Pivoting Lever Lock with Spring-Loaded Latch for Security
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Solution Overview
Problem
Existing swivel lever locks with combination locks are vulnerable to unauthorized viewing of the number combination when the container is open for extended periods, and existing solutions increase design complexity.
Innovation Solution
Incorporating a spring element with run-in bevels on the lock latch that allows blurring of the combination lock numbers while maintaining easy operation and simple design, with the latch automatically returning to its locked position under spring influence, and a positioning spring to prevent accidental relocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an additional slider is used to cover the numbers on the combination lock, then the numbers are prevented from being read, but the design complexity increases
Solution Approach 1:
The lock latch automatically performs the obscuring function through its own movement and spring-loaded return mechanism, eliminating the need for separate obscuring components like sliders. The system uses its inherent mechanical operation to achieve both locking and number obscuration
Solution Approach 2:
The obscuring function is merged with the locking mechanism itself. The lock latch serves dual purposes: securing the handle lever and obscuring the combination numbers, thereby eliminating the need for separate obscuring components
2Reliability
If the handle lever is folded into the recess, then the lock is secure, but the combination numbers become visible to unauthorized persons
Solution Approach 1:
The lock latch dynamically changes position based on the handle lever state. When the handle is folded in, the latch moves to cover the numbers; when the handle is extended, the latch retracts, allowing numbers to be visible for input. This dynamic positioning resolves the contradiction between security and accessibility
3Object-affected harmful factors
If run-in bevels are added to the lock latch, then the numbers can be blurred while maintaining operation, but the manufacturing complexity increases
Solution Approach 1:
The run-in bevels use simple angular geometric features on the lock latch that are easily manufactured with standard machining processes. The beveled edges guide the latch movement and enable the obscuring function without requiring complex curved surfaces or specialized manufacturing
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 ensures the combination lock numbers remain obscured, simplifies the design, and prevents accidental relocking, enhancing security and usability without additional complexity.
Implementation Method 1
a spring element is provided which acts on a lock latch
Implementation Method 2
A positioning spring is preferably arranged between the trough and the gripping lever
Data Source
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AI summary
The invention relates to a pivot lever lock for lids, doors, or flaps of cabinets and containers, consisting of a recess (1) that can be placed on the door leaf, in which a handle lever (2) is arranged. The handle lever can be folded out of the recess (1) about an axis (3) parallel to the plane of the door and, in the unfolded state, pivoted about a second axis (4) perpendicular to the plane of the door. The handle lever (2) has two different locking systems: a freely programmable combination lock (5) with an actuating element (6) and a locking cylinder (7) that can be operated by a key. In its closed position, folded into the recess (1), the handle lever (2) can be locked or unlocked using the two locking systems. A spring element (12) is provided, which acts on a latch (8) that is provided with chamfers (11) corresponding to retaining edges (10) of the recess (1).