KR100457615B1 - Apparatus for fastening ligature and bracket of orthodontic brace - Google Patents

Abstract

According to the present invention, there is provided a ligation device for ligation of the ligation wire used to secure the orthodontic wire to the bracket during orthodontic treatment. The ligation apparatus includes a forceps having legs that can be opened or retracted so that the ligation wire can be picked up, a first rotating shaft connected to the forceps, and a driving device for driving the first rotating shaft. The drive device includes a linear movement member and a transducer mechanism for converting the linear movement into a rotational movement. The drive device has a second rotary shaft that intersects the first rotary shaft, and each of the rotary shafts is provided with a member for transmitting rotational force between the shafts. The drive device has a torque limiter. The drive device has a one-way clutch. A button is provided to move the linear member. A cover covering at least a portion of the forceps and the rotating shaft is provided, and the front of the cover restrains the leg. The tongs, the front part of the rotating shaft, and the front part of the cover can be separated.

Description

Ligation device for orthodontic ligation wire {APPARATUS FOR FASTENING LIGATURE AND BRACKET OF ORTHODONTIC BRACE}

The present invention relates to a ligation device of a ligation wire for orthodontics, and to a ligation device for tying a ligation wire for fixing a correction wire to a orthodontic bracket.

Attach orthodontic brackets to each tooth and orthodontic wires on each bracket when orthodontics are corrected. The bracket has a joining piece, which has wings on both sides and a groove in the center. Insert the calibration wire into the center groove. Hold a thin wire on the blade and twist the wire to secure the orthodontic wire. This twisting wire is called ligation. The ligation wire exerts force on the tooth, and the energized tooth changes position or posture. This corrects the dentition.

Until now, the ligation method of the ligation wire has been twisted by a worker rotating the index finger on one ring of the ligation forceps. In such cases, however, it is inevitable to strain the wrist of the worker who turns the ligation forceps when the wire is bitten, removed or repeatedly worked.

In view of the matters required for the ligation apparatus as described above, an object of the present invention is to provide a ligation apparatus that can reliably bite a ligation wire and perform ligation work.

Another object of the present invention is to provide a ligation apparatus which is not connected to other devices of the dentist and improves mobility and workability.

Another object of the present invention is to provide a ligation apparatus that is easy to disinfect.

1 is a perspective view of a ligation device according to an embodiment of the present invention

FIG. 2 is an exploded perspective view of the ligation apparatus of FIG. 1, with the cover of the housing opened and partly disassembled.

Figure 3 is an exploded perspective view of the ligation portion provided in the ligation apparatus of Figure 1

FIG. 4 is a cross-sectional view of the ligation portion of the ligation apparatus of FIG. 1, showing a state in which tongs (collets) are inserted inward. FIG.

FIG. 5 is a cross-sectional view showing the ligation portion of the ligation apparatus of FIG. 1, showing a state in which a tong (collet) is brought forward. FIG.

6 is an exploded perspective view of a power transmission mechanism provided in the driving unit of the ligation apparatus of FIG.

7 is a side view showing a driving state between the rack and the pinion provided in the driving unit of the ligation apparatus of FIG.

FIG. 8 is a perspective view of the driving unit of the ligation apparatus of FIG. 1, as viewed from the gear wheel side; FIG.

9A, 9B, and 9C are respectively a perspective view, a front view, and a cross-sectional view taken along the line A-A, showing a part of a power transmission mechanism provided in the drive unit of the ligation apparatus of FIG.

10 (a) and (b) are perspective views showing a process of fixing the wire to the bracket with the ligation wire of FIG.

11A and 11B are perspective views of a ligation wire that can be used in the ligation apparatus of FIG.

12 is a perspective view showing a part of the housing and a part of the drive unit and the ligation unit to reveal the power transmission process of the ligation apparatus of FIG.

* Explanation of symbols for main parts of the drawings

DESCRIPTION OF SYMBOLS 10 Ligation apparatus 12 Ligation part 14 Drive part 16: Housing 26 Tongs

28: ligation rotation axis 30: cover 32: cover moving device 36: leg

37: taper portion 42: crown gear 86: drive mechanism 88: power transmission mechanism

90: linear moving member 98: rack 100: pinion 102: drive rotary shaft

104: one-way clutch 106: torque limiter

According to an aspect of the present invention, in the ligation device for ligation of the ligation wire used to fix the orthodontic wire to the bracket at the time of orthodontic teeth, a slit extending in the longitudinal direction so as to pick up the ligation wire is formed to open or pinch A tongs having a leg capable of being pulled up, a first rotating shaft connected to the tongs, a tongs storing cover member covering at least a portion of the tongs and movable along a longitudinal direction of the first rotating shaft, and the cover member. A ligating unit having a cover member moving device for moving along the longitudinal direction of the first rotating shaft, a driving unit having a driving device for driving the first rotating shaft, and supporting the first rotating shaft of the ligating unit, the cover And a housing to which the member moving device is coupled and the driving device is coupled, wherein the tongs are separated from the first rotation shaft. At least a portion of the cover member is exposed to the outside of the housing and is connected to the cover member moving device to be detachable with respect to the housing, and the leg of the tong is covered by one direction of movement of the cover member. A slot between the legs may be opened by being exposed to the outside of the member, and the leg enters the inside of the cover member by the opposite direction of movement of the cover member, and the slot between the legs is pinched to pick up the ligation wire. A ligation apparatus is provided.

The drive device includes a linear movement member and a transducer mechanism for converting the linear movement into a rotational movement. The drive device has a second rotary shaft that intersects the first rotary shaft, and each of the rotary shafts is provided with a member for transmitting rotational force between the shafts. The drive device has a torque limiter. The drive device has a one-way clutch. A button is provided to manually move the linear member. During the movement of the cover member covering at least a portion of the tongs, a tapered portion is provided at the portion of the leg that is exposed outside the cover member.

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, the ligation apparatus 10 according to the present invention includes a ligation part 12, a driving part 14, and a housing 16. The ligation unit 12 performs the ligation operation by picking up and rotating the ligation wire. The driving unit 14 generates and transmits power to rotate the ligation unit 12. The housing 16 incorporates these ligation parts 12 and the drive part 14. The ligation part 12 extends out of the housing 16 and extends long.

The housing 16 generally includes a body case 18, a body cover 20, a handle case 22, and a handle cover 24. In the circular body part case 18, the power transmission mechanism and the back of the ligation part 12 which are mentioned later of the drive part 14 are embedded. In the handle part case 22, the drive mechanism of the drive part 14 is located. The handle case 22 is fixed to the bottom of the body case 18.

2 to 5, the ligation part 12 includes a forceps 26, a ligation rotation shaft 28, a cover 30, and a cover moving device 32.

A tong 26, also called a collet, is located at the leading end of the ligation portion 12. The tongs 26 are generally circular in cross section and elongate. The tongs 26 are formed with slits 34 extending rearward from the tip and split into two legs 36 (which may be two or more). A hole 38 is formed at the end of the slit 34 to allow the leg 36 to be easily deformed. The part in which the leg 36 is formed forms the taper part 37 which becomes thicker toward the front end. The tip end of the tapered portion 37 is generally pointed. The inner surface of the cracked slit 34 makes a knurl (knurl) to increase the friction with the wire. A male screw is formed at the rear end of the tongs 26. The screw is one of the right hand screw and the left hand screw, and it will be understood by those skilled in the art that a screw in a direction that cannot be released by rotation can be determined.

The rotating shaft 28 is for transmitting power to the forceps 26. The rear end of the rotary shaft 28 extends inwardly of the body case 18 and is coupled to the bearing 40. The crown gear 42 is fixed to the middle portion of the rotation shaft 28. Crown gear 42 has a gear tooth formed at the rear. The bearing 44 is coupled to the front of the crown gear 42. This bearing 44 is coupled to a hole 45 formed in the front of the body case 18. The rotating shaft 28 is supported by the body case 18 by two bearings 40 and 44.

The rotating shaft 28 has a main body 29 and a connecting rod 46 coupled to the tip thereof. In order to couple the connecting rod 46 to the rotary shaft main body 29, a longitudinal hole is provided at the tip of the rotary shaft main body 29, and a female screw is formed therein. The rear end of the connecting rod 46 is provided with a male screw coupled with the female screw of the rotary shaft main body 29. A longitudinal hole is formed at the tip of the connecting rod 46 and a female screw is formed therein. This female screw is engaged with the male screw of the rear end of the tongs 26.

The cover 30 is generally elongate cylindrical. This cover 30 surrounds the front part of the rotating shaft 28 (part of the connecting rod) and the rear part of the tongs 26. The cover 30 has a front accommodating member 48 and a back connecting member 50. A male screw is formed at the rear of the receiving member 48 and a female screw is formed at the front of the connecting member 50 for coupling between the two. The taper portion 37 of the leg 36 of the forceps 26 is caught by the front inlet 52 of the housing member 48. The size of the inlet 52 may be such that the two legs 36 may be attached by biting the two legs 36 at any position of the tapered portion 37.

4 and 5, the two legs 36 of the forceps 26 remain open so that the ligation wire can enter therebetween when there is no external force. The relative position of the cover 30 and the tongs 26 is a position where the legs 36 of the tongs 26 are opened when the tapered portion 37 comes out of the receiving member 48 as shown in FIG. When the tongs 26 enter the receiving member 48 as shown in FIG. 4, the legs 36 of the tongs 26 are restrained and closed by the inlet 52 of the receiving member 48. At this time, the forceps 26 may bite the ligation wire 136.

2 to 5 again, the connection member 50 forms a locking jaw 56 by fixing the ring 54 at the rear. An elastic member 58 is positioned between the rear end of the connecting member 50 and the stop ring 57 at the portion where the bearing 44 of the rotary shaft 28 is fixed. The cover 30 is forced forward by the elastic member 58. The elastic member 58 is preferably a coil compression spring.

The cover moving device 32 includes a moving button 60 and a moving latch 62. The moving latch 62 is generally cylindrical, and has a coupling protrusion 64 extending downward. A locking jaw 66 is provided at the front of the inner hole of the moving latch 62. The locking jaw 66 and the locking jaw 56 of the rear connection member 50 are engaged with each other. Accordingly, when the movement latch 62 is moved backward, the connection member 50 and the storage member 48 connected thereto, that is, the cover 30 are pulled back.

The movement button 60 is coupled to the coupling protrusion 64 of the movement latch 62. The move button 60 has a guide rod 68 extending to the rear. The move button 60 is provided with a coupling flange 70 protruded forward. The coupling flange 70 and the coupling protrusion 64 are coupled to each other by a fastening member such as a screw. Guide block 72 is attached to the front lower portion of the body case 18. The guide block 72 is provided with a guide hole 74 into which the guide rod 68 is fitted.

A mounting member 76 for mounting the ligation portion 12 is fixed around the bearing hole 45, the front upper portion of the body case 18. The mounting member 76 is provided with a cylindrical body 78 and a flange 80 for fixing to the body case. The moving latch 62 is inserted into the cylindrical body 78. Guide grooves 82 are provided in the lower wall of the cylindrical body 78 so as to provide a space in which the engaging projection of the movement latch 62 can move. The coupling ring 84 is fixed to the front of the cylindrical body 78. A female screw is formed on the inner side of the coupling ring 84 for coupling between the two, and a male screw is formed on the front outer side of the cylindrical body 78.

The ligation part 12 is assembled as follows. First, the main body 29 of the rotary shaft 28 is inserted into the body case 18 to be coupled. And the mounting member 76 is fixed to the body case 18. The elastic member 58 is fitted to the front of the rotation shaft 28, and the connection member 50 is fitted. Assemble the moving latch 62 onto the connecting member. At this time, the engaging projection 64 enters the guide groove 82 below the cylindrical body 78. Then, the coupling ring 84 is assembled to the cylindrical body 78. Movement toward the front of the movement latch 62 is restricted by the coupling ring 84. The guide block 72 is fixed to the body case 18. The button 60 is inserted into the guide block 72, and the coupling flange 70 of the button 60 is fixed to the coupling protrusion 64. Thereafter, the connecting shaft 46 is coupled to the rotating shaft main body 29 to complete the rotating shaft 28. The cover 30 is completed by coupling the housing member 48 to the connection member 50. Thereafter, the button 60 is moved to couple the forceps 26 to the connecting rod 46 while the cover 30 is backed down. When the button 60 is released, the assembled state is completed as shown in FIG.

Although the assembly process of the fastening unit has been described above, the fastening unit of the ligation apparatus according to the present embodiment may be assembled through another process. After assembling the rotating shaft and the cover, it can be assembled. As shown in Figure 2, after assembling the guide member or the mounting block to the fastening portion may be fixed to the body case.

As illustrated in FIGS. 1 and 4, the tongs, a part of the rotating shaft, and a part of the cover may be separated in the assembled state. First, as shown in FIG. 5, the cover 30 is pulled back by pulling the move button 60 back. Then, the tongs 26 come out of the housing member 48 of the cover 30. At this time, turn the tongs 26 to separate the screwed. If the tongs are turned, the entire rotating shaft may rotate, making it difficult to remove. In view of this, it is preferable to provide a means for holding the rotating shaft such as, for example, a driver groove or a funnel, in a portion exposed through the bearing 40 at the rear end of the rotating shaft to the outside of the housing 16. . Then, by rotating the receiving member 48 of the cover 30 to remove the screwed. The connecting rod 46 of the rotary shaft 28 also separates the screwed. Parts such as tongs 26, receiving members 48, and connecting rods 46, which can enter the patient's mouth during operation, can be disinfected separately. Several tongs 26, receiving member 48, connecting rod 46 may be prepared by disinfection and alternately used.

2, 6-9, the drive part 14 is provided with the drive mechanism 86 and the power transmission mechanism 88. FIG. 2, 7, and 8, the drive mechanism 86 includes a linear moving member 90. As shown in FIG. The linear moving member 90 is embedded in the handle case 22. In the handle case 22, two guide rods 92 are traversed in the transverse direction. Holes are provided in the body of the linear movement member 90 extending in the vertical direction. Guide rods 92 are fitted into the holes. The rack 98 is provided in the upper part of the linear movement member 90. This rack 98 extends in the front-rear direction.

The linear movement member 90 is guided in the front and rear direction by the guide rod 92. The linear movement member 90 has a push button 94 protruding outside the case. When the pushbutton 94 is pressed with a finger, the linear movement member 90 moves backward. An elastic member 96 is installed at the rear of the linear movement member 90 to push the linear movement member 90 forward. When the finger is released from the push button 94, the linear member moves forward by the elastic member 96.

2, 6-9, the power transmission mechanism 88 is installed in the body case 18. As shown in FIG. The power transmission mechanism 88 includes a drive rotation shaft 102 in which the pinion 100 is provided, a one-way clutch 104, a torque limiter 106, and a gear in which the crown gear is engaged (a spur gear having a generally inclined tooth shape). Is provided with a gear wheel 108. The drive rotary shaft 102 rotates about a centerline in which the ligation-operated rotary shaft 28 extends in the vertical direction. The pinion 100 is provided at one side of the rotation shaft 102. This pinion 100 is combined with the rack 98 to convert a linear motion into a rotational motion. The bearing 110 is coupled to one end of the rotating shaft 102. The bearing 110 is coupled with the bearing cover 112, and the bearing cover 112 is fixed to the body cover 20.

The one-way clutch 104 is fitted to the other side of the rotary shaft 102 to be engaged. The one-way clutch 104 may be configured as a bearing that rotates in one direction but is fixed in the other direction. That is, when the linear movement device 90 is moved backward, the rotation between the rotating shaft 102 and the one-way clutch 104 is fixed, the rotation is transmitted to the next rotating member. When the linear movement device 90 returns to the front, even if the rotating shaft 102 rotates, the one-way clutch 104 acts like a normal bearing so that the rotational force is not transmitted to the next rotating member.

The intermediate ring member 116 is fitted onto the one-way clutch 104. The intermediate ring member 116 also functions as a cover of the one-way clutch and also functions as a part of the torque limiter described later. The bearing 118 is coupled to the intermediate ring member 116. The bearing 118 is fitted to the bearing cover 120. The bearing cover 120 is coupled to the body cover 18 with the space block 122 interposed therebetween. The rotating shaft 102 is supported by two bearings 110 and 118.

The torque limiter 106 has a limiter wheel 124. There is a hole in the center of the limiter wheel 124, the intermediate ring member 116 is fitted. The limiter wheel 124 is provided with a hole 126 that is radially drilled. The hole 128 is inserted into the ball 128, the elastic member 130, and the fixing member 132 sequentially from the inside. The ball 128 touches the intermediate ring member 116. Preferably, the intermediate ring member 116 is provided with a groove 134 in which a part of the ball 128 is seated. The elastic member 130 pushes the ball 128 toward the middle ring member 116. The fixing member 132 is provided with a male screw, and the female screw is provided at the inlet side of the hole 126. The fixing member 132 is fixed to the limiter wheel 124 by screwing the male screw and the female screw. When a torque of a predetermined magnitude or less is applied from the intermediate ring member 116, the ball 128 remains in the groove 134 to transmit the rotational force to the limiter wheel 124. When a torque of a predetermined magnitude or more is transmitted, the ball 128 exits the groove 134 and slides or rolls on the intermediate ring member 116. Therefore, no rotational force is transmitted and no rotation is transmitted to the limiter wheel 124. In the present embodiment it was described that the ball is seated in the groove. In another embodiment, the rotation force may be transmitted by the friction force to the limiter wheel without using a groove and may be a frictional force.

The limiter wheel 124 is fitted with an intermediate hole of the gear wheel 108. The gear wheel 108 meshes with the crown gear 42 installed on the ligation-operated rotary shaft 28 described above. By the gear wheel 108 and the crown gear 42, the rotational force is transmitted between two rotational axes 28, 102 which meet perpendicularly. The configuration of transmitting power between the two rotating shafts 28 and 102 that cross each other is not limited to the gear wheel and the crown gear. Other configurations, such as the configuration of the bevel gear or the friction difference, can also be applied.

Hereinafter, a process of ligating with the ligation apparatus 10 will be described with reference to FIGS. 1, 5, 10 (a) and (b), 11, and 12. First, referring to FIG. 11, the ligation wire used for ligation generally uses an annular ligation wire 136 that is twisted at the ends of the wire and bonded as shown in FIG. 11 (a). As shown in Fig. 11 (b), the ligation wire 138 without both ends combined may be used. Hereinafter, ligating using the ligation wire 136 shown in Fig. 11A will be described.

Referring to FIG. 5, when the move button 60 is pressed, the cover 30 moves back. Then, the tongs 26 are pulled out of the housing member 48 and the restraints of the legs 36 are released. The leg 36 is widened to fit the wire. The twisted portion 140 of the ligation wire 136 is inserted between the two legs 36. When the button 60 is released, the cover 30 comes forward by the action of the elastic member 58 and the leg 36 is restrained by the receiving member 48. The ligation wire 136 is tight between the legs 36.

Next, as shown in FIG. 10 (a), the grooves of the extension blades 148 of the bracket 144 attaching the lateral lines 142 of the annular ligation wires 136 to the teeth on which the correction wires 146 are placed. 149). In this state, when the drive button 60 is pressed, the linear movement member 90 moves. The movement of the rack 98 of the linearly movable member 90 is transmitted by the rotation of the pinion 100. It is again transmitted to the gear wheel 108 via the one-way clutch 104, the torque limiter 106. The rotation of the gear wheel 108 is transmitted to the rotation of the crown gear 42. The tongs 26 are rotated by the rotation of the rotary shaft 28, which in turn rotates the twisted portion 140 of the ligation wire 136. This process will be readily understood with reference to FIGS. 7, 8 and 12.

On the other hand, when the drive button 94 is released, the linear movement member 90 returns to the action of the elastic member 96. Also in this process, the driving rotary shaft 102 rotates, but only the rotary shaft 102 rotates by the action of the one-way clutch 104. Therefore, even if the push button 94 is repeatedly pressed and released, the ligation rotation axis 102 rotates only in one direction.

Pressing the push button 94 once or several times, the ligation wire 136 is reduced in size of the ring to secure the bracket 144 and the wire 146. Once the wire 146 is secured to not move, the ligation wire 136 can no longer be stranded. Then, the limiter wheel 124 of the torque limiter 106 also becomes impossible to rotate. Even in this state, when the push button 94 is pressed, the ball overcomes the force of the coil compression spring elastic member 130 and leaves the groove 134 of the intermediate ring member 116. Then, the ball slides or rolls over the circumferential surface of the intermediate ring member 116 and the rotational force of the rotational shaft 102 is not transmitted.

After the ligation is completed completely, the moving button 60 is pressed to move the cover 48 so that the two legs 36 of the tongs 26 are separated. Then, the ligation apparatus 10 and the ligation wire are isolate | separated.

In the above embodiment has been described as having a drive unit for rotating the ligation operation rotary shaft manually connected to the forceps, but the present invention is not limited thereto. The electric drive device may be used as a drive unit by connecting the rotary shaft of the electric drive device to the ligation operation rotation axis. The electric drive device may be, for example, a drive device composed of a stepping motor, a drive device composed of a motor and a reduction gear, and the like. If the drive is driven by a battery, good mobility and workability are also ensured. As a driving device, a pneumatic motor or a hydraulic motor can also be used.

As described above, the present invention solves the inconveniences that may occur when a dentist orthodontic treatment to the patient. First, the ligation apparatus of this invention can perform ligation work by reliably biting ligation wire. It is compact and not connected to other devices of the dentist, improving mobility and workability. The ligation of the ligation wire, that is, the coupling and separation of the ligation wire, and the rotational driving of the ligation wire are all operated with a button. Since the ligation apparatus of this invention has a torque limiter and a one-way clutch, power transmission is assured. The ligation device of the present invention can be easily removed from the front portion is easy to disinfect the instrument.

Although the present invention has been described with reference to the above embodiments, the present invention is not limited to the above embodiments. It will be apparent to those skilled in the art that modifications may be made to the above embodiments without departing from the spirit and scope of the invention as set forth in the claims, and that such modifications also fall within the scope of the invention.

Claims (10)

In the ligation device for ligation of the ligation wire used to fix the orthodontic wire to the bracket during orthodontic teeth, A forceps having a slit extending in the longitudinal direction to pick up the ligation wire and having legs capable of being spread or retracted; a first rotating shaft connected to the forceps; and the first rotating shaft covering at least a portion of the forceps. A ligation part including a forceps storing cover member movable along a longitudinal direction of the cover member, and a cover member moving device for moving the cover member along the longitudinal direction of the first rotating shaft; A driving unit having a driving device for driving the first rotating shaft; And a housing for supporting the first rotation shaft of the ligation part and having the cover member moving device coupled thereto and the driving device coupled thereto. The tongs are detachably connected from the first axis of rotation, At least a portion of the cover member is exposed to the outside of the housing and connected to the cover member moving device to be detachable with respect to the housing, The legs of the tongs may be exposed to the outside of the cover member by the movement of the cover member in one direction, and the slots between the legs may be opened, and the legs may be moved into the cover member by the opposite movement of the cover member. And a slot between the legs is retracted to pick up the ligation wire. The method of claim 1, The driving device is a ligation device having a linear member and a converter for converting the linear movement into a rotational movement. 2. The ligation apparatus according to claim 1, wherein the drive device has a second rotational axis intersecting the first rotational axis, and each rotational axis is provided with a member for transmitting rotational force between the axes. The ligation apparatus according to any one of claims 1 to 3, wherein the drive device is provided with a torque limiter. The ligation device according to any one of claims 1 to 3, wherein the drive device is provided with a one-way clutch. 4. The ligation apparatus according to claim 2 or 3, wherein a button is provided to manually move the linear member. The ligation according to any one of claims 1 to 3, wherein a tapered portion is provided at a portion of the leg exposed to the outside of the cover member during movement of the cover member covering at least a portion of the tongs. Device. delete The ligation apparatus according to claim 1, wherein the driving device for driving the first rotary shaft is an electric driving device. The ligation apparatus of claim 1, wherein the driving device for driving the first rotary shaft is a hydraulic or pneumatic driving device.