Dual-Unlocking Padlock With Key and Recode Indicators
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Solution Overview
Problem
Existing padlocks lack visual indicators to determine when the shackle is in an open, closed, or reset mode, and do not provide a clear indication of whether the lock has been opened via a key mechanism or combination mechanism.
Innovation Solution
A padlock with a key mechanism indicator that visually signals opening via the key mechanism and a recode/reset indicator for the combination mechanism, allowing only one indicator to be extended at a time, with a shackle protrusion for resetting and a dual unlocking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If visual indicators are added to show lock status and mode, then user awareness of lock state is improved, but device complexity increases
Solution Approach 1:
The indicator system is self-actuating through spring-loaded mechanisms that automatically extend or retract based on the operational state of the padlock. The key mechanism indicator extends when the key cylinder is rotated, and the recode indicator extends when the combination mechanism is in recode mode, eliminating the need for external control systems or additional power sources.
Solution Approach 2:
The indicator mechanisms are designed as separate, extractable components that can be independently added to the padlock body. The key mechanism indicator and recode indicator are distinct elements that can be removed or adjusted without affecting the core locking mechanism, allowing for modular implementation.
2Loss of information
If both key mechanism indicator and recode indicator are provided, then comprehensive status information is improved, but device complexity increases
Solution Approach 1:
The indicator system is divided into two distinct, functionally separate indicators: the key mechanism indicator that responds to key cylinder rotation, and the recode indicator that responds to combination mechanism state. Each indicator has its own actuating mechanism and provides specific information about its corresponding subsystem, allowing for independent operation and maintenance.
3Adaptability or versatility
If combination mechanism allows code resetting, then adaptability is improved, but ease of operation worsens due to hand requirement
Solution Approach 1:
The recode indicator extends in advance to alert the user that the combination mechanism is in recode mode, allowing the user to prepare for code changes. The protrusion on the shackle is positioned to automatically engage with the recode indicator mechanism, eliminating the need for manual activation while the lock is unlocked.
4Ease of operation
If protrusion on shackle is used for resetting indicator, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The protrusion on the shackle serves multiple functions: it acts as a lever for manually opening the lock when pulled, and simultaneously serves as the actuating mechanism for resetting the key mechanism indicator and activating the recode indicator. This multi-functional element reduces the need for separate control mechanisms while maintaining ease of operation.
Data Source
AI summary
The present invention is directed to a padlock including a body configured to house a combination mechanism and a key mechanism, the combination mechanism configured to allow operation of the padlock from a locked mode to an unlocked mode, and the key mechanism configured to allow operation of the padlock from the locked mode to an unlocked mode, a shackle having a short-leg and a long-leg, a key mechanism indicator configured to at least partially extend out of the body of the padlock when the padlock is operated to the unlocked mode by the key mechanism, and a latch configured for operative engagement with the key mechanism indicator to retain the key mechanism indicator at least partially extended out of the body of the padlock until the padlock has been operated from the locked mode to the unlocked mode by the combination mechanism.