Rotatable Detachable Coupling Part for Endoscopic Shank
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Solution Overview
Problem
Endoscopic instruments with continuous rinsing face a large outer diameter, potentially traumatizing surrounding tissue, while those with intermittent rinsing restrict rotation of the working insert, leading to tissue traumatization. Existing designs either have a large diameter or limit rotation, failing to minimize tissue burden effectively.
Innovation Solution
An endoscopic instrument with a hollow shank and a detachable, rotatably mounted coupling part that allows the working insert to rotate independently of the shank, using an annular axial seal for fluid-tight connection and easy cleaning, with a slide valve for selective rinsing or suction channel connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a continuous flow shank with double walls is used to allow rotation of the working insert, then the working insert can rotate independently, but the outer diameter becomes very large which burdens the surrounding body tissue
Solution Approach 1:
The shank is divided into two functional segments: a simple hollow shank for insertion and a detachable coupling part that attaches to the working insert. This segmentation allows the working insert to rotate via the coupling part while the main shank remains thin and stationary, resolving the contradiction between enabling rotation and minimizing shank diameter.
Solution Approach 2:
A detachable coupling part acts as an intermediary between the simple hollow shank and the working insert. This coupling part enables the working insert to rotate independently while being connected to the thin shank, avoiding the need for a large-diameter continuous flow shank while still permitting rotation of the working insert.
2Area of stationary object
If a simple hollow shank with intermittent rinsing is used, then the outer diameter is significantly smaller, but the working insert may only be rotated together with the shank which traumatizes the surrounding tissue
Solution Approach 1:
The system is segmented into a simple hollow shank and a detachable coupling part with the working insert. The coupling part is designed to rotate independently on the shank, allowing the working insert to rotate without moving the thin shank, thus avoiding tissue traumatization while maintaining a small outer diameter.
Solution Approach 2:
The coupling part is designed with rotational freedom relative to the shank, allowing dynamic rotation of the working insert while the shank remains stationary. This dynamic capability enables the working insert to be oriented and rotated as needed without moving the thin shank, preventing tissue damage.
3Ease of repair
If the coupling part is detachably connected to the connection part, then the coupling part can be separated for cleaning purposes, but additional connection components are required
Solution Approach 1:
The coupling part is designed with a universal detachable connection that serves multiple functions: it allows the coupling part to be attached to and detached from the shank for cleaning, and it provides the rotational mechanism for the working insert. This multi-functionality reduces the need for separate complex components while enabling easy cleaning.
Data Source
AI summary
An endoscopic instrument with a hollow shank which on the proximal side is provided with a connection part with at least one suction connection and/or rinsing connection, with a coupling part for fixing a working insert. The coupling part is mounted rotatably with respect to the connection part and the coupling part is detachably connected to the connection part. The endoscopic instrument further includes an annular axial seal which is arranged between the connection part and the coupling part.