Lock Cylinder Mode Switching for Container Security
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Solution Overview
Problem
Existing locks for containers, such as dispensers, face challenges in allowing key-operated locking while also enabling manual opening without a key, often requiring additional components and complexity, and may not provide proper security when switched between modes.
Innovation Solution
A lock design featuring a rotatable lock cylinder that can switch between key-operated and push-button operated modes, using cooperating surfaces and springs to facilitate both secure key-operated locking and manual unlocking, reducing the need for additional components and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate snap-lock is provided to maintain the container closed when the key is not used, then the container can be properly locked, but the complexity of the container and the cost for materials and assembly increase
Solution Approach 1:
The patent combines the lock and snap-lock functions into a single integrated device. The lock mechanism includes a lockable element that can engage with a locking element to prevent opening, while also incorporating snap-lock functionality through the same structural components. This merging eliminates the need for separate snap-lock components, reducing material costs and assembly complexity while maintaining reliable locking capability.
Solution Approach 2:
The lock mechanism is designed to perform multiple functions: it can lock the container in a secured position, allow manual opening when unlocked, and provide snap-lock functionality to maintain the container closed. The lockable element and locking element are designed to work in multiple modes, serving both as a security lock and a closing mechanism, thereby reducing the need for additional specialized components.
2Ease of operation
If the lock is designed to allow manual opening without a key, then ease of operation is improved, but proper security locking capability deteriorates
Solution Approach 1:
The lock mechanism is designed with dynamic functionality, allowing it to switch between different operational modes. The lockable element can be positioned in different states: engaged with the locking element for secure locking, disengaged for manual opening, or in intermediate positions for snap-lock operation. This dynamic design enables the same mechanism to provide both strong security when locked and easy manual operation when unlocked, without compromising either function.
Solution Approach 2:
The locking and opening functions are differentiated by the local state of the lockable element relative to the locking element. When the lockable element is in the engaged position, strong security locking is provided. When disengaged, manual opening is enabled. The mechanism allows different operational qualities at different positions of the same component, providing both security and ease of operation as needed.
3Ease of operation
If a key holder is arranged internally to prevent the lock from assuming the locking position, then the key can be placed inside the container, but the container cannot be properly locked when key access is required
Solution Approach 1:
The patent extracts the key holder function from being a permanent internal structure that blocks locking. Instead, the key can be placed in a keyway or keyhole of the lock mechanism itself, or in a removable key holder that does not interfere with the locking action. The locking element is designed to engage with the lockable element regardless of key presence, allowing the key to be stored conveniently while maintaining full locking capability when needed.
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 lock provides a single, versatile solution for applications requiring key access and those allowing manual entry, with reduced component count and assembly complexity, enhancing reliability and cost-effectiveness.
Implementation Method 1
a spring which returns the lock cylinder into its initial position
Implementation Method 2
a resilient means, such as a return spring, may be provided between the housing and the lock cylinder
Data Source
AI summary
The invention relates to a lock comprising a housing (14, 55), a key operated lock cylinder (13, 51), which is arranged rotatable in the lock housing and a lock catch (11, 60), which is connected to the lock cylinder and rotatable between a locking position and a releasing position. The lock is arranged to be selectively set in a key operated mode, wherein the lock catch is rotatable with the lock cylinder, or in a push button operated mode, wherein the lock catch is movable by axial displacement of the lock cylinder.