Piston pump drive assembly for a cleaning care appliance
By combining electromagnetic drive and resonator, the problems of sealing failure, water pulse number fluctuation and high noise in the existing water flosser piston pump drive assembly are solved, and the stability of piston movement and the improvement of cleaning effect are achieved.
CN116498520BActive Publication Date: 2026-07-17SHANGHAI SHIFT ELECTRIC CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI SHIFT ELECTRIC CO LTD
- Filing Date
- 2022-03-21
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing water flossers have problems such as easy fatigue and yielding of seals, water pulse count varying with battery voltage, and high noise levels, which affect cleaning performance.
Method used
The reciprocating motion of the piston is driven by an electromagnetic drive device and an elastic element. The efficient reciprocating motion of the piston is achieved by using non-contact electromagnetic force between the magnet and the coil. By matching the natural frequency of the resonator with the current frequency, the number of water pulses is kept constant, thus reducing noise.
Benefits of technology
This achieves smooth piston movement and stable water pulse count, reduces noise, and improves cleaning effect and mechanical efficiency.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN116498520B_ABST
Abstract
A piston pump drive assembly for a cleaning appliance is disclosed. The drive assembly comprises a piston cylinder and a piston. The piston has a head seal portion movably sealing against an inner wall surface of the piston cylinder, a head cavity having a liquid inlet and a liquid outlet. The piston pump drive assembly further comprises an electromagnetic drive and at least one elastic element. The electromagnetic drive comprises a coil and a magnet. The coil is fixed relative to the piston cylinder and the magnet is located in the cavity and fixedly attached to the piston. The elastic element is arranged between the piston cylinder and the piston such that the elastic element is able to exert an elastic force on the piston during movement of the piston. The elastic force is substantially parallel to a longitudinal direction.
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