Hook Latch Trigger Mechanism Assembly
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Solution Overview
Problem
Existing hooks with locking latches often require external activation mechanisms, lacking a design where the trigger mechanism is entirely within the handle and can only be unlocked by retracting a finger trigger.
Innovation Solution
A hook design featuring a latch that is pivotable between closed and open positions, with a retractable finger trigger within the handle that, when retracted, disengages a wedge lock to allow the latch to open, utilizing a tension spring to maintain the latch in the closed position and an activating pin to engage the wedge lock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking latch mechanism is added to the hook, then the security and reliability of load retention is improved, but the device complexity and operational difficulty increase
Solution Approach 1:
The trigger mechanism is merged with the handle by positioning it entirely within the handle's internal space. The finger trigger is recessed into the handle body, and the activating pin connects the trigger directly to the wedge lock mechanism, integrating multiple functions into a unified structure that reduces overall device complexity while maintaining reliability.
Solution Approach 2:
The trigger mechanism is nested within the handle structure. The finger trigger is recessed inside the handle, the activating pin is housed within the handle's internal cavity, and the wedge lock is positioned within the latch assembly. This nested arrangement consolidates components into a compact configuration, reducing device complexity while ensuring secure load retention.
2Ease of operation
If the trigger mechanism is placed entirely within the handle, then the ease of operation and safety are improved, but the device complexity increases
Solution Approach 1:
The activating pin serves as an intermediary element that connects the finger trigger to the wedge lock mechanism. When the operator presses the finger trigger, the activating pin transmits this motion to disengage the wedge lock from the latch. This intermediary component simplifies the operational sequence while managing the internal complexity of the locking mechanism.
Solution Approach 2:
The tension spring automatically returns the wedge lock to its engaged position with the latch after the finger trigger is released. This self-service mechanism eliminates the need for additional actuators or complex control systems to reset the locking mechanism, thereby reducing device complexity while maintaining ease of operation.
3Reliability
If a wedge lock mechanism is used to secure the latch, then the reliability of the locking function is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The locking mechanism is segmented into distinct functional components: the wedge lock element that provides the locking action, the activating pin that transmits trigger motion, and the tension spring that provides resetting force. This segmentation allows each component to be manufactured independently using standard machining processes, reducing overall manufacturing complexity while ensuring reliable locking function.
Solution Approach 2:
Instead of using a complex multi-stage locking mechanism, the invention uses a simple wedge-shaped lock element that relies on geometric interlocking and spring force. The wedge lock engages with a corresponding recess in the latch, creating a reliable mechanical lock through inverted cone or wedge geometry that is straightforward to manufacture.
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
Enables secure locking and easy unlocking of the latch without requiring the operator to move their fingers outside the handle, enhancing safety and ease of use by ensuring the latch is only opened by retracting the finger trigger.
Implementation Method 1
a tension spring urging a wedge lock toward said closed position
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A hook with a latch and trigger mechanism assembly [10]. The assembly [10] includes a hook having a body [12] and an open saddle [14]. A latch [16] is pivotable between a closed position and an open position. A finger handle [20] extends from the body [12]. A finger trigger [22] entirely within a space between the finger handle [20] and the body [12] is movable between a closed rest position and a retracted position permitting movement of the latch [16] to the open position.