Lockable Carabiner Spring Layout for Compact Strength
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Solution Overview
Problem
Existing carabiners face challenges in achieving a balance between compactness and mechanical strength, with designs that are either bulky or prone to failure due to dust and mud accumulation, and complex locking mechanisms that increase manufacturing costs and susceptibility to stress.
Innovation Solution
A carabiner design featuring a C-shaped body with a pivotally mounted gate, a latch, and two springs that apply pressure to maintain the gate in a closed position without direct attachment to the body, along with a locking mechanism that allows for easy opening and closing while minimizing bulk and protecting the springs from dust and mud.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the gate and lock are attached to a C-shaped body with springs bearing against both the body and gate, then the carabiner can withstand stress along major and minor axes, but the body must be thick to resist all stresses, making the carabiner bulky
Solution Approach 1:
The spring system is segmented into two separate springs: a first spring bearing against the body and a second spring bearing against the gate. This segmentation allows each spring to independently manage specific stress components, eliminating the need for a thick body to withstand combined stresses from both directions simultaneously.
Solution Approach 2:
The first spring acts as an intermediary element between the body and the second spring, which in turn acts on the gate. This intermediary arrangement distributes and manages stress forces through a chain of elastic elements, reducing the structural demands on the body itself.
2Reliability
If a gate locking mechanism is used to prevent unintentional opening, then the carabiner security is improved, but the complexity of the locking mechanism increases manufacturing costs and susceptibility to stress
Solution Approach 1:
The locking mechanism is merged with the spring system itself. The first spring's bearing surface on the body serves dual purposes: providing elastic support and enabling the locking function through its positioning relative to the gate. This integration eliminates separate locking components while maintaining security.
Solution Approach 2:
The first spring performs multiple functions simultaneously: it provides elastic support to the gate, enables the locking mechanism through its geometric relationship with the body and gate, and contributes to the overall stress management system. This multi-functionality reduces the need for dedicated locking components.
3Device complexity
If the springs are directly attached to the body, then the structure is simplified, but the springs are exposed to dust and mud which reduces carabiner lifespan
Solution Approach 1:
The springs are extracted from direct contact with the external environment. The first spring bears against the body at a position that is not directly exposed to dust and mud, while the second spring bears against the gate in a protected configuration. This extraction isolates the spring system from harmful environmental factors.
Solution Approach 2:
The bearing surfaces of the springs are positioned at locations with different exposure characteristics: the first spring contacts the body in a relatively protected area, while the second spring contacts the gate in a manner that minimizes exposure to contaminants. This local differentiation of quality protects the springs from dust and mud accumulation.
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 achieves a better compromise between compactness and mechanical strength, reduces manufacturing complexity, and enhances the lifespan by protecting the springs from environmental contaminants, thereby improving reliability and ease of use.
Implementation Method 1
a first spring and a second spring, each having a first end connected to the finger and a second end connected to the lock, the first spring and the second spring each applying pressure to the finger so that a rest position of the finger is the closed position and applying pressure to the lock so that a rest position of the lock is the locked position
Implementation Method 2
a finger having a first end and a second end, the first end of the finger being fixed to the first end of the body, the finger being pivotally mounted between a closed position and an open position
Implementation Method 3
a latch fixed to the body and movable between a locking position and an unlocking position, the locking position locking the finger in the closed position
Data Source
Figure 1~7
AI summary
A carabiner comprises a body (1) and a gate (2) fixed to the body (1) so that it can move between the closed and open positions. A locking mechanism (3) is fixed to the body (1) and is movably mounted between locking positions and an unlocking position of the gate (2) in the closed position. A first spring (4) is connected to the gate (2) and the locking mechanism (3). The first spring (4) forces the gate (2) towards the closed position and forces the locking mechanism (3) towards the locked position. In the closed position, the first spring (4) is curved with a first average radius of curvature. In the open position, the first spring (4) is curved with a second average radius of curvature greater than the first radius of curvature.