KR100328735B1 - Drill and driver for using in mandibular angle fracture - Google Patents

Abstract

The present invention has been conceived for the purpose of newly presenting a drill and a driver to allow the fixing of the metal piece of the mandibular fracture by utilizing the space obtained by the mandibular lateral incision handle 20 and the power unit 10 is formed therein and A working shaft formed inside the head having a neck portion 30 protruding in contact with the handle, a head 40 bent at a predetermined angle with respect to the neck portion, and a tip insertion opening 51 into which a screw or a drill tip is inserted; 50, and a power connection device 60 for transmitting the power unit 10 inside the handle to the working shaft 50, the manual rotating device 70 for manually rotating the working shaft, and the handle The present invention proposes a drill and a driver configured to freely replace a high speed rotating power (a) and a low speed rotating power (b) by configuring a removable power unit.

According to the present invention, the drilling and screw fixing work is performed using the space obtained from the incision of the mandibular angle without external incision, thereby reducing the surgical effort and time compared to the conventional screw fixation, and fixing the screw firmly and precisely. It can have such an effect.

Description

DRILL AND DRIVER FOR USING IN MANDIBULAR ANGLE FRACTURE}

The present invention relates to a drill and a driver used for screw fixation during mandibular fracture in the oral cavity, and in detail, by inserting a drill tip or a screw on the rotating axis to form a substantially perpendicular to the direction of movement of the handle to the fracture of the mandibular angle It relates to a drill and a screwdriver for drilling, screwing and fixing with a metal plate.

Various surgical instruments such as mandibular retractors or cutters, fasteners for fixing metal plates, drills for drilling fractures, and drivers for screwing metal plates to fractures are used to fix them during mandibular fractures or surgery. The present invention relates to a surgical instrument that can be used as a drill or a driver to solve various inconveniences of the conventional drill or driver.

In other words, in order to fix and fix the metal plate on the fracture portion of the mandibular angle, a separate type of drill and driver are used. Most of these drills and drivers use a drill or driver coupled to the working shaft formed in the same direction as the handle. Although some of the working shafts are formed to have a fixed angle with the handle, they are considered to have a thickness of about 15 mm due to the configuration of the connecting device for transmitting power to the working shaft, so that the drill tip or the screw length may be considered. In the case of 25mm thick, it is difficult to operate by oral insertion using a space (approximately 20mm) obtained from the incision of the mandibular side, which is cut in order to fix the fracture, and inevitably separate the face part separately from the mandibular incision. Insert a screwdriver through the incision Is being used in a way.

Therefore, the drill or driver 112 must be inserted by applying a separate incision 111 to the outside, thereby increasing the surgical effort and time, and the long-term healing period according to the recovery. As the operation efficiency decreases due to the work in the side incision and the external incision), a screw having a different fixation direction must be inserted through a single skin incision. As shown in FIG. It does not form a right angle with the bevel is formed or inserted into the screw is not secure and has a problem that is not accurate.

In addition, the drill and the driver required for the operation of fixing the metal piece to the fracture is a driver that requires a low speed rotation due to its operation characteristics, and the drill or a drill that requires a high speed rotation are manufactured separately as a separate component driver or drill There was an inconvenience and economic burden to be provided separately.

The present invention is intended to solve the problems caused by the external incision by allowing the insertion and operation of the drill and driver through the space obtained from the intraoral incision without external incision, and to be able to mix the drill and the driver.

To this end, the present invention forms a final working shaft to form an angle of about 90 degrees with respect to the handle direction and is configured to be used by inserting a screw or a drill tip on the working shaft, the connection device for connecting the power to the working shaft is as slim as possible By minimizing the volume of the head part, the head part can be freely made in the space obtained from the mandibular side incision, thereby newly presenting a drill and a driver that can fix the mandibular screw fixation by oral insertion without external incision.

Hereinafter, described in detail by the accompanying drawings as follows.

1 is a basic configuration of the present invention

Figure 2 is a side view of the present invention

3 is a configuration diagram of a power unit

Figures 4a and 4b is a state diagram coupled to the power unit when used as a drill

5 is a coupling state of the power unit when using as a driver

6a and 6b show an embodiment of the power connection device

7 is a detailed structural diagram of the head of FIG. 6B

8A and 8B show an embodiment of a manual operation device

9 is a use state diagram of the present invention

10 is a state diagram used in the conventional drill or driver

* Description of the major symbols

10. Power unit 11.Reduction motor 11a.Reduction motor shaft

20.Handle 21.Front Handle 22.Rear Handle

23 Screw 30 Neck 40 Head

50.Action Shaft 51.Tip Insertion Hole 60.Power Coupling Device

61. Power coupling shaft 62. Gear element 62a. Final rotary shaft

62b.62c. Belt pulley 62d. Spur gear 62e. Head gear element

63.Belt 64.Bearing 65.Connection Shaft

70. Torque limiter 71. Torque limiter axis 72. Slider axis

73. Spring 80. Manual override 81. Lever

82 Groove 83 Shaft 83 a.

84.Spring 100.Drill tip 101.Screw

1 and 2 illustrate the basic configuration of the present invention, the present invention is a handle 20, the power unit 10 is formed therein, a neck portion 30 protruding in contact with the handle and the neck portion The working shaft 50 is formed inside the head having a head 40 bent at a predetermined angle with respect to the head, a tip insertion opening 51 into which a screw or a drill tip is inserted, and a power device 10 inside the handle. It consists of a power connection device 60 for transmitting to the 50, the manual rotation device 70 for manually rotating the working shaft, and the power device inside the handle to be removable to form a high-speed rotary power (a) and And a configuration in which the low speed rotating power (b) can be freely replaced.

The power unit is a device for rotating the drill tip 100 or the screw 101 by the electric motor is composed of a motor and a reduction gear, or composed of a reduction motor 11 in which the reducer and the motor are integrally combined, and rotates at high speed according to the reduction ratio. It is divided into power and low-speed rotational power, it is configured to switch the rotation direction by the forward and reverse rotation switch 12.

Meanwhile, the present invention divides the handle 20 into a front handle 21 and a rear handle 22 so as to be mutually coupled, and a power unit to replace the high speed rotational power and the low speed rotational power in the rear handle 22. Includes the configuration of.

That is, as shown in FIG. 3, the handle 20 is divided into front and rear portions so as to be mutually coupled by means of a screw 23, and the like, and a power unit is formed inside the rear handle. The power unit formed in the high speed rotation power (a) and low speed rotation power (b) is configured to be replaced as necessary.

High-speed rotational power (a) is to obtain the speed required for drilling when using as a drill as shown in Figure 4 when the reduction motor shaft (11a) slightly protrudes from the rear handle 22 when the rear handle is coupled to the front handle It has a configuration connected to the power connector shaft 61 to be described later.

The connection part of the power connecting device shaft and the reduction motor shaft is composed of a square fitting part by the unevenness, and when the rear handle and the front handgrip are combined, the uneven fitting portion is combined so that the power is connected.

5A and 5B, the low speed rotational power b has a configuration in which the torque limiting device 70 is coupled together so as to maintain a constant tightening force by using a combination when used as a driver.

The torque limiting device is a device that automatically disconnects power when the screw tightening pressure transmitted from the working shaft 50 of the head 40 becomes over a certain level, and can be implemented in various forms, and the tightening pressure of the screw is excessively large. It acts to prevent the crushing of bone tissue caused as.

Figure 5b shows an embodiment of the torque limiter 70, a torque limiter shaft 71 coupled to the power connector shaft 61 and protrudes from the rear handle and the reduction motor shaft connected to the reduction motor ( A separate sliding shaft 72 is formed between 11a) and the sliding shaft 72 is inserted into the reduction motor shaft 11a so as to receive the spring force of the spring 73, and the torque limiter shaft 71 slides. The contact portion of the shaft 72 has a configuration in which disc-shaped disks 71a and 72a are formed. When the tightening pressure of the screw becomes larger than the spring pressure, the shaft 72 is moved so that the power of the power unit is boiled.

The neck part 30 is an outer case of the power connector, which protects the power connector and extends the working shaft of the head from the handle to form a cylindrical or rectangular cross-sectional shape. Is installed.

Head 40 is an element forming the end of the neck is formed with a working shaft 50 coupled to the power connection therein, and has a structure bent to form an angle of 15-25 ° with respect to the neck.

The bending angle given to the head is such that the drill tip or the driver makes an angle of about 90 ° with respect to the moving direction of the handle, and thus is configured so that the approaching direction of the handle and the working direction of the head regardless of the curved surface of the bone surface By appropriately adjusting it, you can drill or screw at right angles to the bone surface.

The head portion is directly inserted into the incision in the oral cavity and is active to limit the thickness of about 6-7mm to allow free activity in the mandibular lateral incision space.

In other words, when exposing the mandibular side surface by intraoral incision, the maximum space that can be secured is usually about 20mm from the bone surface, and the thickness of the bone to be drilled is about 8-9mm. Is about 10mm, and the thickness of the head portion should be about 6-7mm to be able to freely work in the incision on the side of the mandibular angle, it is necessary to limit the thickness of the head within about 6-7mm, the power connector as described below Embodiments can satisfy these requirements.

The working shaft 50 receives the power from the power unit by the connecting device and rotates in a state in which the drill tip or the screw is coupled, so that the drill tip or the screw can be inserted into the lower part. Tip insert 51 is formed and has a configuration that is coupled to the power connector in the head.

The power connecting device 60 is a component that transmits the power of the power device to the working shaft 50 as the final acting portion, and combines a belt or a shaft element to minimize the thickness of the head and neck so that the activity in a narrow space is free. Has

6A shows an example of the configuration of the power coupling device by the belt 63. The belt pulley 62b is formed on the final rotational axis 62a of the gear element 62 coupled to the power coupling shaft 61, and the head The belt pulley 62c is formed in the working shaft 50 formed in the part, and it has a structure which connects both belt pulleys with the belt 63. FIG.

The gear element 62 is composed of a bevel gear formed on the power connecting shaft 61 and the final rotating shaft 62a to be engaged with each other so that the rotational force from the power unit rotates the power connecting shaft 61. By rotating the engaged final rotational shaft 62a, it is configured to rotate the acting portion working shaft connected by the belt.

The power connection device includes a configuration in which a separate bearing 64 is formed at the bent portion of the head so that the belt is in contact with the bearing, thereby preventing the lowering of the grip force due to the bending of the belt at the bent portion.

6B shows a configuration example of the power connecting device by the connecting shaft 65. The gear is formed on the final rotating shaft 62a of the gear element 62 coupled to the power connecting device shaft 61 to form a connecting shaft ( And a gear gear 62d formed on the working shaft formed in the head portion so as to engage with the gear element 62e coupled to the end of the connecting shaft.

The gear element coupled to the power coupling shaft is engaged with the end of the power coupling shaft 61 and the final rotating shaft 62a by the bevel gear, and the bevel gear formed on the final rotating shaft is the bevel gear formed on the connecting shaft 65. And a rotational force of the power unit to be transmitted to the connecting shaft.

The gear element 62e formed in the head portion is a gear element for transmitting the rotational force of the connecting shaft 65 to the working shaft which is the final acting portion, as shown in FIG. 7, and a bevel gear formed at the end of the connecting shaft 65. Consists of a series of bevel gears and a series of spur gears that mesh with each other.

An example of the configuration of the connecting device is to minimize the volume at the head which is the final acting part, and to correct the inclination angle added to the handle and the neck, the neck and the head, and to the power connecting device according to another form, for example, the reduction motor shaft. It can be implemented in various forms, such as the configuration of correcting the inclination angle of the neck and the head by connecting the connecting shaft directly and combining the bevel gear and the spur gear element in the working part, or the configuration of correcting the inclination angle using a chain-shaped connecting shaft.

The manual rotating device 80 is a wheel type lever 81 connected to the power connecting device as a device that is provided by a power of a power connecting device when a predetermined or higher tightening pressure is used when the driver is used as a driver and is used when tightening by a final finishing or manual. And the lever is configured to be connected to the power connecting device only when necessary.

Figure 8a shows an embodiment of a manual rotary device that can be applied to the present invention to form a square groove 82 in the final rotation axis 62a constituting the power connection device and to the center of the lever to fit the groove When the lever 81 is rotated as the square shaft 83 is formed, the final rotary shaft 62a rotates together to rotate the working shaft of the operating part, thereby manually rotating the screw inserted into the tip insertion hole of the working shaft.

Since the wheel-type lever is easily separated and coupled from the final rotary shaft, the wheel-type lever may be used after being separated from the final rotary shaft and used only in manual operation.

On the other hand, the wheel-type lever can be configured to be connected to the power connector only during manual operation in a state in which the wheel-type lever is always connected. For this purpose, as shown in FIG. Fixed to receive a resilience force and formed a fitting portion (83a) at the end of the lever shaft 83 to be coupled to the square groove 82 on the final rotary shaft is configured so that the groove formed on the alignment and the final rotary shaft only while pressing the lever do.

In the above configuration, the spring's elastic force acts, and the connection between the lever and the power connecting device is cut off, so that the wheel type lever does not rotate even when the final rotating shaft is rotated by the power unit. As the shaft rotates, it can be manually tightened or loosened.

The manual rotating device serves to prevent damage to the screw or damage to the bone tissue caused by the screw tightened together with the torque limiting device.

9 is a view illustrating a screw fixation state according to the present invention. The side surface 103 of the mandibular angle 102 is cut through the oral cavity so that the head is positioned in the space 105 obtained by forming the incision 104. It shows the state of drilling using a drill tip around the fracture portion 106 and fastening the screw to the metal plate 107.

The space obtained through the lateral incision of the mandible angle is about 20mm, and in the present invention, since the head thickness is limited to within 7mm, even in consideration of the length of the screw or drill tip, the free activity in the space is ensured as about 17mm.

On the other hand, the head portion is bent in the range of 15-25 ° with respect to the neck or the handle, and slightly shifts the approach direction of the handle when drilling or tightening the screw, thereby making the drill tip or screw approach the bone surface in a limited space. It can be maintained at a right angle.

The present invention by the above configuration as a surgical instrument to enable a new type of surgery to perform the screw fixation of the fracture through the lateral incision of the mandibular angle can reduce the surgical effort and operation time, it is possible to shorten the recovery time after surgery In addition, by replacing only the power unit has a number of advantages that can be used as a drill or screwdriver.

The present invention can solve the problems caused by the external incision by allowing the insertion of the drill and driver through the space obtained from the intraoral incision without external incision, the bone at an angle of about 90 ° relative to the approach direction of the handle As the surface is contacted with the head, the drilling and screwing are done at right angles to the bone surface, so the screw fixing part is precise and solid, and the screw is tightened at the proper tightening pressure by the torque limiting device or the manual operation device. It will have the effect of preventing damage to the bone tissue.

In addition, the present invention has the advantage that the drill and driver can be mixed by being configured to replace the power unit.

Claims (7)

A handle 20 having a power unit 10 formed therein, a neck portion 30 protruding in contact with the handle, a head 40 bent at an angle with respect to the neck portion, and a screw or a drill tip inserted therein. The mandrel side approach consists of a working shaft 50 having a tip insertion opening 51 formed inside the head, and a power connecting device 60 for transmitting the power unit 10 inside the handle to the working shaft 50. Possible intraoral surgical drills and drivers. According to claim 1, wherein the head is bent 15-25 ° with respect to the neck, it is formed to have a thickness of about 7mm around the mandible side oral surgery drill and driver. The method of claim 1, wherein the handle 20 is divided into front and rear parts 21 and 22 so as to be coupled to each other, and the high-speed rotational power (a) and the low-speed rotational power (b) are separately provided inside the rear handle. Formed by replacing the rear handle by using a high-speed rotational power (a) and a low-speed rotational power (b) can be used for intraoral surgical drills and drivers for lateral access. The torque limiting device 70 of claim 3, wherein the torque limiting device 70 is configured to automatically disconnect the power when the screw tightening pressure transmitted from the working shaft 50 of the head 40 is greater than or equal to the low speed rotation power b. Intra-oral surgical drill and driver capable of mandibular side access, characterized in that it comprises a. 4. A power linkage according to any one of the preceding claims, wherein the power linkage attaches the belt pulley (62b) to the final axis of rotation (62a) of the gear element (62) coupled to the power linkage shaft (61). Forming and forming a belt pulley (62c) on the working shaft 50 formed in the head portion to connect both belt pulleys with the belt 63, characterized in that the mandibular side approach is possible oral surgery drill and driver . 4. The connecting shaft according to any one of claims 1, 2 or 3, wherein the power connecting device forms a gear on the final rotational shaft 62a of the gear element 62 that is coupled to the power connecting shaft 61. And gears 62d engaged with gears formed at the ends of the gears 65 and spur gears 62d formed on the working shafts formed in the head portion. Intra-oral surgery drill and screwdriver capable of mandibular side access. According to any one of claims 1, 2 or 3, the square shaft (82) is formed in the center of the lever to form a square groove (82) on the final rotational axis (62a) constituting the power coupling device (4) 83) formed by the lever 81 to rotate the final rotary shaft 62a is rotated together to include a manual rotary device configured to rotate the working shaft of the operating portion, characterized in that the mandible side access is possible oral My surgical drill and screwdriver.