Vehicle Latch Mechanism Noise Reduction Guide
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Solution Overview
Problem
Vehicle latch mechanisms continue to produce undesirable noise despite the use of noise reduction techniques such as plastic components and angled surfaces, as the existing methods are insufficient in eliminating noise during latching and unlatching operations.
Innovation Solution
A vehicle latch mechanism featuring a striker receiving zone with first and second guide members, including cantilevered ends and intermediate portions, which guide the striker into the zone and reduce noise by eliminating clearance and decelerating the latch mechanism's operation, utilizing a spring clip for wear protection and a projection to further minimize noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If plastic components and angled surfaces are used to guide the striker, then noise is reduced, but noise still exists and is not fully eliminated
Solution Approach 1:
The guide structure is divided into multiple segments: a first guide surface on the striker receiving zone, a second guide surface on the striker, and a third guide surface on the latch mechanism. These segmented guide surfaces work together to progressively guide the striker, distributing the guidance function across multiple surfaces rather than relying on a single angled surface.
Solution Approach 2:
A guide member is introduced as an intermediary element between the striker and the latch mechanism. This guide member includes a guide surface that interfaces with both the striker and the latch mechanism, mediating their interaction to reduce noise during engagement while maintaining reliable latching.
2Object-affected harmful factors
If the striker is guided into the striker receiving zone, then noise is reduced, but the complexity of the latch mechanism increases
Solution Approach 1:
The guide member serves multiple functions: it guides the striker into the striker receiving zone, reduces noise during engagement, and maintains proper alignment between the striker and latch mechanism. By combining these functions into a single component, the design avoids adding multiple separate elements that would increase complexity.
Solution Approach 2:
The guide surfaces are integrated into the existing latch mechanism structure rather than being separate components. The first guide surface is formed on the striker receiving zone, and the guide member combines guidance and noise reduction functions, merging multiple features into unified structural elements.
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 proposed latch mechanism effectively reduces noise by guiding and decelerating the striker, minimizing unwanted noise during door operations through precise engagement and deflection of the guide members, enhancing the overall quiet operation of vehicle doors.
Implementation Method 1
A first guide member extends into the striker receiving zone from the first surface. A second guide member extends into the striker receiving zone from the second surface.
Data Source
AI summary
A vehicle latch mechanism includes a latch body having a striker receiving zone including a first surface and an opposing second surface. A first guide member extends along and is spaced from the first surface. The first guide member includes a first end, a second, cantilevered end, and an intermediate portion. A second guide member extends along and is spaced from the second surface. The second guide member includes a first end portion, a second cantilevered end portion, and an intermediate section. The second end and the second cantilevered end extend into the striker receiving zone.