Expansion screw for regulating teeth

摘要

An expansion screw for regulating teeth has two expansion-screw bodies, the spacing between which can be changed by means of a spindle, and has at least one guide pin which is aligned parallel to the spindle and engages in guide openings of the two expansion-screw bodies, the spindle having a first and a second threaded portion, each of which is connected to an expansion-screw body, and an actuating portion, with at least one point for application of a tool for rotating the spindle, and the expansion screw has a locking mechanism which interacts with the actuating portion in order to secure the spindle against unintended rotation. The locking mechanism has at least one locking element with a locking member which is disposed laterally alongside the actuating portion and subjects the actuating portion to an axial spring force when the spindle is rotated.

主权项

1. An expansion screw for regulating teeth, having two expansion-screw bodies and a spindle, and spacing between the bodies, the spacing between which can be changed by means of the spindle, and at least one guide pin which is aligned parallel to the spindle and engages guide openings of the two expansion-screw bodies, the spindle having a first threaded portion and a second threaded portion, each of which is connected to an expansion-screw body, and an actuating portion, with at least one point for application of a tool for rotating the spindle, and the expansion screw having a locking mechanism which interacts with the actuating portion in order to secure the spindle against unintended rotation, wherein
the locking mechanism has at least one locking element with a locking member which is disposed laterally alongside the actuating portion and subjects the actuating portion to a spring force that is axially aligned with respect to the longitudinal axis of the spindle when the spindle is rotated, and the locking member has at least one latching element which is adapted to be latched, in at least one angular position of the spindle, to a corresponding latching element disposed on an axial end face of the actuating portion.