Cable Wrap Tension Reducer for Security Device
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Solution Overview
Problem
Existing cable wrap security devices for protecting boxes and packages are prone to malfunction when subjected to abrupt forces, leading to breakage of the ratchet mechanism and unwinding of cables, exposing the protected contents to unauthorized access or removal.
Innovation Solution
The implementation of a tension reducing device, such as an annular collar or ring, that causes an abrupt change in direction of the cables as they exit the housing, creating a large frictional force and reducing the force transmitted to the ratchet mechanism, thereby preventing breakage and unwinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable wrap security device uses a ratchet mechanism to tighten cable loops around an object, then the security device can maintain cable tension and prevent unauthorized removal, but the ratchet mechanism is vulnerable to breakage when subjected to abrupt forces
Solution Approach 1:
The patent introduces a tensioning device with a spring mechanism that is pre-configured to absorb abrupt forces before they reach the ratchet mechanism. The spring acts as a cushioning element that compresses under sudden loads, preventing force transmission to the vulnerable ratchet teeth and pawl, thereby protecting the locking mechanism from breakage while maintaining security function
Solution Approach 2:
The patent inserts a tensioning device with a spring as an intermediary element between the cable loop and the ratchet mechanism. This intermediary component absorbs and dissipates abrupt forces through spring compression, preventing direct force transmission to the ratchet mechanism and eliminating the harmful impact while preserving the security function
2Reliability
If the cable loops are tightened sufficiently to prevent removal from the object, then security is enhanced, but the tension transmitted to the spool and ratchet mechanism increases the risk of malfunction
Solution Approach 1:
The spring-based tensioning device is designed to maintain adequate cable tension for security while simultaneously cushioning against force spikes that could damage the ratchet mechanism. The spring constant is selected to provide sufficient tension under normal conditions but compress under excessive load, protecting the ratchet from malfunction
Solution Approach 2:
The patent changes the mechanical parameter of force transmission by introducing a compliant spring element that alters the force-displacement relationship. The spring allows gradual tension buildup while absorbing sudden force changes, thereby maintaining cable tension for security purposes while preventing force transmission that could exceed the ratchet mechanism's strength limits
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 tension reducing device effectively absorbs abrupt forces applied to the cables, preventing damage to the ratchet mechanism and ensuring the cables remain securely wrapped around the object, thus enhancing the security of the protected contents.
Implementation Method 1
creating a large frictional force and reducing the force transmitted to the ratchet mechanism
Data Source
AI summary
A security device includes a housing containing a ratchet mechanism and a rotatable spool for storing a plurality of cable loops which extend outwardly from a plurality of openings formed in the housing and wrapped around the sides of a box-like object. A collar is mounted on the bottom of the housing and has openings adjacent each of the housing opening requiring the cable loops to abruptly change direction after exiting the housing and passing either beneath or above the collar before extending along the secured object. This abrupt change of direction reduces the amount of force which are exerted on the cable loops from being transmitted onto the ratchet mechanism. In alternate embodiments, adjacent cable loops pass through one or a pair of rings which cause a change of direction in the cable loops to reduce the transmission of forces onto the ratchet mechanism.