Closure Device Actuating Element Elastic Locking Segments
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Solution Overview
Problem
Traditional closure devices, such as snap hooks, are difficult to handle and may unintentionally open when used as handles, especially in applications like bags with roll closure, due to their design and lack of secure locking mechanisms under load.
Innovation Solution
A closure device featuring an actuating element with at least partly elastic locking segments that form a frictional or snap connection with a retaining segment of the first closure element, allowing for a firm connection under load while being easily loosened, utilizing film hinges for mobility and a guide element to limit movement, ensuring secure locking and easy release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional snap hooks are used for coupling, then large tensile forces can be handled, but the device is hard and awkward to handle and may unintentionally open
Solution Approach 1:
The closure device transitions from a static snap hook design to a dynamic system with movable actuating element and elastic locking segments. The actuating element can be actively moved to engage or disengage locking segments, providing controlled operation while maintaining strength under load.
Solution Approach 2:
The elastic locking segments automatically engage with the actuating element when the closure device is closed, providing self-locking functionality. The system uses its own elastic deformation to maintain the locked state without requiring continuous external force, preventing unintentional opening while maintaining ease of operation.
2Reliability
If elastic locking segments are used to hold the actuating element, then the connection is firm under load, but the device complexity increases
Solution Approach 1:
The locking segments are made elastic and flexible, allowing them to deform and engage with the actuating element. This flexibility enables reliable locking through simple geometric engagement rather than complex mechanical interlocks, maintaining structural simplicity while ensuring firm connection under load.
Solution Approach 2:
The locking mechanism relies on changes in the elastic parameters of the locking segments. When the actuating element is moved, it changes the deformation state of the locking segments, transitioning between locked and unlocked states. This parameter-based control simplifies the overall structure compared to traditional mechanical locking systems.
3Strength
If the actuating element is firmly connected under load, then the closure is secure, but the device becomes difficult to release
Solution Approach 1:
The system maintains dynamic controllability through the actuating element, which can be actively moved to override the elastic locking segments. This allows the user to easily release the closure by applying force to the actuating element, which then disengages the locking segments, while maintaining strong connection during normal use when no release force is applied.
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 closure device provides a secure, firm connection capable of withstanding large forces and can be easily opened, preventing unintentional release, even under heavy loads, making it suitable for applications like pet leashes and baby carriers.
Implementation Method 1
an actuating element (4) with at least two spatially separated and at least partly elastic locking segments (41a, 41b)
Implementation Method 2
The connection between the actuating element and the first closure element is formed by an at least partly elastic (locking) segment, preferably by friction or snap action
Data Source
AI summary
A closure device is provided. The closure device includes a first closure element, a second closure element, which can be arranged on the first closure element in a fixing direction and which is connected to the first closure element in a closed state, and at least one actuating element, which is movably arranged on the second closure element. The at least one of the closure elements has a receptacle into which the other closure element can be shoved at least partially. The second closure element in the closed state is held on the first closure element via the actuating element and for this the second closure element interacts with the actuating element, while in an unloaded state the second closure element can be loosened from the first closure element by activating of the actuating element.