Gearbox Radial Locking Element for Window Manipulation Prevention
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Solution Overview
Problem
Existing gear mechanisms for windows and doors lack effective and cost-efficient security measures to prevent unauthorized manipulation, as they rely on complex locking systems that increase costs.
Innovation Solution
A gear mechanism with a securing element that moves between a radial release and blocking position, interacting with a stop to prevent adjustment movements from the fitting element, thereby enhancing security by distinguishing the direction of adjustment movements and blocking undesired transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gear mechanism is used to couple the handle to the fitting arrangement, then adjustment movements can be transmitted effectively, but adjustment movements originating from the drive rod can also be transmitted back to the handle, enabling manipulation attempts
Solution Approach 1:
The patent applies the dynamics principle by implementing a securing element that can dynamically change its position between a release position (allowing adjustment movements from the nut element) and a blocking position (preventing reverse movements from the drive rod). This dynamic positioning mechanism enables the gear to adapt its functionality based on the direction of the adjustment movement, thereby resolving the contradiction between ease of operation and security against manipulation.
2Reliability
If additional locking mechanisms are provided to prevent manipulation, then security is improved, but the complexity and cost of the fitting arrangement increase
Solution Approach 1:
The patent applies the merging principle by integrating the security function directly into the existing gear mechanism through the securing element. Instead of adding separate locking mechanisms, the securing element is combined with the gear's adjustment movement transmission function, allowing the same component to serve dual purposes: transmitting legitimate adjustments while blocking manipulation attempts. This reduces device complexity and cost while maintaining improved security.
Solution Approach 2:
The patent applies the self-service principle by designing the securing element to automatically distinguish and respond to different directions of adjustment movements. The element self-activates to block reverse movements originating from the drive rod without requiring external locking mechanisms or additional control systems. This automatic self-regulating behavior enhances security while minimizing added complexity.
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3A~3B
AI summary
A gearbox for a hardware assembly of a window, door, or the like comprises a pivot element adjustable about an axis of rotation, designed for adjusting a hardware element, in particular a drive rod, of the hardware assembly, and a locking element movable relative to the axis of rotation between a radial release position and a radial locking position. The gearbox is configured such that the locking element is forced into the release position during an adjustment movement originating from the pivot element and is forced into the locking position during an adjustment movement originating from the hardware element. Furthermore, the gearbox includes a stop that is arranged within a movement path of the locking element corresponding to the locking position and outside a movement path of the locking element corresponding to the release position, in order to prevent adjustment of the hardware element when the locking position is present.