Lab-on-a-chip Cartridge Coupling via Sequential Pneumatic and Mechanical Actuation
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Solution Overview
Problem
Current lab-on-a-chip analyzer systems face challenges in efficiently coupling cartridges with microfluidic systems, particularly in releasing reagents into the microfluidic network without interference, due to complex mechanical and pneumatic actuation requirements.
Innovation Solution
A device with a clamping unit that performs translatory movements to pneumatically contact the cartridge and insert a punch into the reagent chamber, allowing for precise control of pneumatic pressure and reagent release, featuring a single mechanical actuation unit for cost-effective and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single mechanical actuation unit is used for both pneumatic contacting and punch introduction, then device complexity is reduced and cost is lowered, but the precision and reliability of reagent release control may be compromised
Solution Approach 1:
The single mechanical actuation unit is segmented into two functional components: a pneumatic interface for pneumatic contacting and a punch for reagent chamber penetration. This segmentation allows each component to perform its specific function independently while being actuated by a single mechanical unit, thus reducing overall device complexity while maintaining reliable reagent release control through the sequential operation of these segmented functions.
2Object-affected harmful factors
If chronological sequence of coupling pneumatic interface and introducing punch is implemented, then reagent interference is prevented, but device complexity increases
Solution Approach 1:
The pneumatic interface is coupled to the cartridge first to establish pneumatic contact and prevent reagent leakage into the microfluidic system. Only after this preliminary action is completed is the punch introduced into the reagent chamber. This preliminary action of establishing pneumatic sealing before mechanical penetration prevents reagent interference while the sequential coupling sequence is achieved through the designed mechanical actuation path rather than complex control mechanisms.
3Manufacturing precision
If translatory movement is used for coupling cartridge and introducing punch, then manufacturing precision and alignment are improved, but the range of motion and structural space requirements increase
Solution Approach 1:
The pneumatic interface coupling and punch introduction functions are merged into a single translatory movement path. The mechanical actuation unit moves linearly to first establish pneumatic contact at a first position, then continues to the second position to introduce the punch into the reagent chamber. This merging of functions into one translatory motion achieves precise alignment for both operations while minimizing the total range of motion compared to separate movement mechanisms.
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
Enables efficient and precise coupling of cartridges to lab-on-a-chip analyzers, reducing manual steps and interference, while ensuring reagents are released effectively into the microfluidic system, enhancing the diagnostic process.
Implementation Method 1
a clamping unit (150) arranged adjacent to the receiving region (130) and designed to execute a first translatory movement (152) in the direction of the receiving region (130) in order to bring the pneumatic interface (120) into contact with the pneumatic port (140)
Implementation Method 2
a punch (155) for introducing into the reagent chamber (145), wherein the clamping unit (150) is designed to execute a second translatory movement (154) in the direction of the receiving region (130), subsequent to the first translatory movement (152), in order to insert the punch (155) into the reagent chamber (145)
Implementation Method 3
The cartridge can comprise a network of pneumatic and fluidic channels, which are separated from each other by a flexible membrane. The flexible membrane can be deflected, for example in response to a pneumatic pressure, and thereby move liquids in the network.
Data Source
AI summary
In a device for coupling a cartridge for a lab-on-a-chip analysis device, the cartridge has at least one pneumatic port and at least one reagent chamber. The device has a receiving region and a clamping unit. The receiving region is shaped to receive the cartridge. The clamping unit includes a pneumatic interface for pneumatically contacting the pneumatic port and a punch for insertion into the reagent chamber. The clamping unit is arranged adjacent to the receiving region and is designed to perform a first translatory motion toward the receiving region in order to bring the pneumatic interface into contact with the pneumatic port. Furthermore, the clamping unit is designed to perform a second translatory motion toward the receiving region following the first translatory motion in order to insert the punch into the reagent chamber.