Oral cavity opener

The utility model discloses an oral cavity opener, including first connecting rod and second connecting rod, two arc connecting rod's preceding tip all is equipped with the section of stretching intothat goes up surface vertical with arc connecting rod, and the section of stretching into can stretch into oral cavity portion to two sections of stretching into symmetry stretches into the both sidesportion in oral cavity, then the distance between the adjustment dual tactics handle, thereby adjusts the distance between two sections of stretching into, adjusts oral cavity degree of strutting promptly. Adjusting the distance back between the dual tactics handle, promoting the locating piece forward, make in fixture block on the locating piece clamps the draw -in groove, the fixed of arc locating plate can be realized to the fixed position piece to realize the fixed of dual tactics handle, just so can make the section of stretching into keep the range of strutting in oral cavity. The mouthgag of this kind of struct