Spring-Damped Injection Mechanism for Quieter Syringe Actuation
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Solution Overview
Problem
Existing injection devices using powerful helical springs create excessive noise and vibrations during operation, which can be unsettling for users.
Innovation Solution
Incorporation of damping elements made of resilient or viscous materials within the drive springs to absorb and dissipate the vibrations, reducing noise transmission to other structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If powerful helical springs are used to drive the plunger, then the injection device can deliver the required motive force, but excessive noise and vibrations are generated
Solution Approach 1:
A damping element made of resilient or viscous material is introduced as an intermediary between the drive spring and the plunger driver. This damping element absorbs and dissipates the vibrations generated by the powerful helical spring, reducing noise transmission to other structures while maintaining the spring's driving force capability
Solution Approach 2:
The vibration and noise generated by the drive spring are converted into beneficial damping effects. The resilient or viscous material of the damping element transforms the harmful vibrational energy into heat through internal friction, thereby reducing noise while preserving the spring's motive force function
2Object-generated harmful factors
If damping elements are added to reduce vibrations, then noise is reduced, but device complexity increases
Solution Approach 1:
The damping element is implemented as a flexible component made of resilient or viscous material that can be integrated within the existing drive mechanism. This flexible damping element effectively reduces noise while adding minimal structural complexity to the injection device
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
Effectively dampens both transverse and longitudinal vibrations, minimizing noise and user discomfort while maintaining the functionality of the injection device.
Implementation Method 1
one or more damping elements of a resilient material for contacting the or each drive spring to thereby damp vibrations of the spring or springs following release
Implementation Method 2
damping elements of a resilient material
Implementation Method 3
One or more of the drive springs are at least partially coated in a viscous material which damp vibrations of the spring or springs following their release
Data Source
AI summary
An injection device comprising: a main body for receiving a syringe containing a medicament: and a drive mechanism within the main body and having a plunger driver movable through the main body. the drive mechanism comprising one or more drive springs that can be primed and released to move the plunger driver, the drive mechanism further comprising one or more damping elements of a resilient material for contacting the or each drive spring and thereby damp vibrations of the spring or springs following release.