Resettable Medicament Training Device Drive Mechanism

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Solution Overview

Problem

Existing medicament delivery training devices are complex and costly to manufacture, making them difficult to handle and expensive to produce, which hinders their widespread use for user training.

Innovation Solution

A simplified drive mechanism for a resettable medicament delivery training device featuring a plunger rod, container, and resetting structure, where the plunger rod is biased towards the open proximal container end and can be manually reset by inserting a resetting structure, allowing for easy handling and cost-effective manufacturing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a complex resetting design with multiple internal components is used, then the device can achieve resettable functionality, but the device complexity and manufacturing cost increase

Engineering Contradiction:

Improveresettable functionalityVSAvoidinternal component structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the resetting function from complex internal mechanisms and implements it through a simple external cap that manually pushes the plunger rod back. This removes unnecessary internal components while maintaining the resettable functionality, directly resolving the contradiction between reliability and device complexity

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The plunger rod is designed to be manually reset by the user through the cap, eliminating the need for complex automated resetting mechanisms. The user performs the resetting action themselves by simply pushing the plunger rod back to its initial position, achieving resettable functionality without additional internal components

Inventive Principle:

Principle #25Self-service

2Reliability

If a complex resetting design with multiple internal components is used, then the device can achieve resettable functionality, but the manufacturing cost increases

Engineering Contradiction:

Improveresettable functionalityVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent removes complex internal resetting mechanisms and replaces them with a simple manual resetting system using the cap. This extraction of unnecessary components directly reduces manufacturing cost while preserving the essential resettable functionality

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using internal mechanisms to automatically reset the plunger, the patent inverts the approach by using an external manual action (user pushing the plunger back) to achieve resetting. This inversion eliminates complex internal components and reduces manufacturing cost

Inventive Principle:

Principle #13The other way round (Inversion)

3Device complexity

If a simplified drive mechanism is used, then the manufacturing cost decreases and ease of handling improves, but the resetting functionality must be maintained

Engineering Contradiction:

Improvedrive mechanism structureVSAvoidresetting functionality

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The simplified drive mechanism maintains resetting functionality through manual user action. The user resets the plunger rod by pushing it back to the initial position using the cap, eliminating the need for complex automated resetting mechanisms while preserving the essential functionality

Inventive Principle:

Principle #25Self-service

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 provides a user-friendly and cost-effective medicament delivery training device that simulates real medicament administration, enabling effective user training while reducing manufacturing costs.

Implementation Method 1

a plunger rod (13) having a proximal end and a distal end... in an initial state of the drive mechanism the plunger rod (13) extends through the open distal container end (11b) into the inner chamber (11a) and is axially fixedly arranged in a first position in the container (11) and biased towards the open proximal container end (11c)

Methodology Applied

Scientific EffectElastic potential energy: Spring

Data Source

PatentUS20220208024A1Drive mechanism for a resettable medicament delivery training device

Publication Date: 2022.06.30 SHL MEDICAL AG

AI summary

A drive mechanism for a resettable medicament delivery training device is presented having a plunger rod having a proximal end and a distal end, a container having an inner chamber, an open proximal container end, and an open distal container end leading into the inner chamber, and a resetting structure, wherein in an initial state of the drive mechanism the plunger rod extends through the open distal container end into the inner chamber and is axially fixedly arranged in a first position in the container and biased towards the open proximal container end, and wherein the plunger rod is configured to be released from the first position, causing the plunger rod to move towards the open proximal container end to obtain a second position in the container, wherein the resetting structure is configured to be manually inserted into the container via the open proximal container end when the plunger rod is in the second position, the resetting structure being configured to be moved manually towards the distal open end of the container to reset the plunger rod in the first position.