part elastic element (21) threaded through the shoulder part connecting element (18).