Anti-pull-out Device for Locking Mechanisms
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Solution Overview
Problem
Existing locking devices with anti-pull-out mechanisms are space-consuming and difficult to install, particularly due to the complex design of spring devices and ball arrangements that hinder efficient key withdrawal.
Innovation Solution
A compact anti-pull-out device with an annular bent region that changes gap width to prevent key withdrawal, utilizing an elastic effect and spring device to ensure easy installation and operation, where the anti-pull-out device remains stationary on the stator while the key rotates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional anti-pull-out device with multiple balls and spring mechanisms is used, then key withdrawal prevention is achieved, but the device becomes space-consuming and difficult to install
Solution Approach 1:
The anti-pull-out device is segmented into three functional components: an annular bent region for key engagement, an elastic element for providing restoring force, and a stop element for positioning. This segmentation allows each component to perform its specific function efficiently while reducing overall device complexity and space requirements compared to traditional multi-ball mechanisms.
Solution Approach 2:
Instead of using multiple discrete balls that move independently to engage key recesses, the invention inverts the approach by using a continuous annular bent region that engages the key peripherally. This inverted design simplifies the structure while maintaining the anti-pull-out function, as the annular region provides continuous engagement rather than discrete point contact.
2Ease of manufacture
If a compact anti-pull-out device is used, then installation is simplified and space is saved, but key withdrawal prevention effectiveness must be maintained
Solution Approach 1:
The elastic element automatically provides the restoring force needed to move the annular bent region between engaged and disengaged positions. This self-service mechanism eliminates the need for complex spring assemblies or additional actuating mechanisms, simplifying installation while ensuring reliable key withdrawal prevention through the natural elastic properties of the material.
Solution Approach 2:
The device utilizes changes in the elastic element's physical state (bent vs. straight) to control the engagement and disengagement of the annular bent region. By changing the curvature parameter of the elastic element, the device transitions between functional states, providing reliable key withdrawal prevention through simple geometric transformations rather than complex mechanical movements.
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 provides a simple, space-saving, and easy-to-install anti-pull-out mechanism that effectively prevents key withdrawal in locking positions while allowing easy insertion and withdrawal in start positions, enhancing the operational efficiency and design of locking devices.
Implementation Method 1
The anti-pull-out device is designed to be elastic, wherein the elastic effect forces the anti-pull-out device into the second position
Data Source
AI summary
A locking device includes a stator,with a rotor,andwith an anti-pull-out device for preventing a key from being pulled out over a rotational angle range,wherein the anti-pull-out device can be moved into a first position and into a second position,wherein the anti-pull-out device has an elastic design, wherein the elastic effect forces the anti-pull-out device into the second position. Theanti-pull-out device has a bent annular region for operatively connecting to the key, wherein the bent annular region includes at least one gap in the first position for introducing a key,wherein in the second position of the anti-pull-out device, the gap is modified such that the key is prevented from being inserted or from being pulled out.