Hood Lock Arresting Hook Layout for Compact Secondary Latching
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Solution Overview
Problem
Existing hood locks for motor vehicles are prone to unintentional opening due to external influences, posing a safety risk, and require additional space and interaction for complete opening, which hinders compact design and installation of other vehicle components.
Innovation Solution
A motor-vehicle lock design featuring a rotary latch, catch, and arresting hook with a locking and preliminary-latching position, allowing the arresting hook to be pivoted into a lowered position, reducing installation space and requiring minimal additional interaction for complete opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an arresting hook is used to secure the hood against unintentional opening, then safety is improved, but the lock mechanism requires additional space and interaction for complete opening
Solution Approach 1:
The patent combines the arresting hook function with the existing lock holder and locking mechanism. The arresting hook is integrated into the lock holder assembly, allowing it to be actuated through the same locking contour interaction. This merging eliminates the need for separate arresting hook actuation mechanisms and reduces overall system complexity while maintaining safety functionality.
Solution Approach 2:
The lock holder is designed to perform multiple functions: it engages with the locking mechanism, actuates the arresting hook through the locking contour, and provides the preliminary-latching position. This multi-functionality reduces the number of separate components needed and simplifies the overall lock mechanism while ensuring reliable hood securing.
2Area of stationary object
If the lock holder interacts with the locking contour to pivot the arresting hook into a lowered position, then installation space is reduced, but the mechanism requires precise interaction between components
Solution Approach 1:
The locking contour is designed as a curved surface that guides the lock holder's movement and pivots the arresting hook into the lowered position. The curved geometry provides gradual, controlled interaction between components, reducing the need for high-precision point contacts and allowing for manufacturing tolerances while achieving compact installation space.
Solution Approach 2:
The arresting hook is pivoted from a preliminary-latching position into a lowered position through rotational movement around a pivot axis. This dimensional change from linear engagement to rotational movement allows the hook to be repositioned out of the way, reducing the space required for the lock mechanism while maintaining secure engagement during the locking process.
Data Source
AI summary
A lock for a hood of a motor vehicle, having a locking mechanism with a rotary latch and at least one catch, having a lock holder, which can be brought into engagement with the locking mechanism, and having an arresting hook, wherein the arresting hook has a locking contour with a locking position and a preliminary-latching position, and wherein the arresting hook can be brought into a locking position by means of the lock holder interacting with the locking contour, wherein the locking position defines a lowered position of the arresting hook in relation to a preliminary-latching position.