Pump Housing Conductor Sealing With an Auxiliary Gap Filler
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Solution Overview
Problem
Existing fluid control devices face challenges in reliably sealing cavities through which external connection conductors protrude due to gaps formed by different height positions, leading to inadequate sealing of the housing.
Innovation Solution
The fluid control device incorporates an auxiliary member positioned to overlap and narrow the gap between the second external connection conductor and the housing, ensuring the adhesive is effectively filled in the cavity, thereby enhancing the sealing of the external connection conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two external connection conductors are drawn from different positions in the height direction, then the electrical connection is achieved, but the gap between the conductor and housing increases making sealing difficult
Solution Approach 1:
An auxiliary member is introduced as an intermediary component between the housing and the second external connection conductor. This auxiliary member fills the height-direction gap created by the conductor's position, enabling the adhesive to effectively seal the cavity while maintaining electrical connectivity.
Solution Approach 2:
The sealing function is segmented into two parts: the housing provides the primary seal, and the auxiliary member provides additional sealing support in the height direction. This segmentation allows each component to address specific sealing challenges independently.
2Reliability
If adhesive is applied to seal the cavity, then the housing密封性 is improved, but the adhesive may not reliably fill wide gaps formed by height differences
Solution Approach 1:
The auxiliary member acts as a mediator that creates a more uniform gap structure, allowing the adhesive to be evenly distributed and effectively fill the sealing space without being compromised by large height variations.
Solution Approach 2:
The auxiliary member extends in the width direction to bridge the height-direction gap, transforming a three-dimensional sealing challenge into a more manageable two-dimensional sealing surface that the adhesive can effectively cover.
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
This configuration allows for more reliable sealing of the cavities, maintaining a stable and hermetic state within the housing, ensuring efficient fluid control operations.
Implementation Method 1
a pump body including a piezoelectric element
Implementation Method 2
an adhesive fixing the housing and a portion of the pump body and sealing the inside of the housing against an outside
Data Source
AI summary
A fluid control device includes a pump body, a housing, and an adhesive. The pump body includes a first external connection conductor and a second external connection conductor. The housing includes a side wall, accommodates the pump body in an inside of the housing, and has a first cavity and a second cavity extending through the side wall. The adhesive fixes the housing and a portion of the pump body and seals the inside of the housing against an outside. The first external connection conductor protrudes outside the housing through the first cavity, and the second external connection conductor protrudes outside the housing through the second cavity. The fluid control device includes an auxiliary member different from the adhesive.