Retractable Pet Leash Locking for Sudden Pull Restraint
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Solution Overview
Problem
Existing pet traction devices lack effective control mechanisms to prevent pets from rushing out and causing accidents, leading to potential injuries.
Innovation Solution
A pet tractor with a housing, rope winding assembly, locking assembly, and blocking assembly, where the rope winding member rotates around a shaft, and a movable member limits the rope when the rotation speed exceeds a preset speed, engaging the blocking assembly to stop the rope from extending, thereby controlling the pet's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rope winding member rotates freely to extend the tractor rope, then the pet can move freely, but the pet may rush out and cause accidents
Solution Approach 1:
The patent employs dynamic control mechanisms including a locking assembly with movable blocking parts and a speed-sensitive blocking assembly that activates when rotation speed exceeds a preset threshold. These components dynamically adjust the rope extension based on operational conditions, allowing free movement under normal conditions while automatically restricting movement when dangerous speeds are detected, thus resolving the contradiction between movement freedom and safety.
2Object-affected harmful factors
If the rope winding member is locked to prevent over-extension, then pet safety is improved, but the device complexity increases
Solution Approach 1:
The patent implements self-service mechanisms where the blocking assembly automatically activates based on rotation speed without requiring external control systems. The movable blocking parts engage or disengage autonomously in response to the rotational state of the rope winding member, enabling safety control through passive mechanical response rather than active complex control systems, thus maintaining safety while minimizing added complexity.
3Ease of operation
If the movable member abuts against the blocking assembly to limit rope extension, then control ability is improved, but the mechanical stress on components increases
Solution Approach 1:
The patent incorporates cushioning elements and compliant mechanical designs in the blocking assembly and movable blocking parts. These elements absorb and distribute the mechanical stress generated when the movable member abuts against the blocking assembly, preventing concentrated loads that could damage components. The cushioning mechanism allows the control function to operate effectively while protecting the mechanical components from excessive stress.
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 effectively reduces the risk of pets rushing out by limiting the rope extension, enhancing control and restriction capabilities, ensuring safer pet handling.
Implementation Method 1
when the rotation speed of the rope winding member exceeds a preset rotation speed, a rotation centrifugal force of the rope winding member is too large, so that the movable member can limit the rope winding member by means of abutting against the blocking assembly
Data Source
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AI summary
The present invention provides a pet tractor and a traction device, which relate to the technical field of pet traction. The pet tractor includes a housing (110), a rope winding assembly (120), a locking assembly (130), and a blocking assembly (140), wherein the housing (110) defines a mounting cavity (111), and the mounting cavity (111) is provided therein with a first rotation shaft (112); a rope winding member (121) is rotationally connected to the first rotation shaft (112), and one end of a movable member (122) is movably connected to the rope winding member (121); the locking assembly (130) is connected to the housing (110), and the locking assembly (130) is movably connected to one end of the tractor rope; and the blocking assembly (140) can abut against or separate from one end of the movable member (122). The tractor rope wound on the rope winding member (121) can be extended in the present disclosure, and a length of the tractor rope can be defined through the locking assembly (130) locking the rope winding member (121). In case that the pet rushes out suddenly, when the rotation speed of the rope winding member exceeds a preset rotation speed, the rotation centrifugal force of the rope winding member is too large, so that the movable member can limit the rope winding member by means of abutting against the blocking assembly, which blocks and limits the rope winding member, so as to reduce the possibility that the pet rushes out and hurts people.