Compression Spring Locking Mechanism for Door Security
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Solution Overview
Problem
Existing closures using torsion springs for locking mechanisms are prone to breakage under alternating bending loads and fail to provide sufficient locking force, leading to unreliable door security due to limited force transmission.
Innovation Solution
The closure employs compression springs arranged within sleeves to avoid alternating bending loads, allowing for greater force transmission and increased durability, with both springs designed as compression springs to enhance the locking mechanism's reliability and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If torsion springs are used in the locking mechanism, then the closure can be operated frequently, but the springs break due to alternating bending loads
Solution Approach 1:
The patent changes the fundamental parameter of spring operation from alternating bending loads (torsion springs) to axial compression/tension loads (compression springs). This parameter change allows the springs to withstand frequent cyclic operations without the fatigue failure that plagues torsion springs, thereby resolving the contradiction between productivity and reliability
Solution Approach 2:
Instead of using torsion springs that bend back and forth, the patent inverts the approach by using compression springs that are compressed and extended axially. This inversion of the loading mode eliminates the harmful alternating bending stresses while maintaining the spring's ability to provide the necessary locking and actuating forces
2Device complexity
If torsion springs are used to secure the door, then the locking mechanism can be compact, but only small forces can be transmitted
Solution Approach 1:
The patent changes the loading parameter from torsional moment to axial force, allowing compression springs to generate significantly higher forces for the same size compared to torsion springs. This enables the transmission of greater locking forces while maintaining a compact mechanism, resolving the contradiction between device complexity and force transmission capability
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 solution significantly extends the service life of the closure and enhances door security by enabling the transmission of greater forces, ensuring reliable locking without the risk of torsion spring failure.
Implementation Method 1
the first spring is designed as a compression spring and in a first sleeve is arranged... the second spring is designed as a compression spring and in a second sleeve is arranged
Data Source
Figure 1~10
Figure 11
Figure 12
AI summary
The closure (10) has a locking element (30) pivotably supported at a door frame around a rotational axis (33) for locking a door in a closed position of the closure. The locking element is held in the closed position against force of a spring by an actuating element (40). The actuating element is pivotably arranged against force of another spring for opening the closure such that the locking element is pivotable by the force of the former spring for releasing the door during pivoting the actuating element. The springs are formed as compression springs.