CPC F04B 53/143 (2013.01) [A61C 17/028 (2013.01); F04B 53/144 (2013.01); F04B 53/162 (2013.01)] | 13 Claims |
1. A pumping assembly, comprising:
a cylinder, provided therein with at least two chambers with different inner diameters;
a piston mechanism, comprising a piston head and a separation groove provided on a sidewall of the piston head, wherein the piston head comprises a mating end and a connecting end that are successively extending through the at least two chambers, the mating end is in sealing cooperation with a wall of a chamber with a smaller inner diameter of the at least two chambers, and a gap being formed between a sidewall of the connecting end and a wall of a chamber with a larger inner diameter of the at least two chambers, the separation groove is provided with a bottom wall and a sidewall connected to the bottom wall;
the sidewall is arranged obliquely relative to the bottom wall, and a depth of the separation groove is ⅛ to ½ of a width of the separation groove; and
a drive mechanism connected to the piston mechanism, the drive mechanism being configured to drive the piston mechanism to move;
wherein a side of the mating end away from the drive mechanism is provided with an accommodating groove, and a wall of the accommodating groove is elastic.
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6. A piston pump, comprising:
a pumping assembly, comprising:
a cylinder, provided therein with at least two chambers with different inner diameters;
a piston mechanism, comprising a piston head and a separation groove provided on a sidewall of the piston head, wherein the piston head comprises a mating end and a connecting end that are successively extending through the at least two chambers, the mating end is in sealing cooperation with a wall of a chamber with a smaller inner diameter of the at least two chambers, and a gap being formed between a sidewall of the connecting end and a wall of a chamber with a larger inner diameter of the at least two chambers, the separation groove is provided with a bottom wall and a sidewall connected to the bottom wall;
the sidewall is arranged obliquely relative to the bottom wall, and a depth of the separation groove is ⅛ to ½ of a width of the separation groove; and
a drive mechanism connected to the piston mechanism, the drive mechanism being configured to drive the piston mechanism to move;
wherein a side of the mating end away from the drive mechanism is provided with an accommodating groove, and a wall of the accommodating groove is elastic.
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11. A water flosser, comprising:
a pumping assembly, comprising:
a cylinder, provided therein with at least two chambers with different inner diameters;
a piston mechanism, comprising a piston head and a separation groove provided on a sidewall of the piston head, wherein the piston head comprises a mating end and a connecting end that are successively extending through the at least two chambers, the mating end is in sealing cooperation with a wall of a chamber with a smaller inner diameter of the at least two chambers, and a gap being formed between a sidewall of the connecting end and a wall of a chamber with a larger inner diameter of the at least two chambers, the separation groove is provided with a bottom wall and a sidewall connected to the bottom wall;
the sidewall is arranged obliquely relative to the bottom wall, and a depth of the separation groove is ⅛ to ½ of a width of the separation groove; and
a drive mechanism connected to the piston mechanism, the drive mechanism being configured to drive the piston mechanism to move;
wherein a side of the mating end away from the drive mechanism is provided with an accommodating groove, and a wall of the accommodating groove is elastic.
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