Clip Unit With Pressing Tube And Locking Mechanism
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Solution Overview
Problem
Existing clip units for tissue ligation, such as those used in endoscope treatment tools, face challenges in effectively grasping and securing tissues due to limitations in design, particularly in the mechanism for closing and locking the clip arms, which can lead to incomplete ligation or require excessive force.
Innovation Solution
A clip unit design featuring a clip main body with arm portions and a pressing tube that deforms to bring the arm ends together, incorporating locking portions and a helical spring for biasing the clip towards the pressing tube, allowing for controlled closure and secure locking of the clip around the tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing clip unit design is used, then the structure is simple, but the ligation reliability is insufficient due to incomplete closure and excessive force requirements
Solution Approach 1:
The clip unit employs a dynamic closure mechanism where the arm portion transitions from an opened state to a closed state through controlled movement. The pressing tube deforms elastically to bring arm ends together, and the locking portion engages with the locked portion to maintain the closed state, creating a dynamic system that adapts during operation
Solution Approach 2:
The clip unit is divided into distinct functional segments: the arm portion for grasping, the pressing tube for applying closing force, the locking portion for securing the closed state, and the helical spring for providing biasing force. This segmentation allows each component to perform its specific function efficiently
2Measurement precision
If the existing clip unit design is used, then the mechanism is simple, but the control precision over ligation process is poor
Solution Approach 1:
The engagement between the locking portion and locked portion provides mechanical feedback that confirms when the clip has reached the closed state. The helical spring's compression and expansion also provide tactile feedback during the closure process, enabling precise control without excessive complexity
Solution Approach 2:
The arm portion is pre-configured in an opened state with built-in elastic resilience, allowing it to automatically return to the closed position when released. The locking portion is pre-positioned to engage with the locked portion, ensuring precise closure without requiring complex control mechanisms
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 enables efficient and secure ligation of tissues with reduced force requirements and improved reliability, allowing for precise control over the ligation process and easy re-gripping of tissues.
Implementation Method 1
a helical spring for biasing the clip towards the pressing tube
Implementation Method 2
a pressing tube that deforms to bring the arm ends together
Data Source
AI summary
A clip unit including: a clip main body having a first arm portion, a second arm portion, and a middle portion; a pressing tube formed in a tube shape to be capable of accommodating the clip main body, the pressing tube being provided to deform the clip main body so as to make a distal end of the first arm portion and a distal end of the second arm portion to approach to each other, as the middle portion, the first arm portion, and the second arm portion are moved toward a proximal end side of the clip unit; a locking portion configured to protrude from an inner circumferential surface of the pressing tube on the proximal end side of the pressing tube; and a first locked portion configured to protrude from a lateral surface of the first arm portion.