Intravaginal ultrasonic probe with changeable detection direction

The invention discloses an intravaginal ultrasonic probe with a changeable detection direction, and relates to the technical field of gynecological medical instruments, the intravaginal ultrasonic probe comprises an operation box, a main controller is mounted on the left side of the operation box, a swing seat is mounted at the top of the operation box in a penetrating and inserting manner, and the swing seat is hollow and is provided with a gear, a rack, a spherical block and a connecting rod; when the ultrasonic probe main body and the ultrasonic sensor need to be singly converted leftwards, rightwards, upwards or downwards, a hand wheel can be rotated, so that the hand wheel drives a threaded rod to rotate, the threaded rod drives a movable plate to move, the movable plate drives a top rack to move, and the rack pushes a gear at a corresponding position to deflect; the gear drives the spherical block on the toothed bar to deflect, the spherical block drives the top connecting rod to deflect, and the connec