Oral irrigator

1. An oral irrigator comprising: a body, a water tank and a detachable jet tip which are both in connection with the body, a power device and a control device which are both accommodated in the body; the power device is configured to deliver water from the water tank to the detachable jet tip; wherein the power device includes a first outlet defined thereon and configured to discharge the water, a delivery tube connecting with the first outlet, and a first seal element configured to stop water flowing into the body from the power device so that the water discharges out of the first outlet;

wherein the first seal element is a conically stepped washer having multiple diameters; and

wherein the water tank has a mouth formed on a top of the water tank and has at least one retaining protrusion separately arranged around a rim of the mouth of the water tank, a bottom cap has a fixing portion arranged on a bottom thereof and matching with the mouth of the water tank, wherein the fixing portion of the bottom cap has at least one recess configured to retain with the at least one retaining protrusion of the mouth of the water tank.

2. The oral irrigator as claimed in claim 1 wherein a sixth O ring is secured to the top of the water tank at the mouth of the water tank.

3. The oral irrigator as claimed in claim 2 , wherein an area of the mouth of the water tank is over ½ of the top of the water tank.

4. The oral irrigator as claimed in claim 1 , wherein an area of the mouth of the water tank is over ½ of the top of the water tank.

5. The oral irrigator as claimed in claim 3 , wherein the water tank has an inlet formed on a peripheral side thereof and has a lid on which a fifth O ring is fitted.

6. The oral irrigator as claimed in claim 4 , wherein the water tank has an inlet formed on a peripheral side thereof and has a lid on which a fifth O ring is fitted.

7. The oral irrigator as claimed in claim 1 , wherein a fitting tube has a holder mounted on a top thereof, the detachable jet tip has a positioning loop secured on a distal end thereof, the holder has a fastener disposed thereon, and the affix loop is fixed on the fastener, a button is accommodated on a top cap, wherein as the button is pushed, the button pushes an affix loop to deform increasingly, and the positioning loop is released so as to remove the detachable jet tip from the body, a seventh O ring is defined between the holder and the fastener.

8. The oral irrigator as claimed in claim 1 , wherein a fitting tube has a holder mounted on a top thereof; the detachable jet tip has a positioning loop secured on a distal end thereof, the holder has a fastener disposed thereon, and the affix loop is fixed on the fastener, a button is accommodated on a top cap, wherein as the button is pushed, the button pushes an affix loop to deform increasingly, and the positioning loop is released so as to remove the detachable jet tip from the body, a seventh O ring is defined between the holder and the fastener.

9. The oral irrigator as claimed in claim 5 , wherein a button has a hook formed on a distal end thereof and fitted with a returning spring.

10. The oral irrigator as claimed in claim 6 , wherein a button has a hook formed on a distal end thereof and fitted with a returning spring.

11. An oral irrigator comprising:

a body, a water tank and a detachable jet tip which are both in connection with the body, a power device and a control device which are both accommodated in the body; the power device is configured to deliver water from the water tank to the detachable jet tip; wherein the power device includes a first outlet defined thereon and configured to discharge the water, a delivery tube connecting with the first outlet, and a first seal element configured to stop water flowing into the body from the power device so that the water discharges out of the first outlet;

wherein the body also has a bottom cap fixed on a bottom thereof and connecting with the water tank; and

wherein the water tank has a mouth formed on a top of the water tank and has at least one retaining protrusion separately arranged around a rim of the mouth of the water tank, the bottom cap has a fixing portion arranged on a bottom thereof and matching with the mouth of the water tank, wherein the fixing portion of the bottom cap has at least one recess configured to retain with the at least one retaining protrusion of the mouth of the water tank.

12. An oral irrigator comprising:

a body, a water tank and a detachable jet tip which are both in connection with the body, a power device and a control device which are both accommodated in the body; the power device is configured to deliver water from the water tank to the detachable jet tip; wherein the power device includes a first outlet defined thereon and configured to discharge the water, a delivery tube connecting with the first outlet, and a first seal element configured to stop water flowing into the body from the power device so that the water discharges out of the first outlet;

wherein the power device includes a motor, a drive gear, a reduction gear, a pump, a connection rod, and a piston; the drive gear meshes with the motor, the reduction gear meshes with a first end of the connection rod, and a second end of the connection rod couples with the piston, wherein the piston is movably housed in the pump and is driven by the connection rod so as to move upward and downward relative to the pump, a first end of the first seal element is fitted on the connection rod, and a second end of the first seal element is connected to the pump;

wherein the body also has a bottom cap fixed on a bottom thereof and connecting with the water tank; and

wherein the water tank has a mouth formed on a top of the water tank and has at least one retaining protrusion separately arranged around a rim of the mouth of the water tank, the bottom cap has a fixing portion arranged on a bottom thereof and matching with the mouth of the water tank, wherein the fixing portion of the bottom cap has at least one recess configured to retain with the at least one retaining protrusion of the mouth of the water tank.

13. An oral irrigator comprising:

a body, a water tank and a detachable jet tip which are both in connection with the body, a power device and a control device which are both accommodated in the body; the power device is configured to deliver water from the water tank to the detachable jet tip; wherein the power device includes a first outlet defined thereon and configured to discharge the water, a delivery tube connecting with the first outlet, and a first seal element configured to stop water flowing into the body from the power device so that the water discharges out of the first outlet;

wherein the body also has a bottom cap fixed on a bottom thereof and connecting with the water tank; and

wherein a fitting tube has a holder mounted on a top thereof, the detachable jet tip has a positioning loop secured on a distal end thereof, the holder has a fastener disposed thereon, and the affix loop is fixed on the fastener, a button is accommodated on a top cap, wherein as the button is pushed, the button pushes an affix loop to deform increasingly, and the positioning loop is released so as to remove the detachable jet tip from the body, a seventh O ring is defined between the holder and the fastener.

14. An oral irrigator comprising:

a body, a water tank and a detachable jet tip which are both in connection with the body, a power device and a control device which are both accommodated in the body; the power device is configured to deliver water from the water tank to the detachable jet tip; wherein the power device includes a first outlet defined thereon and configured to discharge the water, a delivery tube connecting with the first outlet, and a first seal element configured to stop water flowing into the body from the power device so that the water discharges out of the first outlet;

wherein the power device includes a motor, a drive gear, a reduction gear, a pump, a connection rod, and a piston; the drive gear meshes with the motor, the reduction gear meshes with a first end of the connection rod, and a second end of the connection rod couples with the piston, wherein the piston is movably housed in the pump and is driven by the connection rod so as to move upward and downward relative to the pump, a first end of the first seal element is fitted on the connection rod, and a second end of the first seal element is connected to the pump;

wherein the body also has a bottom cap fixed on a bottom thereof and connecting with the water tank; and

a fitting tube has a holder mounted on a top thereof; the detachable jet tip has a positioning loop secured on a distal end thereof, the holder has a fastener disposed thereon, and the affix loop is fixed on the fastener, a button is accommodated on a top cap, wherein as the button is pushed, the button pushes an affix loop to deform increasingly, and the positioning loop is released so as to remove the detachable jet tip from the body, a seventh O ring is defined between the holder and the fastener.