Dual Locking Padlock with Key Override and Reset Mechanism
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Solution Overview
Problem
Current padlocks lack a dual locking mechanism that allows secure access by both combination code and key overriding, failing to meet new security regulations requiring easy inspection of luggage without compromising security.
Innovation Solution
A padlock design featuring a dual locking mechanism with a spindle and clutches, allowing operation via combination code or key overriding, where the shackle can be partially released or locked using a key, and a reset mechanism for changing the combination code.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a padlock uses a single combination locking mechanism, then it provides basic security, but it cannot facilitate easy inspection by security personnel without breaking the lock
Solution Approach 1:
The locking mechanism is segmented into two independent systems: a combination locking system (spindle with clutches and dials) and a key override system (separate key cylinder). This segmentation allows the lock to provide both security through the combination mechanism and ease of inspection through the key override, as security personnel can use the key to release the shackle without compromising the combination system.
Solution Approach 2:
The padlock is designed with multi-functionality to serve both regular users and security personnel. The combination mechanism serves regular users for secure locking, while the key override mechanism serves security personnel for inspection purposes. Both systems operate on the same shackle, making the device universal for different user groups and purposes.
2Ease of operation
If a padlock uses two separate and independent locking systems, then it allows easy opening by security personnel with a master key, but it increases device complexity
Solution Approach 1:
The two locking systems (combination and key override) are merged into a single integrated padlock structure. Both systems share common components such as the shackle, lock housing, and spring mechanism. The spindle serves as a central element that connects both the combination dials and the key cylinder, allowing them to work together in a unified mechanism rather than as completely separate systems.
Solution Approach 2:
The padlock components are designed to serve multiple functions. For example, the shackle is engaged by both the combination system (through the spindle and clutches) and the key system (through the cam and latch). The spring provides both locking force and reset functionality for both systems. This multi-functionality reduces the need for entirely separate mechanisms, thereby reducing overall complexity.
3Adaptability or versatility
If a padlock allows the shackle to be partially released, then it enables inspection while maintaining security, but it requires precise control mechanism
Solution Approach 1:
The shackle release mechanism is designed to be dynamic rather than static. When the key is inserted and turned, the cam rotates to different positions that dynamically control the latch position. This allows the shackle to be partially released (unlatched from the body) while remaining attached to the spindle, or fully released when needed. The spring continuously applies force to return components to their default positions, providing dynamic control throughout the operation.
Data Source
AI summary
A dual locking padlock having a code locking mechanism and an overriding mechanism is disclosed. The housing has a top body as its top portion, a stack of dials and a stack of clutches mounted on a middle portion and a bottom portion having holes to receive screws from the top body for securing the housing. Dials are engagingly mounted on the clutches and only rotatable relative to the clutch when the lock is in the opened mode for changing the combination code. The housing has a spindle having a channel to store the heel of a shackle. The spindle's upward movement allows the shackle to be pulled upward to unlock the padlock. The spindle is allowed to move upward either when a correct combination code is used or when a key activates the overriding mechanism. With the overriding mechanism, the padlock can also be opened with a key.