Pivoting Hook Fastening Device for Work Tool Release
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Solution Overview
Problem
Existing arrangements for working implements and carrying arrangements often require complex mechanisms for quick release, which can be cumbersome and difficult to operate with one hand, especially when the weight of the implement causes the eyelet to slide out of the hook unintentionally.
Innovation Solution
A fastening device with a hook that spirally curves from the contact point to the entry opening, allowing the eyelet to slide out due to the implement's weight, and is spring-mounted for secure fixation, featuring a stop to maintain the rotational position and a bearing element for easy operation, ensuring the eyelet can be easily released and reattached without requiring excessive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hook is designed with a complex mechanism to prevent accidental release, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The hook utilizes dynamic positioning where the contact point moves relative to the eyelet during operation. In the fastening position, the contact point is positioned to securely hold the eyelet, while in the release position, the contact point moves to a location that allows easy detachment. This dynamic adjustment resolves the contradiction by providing both secure holding and easy release without complex mechanisms.
Solution Approach 2:
The weight of the implement itself serves the dual function of both securing the connection and facilitating release. When detached, the implement's weight causes the contact point to move to a position that enables easy reattachment. This self-service mechanism eliminates the need for additional complex components while maintaining both reliability and ease of operation.
2Reliability
If the hook is spring-mounted to secure the implement, then reliability is improved, but device complexity increases
Solution Approach 1:
The implement's own weight is utilized to provide the securing force through the spring mechanism. As the implement hangs from the hook, its weight automatically compresses the spring to the appropriate degree, creating secure fixation without requiring additional active components. This self-service approach maintains reliability while minimizing device complexity.
3Ease of operation
If the inner contour of the hook runs upwards to the entry opening, then ease of operation is improved, but the eyelet may not slide out reliably due to gravity
Solution Approach 1:
The inner contour of the hook is designed with dynamic characteristics where the contact point position changes based on the hook's rotational state. During attachment, the contact point is positioned to guide the eyelet easily. During release, the contact point moves to a position where gravity assists in sliding the eyelet out, thus resolving the contradiction between ease of attachment and reliable release.
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 quick and easy detachment of the working device from the carrying arrangement using one hand, with the weight of the implement facilitating release and secure attachment, reducing operational forces required and preventing accidental slippage.
Implementation Method 1
The hook is advantageously spring-mounted in the direction of the fastening position of the fastening device. This ensures that the implement is securely fixed to the carrying strap during operation.
Implementation Method 2
Due to the fact that the eyelet slides out of the hook in the release position of the hook due to the weight of the implement
Data Source
Figure 1~3
Figure 4~8
Figure 9~12
AI summary
A carrying arrangement for a work tool comprises a carrying strap (8) and a releasable fastening device (10) for attaching the work tool to the carrying strap (8). The fastening device (10) is adjustable from a fastening position (37) to a release position (38) by means of an actuating device. The fastening device (10) comprises a pivoting hook (11) which, in the fastening position (37), is engaged in an eyelet (9) and holds the work tool to the carrying arrangement. When the carrying arrangement is positioned on the user (7) and the work tool is attached to the carrying arrangement, the hook (11) is pivoted when the fastening device (10) is adjusted from the fastening position (37) to the release position (38) such that the eyelet (9) slides out of the hook (11) due to the weight force (24) of the work tool.