Insertion Device Torsion Spring Cam Mechanism
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Solution Overview
Problem
Existing insertion devices for delivering medication, such as insulin, can be traumatic for patients due to the rapid and abrupt insertion of needles, and there is a need for a system that minimizes trauma and allows for precise control over the insertion process.
Innovation Solution
An insertion system comprising a base, a first device housing with a carrier body for supporting a piercing member, and a second device housing with a drive mechanism that uses a torsion spring and cam assembly to slowly and steadily move the piercing member through the skin, allowing for adjustable settings and locking mechanisms to control the insertion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a spring mechanism is used to quickly thrust the needle through the skin, then the insertion speed is improved, but the trauma to the patient increases
Solution Approach 1:
The device transitions from a static needle position to a dynamic insertion process. The carrier body moves the needle from a retracted position through a controlled path to an extended insertion position, allowing the insertion speed and force to be dynamically adjusted rather than fixed by a spring mechanism
Solution Approach 2:
The drive mechanism allows adjustment of insertion parameters including speed, force, and depth. By changing the operational parameters of the drive mechanism, the system can optimize the balance between insertion efficiency and patient comfort, avoiding the fixed high-force spring thrust
2Object-affected harmful factors
If a manual insertion process is used to slowly insert the needle, then the patient trauma is reduced, but the insertion time increases
Solution Approach 1:
The device performs the insertion action automatically through the drive mechanism without requiring manual manipulation by the operator. The system self-regulates the insertion process, maintaining a steady controlled speed that reduces trauma while completing the insertion efficiently without human intervention
3Device complexity
If a simple spring mechanism is used for needle insertion, then the device complexity is reduced, but the control precision over insertion speed and force is worsened
Solution Approach 1:
The carrier body and drive mechanism create a dynamic system with multiple controllable parameters. The drive mechanism can be adjusted to provide different insertion speeds and forces, and the carrier body position can be controlled to achieve precise insertion depth and angle, far exceeding the fixed characteristics of a simple spring mechanism
Solution Approach 2:
The drive mechanism serves multiple functions: it controls insertion speed, insertion force, insertion depth, and can potentially accommodate different needle types. This multi-functionality is achieved through a single integrated mechanism rather than requiring separate mechanisms for each function
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 system provides a less traumatic and more controlled insertion of piercing members, ensuring accurate placement and minimizing discomfort for patients, while allowing for the use of different types of piercing members and facilitating easy reuse of components.
Implementation Method 1
a drive mechanism that uses a torsion spring and cam assembly to slowly and steadily move the piercing member through the skin
Implementation Method 2
a drive mechanism that uses a torsion spring and cam assembly to slowly and steadily move the piercing member through the skin
Data Source
AI summary
An actuation device includes a lancing device held by and moveable relative to a distal end portion of a housing. A drive member is supported by the housing and arranged to engage the lancing device to move the lancing device in the first direction from a retracted position to an extended position upon movement of the drive member in a first direction. A piercing member of the lancing device is arranged to extend from the distal end portion of the housing by a first distance when the lancing device is moved to the extended position, the first distance being adjustable by adjusting the retracted position of the lancing device relative to the distal end portion of the housing.