Automatic Injection Applicator with Linear Motor Control

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Solution Overview

Problem

Current drug administration methods, particularly in anesthesiology, face challenges due to manual handling of needles, which can cause discomfort and tissue damage from rapid fluid injection, as they require manual control of needle penetration and anesthetic flow, lacking automated control over penetration force and speed to manage tissue resistance effectively.

Innovation Solution

An automatic injection applicator with an electronic module that controls a motor for cartridge compression and a suction chamber, allowing gradual needle penetration and anesthetic release, featuring a vibrating mechanism to reduce pain, and programmable force/speed to overcome tissue resistance, enabling controlled and comfortable drug delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual needle handling and anesthetic injection is performed, then the professional can control the injection process, but the needle penetration and fluid release cause tissue damage and patient discomfort due to uncontrolled force and speed

Engineering Contradiction:

Improvemanual control of injection processVSAvoidtissue damage and patient discomfort

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the manual mechanical injection system with an automated electronic system. A motor-driven plunger mechanism controlled by an electronic module automates the anesthetic delivery process, precisely controlling injection speed and force to prevent tissue damage while eliminating manual handling risks

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent implements precise control over injection parameters including flow rate, injection speed, and pressure. The electronic module regulates these parameters to maintain optimal injection conditions, preventing excessive force and speed that cause tissue damage while ensuring effective anesthetic delivery

Inventive Principle:

Principle #35Parameter changes

2Productivity

If rapid anesthetic injection is performed to overcome tissue resistance, then the injection can be completed quickly, but high tissue pressure causes tissue damage and patient pain

Engineering Contradiction:

Improveinjection speedVSAvoidtissue damage and patient pain

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a dynamic injection system that automatically adjusts injection speed and pressure in real-time. The motor-driven plunger mechanism varies the injection rate according to tissue resistance feedback, maintaining optimal pressure levels throughout the injection process to prevent tissue damage while ensuring complete anesthetic delivery

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates feedback control mechanisms that monitor injection progress and tissue resistance. The electronic module receives information about injection conditions and automatically adjusts plunger speed and force accordingly, preventing excessive pressure buildup that causes pain and tissue damage

Inventive Principle:

Principle #23Feedback

3Object-affected harmful factors

If slow anesthetic injection is performed to reduce tissue pressure, then patient comfort is improved, but the injection process takes longer time

Engineering Contradiction:

Improvetissue damage and patient discomfortVSAvoidinjection duration

Core Design Contradiction:

Object-affected harmful factorsVSLoss of time

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system maintains continuous, controlled anesthetic delivery through the motor-driven plunger mechanism. Rather than intermittent or manual injection, the automated system provides steady, uninterrupted flow at optimized rates, achieving both patient comfort and efficient injection completion

Inventive Principle:

Principle #20Continuity of useful action

4Measurement precision

If automated motor control is implemented for cartridge compression and needle exposure, then injection precision and patient comfort are improved, but device complexity increases

Engineering Contradiction:

Improveinjection control precisionVSAvoidelectronic module and motor system

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent integrates multiple functions into a unified automated system. The electronic module controls both the plunger compression and needle exposure mechanisms, coordinating these functions to achieve precise injection delivery while reducing the need for separate manual control systems

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system incorporates automatic coordination between different components. The electronic module autonomously manages the sequencing of needle exposure, anesthetic delivery, and plunger retraction without requiring manual intervention, simplifying the user interface while maintaining precise control

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 controlled, comfortable, and repeatable injection process by automating needle penetration and anesthetic flow, reducing patient discomfort and tissue damage through programmed force and speed control, while allowing additional features like mucosal suction and vibration for enhanced application.

Implementation Method 1

an actuating means equipped with a computer program promotes the activation of a first linear motor which compresses axially said cartridge

Methodology Applied

Scientific EffectLinear motor: Linear Motor

Implementation Method 2

a second linear motor which displaces said suction chamber to expose said needle for the injection

Methodology Applied

Scientific EffectLinear motor: Linear Motor

Implementation Method 3

with a vibration mechanism to reduce pain

Methodology Applied

Scientific EffectVibration: Vibration

Data Source

PatentUS10328206B2Automatic injection applicator

Publication Date: 2019.06.25 LIMA AUGUSTO DARWIN MOREIRA DE ARAUJO

AI summary

An automatic applicator of injection is described, which is equipped with a programmable electronic module that activates a first linear motor (ML1) which axially displaces an arm (13) of the proximal end (11) to the fixed head (20) placed at the distal end of the housing (10), said arm (13) which compresses a cartridge (15) fitted in the chamber (12) formed between the head (20) and the free end of the arm (13) so as to gradually expel the fluid stored in the cartridge; and a second linear motor (ML2) actuated concurrent with the first linear motor (ML1), said second linear motor (ML2) retreating an arm (60) with a dragger (61) which slides axially a suction chamber (30) toward the intermediate portion of the housing (10) and contiguous to the outer surface of the inner chamber (12), gradually exposing the needle tip (50) for application of the injection. The equipment is also equipped with a motor (63) which vibrates the suction chamber (30), tightly sealed, inside which air is removed by a suction pump creating a vacuum for the suction of the mucous against the needle.