Dual Unlock Padlock With Two-Hand Combination Reset
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Solution Overview
Problem
Existing padlocks with a single unlocking mechanism, such as combination or key-controlled mechanisms, are cumbersome and difficult to reset, often requiring only one hand and leading to inefficient operation.
Innovation Solution
A dual locking control mechanism padlock with both key-controlled and combination-controlled mechanisms, allowing both hands for resetting and enabling independent operation of each mechanism without interference, featuring a bolt-cam with a flexible-end neck and a combination reset function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single unlocking mechanism (combination or key) is used, then the padlock structure is simple, but the resetting operation becomes cumbersome and difficult requiring only one hand
Solution Approach 1:
The padlock is divided into two independent unlocking systems: a key-controlled mechanism and a combination-controlled mechanism. Each mechanism operates independently through separate control paths (key cylinder vs. dial clutches), allowing the resetting function to be optimized separately from the locking function. The reset button specifically engages only with the combination mechanism's clutches, enabling two-handed operation without affecting the key mechanism's simplicity.
Solution Approach 2:
The padlock body and bolt-cam structure serve multiple functions: they provide the common framework for both key and combination unlocking mechanisms, while the reset button adds a third function (combination resetting) that operates through the existing clutch mechanism. This multi-functionality allows the patent to improve resetting ease without adding separate dedicated components for each function.
2Adaptability or versatility
If dual locking control mechanisms are added, then the usability and security are enhanced, but the device complexity increases
Solution Approach 1:
The dual locking control mechanisms are segmented into independent operational paths: the key-controlled mechanism uses a key cylinder that directly actuates the bolt-cam, while the combination-controlled mechanism uses dials that engage clutch elements on the bolt-cam. This segmentation allows each mechanism to be optimized independently, with the combination mechanism's clutches specifically designed to enable two-handed resetting operations without complicating the key mechanism.
Solution Approach 2:
The bolt-cam incorporates dynamic elements including clutch mechanisms that can be selectively engaged or disengaged. The reset button dynamically alters the clutch engagement state, allowing the dials to be freely rotated during resetting operations. This dynamic behavior enables the system to adapt between locking and resetting modes without requiring separate mechanical structures for each function.
3Ease of operation
If the reset button allows one-hand operation, then the operation is simplified, but the resetting process becomes difficult and inefficient
Solution Approach 1:
Instead of requiring the user to manipulate dials with one hand while pressing the reset button with the same hand, the patent inverts the operational logic: the reset button is positioned and sized to be pressed with one hand (thumb), while the dials are positioned to be manipulated with the other hand (fingers). This inversion of hand usage allows both actions to occur simultaneously and comfortably, greatly improving resetting efficiency.
Solution Approach 2:
The reset button acts as an intermediary mechanism that mediates between the user's input and the clutch engagement. When pressed, it triggers the clutch disengagement allowing free dial rotation. This intermediary function separates the resetting action (pressing button) from the dial manipulation action, enabling them to be performed by different hands simultaneously without mechanical interference.
4Device complexity
If the key and combination mechanisms share the same control path, then the structure is simplified, but mechanical interference occurs between locking modes
Solution Approach 1:
The control paths for key and combination mechanisms are segmented into separate operational channels. The key cylinder connects directly to the bolt-cam through a dedicated linkage, while the combination dials connect to the bolt-cam through separate clutch elements. This segmentation prevents mechanical interference because each mechanism can actuate the bolt-cam independently without requiring the other mechanism's components to be in specific positions or states.
Solution Approach 2:
The clutch elements on the bolt-cam serve as intermediaries between the combination dials and the bolt-cam's locking action. These clutches can be selectively engaged or disengaged, allowing the combination mechanism to operate independently of the key mechanism. When the reset button is pressed, it disengages the clutches, allowing the dials to rotate freely without affecting the key-controlled locking state, and vice versa.
Data Source
AI summary
The present invention is directed to a padlock having dual locking control mechanisms, where one locking control mechanism is a key controlled mechanism and the other locking control mechanism is a combination controlled mechanism. The key controlled mechanism is configured to allow for unlocking and locking of the padlock through the use of a correct cut key, and the combination controlled mechanism is configured to allow for unlocking and locking of the padlock through the use of a correct lock open code entered into the combination controlled mechanism. The padlock may contain a combination reset function which enhances the user experience by allowing the user to have both hands available to turn the dials when resetting and/or reconfiguring the correct lock open code of the combination controlled mechanism