Abstract: A dental treating apparatus according to the present invention includes: a hand piece; a head unit; a driving unit; a resistor for load detection; a load comparing unit; and a control unit. The hand piece drivably holds a cutting tool on the head unit. The driving unit drives the cutting tool in a normal rotation direction or in a reverse rotation direction. The resistor for load detection detects a load applied to the cutting tool. The load comparing unit compares the detected load and a reference load each time driving for rotating the cutting tool in the reverse rotation direction by a predetermined rotation angle is performed. The control unit controls the driving unit based on a result of comparison by the load comparing unit.

Abstract: The present invention is directed to a dental treating apparatus including: a hand piece; a power source (micro motor); a driving unit (motor driver); and a controller. The driving unit drives the cutting tool so as to be switchable between first driving in which the cutting tool is driven clockwise and second driving in which the cutting tool is driven counterclockwise. When a rotation direction in which the cutting tool cuts an object to be cut is defined as normal rotation and a rotation direction opposite to the normal rotation is defined as reverse rotation, the controller sets the first driving as driving for the normal rotation when a first cutting tool rotated clockwise is held on the head unit, and sets the second driving as the driving for the normal rotation when a second cutting tool rotated counterclockwise is held on the head unit.

Abstract: The present invention is directed to a dental treating apparatus including: a hand piece; a power source (micro motor); a driving unit (motor driver); a driving state detecting unit (resistor for load detection, root canal length measuring circuit); and a controller. The hand piece drivably holds a cutting tool on a head unit. The power source drives the cutting tool. The driving unit drives the cutting tool with twist driving in which the normal rotation and the reverse rotation are repeated. The driving state detecting unit detects a driving state of the cutting tool. The controller changes at least one parameter of a rotation angle in the normal rotation, a rotation angle speed in the normal rotation, a rotation angle in the reverse rotation, and a rotation angle speed in the reverse rotation in accordance with the driving state of the cutting tool detected by the driving state detecting unit.

Abstract: A dental treating apparatus has a head unit having a holder for drivably holding a cutting tool, a hand piece body connected to the head unit for transmitting power to drive the cutting tool, and a controller for controlling the driving of the cutting tool. The dental treating apparatus further has a conductive body disposed in an inside of the hand piece body for transmitting an electric signal, contact members electrically connecting the cutting tool or the holder with the conductive body, a connection failure detector for applying a predetermined input signal to the conductive body and detecting a connection failure of the contact members based on a response to the input signal obtained via the cutting tool, and a notifier for notifying a user based on the detection result of the connection failure detector.

Abstract: A dental treating apparatus according to the present invention includes: a hand piece; a head unit; a driving unit; a resistor for load detection; a load comparing unit; and a control unit. The hand piece drivably holds a cutting tool on the head unit. The driving unit drives the cutting tool in a normal rotation direction or in a reverse rotation direction. The resistor for load detection detects a load applied to the cutting tool. The load comparing unit compares the detected load and a reference load each time driving for rotating the cutting tool in the reverse rotation direction by a predetermined rotation angle is performed. The control unit controls the driving unit based on a result of comparison by the load comparing unit.

Abstract: A dental treating apparatus according to the present invention includes: a hand piece; a head unit; a driving unit; a control unit; a load specifying unit; and a load comparing unit. The hand piece drivably holds a cutting tool on the head unit. The driving unit drives the cutting tool in a normal rotation direction or in a reverse rotation direction. The load comparing unit compares a load detected and a reference load. During a normal rotation period until driving for rotating the cutting tool in the normal rotation direction by the driving unit satisfies a predetermined first condition, the control unit maintains a rotation direction of the cutting tool in the normal rotation direction, and when a result of comparison by the load comparing unit attains a predetermined result during the normal rotation period, the control unit controls the rotation direction to the reverse rotation direction.

Abstract: The present invention provides a root canal length measuring apparatus and a root canal treatment apparatus which can acquire a position of a measurement electrode with high reproducibility in the same root canal. The root canal length measuring apparatus includes a measurement electrode which is inserted into a root canal, an oral electrode which is held in an oral cavity, a measuring section which applies an electric measuring signal between the measurement electrode and the oral electrode and specifies an apex position so as to measure a root canal length, a memory means which stores position data corresponding to a position of the measurement electrode in a root canal acquired by the measuring section, and an operating means which instructs the memory means to store the position data.

Abstract: An imaging device for dental treatment for use in an instrument for dental treatment with a head to which a rotary cutting tool can be attached. The imaging device for dental treatment comprises: an imaging module with an imaging element; and a mounting section through which the imaging module is detachably attached to the instrument for dental treatment such that the imaging module is on the bottom side or on the lateral side of the head, and that the imaging module is in a posture that causes the imaging axis of the imaging module and the rotary axis of the rotary cutting tool to be substantially parallel.

Abstract: A functional module type medical apparatus for use in medical treatment and/or diagnosis and a functional module with individual function of medical treatment and/or diagnosis are disclosed. The functional module type medical apparatus comprises a common functional body with a module connection part, having at least one of a display section for displaying necessary information relating to medical treatment and/or diagnosis, an operation section for medical treatment and/or diagnosis, and a power source section for supplying driving power to the medical apparatus, in which the module connection part is constructed such that the corresponding connection part of a functional module having medical treatment and/or diagnosis is replaceably connected thereto, whereby the common functional body cooperatively functions in accordance with its individual function of the functional module when the functional module is connected thereto.

Abstract: A treatment unit includes: a communication part that receives through a communication cable information about a root canal length acquired by a root canal length measuring unit as an external diagnostic unit; a display device on which the information about a root canal length is displayed; and a treatment unit body to which a file for root canal enlargement is attached. The treatment unit body forms a holding part held by a user. The display device is provided on the outer circumference of the holding part. The user can visually recognize a root canal length displayed on the display device while performing root canal enlargement with the treatment unit held by the user.

Abstract: An imaging device for dental treatment for use in an instrument for dental treatment with a head to which a rotary cutting tool can be attached. The imaging device for dental treatment comprises: an imaging module with an imaging element; and a mounting section through which the imaging module is detachably attached to the instrument for dental treatment such that the imaging module is on the bottom side or on the lateral side of the head, and that the imaging module is in a posture that causes the imaging axis of the imaging module and the rotary axis of the rotary cutting tool to be substantially parallel.

Abstract: There is provided a workpiece conveyor including a workpiece conveying path which guides the conveyance of a workpiece; and a pair of air-blowing devices which are disposed on both sides of the workpiece conveying path and blow air uniformly to the workpiece on the workpiece conveying path from both sides to give propulsion to the workpiece for conveyance.

Abstract: The present invention provides a root canal length measuring apparatus and a root canal treatment apparatus which can acquire a position of a measurement electrode with high reproducibility in the same root canal. The root canal length measuring apparatus includes a measurement electrode which is inserted into a root canal, an oral electrode which is held in an oral cavity, a measuring section which applies an electric measuring signal between the measurement electrode and the oral electrode and specifies an apex position so as to measure a root canal length, a memory means which stores position data corresponding to a position of the measurement electrode in a root canal acquired by the measuring section, and an operating means which instructs the memory means to store the position data.

Abstract: The invention intends to provide a dental diagnostic device capable of detecting whether or not an electric leakage path which departs from a root canal, bypassing an apex is contained in a conductive path. The dental diagnostic device includes a measuring electrode, an oral electrode, a measurement signal applying means, a measuring means and a detecting means. The measuring electrode is inserted into a root canal of a tooth which is a diagnosing object. The oral electrode is brought into electric contact with oral mucosa. The measurement signal applying means applies a measurement signal in between the measuring electrode and the oral electrode. The measuring means obtains data corresponding to the electric characteristic of at least part of a conductive path between the measuring electrode and the oral electrode based on measurement of electric response to the measurement signal.

Abstract: There is provided a workpiece conveyor including a workpiece conveying path which guides the conveyance of a workpiece; and a pair of air-blowing devices which are disposed on both sides of the workpiece conveying path and blow air uniformly to the workpiece on the workpiece conveying path from both sides to give propulsion to the workpiece for conveyance.

Abstract: A spot joining device comprises a joining tool, an induction motor for rotating the joining tool, a servo motor for vertically moving the joining tool along an axis of the joining tool, and a receiving member placed opposite to the joining tool. The joining tool includes a short-column shaped shoulder and a pin protruded downwardly along the axis from a central portion of a lower face of the shoulder at a tip end portion thereof. Two works such as aluminum alloy plates are lapped and placed on a receiving member. When the joining tool is rotated and moved downwardly, a joint spot of the works is heated and softened due to friction heat generated by the rotating pin. Thereby, plastic flow occurs in the vicinity of the joint spot. The vicinity of the joint spot is stirred and the works are fused at the joint spot. Thus, the works are spot-joined.

Abstract: Disclosed is a friction stir welding method of welding a butted portion of work pieces relatively easily and firmly with an improved finish after the butted portion is tack-welded. In the method, a plurality of work pieces are placed to be butted, a plurality of V-shaped grooves are intermittently formed along the butted portion, each of the grooves is tack-welded by using a welding material by TIG welding or MIG welding, deposits in the tack-welded sections are cut and removed so as to be substantially coplanar with a surface of the work pieces, and then friction stir welding is continuously performed over the entire length of the butted portion, and thus, the work pieces are joined.

Abstract: A connection assembly detachably connected to a main body of a medical apparatus for use in diagnosis and treatment, wherein the connection assembly has a communication means for sending and receiving the information on said connection assembly to and from said medical apparatus.

Abstract: Disclosed is a rotating tool for friction stir welding capable of providing uniform welding strength by friction stir welding over the entire length of a butted portion of work pieces including tack-welded sections by weld metal structures, and a method and apparatus of friction stir welding using the rotating tool. The rotating tool for friction stir welding has a cutting blade for removing the weld metal structures. By rotating and moving the rotating tool along the butted portion of the two work pieces, friction stir welding is carried out while removing the weld metal structures by using the cutting blade. The rotating tool is provided with a shoulder portion at a tip end side of a tool body and a pin at a tip end of the shoulder portion. Two cutting blades may be symmetrically provided from the shoulder portion to a tip end portion of the tool body.