Endoscopic Hemostatic Clip Locking Structure for Large-Wound Clamping
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Solution Overview
Problem
Hemostatic clips struggle to securely clamp large wounds due to high tissue tension, leading to insecure clamping and delayed bleeding from loosening and dropping off.
Innovation Solution
A hemostatic clip design featuring a clip holder with a guiding slot and avoidance slot, a movable pin, and a clamping assembly that allows the pin to move along the guiding slot to a locking position, utilizing a first limiting portion to maintain a closed state and prevent dropping off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional hemostatic clip is used to clamp large wounds, then the wound can be initially clamped, but the high tissue tension causes insecure clamping leading to loosening and dropping off
Solution Approach 1:
The patent applies the dynamics principle by introducing a movable pin that can transition between a releasing position and a locking position within the guiding slot. This dynamic mechanism allows the clip to initially clamp the wound with sufficient force, then lock into a secure positioned that prevents loosening under high tissue tension. The movable pin's ability to change position enables the system to adapt from a clamping state to a locked secure state, resolving the contradiction between initial clamping capability and sustained security.
Solution Approach 2:
The patent uses the movable pin as an intermediary element between the clamping assembly and the clip holder. This intermediary component mediates the force transmission and provides a locking function that enhances clamping security. The movable pin acts as a mediator that converts the clamping force into a locked position, preventing the clip from loosening under tissue tension while maintaining the necessary clamping force on the wound.
2Reliability
If the hemostatic clip is designed with a simple structure, then it is easy to manufacture and operate, but it cannot provide sufficient locking mechanism to prevent loosening on large wounds
Solution Approach 1:
The patent applies segmentation by dividing the clip structure into distinct functional components: a clip holder, a clamping assembly, and a movable pin within a guiding slot. This segmentation allows each component to perform its specific function - the clip holder provides structural support, the clamping assembly delivers clamping force, and the movable pin provides locking capability. By segmenting the structure, the patent achieves reliable anti-loosening capability without creating excessive overall complexity, as each segment remains relatively simple in its own right.
Solution Approach 2:
The dynamic movable pin mechanism adds locking functionality without significantly increasing overall device complexity. The pin's movement along the guiding slot provides a simple yet effective locking action that prevents loosening. This dynamic element achieves enhanced reliability through a straightforward mechanical motion rather than through complex multi-component systems.
3Reliability
If the hemostatic clip uses a fixed clamping structure, then it maintains stable position, but it cannot adapt to high tissue tension on large wounds causing insecure clamping
Solution Approach 1:
The patent resolves the contradiction between stability and adaptability by introducing a dynamic locking mechanism. The movable pin can adapt to high tissue tension by transitioning to a locked position that secures the clamping assembly against the clip holder. This dynamic adaptation allows the structure to respond to varying tension forces - maintaining flexibility during initial clamping and providing rigid stability when locked, thus achieving both adaptability to tension and reliable security.
Solution Approach 2:
The guiding slot is pre-configured with a specific geometry that guides the movable pin's movement. This preliminary structural design prepares the system for the locking action before tension is applied. The guiding slot's shape and positioning are predetermined to ensure that when tension occurs, the pin can smoothly transition to the locking position, providing adaptive response to tension forces without requiring complex real-time adjustments.
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 ensures persistent clamping force on large wounds, preventing delayed bleeding by maintaining the clips in a locked position, enhancing the reliability and effectiveness of hemostasis.
Implementation Method 1
the first limiting portion is configured to generate elastic deformation when subjected to compression of the movable pin, so as to make the movable pin movable along the guiding slot and detach from the first limiting portion
Data Source
AI summary
Hemostatic clip for endoscope is provided, including a clip holder and a clamping assembly, the clip holder has a passage provided to extend therethrough, a guiding slot communicating with the passage and an avoidance slot provided circumferentially along the clip holder and spaced apart from the guiding slot, the clip holder includes a first limiting portion, at least part of the first limiting portion is located in the guiding slot, and at least part of the first limiting portion is located between the guiding slot and the avoidance slot; and at least part of the clamping assembly is located in the passage, and the clamping assembly includes a movable pin and two clips connected to each other, with the movable pin threaded through the guiding slot; the clamping assembly can move relative to the clip holder along the passage, enabling the movable pin to move along the guiding slot.