Two-Piece Hemostatic Clip Assembly for Controlled Lock Release
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Solution Overview
Problem
Existing hemostatic clips with integrated clip pieces face issues such as fracture risk due to high connection force, difficulty in restoring the C-shape fitting portion, and complex locking mechanisms, leading to high production costs and inaccurate control over clip piece separation.
Innovation Solution
A hemostatic clip assembly with two-piece forceps and a pulling device, featuring a fixing member, locking mechanisms, and a sleeve, allowing for easy disassembly, flexible control, and simplified locking through a detachable connection system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the two clip pieces are solidly attached at the rear ends to form an integrated structure, then the connection strength is improved, but the risk of fracture increases due to the relatively great force during frequent opening and closing
Solution Approach 1:
The clip pieces are divided into separate components with proximal ends that can be detachably connected to the applicator handle. This segmentation allows the clip pieces to be independently replaceable, preventing fracture propagation and enabling easy replacement without affecting the other clip piece or the applicator handle.
Solution Approach 2:
The design enables the clip pieces to be easily separated from and reconnected to the applicator handle. When a clip piece becomes worn or damaged, it can be discarded and replaced with a new one, while the applicator handle is recovered and reused. This reduces the risk of fracture by allowing timely replacement rather than continued use of degraded components.
2Ease of manufacture
If the applicator handle is connected to the proximal end of each clip piece through a C-shaped fitting portion, then the connection is simplified, but the recoverability deteriorates because the C-shape fitting portion cannot be restored after separation
Solution Approach 1:
The connection between the applicator handle and clip pieces is designed to be dynamic and reversible. The detachable connection mechanism allows the applicator handle to be repeatedly connected to and separated from different clip pieces, with each component maintaining its structural integrity and ability to be reconnected. This dynamic design replaces the static C-shaped fitting with a reusable connection system.
3Reliability
If a deformable structure is added to lock the clip pieces with the casing in a closed state, then the locking reliability is improved, but the production cost increases
Solution Approach 1:
The clip pieces are designed with self-locking features that enable them to automatically lock with the applicator handle without requiring additional deformable structures. The self-service locking mechanism reduces production costs by eliminating complex deformable components while maintaining reliable locking through the inherent geometry and elasticity of the clip piece structure.
4Measurement precision
If the locking and separation need to overcome double resistance, then the control precision is improved, but the device complexity increases requiring accurate structural design and material selection
Solution Approach 1:
The resistance-overcoming process is segmented into distinct stages: first overcoming the connection resistance between the applicator handle and clip pieces, then overcoming the locking resistance between the clip pieces and casing. This segmentation allows each resistance to be independently optimized and controlled, reducing the need for complex coordinated design while maintaining precise control over the timing of each separation event.
Data Source
AI summary
Disclosed is a hemostatic clip assembly. The hemostatic clip assembly comprises a sleeve, the two-piece forceps, and a pulling device connected with the two-piece forceps. The two-piece forceps and the pulling device are at least partially located within the sleeve. The two-piece forceps include a fixing member and two clip pieces each of which includes a first clip section and a second clip section. The fixing member is provided through the second clip section. The second clip section is provided with a first locking mechanism and a second locking mechanism. An end of the pulling device is detachably connected with the two-piece forceps. The sleeve is provided with a third locking mechanism. The two-piece forceps move toward a proximal end under an action of the pulling device when the pulling device is disconnected from the second locking mechanisms. The pulling device includes a rod portion and a connection portion.