Punching Device Sealed Drive Housing for Dust Contamination
Solution Overview
Problem
Punching devices for processing dried samples, such as DNA-containing liquids, suffer from dust particle contamination, which leads to frequent maintenance needs due to dust deposition on components like the star-shaped rotation unit.
Innovation Solution
A sealed housing with a mounting plate covers the drive unit, creating a structural separation between the drive and punching means, and using magnetic coupling for precise positioning of the transport frame, which prevents dust from reaching the drive unit and allows easy cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the drive unit is exposed to the punching area, then the transport frame can be easily positioned, but dust particles contaminate the drive unit requiring frequent maintenance
Solution Approach 1:
The device is divided into two separate sections: an open punching area where dust is generated, and a sealed housing containing the drive unit. The sealed housing acts as an independent compartment that protects the drive unit from dust contamination while allowing the transport frame to be positioned in the open punching area. This segmentation resolves the contradiction by isolating the drive unit from harmful dust particles.
Solution Approach 2:
A receiving plate serves as an intermediary component between the sealed housing and the open punching area. The drive unit operates within the sealed housing, while the receiving plate extends into the open area to support the transport frame. This intermediary structure allows the drive unit to remain protected while still enabling positioning operations in the dust-generating area.
2Object-affected harmful factors
If the drive unit is sealed in a housing, then dust contamination is reduced, but access for maintenance becomes more difficult
Solution Approach 1:
The housing is designed with a movable or removable section that allows dynamic access to the drive unit. During normal operation, the housing remains sealed to protect against dust. During maintenance, the housing can be opened or a panel removed, allowing easy access to the drive unit components. This dynamic design resolves the contradiction by providing both protection during operation and access during maintenance.
3Measurement precision
If the transport frame is moved in the open area, then positioning is precise, but dust particles are generated and settle on components
Solution Approach 1:
The drive unit is extracted from the open punching area and placed inside a sealed housing. This extraction removes the sensitive drive unit components from the dust-generating environment while allowing the transport frame to continue operating in the open area with precise positioning. The harmful dust particles are effectively separated from the drive unit through this extraction.
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
This design significantly reduces contamination of the drive unit by dust particles, minimizing maintenance requirements and ensuring the reliability of the punching device.
Implementation Method 1
A punching device with receiving plate (210) forms a cover of a sealed housing for a drive unit (230), by which a transport frame (214) resting on the receiving plate (210) is moved in the plane of the plate (210) relative to the punching means (110)
Implementation Method 2
using magnetic coupling for precise positioning of the transport frame
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to a punching device for processing samples, in particular dried samples, applied to a sample card, preferably liquids containing DNA, such as blood, saliva and the like, comprising at least one punching means with a punch and a lower die, the punch being movable between a resting position at a distance from the lower die and a punching position closer to the lower die. The punching means has a receiving opening into which a sample card can be introduced by means of a movable gripping unit of the punching device and can be positioned in relation to the punching means, and a punching drive, which can be coupled or is coupled to the punch of the punching means and which drives the movement of the punch between the resting position and the punching position, the punching means being designed in such a way that a piece of sample punched out from the sample card can be discharged at an outlet opening of the lower die into a receiving recess of a receiving container (12) arranged underneath the punching means. According to the invention, the punching device has a receiving plate (210), which forms a cover of an outwardly sealed housing (220) for a drive unit (230), by which a transport frame (214) resting on the receiving plate (210) is moved in relation to the punching means (110) in the plane of the plate.