CN103417305A

CN103417305A - Dental handpiece

Info

Publication number: CN103417305A
Application number: CN2013103650191A
Authority: CN
Inventors: 宋晖
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-08-21
Filing date: 2013-08-21
Publication date: 2013-12-04
Anticipated expiration: 2033-08-21
Also published as: CN103417305B

Abstract

The invention discloses a dental handpiece comprising a head and a body. The tail end of the body is provided with an air inlet, an air outlet and a water inlet. The tail end of the body is further provided with an air-inlet pipe connector comprising an outer casing, a check valve, a first connecting pipe, a pressure maintaining valve and a second connecting pipe. The check valve, the first connecting pipe, the pressure maintaining valve and the second connecting pipe are all in sequential series connection into a connecting-pipe component which is arranged in the outer casing and connected with the inner wall of the outer casing, the outer casing is connected with the tail end of the body in a sleeved manner, one end, away from the first connecting pipe, of the check valve is connected with the air inlet of the body, and the second connecting pipe, the air outlet and the water inlet all extend out of the outer casing. According to the design that the air inlet connector is internally provided with the check valve used for controlling backflow and preventing waste liquid from flowing back to an inlet pipe and the pressure maintaining valve, stability of air supply pressure can be guaranteed and operating performance of the dental handpiece is enabled to be stable.

Description

A kind of dental handpiece

Technical field

The present invention relates to a kind of dental care equipment, particularly a kind of dental handpiece.

Background technology

Chinese utility model patent CN2008201878206 discloses a kind of disposable piece with button for changing needle high-speed dental handpiece, its rotor shaft is arranged in head shell by two bearings, wind wheel is arranged on rotor shaft, rotor shaft stretches out outside head shell, for thimble is installed, be provided with air inlet and gas outlet in wind wheel chamber in head shell, the front end of fuselage is provided with spray holes, the tail end of fuselage is provided with intake interface, give vent to anger interface and water inlet interface, air inlet communicates with intake interface, gas outlet communicates with the interface of giving vent to anger, and spray holes communicates with the water inlet interface.During use, tap into trachea on intake interface, on the interface of giving vent to anger, pick out trachea, on the water inlet interface, tap into water pipe.During work, thereby the air inlet pipe air inlet is blown the wind wheel rotation and is driven the thimble rotation, while stopping, air inlet pipe stops air feed, and wind wheel just can stop because inertia also will rotate certain hour, in head shell, can produce negative pressure, waste liquid in oral cavity is sucked to the wind wheel chamber from thimble, enter the indoor fraction waste liquid of wind wheel and enter gas outlet, generally also to not the interface of giving vent to anger, on not impact of escape pipe.Due to air inlet pipe cut air feed, also can produce negative pressure in air inlet pipe, enter the indoor most of waste liquid of wind wheel and can be inhaled into air inlet pipe, polluted air inlet pipe, because air inlet pipe reuses, therefore, can cause interpatient cross infection.

Summary of the invention

The problem to be solved in the present invention is: a kind of dental handpiece of avoiding oral cavity waste liquor contamination air inlet pipe is provided.

For addressing the above problem, the present invention includes head and fuselage, the tail end of fuselage is provided with intake interface, give vent to anger interface and the water inlet interface, the tail end of described fuselage also is provided with the air inlet pipe joint, the air inlet pipe joint comprises trocar sheath, check valve, first takes over, pressure maintaining valve and second is taken over, check valve, first takes over, pressure maintaining valve and the second adapter are serially connected in the adapter assembly successively, taking over assembly is arranged in trocar sheath, taking over assembly is connected with the inwall of trocar sheath, trocar sheath is connected with the tail end socket of fuselage, an end away from the first adapter on check valve is connected with the intake interface on fuselage, second takes over, the interface of giving vent to anger all stretches out outside trocar sheath with the water inlet interface.

For the ease of the air inlet pipe joint, with fuselage, dock, described first takes over upper cover has movable locating ring, locating ring to be fixed on the inwall of trocar sheath, and the maximum rotating diameter of check valve and the maximum rotating diameter of pressure maintaining valve all are greater than the interior ring diameter of locating ring.

In order to make air inlet pipe joint and fuselage docking operation convenient, the outer wall of described fuselage tail end is provided with two overhanging boss, the port be connected with fuselage on described trocar sheath is provided with the gear platform of stretching in two, one of them gear platform is provided with the limiting plate vertical with this gear platform, two gear platforms of trocar sheath are hung on two boss of fuselage tail end, and one of them boss is against on limiting plate.

Beneficial effect of the present invention: the present invention is owing to being designed with the air inlet pipe joint, be provided with in the air inlet pipe joint and control the check valve refluxed, can prevent that waste reflux from arriving air inlet pipe, and in the air inlet pipe joint, pressure maintaining valve is installed, can guarantee that supply gas pressure is stable, make the stable work in work of dental handpiece.Not, air inlet pipe joint and fuselage split design, only have the link of check valve and intake interface that pollution is arranged in the air inlet pipe joint, and sterilization is convenient, the air inlet pipe joint can be pulled down to sterilization, can reuse.Only have the disposable use of head and fuselage sections, thereby provide cost savings.

The accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is that trocar sheath of the present invention is cut the schematic diagram under state open;

Fig. 3 is the structural representation that the present invention removes the air inlet pipe joint;

Fig. 4 is the structural representation enlarged drawing (trocar sheath is cut open) of air inlet pipe joint;

Fig. 5 is the enlarged drawing of overlooking of trocar sheath;

In figure: 1, head, 2, fuselage, 3, the air inlet pipe joint, 4, water inlet interface, 5, the interface of giving vent to anger, 6, spray holes, 7, rotor shaft, 8, intake interface, 9, boss, 10, gear platform, 11, limiting plate, 12, trocar sheath, 13, check valve, 14, first takes over, and 15, locating ring, 16, pressure maintaining valve, 17, second takes over.

The specific embodiment

A kind of disposable dental handpiece as shown in Figure 1, Figure 2 and Figure 3, comprise head 1 and fuselage 2, head 1 is provided with rotor shaft 7, be provided with wind wheel in head 1, the chamber that wind wheel is installed is called the wind wheel chamber, the front end of fuselage 2 is provided with spray holes 6, and the tail end of fuselage 2 is provided with intake interface 8, give vent to anger interface 5 and water inlet interface 4, and the tail end of fuselage 2 also is provided with air inlet pipe joint 3.

As shown in Figure 4 and Figure 5, air inlet pipe joint 3 comprises trocar sheath 12, check valve 13, first takes over 14, pressure maintaining valve 16 and second takes over 17, check valve 13, first takes over 14, pressure maintaining valve 16 and second is taken over 17 4 and is connected successively, first takes over cover on 14 movable locating ring 15, locating ring 15 is fixed on the inwall of trocar sheath 12, the maximum rotating diameter of the maximum rotating diameter of check valve 13 and pressure maintaining valve 16 all is greater than the interior ring diameter of locating ring 15, trocar sheath 12 is connected with the tail end socket of fuselage 2, an end away from the first adapter 14 on check valve 13 is connected with the intake interface 8 on fuselage 2, second takes over 17, the interface 5 of giving vent to anger all stretches out trocar sheath 12 with water inlet interface 4.As shown in Figure 3, the outer wall of the tail end of fuselage 2 is provided with two overhanging boss 9, the port be connected with fuselage 2 on trocar sheath 12 is provided with the gear platform 10 of stretching in two, one of them gear platform 10 is provided with the limiting plate vertical with this gear platform 10 11, two of trocar sheath 12 gear platforms 10 are hung on two boss 9 of tail end of fuselage 2, and one of them boss 9 is against on limiting plate 11.

Anti-resorption operation principle: during work, in the second adapter 17, tap into trachea, on the interface 5 of giving vent to anger, pick out trachea, on water inlet interface 4, tap into water pipe.Set up thimble on rotor shaft 7, the air inlet pipe ventilation, check valve 13 is opened, rear drive rotor shaft 7 rotates, thimble polishing tooth, and workpiece finishes gas, air inlet pipe stops ventilation, rotor shaft 7 slowly stops, and the wind wheel chamber in head 1 produces negative pressure, and the oral cavity waste liquid enters the wind wheel chamber, and the wind wheel chamber enters intake interface 8, check valve 13 is closed, and waste liquid can not enter breather, and the breather recycling can not cause cross infection.

Claims

1. a dental handpiece, comprise head and fuselage, the tail end of fuselage is provided with intake interface, give vent to anger interface and the water inlet interface, it is characterized in that: the tail end of described fuselage also is provided with the air inlet pipe joint, the air inlet pipe joint comprises trocar sheath, check valve, first takes over, pressure maintaining valve and second is taken over, check valve, first takes over, pressure maintaining valve and the second adapter are serially connected in the adapter assembly successively, taking over assembly is arranged in trocar sheath, taking over assembly is connected with the inwall of trocar sheath, trocar sheath is connected with the tail end socket of fuselage, an end away from the first adapter on check valve is connected with the intake interface on fuselage, second takes over, the interface of giving vent to anger all stretches out trocar sheath with the water inlet interface.

2. dental handpiece according to claim 1, it is characterized in that: described first takes over upper cover movable locating ring, locating ring is fixed on the inwall of trocar sheath, and the maximum rotating diameter of check valve and the maximum rotating diameter of pressure maintaining valve all are greater than the interior ring diameter of locating ring.

3. dental handpiece according to claim 2, it is characterized in that: the outer wall of described fuselage tail end is provided with two overhanging boss, the port be connected with fuselage on described trocar sheath is provided with the gear platform of stretching in two, one of them gear platform is provided with the limiting plate vertical with this gear platform, two gear platforms of trocar sheath are hung on two boss of fuselage tail end, and one of them boss is against on limiting plate.