Injector Piston Nest With Segmented Cylindrical Housing
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Solution Overview
Problem
Conventional packaging methods for injector pistons lead to contamination and surface flaws during transportation and assembly, requiring complex alignment and increasing the risk of foreign substance contamination.
Innovation Solution
A container with multiple cylindrical housing portions on a base material, featuring expanded inner surfaces to securely hold and protect pistons, allowing for easy assembly and sterilization without external aligners, and compatible with other injector components for streamlined production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple pistons are packed together in a sterilizing bag for transportation, then packaging efficiency is improved, but fine particles and outside flaws are generated on the piston surface due to vibration and mutual friction
Solution Approach 1:
The packaging container is divided into multiple independent housing portions, each capable of individually accommodating a single piston. This segmentation prevents pistons from contacting each other during transportation, eliminating surface flaws caused by mutual friction while maintaining packaging efficiency through bulk handling of multiple separated pistons.
Solution Approach 2:
Multiple independent housing portions are integrated within a single packaging container structure, creating a nested arrangement where individual piston housing cavities are contained within the outer packaging. This allows efficient bulk packaging while maintaining physical separation of pistons to prevent contamination.
2Manufacturing precision
If an aligner is used to keep components in the same direction during assembly, then assembly alignment is improved, but workability decreases and foreign substance contamination increases
Solution Approach 1:
The housing portions are pre-formed with cylindrical cavities that inherently guide piston insertion and maintain proper orientation during the packaging process. This preliminary alignment structure eliminates the need for separate aligner tools during assembly, reducing complexity while maintaining precision.
Solution Approach 2:
The cylindrical housing portions act as an intermediary structure between the piston and the final assembly, providing a guided pathway that ensures proper orientation and alignment during insertion into the injection cylinder, thereby eliminating the need for additional aligning tools.
3Volume of stationary object
If pistons are packed in bulk without individual housing, then packaging space utilization is improved, but contamination and foreign substance introduction occur during handling
Solution Approach 1:
The packaging container is segmented into multiple independent housing portions, each accommodating a single piston in isolation. This prevents foreign substance contamination while maintaining efficient space utilization through the integrated multi-cavity structure that allows bulk handling of separately protected pistons.
Data Source
AI summary
A container for receiving or storing or carrying pistons for injectors, the container having a base plate and hollow cylindrical piston storage parts (the container being hereafter referred to as a piston nest). Each of the hollow cylindrical piston receiving parts is formed either by making it vertically penetrate through the basic plate, with one side of the base plate functioning as one opening end, and project from the other side or by making it vertically penetrate through the base plate and project from both sides of the base plate. Preferably, each piston receiving part has a swelled part where a part of the inner peripheral wall surface of the piston receiving part is swelled inward. The pistons for injectors are received in the piston receiving parts.