Cylinder Lock Shutter Plate Mechanism for Single-Step Key Operation
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Solution Overview
Problem
The existing protective device for cylinder locks requires complex operations to move the shutter plate from a closed to an open position, involving fitting and pivoting a magnet key, which is cumbersome and inefficient.
Innovation Solution
A protective device with an urging member to push the shutter plate to the open position, a restricting member that can be released by a slide member and spring mechanism, allowing the shutter plate to move to the open position with a single directional push of the magnet key, and a movable engagement member that absorbs excessive force when an unauthorized key is used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shutter plate is moved by pivoting the magnet key after unlocking, then the magnet lock can be unlocked, but the operation becomes complicated requiring multiple steps
Solution Approach 1:
The patent combines the shutter plate movement function with the magnet key insertion operation. The shutter plate is moved to the open position by the linear movement of the magnet key alone, merging the unlocking and shutter opening operations into a single action. This eliminates the need for separate pivoting operations while maintaining reliable unlocking functionality.
Solution Approach 2:
The magnet key is designed to perform multiple functions: it unlocks the magnet lock and simultaneously moves the shutter plate to the open position through its linear insertion movement. This multi-functionality reduces operational steps while maintaining security reliability.
2Ease of operation
If the urging member constantly urges the shutter plate to the open position, then the shutter plate can move smoothly, but the shutter plate cannot be restricted to the closed position
Solution Approach 1:
The urging force is applied locally and conditionally rather than continuously. The urging member only exerts force to move the shutter plate when the magnet key is inserted and the magnet lock is unlocked. When the magnet key is removed, the restricting member engages to hold the shutter plate in the closed position, providing local quality control over the urging action.
Solution Approach 2:
The system dynamically adjusts the state of the shutter plate based on the magnet key insertion status. When unlocked, the urging member activates to move the shutter plate; when locked, the restricting member engages to maintain the closed position. This dynamic switching between states ensures both smooth operation when needed and reliable restriction when required.
3Ease of operation
If the magnet key can be freely inserted and removed, then the operation is simple, but excessive force can damage the magnet lock
Solution Approach 1:
The spring member is pre-loaded to provide cushioning force that absorbs excessive insertion force applied to the magnet key. This beforehand cushioning prevents damage to the magnet lock while still allowing smooth operation during normal use. The spring compresses under excessive force, preventing direct transmission of damaging forces to the magnet lock mechanism.
Solution Approach 2:
The spring member acts as an intermediary between the magnet key and the magnet lock mechanism. It mediates the force transmission, allowing normal operational forces to pass through while absorbing and isolating excessive forces that could cause damage. This intermediary element protects the magnet lock while maintaining ease of operation.
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
Enables smooth operation of the shutter plate to the open position with a single directional push of the magnet key and prevents excessive force on the magnet lock, ensuring secure and efficient operation.
Implementation Method 1
a spring member provided between the slide member and the movable engagement member so as to exert a resilient force for pushing the movable engagement member
Implementation Method 2
a magnet lock disposed in the casing while having a movable member capable of operating accompanying unlocking by a magnet key
Data Source
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AI summary
A protective device for a cylinder lock is provided in which a shutter plate supported on a casing so as to be capable of opening and closing a mechanical key insertion hole is capable of moving to an open position when a magnet lock is unlocked by a magnet key, wherein a restricting member (50) is disposed in the casing so as to be capable of moving between a restriction position in which the shutter plate (26) urged to an open position side is restricted to the closed position and a restriction release position, a slide member (64) that is slidably housed in the casing not only enables an insertion operation of the magnet key to an unlocked position but can also be moved from the unlocked position to a pushed-in position, and restriction release means (67) is provided between the slide member (64) and the restricting member (50) and moves the restricting member (50) to the restriction release position in response to the slide member (64) being pushed in to the pushed-in position in a state in which the magnet lock (25) is unlocked. This enables a shutter plate to be moved from a closed position to an open position by operation of a magnet key in one direction.