Oral Irrigator Pump Connecting Structure with Interference Sealing
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Solution Overview
Problem
Existing oral irrigator water pumps face issues such as short circuiting due to water entering electrical components and high friction leading to material and fatigue resistance challenges, particularly in piston connecting rod motion structures and diaphragm pump technologies.
Innovation Solution
A water pump connecting structure for an oral irrigator comprising a pump body, a piston ring, a connecting rod assembly, and a driving assembly, where the piston ring is in interference connection with the connecting rod assembly, guiding its reciprocating motion and enhancing sealing to prevent water from entering electrical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a piston connecting rod motion structure is used, then transmission efficiency is improved, but water may enter electrical components causing short circuit
Solution Approach 1:
The pump body is divided into a water cavity and an air cavity by a waterproof plate, with the motor located in the air cavity. This segmentation prevents water from reaching electrical components while maintaining the piston connecting rod motion structure for efficient energy transmission.
Solution Approach 2:
A waterproof plate acts as an intermediary barrier between the water cavity containing the piston and the air cavity containing the motor. This intermediary structure allows mechanical motion to be transmitted while preventing water from entering the electrical components.
2Loss of energy
If a piston connecting rod motion structure is used, then transmission efficiency is improved, but friction force increases requiring high material property and fatigue resistance
Solution Approach 1:
The patent changes the material parameter of the piston from traditional materials to PTFE (polytetrafluoroethylene), which has extremely low friction coefficients. This parameter change reduces friction force between the piston and pump body inner wall, decreasing the requirements for material strength and fatigue resistance while maintaining high transmission efficiency.
3Reliability
If diaphragm pump technology is used, then water entry into electrical components is prevented, but manufacturing consistency and quality stability decrease
Solution Approach 1:
The patent uses a piston made of PTFE material which provides uniform properties throughout the component. This homogeneous material ensures consistent manufacturing quality and stable product performance, eliminating the inter-individual differences associated with diaphragm pump manufacturing.
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 proposed solution effectively reduces the risk of short circuits and improves the sealing and guiding of the connecting rod assembly, thereby enhancing the service life and consistency of the oral irrigator.
Implementation Method 1
The piston ring is in interference connection with the connecting rod assembly
Implementation Method 2
it is necessary to reduce high-frequency friction force between the outer wall of the piston and the inner wall of the pump body
Data Source
AI summary
A water pump connecting structure for an oral irrigator, including: a pump body, a piston ring, a connecting rod assembly, and a driving assembly. The piston ring is arranged on the inner side wall of the pump body, the connecting rod assembly penetrates into the pump body and penetrates through the piston ring. The piston ring is in interference connection with the connecting rod assembly. The connecting rod assembly is connected to the driving assembly and makes reciprocating motion in the pump body through the driving of the driving assembly and the guidance of the piston ring. The connecting rod assembly and the piston ring are configured to cooperate with each other to draw liquid from a water inlet of the pump body and to pump the liquid out from a water outlet of the pump body, during reciprocating motion of the connecting rod assembly.