Needleless Syringe With Staged Pressing for Continuous Multi-Dose Injection
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Solution Overview
Problem
Conventional needleless syringes administer liquid medicine in a one-shot method, requiring multiple ampoule replacements and spring compressions, which is cumbersome and inefficient for administering small amounts to multiple locations.
Innovation Solution
A needleless syringe design with a tubular casing, piston, gas supply, valve mechanism, and pressing member with multiple stages, allowing continuous liquid injection through gas pressure and simple lever operations to switch pressing surfaces and release gas, eliminating the need for ampoule replacement and spring compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the one-shot method is used to administer liquid medicine, then the injection can be completed quickly, but multiple ampoules must be replaced and spring compression must be repeated for multi-location administration
Solution Approach 1:
The pressing member is divided into multiple pressing surfaces (first pressing surface, second pressing surface, etc.) arranged at different axial positions, allowing the plunger to be pressed in stages. This segmentation enables continuous administration of liquid medicine in multiple doses without replacing the ampoule, resolving the contradiction between quick injection and operational simplicity for multi-location administration.
Solution Approach 2:
The pressing member is designed to be movable in the axial direction, allowing it to reciprocate between different pressing surfaces. This dynamic structure enables the system to switch between different pressing depths, facilitating continuous multi-dose administration from a single ampoule while maintaining the speed advantage of the one-shot method.
2Quantity of substance
If multiple ampoules are prepared for multi-location administration, then the required dosage can be provided, but ampoule replacement and spring compression must be repeated
Solution Approach 1:
The pressing member with multiple pressing surfaces serves multiple functions: it can press the plunger to different depths using different pressing surfaces, enabling both single-dose and multi-dose administration from a single ampoule. This multi-functionality eliminates the need for multiple ampoules and repeated spring compressions, reducing operational complexity while maintaining dosage flexibility.
Solution Approach 2:
The pressing member can continuously press the plunger in stages using different pressing surfaces without requiring ampoule replacement. This continuous action allows liquid medicine to be administered in multiple doses from a single continuous operation, eliminating the interruption and complexity associated with replacing multiple ampoules.
3Ease of operation
If a single ampoule is used for continuous administration, then ampoule replacement is eliminated, but a mechanism to control staged pressing is required
Solution Approach 1:
The pressing member is segmented into multiple pressing surfaces at different axial positions, each corresponding to a specific pressing depth. This segmentation provides a simple mechanical solution for controlling staged pressing without requiring complex control mechanisms, achieving operation continuity while maintaining device simplicity.
Solution Approach 2:
The pressing member automatically reciprocates between different pressing surfaces through its own elastic deformation and mechanical structure, without requiring external control mechanisms. The system serves itself by using the elastic properties of the pressing member to achieve staged pressing, minimizing additional device complexity while enabling continuous multi-dose administration.
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 continuous administration of fixed liquid doses with a simple operation, improving convenience and efficiency by automating the injection process without the need for repeated ampoule changes or spring compressions.
Implementation Method 1
a gas supply portion (14) that is provided behind the piston (10) at the rear end of the casing (8) and supplies gas (12) that moves the piston (10) toward the tip of the casing (8)
Data Source
AI summary
A needleless syringe that may administer a fixed amount of liquid in multiple doses in a continuous manner including a plunger and a piston for pushing out the liquid from a liquid container are provided in a cylinder. Gas introduced in a gas supply part may flow into an airtight space by the opening operation of a valve mechanism linked to the pushing of an upper second operating lever, and a piston may move and push a pressing member. When the liquid injection based on a certain stroke is completed, the gas in the airtight space may be released outside a casing by a gas release mechanism. The piston and the pressing member may move back, and the pressing member, which has multiple pressing surfaces with different axial positions, may be rotated by a pressing surface change mechanism to change the pressing surface.