Needle Safety Device With Rotating Tubes for Acoustic Feedback
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Solution Overview
Problem
Existing needle safety devices for medical injection devices often require complex assemblies with multiple parts to generate acoustic signals, leading to increased assembly effort, manufacturing costs, and susceptibility to failure, while lacking multifunctionality.
Innovation Solution
A needle safety device with a hub portion and two tubular elements that allow for relative rotation, featuring a resilient member and receiving member to generate an acoustic signal upon interaction, simplifying assembly and reducing parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple parts are used to generate acoustic signal in prior art devices, then acoustic feedback can be provided, but assembly effort and manufacturing complexity increase
Solution Approach 1:
The patent combines the acoustic signal generation function with existing structural components of the needle safety device. The resilient member (spring element) and receiving member are integrated into the tubular elements that already form part of the safety mechanism, eliminating the need for separate acoustic signal generation assemblies. This merging reduces the total number of parts while maintaining reliable acoustic feedback through the interaction between the resilient member and receiving member during normal device operation.
2Reliability
If multiple parts are used to generate acoustic signal, then acoustic feedback can be provided, but manufacturing effort and susceptibility to failure increase
Solution Approach 1:
The resilient member and receiving member serve dual functions: they are integral to the needle safety mechanism's mechanical operation while simultaneously generating the acoustic signal. This multi-functionality eliminates the need for dedicated acoustic components, reducing manufacturing steps and lowering the risk of assembly errors. The simplified structure with fewer parts inherently reduces susceptibility to failure while maintaining reliable acoustic feedback.
3Loss of information
If separate acoustic signal generation parts are used, then acoustic feedback can be provided, but the number of parts increases
Solution Approach 1:
The patent merges the acoustic signal generation function into the existing tubular elements of the needle safety device. The resilient member and receiving member are integrated components that interact during normal device operation to generate acoustic feedback, eliminating the need for separate acoustic signal generation parts. This reduces the total number of components while ensuring reliable feedback information is provided to the user.
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
Provides reliable acoustic feedback indicating activation of the safety mechanism, enhancing user safety and reducing the risk of reuse, with improved manufacturing efficiency and durability.
Implementation Method 1
the resilient member and the receiving member are configured such that upon relative rotation of the first tubular element and the second tubular element, at least a part of the resilient member is caused to hit at least a part of the receiving member, preferably a hitting portion of the receiving member, thereby generating an acoustic signal
Data Source
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AI summary
The present disclosure relates to a needle safety device (1) for a medical device, in particular for a medical injection device (100), the needle safety device (1) comprising: a hub portion (10) defining a longitudinal axis (11), wherein the hub portion (10) comprises a cannula (12) extending from the hub portion (10) substantially along the longitudinal axis (11), wherein the cannula (12) is configured to be moved along the longitudinal axis (11) relative to the hub portion (10); a first tubular element (20) being movably arranged on the hub portion (10) to move along the longitudinal axis (11); a second tubular element (30) being arranged on the first tubular element (20) such that the second tubular element (30) is movable along the longitudinal axis (11) together with the first tubular element (20), wherein the first tubular element (20) is at least partially enclosed by the second tubular element (30), wherein the second tubular element (30) comprises a contact surface (31) for establishing pressure contact with an injection area; wherein the first tubular element (20) and the second tubular element (30) are configured such that they allow for a rotation relative to each other; wherein the first tubular element (20) comprises a resilient member (60) and wherein the second tubular element (30) comprises a receiving member (70); wherein the resilient member (60) and the receiving member (70) are configured such that upon relative rotation of the first tubular element (20) and the second tubular element (30), at least a part of the resilient member (60) is caused to hit at least a part of the receiving member (70), preferably a hitting portion (72) of the receiving member (70), thereby generating an acoustic signal.