Puncture Apparatus Automatic Activation Prevention Mechanism
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Solution Overview
Problem
Conventional puncture apparatuses with automatic puncture functions risk unintentional activation when the protection cover is opened during endoscopic procedures, leading to potential tissue damage due to the high-speed and powerful puncture mechanism.
Innovation Solution
A puncture apparatus design that includes a slider mechanism to maintain the needle tube in a retracted state and an unintentional operation preventive member to lock the operation section, ensuring it remains non-operational until the needle tube is exposed at a predetermined position, preventing accidental activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protection cover is provided to cover the operation switch, then unintentional activation is prevented, but the operation switch can be exposed by opening the protection cover prior to manual puncture, allowing erroneous automatic puncture to occur
Solution Approach 1:
The patent applies preliminary action by requiring the needle tube to be exposed from the sheath before the operation switch becomes accessible. The slider mechanism pre-positions the system in a safe state where the protection cover cannot be opened until the needle tube is already exposed, thus preventing unintentional activation before proper setup
Solution Approach 2:
The patent implements dynamics by making the accessibility of the operation switch dependent on the position of the slider. As the slider moves to expose the needle tube, the protection cover transitions from a locked to an unlocked state, dynamically adjusting operational accessibility based on procedural progress
2Force
If the automatic puncture mechanism provides high speed and powerful puncture, then puncture to stiffened object tissue is enabled, but the object tissue may be damaged if the mechanism is unintentionally activated
Solution Approach 1:
The patent applies preliminary anti-action by designing the slider mechanism to require deliberate manual exposure of the needle tube before the operation switch becomes accessible. This creates a preliminary protective action that counteracts the potential harmful effect of unintentional activation of the high-force puncture mechanism
Solution Approach 2:
The patent uses the slider mechanism as an intermediary between the high-force puncture mechanism and the user's ability to activate it. The slider acts as a mediating control element that must be manually positioned before the operation switch can be accessed, providing a safety buffer against accidental activation
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 effectively prevents unintentional activation of the automatic puncture function, ensuring safe operation by requiring manual exposure of the needle tube before allowing the automatic puncture mechanism to be activated, thus minimizing the risk of tissue damage.
Implementation Method 1
a coil spring, which is a type of elastic element, is provided in the needle tube-maneuvering section. The coil spring has a distal end that contacts the front end of the needle tube-maneuvering section and a proximal end that contacts the rear end of the slider. When the needle tube-maneuvering section is retracted toward the proximal end, the coil spring accumulates an ejection force for projecting the needle tube-maneuvering section toward the distal end.
Data Source
AI summary
The present invention is a puncture apparatus with an automatic puncture function, that includes: a hollow needle tube; a flexible sheath having the needle tube inserted therethrough; a main body having one of the ends of the sheath fixed thereto; a slider attached to the main body, the slider being capable of sliding in an axial direction relative to the main body; a needle tube-maneuvering section, attached to the slider, capable of sliding in an axial direction relative to the slider, the needle tube-maneuvering section having an end section of the needle tube fixed thereto; a retraction state-maintaining member for maintaining the needle tube-maneuvering section in the retracted state toward a proximal end; an urging member, provided in the needle tube-maneuvering section, for urging a retracted state of the needle tube-maneuvering section toward the distal end; an operation section for resetting the operation of the retraction state-maintaining member; releasing the ejection force; and projecting the needle tube-maneuvering section toward the distal end; and an unintentional operation preventive member, provided to the slider, for holding the operation section in an non-operating state, wherein the non-operating state of the operation section held by the unintentional operation preventive member can be reset only when the distal end of the needle tube is exposed by sliding the slider to a predetermined position relative to the main body.