Motor Vehicle Locking Device Spring Lip Control Element
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Solution Overview
Problem
Existing child safety devices in motor vehicle locking systems face challenges in achieving long-term stability and high actuating forces, particularly when using less elastic materials and higher spring forces.
Innovation Solution
A child safety device with a control element and a spring element designed as a spring lip, which interacts with a control cam to adjust into latching positions, and includes a support means to enhance spring deflection and stability, allowing the use of inelastic materials like glass-fiber reinforced plastics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If higher spring forces are used to achieve long-term stability of child safety devices, then reliability is improved, but the elasticity of plastics materials deteriorates
Solution Approach 1:
The control element is segmented into a body portion and a spring lip portion that can deflect independently. The spring lip is designed as a separate elastic element that can be made from materials with different properties than the main control element body, allowing the bulk of the control element to be made from stronger, less elastic materials while maintaining the necessary elasticity in the spring lip for reliable operation
Solution Approach 2:
The patent employs composite construction by integrating a spring lip made from elastic material into a control element that may use stronger, less elastic plastics materials. This allows combining materials with complementary properties: the spring lip provides elasticity for repeated actuation while the main body provides structural strength and stability
2Reliability
If plastics materials with higher strength and toughness are used, then reliability is improved, but permanent elasticity deteriorates
Solution Approach 1:
The control element is divided into functional segments: the main body can be made from high-strength plastics while the spring lip is designed as a separate element that relies on elastic deformation. This segmentation allows each part to be optimized for its specific function without compromising the other
Solution Approach 2:
Different regions of the control element have different material properties tailored to their specific functions. The spring lip region is designed with elastic characteristics for repeated deformation, while the main body region uses stronger materials for structural integrity and resistance to permanent deformation
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 enables safe and long-term stable latching positions even with higher spring forces, increasing the spring force by approximately 25% and ensuring high functional reliability and stability.
Implementation Method 1
a spring element on the control element, wherein the spring element interacts with a control cam in such a way that the control element is adjustable in a spring-loaded manner into the latching position
Data Source
AI summary
The invention relates to a motor vehicle locking device comprising a locking mechanism having a rotary latch and at least one pawl, an actuating lever mechanism acting on the pawl, and a child safety device having a control element (1), wherein the control element (1) is latchable in at least two latching positions (R1, R2), and a spring element (3) on the control element (1), wherein the spring element (3) interacts with a control cam (2) in such a way that the control element (1) is adjustable in a spring-loaded manner into the latching positions (R1, R2), and wherein the spring element (3) is designed as a spring lip (3).