Two-Arm Lever Trigger for Lock Assembly Simplification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing locks face issues with complex assembly, inaccuracies over time, high production costs, and incompatibility with multi-point locking systems, as well as the inability to be switched between automatic and manual operation, especially when combined with electric door openers.
Innovation Solution
A two-armed pivoting lever trigger with a feeler arm and blocking element for the connecting rod slide, where the feeler arm's vertical extent is approximately 50% of the case height, allowing for reliable interaction with the latch and enabling adjustable pressure, and a plug-in wheel for fixing the latch in a retracted position, allowing for secure and flexible operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex trigger mechanism with multiple components is used to achieve reliable locking, then the locking reliability is improved, but the assembly complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the trigger mechanism components into a more integrated structure where the connecting rod slide, latch, and trigger elements work together as a unified system. The trigger is integrated with the connecting rod slide such that the latch is directly coupled to the trigger mechanism, eliminating the need for separate complex triggering components while maintaining reliable locking function.
Solution Approach 2:
The connecting rod slide serves multiple functions: it acts as both the trigger mechanism component and the connecting element between the latch and bolt. The latch itself performs both the locking function and the triggering function when moved, reducing the need for dedicated separate components and simplifying the overall mechanism.
2Manufacturing precision
If a delicate trigger mechanism design is used to achieve precise control, then the control precision is improved, but the accuracy and reliability over time deteriorate due to inaccuracies and malfunctions
Solution Approach 1:
The trigger mechanism is divided into distinct functional segments: the connecting rod slide, the latch, and the bolt, each with clearly defined movement paths and engagement points. This segmentation allows for easier manufacturing with standard tolerances while maintaining precise control, as each component can be manufactured and assembled independently with proper alignment features.
Solution Approach 2:
The patent incorporates features that compensate for wear and tolerance accumulation over time. The connecting rod slide includes clearance provisions and wear-compensating design elements that maintain functional accuracy even after extended use, preventing the delicate mechanism from becoming inaccurate due to normal wear and manufacturing variations.
3Reliability
If additional bolts are operated besides the latch to achieve secure locking, then the security level is improved, but the compatibility with electric door openers is lost
Solution Approach 1:
The lock system is designed with dynamic configurability where the bolt can be selectively engaged or disengaged. The connecting rod slide mechanism allows the bolt to be operated independently or in conjunction with the latch, enabling the system to adapt between different security modes and compatibility modes as 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 solution simplifies assembly, reduces production costs, enhances reliability, and allows for switching between automatic and manual operation, ensuring secure locking and compatibility with multi-point locking systems while enabling remote operation via electric door openers.
Implementation Method 1
a spring (16) which generates a restoring force
Implementation Method 2
the cam arm (28) is moved upwards against the action of cam springs (32)
Implementation Method 3
cam springs (32) which generate a restoring force
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to an automatic lock for doors or the like, having a latch (2) which is subject to the action of a latch spring, and an arresting element (12) for arresting a driving-rod slide (13) which is forced into its arresting position, wherein the driving-rod slide (13) controls at least one bolt (3) in the locked and unlocked position of the same, and wherein the driving-rod slide (13) is released, and the bolts (3) pass into the locked position, by virtue of a trigger (8) of the arresting element (12), said trigger projecting on the lock-case-front side and striking against the striking plate. In order to achieve a safe release with low production outlay, it is provided that the trigger (8) is a two-armed pivot lever, whose first arm (9) is formed by a sensing arm (10) and whose second arm (11) forms an arresting element (12) for the driving-rod slide (13) and is received in the slotted latch bolt (14).