Dental chair provided with oral isolator

A dental chair provided with an oral isolator, comprising:

• a dental chair body, an oral isolator, a tray, a tray bracket and a drainage tube;
• the dental chair body comprises a backrest plate, a seat plate, a leg support plate, a lifting adjustment mechanism and a tilt adjustment mechanism;
• the lifting adjustment mechanism is disposed at a bottom of the seat plate and is configured to adjust a height of the dental chair body;
• and the tilt adjustment mechanism is disposed at a connection between the backrest plate and the seat plate, and at a connection between the seat plate and the leg support plate, and the tilt adjustment mechanism is configured to adjust a connection angle;
• the tray bracket is disposed at a side portion of the dental chair body, the tray is disposed at a top of the tray bracket, and the oral isolator is placed on the tray;
• and the oral isolator is configured to isolate an oral cavity from a trachea;
• the oral isolator comprises:
• an isolator body, a sealing retaining ring and a T-shaped connector;
• and the isolator body comprises a hollow cylindrical tube bracket, a tongue plate, a polygonal sealing plate and a first upper isolation plate;
• the hollow cylindrical tube bracket comprises a first lower tube, a second lower tube, a first middle tube, a second middle tube, a first upper tube, a second upper tube and an upper connecting tube;
• the first lower tube and the second lower tube are identical in structure and are disposed at a bottom portion of the hollow cylindrical tube bracket;
• the first middle tube and the second middle tube are identical in structure and are disposed at a middle portion of the hollow cylindrical tube bracket;
• and the first upper tube and the second upper tube are identical in structure and are disposed at an upper portion of the hollow cylindrical tube bracket;
• the first lower tube is connected to the first middle tube, the first middle tube is connected to the first upper tube, the second lower tube is connected to the second middle tube, the second middle tube is connected to the second upper tube, and the upper connecting tube is connected between the first upper tube and the second upper tube;
• the T-shaped connector is connected between the first lower tube and the second lower tube;
• the upper connecting tube is provided with a through-hole communicating with an outside;
• an obtuse included angle is formed between each lower tube and the corresponding middle tube;
• an obtuse included angle is formed between each middle tube and the corresponding upper tube;
• an acute included angle is formed between the first lower tube and the second lower tube;
• and an acute included angle is formed between the first upper tube and the second upper tube;
• and
• the tongue plate is in a shape of a gradually rising arched protrusion, and the tongue plate is disposed between the first lower tube and the second lower tube;
• the first upper isolation plate is hermetically connected to a region enclosed by the first upper tube, the second upper tube and the upper connecting tube, and the first upper isolation plate extends to a top of each middle tube;
• and the polygonal sealing plate is hermetically connected to a region enclosed by the first upper isolation plate, each middle tube and the tongue plate.