Motor-Driven Syringe Piston Control Device

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Solution Overview

Problem

Manipulation of syringes with varying volumes (30-60 ml) requires significant strength, leading to potential injuries and increased time, especially in sterile environments, due to the repetitive and demanding nature of syringe operations.

Innovation Solution

A handheld device with a mechanical driver and electronic controller module that allows for controlled displacement of the syringe piston, featuring a finger flange retainer, thumb rest retainer, and a motor-driven mechanism to facilitate precise and efficient operation, accommodating syringes of various diameters and enabling both inward and outward movements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual manipulation of syringes is performed, then operator control and flexibility are maintained, but operator strain and risk of injury increase due to required hand and wrist strength

Engineering Contradiction:

Improveease of syringe manipulationVSAvoidoperator injury risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A mechanical driver system acts as an intermediary between the operator and the syringe piston. The driver engages with the piston thumb rest and provides mechanical assistance for both retraction and thrust movements, reducing the direct manual force required while maintaining operator control over the syringe operation

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces pure manual mechanical manipulation with an assisted mechanical system. The driver mechanism, powered by a motor, substitutes for direct hand and wrist strength, eliminating the need for operator muscles to generate the forces required for syringe manipulation while preserving operational precision

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If manual syringe manipulation is performed, then operational flexibility is maintained, but preparation time increases due to repetitive demanding operations

Engineering Contradiction:

Improvesyringe preparation speedVSAvoidmedicine preparation time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The motor-driven mechanical driver system replaces manual syringe manipulation, dramatically reducing the time required for piston retraction and thrust operations. The automated mechanical system performs repetitive movements faster and more consistently than manual operation, directly addressing the time loss in medicine preparation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The driver mechanism is pre-positioned and engaged with the syringe piston before operation begins. The system is ready to immediately perform retraction and thrust movements without requiring manual setup or positioning, reducing preparation time through advance mechanical preparation

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If a mechanical driver system is introduced to assist syringe manipulation, then operator strain is reduced, but device complexity increases

Engineering Contradiction:

Improveease of syringe manipulationVSAvoidcontrol system complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The mechanical driver system is designed to perform multiple functions: it can retract the piston, thrust the piston, and accommodate different syringe sizes through adjustable engagement mechanisms. This multi-functionality reduces the need for multiple separate devices, managing complexity while providing comprehensive assistance

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The driver mechanism is designed with nested components where the engagement means can be adjusted and stored within the housing structure. The mechanical driver nests within the syringe holder assembly, reducing overall device footprint and managing structural complexity through space-efficient design

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS8403888B2Device and electronic controller for syringe piston control

Publication Date: 2013.03.26 TENEO INNOVATIONS

AI summary

A device for controlling displacement of a syringe piston comprises a handheld casing, first and second engagement means. The first engagement means is formed exteriorly of the casing to engage the syringe's finger flange. The second engagement means slides on a first axis relative to the casing and engages the thumb rest. The device comprises means within the casing to cause the second engagement means to move along the first axis, causing the piston to move outwardly. An electronic controller module for controlling outward movement of the piston comprises an input/output port and a processor module. The processor module determines a prescribed movement speed and sends a motor command via the port at an initial motor speed. The motor causes the outward movement. The port receives speed measurements. The processor module attempts to match the measurements to a prescribed speed by sending successive motor commands via the port.