Capillary Holder Movable Fixing Body Blood Sampling
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Solution Overview
Problem
Existing capillary holders for blood sampling require direct handling and assembly/disassembly of the capillary, making them cumbersome and prone to contamination.
Innovation Solution
A capillary holder design featuring an elongated hollow body with a movable fixing body, allowing for easy recording and fixation of a capillary section without the need for springs, facilitating one-handed operation and reducing contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the capillary is firmly connected to the collection vessel with a stopper, then the capillary can be securely fixed, but the device becomes cumbersome requiring assembly and disassembly operations
Solution Approach 1:
The device is divided into separate functional components: a hollow body for collection, a fixing body for securing the capillary, and a capillary itself. The fixing body can move independently within the hollow body to transition between receiving and fixing states, eliminating the need for separate assembly and disassembly operations while maintaining secure fixation.
Solution Approach 2:
The fixing body is designed to be movable along the longitudinal axis of the hollow body, transitioning between a receiving state (where the capillary can be inserted) and a fixing state (where the capillary is secured). This dynamic mechanism allows automatic fixation without manual assembly, improving ease of operation while maintaining reliability.
2Ease of operation
If a spring mechanism is provided to move the fixing body, then the capillary can be automatically fixed, but the device complexity increases and environmental disposal becomes difficult
Solution Approach 1:
The hollow body and fixing body are designed to be disposable, particularly when made from cardboard or similar environmentally friendly materials. This eliminates the need for complex reusable mechanisms like springs, simplifies the device structure, and facilitates environmentally friendly disposal after single use.
Solution Approach 2:
The fixing body moves automatically along the longitudinal axis of the hollow body to transition between receiving and fixing states without requiring external spring mechanisms. The design allows the capillary holder to self-fix the capillary through simple insertion movements, reducing mechanical complexity while maintaining automatic fixation functionality.
3Ease of manufacture
If the capillary holder is made from environmentally friendly materials like cardboard, then it can be easily disposed of and absorb liquid accidents, but the structural strength may be reduced
Solution Approach 1:
The hollow body and fixing body are designed as thin-walled structures that can be made from flexible materials like cardboard. The geometric design and movable fixing body compensate for the lower material strength, maintaining functional integrity while enabling environmental friendliness and liquid absorption capabilities.
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 capillary holder enables efficient and contamination-free blood sampling by allowing capillary handling without direct contact, with the capillary being securely fixed within the holder, and the holder being easily disposable, particularly if made from environmentally friendly materials like cardboard.
Implementation Method 1
the capillary is pressed against a counter-surface formed by the first recess in the casing of the hollow body by a force acting on it via the fixing surface in order to fix the capillary
Implementation Method 2
DE 20 2004 004 951 U1 discloses a device for collecting capillary blood, comprising a blood collection vessel formed at its front end with a capillary that automatically draws in the blood
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
The invention relates to a capillary holder (1) comprising an elongated hollow body (2) and an elongated fixing body (3) which is at least partially arranged in the hollow body (2); wherein the fixing body (3) is movable along the longitudinal axis (4) of the hollow body (2); wherein a shell (6) of the hollow body (2) has a first recess (9) which is configured to receive a section (10) of a capillary (11) such that a longitudinal axis (12) of the capillary (11) is substantially perpendicular to a longitudinal axis (4) of the hollow body (2);and wherein the fixing body (3) has a fixing surface (21, 22) which is arranged to bear against the section (10) of the capillary (11) received in the first recess (9) in such a way that the capillary (11) is pressed by a force acting on it via the fixing surface (21, 22) against a counter surface (19, 20) formed by the first recess (9) in the shell (6) of the hollow body (2) in order to fix the capillary (11) between the fixing surface (21, 22) and the counter surface (19, 20).