Dual-Fluid Dermal Syringe Injector With Flat Fusion Surface
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Solution Overview
Problem
Existing syringes for dermal regeneration face challenges in manufacturing due to sloping surfaces that complicate needle invasion and cause non-uniform shrinkage during molding, leading to defective products and requiring separate gas connection mechanisms that increase system volume and complicate distribution.
Innovation Solution
A syringe design with a sloping surface on the injector, a flat fusion surface between the injector and body, and recessed portions to prevent shrinkage, allowing easy manufacturing and mass production, featuring a check valve and oblique needle cut to facilitate fluid injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a sloping surface is formed on the injector to facilitate needle invasion, then needle invasion is easier, but the fusion surface becomes tapered causing non-uniform shrinkage and manufacturing defects
Solution Approach 1:
The injector is divided into two distinct surfaces: a sloping surface on the outer side for needle invasion facilitation, and a flat fusion surface for uniform molding. This segmentation allows each surface to fulfill its specific function without compromising the other, resolving the contradiction between ease of operation and manufacturing precision.
2Adaptability or versatility
If a separate gas connection mechanism is added for gas injection, then gas and liquid can be injected alternately, but the system volume increases and distribution becomes difficult
Solution Approach 1:
The gas injection channel and liquid injection channel are merged into a single injector body, with both channels sharing the same outer tube structure. This integration eliminates the need for separate gas connection mechanisms, maintaining versatility while reducing overall system volume for easier distribution.
Solution Approach 2:
The outer tube of the injector serves multiple functions: it forms the wall of the gas injection channel, provides structural support, and enables both gas and liquid injection capabilities. This multi-functionality reduces the number of separate components needed, thereby reducing system volume.
3Ease of manufacture
If the injector is made as a simple single-piece structure, then manufacturing is easier, but separate gas connection mechanisms are required increasing complexity
Solution Approach 1:
The injector is segmented into functional zones (gas injection channel, liquid injection channel, sloping surface, fusion surface) within a single integrated body. This allows complex functionality to be achieved through internal structural segmentation rather than multiple separate components, maintaining ease of manufacture while reducing device complexity.
Data Source
AI summary
A syringe for dermal regeneration comprises a body comprising inner and outer tubes, a cylinder filled with a first fluid being inserted into the inner tube from behind, and the outer tube being spaced apart from the inner tube and shaped to surround the inner tube such that a fillable space is formed between the inner tube and the outer tube and is filled with a second fluid; an injector coupled to the front portion of the body, the injector comprising a first part, a second part, and a third part; a through-hole formed through one side of the second part of the injector so as to communicate with the fillable space; and a check valve provided in the through-hole so as to block a flow of fluid from the injector to the fillable space and to allow a flow of fluid from the fillable space to the injector.