JPS6136261Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction hose in a dental suction device.

In dental suction devices, the suction hose that connects the mouthpiece for sucking up oral waste (saliva, cuttings, bleeding, etc.) or the hand-held suction cup for spit removal and mouth washing to the suction device is flexible. gender,
In addition, it is made of a metal bellows tube to withstand decompression below atmospheric pressure, and a conduit for passing pilot air and mouthwash water is inserted inside the tube. However, as is well known, bellows pipes have unevenness on both the inside and outside.
The outer surface impairs the operability of the tube, and the uneven inner surface has the drawback of impeding the flow of substances flowing through the tube and causing filth to stagnate in the recesses.

In view of the above, the present invention is a suction hose having a smooth pipe and a plurality of holes formed in the peripheral wall of the pipe parallel to the pipe axis.

Fig. 1 schematically shows a suction device for operating a hand-held saliva mouthwash cup; in the figure, 1 and 2 indicate pressurized air and mouthwash water supplies, respectively; 3 and 4 indicate air and water supplies; Control valves are shown respectively. These control valves are partitioned by a diaphragm 5, on which side pilot air (shown in thin lines) acts, and on the other side, pressurized air (shown in thick lines) acts on the control valve 3.
In the control valves 4, the water supplies shown in bold lines act respectively. The pilot air shown by the thin line is branched from the pressurized air shown by the thick line at a branch point 6, passes through control valves 3 and 4, and then joins at 7.
The pressurized air that has passed through the control valve 3 is supplied to the suction device 8, and a reduced pressure section is created within the device by the action of the ejector. The water supply via the control valve 4, the pilot air at the confluence point 7, and the decompression section of the suction device 8 are communicated through a suction hose 9 to a hand-held cup 10 attached to its end.

FIG. 2 shows a cross section of the joint 11 (FIG. 1) between the suction hose 9 and the cup 10. In the same figure, 12 is a cup-handling part, 13 is an upper part thereof, 1
4 is the lower part, 15 is the cup, 16 is the strainer, 1
7 is the fountain pipe, 18 is the bottom of the cup and the lower part of the handle 14
19 is a spool valve, 20 is a nipple communicating with the valve, 21 is a nipple to the fountain pipe, 22 and 23 are the bottom opening 2 of the lower hand portion 14
4, nipples 20 and 22 are connected by flexible tubes 25,
Further, the nipples 21 and 23 are connected by another flexible tube 26, respectively. The end 28 of the suction hose 9 is tightly attached to the lower part 14 of the hand-holding part by means of a socket 27, and the holes 29, 30 in the circumferential wall of the hose are fitted tightly.
The nipples 22 and 23 are inserted into the holes, respectively.

FIG. 3 shows a conventional suction hose made of a bellows tube in a partially cutaway view. The wall of the tube is made of metal 31 and has irregularities on both the inside and outside surfaces, and conduits 32 and 33 through which pilot air, mouthwash water, etc. are to be passed are inserted inside. On the contrary, what is shown in FIG. 4 as a partially cut-away partial view is a part of the suction hose 9 according to the invention. This hose is made of a cylindrical tube with smooth inner and outer surfaces, and a plurality of holes 34, 35, 36 parallel to the tube axis are formed at intervals in the circumferential wall of the tube. These holes correspond to the holes 29, 30 previously described in FIG. 2 and replace the conduits 32, 33 of FIG.

The suction hose 9 leads to the suction device 8 in the suction device, and the air that has left the pilot air confluence point 7 goes to a hole 29 in the hose tube wall, and the water that has left the control valve 4 goes to another hole 30. They flow inside the hose tube wall up to the joint 11. The air then goes to the spool valve 19 via the nipple 22, conduit 25 and nipple 20, and the water goes to the fountain pipe 17 via the nipple 23, conduit 26 and nipple 21, respectively, as long as the spool valve 19 is closed. The pilot air acts as back pressure on each diaphragm 5 of the control valves 3 and 4, and the valve 3 shuts off the pressurized air and the control valve 4 shuts off the water supply, so the suction action of the suction device 8 also acts on the fountain pipe 16. The fountains have also been shut down.
Next, when the spool valve 19 is opened, the back pressure disappears, allowing the passage of pressurized air and water through the valves 3 and 4, and the suction device 8 is activated to start suction at the cup 10 through the hose 9. And fountain pipe 1
The fountain 4 was also started, and the saliva in the cup was sucked into the hose together with the mouthwash water through the hole 18.
It is sucked toward the suction device 8.

As mentioned above, the suction hose according to the present invention is smooth on both the inside and outside surfaces and has no irregularities, making it easy to operate. Since there is no concave part where water stagnates, and there is no insertion object such as a conduit inside the hose, it has excellent communication properties and is suitable for a dental suction device. In addition, in the suction hose of the present invention, a through hole for transmitting pilot air and mouthwash water from the suction device to the suction port is provided in the hose tube wall so as to be parallel to the tube axis. The length is the same as the overall length of the hose, so there is less resistance to fluid flow and faster transmission, the overall weight of the hose can be reduced, and the smooth outer surface of the hose provides excellent operability.

[Brief explanation of drawings]

FIG. 1 schematically shows a vacuum suction device for operating a mouthwash cup, and FIG. 2 shows a cross-section of the joint between the mouthwash cup and the suction hose in FIG.
FIG. 3 shows a conventional suction hose in a partially cutaway view, and FIG. 4 shows a partially cutaway view of a suction hose according to the present invention. In the figure, 8...Suction device, 9...Suction hose, 10...
...Mouthwash cup, 29, 30, 34, 35, 36...
...a hole in the hose pipe wall.

Claims (1)

[Scope of utility model registration request] In a dental suction device, the suction hose used to connect the mouthpiece for sucking up oral waste or the hand-held mouthwash cup to the suction device is made into a smooth tube with smooth inside and outside surfaces, and there is a tube parallel to the tube axis within the circumferential wall of the tube. A suction hose for a dental suction device, characterized in that a plurality of holes are arranged and formed at intervals, and the holes are used for the passage of pilot air for operating the suction device and water supply for mouth washing. .