Needle Output Buffer Mechanism for Syringe Barrel Impact Protection
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Solution Overview
Problem
Conventional syringes lack an impact protection mechanism, leading to damage of the barrel due to strong forces during needle ejection, especially when the barrel is made of glass.
Innovation Solution
A needle output buffer mechanism is integrated into the syringe, comprising a buffer member with elastic arms that absorb impact forces during needle ejection, providing buffering elasticity to the barrel group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the injection propulsion device provides enough ejection force to drive the barrel group to eject the needle, then the needle can pierce into the subcutaneous muscle effectively, but the barrel may be damaged due to strong impact force during ejection
Solution Approach 1:
The patent introduces a buffer member with elastic arms that are pre-installed in the syringe to cushion the barrel group during needle ejection. The elastic arms deform elastically to absorb impact forces, preventing barrel damage while maintaining effective ejection force. This beforehand cushioning mechanism resolves the contradiction by protecting the barrel before impact occurs.
Solution Approach 2:
The buffer member acts as an intermediary between the injection propulsion device and the barrel group. The elastic arms of the buffer member mediate the impact forces, absorbing and dissipating the strong impact forces that would otherwise damage the barrel. This intermediary mechanism allows the propulsion device to provide sufficient ejection force while protecting the barrel from damage.
2Productivity
If the barrel group is ejected with strong impact force to ensure needle piercing, then injection effectiveness is improved, but the glass barrel and connection structure are easily damaged
Solution Approach 1:
The buffer member with elastic arms is pre-installed to cushion the barrel group during ejection. The elastic deformation of the arms absorbs impact forces, ensuring the barrel survives the strong impact forces needed for effective needle piercing while maintaining durability. This beforehand cushioning protects the glass barrel and connection structure from damage.
Solution Approach 2:
The patent converts the harmful impact forces into beneficial elastic deformation energy. The elastic arms deform elastically to absorb the impact forces that would otherwise damage the barrel, and then return to their original shape to maintain the ejection force. This converts the harmful impact into a protective mechanism that ensures both injection effectiveness and barrel durability.
3Device complexity
If no impact protection mechanism is provided to keep the structure simple, then device complexity is reduced, but the barrel is easily damaged due to strong impact force
Solution Approach 1:
The buffer member consists of elastic arms that function as flexible elements. These elastic arms deform elastically to absorb impact forces, providing protection to the barrel without requiring a complex rigid protection structure. The flexible elastic arms offer a simple yet effective solution that maintains structure simplicity while enhancing barrel strength.
Solution Approach 2:
The buffer member serves as a simple intermediary mechanism between the propulsion device and the barrel. The elastic arms provide impact protection through their flexibility, adding minimal structural complexity while significantly improving barrel durability. This intermediary approach balances simplicity and protection effectively.
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
The buffer mechanism prevents barrel damage by absorbing impact forces, ensuring smooth needle ejection and injection while allowing for automatic needle retraction after use.
Implementation Method 1
the buffer member providing buffering elasticity to the barrel group that is ejected to output the needle through elastic contact of the elastic arm in the syringe
Implementation Method 2
the elastic arms of the buffer member resiliently collide in the syringe to absorb impact force
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A needle output buffer mechanism (B) and a syringe comprising the needle output buffer mechanism (B). The syringe comprises the needle output buffer mechanism (B) and an injection propulsion mechanism (C), and is capable of mounting a barrel group (A). The needle output buffer mechanism (B) is connected to a barrel (10) of the barrel group (A) by means of a buffer member (20) with an elastic arm (202). The needle output buffer mechanism (B) can link with the barrel group (A), which is ejected by the injection propulsion mechanism (C), and produces elastic collision in the syringe by utilizing the elastic arm (202) of the buffer member (20) so as to absorb an impact force, thereby providing a buffer protection performance for the ejected barrel group (A) and ensuring that the barrel group (A) is prevented from being damaged due to an extremely large impact force during ejection.