Automatic stop bone drill

Abstract

The invention provides a bone drill capable of stopping rotating automatically. The bone drill at least comprises a drill head, a motor, a motor driving circuit and a control module, wherein the motor is used for driving the drill head to work, the motor driving circuit is used for driving the motor to work, and the control module is used for controlling stopping and rotating of the motor at the moment when a bone is drilled through. The control module comprises a current collecting unit, a current comparison circuit, a control unit and a switch circuit, the current collecting unit is used for collecting current of the motor, the current comparison circuit is electrically connected with an output end of the current collecting unit, the control unit is electrically connected with an output end of the current comparison circuit, the switch circuit is connected with an output end of the control unit and arranged between a power source and the motor driving circuit so as to control on and off of a power supply circuit of the motor driving circuit, and the control unit can control on and off of the switch circuit according to phase-step changes of the current of the motor. The bone drill is capable of automatically stopping rotating at the moment when the bone is drilled through, and injury to patients can be avoided effectively.

Description

technical field [0001] The invention relates to a medical device, in particular to an automatic stop-rotating bone drill. Background technique [0002] Bone drill is a commonly used surgical instrument in orthopedics. It is used in operations such as the continuation of broken bones. There are serious safety hazards in the existing bone drill during use, which is mainly reflected in the depth of drilling into the bone and the stoppage of the bone drill. Control; the doctor usually starts the drill at the relatively safe side of the human body when drilling the bone, that is, starts to drill the bone on the side where the blood vessels and nerves of the bone to be drilled are less distributed, because the nerves and blood vessels at the fracture site have been traumatized to a certain extent However, when the existing bone drill drills through the bone, it is often only based on the doctor's experience to judge whether the bone drill penetrates the patient's bone and to contr...

AI Technical Summary

Problems solved by technology

[0002] Bone drill is a commonly used surgical instrument in orthopedics. It is used in operations such as the continuation of broken bones. There are serious safety hazards in the existing bone drill during use, which is mainly reflected in the depth of drilling into the bone and the stoppage of the bone drill. Control; the doctor usually starts the drill at the relatively safe side of the human body when drilling the bone, that is, starts to drill the bone on the side where the blood vessels and nerves of the bone to be drilled are less distributed, because the nerves and blood vessels at the fracture site have been traumatized to a certain extent However, when the existing bone drill drills through the bone, it is often only based on the doctor's experience to judge whether the bone drill penetrates the patient's bone and to control the stop of the bone drill, which is extremely easy to cause secondary damage to the blood vessels and nerves on the other side of the bone. Injury, or even damage that is difficult to recover, although currently the bone is drilled after the periosteum and muscle are stripped from the bone, but it increases the difficulty and strength of the operation, and most importantly, it increases the damage to the bone to be drilled. Therefore, how to ensure that the bone drill can stop in time when the bone drill drills through the bone has become a technical problem

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