Hemostatic Clip Split Structure Simplifies Assembly
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Solution Overview
Problem
Current hemostatic clips used in endoscopic hemostasis have complex assembly structures that can lead to parts falling during use, causing medical accidents, and are expensive due to CNC machining methods that require the 'small into large' assembly principle, making them costly and difficult to manufacture.
Innovation Solution
A hemostatic clip with a split structure that includes a control portion and a releaser, featuring a grip, handle, spring tube, mandrel, clamp with a barb, and internal socket, utilizing a middle and outer ring with limiting mechanisms to simplify assembly and reduce costs, allowing for flexible clamping angle adjustment and easy release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If CNC machining is used to manufacture hemostatic clips, then manufacturing precision is improved, but device complexity and cost increase due to the 'small into large' assembly principle requirement
Solution Approach 1:
The hemostatic clip is divided into multiple independent components: a control portion (including grip, handle, spring tube, mandrel, clamp, and internal socket) and a releaser portion (including middle ring and outer ring). This segmentation allows each component to be manufactured separately using simpler, more cost-effective methods while maintaining overall assembly precision through standardized interfaces and limiting mechanisms.
2Adaptability or versatility
If complex assembly structures are used in hemostatic clips, then functional performance is improved, but reliability deteriorates due to parts falling during use
Solution Approach 1:
The clip incorporates a dynamic release mechanism where the grip can slide along the mandrel to adjust the clamping angle, and the middle ring can rotate relative to the outer ring to control the clamp's opening and closing. This dynamic design provides functional versatility while maintaining reliability through positive mechanical limits and barbs that prevent unintended part separation.
3Reliability
If integrated structure is used in hemostatic clips, then reliability is improved by preventing parts falling, but ease of manufacture deteriorates due to CNC machining requirements
Solution Approach 1:
The design employs nested structures where the internal socket fits within the clamp, the middle ring fits within the outer ring, and the mandrel passes through multiple components. This nesting approach allows separate manufacturing of each component using simple, cost-effective methods while ensuring reliable assembly through interference fits and mechanical limits that prevent parts from separating during use.
4Ease of manufacture
If simple structure is used in hemostatic clips, then ease of manufacture is improved, but device complexity increases due to assembly challenges
Solution Approach 1:
The design incorporates preliminary positioning features such as the barb on the clamp that engages with the internal socket, and the limiting mechanisms between the middle ring and outer ring that pre-establish correct component orientation and position. These preliminary actions guide the assembly process, making it straightforward despite multiple components, while maintaining manufacturing simplicity for each individual part.
Data Source
AI summary
The invention provides a hemostatic clip with a split structure, which includes a control portion and a releaser. The control portion includes a grip, a handle, a spring tube, a mandrel, a clamp with a barb at the end, and an internal socket. The releaser includes a middle ring and an outer ring. The handle is connected with the outer ring through the spring tube. The outer ring is sleeved on the outside of the middle ring, and an inner side of the outer ring and an outer side of the middle ring are provided with a first limiting mechanism that limits a radial movement of the middle ring toward a proximal end. The middle ring is provided with a tightening tube. A distal end passes through the outer ring, the middle ring and the tightening tube in sequence, and then is connected with the clamp through the internal socket.