Rotating Membrane Holder for Automated Syringe Needle Puncture Testing
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Solution Overview
Problem
Existing mechanical test systems lack an efficient and automated method to securely hold and rotate a membrane for puncture testing of syringe needles, leading to inaccurate results and inefficiencies.
Innovation Solution
A fixture for an automatic needle injection system is designed, comprising a housing with a chamber and a holder that secures a membrane. The holder is configured to allow a syringe needle to pass through and into the chamber, and it can rotate within the housing, ensuring a new, unused portion of the membrane is punctured for each test run.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a membrane is held in a stationary position for puncture testing, then the testing setup is simple, but the same portion of the membrane cannot be reused for multiple tests, reducing efficiency
Solution Approach 1:
The holder is designed to rotate within the housing, transforming the stationary membrane holding approach into a dynamic system. This rotation allows different portions of the membrane to be positioned for puncture testing, enabling reuse of the membrane for multiple tests while maintaining a relatively simple fixture structure.
Solution Approach 2:
The fixture is designed to accommodate multiple test runs with a single membrane by enabling rotation. This multi-functional capability allows the same fixture to perform repeated puncture tests on different portions of the same membrane, improving productivity without requiring multiple separate testing setups.
2Measurement precision
If manual positioning of membrane portions is used, then the device structure is simple, but positioning accuracy and tension maintenance are poor, reducing measurement precision
Solution Approach 1:
The rotatable holder provides controlled movement of the membrane to different positions, replacing manual positioning. This dynamic adjustment mechanism ensures accurate positioning of membrane portions while maintaining proper tension, leading to more precise puncture testing measurements.
3Reliability
If the holder cannot rotate, then the fixture structure is simple, but the same membrane portion must be reused, causing inaccurate results due to prior punctures
Solution Approach 1:
The rotation capability of the holder allows the system to move to fresh portions of the membrane for each test, eliminating the problem of repeated punctures in the same location. This dynamic repositioning ensures reliable and accurate testing results while maintaining a relatively simple rotational mechanism.
Data Source
AI summary
A fixture for an automatic needle injection is disclosed, wherein the fixture comprises a housing including a chamber, the housing including a first plurality of walls, a second plurality of walls, and a third plurality of walls, a holder, and a membrane; wherein the membrane is contained in the holder, the holder is secured within a portion of the housing, and the holder is configured to allow a portion of a needle of a syringe to pass through a portion of the holder and into the chamber of the housing.