Capillary Tube Connector Structure for Small-Animal Puncture Tools
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Solution Overview
Problem
Conventional puncturing tools for small animals face issues with correctly connecting capillary tubes, which can lead to insufficient insertion, falling off, and difficulty in maintaining stable sealing properties due to inclination, making it challenging to collect small amounts of blood reliably.
Innovation Solution
A puncturing tool with a hollow needle and a connecting part featuring a tapered peripheral wall and an elastic fitting part that facilitates easy insertion and connection of the capillary tube, providing tactile feedback and stable sealing through elastic deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional elastic tube structure is used for connecting the capillary tube, then the connection structure is simple, but it is difficult to grasp the connection status and the capillary tube may fall off or break
Solution Approach 1:
The patent uses visual indication features (color changes or visual markers) on the elastic fitting part to allow operators to easily grasp the connection status of the capillary tube. This enables reliable connection confirmation without complex structural indicators.
Solution Approach 2:
The elastic fitting part provides tactile feedback through resistance changes during insertion, and visual feedback through color or marker changes, allowing the operator to know when the capillary tube is correctly connected without complex indication systems.
2Ease of operation
If the capillary tube is allowed to incline for easier operation, then the ease of operation improves, but the sealing properties become unstable
Solution Approach 1:
The elastic fitting part is designed to be flexible and adaptable, allowing the capillary tube to incline during puncture operation while automatically adjusting to maintain stable sealing properties. The elastic material deforms to accommodate angle changes while preserving the seal.
Solution Approach 2:
The elastic fitting part changes its physical parameters (deformation, contact area) in response to inclination angles, allowing the system to adapt to different puncture angles while maintaining reliable sealing through elastic deformation.
3Difficulty of detecting and measuring
If the capillary tube insertion resistance gradually increases as in conventional structures, then the insertion is smooth, but it is difficult to grasp the connection status
Solution Approach 1:
The elastic fitting part provides distinct tactile feedback through resistance changes during insertion, and visual feedback through color or marker changes, allowing the operator to clearly detect when the capillary tube has reached the correct connection position.
Solution Approach 2:
Visual markers or color changes on the elastic fitting part provide clear indication of connection status, making it easy to detect whether the capillary tube is properly connected without disrupting the insertion process.
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 tool ensures easy grasping of the connection status, prevents capillary tube dislodgment, and maintains stable sealing properties, reducing blood leakage and damage during blood collection from small animals.
Implementation Method 1
the tapered peripheral wall includes an elastic fitting part configured to allow the capillary tube to be inserted, the elastic fitting part projecting inward from a lengthwise middle portion of the tapered peripheral wall
Data Source
AI summary
A puncturing tool for small animals which has a novel structure, facilitates confirmation of the connection state of a capillary tube, and can prevent inadvertent detachment of the capillary tube. A puncturing tool for small animals includes a connecting part for a capillary tube on the proximal end side of a hollow needle, wherein the connecting part has a tapered peripheral wall that expanding and extending in a direction away from the hollow needle, and a tapered peripheral wall has an elastic fitting part, through which the capillary tube is inserted, projecting inward from a middle portion of the tapered peripheral wall in the length direction thereof.