Rotatable Needle Sleeve Axial Movement Injector
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Solution Overview
Problem
Cartridge injection devices face challenges in efficiently combining a sealed medicament reservoir with a needle for injection, requiring manual or complex automated processes to establish fluid communication, which can be cumbersome and prone to user error.
Innovation Solution
An injector device with a rotatable needle sleeve that moves the needle unit or cartridge axially to establish fluid communication with the medicament reservoir, featuring a mechanism where rotation of the sleeve engages or disengages the needle unit and/or cartridge to facilitate needle insertion and subsequent medicament delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual processes are used to combine the sealed cartridge with the needle, then device complexity is reduced, but ease of operation deteriorates due to cumbersome steps and user error
Solution Approach 1:
The cartridge and needle are pre-assembled in a sealed configuration within the device housing, with the needle positioned but not yet connected to the cartridge. This preliminary arrangement eliminates the need for manual assembly steps during use, as the components are already prepared and positioned for automatic connection upon activation.
Solution Approach 2:
The device employs a dynamic connection mechanism where the needle and cartridge transition from a separated, sealed state to a connected, fluid-communicating state through automated movement. The needle can be moved axially to pierce the cartridge seal, and the connection can be dynamically established or disconnected based on operational requirements, improving ease of use while managing complexity through controlled motion.
2Ease of operation
If automated processes are used to establish fluid communication, then ease of operation improves, but device complexity increases
Solution Approach 1:
The cartridge and needle are pre-assembled in a sealed configuration within the device housing, with the needle positioned but not yet connected to the cartridge. This preliminary arrangement eliminates the need for manual assembly steps during use, as the components are already prepared and positioned for automatic connection upon activation.
Solution Approach 2:
The device employs a dynamic connection mechanism where the needle and cartridge transition from a separated, sealed state to a connected, fluid-communicating state through automated movement. The needle can be moved axially to pierce the cartridge seal, and the connection can be dynamically established or disconnected based on operational requirements, improving ease of use while managing complexity through controlled motion.
3Reliability
If the needle is initially separated from the cartridge, then reliability is improved by preventing premature contact, but device complexity increases due to additional mechanisms required to combine them
Solution Approach 1:
The cartridge and needle are pre-assembled in a sealed configuration within the device housing, with the needle positioned but not yet connected to the cartridge. This preliminary arrangement eliminates the need for manual assembly steps during use, as the components are already prepared and positioned for automatic connection upon activation.
Solution Approach 2:
The device employs a dynamic connection mechanism where the needle and cartridge transition from a separated, sealed state to a connected, fluid-communicating state through automated movement. The needle can be moved axially to pierce the cartridge seal, and the connection can be dynamically established or disconnected based on operational requirements, improving ease of use while managing complexity through controlled motion.
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
This design simplifies the process of establishing fluid communication between the needle and medicament reservoir, enhancing user safety and efficiency by automating the needle insertion and medicament delivery, reducing the complexity of manual operations and potential user errors.
Implementation Method 1
a needle sleeve rotatably mounted to the housing about an axis
Implementation Method 2
the engagement member being adapted such that rotation of the needle sleeve moves the needle unit and/or the cartridge in an axial direction
Data Source
AI summary
The present disclosure relates to an injector device having a housing, a cartridge with a reservoir for medicament, a needle unit with a needle, and a needle sleeve rotatably mounted to the housing about an axis. Prior to use of the injector device the needle is sealed from the reservoir, and at least one of the needle unit and the cartridge is axially slidably mounted to the housing. The needle sleeve includes an engagement member arranged to engage the needle unit and/or the cartridge. The engagement member is adapted such that rotation of the needle sleeve moves the needle unit and/or the cartridge in an axial direction to move the needle into fluid communication with the reservoir.