Insertable Gripper with Bendable Arms for Endoscopic Insertion
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Solution Overview
Problem
Existing gripping instruments for medical applications, such as hemostatic clamps, have complex structures and large sizes, which can cause discomfort and damage to patients due to their elongated design, and alternative designs with more parts and complex mechanisms increase cost and complexity.
Innovation Solution
An insertable gripping instrument with a gripper featuring integrally formed gripping arms and a bendable portion that can deform to open and close, eliminating the need for a sleeve and reducing the overall length, while using a moving member to control the opening and closing through a deformable structure with shrinkage slits and limiting elements for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gripping arms are retracted into a sleeve to achieve closing, then the gripping function is realized, but the overall length of the hemostatic clamp becomes longer, causing more damage and discomfort to the patient
Solution Approach 1:
The patent removes the sleeve component from the traditional hemostatic clamp structure. Instead of retracting gripping arms into a sleeve, the invention uses a snap-action mechanism where the gripping arms directly snap between open and closed positions, eliminating the need for a sleeve and thereby reducing the overall length of the device.
Solution Approach 2:
The patent introduces a snap-action dynamic mechanism that allows the gripping arms to transition quickly between open and closed positions through a snapping motion. This dynamic approach replaces the static retraction mechanism, enabling the gripping arms to achieve closing without requiring the axial space needed for sleeve retraction.
2Measurement precision
If a rotating shaft and sliding rail mechanism is used to improve control accuracy, then control precision is enhanced, but the number of parts increases, making the structure more complex and cost higher
Solution Approach 1:
The patent combines the gripping arm and the control mechanism into a more integrated structure. The snap-action mechanism is built into the gripping arm assembly itself, eliminating the need for separate rotating shafts and sliding rails. This merging reduces the number of parts while maintaining control accuracy through the snap-action design.
Solution Approach 2:
The gripping arm in the patent is designed to be self-controlling through its snap-action mechanism. The structure includes built-in cam surfaces or elastic elements that automatically provide the snapping motion and control the opening and closing actions without requiring external shafts or rails, thereby simplifying the overall structure.
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 new design achieves a simpler, more compact structure with reduced assembly requirements and lower costs, allowing for easier insertion through endoscopic channels and improved control accuracy, while minimizing patient discomfort and damage.
Implementation Method 1
the bendable portion having a deformable structure capable of bending in a closing direction of the gripper and/or bending in an opening direction of the gripper
Data Source
AI summary
A insertable gripping instrument and a gripper thereof. The gripper comprises at least two gripping arms. Each gripping arm comprises a gripping head and a bendable portion. The gripping arms are used to grip a target object. Each bendable portion is provided with a deformation structure capable of bending towards the closing direction of the gripper and/or bending towards the opening direction of the gripper. In the present structure, the sleeve in existing structures is omitted, and in combination with the deformation state of the bendable portion, the gripper open and close on the basis of the position change of moving members.