Piezoelectric Pump Signal Transmission Layer Nesting

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Solution Overview

Problem

Conventional piezoelectric pumps have a large and vulnerable multi-layer circuit structure for signal transmission, which is prone to damage and increases the overall volume of the device.

Innovation Solution

A fluid driving device design where the signal transmission layer, piezoelectric element, and plane unit are stacked on one side of the vibration unit, with a flexible printed circuit board and a frame structure that integrates the signal transmission layer inside the device, reducing the overall thickness and protecting the signal transmission layer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the signal transmission layer is located outside the pump body, then the circuit structure can be simpler to manufacture, but the overall volume increases and the structure becomes easily damaged

Engineering Contradiction:

Improvecircuit structure manufacturingVSAvoidsignal transmission layer protection

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The signal transmission layer is nested inside the pump body, specifically integrated into the diaphragm structure. The circuit board is positioned within the housing and connected to the diaphragm, protecting it from external damage while maintaining electrical connection for actuating the piezoelectric elements.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The signal transmission layer is transitioned from an external planar arrangement to an integrated three-dimensional structure within the pump body. By incorporating the circuit board into the diaphragm assembly and positioning it within the housing, the design utilizes internal space to achieve both protection and compactness.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the multi-layer circuit structure is used outside the pump body, then the electrical connection can be more flexible, but the overall volume becomes large

Engineering Contradiction:

Improvecircuit connection flexibilityVSAvoiddevice overall volume

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The signal transmission layer is merged with the diaphragm structure, eliminating the need for separate external circuit boards and connectors. The circuit board is integrated into the housing and directly connected to the piezoelectric elements, reducing overall volume while maintaining electrical functionality.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The circuit board and signal transmission components are nested within the pump housing and diaphragm assembly, utilizing the internal space of the pump body to accommodate electrical connections without increasing external dimensions.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Ease of manufacture

If the signal transmission layer is placed outside the pump body, then the assembly process can be simpler, but the structure is more vulnerable to damage

Engineering Contradiction:

Improveassembly simplicityVSAvoidsignal transmission layer durability

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The signal transmission layer is nested within the protective housing and diaphragm structure, shielding it from external mechanical damage, chemical exposure, and environmental factors while maintaining assembly simplicity through integrated construction.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The housing and diaphragm structure serve as protective barriers that cushion and protect the signal transmission layer from potential damage before it can occur, ensuring durability without complicating the assembly process.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 design enhances protection of the signal transmission layer, reduces the device's overall thickness, and simplifies assembly, while maintaining efficient fluid handling capabilities.

Implementation Method 1

can deform a piezoelectric vibrator only by an inverse piezoelectric effect of piezoelectric ceramics

Methodology Applied

Scientific EffectInverse piezoelectric effect: Piezoelectric Effect

Data Source

PatentUS11585337B2Fluid driving device

Publication Date: 2023.02.21 KOGE MICRO TECH CO LTD

AI summary

A fluid driving device includes a vibration unit, a signal transmission layer, a piezoelectric element, and a plane unit. The signal transmission layer includes a first conductive zone and a second conductive zone. The piezoelectric element includes a first electrode and a second electrode electrically isolated from each other. The first electrode of the piezoelectric element is electrically connected to the first conductive zone of the signal transmission layer, and the second electrode of the piezoelectric element is electrically connected to the second conductive zone of the signal transmission layer. The plane unit has at least one hole. The signal transmission layer, the piezoelectric element, and the plane unit are located at one side of the vibration unit and sequentially stacked with each other.