Safety Hook Trigger Mechanism Prevents Accidental Release
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Solution Overview
Problem
Conventional safety hooks can be easily detached from guide rails or ropes due to accidental impacts, posing a safety risk for aerial workers as the trigger member may unintentionally unblock the hook body.
Innovation Solution
A safety hook design featuring a hook body with a base segment, a curved hook segment, and an auxiliary hook segment, along with a trigger unit comprising a keeper member and a trigger member, where the keeper member pivots between released and pressed positions to control the blocking and unblocking of the hook body's opening, ensuring secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional safety hook uses a simple trigger member to block the opening, then the device complexity is reduced and ease of manufacture is improved, but the reliability deteriorates as the trigger member can be easily driven to unblock the opening through accidental impact or depression
Solution Approach 1:
The trigger unit is segmented into two distinct members: a keeper member connected to the hook body and a trigger member connected to the keeper member. This segmentation allows the trigger member to be controlled by the keeper member, preventing accidental unblocking while maintaining operational simplicity. The trigger member can only be actuated when the keeper member is intentionally pressed, resolving the contradiction between reliability and device complexity.
2Ease of operation
If the trigger member is made easily movable to allow quick release, then the ease of operation is improved, but the reliability deteriorates as accidental impacts can easily drive the trigger member to unblock the opening
Solution Approach 1:
The keeper member is configured to be pressed in advance before the trigger member can be actuated. This preliminary action ensures that the trigger member cannot be accidentally moved by impacts during normal operation, as the keeper member must first be intentionally pressed to enable trigger member movement. This resolves the contradiction by maintaining ease of operation through intentional pressing while preventing accidental activation.
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 design enhances safety by preventing accidental unblocking of the hook body, providing a more secure attachment to guide rails or ropes, thus reducing the risk of detachment during aerial work.
Implementation Method 1
The keeper member is operable to pivot relative to the base segment between a released position and a pressed position
Implementation Method 2
The keeper member is operable to pivot relative to the base segment between a released position and a pressed position, so as to drive the trigger member to move relative to the hook body
Data Source
AI summary
A safety hook includes a hook body and a trigger unit. The hook body has an opening. The trigger unit includes a keeper member and a trigger member. The keeper member is connected to the hook body. The trigger member is connected to the keeper member. The keeper member is operable to pivot relative to the hook body. The trigger member engages the hook body, and is unable to pivot relative to the keeper member so as to block the opening of the hook body when the keeper member is at a released position. The trigger member is moved via the keeper member to be disengaged from the hook body, and is able to pivot to unblock the opening of the hook body when the keeper member is at a pressed position.