KR101136828B1 - Torque control apparatus of dental clinic hand piece by non-contact sensor - Google Patents

Abstract

PURPOSE: A torque control device of a dental handpiece is provided to adjust torque minutely and to enable a user to conveniently operate a handpiece. CONSTITUTION: A torque control device of a dental handpiece comprises a handpiece(10), a torque control device(20), and a main body(30). In the inner surface of the main body comprising the handpiece, a drive motor is installed. In the tip end of the drive motor, a receiving room is equipped. In the bottom center of the receiving room, the rotation shaft of the drive motor is projected. In one bottom side of the receiving room, a hole sensor is equipped. The torque control device is combined with the receiving room of the main body.

Description

TORQUE CONTROL APPARATUS OF DENTAL CLINIC HAND PIECE BY NON-CONTACT SENSOR}

The present invention relates to an improvement of a dental handpiece, and in particular, having a torque control device capable of controlling torque without contact at the distal end of the dental handpiece, suitable for use and purpose of the handpiece. By setting and using the torque to the micro range, the dental treatment using the handpiece, in particular the procedure of the micro-implant for orthodontics, can be made conveniently and effectively.

In general, various types of treatment related to teeth are performed in a dental clinic. Various types of treatments include grinding teeth, placing a prosthetic implant, or placing a micro implant in the alveolar bone for orthodontics. Will be done.

In the treatment process, a prosthetic handpiece is generally used in the case of tooth polishing or prosthetic implant placement. However, in the case of a micro-implant placed in the alveolar bone for orthodontics, the prosthetic handpiece cannot be used. In most cases, a manually operated hand driver is used.

This is because the prosthetic implant is generally composed of a thick and long, because the torque of the handpiece for placing the prosthetic implant in the teeth is not only strong but also fine adjustment of the torque.

In the case of the prosthetic handpiece, as a means for torque adjustment, the length and the diameter of the handpiece are not only increased due to the volume of the load cell or the strength gauge installed in the handpiece because the control is performed using a load cell or a strength gauge. As a result, the weight becomes heavy.

Therefore, when the prosthetic handpiece is used for orthodontic micro-implant placement, the micro-implant is cut in the alveolar bone during the implantation process due to the strong torque and fine adjustment, and the handpiece is large and heavy. There were drawbacks such as being unable to use it for microimplant placement, which was held by the operator and required delicate manipulation.

The present invention comprises a device capable of controlling torque in a contactless manner using a magnetic field and a Hall sensor at the tip of the dental handpiece to correct the above-mentioned disadvantages, in particular of the torque suitable for the orthodontic micro-implant placement As well as setting, the torque control can be adjusted in fine units, and the handpiece can be made small and light, thereby allowing the operator to hold the handpiece and allow convenient and delicate operation, thereby making effective treatment possible.

As a means for solving the above problems, the present invention constitutes a storage room in which a rotating shaft bar is protruded at the front end of the main body of the dental handpiece, and constitutes a hall sensor capable of detecting a signal of a magnetic field at the floor of the storage room. The housing is rotatably coupled to the housing in the long room, and the rotating movable body and the movable movable body are assembled in the housing so as to be axially coupled with the rotating shaft bar protruding from the operating chamber, so that they can be rotated together. The rotation angle is changed in the housing as much as the elastic modulus of the spring, and a plurality of magnets are installed in the lifting movable body at equal intervals so as to move up and down the housing according to the change of the rotation angle of the rotating movable body so as to be close to the hall sensor configured in the storage room. The torque value may be detected according to the distance between the magnet and the hall sensor.

The present invention constitutes a storage room at the distal end of the dental handpiece, and a torque control device composed of a magnetic field and a hall sensor in the storage room, which makes the handpiece compact and lightweight, and at the same time the use and purpose of the handpiece. By setting the torque value accordingly, it is possible to improve the efficiency, convenience and safety of the treatment by using the handpiece instead of manual operation in the case of delicate procedures such as orthodontic micro implant placement. This is the effect.

1: perspective view of a dental handpiece to be provided in the present invention
2: exploded perspective view of FIG. 1
3: exploded perspective view of FIG. 1
4 is a main cross-sectional configuration of the present invention
5: enlarged view of FIG. 4
6 is a state diagram in which the lifting movable body attached to the magnetic field sensor is lowered in the state of FIG.
7: Enlarged view of FIG. 6
8 is a state diagram installed between the housing and the rotatable body in the present invention
9 is a state in which the spring is compressed by the resistance generated in the rotational force in the state of FIG.
Fig. 10 is a state diagram in which a part of the housing is cut away as a main perspective view of the apparatus of the present invention.
11 is a state diagram with the housing removed in the state of FIG.
12: The state diagram with the housing removed in the state of FIG.
13 is an exemplary view of the use state of the present invention
14 is a state diagram in which a signal of torque is detected and displayed in a hall sensor of the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 12 is a state diagram showing the configuration of the dental handpiece 10 and the torque control device 20 mounted on the handpiece to be provided in the present invention, the present invention is a front end portion of the dental handpiece 10 By installing a contactless torque control device 20 using a magnetic field and a hall sensor in the dental handpiece 10, the dental handpiece 10 can be miniaturized and lightened, and the torque can be finely adjusted so that the dental treatment requires delicate manipulation such as micro implant placement. It can be used effectively.

2 and 3, the present invention includes a main body 30 constituting the handpiece 10 and a torque control device 20 assembled to the front end of the main body 30.

The main body 30 is a drive motor (not shown) is installed on the inner surface, the storage chamber 31 is configured at the front end, the rotary shaft rod 32 of the drive motor protrudes in the center of the bottom of the storage chamber 31 It is configured, and the hall sensor 33 is provided on one side of the floor.

The torque control device 20 coupled to the storage chamber 31 of the main body 30 is composed of a housing 40, a rotary movable body 60 and a lifting movable body 70, the configuration of which is as follows.

In the housing 40, the rotatable movable body 60 and the lifting movable body 70 are accommodated, and the housing chamber 42 is formed on the inner surface of the main body 41 of the housing 40, and the bearing 43 is fitted on the front surface of the housing 40. The rotating shaft 44 is protruding, and fastening holes 45 are bored at both sides.

The stopper 50 is inserted into and fixed to an inner bottom surface of the storage chamber 42 formed on the inner surface of the main body 41 of the housing 40, and the stopper 50 is configured as follows.

That is, as shown in FIGS. 2 and 3, the fixing piece 55 having the screw hole 53 and the concave groove 54 is formed at both sides of the short pipe 51 through which the through hole 52 is drilled, thereby providing a space therebetween. A screw hole 53 formed in the stopper 50 is inserted into the stopper 50 of the housing 40 by inserting the stopper 50 having the above-described configuration into the storage chamber 42 of the housing 40. Side by side with 45, and assembling the fastening piece 46 to the screw hole 53 through the fastening hole 45 in the above state so that they are assembled.

At this time, the fixing piece 55 protruding on both sides of the short pipe 51 is formed to be thicker than the thickness of the short pipe 51 so that the lower end portion of the fixing piece 55 protrudes below the short pipe 51 so that the stepped jaw 57 is formed. do.

When the assembling of the stopper 50 is completed on the inner bottom surface of the storage chamber 42 of the housing 40 as described above, two springs are provided in each of the spaces 56 formed at both sides of the stopper 50 as shown in FIG. 8. Insert 58 so that one end of the spring 58 is positioned in the recess 54 of the stopper 50.

In the above state, the rotatable body 60 is coupled to the housing 42 of the housing 40, and the rotatable body 60 is configured as follows.

The rotating piece 63 having the groove 62 formed on the upper end of the shaft pipe 61 through which the shaft hole 66 is formed is projected on both sides, and the plate 64 is formed under the rotating piece 63. 64) Four slide rods 65 are formed at the bottom.

Therefore, a spring (in which the rotary piece (63) formed in the rotary mover (60) is inserted into the space portion (56) of the stopper (50) by inserting the rotary mover (60) having the above-described configuration into the storage chamber (42) of the housing (40). 58), wherein the end of the spring 58 is positioned in the recess 62 of the rotating piece 63 as shown in FIG.

As described above, when the rotatable movable body 60 is assembled in the storage chamber 42 of the housing 40, the lifting movable body 70 is fitted to be assembled with the rotatable movable body 60, and the lifting movable body 70 is configured as follows. do.

Four protrusion pieces 74 having an inclined surface 73 formed on the outer circumferential surface of the disc 72 through which the through-hole 71 is formed are projected, so that the inclined grooves 75 are formed between the stone pieces 74, and each protrusion piece 74 is formed. At the lower end, the magnet 76 is configured to protrude downward to constitute the lifting movable body 70.

Accordingly, when the lifting movable body 70 having the above-described configuration is fitted into the storage chamber 42 of the housing 40, the lower end of the shaft tube 61 of the rotary movable body 60 is inserted into the through hole 71 drilled through the disc 72. At the same time, the rod 65 of the rotatable body 60 is positioned in the inclined groove 75 of the elevating movable body 70, and the upper end of the magnet 76 is placed on the bottom of the flat plate 64 of the rotatable movable body 60. Proximity.

At this time, the rotatable movable body 60 fitted into the housing chamber 42 of the housing 40 is rotatably fitted by the elastic modulus of the spring 58, and the lifting movable body 70 is rotatably fitted without rotation.

The guide plate 80 through which four guide holes 81 are drilled is coupled to the lower side of the elevating movable member 70, and the guide plate 80 is fixed to the bottom of the storage chamber 42 of the housing 40 in the form of interference fit. The magnet 76 of the lifting movable body 70 is fitted into the guide hole 81 bored in 80 to be assembled, and the guide plate 80 is made of a nonmagnetic material (see FIG. 10).

As described above, the main body 30 includes a torque control device 20 in which a stopper 50, a rotatable movable body 60, a lifting movable body 70 and a guide plate 80 are sequentially assembled in the storage chamber 42 of the housing 40. When assembled to the storage compartment 31 configured at the front end, as shown in Figures 4 to 7 the rotary shaft rod 32 is assembled to fit into the shaft hole 66 formed at the lower end of the shaft tube 61 of the movable body 60 When the rotary shaft rod 32 rotates, the lifting movable body 70, the rotary movable body 60, and the housing 40 rotate.

When the torque control device 20 is completed in the storage chamber 31 of the main body 30 as shown in Figures 4 to 7, the cover 91 and the support shaft tube 92 on the upper surface of the torque control device 20 Insert the connecting socket 90 to the threaded hole 93 formed on the side of the cover 91 to match the through hole 34 of the upper end of the storage compartment 31 of the main body 30, and then the fastening piece 35 Through the connection socket 90 is fastened to the upper end of the main body 30, the bearing 43 and the rotating shaft 44 configured in the housing 40 is located in the through hole 94 configured in the support shaft tube 92 do.

Accordingly, when the handpiece 10 is operated, a driving motor (not shown) configured in the main body 30 is operated to rotate the rotary shaft 32, and the torque control device 20 is rotated by the rotation of the rotary shaft 32. Will rotate.

At this time, when a load is applied to the rotation shaft 44 of the housing 40 constituting the torque control device 20, the rotary movable member 60 is rotated by a predetermined angle while compressing the spring 58 by an elastic modulus, and thus the rotary movable member 60 Since the lifting movable member 70 located at the lower end is lowered by the inclined surface 73 in contact with the rod 65 of the rotary movable member 60, the magnet 76 positioned in the guide hole 81 of the guide plate 80. The lowering is close to the Hall sensor 33, and the output value of the Hall sensor 33 can be detected according to the distance between the Hall sensor 33 and the magnet 76.

Reference numeral 100 is a contra-angle, 110 is a control box, 120 is a cable.

The handpiece 10 of the present invention configured as described above is connected to the control box 110 through the cable 120 as shown in FIG. 13, and has a contra-angle () at the connection socket 90 configured at the front end of the handpiece 10. When the coupling 100 is coupled, the rotary shaft 44 of the housing 40 located in the support shaft tube 92 of the connecting socket 90 is coupled with the rotary shaft (not shown) configured in the contra-angle 100. When power is applied in the state, the driving motor configured in the handpiece 10 is operated to rotate the rotating shaft rod 32.

The housing 40 located in the cabinet 31 is rotated by the rotation of the rotary shaft 32, so that the rotating shaft of the contra-angle 100 coupled with the rotating shaft 44 of the housing 40 rotates, The surgical tool inserted at the end of the angle 100 is rotated, and the necessary treatment is performed using the rotating tool.

For example, a case where a micro implant for orthodontics is to be placed in the alveolar bone will be described.

For reference, the micro-implant is a screw-type part that is screwed to the alveolar bone in the oral cavity for orthodontic use. Since the size and size are small and thin, a prosthetic handpiece provided in the related art can be easily broken because of high torque. Although it was not possible to use, it was mainly placed by using a hand driver that can be fine-tuned manually, the handpiece 10 to be provided in the present invention is not only compact and lightweight, but also can be set to the desired torque, and also fine torque adjustment This makes it possible to conveniently perform procedures such as micro implant placement.

Assuming that the stable torque value for implanting the micro implant for orthodontics in the alveolar bone is 15 Ncm, if the torque value is set to 15 Ncm in the control box 110, the hand during micro implant placement using the handpiece 10 When the torque value of the piece 10 reaches 15 Ncm, the operation of the driving motor is stopped and the operation of the handpiece 10 is stopped. Therefore, excessive torque is transmitted during the implantation of the micro implant to prevent the micro implant from being cut. It becomes possible.

Torque detection through the torque control device 20 is made as follows.

That is, when power is applied to the handpiece 10, the rotating shaft rod 32 is rotated by the drive motor, and thus the rotating movable body 60 to which the rotating shaft rod 32 is inserted is rotated, and the rotating movable body 60 is rotated. By the housing 40 is rotated to rotate the rotating shaft 44, the surgical tool fitted to the contra-angle 100 is rotated.

At this time, when a load, that is, torque is applied to the rotational force of the surgical tool coupled to the contra-angle end during the rotation operation is transmitted to the housing 40 directly connected to the rotating shaft 44, the rotary mover 60 is inserted into the housing 40 Since is rotated by the rotary shaft rod 32 of the drive motor, there is a difference in the rotational force between them, so that the spring 58 located between them is compressed by the elastic modulus of the spring in FIG.

When torque is applied to the housing 40 as described above, the rotatable movable body 60 slightly compresses the spring 58 by an elastic modulus as shown in FIG. 9 in the direction of the arrow A with respect to the housing 40. Will be rotated further.

At this time, the lifting movable body 70 positioned below the rotatable movable body 60 is rotated because the magnet 76 of the lifting movable body 70 is fitted into the guide hole 81 of the guide plate 80 fixed to the lower end of the housing 40. You will not.

Therefore, when the rotary movable member 60 rotates in the direction of the arrow A with respect to the housing 40 and the movable movable member 70 while compressing the spring 58, it is located in the inclined groove 75 of the movable movable member 70. Since the rod 65 of the rotatable movable body 60 moves along the inclined surface 73, the lifting movable body 70 is lowered as shown in FIG. 7, and the magnet 76 located at the lower side of the lifting movable body 70 is While descending along the guide hole 81, the distance from the hall sensor 33 is closer.

When the magnet 76 is close to the Hall sensor 33, the output value detected by the Hall sensor 33 is changed according to the distance, the output value of the Hall sensor 33 is a signal processing to the display unit of the control box 110 At this time, the Hall sensor 33 signal is detected as a waveform as shown in Figure 14, the amplitude is changed according to the size of the rotation torque, the number of waveforms during the unit time is changed according to the number of revolutions.

The number of waveforms is used as a detection signal of the rotational speed by amplifying and triggering signal processing, and the signal of amplitude is used as a torque value by amplifying and smoothing.

In the present invention, as the torque value applied to the torque control device 20 during use of the handpiece 10 increases, the compression distance of the spring 58 becomes longer as the moving angle of the rotatable movable body 60 moving in the direction of the arrow A increases. As the descending distance of the elevating movable body 70 increases, the distance between the magnet 76 and the hall sensor 33 becomes closer, and thus the torque value detected by the hall sensor 33 becomes larger.

At this time, the lowering of the lifting movable body 70, that is, the circular wound is raised by the magnet 76 is fitted to the lifting movable body 70 to be in close contact with the rotary movable body 60, which is located at the bottom of the lifting movable body 70 The guide plate 80 is made of a nonmagnetic material and does not prevent the lifting movable body 70 from rising.

By using the above principle, the torque value is measured according to the compression distance of the spring 58 and the distance between the magnet 76 and the hall sensor 33, thereby treating the dental treatment using the handpiece 10. By inputting the torque value to the control box 110 according to the purpose and use, if the torque value applied to the handpiece 10 during the use of the handpiece 10 reaches a set value, the operation of the driving motor is stopped to secure safety. As a result, more effective procedures can be performed.

(10)-Handpiece (20)-Torque Control
(30)-Main Body (31)-Cabinet
(32)-spinning rod (33)-hall sensor
(34)-Through Hole (35)-Tightening Piece
(40)-Housing (41)-Body
(42)-Storage Room (43)-Bearings
(44)-Rotating shaft (45)-Fastener
(46)-Tightening Pieces (50)-Stopper
(51)-A Short Pipe (52)-Public
(53)-Screwman (54)-Home
(55)-Fixed (56)-Space
(57)-single tube (58)-spring
(60)-Rotator (61)-Shaft Tube
(62)-groove (63)-turning piece
(64)-Reputation (65)-Seal
(66)-Axle (70)-Elevating Mobile
(71)-Through-Through (72)-Disc
(73)-Slope (74)-Stone
(75)-Inclined Groove (76)-Magnet
(80)-Guide (81)-Guide
(90)-Connection Socket (91)-Cover
(92)-support shaft (93)-screw
(94)-through-through

Claims (3)

Coupling the connecting socket 90 to the distal end of the main body 30, the drive motor is installed, and coupled to the connection socket 90, the conventional handpiece for the procedure by inserting a tool for the procedure to the contra angle In the construction, the rotating shaft rod 32 and the hall sensor 33 are formed in the storage chamber 31 at the distal end of the main body 30, and the torque control device 20 is installed in the storage chamber 31 to provide the handpiece. Torque can be measured and controlled, but the torque control device 20 is composed of a housing 40, a movable movable body 60 and a lifting movable body 70 provided with a magnet 76, the housing 40 ) And the spring 58 is elastically installed between the rotating movable body 60 and the spring 58 is compressed to change the rotation angle of the rotating movable body 60 according to the change in the torque value. The magnet 76 constructed on the lifting movable body 70 while the lifting movable body 70 moves up and down in accordance with the change of the rotation angle. It is characterized in that it is close to the Hall sensor 33, the magnet sensor 76 is configured to detect and control the torque value according to the distance to the Hall sensor 33 to measure and control Torque control device for dental handpiece using a contactless sensor. The rotary shaft 44 is formed on the upper surface of the housing 40, the rotary shaft 44 is positioned in the support shaft tube 92 of the connecting socket 90, and the stopper is disposed on the inner bottom surface of the housing 40. (50) and then fastening and fastening with the fastening piece 46, the stopper 50 constitutes the fixing piece 55 on both sides of the end pipe 51 formed with the through hole 52, the space therebetween The structure 56, the spring 58 is installed in the space 56, the rotatable movable body 60 is configured to project the rotating piece 63 on both sides of the upper end of the shaft tube 61, the rotating piece The 63 is positioned between the springs 58 provided in the space portion 56 of the stopper 50, and the plate 64 is formed under the rotating piece 63, and a plurality of rods under the plate 64. The inclined groove 75 having the inclined surface 73 is formed on the upper surface of the elevating movable body 70 positioned below the rotatable movable body 60, and is rotated in the inclined groove 75. The rod 65 is inserted into the lower end of the movable body 60 to be coupled to each other, so that the lifting movable body 70 is elevated according to the change of the rotation angle of the rotatable movable body 60. Torque control device for handpiece. According to claim 1 or 2, wherein the guide plate (80) in which the guide hole 81 is drilled in the lower end of the housing 40 to be fixedly installed in the fitting manner, the elevator to the guide hole 81 of the guide plate (80) Torque control device for a dental handpiece using a solid-state sensor, characterized in that the magnet (76) configured in the lower body of the fuselage (70) is fitted so as to be assembled.

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