Pistol Dispenser with Needle Direction Control for Fat Grafting
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Solution Overview
Problem
Current fat grafting devices lack precision in injecting small volumes of fat, often resulting in complications such as absorption, infection, and uneven distribution, which are exacerbated by the inability to control injection direction and mix additives like stem cells and growth factors effectively.
Innovation Solution
A dispenser device with a pistol housing, needle direction control mechanism, boost mechanism, and quantification control mechanism that allows for precise control of injection volume between 1/10 and 1/300 cc, simultaneous injection of multiple agents, and adjustable injection direction, ensuring airtight operation and even distribution of contents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional fat grafting devices are used, then the injection process is simple, but the injection volume precision is poor and cannot control small volumes accurately
Solution Approach 1:
The device divides the syringe into multiple segmented chambers (first syringe and second syringe) that can be independently controlled. Each chamber can be precisely dosed separately through individual plunger mechanisms, enabling accurate control of small injection volumes while maintaining a manageable device structure through modular design.
2Adaptability or versatility
If multiple agents are injected simultaneously, then the treatment effectiveness is improved, but the device complexity increases
Solution Approach 1:
The device merges multiple syringes and their respective plunger mechanisms into a single integrated injection system. The first syringe and second syringe are positioned adjacent to each other with their needles aligned, allowing simultaneous injection of multiple agents through a unified delivery mechanism while maintaining individual control over each agent's dosage.
Solution Approach 2:
The device is designed with universal functionality to handle different types of agents (fat, stem cells, growth factors) in any combination. The modular syringe configuration and common injection pathway allow the same device structure to perform multiple injection functions without requiring device changes.
3Adaptability or versatility
If the injection direction is fixed, then the device structure is simple, but the ability to adjust injection angles is limited
Solution Approach 1:
The device incorporates a dynamic needle positioning system where the needle assembly can be rotated and adjusted to different angles relative to the syringe body. This dynamic adjustment capability allows the injection direction to be changed as needed while maintaining a relatively simple overall device structure through flexible mechanical connections.
Data Source
AI summary
A dispenser device comprising a pistol housing, a needle direction control mechanism, a boost mechanism, a quantification control mechanism, and a combination of the pistol housing, the needle direction control mechanism, the boost mechanism, and a syringe positioning mechanism or a holding ring embodies the present invention with features and advantages shown as follows, (1) Uniform injection of agents synchronously mixed by not less than two contents; (2) Mixed agents not exposed in air; (3) Uniform injection, high air tightness, injection direction controlled by easy turning, smooth and convenient operation, high powerful operation via shifts of a push rod driven by a pressed trigger, promoted yield rate, assembly easily constructed, reduced manufacture cost, and convenient maintenance.