Pet Traction Lock Catch With Multi-Arm Anti-Unhooking Structure
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Solution Overview
Problem
Existing lock catches for pet traction face issues with reduced elasticity over time, leading to easy unhooking due to insufficient resetting tension, or excessive force required for use, making them inconvenient and unreliable.
Innovation Solution
A lock catch design featuring a traction hook with an even number of swinging resetting mechanisms and torsion springs, where the swinging arms are positioned at a lower stopping point to form a closed ring, allowing for flexible and convenient operation, and multiple protections to prevent unhooking even with reduced spring elasticity, using cylindrical pins and a U-shaped hook body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a strong resetting tension spring is used, then the reliability of preventing unhooking is improved, but the ease of operation deteriorates because it is not convenient for the user to open the hook opening
Solution Approach 1:
The lock catch is divided into multiple independent swinging arms (first swinging arm, second swinging arm, etc.), each with its own resetting spring. This segmentation allows the system to distribute the locking force across multiple elements, maintaining reliability while reducing the individual force required from the user to operate each component.
Solution Approach 2:
The swinging arms are designed with predetermined lower stopping points and abutting positions that automatically engage when the arms swing downward. This preliminary positioning ensures that the locking action occurs automatically through the mechanism's own motion, reducing the force the user must apply while maintaining secure engagement.
2Ease of operation
If a weak resetting tension spring is used, then the ease of operation is improved, but the reliability deteriorates because the hook opening is easy to be opened causing unhooking
Solution Approach 1:
Multiple swinging arms with individual resetting springs are combined to work together as a unified locking system. The cumulative effect of multiple weaker springs provides the same total resetting force as a single strong spring, maintaining reliability while improving ease of operation for each individual component.
Solution Approach 2:
The abutting positions of the swinging arms are designed to create automatic mechanical engagement before any potential unhooking can occur. This preliminary engagement acts as a cushioning mechanism that prevents accidental opening while requiring minimal force from the user during normal operation.
3Duration of action of stationary object
If the elasticity of the resetting tension spring is reduced after long-term use, then the durability is improved, but the reliability deteriorates because the resetting pulling force is too small allowing easy unhooking
Solution Approach 1:
The locking function is distributed across multiple swinging arms and resetting springs. If one spring loses elasticity over time, the other springs continue to provide sufficient resetting force to maintain reliable operation, effectively providing redundancy against spring degradation.
Solution Approach 2:
The swinging arms are designed with fixed lower stopping points and abutting positions that ensure automatic engagement regardless of spring strength variations. This preliminary mechanical positioning ensures that even with reduced spring elasticity, the arms will still engage reliably at their predetermined positions.
4Reliability
If multiple swinging resetting mechanisms are used, then the reliability of preventing unhooking is improved, but the device complexity increases
Solution Approach 1:
Multiple swinging arm mechanisms are merged into a single integrated lock body structure, sharing common mounting points and operational space. This merging approach provides the reliability benefits of multiple mechanisms while minimizing the increase in overall device complexity through compact integration.
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 ensures the lock catch remains securely buckled on the pet collar collar, maintaining functionality even with aged springs, offering flexible operation and preventing unhooking, with two methods for buckling and a compact, light structure.
Implementation Method 1
a resetting tension spring arranged between the movable swinging arm and the hook-shaped buckle body, so that the movable swinging arm (the upper end) can quickly reset
Implementation Method 2
each swinging resetting mechanism comprises a swinging arm and a torsion spring; the middle part of the swinging arm penetrates through the through hole and is rotatably connected with the cylindrical pin; the torsion spring is fixedly sleeved on the cylindrical pin
Data Source
AI summary
The present invention discloses a lock catch for pet traction, which comprises a traction hook and a pull ring connected with one end of the traction hook. The traction hook comprises a hook body, an even number of swinging resetting mechanisms and cylindrical pins. The hook body comprises a first connecting part and two installing parts; every two swinging resetting mechanisms form a group and are symmetrically penetrated in corresponding through holes; each swinging resetting mechanism comprises a swinging arm and a torsion spring; one end of each group of swinging arms positioned on the outer side of the installing part is positioned at a lower stopping point, and the other end can be mutually abutted against each other; and open ends limited by the two installing parts and the first connecting part are closed. The present invention has novel appearance, flexible and convenient use and difficult unhooking.