Two-Stage Clasp Mechanism Prevents Accidental Release
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Solution Overview
Problem
Typical clasp mechanisms, such as side release buckles, can unintentionally disconnect due to accidental contact with external objects, leading to insecure fastening of components, particularly in wearable devices and other applications where childproofing is necessary.
Innovation Solution
A two-stage clasp mechanism that requires a sequence of two actions to release the second housing portion from the first, involving a sliding element and a button, where the button cannot be compressed until the sliding element is moved to a specific position, ensuring that both actions must be intentionally performed to disengage, thereby reducing accidental disengagement and childproofing the mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a typical side release buckle is used, then quick connection and disconnection is achieved, but the clasp can be easily unintentionally disconnected
Solution Approach 1:
The release mechanism is divided into two independent stages: a first stage requiring movement of a first component (e.g., sliding element) and a second stage requiring movement of a second component (e.g., button or lever). This segmentation ensures that accidental contact with one component does not trigger full disengagement, as the second stage remains locked until intentionally activated. The patent applies this by creating a sequential dependency where the first component must be moved before the second component can be activated, thereby preventing unintentional release while maintaining user-controlled quick release when both stages are deliberately actuated.
2Reliability
If a two-stage mechanism is implemented, then accidental disengagement is reduced, but the release process becomes more complex
Solution Approach 1:
The patent merges the two-stage release mechanism into a single integrated clasp housing structure, where the first and second components are positioned and linked within the same housing. This integration allows the complex two-stage functionality to be achieved without proportionally increasing overall device complexity, as shared structural elements (housing, mounting points, linkage mechanisms) serve both stages. The components are arranged to utilize common space and structural support, reducing the cumulative complexity burden of having two independent mechanisms.
Solution Approach 2:
The patent introduces intermediate elements such as linkages, cam mechanisms, or biasing springs that mediate between the first and second components. These intermediaries translate the movement of the first component into conditions that enable or facilitate the second component's movement, creating a controlled sequential release. The intermediary mechanisms ensure that the first action must occur before the second, providing the two-stage safety feature while using mechanical mediation to manage the complexity of coordinating two release actions within a unified structure.
3Reliability
If a two-stage mechanism is implemented, then childproofing is achieved, but the operation requires more steps
Solution Approach 1:
The patent employs dynamic elements such as spring-loaded components, movable barriers, or position-dependent locking features that change state based on the sequence of operations. The first component's movement dynamically alters the mechanical state of the system, creating a new configuration that enables or exposes the second component for activation. This dynamic transition ensures that children cannot accidentally trigger release by simply pressing any single point, as the system's mechanical state must progress through a specific sequence. For authorized users, the dynamic states are designed to be intuitively navigable through deliberate sequential actions.
Data Source
AI summary
Two-stage clasp mechanisms, and related systems and methods, are disclosed herein. In some embodiments, the clasp mechanism includes a first housing portion, a second housing portion configured to connect to the first housing portion, and a locking mechanism configured to secure the first and second housing portions together. The locking mechanism can include a first striker carried by the second housing portion, a second striker movably carried by the first housing portion, and a blocking component movably carried by the second housing portion. The second striker is moveable along a first direction between an engaged position and a disengaged position with the first striker. The blocking component is movable along a second direction at an angle with respect to the first direction between a first position that prevents the first striker from moving and a second position that allows the second striker to move.