Needle Register Modular Plate Assembly for Rapid Replacement
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Solution Overview
Problem
Existing needle registers for injection devices are difficult to maintain and replace, as individual needles are fixed and require complex procedures for removal and replacement.
Innovation Solution
The needles are equipped with collars and paired perforated plates that sandwich the needles, allowing for easy removal and replacement by lifting the pair of plates as a unit, enabling quick swapping of needle units and accommodating different needle diameters through adjustable holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If individual needles are fixed in the distribution chamber, then the needle register maintains structural stability, but the replacement and maintenance of needles becomes complex and time-consuming
Solution Approach 1:
The needle register is divided into modular units: a distribution chamber, multiple perforated plates, and individual needles with collars. Each needle can be independently removed by lifting the perforated plate, allowing segmented replacement without affecting other needles. This segmentation transforms the complex individual fixation of each needle into a simple modular system where entire needle-plate units can be quickly swapped.
Solution Approach 2:
Multiple needles are merged with the perforated plate into a single removable unit. The collars on the needles engage with the perforated plate holes, creating a combined assembly where needles are collectively secured rather than individually fixed. This merging allows all needles to be replaced simultaneously as one unit, dramatically simplifying the replacement process while maintaining structural integrity.
2Productivity
If needles are individually fixed in the distribution chamber, then each needle is securely held, but the maintenance procedure requires complex steps and significant time
Solution Approach 1:
The perforated plate is pre-configured with holes positioned to receive needle collars, and the distribution chamber is designed with corresponding receptacles. This preliminary arrangement of the plate structure enables rapid needle replacement without requiring complex alignment or adjustment steps during maintenance. The pre-designed geometry allows needles to be quickly inserted and secured in their correct positions.
Solution Approach 2:
The needle register system is segmented into independently replaceable components: the distribution chamber remains stationary while the perforated plate with needles can be removed as a unit. This segmentation allows maintenance personnel to quickly extract the entire needle assembly, replace it with a new one, and restore operation without disassembling or adjusting other parts of the injection device.
3Adaptability or versatility
If multiple needles are held in the distribution chamber, then injection coverage is improved, but removal and replacement of needles becomes more difficult
Solution Approach 1:
The perforated plate serves multiple functions: it holds multiple needles simultaneously, provides a unified removal mechanism for all needles, and can be adapted to accommodate different needle arrangements by repositioning the plate or modifying hole patterns. This universal design allows the same basic structure to support various needle configurations while maintaining ease of removal through the single lifting action of the perforated plate.
Solution Approach 2:
Multiple needles are combined with the perforated plate into a single removable unit, transforming the challenge of removing multiple individually-fixed needles into a simple operation of lifting one plate. The merging of needles with the plate creates a unified assembly where all needles are secured together and can be removed simultaneously, making the process as easy as removing a single component regardless of how many needles are present.
Data Source
Figure 1~2
Figure 3~4
AI summary
The needle register comprises a needle carrier that forms a distribution chamber (16) for a liquid, and parallel hollow needles (12), which are held on the needle carrier so that their open upper ends lie in the distribution chamber. The needles comprise a collar (36) in the upper end. The distribution chamber receives pairs of stacked perforated plates (30, 38) between which the collars of the needles are held. The stacked perforated plates are: releasably held together; releasably attached to the needle carrier; and stretched with screws against the bottom of the distribution chamber. The needle register comprises a needle carrier that forms a distribution chamber (16) for a liquid, and parallel hollow needles (12), which are held on the needle carrier so that their open upper ends lie in the distribution chamber. The needles comprise a collar (36) in the upper end. The distribution chamber receives pairs of stacked perforated plates (30, 38) between which the collars of the needles are held. The stacked perforated plates are: releasably held together; releasably attached to the needle carrier; and stretched with screws against the bottom of the distribution chamber. The collars of the needles are included in a graded through holes of a lower perforated plate. The upper ends of the needles and upper surfaces of the collar are flush with an upper surface of the lower perforated plate. An upper perforated plate comprises through holes that are aligned with the upper ends of the needles and extend conically upward. Each needle penetrates an elastic seal pack, which is embedded at a bottom of the distribution chamber.