Trailer Jack Lock Preventing Unauthorized Crank Access
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Solution Overview
Problem
Trailer jacks lack security measures, making them vulnerable to unauthorized use, theft, and vandalism, as they do not have any access denial or security features.
Innovation Solution
A jack lock and cover system that engages with manual or electronic trailer jacks, preventing access and use by unauthorized users through an over-under engagement mechanism with a lock bar and integrated locking mechanism, which can be configured for various jack types, including top-mount, side-mount, and electrically operated jacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no security measures are installed on trailer jacks, then the jack remains accessible and operable, but unauthorized persons can use the jack to steal trailers or cause vandalism
Solution Approach 1:
The lock and cover assembly nests around the trailer jack crank mechanism. The cover forms an outer shell that encloses the crank, while the lock bar inserts through the cover to engage with the crank shaft, creating a nested security structure that prevents unauthorized operation without significantly increasing overall device footprint
Solution Approach 2:
The lock bar serves as an intermediary element between the user and the crank mechanism. It physically blocks access to the crank shaft and requires a key or combination to disengage, acting as a mediator that controls access to the jack operation while maintaining the original jack structure
2Reliability
If a lock and cover system is added to the trailer jack, then unauthorized access is prevented, but the device complexity increases
Solution Approach 1:
The security function is extracted as a separate lock and cover assembly that can be independently applied to the trailer jack. This modular approach allows the security features to be added without modifying the original jack mechanism, maintaining ease of operation for authorized users while providing robust security against unauthorized access
3Reliability
If the jack lock engages with the crank to prevent rotation, then unauthorized use is denied, but the crank cannot be manipulated by authorized users either
Solution Approach 1:
The lock bar is designed to be engaged or disengaged before crank operation. Authorized users can easily disengage the lock bar by inserting the key or combination, allowing normal crank operation. The preliminary action of disengaging the lock provides both security during storage and full operational access when needed, without creating ongoing operational restrictions
Data Source
AI summary
A trailer jack lock for securing both manually operated and electrically operated trailer jacks. The trailer jack lock uses an over-under engagement of the trailer jack lock with the components of a trailer jack to prevent manipulation of hand cranks or electric controls, stopping unauthorized users from using the trailer jack to remove a trailer from a vehicle or mounting it to another vehicle. The trailer jack lock may then prevent the theft or misuse of a trailer while left unattended, such as when a user is traveling or storing the trailer for future use in an unsecure environment. The trailer jack lock may be adapted for any type of trailer jack, and includes a body and locking bar that may be used with widely available locking mechanisms, such as padlocks. The trailer jack lock may also protect a trailer jack from sun, rain, snow, and other elements.