Self-Latching Coupler Lock Housing for Release Lever Security
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Solution Overview
Problem
Existing lock devices for self-latching trailer couplers are easily defeated by thieves, failing to provide adequate security for valuable trailers.
Innovation Solution
A coupler lock device featuring a housing with a top panel that restricts the upward movement of the ball clamp assembly, combined with a hinged closure member and padlock shackle, which secures the release lever in a closed position, preventing unauthorized removal or coupling of the hitch ball.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking pin or shaft is inserted through holes in the sides of the coupler to restrict movement of the retaining mechanism, then the coupler is locked in place, but the lock device is relatively easy for a thief to defeat
Solution Approach 1:
The lock device is divided into separate functional components: a housing that covers the release lever, a closure member that secures the housing, and a padlock integration point. This segmentation allows each component to perform its specific function while collectively providing robust security that cannot be easily defeated by simple manipulation techniques.
Solution Approach 2:
The housing acts as an intermediary barrier between the thief and the release lever mechanism. By enclosing the release lever and requiring padlock engagement through the closure member, the housing mediates the interaction and prevents direct access to the locking mechanism, thereby defeating simple defeat methods.
2Ease of operation
If the release lever is made movable between closed and open positions for operation, then the coupler can be locked and unlocked, but unauthorized uncoupling becomes possible without proper security measures
Solution Approach 1:
The housing and closure member are installed on the coupler before any uncoupling attempt occurs. This preliminary security measure prevents unauthorized action by blocking access to the release lever, requiring the thief to first defeat the padlock-secured housing before even attempting to move the release lever.
Solution Approach 2:
The legitimate user performs the action of closing and securing the housing with the closure member and padlock before leaving the coupler unattended. This preliminary securing action ensures that when the user returns, the security measure is already in place, preventing unauthorized uncoupling during the absence.
3Reliability
If a housing with closure member is added to secure the release lever, then unauthorized access is prevented, but the device complexity and installation steps increase
Solution Approach 1:
The housing and closure member are designed as integrated components that work together as a single security system. The housing provides the enclosure while the closure member provides the securing mechanism, and together they form a unified security package that is manufactured and installed as a coordinated assembly, reducing overall complexity compared to separate independent security devices.
Solution Approach 2:
The housing serves multiple functions: it encloses the release lever for security, provides a mounting structure for the closure member, and creates the padlock engagement interface. This multi-functionality reduces the need for additional separate components, thereby reducing manufacturing and installation complexity while maintaining high security effectiveness.
Data Source
AI summary
A coupler lock device is configured for use with a self-latching trailer coupler securing a hitch ball in the coupler socket. The coupler lock device has a housing that includes a top panel portion defining a cavity configured so that, when the housing is secured in position over the trailer coupler, the housing top panel prevents seating of the hitch ball in the coupler socket by restricting upward movement of the release lever when an attempt is made to insert the hitch ball into the coupler socket. Also, when the housing is secured in position over the trailer coupler with a hitch ball seated in the coupler socket, the housing top panel prevents removal of the coupler socket from the hitch ball by restricting upward movement of the release lever that would otherwise release the coupler socket from the hitch ball.