Medical Needle Curved Buffer Mechanism
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Solution Overview
Problem
Conventional medical needles with strong spring repulsion mechanisms cause discomfort due to collision noise when housing the needle tip, leading to user discomfort.
Innovation Solution
A medical needle design featuring a movement mechanism with an elastic member and a curved portion that reduces impact and noise by buffering the contact between the needle and case, allowing secure housing of the needle tip while minimizing user discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring with relatively strong repulsion is used as a spring member to securely house the needle tip, then the needle tip can be securely housed in the case, but the needle or connection part bumps into the inner surface of the case causing strong impact and collision noise
Solution Approach 1:
The patent introduces a cushioning member (elastic member) that is pre-positioned between the needle assembly and the case inner surface. This cushioning member compresses during the housing process to absorb impact energy before the needle can contact the hard case surface, thereby eliminating collision noise while maintaining secure housing capability
Solution Approach 2:
The cushioning member acts as an intermediary element between the moving needle assembly and the stationary case. This intermediate component transfers and dampens the impact force through its elastic deformation, preventing direct contact between the needle and case surfaces that would generate noise
2Reliability
If a spring with relatively strong repulsion is used as a spring member, then the needle tip can be securely housed in the case, but this causes rather strong impact giving users a discomfort feeling
Solution Approach 1:
The cushioning member is pre-installed in the case to provide impact absorption before the needle housing action occurs. The elastic member compresses during the housing process, converting kinetic energy into elastic potential energy and then dissipating it, thereby reducing the impact sensation perceived by the user while maintaining reliable needle containment
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 medical needle effectively reduces user discomfort and collision noise even with strong spring repulsion, ensuring secure needle tip housing through the use of a curved buffer mechanism.
Implementation Method 1
a movement mechanism including an elastic member which is located in the case and configured to move the needle portion from a first position at which the needle tip protrudes from the case by a predetermined length to a second position at which the needle tip is housed in the case
Implementation Method 2
a curved portion which is provided in at least one of facing portions and which curves upon contact with the case, the movement mechanism or the needle portion
Data Source
AI summary
Provided is a medical needle that reduces a user's discomfort feeling while securely housing a needle tip into a case. Medical needle 1 includes needle portion 10 including needle tip 14 at the head thereof; case 30 configured to be capable of exposing needle portion 10 from the head thereof and housing the needle portion; movement mechanism 50 including spring member 60, which is located in case 30, configured to move needle portion 10 from a first position at which needle tip 14 protrudes from case 30 by a predetermined length to a second position at which needle tip 14 is housed in case 30; and curved portion 90 provided in a portion which is in movement mechanism 50 and faces case 30.