Push-Button Cutter Lock Structure Against Accidental Blade Ejection
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Solution Overview
Problem
Existing push-button cutters lack a protection lock structure, leading to the risk of the blade being accidentally pushed out of the housing due to non-human active external forces.
Innovation Solution
A protection lock structure featuring a lock button with a locking portion and a limiting portion, allowing the lock button to assume a locking or unlocking state, ensuring the blade can only be pushed out when in an unlocked state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no protection lock structure is provided, then the structure remains simple, but the blade may be accidentally pushed out by non-human active external forces
Solution Approach 1:
The protection mechanism is segmented into distinct functional components: a lock button with locking portion, an adapter piece with limiting portion, and a positioning apparatus. This segmentation allows each component to perform its specific function independently while maintaining overall structural simplicity.
Solution Approach 2:
The lock button acts as an intermediary element between the push button and the blade. It mediates the force transmission by either allowing or blocking the adapter piece's movement, thereby preventing accidental blade ejection while maintaining simple operation.
2Reliability
If a protection lock structure is added, then the reliability improves, but the device complexity increases
Solution Approach 1:
The locking function is merged with the existing push button mechanism by integrating the lock button into the same assembly. The lock button shares the housing mounting and works in conjunction with the adapter piece, reducing the need for entirely separate locking components.
Solution Approach 2:
The lock button serves multiple functions: it acts as a locking mechanism, a positioning element, and an operational interface. The same component structure is used for both locking and unlocking operations, reducing the need for separate mechanisms.
3Reliability
If the locking portion is always engaged with the limiting portion, then the blade is always protected, but the blade cannot be pushed out for use
Solution Approach 1:
The locking mechanism is designed to be dynamic rather than static. The lock button can transition between two stable positions: engaged with the limiting portion for protection, and disengaged for blade deployment. This dynamic capability allows the system to switch between safety and operational states.
Solution Approach 2:
The lock button is preliminarily positioned to engage with the limiting portion, preventing blade ejection before any accidental force can act on the push button. The user must deliberately act on the lock button first to disengage this preliminary protective state.
Data Source
AI summary
A protection lock structure for a push-button cutter includes a lock button and a limiting portion arranged on an adapter piece. The lock button is provided with a locking portion, the lock button is mounted on a housing and at least forms a first relative position and a second relative position with the housing. In the first relative position, the locking portion is abutted against the limiting portion, and in the second relative position, the locking portion is separated from the limiting portion.