Cylinder Lock Shutter Plate Perpendicular Motion
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Solution Overview
Problem
Existing cylinder lock protection systems require a long mechanical key due to the shutter plate's movement along the axis of the key hole, compromising compactness.
Innovation Solution
A cylinder lock protection system with a shutter plate that moves perpendicular to the key hole axis, utilizing resilient means and engagement members controlled by cam mechanisms to automatically return to the closed position upon key withdrawal, allowing for a compact design without the need for a long key.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shutter plate moves along the axis of the key hole, then the shutter plate can be retained at the open position, but the size of the casing increases and a long mechanical key is required
Solution Approach 1:
The shutter plate is designed to move perpendicular to the axis of the key hole instead of along the axis, changing the dimension of movement from axial to radial. This allows the shutter plate to effectively block the key hole while maintaining a compact casing size and enabling the use of a shorter mechanical key.
2Reliability
If the shutter plate moves along the axis of the key hole, then the shutter plate can be retained at the open position, but the mechanical key length increases
Solution Approach 1:
By changing the shutter plate movement direction to be perpendicular to the key hole axis, the mechanical key only needs to extend far enough to engage with the cam mechanism within the compact casing, rather than needing to span the entire axial distance required for shutter plate retention.
3Ease of operation
If resilient means and engagement members are added to automatically return the shutter plate, then operability is enhanced, but device complexity increases
Solution Approach 1:
The resilient means (spring) automatically returns the shutter plate to the closed position when the mechanical key is removed, without requiring user intervention. The engagement members work with the cam mechanism to automatically disengage and allow spring-driven return, making the system self-service and enhancing 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
Enhances operability by ensuring the shutter plate is not forgotten in the open position and allows for a shorter mechanical key, maintaining compactness and theft resistance.
Implementation Method 1
resilient means provided between the casing and the shutter plate so as to urge the shutter plate toward the closed position side
Implementation Method 2
a magnet lock that is capable of retaining the shutter plate at the closed position when locked
Data Source
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AI summary
In a cylinder lock protection system in which a shutter plate automatically returns from an open position to a closed position in response to a mechanical key being withdrawn from a key hole, resilient means (57), first and second engagement members (58, 59), and cam means (60) for moving the engagement members (58, 59) are housed within a casing (22) so that they move along a plane perpendicular to the axis of a key hole (28), and the cam means (60) makes the first engagement member (58) engage with a shutter plate (34) in response to movement of the shutter plate (34) to the open position, makes the second engagement member (59) engage with the shutter plate (34) in response to the mechanical key (33) being inserted, releases the engagement of the first engagement member (58) with the shutter plate (34) in response to pivoting to an ON position, and releases the engagement of the second engagement member (59) with the shutter plate (34) in response to the mechanical key (33) being withdrawn. This enables the cylinder lock protection system to be formed compactly without the necessity for forming a long mechanical key.