Contra-angle handpiece with conducting strip arranged in rear cover and root canal preparation machine

Abstract

The invention relates to a contra-angle handpiece with a conducting strip arranged in a rear cover and a root canal preparation machine. The contra-angle handpiece with the conducting strip arranged in the rear cover comprises a handpiece, the rear cover, and a cutting tool; a handpiece core assembly used for driving the cutting tool to rotate is arranged inside the handpiece; the conducting stripis arranged inside the rear cover, and the conducting strip comprises a semi-ring body and an elastic part; the semi-ring body is sleeved by the rear cover; the tail end of the elastic part is connected with the middle of the semi-ring body; the front end of the elastic part extends to the center of the semi-ring body; and the front end of the elastic part is in contact with the center of the endface of the cutting tool when the rear cover is fixed to the handpiece.

Description

technical field [0001] The invention relates to the technical field of dental auxiliary equipment, in particular to a bending head and a root canal preparation machine with a built-in conductive sheet in the back cover. Background technique [0002] There is known a device for carrying out endodontic treatment and at the same time measuring the root canal, using a cutting tool, such as a file or a drill, which is also used as a measuring probe. In this case, the cutting tool is used as an electrode of the root canal length measurement circuit, and the measurement signal needs to be transmitted to the control host. [0003] Some bending heads with the function of root canal length measurement integrate the conduction circuit inside the head, relying on the elasticity of the conductive sheet to hug the rotating shaft to ensure that the test signal can be transmitted to the cutting tool during rotation, but the conductive sheet and the internal rotating shaft of the bender The...

AI Technical Summary

Problems solved by technology

[0003] Some bending heads with the function of root canal length measurement integrate the conduction circuit inside the head, relying on the elasticity of the conductive sheet to hug the rotating shaft to ensure that the test signal can be transmitted to the cutting tool during rotation, but the conductive sheet and the internal rotating shaft of the bender The relatively high linear speed causes the conductive sheet to be more easily worn (seriously reducing the life of the conductive sheet), and the impurities generated after the wear cause poor contact between the rotating shaft and the conductive sheet and affect the test signal transmission, and the brush sheet is integrated inside the machine head , very difficult to disassemble and very expensive to repair

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