Retractable Pet Leash With Secondary Lock for Forceful Movements
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Solution Overview
Problem
Conventional retractable pet leashes fail to adequately secure strong and active pets, posing safety risks due to insufficient locking mechanisms, especially when subjected to powerful forces, leading to potential accidents or injuries.
Innovation Solution
A retractable pet leash with a secondary safety locking mechanism that can be manually activated independently of the primary locking mechanism, providing an additional layer of security by preventing lead extension or retraction when actuated, enhancing control and safety during walks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional retractable pet leash with a single locking mechanism is used, then the device is simple and easy to operate, but it fails to securely contain powerful pets subjected to sudden bursts of force
Solution Approach 1:
The locking mechanism is divided into two independent segments: a primary locking mechanism and a secondary safety locking mechanism. The primary mechanism handles normal walking conditions, while the secondary mechanism provides backup protection against sudden force bursts. This segmentation allows each mechanism to be simpler and more specialized, improving overall reliability without requiring a single complex system.
Solution Approach 2:
The secondary safety locking mechanism serves as a pre-prepared backup that activates automatically when the primary mechanism fails or is overwhelmed by sudden force. This beforehand cushioning ensures that if the primary locking mechanism cannot contain a powerful pet's sudden movement, the secondary mechanism is already in place to prevent the lead from detaching, thereby cushioning against potential harm.
2Reliability
If a stronger locking mechanism is used to contain powerful pets, then safety against forceful movements improves, but the ease of operation and automatic braking functionality deteriorates
Solution Approach 1:
The locking system is segmented into a primary mechanism optimized for ease of operation with automatic braking, and a secondary mechanism optimized for strength and reliability. The primary mechanism uses softer, more compliant materials and lighter springs for smooth operation, while the secondary mechanism uses harder materials and stronger springs for maximum locking strength. This segmentation allows each mechanism to be optimized for its specific function without compromising the other.
Solution Approach 2:
Different parts of the locking system have different local qualities: the primary locking mechanism uses softer materials and lighter construction for ease of operation and automatic braking, while the secondary safety locking mechanism uses harder materials and stronger construction for reliability against forceful movements. This local quality differentiation allows the system to simultaneously achieve both ease of operation and safety against powerful pets.
3Reliability
If the locking mechanism is made more robust to handle powerful dogs, then safety improves, but the automatic braking response time and sensitivity deteriorates
Solution Approach 1:
The automatic braking function is segmented into two independent systems: the primary automatic braking mechanism responds quickly to normal lunge attempts, while the secondary locking mechanism provides robust protection against powerful forceful movements. The primary mechanism uses lighter, faster-response components for quick reaction, while the secondary mechanism uses heavier, more robust components for withstanding powerful dogs. This segmentation allows each system to be optimized for its specific response requirements without compromising the other.
Solution Approach 2:
The secondary locking mechanism serves as a pre-prepared backup that activates automatically when the primary mechanism fails or is overwhelmed by sudden force. This beforehand cushioning ensures that if the primary automatic braking mechanism cannot stop a powerful dog's sudden movement, the secondary mechanism is already in place to prevent the lead from detaching, thereby cushioning against potential harm.
Data Source
AI summary
A pet leash has a housing with an interior space, the housing having a graspable member adapted to be grasped by a handler. A lead extends from a pet connecting member to a housing end, the housing end of the lead being received within the interior space of the housing. A lead retraction mechanism is associated with the housing and adapted to allow the lead to be retracted into the housing or extended from the housing, and a retraction control mechanism is adapted to control the lead retraction mechanism to allow a handler to selectively control the retraction into and extension from the housing of the lead to selectively adjust the length of the lead extending from the housing. A safety locking mechanism is adapted to be in an unactuated position and in an actuated position where the safety locking mechanism prevents extension of the lead from the housing.