Trailer Lock Coupler for Selective Alarm Control and Theft Resistance
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Solution Overview
Problem
Existing trailer locks with alarm devices are inconvenient to manually open or close and can be easily dismantled by thieves using tools, rendering the alarm function ineffective.
Innovation Solution
A trailer lock design featuring a rotatable coupler that controls the alarm module's on/off state, an accommodating cavity with a switch mechanism, and a lock body with a lock cylinder for secure locking and unlocking, along with a coupler that can be connected to traction equipment to shield connectors, enhancing security and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the alarm device is made easily accessible for manual operation, then ease of operation is improved, but security against theft is worsened
Solution Approach 1:
The alarm device control is segmented into two distinct operational modes: a first position for manual switching (improving ease of operation) and a second position for automatic triggering only (improving security). This segmentation allows the system to provide both user-friendly manual control and theft prevention through the automatic-only mode.
Solution Approach 2:
The alarm device dynamically changes its operational characteristics based on the switch position. In the first position, it allows both manual and automatic operation. In the second position, it restricts operation to automatic triggering only, preventing manual deactivation by thieves. This dynamic behavior resolves the contradiction between ease of operation and security.
2Ease of operation
If the alarm device is made easily accessible for manual switching, then ease of operation is improved, but vulnerability to dismantling is worsened
Solution Approach 1:
The switch mechanism is segmented into two positional states with distinct functional characteristics. The first position provides manual switching capability for legitimate users, while the second position eliminates manual switching capability entirely, allowing only automatic alarm triggering. This segmentation ensures that even if thieves access the manual switch, they cannot deactivate the alarm in the second position.
Solution Approach 2:
The switch mechanism acts as an intermediary between the user and the alarm device. It mediates between the need for manual control (ease of operation) and the need to prevent unauthorized deactivation (security). By introducing this intermediary with two distinct modes, the system allows legitimate manual operation while blocking theft through the automatic-only mode.
3Ease of operation
If the connector is exposed for easy connection, then ease of operation is improved, but security against theft is worsened
Solution Approach 1:
The connector is preliminarily positioned and designed to be automatically covered by the coupler body upon connection. This preliminary arrangement ensures that once the coupler is connected, the connector becomes inaccessible, preventing thieves from using tools to dismantle the alarm device. The ease of connection is maintained through the initial open position, but security is established through the automatic covering action.
Data Source
AI summary
The present disclosure provides a trailer lock, which comprises a lock body and a U-shaped lock rod, wherein a lock rod hole penetrating vertically is formed on both sides of the lock body for insertion and fitting of the U-shaped lock rod; a lock cylinder is provided on the lock body for controlling the locking and unlocking of the U-shaped lock rod; an alarm module is installed in the lock body, a rotatable coupler is further disposed outside the lock body, and the coupler has a first position and a second position; the alarm module is turned on when it is in a first position, and turned off when it is turned to a second position.