Karabiner Hook with Integrated Blocking Element
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Solution Overview
Problem
Existing snap hooks require cumbersome and dangerous operation to achieve maximum opening angle due to limited pivoting angles and torque, necessitating separate actuation of the blocking element and closure part, especially when only one hand is available.
Innovation Solution
The blocking element is pivoted in the same direction as the closure part, allowing simultaneous actuation with a single finger, and features a recessed design to prevent unintentional pivoting, enabling automatic pivoting of the closure part to its maximum open position through rolling contact with the bracket's support surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the blocking element is actuated to pivot the closure part, then the closure part can be opened, but the opening angle is limited and only a small torque is exerted, requiring separate actuation of the closure part
Solution Approach 1:
The patent combines the blocking element and closure part into a single integrated unit where the blocking element is mounted on the closure part. When the blocking element is actuated, it simultaneously pivots the closure part about the closure part pivot axis, merging two previously separate operations into one unified action. This eliminates the need for separate actuation of the closure part and achieves full opening angle with a single operation.
Solution Approach 2:
The blocking element is designed to perform multiple functions: it blocks the closure part in the closed position, and when actuated, it serves as both the releasing mechanism and the actuating lever for opening the closure part. This multi-functionality reduces the number of separate components and operations needed, simplifying the overall device while maintaining safety and functionality.
2Reliability
If the blocking element pivots in the opposite direction to the closure part, then the blocking position is maintained, but the maximum opening angle is limited by the handle position
Solution Approach 1:
The patent inverts the traditional pivoting direction relationship between the blocking element and closure part. Instead of the blocking element pivoting in the opposite direction to maintain blocking while allowing closure part opening, both the blocking element and closure part pivot in the same direction. This inversion allows the blocking element's handle to move through a larger angular range, enabling the closure part to achieve its maximum opening angle without being constrained by handle position.
3Device complexity
If a short lever arm is used for actuating the blocking element, then the device structure is compact, but only a relatively small torque is exerted on the closure part
Solution Approach 1:
The patent employs dynamic lever arm configuration where the effective lever arm length varies during the actuation process. As the blocking element pivots, the perpendicular distance from the pivot axis to the line of action of the applied force changes, creating a dynamic torque profile. This allows for sufficient torque generation during the opening process while maintaining a relatively compact overall structure, as the lever arm extends optimally only when needed for actuation.
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
This design allows for safe, easy, and efficient one-handed operation by ensuring the closure part can be automatically pivoted to its maximum open position with minimal effort, enhancing usability and safety.
Implementation Method 1
the blocking element rolls with its contact surface, preferably without slipping, on the support surface of the bracket when pivoting about the blocking element pivot axis from the blocking position towards the release position
Implementation Method 2
When the closure part and the blocking element are released, they are pivoted back into the initial position by means of a return spring
Data Source
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AI summary
The karabiner has a closing part (2) and an insertion opening (3), which is closed by the closing part in a closed position. The closing part is pivotally mounted at a hoop (1) via a closing part pivot axle (4) for movement between the closed position and a maximally opened position. A blocking element is pivotally mounted at or in the closing part via blocking element pivot axle (6). The blocking element is pivotable out of a blocking position for pivoting the closing part out of the closed position in a direction towards the maximally opened position around the closing part pivot axle.