Needleless Syringe Skin-Suction Injection Depth Control
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Solution Overview
Problem
Needleless syringes without injection needles face challenges in delivering medicaments efficiently to shallow regions of the body, such as the area containing Langerhans cells, due to complex structures and the need for auxiliary machines to maintain a vacuum state, which complicates the device and reduces convenience.
Innovation Solution
A needleless syringe design featuring a pressurizing unit, a discharge unit with a nozzle having a smaller open end than the flow passage area, and a minute pore unit with a flow passage area smaller than the nozzle, allowing for precise control of injection depth by adjusting the flow diameter of the injection substance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the interior of the syringe is formed to be in the vacuum state to press the skin against the discharge port, then the injection solution can be delivered to the intended area, but the structure of the syringe becomes stout and complex and auxiliary machines are required
Solution Approach 1:
The invention extracts the vacuum generation function from the syringe system by using the patient's own skin suction capability. The skin's natural negative pressure when pressed against the discharge port replaces the need for mechanical vacuum pumps, eliminating complex auxiliary machines while maintaining reliable injection delivery to the intended area.
Solution Approach 2:
The syringe design enables self-service by utilizing the patient's skin to generate the necessary vacuum effect. When the skin is pressed against the discharge port, it naturally creates negative pressure that draws the injection solution into the skin, eliminating the need for external vacuum generation equipment and simplifying the overall device structure.
2Manufacturing precision
If the flow diameter of the injection substance is not controlled, then the injection substance may penetrate too deeply into the living body, but controlling the flow diameter requires complex nozzle structures
Solution Approach 1:
The invention applies local quality by creating a specific localized structure at the discharge port with a narrowed flow diameter section. This localized narrowing controls the flow diameter of the injection substance precisely where it exits the syringe, ensuring shallow penetration into the skin without requiring complex internal nozzle structures throughout the entire syringe.
Solution Approach 2:
The invention changes the flow diameter parameter at the discharge port by providing a narrowed section. This parameter change directly controls the injection depth by limiting the flow diameter of the discharged substance, achieving precise depth control through a simple geometric modification rather than complex nozzle mechanisms.
3Ease of operation
If a vacuum state is maintained in the syringe, then shallow intradermal injection can be achieved, but auxiliary machines such as pumps are required which diminish convenience
Solution Approach 1:
The syringe design enables self-service by utilizing the patient's skin to generate the necessary vacuum effect. When the skin is pressed against the discharge port, it naturally creates negative pressure that draws the injection solution into the skin, eliminating the need for external vacuum generation equipment and simplifying the overall device structure.
Solution Approach 2:
The invention extracts the vacuum generation function from the syringe system by using the patient's own skin suction capability. The skin's natural negative pressure when pressed against the discharge port replaces the need for mechanical vacuum pumps, eliminating complex auxiliary machines while maintaining reliable injection delivery to the intended area.
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 efficient and shallow injection into the target area without the need for complex structures or auxiliary machines, ensuring precise delivery and minimizing waste, while allowing various forms of the injection substance, including liquids, gels, and powders.
Implementation Method 1
a pressurizing unit which pressurizes the injection objective substance enclosed in the enclosing unit
Implementation Method 2
a minute pore unit which includes a minute pore having a flow passage area smaller than the area of the open end of the discharge unit and which is arranged on an outer side of the open end so that the injection objective substance discharged from the open end passes through the minute pore
Data Source
AI summary
A needleless syringe comprises an enclosing unit for an injection objective substance, a pressurizing unit for the injection objective substance, a discharge unit having a flow passage for allowing the injection objective substance to flow therethrough so that the injection objective substance is discharged from an open end of the flow passage to an injection target area, the open end being formed so that an area thereof is smaller than a flow passage area of the enclosing unit, and a minute pore unit including a minute pore having a flow passage area smaller than the area of the open end of the discharge unit and which is arranged on an outer side of the open end so that the injection objective substance discharged from the open end passes through the minute pore and arrives at a side of the injection target area.