Rotation Analysis Cartridge Locking Hook for Heat and Centrifugal Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rotation-based analysis cartridges face issues with attachments becoming loose due to high rotation speeds and temperature exposure, leading to potential detachment and instability during PCR thermocycling.
Innovation Solution
A cartridge design featuring a locking hook mechanism with a U-shaped bent middle section and angled legs, which experiences compressive stress and bending, enhancing the locking effect and preventing detachment under centrifugal forces and thermal expansion, while maintaining high temperature homogeneity in chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional locking attachments are used in rotation-based cartridges, then the structure is simple and easy to manufacture, but the attachments become loose due to high rotation speeds and temperature exposure
Solution Approach 1:
The locking hook is designed with elastic material properties and a flexible geometry featuring a U-shaped bent middle section that allows dynamic adaptation. The hook can elastically deform under centrifugal forces and thermal expansion, maintaining continuous contact and locking pressure throughout the rotation and heating cycles, preventing detachment while accommodating dynamic operational conditions.
Solution Approach 2:
The locking mechanism utilizes changes in material properties under different operational parameters. The elastic material of the locking hook changes its deformation characteristics under varying temperatures and centrifugal forces, allowing it to maintain effective locking engagement throughout the thermocycling and rotation process despite parameter variations.
2Productivity
If the cartridge is rotated at high speeds for analysis, then productivity increases, but centrifugal forces cause attachments to become loose
Solution Approach 1:
The locking hook's elastic design allows it to dynamically respond to centrifugal forces generated during high-speed rotation. The flexible U-shaped middle section enables the hook to deform and maintain engagement under the dynamic loading conditions of rapid rotation, ensuring attachment stability throughout the high-speed analysis process.
Solution Approach 2:
The elastic material and flexible geometry of the locking hook provide built-in cushioning capacity before detachment can occur. The hook can absorb and accommodate the forces generated during high-speed rotation through elastic deformation, preventing sudden failure or detachment even under extreme centrifugal loading conditions.
3Productivity
If temperature is increased for PCR thermocycling, then DNA amplification efficiency improves, but thermal expansion causes attachments to become loose
Solution Approach 1:
The locking mechanism is designed to accommodate parameter changes during thermocycling. The elastic material of the locking hook responds to thermal expansion by deforming elastically, maintaining locking engagement despite temperature-induced dimensional changes in the cartridge components throughout the PCR amplification process.
Solution Approach 2:
The flexible U-shaped middle section of the locking hook provides dynamic adaptation to thermal expansion. As temperatures increase during DNA amplification, the hook can deform to accommodate the expanding components while maintaining continuous locking pressure, ensuring attachment stability throughout the thermocycling process.
4Reliability
If a secure locking mechanism is implemented, then attachment stability improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The locking hook is implemented as a thin, flexible elastic component with a simple geometric form featuring a U-shaped bent middle section. This flexible element can be manufactured using standard molding or forming processes for elastic materials, achieving secure locking functionality without complex multi-part assemblies or precision machining, thus maintaining ease of manufacture while ensuring attachment stability.
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 design ensures stable attachment and improved temperature control, preventing unintended detachment and achieving temperature uniformity within chambers, enhancing the reliability and efficiency of PCR thermocycling.
Implementation Method 1
The locking hook (22) is made of an elastic material and has a geometry that, in an unloaded state, corresponds to a configuration in which the locking surface (60) is engaged with the locking shoulder (62)... the locking hook experiences compressive stress and possibly also bending... a deformation counteracting a loosening of the connection is advantageously enabled
Implementation Method 2
Even when loaded in the surface direction of the base body and in particular also of the cover body, a deformation counteracting a loosening of the connection is advantageously enabled. Such a load can occur, for example, due to different thermal expansions of the cover body and the base body
Implementation Method 3
The cartridge, which is usually shaped like a disc, is rotated... due to the sometimes high rotation speed... leading to potential detachment and instability during PCR thermocycling
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a cartridge (1) for a rotation-based analysis method. The cartridge (1) has a main part (2), which extends in a planar manner and in which a channel and chamber structure (4) is formed, and a cover body (18), which is secured to the main part (2) and is arranged on a main part (2) upper face (20) facing away from a heat input side (12) and which covers a chamber (6, 40) of the main part (2). The main part (2) and/or the cover body (18) has a number of holding openings (24), and the cover body (18) or the main part (2) has a number of latching hooks (22), each of which is paired with one of the optionally multiple holding openings (24), wherein a foot limb (50) of the latching hook (22) protrudes from the cover body (18) or the main part (2) in the direction of the main part (2) or the cover body (18), and the foot limb (50) transitions into a central part (52) which is bent in a U-shaped manner and which transitions into a free limb (54) that is oriented back in the direction of the cover body (18) or the main part (2) and terminates with a free end (56). The latching hook (22) or each latching hook has a projection (58) with a latching surface (60) on the free end-side, said latching surface being oriented in the direction of the free end (56). The central part (52), which is bent in a U-shaped manner, of the latching hook (22) or of each latching hook engages through the paired holding opening (24), thereby forming a latching connection.