Ampoule-Fixing Holder with Elastic Ring for Intraosseous Injection
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Solution Overview
Problem
Conventional ampoule holders for intraosseous anesthetic solution injection devices face challenges in manufacturing due to non-uniform inner and outer diameters, leading to high manufacturing costs and potential deformation, which affects the ampoule-fixing force and stability, especially with varying ampoule sizes and surface properties.
Innovation Solution
An ampoule-fixing holder with a cylindrical body, an elastic rubber ring fixing member, and a rotary body that includes protruding portions and slits to securely hold the ampoule, ensuring consistent rotational force transmission and accommodating different ampoule diameters, while the elastic rubber ring maintains the fixing force over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If bridges are formed in the holder to reduce inner diameter for ampoule fixing, then the fixing force is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The holder is divided into multiple circumferential positions with alternating bridge structures and open spaces. This segmentation allows the holder to fix the ampoule at multiple discrete points around its circumference, providing sufficient fixing force while avoiding the complexity of a completely solid bridge structure that would be difficult to manufacture.
2Reliability
If bridges are formed in the holder to fix the ampoule, then the fixing capability is improved, but the manufacturing time and cost increase
Solution Approach 1:
The bridge structures are designed as thin, flexible elements that can be easily formed during manufacturing. These thin film-like bridges provide sufficient fixing capability while being simple to manufacture, thereby improving productivity without compromising ampoule fixing reliability.
3Force
If the holder has non-uniform inner diameter due to bridges, then the ampoule can be fixed, but the manufacturing precision and consistency decrease
Solution Approach 1:
The holder deliberately employs asymmetric design with alternating bridge and open-space positions around the circumference. This asymmetric pattern creates the necessary inner diameter variations for ampoule fixing while maintaining rotational symmetry in the overall structure, allowing for consistent manufacturing through standardized bridge formulations at each position.
4Force
If bridges deflect inwardly to fix the ampoule, then the fixing force is improved, but the holder deformation over time increases
Solution Approach 1:
The bridge structures are pre-formed with built-in elastic bias during manufacturing, so they are already positioned to exert the necessary fixing force on the ampoule from the start. This preliminary action eliminates the need for significant deflection during operation, reducing stress on the holder structure and preventing deformation over time.
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 solution effectively reduces manufacturing time and costs, prevents rotational slippage, and maintains consistent fixing force despite ampoule diameter variations and potential holder deformation, ensuring reliable power transmission and ampoule stability during dental procedures.
Implementation Method 1
a fixing member configured to firmly hold the ampoule inserted into the holder body to effectively transmit rotational force to the ampoule
Data Source
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AI summary
Disclosed are an ampoule-fixing holder for an intraosseous anesthetic solution injection device and an anesthetic solution injection device including the same. The ampoule-fixing holder includes a cylindrical holder body including an open portion formed at the rear end thereof to allow an ampoule containing an anesthetic solution to be inserted thereinto or removed therefrom, a head configured to enable mounting of an injection needle to the front end of the holder body, a rotary body disposed between the head and the holder body to withstand rotational force and an axial load, and a fixing member configured to firmly hold the ampoule inserted into the holder body to effectively transmit rotational force to the ampoule.