Rotary surgical cutting tools and related accessories

Abstract

To provide a surgical handpiece system having a high-speed surgical bur assembly.SOLUTION: A surgical handpiece system 10 includes a high-speed surgical bur assembly and a surgical handpiece assembly. The high-speed surgical bur assembly has a nose tube 17 and a driveshaft 24 at least partially disposed within the nose tube 17. A cutting tool 18 is coupled to a distal region of the driveshaft 24. The cutting tool 18 and the driveshaft 24 are configured to rotate relative to the nose tube 17. The surgical handpiece system 10 comprises a hub 14 and a rotatable drive chuck 34 for coupling to the nose tube 17 and the driveshaft 24. A motor is configured to rotate the rotatable drive chuck 34, the driveshaft 24, and the cutting tool 18 when the driveshaft 24 is coupled to the rotatable drive chuck 34.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] Related Application The present application claims the priority and all benefits of U.S. Provisional Patent Application No. 62 / 857,959 filed on June 6, 2019, which is incorporated herein by reference in its entirety, and Provisional Patent Application No. 62 / 972,354 filed on February 10, 2020 . [Background Art]

[0002] High-speed burs often include a motor and a separate disposable component. The disposable component must be coupled to the motor such that torque is transmitted from the motor via a drive shaft to rotate the cutting bur at high speed to abrade and / or wear a surface. Improving this coupling is the object of the present disclosure. [Summary of Invention]

[0003] The present disclosure generally relates to surgical handpiece systems. Exemplary configurations provide a surgical handpiece system having a high-speed surgical bur assembly. The high-speed surgical bur assembly includes a nose tube defining a lumen extending between a proximal end and a distal end of the nose tube. The nose tube has a proximal portion extending along an axis. The proximal portion of the nose tube has an outer surface defining a nose tube recess. The nose tube also includes a protrusion disposed proximal to the nose tube recess. The high-speed surgical bur assembly also includes a drive shaft disposed at least partially within the lumen of the nose tube and configured to rotate relative to the nose tube. In the high-speed surgical bur assembly, the distal end of the drive shaft ​​​​​​​​​​​This also includes cutting tools coupled to the region. The cutting tool is driven by the nose tube. It is configured to rotate together with the shaft. This system is also a high-speed surgical burr. A hub having a bore that defines a cavity for receiving the proximal portion of the nose tube of the hub. Includes a surgical handpiece assembly. The surgical handpiece assembly also includes Includes a biasing member positioned within the cavity of the hub. The biasing member provides high-speed resistance to the hub within the cavity of the hub. To control the depth of the nose tube of a surgical bar assembly, the nose tube It is configured to be received by a recessed tube. Surgical handpiece assembly The biasing member also includes a radially aligning member positioned within the cavity of the hub proximal to the biasing member. The alignment member has protrusions to suppress the radial orientation of the nose tube relative to the hub. Define the notch for acceptance.

[0004] Another exemplary configuration is a surgical handpiece system including a high-speed surgical bur assembly. Provided. The high-speed surgical bur assembly extends between the proximal and distal ends of the nose tube. It includes a nose tube that defines the lumen. The high-speed surgical bar assembly also includes at least It is partially positioned within the lumen of the nose tube and is configured to rotate relative to the nose tube. Includes the constructed drive shaft. The drive shaft has a proximal region extending along the drive shaft axis. It has a cutting machine coupled to the distal region of the drive shaft. The components are also included. The cutting tool rotates with the drive shaft relative to the nose tube. This system is configured as follows. This system also includes a nose tube for a high-speed surgical bar assembly. It has a bore that defines a cavity for receiving the proximal end and the proximal region of the drive shaft. Includes a surgical handpiece assembly including a hub. The surgical handpiece assembly also It includes a rotatable drive chuck configured to rotate around the hub axis by a motor. The rotatable drive chuck is positioned within the hub cavity and rotates relative to the hub. It is configured such that the rotatable drive chuck accepts the proximal region of the drive shaft. The opening is defined. The rotatable drive chuck includes a drive part located near the opening. The drive unit engages with the drive shaft in the drive direction in order to rotate the drive shaft. It has at least two drive surfaces configured as follows. The rotatable drive chuck is also rotatable The drive chuck includes an alignment section positioned between the drive part and the opening. The alignment section rotates Extending distally from the drive portion of the rotatable drive chuck toward the opening of the rotatable drive chuck It has an aligned edge. The aligned edge extends distally from the drive portion of the rotatable drive chuck. The aligned edges taper away from the hub axis. The drive shaft is a rotatable drive chuck. The drive shaft engages with the alignment edge of the alignment portion, and a small portion of the drive chuck's drive portion is rotatable. The drive shaft is configured to be oriented in the driving direction so as to engage with at least two drive surfaces. It can be done.

[0005] Yet another exemplary configuration involves cutting tissue and connecting it to a surgical handpiece assembly. The high-speed surgical bur assembly is provided as configured to perform the following: , including a nose tube that defines a lumen extending between the proximal and distal ends of the nose tube. The nose tube has a proximal portion that extends along the axis. In order to restrict the depth of the nose tube relative to the surgical handpiece assembly, having an outer surface defining a recess for receiving a biasing member of the surgical handpiece assembly. The nose tube includes a protrusion disposed proximal to the recess. The protrusion is configured to restrict the radial orientation of the nose tube relative to the surgical handpiece assembly. The high-speed surgical bur assembly also includes a drive shaft disposed at least partially within the lumen of the nose tube and configured to rotate relative to the nose tube. The drive shaft has a drive portion at a proximal region of the drive shaft for engaging with a rotatable drive chuck of the surgical handpiece assembly. The high-speed surgical bur assembly also includes a cutting tool coupled to a distal region of the drive shaft opposite the drive portion. The cutting tool is configured to rotate together with the drive shaft relative to the nose tube in response to rotation of the rotatable drive chuck of the surgical handpiece assembly. configured to rotate with the drive shaft relative to the nose tube.

[0006] Another exemplary configuration provides a high-speed surgical bur assembly configured to cut tissue and be coupled to a surgical handpiece assembly. The high-speed surgical bur assembly includes a nose tube defining a lumen extending between a proximal end and a distal end of the nose tube. The nose tube has a proximal portion configured to be coupled to the surgical handpiece assembly. The proximal portion of the nose tube includes a protrusion configured to restrict radial orientation of the nose tube relative to the surgical handpiece assembly. The high-speed surgical bur assembly also includes a drive shaft disposed at least partially within the lumen of the nose tube and configured to rotate relative to the nose tube. The drive shaft extends along an axis including the drive shaft configured to rotate relative to the nose tube. The drive shaft extends along an axis has a proximal region. The proximal region of the drive shaft rotates the surgical handpiece assembly includes a drive portion for engaging a possible drive chuck in a driving direction. The drive shaft also includes an alignment portion proximal to the drive portion of the drive shaft. The alignment portion has an outer surface that tapers toward the axis as the alignment portion extends from the drive portion to the proximal end of the drive shaft. The alignmen t portion is engaged with the rotatable drive chuck such that the drive portion of the drive shaft can rotatably drive and is configured to align the drive portion in the driving direction for engagement with the drive chuck. The alignment portion is rotatable with the alignment portion of the drive shaft while the alignment portion is engaged with the rotatable drive chuck and extends distally from the proximal end of the drive shaft to reduce contact between the drive chuck and the alignment portion defining a notch. The high-speed surgical bur assembly also opposes the proximal region of the drive shaft includes a cutting tool coupled to a distal region of the drive shaft on the side. The cutting tool is configured for surgical handpie driven relative to the nose tube in response to rotation of the rotatable drive chuck of the base assembly configured to rotate together with the shaft.

[0007] Yet another exemplary configuration provides a high-speed surgical bur assembly for connection to a surgical handpiece assembly. The high-speed surgical bur assembly has a proximal end and a distal end includes a drive shaft. The high-speed surgical bur assembly also includes a drive between the proximal end and the distal end a nose having a first region defining a lumen for at least partially receiving the shaft including a tube. The high-speed surgical bur assembly also connects the drive shaft at the proximal end to a surgical h a second region monolithically extending from the first region for coupling to the handpiece assembly including. The second region radially aligns the nose tube with the surgical handpiece assembly Includes an alignment function configured in a row. The second area also includes a nose tube for surgical use. Includes a retaining mechanism configured to hold the endpiece assembly axially. For high-speed surgery. The bar assembly also includes a cutting tool coupled to the drive shaft at the distal end of the drive shaft. nothing.

[0008] Another exemplary configuration includes a nose tube and a drive rotatably coupled to the nose tube. A surgical bar configured to be coupled to a high-speed surgical bar assembly having a movable shaft. We provide handpiece assemblies. Surgical handpiece assemblies are located near the nose tube. Includes a hub having a bore that defines a cavity for receiving a part. Surgical handpiece The assembly also includes a biasing member located within the hub cavity. The biasing member is located within the nose tube. It engages with the hub and is configured to restrict the depth of the nose tube within the hub cavity relative to the hub. The surgical handpiece assembly is also positioned within the cavity of the proximal hub of the biasing member. Includes a radially aligned member. The radially aligned member receives the projection of the nose tube. A notch is defined to suppress the radial orientation of the nose tube relative to the hub. The radial alignment member is designed so that the notch can receive the projection of the nose tube. The notch engages with the projection on the nose tube and positions the nose tube radially. It has aligned walls that extend distally.

[0009] The advantages of this disclosure, when considered in relation to the attached drawings, should be referred to in the following detailed description. This will lead to a better understanding of the same thing, and therefore it will be easily recognized. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view of a surgical handpiece system including a hub coupled to a nose tube assembly. [Figure 2] This is a cross-sectional view of the nose tube assembly coupled to the hub, taken along line 2-2 in Figure 1. [Figure 3] This is a partial cross-sectional view of the proximal end of the nose tube assembly connected to the hub, taken along line 3-3 in Figure 1. [Figure 4] This is an exploded perspective view of the proximal end, hub, and surgical handpiece of the nose tube assembly. [Figure 5] A perspective view of a portion of the nose tube assembly. [Figure 6] This is a perspective view of a portion of the nose tube assembly, positioned for insertion into the hub collet. [Figure 7] This is a perspective view of the proximal portion of the drive shaft in the nose tube assembly. [Figure 8] This is a front view of the alignment section of the drive shaft. [Figure 9] This is a perspective view of another configuration of a surgical handpiece system. [Figure 10] Figure 9 is a perspective view of the high-speed surgical bur assembly of the surgical handpiece system. [Figure 11] This is a cross-sectional view of the high-speed surgical bur assembly shown in Figure 10, taken along lines 11-11 in Figure 10. [Figure 12] Figure 10 is an elevation view of the proximal portion of the high-speed surgical bur assembly. [Figure 13] Figure 10 is a perspective view of the proximal region of the drive shaft of a high-speed surgical bur assembly. [Figure 14] Figure 9 is a perspective view of the surgical handpiece assembly of the surgical handpiece system. [Figure 15] Figure 14 is an exploded view of a surgical handpiece assembly. [Figure 16] This is a cross-sectional view of the surgical handpiece assembly shown in Figure 14, taken along lines 16-16 in Figure 14. [Figure 17] Figure 9 is a partial cross-sectional view of the surgical handpiece system. [Figure 18] Figure 14 is a perspective view of the radial alignment member of a surgical handpiece assembly. [Figure 19] Figure 14 is a plan view of the radial alignment member of the surgical handpiece assembly. [Figure 20] Figure 14 shows a detailed cross-sectional view of the surgical handpiece assembly before the high-speed surgical bur assembly is inserted into the cavity of the surgical handpiece assembly hub. [Figure 21] Figure 14 is a detailed cross-sectional view of a surgical handpiece assembly, showing a high-speed surgical bur assembly partially inserted into the cavity of the hub of the surgical handpiece assembly. [Figure 22] Figure 14 is a detailed cross-sectional view of the surgical handpiece assembly, showing the high-speed surgical bur assembly fully inserted into the cavity of the hub of the surgical handpiece assembly. [Figure 23] Figure 14 is a perspective view of the rotatable drive chuck of a surgical handpiece assembly. [Figure 24] This is a perspective cross-sectional view of the rotatable drive chuck of Figure 23, taken along line 24-24 in Figure 24. [Figure 25] Figure 23 is a plan view of the rotatable drive chuck. [Figure 26] This is a plan view of another configuration of a rotatable drive chuck. [Figure 27] A perspective view of another configuration of the drive shaft for a high-speed surgical bur assembly. [Figure 28] Figure 27 is an elevation view of the drive shaft of a high-speed surgical bur assembly. [Modes for carrying out the invention]

[0011] Figure 1 shows a perspective view of the surgical handpiece system 10. Surgical handpiece System 10 includes a motor 12, a hub 14, and a nose tube assembly 16. The motor 12 is connected to the hub 14, and the nose tube assembly 16 is connected to the hub 14. It is connected to the 12. The nose tube assembly 16 is connected to the nose tube 17, drive unit It includes a shaft 24 (see Figure 2) and a cutting tool 18 coupled to the drive shaft 24. The motor 12 provides torque to the nose tube assembly 16 via the hub 14. It is configured as follows. Specifically, the motor 12 is connected to the nose tube assembly via the hub 14. The cutting tool 18 of the nose tube assembly 16, located at the distal end 21 of the ri 16, is rotated. Torque is transmitted to the drive shaft 24 of the nose tube assembly 16. Motor 12 The torque is transmitted to the cutting tool 18 via the hub 14 and nose tube assembly 16. It is configured to do so. In some configurations, the motor 12 is configured to exceed 50,000 revolutions per minute. The motor 12 is configured to rotate the cutting tool 18 at a certain speed. The high-speed torque transmission allows, for example, the nose tube assembly 16 to move precisely and efficiently through the nasal cavity. It allows for wear and tear. The nose tube assembly 16 also supports the spine, nerves, and It can be adapted for use in endoscopes.

[0012] Hub 14 can include various different configurations. Hub 14 can be straight or curved depending on the application. It may be curved. For example, in a curved configuration, the hub 14 is separated from the horizontal axis 20 of the hub 14. A seamless curve can be defined at a distance of 20 degrees, or the hub 14 can define the horizontal axis 20 The length of the straight line along it can be defined. Furthermore, the nose tube assembly 16 Furthermore, the nose tube assembly 16 may be curved or straight, depending on its intended use. More specifically, the nose tube 17 can be curved or straight. For example, The nose tube assembly 16 may include a bend at the proximal end 22, or a nose tube The distal end 21 of the nose tube assembly 16 may include a bent portion. For nasal application, the bent portion at the distal end 21 can be used, and the nose tube assembly 16 For spinal application, the flexed portion at the proximal end 22 of the nose tube assembly 16 can be used. Yes, it is possible. The bushing (not shown) is in contact with the inner surface of the nose tube 17 when the drive shaft 24 is in contact with the inner surface of the nose tube 17. To avoid contact, the drive shaft 24 is placed inside the lumen 26 of the nose tube 17 (see Figure 2). Align them. This allows the motor 12 to transmit torque via the drive shaft 24. This allows the drive shaft 24 to rotate independently of the nose tube 17.

[0013] Figure 1 shows a curved hub 14. The curved hub 14 is a surgical hub. Based on the desired surgical application of the dopiece system 10, it differs from a straight hub. As shown, the hub 14 and / or nose tube assembly 16 can be bent. The extent to which this may be affected by surgical application. Hub 14 and / or No The tube assembly 16 is straight, and it is thought that no bending points can be used. Specifically, the curved hub 14 is connected to the nose tube assembly. Used to support a rotatable component that enables torque to be transmitted to the 16. It may include multiple ball bearings (not shown) or other torque transmission mechanisms. The aligning of shafts (not shown) interconnected by a gear set (not shown) Provides and transmits torque from the motor 12 through the hub 14 to the nose tube assembly 16. do.

[0014] As described above, the hub 14 is attached to the motor 12. The hub 14 is surgically removed. The handpiece system 10 may include a function to help align and lock the motor 12. For example, the alignment of the dots in the hub 14 allows the hub 14 to be coupled to the motor 12. To that end, a dot (not shown) corresponding to another dot (not shown) on motor 12 Any visual indicator may be included. Furthermore, the hub 14 is located between the hub 14 and the motor 12. To enable a specific orientation, an anti-rotation pin (not shown) is provided at the proximal end 22 of the hub 14. May include. External c-clip (not shown) and O-ring (not shown) are connected to the hub 14 and motor. Motor 12 can further help establish a secure connection with the ta 12. Torque is transmitted to the nose tube assembly 16 via the hub 14. The hub 14 also May include notched sections (not shown). Notched sections allow the operator to use the surgical handpiece. This corresponds to a position on the hub 14 where a finger can be placed to hold the stem 10.

[0015] Figure 2 shows a cross-sectional view of the surgical handpiece system 10 taken along line 2-2 in Figure 1. Specifically, Figure 2 shows a cross-section of the nose tube assembly 16 and the hub 14. This shows that the motor 12 is not shown in Figure 2. The nose tube assembly 16 is It has a drive shaft 24 that extends through a lumen 26 defined by the nose tube 17. As shown, the drive shaft 24 extends into the hub 14, and the hub 14 transmits torque to the motor. It is configured to transmit from 12 to the drive shaft 24. The drive shaft 24 is nose-ch Between and beyond the proximal and distal ends 22, 21 of the tube assembly 16 It is presented as such.

[0016] As shown in Figures 2 and 3, the drive shaft 24 is at least partially within the lumen 26 It is located there. The drive shaft 24 also includes an alignment portion 28. The alignment portion 28 is drive The drive portion 30 of the drive shaft 24 is connected to a rotatable drive chuck 34 located inside the hub 14. It is configured to align in a direction that engages with the nose. The rotatable drive chuck 34 is configured to align in a direction that engages with the nose. The drive shaft 24 of the tube assembly 16 is positioned in alignment with the hub 14, and the motor 12 Torque is transmitted via the drive shaft 24. As will be explained in more detail below, The alignment portion 28 of the shaft 24 is located at the proximal end 22 of the nose tube assembly 16. The rotatable drive chuck 34 is used to align the drive shaft 24 with the hub 14. When the nose tube assembly 16 is pressed toward the hub 14, the drive shaft It engages with the leading edge 36 of the alignment portion 28 of the shaft 24. Specifically, the alignment portion 28 is one This defines a plurality of leading edges 36, and one or more inclined surfaces 3 of the rotatable drive chuck 34. 8 engages with the drive portion 30 of the drive shaft 24 within the rotatable drive chuck 34. The inclined surface 38 of the rotatable drive chuck 34 will be described in more detail below. The configuration of the leading edge 36 of the alignment portion 28 allows the drive shaft 24 to self-align. In other words, the nose tube assembly 16 is pressed toward the hub 14. The leading edge 36 of the alignment portion 28 engages with the inclined surface of the rotatable drive chuck 30, and drives Rotate the shaft 24. This engagement and the hub 14 of the nose tube assembly 16. The continuous pressing causes the drive unit 24 to engage with the drive unit 30, which is rotatable with the drive chuck 34. The drive shaft 24 is rotated in the direction of the drive shaft 24 and the rotatable drive chuck. This enables torque transmission between 34 and 34, regardless of the initial radial orientation of the aligned portion 28. The configuration of the inclined surface 38 and the leading edge 36 of the alignment portion 28 of the rotatable drive chuck 34 is as follows: When the drive shaft tube assembly 16 is pressed toward the hub 14, Ensure that the 24 drive unit 30 is in a direction that engages with the rotatable drive chuck 34. The self-aligning function occurs when the nose tube assembly 16 is coupled to the hub 14. The drive shaft 24 is not visible, and the drive shaft 24 is in the nose tube assembly. Since it cannot move axially within the ri16, this is beneficial in certain embodiments. The user grasps the outer surface of the nose tube 17 and presses it toward the hub 14. The drive shaft 24 and the rotatable drive chuck are moved only by axial movement, with respect to the aligned portion 28. The engagement with 34 ensures proper orientation of the drive unit 30 toward the rotatable drive chuck 34. Therefore, the user needs to rotate the cutting tool 18 of the nose tube assembly 16. This causes the drive shaft 24 to rotate without any other action.

[0017] Proper alignment between the hub 14 and the drive shaft 24 is indicated by haptic feedback. It is possible. More specifically, the inclination of the leading edge 36 of the alignment portion 28 of the rotatable drive chuck 34. When engaging with surface 38, via the surgical handpiece system 10, for example, with the front edge 36 Tactile feedback, such as vibrations from contact with the inclined surface 38, can be felt. Sensory feedback is transmitted between the nose tube assembly 16, the hub 14, and the motor 12. This may indicate the appropriate alignment.

[0018] As shown in Figure 3, when aligned in the appropriate orientation, the drive portion 30 of the drive shaft 24 This engages with the flat surface 40 in the drive chamber 42 of the rotatable drive chuck 34. Torque can be transmitted from the motor 12 through the hub 14 to the drive shaft 24. In other words, the drive unit 30 is located inside the drive chamber 42 of the rotatable drive chuck 34. When aligned with the flat surface 40, the motor 12 transmits torque via the hub 14, enabling rotation. The movable chuck 34 rotates independently of the hub 14. Bearing 4 is located inside the hub 14. 4 is the drive shaft 24 and rotation along the horizontal axis 20 of the surgical handpiece system 10. It helps to align the rotatable drive chuck 34. Therefore, the bearing 44 is Rotatable drive chuck 34 and drive shaft 24 within the 14, as well as nose tube By aligning each of the bracket assemblies 16, efficient torque along the horizontal axis 20 is achieved. Enables transmission.

[0019] Figure 3 shows the drive shaft located within the hub 14, taken along line 3-3 shown in Figure 1. A partial cross-sectional view of the shaft 24 is shown. Specifically, Figure 3 shows the rotatable drive chuck 34. This shows the drive portion 30 of the drive shaft 24, which is aligned within the drive chamber 42. Bearing 4 4 engages with the drive shaft 24 and the rotatable drive chuck 34, and the drive shaft 2 Align 4 and the rotatable drive chuck 34 along the horizontal axis 20, and drive shaft 24 It is shown that the rotatable drive chuck 34 can rotate independently of the hub 14. The drive shaft 24 and the rotatable drive chuck 34 are independently connected to the hub 14. The rotational force of the motor 12 transmits torque to the cutting tool 18, such as a bar, via the hub 14. It can be transmitted.

[0020] Referring again to Figure 3, the nose tube 17 of the nose tube assembly 16 is When the nose tube assembly 16 is coupled to the hub 14, the proximal end of the nose tube 17 A recess 48 is located at 22 and is adjacent to the bearing 44. Specifically, the nose Tube 17 is a nose tube assembly 16 for the surgical handpiece system 10. To suppress the depth, a recess 48 is provided for receiving a biasing member 46 such as a C-clip. It has a defined outer surface 56. The biasing member 46 is positioned axially in a predetermined position using the hub 14. It is held in place. When the nose tube assembly 16 is inserted into the hub 14, the biasing member 46 When the nose tube assembly 16 is fully inserted into the hub 14, the biasing member 46 is recessed. The nose tube assembly 16 expands when inserted so that it seats within part 48. .

[0021] The biasing member 46, during use of the surgical handpiece system 10, affects the nose tube assembly. The bridge 16 is positioned within the recess 48 to hold it in place along the horizontal axis 20. Therefore, the recess 48 is sometimes called the retaining function 48, and the biasing member 46 is for surgical use During use of the handpiece system 10, the nose tube assembly 16 relative to the hub 14 And to maintain the axial alignment of the drive shaft 24, it is located within the holding function 48. In other words, when the nose tube assembly 16 is pushed into the hub 14, the biasing member 4 6 opens and grips the recess 48. The biasing member 46 engages the holding function, It functions to maintain the depth of the nose tube assembly 16 relative to the hub 14, The biasing member 46 is sometimes called a retaining element. The biasing member 46 is a hub 14. The biasing member 46 prevents axial movement of the tube assembly 16. More specifically, the biasing member 46 When the biasing member 46 engages with the recess 48, the nose tube assembly 16 moves to the hub 1 4. Prevents accidental separation from the biasing member 46 and the recess 48. The force member 46 is extended from the recess 48 to separate the nose tube assembly 16 from the hub 14. It can be overcome by applying sufficient force (for example, by pulling).

[0022] As described above, the biasing member 46 is located along the horizontal axis 20 relative to the hub 14, along the nose tube It helps to restrain assembly 16. As shown in Figure 3, the recess 48 is the biasing member 4 6 extends radially away from the lumen 26 of the nose tube 17 so as to be adjacent to projection 52. A chamfered edge 50 may be positioned adjacent to the projection 52 of the nose tube 17. The chamfered edge 50 of the recess 48 connects the nose tube assembly 16 from the hub 14. This reduces the force required by the user to remove it.

[0023] As shown in Figure 3, the drive shaft 24 is located distal to the alignment portion 28. Includes part 27 and the drive portion 30 of the drive shaft 24. Holding portion 27 of the drive shaft 24 It can be placed inside the lumen 26 of the nose tube 17. Specifically, the retaining part 2 7 extends partially into the nose tube assembly 16 and drives relative to the nose tube 17 The inner surface shelf 33 of the nose tube 17 defines the lumen 26 to restrain the moving shaft 24. It is configured to be adjacent to the. In some configurations as shown in Figure 3, the bearing is It can be inserted between the shelf 33 and the holding portion 27 of the drive shaft 24. The holding portion 27 is a holding The holding portion 27 restrains the drive shaft 24 against the nose tube assembly 16. To make this possible, a diameter 29 greater than the diameter 31 of the lumen 26 is specified. This configuration is This prevents the drive shaft 24 from being axially removed distally from the nose tube 17. In one configuration, the lumen 26 and / or distal end of the nose tube 17 is connected to the distal end 21. The relative diameter of the cutting tool 18 to the bushing 35 (see Figure 2) is such that the drive shaft 24 This prevents the nose tube 17 from being detached axially in the proximal direction.

[0024] Referring to Figures 4-6, the nose tube assembly 16 and the rotatable drive chuck 34 partial perspective views are shown. Figure 4 shows the nose of the surgical handpiece system 10. Figure 4 shows a partial perspective exploded view of the tube assembly 16 and hub 14. Shown as disassembled along the horizontal axis 20, the nose tube assembly 16 and The hubs 14 are spaced apart along the horizontal axis 20. Specifically, Figure 4 shows the table. Decompressed perspective view of nose tube assembly 16 having a projection 52 extending radially from surface 56. A diagram is shown. Figure 5 shows a portion of the nose tube assembly 16 removed from the hub 14. Figure 6 shows a segmented perspective view. Figure 6 shows the recesses 48 and protrusions 52 on the surface 56 and the rotatable drive. A partial perspective view of the nose tube assembly 16, which defines the chuck 34, is shown.

[0025] Referring to Figure 4, the hub 14 has a proximal end 62 and a distal end 60 opposite the proximal end 62. The hub 14 has an inner surface that defines a bore 58 extending from the distal end 60 to the proximal end 62. The inner surface also communicates with a bore 58 that extends from the distal end 60 toward the proximal end 62. Nell 54 is defined. The projection 52 of the nose tube 17 is the nose tube assembly 16 While inserting it into the bore 58 of the hub 14, align the nose tube 17 radially. It is compatible. In this way, the projection 52 is a radial alignment machine of the nose tube 17. It functions as function 52. In other words, the projection 52 functions as a keyed alignment function 52. The projection 52 functions and fits into the channel 54 defined in the hub 14. The radial movement of the nose tube 17 when the channel 54 accepts the projection 52 is slight. The size is determined to accommodate the projection 52 so that it is reduced. By doing so, the nose tube assembly 16 can be precisely connected to the hub 14. In this way, the projection 52 slides within the channel 54 relative to the hub 14. The nose tube 17 is aligned radially. Two channels 54 and two protrusions 52 It is possible that the channels 54 and projections 52 are spaced apart from each other in the diametrical direction across the longitudinal axis. In another configuration, the hub 14 moves the nose tube assembly 16 in two different directions. Two channels 54 and one projection 5 allow coupling to the hub 14. 2 is possible. Such a configuration involves the hub 14 and / or nose tube assembly 1. Option 6 may be advantageous when using the bent portion as described above.

[0026] As mentioned, the projection 52 extends radially from the nose tube 17. Specifically, The projection 52 extends perpendicularly from the surface 56 of the nose tube 17. By extending from surface 56, projection 52 engages with channel 54 defined by hub 14. Therefore, the radial movement of the projection 52 in the channel 54 is, for example, controlled by the hub 14 This prevents the nose tube 17 from rotating. (Protrusion 52 in channel 54) The engagement also involves the drive part of the drive shaft 24 in the drive chamber 42 of the rotatable drive chuck 34. It helps to roughly align the 30 minutes. In this way, the projection 52 is efficient and precise Provides alignment.

[0027] The projection 52 extends from the surface 56 of the nose tube 17 to the peak 66. The peak 66 is This specifies the height of the projection 52. The height of the projection 52 can be based on the dimensions of the hub 14. The peak 66 of the projection 52 may be formed from at least one first inclined surface 72. As will be described in detail, projection 52 also has two first and second inclined surfaces 72, 74 It can be formed from the first inclined surface 72 to the second inclined surface 74. It is possible.

[0028] The first inclined surface 72 extends from the chamfered edge 50 of the recess 48 to the peak 66 of the projection 52. The second inclined surface 74 is positioned along the aligned portion 28 of the drive shaft 24. It may extend to the peak 66 of the projection 52. The first and second inclined surfaces 72, 74 also has first and second inclined surfaces 72, 74 which reach their peak at the peak 66 of projection 52. The opposite slope can be defined in this way. The slope of the first and second inclined surfaces 72, 74 The angle forming the bevel is the optimal extension of the projection 52 when the projection 52 slides within the channel 54. And it can change or become equal based on the behavior. In other words, peak 66 extends between the first and second inclined surfaces 72, 74 and defines the height of the projection 52. The first and second inclined surfaces 72 and 74 can be interconnected. 74 also helps to allow projection 52 to slide in channel 54 of hub 14. The first and second inclined surfaces 72 and 74 allow the projection 52 to slide through the channel 54. By reducing friction, assembly is made easier. Furthermore, Peak 66 is the first The radius between the first and second inclined surfaces 72, 74 can be defined. For example, peak 66 is the first The curve can be rounded between the first inclined surface 72 and the second inclined surface 74. Radius of peak 66 This can be determined based on the optimal sliding parameters of the projection 52 within the channel 54. Therefore, the radius of peak 66 fits within channel 54 defined by hub 14. It can be formed in a similar manner. Other shapes of the projection 52 are also conceivable.

[0029] As mentioned above, the projection 52 is positioned adjacent to the recess 48. Specifically, In this configuration, the first inclined surface 72 is formed near the chamfered edge 50 of the recess 48. Retaining (shown as a recess) and radial alignment machine for the tube assembly 16. Both of the protrusions (shown as 48 and 52) can be placed adjacent to each other. The projection 52 is positioned adjacent to the recess 48, so the nose tube assembly 16 When it is coupled to the hub 14, the biasing member 46 is adjacent to the projection 52 on the nose tube 17 To maintain alignment during insertion, the projection 52 is positioned relative to the height of the peak 66 on the horizontal axis 20. The recess 48 is defined such that the distance to the horizontal axis 20 is less than the height of the peak 66. The height of the peak 66 is greater than the distance from the biasing member 46 to the horizontal axis 20. Therefore, the projection 52 properly engages with the channel 54 formed in the hub 14 and slides. can.

[0030] In another configuration, the recess 48 is located at a distance greater than the height of the peak 66 from the horizontal axis 20. If defined as such, peak 66 does not engage with channel 54, and nose tube 17 and hub A rotational misalignment between 14 and 14 may be introduced during the use of the surgical handpiece system 10. Therefore, the distance from the recess 48 to the horizontal axis 20 is less than the height of the peak 66. Furthermore, the projection 52 has a holding function 48, and the hub 14 and nose tube assembly 16 Therefore, it is possible to maintain axial alignment with the drive shaft 24 while performing surgery During use of the handpiece system 10, rotational adjustment between the nose tube 17 and the hub 14 The columns can be maintained.

[0031] Understanding the nose tube 17 from the perspective of the first region 84 and the second region 86 is It may be useful (see Figures 2 and 3). The first region 84 is the nose tube 17 It can represent the majority of the length, while the second region 86 interacts with the hub 14. This may be part of the tube 17. In a particular configuration, the first region 84 and the second region Both 86 can be formed from a metallic material such as stainless steel. The second region 86 is single It can extend monolithically from the first region 84 from a single piece of metal stock. If you change it, the nose tube 17, which includes both the first region 84 and the second region 86, is It can be formed from a single piece of metal stock. The second region 86 is a surgical handpiece system Radial alignment function for holding the nose tube assembly 16 axially in 10 It may include 52 and axial holding functions 48. The alignment and holding functions 52, 48 are first and The second region 84, 86 may be formed from a metallic material, and thus the alignment function 52 The retaining function 48 is used to machine the first region 84 of the nose tube 17. It can be machined from the same metal stock piece.

[0032] Referring to Figures 7 and 8, the proximal portion of the drive shaft 24 is shown. Figure 7 shows the front The diagram shows a perspective view of the alignment portion 28, which includes the edge 36, the holding portion 27, and the drive portion 30. Figure 8 shows a front view of the proximal portion of the drive shaft 24. Specifically, Figure 8 shows the drive This shows a front view of the alignment portion 28 of the shaft 24.

[0033] In one exemplary configuration of the assembly, the user can connect the nose tube assembly 16. The user grasps the nose tube 17. The user then inserts the nose tube assembly into the bore 58 of the hub 14. Insert the bridle 16 partially. Next, the user inserts the projection 52 of the nose tube 17 into the hub 1 Align with channel 54 of 4 and press nose tube assembly 16 toward hub 14 The engagement between projection 52 and channel 54 halfway connects the nose tube 17 to the hub 14. Align radially. When the proximal end of the nose tube 17 is adjacent to the biasing member 46, the biasing part Material 46 expands to accommodate the nose tube 17. Nose tube assembly 1 As 6 continues to be pressed toward the hub 14, the biasing member 46 moves toward the recess 4 of the nose tube 17. Accepted by 8. When the recess 48 accepts the biasing member 46, the nose tube 17 and the rest of the nose tube assembly 16 are held axially relative to the hub 14. It is held.

[0034] Before the recess 48 receives the biasing member 46, the leading edge 3 of the alignment portion 28 of the drive shaft 24 6 is adjacent to the inclined surface 38 of the rotatable drive chuck 34, the drive shaft 24, below This means that the drive portion 30 of the drive shaft 24 engages with the rotatable drive chuck 34 in the direction of engagement. The drive portion 30 of the drive shaft 24 is cambed toward it. The recess 48 receives the biasing member 46. When this happens, the drive shaft 24 is in the drive chamber 4 of the drive chuck 34, which is rotatable by the drive part 30. Accepted into 2, the drive unit 30 rotates adjacent to the plane 40 of the rotatable drive chuck 34. The cam receives torque from the rotatable drive chuck 34 and rotates in the same direction as it receives torque. It is. When the nose tube assembly 16 was first introduced to the hub 14 (i.e., Depending on the initial radial orientation of the drive shaft 24 (before the operation), the leading edge 3 of the aligned portion 28 6 is a rotatable drive chuck at different axial positions of the nose tube 17 relative to the hub 14. The initial radial direction of the drive shaft 24 can first make contact with the inclined surface 38 of the back 34. However, the drive portion 30 of the drive shaft 24 is received in the drive chamber 42, and the rotatable drive ch If the leading edge 36 of the alignment portion 28 is already in the orientation required to engage with the lock 34, then rotate It will not come into contact with the inclined surface 38 of the drive chuck 34.

[0035] The axial position of the drive shaft 24 relative to the rotatable drive chuck 34 is determined by the biasing member 46 and maintained by the axial retention of the nose tube 17 to the hub 14 via the recess 48. In other words, the drive shaft 24 is held axially relative to the nose tube 17. Therefore, the axial position of the drive shaft 24 relative to the hub 14 and the rotatable drive chuck 34 The position of the nose tube 17 is axially relative to the hub 14 and the rotatable drive chuck 34. It is tied to the position. The nose tube 17 is extended by the user to extend the biasing member 46. The nose tube assembly is applied to the hub 14 with sufficient force to overcome the biasing member 46. The rim 16 is held in place by the biasing member 46 until it is pulled.

[0036] As mentioned above, the alignment portion 28 of the drive shaft 24 is the drive of the rotatable drive chuck 34. A leading edge 36 is defined which helps to align the drive portion 30 of the drive shaft 24 within the drive chamber 42. When the nose tube assembly 16 is inserted into the bore 58 of the hub 14, the leading edge 36 is The inclined surface 38 of the drive chamber 42 in the rotatable drive chuck 34 engages with the rotatable drive chuck The drive portion 30 of the drive shaft 24 in the drive chamber 42 of the jack 34 is aligned. The leading edge 36 is It engages with the inclined surface 38, converting the insertion force into rotational force, and rotates with the drive portion 30 of the drive shaft 24. Provides alignment with the rotatable drive chuck 34. Described as a single leading edge 36. However, the aligned portion 28 of the drive shaft 24 may include one or more leading edges 36.

[0037] Figure 6 shows at least two curved surfaces 80 defined on the aligned portion 28 of the drive shaft 24. The leading edge 36 is shown in between. The curved surfaces 80 interconnected to define the leading edge 36. The leading edge may be asymmetrical across the horizontal axis 20. The curved surface 80 is connected to the aligned portion 28 This forms the tip 82. As shown in Figures 7 and 8, the tip 82 resembles a parallelogram. As mentioned above, the rotatable drive chuck 34 rotates independently of the hub 14. Protrusion 5 When 2 is inserted into channel 54, the alignment portion 28 is on the inclined surface of the rotatable drive chuck 34. It engages with 38 to align the drive part 30 in the drive chamber 42. Specifically, the leading edge 36 is inclined. Contact with surface 38 causes cam rotation of drive shaft 24, and the drive part in drive chamber 42 Ensure proper alignment of 30. Thus, the leading edge 36 is the drive portion of the drive shaft 24. Further assists in aligning 30 with the flat surface 40 inside the drive chamber 42, and the nose tube from the motor 12 The torque is accurately transmitted to the cutting tool 18 located at the distal end 21 of the hub assembly 16.

[0038] Referring to Figures 9-25, another configuration of the surgical handpiece system 100 is shown. The configuration of the surgical handpiece system 10 described above is as follows: Please understand that it may contain elements similar to those of System 100, and vice versa.

[0039] As shown in Figure 9, the surgical handpiece system 100 is a high-speed surgical bar assembly. It comprises a bri 102 (Figure 10) and a surgical handpiece assembly 104 (Figure 14). Similar to the configuration of the surgical handpiece system 10 shown in Figures 1-8, The system 100 also provides torque to the surgical handpiece system 100. A motor (not shown) configured to be coupled to a surgical handpiece assembly 104. It may include.

[0040] Referring to Figure 11, a cross-section of one component of the high-speed surgical bur assembly 102 is shown. The high-speed surgical bur assembly 102 includes a nose tube 106. The nose tube 106 defines the lumen extending between the proximal and distal ends of the nose tube 106. At least the proximal portion 108 of the nose tube 106 extends along axis AX. Tube 106 does not extend axially along the entire length of the nose tube 106, as shown in Figure 1. The nose tube 106 shown in 1 may include a bent portion such as the distal bent portion. The bent portion is To assist the user in positioning the distal end of the nose tube 106 in a specific advantageous position during surgery. It is possible.

[0041] The high-speed surgical bur assembly 102 is located at least partially within the lumen of the nose tube 106. It further includes a drive shaft 110 positioned precisely. It is configured to rotate relative to the 106. The proximal region 112 of the drive shaft 110 is As will be explained in more detail below, it engages with the surgical handpiece assembly 104. The high-speed surgical bur assembly 102 is configured to be located at the distal end of the drive shaft 110. The cutting tool 114 is further connected to the nose tube 10 It is configured to rotate together with the drive shaft 110 relative to 6. In one configuration, the cutting tool 114 is a bur. In other configurations, the cutting tool 114 is configured to polish the tissue. It also includes another rotary tool.

[0042] The high-speed surgical bur assembly 102 is connected to the drive shaft 110 and the nose tube 106. It can be equipped with bushings 116, 118, and 120 to facilitate relative rotation between them. The proximal bushing 116 is connected to the nose tube 106. It can be positioned at least partially within the lumen and around the drive shaft 110. The sing 118 is connected to the nose tube 106, and the lumen of the nose tube 106 is The central bushing 120 can be at least partially positioned around the drive shaft 110. It is distributed within the lumen between the proximal bushings 116, 120 and the distal bushings 116, 120. The drive shaft 110 and nose tube 106 are positioned within the lumen of the nose tube 106. Contact between them can be prevented. In one configuration, the central bushing 120 is the nose tube It is fixed to bushing 106. In another configuration, the proximal and distal bushings 116, 118 are The central bushing 120 is held within the lumen of the nose tube 106. In other configurations, The central bushing 120 is located opposite the bent portion of the nose tube 106 and the central bushing 120. The corresponding bends hold it within the lumen of the nose tube 106. The shings 116 and 118 also connect the drive shaft 110 to the nose tube 106. It can function as a holding function for that purpose. In one configuration, the proximal region 112 of the drive shaft 110 is , including a retaining portion 122 located proximal to the proximal bushing 116. Proximal to the drive shaft 110 The holding portion 122 of region 112 is a drive shaft distal to the nose tube 106 To prevent movement of part 110, it has an outer diameter larger than the inner diameter of the proximal bushing 116. The cutting tool 114 moves the drive shaft 110 in a proximal direction relative to the nose tube 106. To prevent this, the distal bushing 118 can have an outer diameter larger than its inner diameter. In this configuration, the drive shaft 110 is connected to the nose tube 106 in a different way, Relative rotation between the drive shaft 110 and the nose tube 106 is enabled, and the drive shaft 1 This prevents axial movement between 10 and the nose tube 106.

[0043] Referring to Figure 12, the proximal portion 108 of the nose tube 106 has an outer surface. The outer surface is , engages with the surgical handpiece assembly 104 and the surgical handpiece assembly 10 A recess 124 can be defined for 4 to suppress the depth of the nose tube 106. The outer surface of the proximal portion 108 of the nose tube 106 defines the proximal end of the recess 124. It has a proximal shoulder 126 and a distal shoulder 128 that defines the distal end of the recess 124. Obtain. Either or both of the proximal and distal shoulders 126, 128 are first It can become thinner. The nose tube 106 has a projection 130 located near the recess 124. The projection 130 is located on the nose tube 1 relative to the surgical handpiece assembly 104. It is configured to suppress the radial orientation of 06. The projection 130 is located proximal to axis AX They can extend almost parallel. The proximal end of the projection 130 may include a rounded surface 132. The projection 130 of the proximal portion 108 of the nose tube 106 is near the nose tube 106. The portion 108 may include a flat surface 344 parallel to the axis AX. The rounded projection 130 Flat surfaces 132 and 134 are the nose tube 106 and the surgical handpiece assembly 104. It can help the engagement between the nose tube 106 and the surgical handpiece assembly. The engagement with Bri 104 will be described in more detail below. The structure shown in Figure 12 In this configuration, the nose tube 106 includes two projections 130, and the surgical handpiece assembly The radial orientation of the nose tube 106 relative to the bridge 104 is suppressed. Instead, a single Using the projection 130, the nose tube of the surgical handpiece assembly 104 It is thought that the radial orientation of 106 can be suppressed. Surgical handpiece asse To suppress the radial orientation of the nose tube 106 relative to the rim 104, three or fewer It is also possible to use the upper projection 130.

[0044] Referring to Figure 13, the proximal region 112 of the drive shaft 110 is the nose tube 106 The proximal portion 108 is rotatable around axis AX. Proximal region 11 of drive shaft 110 2 is a retaining part 1 for engaging the surgical handpiece assembly 104 in the driving direction. It includes a drive unit 136 located proximal to 22. The drive unit 136 is a surgical handpiece assembly It may have two or more drive surfaces 138 for engaging with the rim 104. The drive surfaces 138 are flat It is flat and can be parallel to axis AX.

[0045] The proximal region 112 of the drive shaft 110 is also connected to the drive portion 136 of the drive shaft 110. It may include a proximal alignment portion 140. The alignment portion 140 is connected to the drive shaft 1 Since it extends from the drive portion 136 to the proximal end, it has an outer surface that tapers toward the shaft AX. The alignment portion 140 engages with the surgical handpiece assembly 104 and the drive portion 1 36 is configured to be aligned in the driving direction. In the configuration shown in Figure 13, the alignment portion 14 0 is near the drive shaft 110 to engage with the surgical handpiece assembly 104. The proximal edge 142 is adjacent to the proximal end of the positional region 112. In other configurations, the aligned portion 140 is The proximal margin 142 may include a flat or rounded surface. The aligned portion 140 is The aligned portion 140 of the drive shaft 110 and the surgical handpiece assembly 104 are engaged. To reduce contact between them, a notch 14 extends distally from the proximal end of the drive shaft 110. 4 can be defined. By reducing the amount of contact during engagement, the contact caused by multiple contact points Potential blockages during alignment can be reduced. In other configurations, the alignment section 140 is notched. 144 cannot be defined.

[0046] In the configuration shown in Figure 13, the proximal region 112 of the drive shaft 110 is the nose tube It is located outside the lumen of 106 and proximal to the proximal portion 108 of the nose tube 106. In other configurations, the proximal region 112 of the drive shaft 110 is at least partially non- Distributed within the lumen of the nose tube 106, or distal to the proximal portion 108 of the nose tube 106. It can be placed between the proximal region 112 of the drive shaft 110 and the surgical handpiece assembly 10. The engagement with 4 will be explained in more detail below.

[0047] In another configuration shown in Figures 27-28, the aligned portion 140 of the drive shaft 110 is proximal It may include a proximal surface 194 located near the edge 142, and the drive portion 136 is aligned in the driving direction. After that, the proximal edge 142 is connected to the rotatable drive chuck of the surgical handpiece assembly 104. Prevents engagement with 172. The proximal surface 194 may include a plane perpendicular to axis AX. Other configurations Therefore, the proximal surface 194 may include a rounded surface.

[0048] Referring to Figures 15 and 16, the surgical handpiece assembly 104 is connected to the hub 146 The hub 146 accepts at least a portion of the high-speed surgical bar assembly 102. It has a bore 148 that defines a cavity 150 for doing so. Specifically, the cavity 150 is less The proximal portion 108 of the nose tube 106 of the high-speed surgical bur assembly 102, and the drive The proximal region 112 of the shaft 110 is configured to receive the proximal portion of the hub 146. The motor, as well as the motor 12 coupled to the hub 14 in the configuration shown in Figure 1, includes a motor. It may be configured to be coupled to a motor housing (not shown).

[0049] The surgical handpiece assembly 104 has a biasing force located within the cavity 150 of the hub 146. The hub 146 further comprises member 152. The biasing member 152 may be a C-clip. A148 can define a recess 154 that communicates with the cavity 150. The recess 154 defined by A148 is configured to receive the biasing member 152. The bore 148 of the hub 146 defines the distal end of the recess 154 of the hub 146. The distal shoulder 156 may have a biasing member 152 connected to the hub 14. 6 prevents protrusion distally from recess 154. The high-speed surgical bur assembly 102 is surgical When accepted by the cavity 150 of the hub 146 of the handpiece assembly 104, The biasing member 152 is received by the recess 124 of the nose tube 106. Material 152 is a high-speed surgical bar assembly in the cavity 150 of the hub 146 relative to the hub 146. To suppress the depth of the nose tube 106 of 102, the recess 1 of the nose tube 106 Configured to engage with one or both of the proximal and distal shoulders 126, 128 of the 24 It is possible. The biasing member 152 has tapered surfaces 158, 160 at its proximal or distal end, and This can help facilitate engagement between the force member 152 and the nose tube 106.

[0050] Refer to Figures 18-20. The surgical handpiece assembly 104 also includes a biasing member 15 It may include a radially aligned member 162 positioned within a cavity 150 of the hub 146 located proximal to 2. The radial alignment member 162 is the relative motion between the hub 146 and the radial alignment member 162. To prevent this from happening, it can be press-fitted into the cavity 150 of the hub 146. Radial alignment section Unless relative movement is permitted between material 162 and hub 146, radial alignment member 16 It is conceivable that 2 and hub 146 could be connected to each other in other ways.

[0051] The radial alignment member 162 aligns the radial direction of the nose tube 106 with respect to the hub 146. To suppress the direction, a notch 16 for receiving the projection 130 of the nose tube 106 4 is defined. In the configuration shown in Figures 18-20, the radial alignment member 162 is at each notch Notches 164 are spaced 90 degrees apart from adjacent notches 164, and are arranged circumferentially at equal angles to each other. Defines four spaced notches 164. Nose tube relative to hub 146 To suppress the radial orientation of the nose tube 106, the projection 130 of the nose tube 106 is received It is thought that three or fewer notches 164 can be used to insert it. Hub 14 In order to suppress the radial orientation of the nose tube 106 relative to 6, the nose tube 1 Five or more notches 164 can be used to accommodate the 06 protrusion 130. It is also possible that the spacing between the notches 164 is uneven and arranged in the circumferential direction. It is conceivable that they could be placed in any position. The number of notches 164 is relative to the hub 146. It is understood that the number of possible radial orientations of the nose tube 106 can be determined. The spacing of the notches 164 can determine how far apart the radial orientations are. It is possible. Allowing multiple orientations is possible when the nose tube 106 uses a bend. This could be particularly advantageous. The bent portion has a notch 164 in the radially aligned member 162 that forms the nose tube. Based on accepting the projection 130 of part 106, the surgical handpiece assembly 10 It can be oriented differently to 4.

[0052] The radial alignment member 162 engages with the projection 130 of the nose tube 106. It may have aligned walls 166 extending distally from the tip 164. The aligned walls 166 are projections If 130 is not yet radially aligned with the notch 164 of the radial alignment member 162 , so that the notch 164 can receive the protrusion 130 of the nose tube 106 The nose tube 106 can be positioned radially during engagement. 66 can be used for each notch 164 of the radial alignment member 162. It is on both sides There are one at a time. Each of the two alignment walls 166 has a nose tube 106 and a hub 146. When pushed in the axial direction, the alignment wall 166 of the radius alignment member 162 and the nose tube 1 Contact between projection 130 of 06 is due to relative rotation between nose tube 106 and hub 146 Furthermore, the projection 130 is oriented toward the notch 164, tapering inward toward the notch 164. This can be the case. In a configuration in which the radially aligning member 162 includes multiple alignment walls 166, the notch 16 The four consecutive aligned walls 166 can taper in the opposite direction. Furthermore, the projection 130 of the nose tube 106 is aligned with the notch 164 of the radial alignment member 162. Instead of arranging them in a directional manner, the possibility of the protrusions 130 becoming jammed in the radially aligned member 162 is reduced. To that end, they can collectively form a rim 168. The projection 130 has a rounded surface 132. The configuration further helps to reduce jamming with the radially aligned member 162.

[0053] As shown in Figure 18, the radial alignment member 162 also further defines each notch 164 To determine, it may include one or more flat surfaces 170. The flat surface 170 is such that when the projection 130 is received by the notch 164, the nose tube 10 To prevent relative rotation between 6 and hub 146, the projection 130 of the nose tube 106 is flat It can engage with the flat surface 134. Relative rotation between the nose tube 106 and the hub 146 is prevented. When this occurs, the axial movement between the nose tube 106 and the hub 146 due to relative rotation also occurs. It will be prevented.

[0054] In the configuration shown in Figure 20, the radial alignment member 162 is located at the far end of the recess 154 of the hub 146. The shoulder 156 helps to hold the biasing member 152 in the recess 154 of the hub 146. As described above, the distal shoulder 156 prevents the biasing member 152 from exiting the recess in the distal direction. With the radial alignment member 162 positioned immediately in the vicinity of the biasing member 152, the radial direction The alignment member 162 forms the proximal shoulder of the recess 154, and the biasing member 152 moves in the proximal direction This prevents the recess 154 from coming out. In other configurations, the bore 148 of the hub 146 is the recess 154 Radially aligned member 162 may include a proximal shoulder (not shown) for defining the proximal end. It may be positioned proximal to the proximal shoulder.

[0055] In some configurations, the biasing member 152 is located in the cavity 1 of the hub 146, with the nose tube 106 being located in the hub 146. Inserted into 50, the protrusion of the nose tube 106 into the notch 164 of the radial alignment member 162 When pushing in the starting 130, the distal shoulder 156 and nose tube 1 of the hub 146 The projection 130 is configured to engage with the proximal shoulder 126 of 06. Therefore, if already partially accepted, the biasing member 152 and the shoulder 126, 1 The engagement with 56 continues until the engagement is stopped, or the projection 130 is on the proximal surface of the notch 164. The projection 130 is adjacent to the notch 164 and fully accepted by the notch 164. It can be pushed in more deeply.

[0056] As shown in Figure 16, the surgical handpiece assembly 104 also has a rotatable drive. It is equipped with a movable chuck 172. The rotatable movable chuck 172 moves around the hub axis HX. It is configured to rotate by a t. Proximal portion 174 of the rotatable drive chuck 172 The drive chuck 172 can be directly engaged with the motor, or it can be rotatable. Driven by a motor, and to transmit torque from the motor to the rotatable drive chuck 172 It can engage with a configured gear assembly or another assembly. Rotatable drive The moving chuck 172 is located within the cavity 150 of the hub 146, which is near the radius alignment member 162. The rotatable drive is partially positioned and configured to rotate relative to the hub 146. The moving chuck 172 has an opening 17 for receiving the proximal region 112 of the drive shaft 110. Define 6.

[0057] As shown in Figures 23-25, the rotatable drive chuck 172 is located proximal to the opening 176 It is equipped with a drive part 178. The drive part 178 is the proximal region 112 of the drive shaft 110 At least It has two drive surfaces 180. Drive surface of drive portion 178 of rotatable drive chuck 172 180 has the drive shaft 110 in the drive direction and the high-speed surgical bur assembly 102 outwards When coupled to the medical handpiece assembly 104 (see Figure 17), the drive shaft It engages with the drive surface 138 of the drive part 136 of the drive shaft 110. However, when it is parallel to the drive surface 180 of the drive portion 178 of the rotatable drive chuck 172, The drive shaft 110 is in the driving direction. In the configuration shown in Figures 23-25, the drive part 1 78 has eight drive components to accommodate various orientations of the drive portion 136 of the drive shaft 110. It has a moving surface 180. If there are more than two driving surfaces 180, there are multiple driving directions. It is thought that... For example, in the configuration shown in Figures 23-25, there are four different driving directions. In other words, the drive shaft 110 is driven by the rotatable drive chuck 172. to rotate the rotatable drive chuck 172 in four different radial orientations. This is possible. The drive unit 178 instead includes 3 to 7 drive surfaces 180 and drive shaft It is thought that the drive part 136 of the to 110 can engage with it. Alternatively, the drive part 1 78 has nine or more drive surfaces 180 to engage with the drive portion 136 of the drive shaft 110 It is conceivable that it may possess such properties.

[0058] The rotatable drive chuck 172 also has a drive portion 17 It may include an alignment portion 182 positioned between 8 and the opening 176. The alignment portion 182 rotates From the drive portion 178 of the rotatable drive chuck 172 to the opening of the rotatable drive chuck 172 It may have an alignment edge 184 extending distally. The alignment edge 184 is rotatable Since the drive portion 178 of the drive chuck 172 extends distally, the alignment edge 184 is aligned with the hub axis H It tapers away from X. The alignment edge 184 of the alignment section 182 aligns the drive shaft 110. It is configured to engage with part 140 and rotate the drive shaft 110 in the driving direction.

[0059] The alignment portion 182 of the rotatable drive chuck 172 is Extending distally from the drive unit 178 toward the opening 176 of the rotatable drive chuck 172 It may have a first inclined surface 186. The first inclined surface 186 is a rotatable drive channel Since the first inclined surface 186 extends distally from the drive portion 178 of the hub 172, the hub axle HX It tapers away from the first inclination. The alignment portion 182 of the rotatable drive chuck 172 is first inclined It is separate from surface 186 and may have a second inclined surface 188 adjacent to the first inclined surface 186. The second inclined surface 188 is rotatable from the drive portion 178 of the rotatable drive chuck 172. The second inclined surface 188 extends distally toward the opening 176 of the drive chuck 172. Since it extends distally from the drive portion 178 of the rotatable drive chuck 172, the second inclined surface 18 8 tapers away from the hub axle HX. The first and second inclined surfaces 186 and 188 rotate The alignment edges 184 of the rotatable drive chuck 172 are collectively defined. As shown in Figures 23-25. In this configuration, the alignment portion 182 includes four alignment edges 184. Each alignment edge 184 is the first It is formed by the inclined surface 186 and the second inclined surface 188. In other configurations, it is rotatable The alignment portion 182 of the drive chuck 172 includes three or fewer alignment edges 184. In some configurations, the alignment portion 182 includes five or more alignment edges 184. And the second inclined surfaces 186, 188 are symmetric with respect to the aligned edge 184. In other configurations The first and second inclined surfaces 186 and 188 are not symmetrical with respect to the aligned edge 184.

[0060] In one exemplary configuration, a high-speed surgical bur assembly 102 and a surgical handpiece assembly are used. The connection with the 104 is described below. The user connects the high-speed surgical bur assembly 1 Grasp the nose tube 106 of 02 or another part of the high-speed surgical bar assembly 102 The proximal portion 108 of the nose tube 106 and the proximal region 112 of the drive shaft 110 The axial load is applied to the cavity 150 of the hub 146 of the surgical handpiece assembly 104. In other words, it can be inserted. The nose tube 106 and drive shaft 110 are particularly After entering the cavity 150 to a certain depth, the nose tube 106 is inserted into the surgical handpiece. The hub 146 of the hub 104 is restrained radially and axially, and the drive shaft 11 0 is half of the rotatable drive chuck 172 of the surgical handpiece assembly 104. It is suppressed in the radial and axial directions. The suppression will be explained in more detail below. As shown, the drive shaft 110 is the proximal and distal bur of the high-speed surgical bur assembly 102. The nose tube 106 is axially restrained by shings 116 and 118. The rotatable drive chuck 172 is coupled to the bushing 190 (Figure 1) connected to the hub 146. (See 5) It is axially restrained within the cavity 150 of the hub 146. When the nose tube 106 is axially restrained relative to the hub 146, the drive shaft The toe 110 is axially restrained against the rotatable drive chuck 172. Regarding the radial restraint of the tube 106 and the drive shaft 110, the drive shaft Before the nose tube 106 is radially restrained against the hub 146, the toe 110 rotates The drive chuck 172 is radially restricted to rotate. In other configurations, the drive shaft The toe 110 and nose tube 106 can be simultaneously restrained radially. Furthermore, other structures In this configuration, the nose tube 106 can be radially restrained in front of the drive shaft 110. After both the drive shaft 110 and the nose tube 106 are restrained radially, the nose tube The tube 106 is restrained in the axial direction. Below are the nose tube 106 and the drive shaft. One exemplary configuration for suppressing 110 is described.

[0061] The drive shaft 110 of the high-speed surgical bur assembly 102 is connected to the surgical handpiece assembly. As the drive shaft 110 enters the cavity 150 of the hub 146, the drive shaft 110 becomes a rotatable drive channel It enters through the opening 176 of the chuck 172. The opening 176 of the rotatable drive chuck 172 After passing through and entering, the outer surface of the alignment portion 140 of the drive shaft 110 is rotatable drive chuck The drive shaft 110 is adjacent to one of the alignment edges 184 of the alignment portion 182 of part 172. When the cavity 150 of the drive shaft 110 is continuously subjected to an axial load, the aligned portion 140 The engagement between the rotatable drive chuck 172 and the alignment edge 184 of the drive shaft 110 The drive portion 136 is oriented in the driving direction. In the driving direction, the drive surface of the drive shaft 110 138 engages with the drive surface 180 of the rotatable drive chuck 172 and the drive shaft 11 The 0 can be radially restrained by the rotatable drive chuck 172. The drive surface 138 When engaged with the drive surface 180, torque is transferred from the rotatable drive chuck 172 to the drive shaft. This can be transmitted to 110, and ultimately to the cutting tool 114.

[0062] In one configuration shown in Figure 26, the rotatable drive chuck 172 is a high-speed surgical bur When assembly 102 is coupled to the surgical handpiece assembly 104, it is rotatable. To provide an additional clearance between the capable drive chuck 172 and the proximal end of the drive shaft 110 A cutout 192 may be defined. The additional gap provided by the cutout 192 In between, the nose tube 106 is axially restrained by the hub 146, before the drive shaft 11 This can reduce the gap that causes engagement between the proximal end of 0 and the surface of the rotatable drive chuck 172. In other words, the additional gap provided by cutout 192 allows for rotational movement. The continuous insertion of the drive shaft 110 into the moving chuck 172 is performed by the nose tube 106 Ensure that the axial connection to B146 is not interfered with.

[0063] Alignment portion 140 of drive shaft 110 and alignment portion 18 of rotatable drive chuck 172 The engagement between 2 allows the drive shaft 110 to rotate in the driving direction, enabling the user to perform high-speed surgery Bar assembly 102 to the cavity 150 of the hub 146 of surgical handpiece assembly 104 This can only be achieved by applying load in the axial direction. In other words, , the drive shaft 110 can be oriented in the drive direction without requiring a user to grip the cutting tool 114 or another portion of the drive shaft 110 and operate the drive shaft 110 in the drive direction . In some cases, the drive shaft 110 may enter the cavity 150 of the hub 146 in the drive direction . In such cases, the alignment portion 140 of the drive shaft 110 must not contact the alignment portion 182 of the rotatable drive chuck 172, and the drive shaft 110 must not engage anything until the drive portion 136 of the drive shaft 110 engages the drive portion 178 of the rotatable drive chuck 172.

[0064] As shown in FIGS. 20 to 22, there is shown a nose tube that is restrained axially and radially 106. The drive shaft 110 in FIGS. 20 to 22 has been removed to better show the engagement between the nose tube 106 and the surgical handpiece assembly 104 Referring to FIG. 20, the surgical handpiece assembly 104 is shown with a hub 146, a radial alignment member 162, and a biasing member 152. The biasing member 152 is shown in an unbiased, compressed state . When the nose tube 106 enters the cavity 150 of the hub 146 of the surgical handpiece assembly 104, the nose tube 106 engages the biasing member 152 by adjoining the distal tapered surface 160 of the biasing member 152. When sufficient axial force is applied to the nose tube 106 to overcome the spring force of the biasing member 152 , the biasing member 152 expands to the biased state shown in FIG. 21 to accommodate the proximal portion 108 of the nose tube 106. In many cases, the protrusion 130 of the nose tube 106 may be misaligned and may engage the alignment wall 166 of the radial alignment member 162 Because of the possibility, the continuous axial force applied to the nose tube 106 is projected onto the projection 130. The relative rotation between the nose tube 106 and the hub 146 until it aligns with notch 164 It can bring about a change. In other words, the nose tube 106 allows the user to adjust the nose tube. Without gripping the nose tube 106 and manipulating it radially, The projection 130 of the flexure 106 is received by the notch 164 of the radial alignment member 162. It can be oriented to obtain.

[0065] In some configurations, as shown in Figure 22, the biasing member 152 is located in the nose tube 1 When 06 is at a specific depth within the cavity 150 of the hub 146, the recess of the nose tube 106 The proximal tapered surface 158 of the biasing member 152 is accepted by 124, and the nose tube 10 The proximal shoulder 126 of the recess 6 may be adjacent to the proximal tapered surface 158 of the biasing member 152 Adjacent to the proximal shoulder 126 of the recess 124 of the nose tube 106, the biasing member 152 When the distal end is adjacent to the distal shoulder 156 of the recess 154 of the hub 146, the biasing member 15 The spring force of 2 engages with the nose tube 106, and the projection 130 of the nose tube 106 This may be sufficient to push the radially aligning member 162 deeper into the notch 164. The component 152 has not returned to a compressed state without bias, and the projection 130 of the nose tube 106 , fully accepted by the notch 164 of the radial alignment member 162, as a result, hub If axial movement of the nose tube 106 in the proximal direction relative to 146 is prevented, The force member 152 continues to engage with the nose tube 106, and the nose tube relative to the hub 146 The hub 106 is restrained in the axial direction, and the hub 146, biasing member 152, radial alignment member 162, and a tight axial fit between the nose tube 106 can be maintained. Axial fitting can eliminate gaps that might otherwise exist. The gap can be formed from wear, the accumulation of tolerances, etc. In other configurations, the nose The recess 124 of the tube 106 receives the biasing member 152, and the biasing member 152 is connected to the hub 14 The depth of the nose tube 106 is suppressed relative to 6. In such a configuration, the biasing member 15 2 consists of a hub 146, a biasing member 152, a radial alignment member 162, and a nose tube 1 To maintain a tight axial fit between 06, the nose tube 106 remains engaged. That's not true.

[0066] In some cases, the nose tube 106 enters the cavity 150 of the hub 146 in the radial direction. Therefore, the projection 130 of the nose tube 106 does not rotate the nose tube 106. The radial alignment member 162 can be accepted by the notch 164. The projection 130 of the tube 106 does not contact the alignment wall 166 of the radial alignment member 162. There is a possibility that the protrusion 130 of the nose tube 106 is the protrusion 1 of the nose tube 106 30 does not engage with anything until it is accepted by the notch 164 of the radial alignment member 162. There is a possibility.

[0067] Furthermore, "include", "includes", and "include The term "(including)" means "to include (comprise)" or "to include (co The terms "comprises" and "comprising" have the same meaning. It will be understood that. Further, as used herein, terms such as "first", "second", "third" are used for non-limiting illustrative purposes of clarity and consistency to identify specific structural features and components. It will be understood that

[0068] Several arrangements have been described in the foregoing description. However, the arrangements described herein are not intended to be exhaustive or to limit the invention to the particular forms disclosed The terminology used is intended to be descriptive rather than limiting Many modifications and variations are possible in light of the above teachings, and the invention may be practiced otherwise than as specifically described The present disclosure is intended to be defined by independent claims with the specified features recited in the dependent claims,

[0069] The present disclosure is intended to be defined by independent claims with the specified features recited in the dependent claims, and the subject matter of a claim dependent on one independent claim may also be implemented in combination with another independent claim .

[0070] The present disclosure also includes the following clauses with specified features recited in dependent clauses that may be specifically implemented as described in more detail with reference to the foregoing configurations and drawings . Clause

[0071] I. A high-speed surgical bur assembly for connection to a surgical handpiece, comprising: a nose tube defining a lumen, the lumen having a proximal portion with a longitudinal axis, the nose tube having an outer surface defining a recess for receiving a biasing member for restraining the depth of the nose tube relative to the surgical handpiece, the nose tube including at least one projection distal to the recess, the projection configured to radially align the high-speed surgical bur assembly with the surgical handpiece; and A drive shaft having an aligned portion in its proximal region, configured to be at least partially positioned within a lumen and to align the drive portion of the drive shaft in a direction that engages with a rotatable drive chuck, wherein the drive shaft has a retaining portion distal to the aligned portion and the drive portion, the retaining portion having a diameter greater than the diameter of the lumen so that the drive shaft is held within the lumen of the nose tube, Includes a cutting tool coupled to the distal region of the drive shaft opposite the alignment portion. II. A high-speed surgical bur assembly of section I, wherein the projection extends radially to the peak with respect to the longitudinal axis of the proximal portion of the lumen, and the distance between the outer surface of the nose tube defining the recess and the longitudinal axis is smaller than the distance between the surface of the peak and the longitudinal axis. III. A high-speed surgical bur assembly according to any of Sections I-II, wherein at least one projection includes an inclined surface, and the peak of the projection allows the high-speed surgical bur assembly to be radially aligned with the surgical handpiece. IV. A high-speed surgical bur assembly of any of sections I-III, where the peak defines the distal radius of the inclined surface. V. A high-speed surgical bar assembly according to any of sections I to IV, wherein the aligned portion of the drive shaft engages with a rotatable drive chuck, defining a leading edge that aligns the drive portion of the drive shaft in a direction that engages with the rotatable drive chuck. VI. A high-speed surgical bar assembly of section V, wherein the leading edge is defined between at least two curved surfaces to allow the drive portion to cam in a direction that engages with a rotatable drive chuck. VII. A high-speed surgical bur assembly of section VI, wherein at least two of the curved surfaces are asymmetrical across the longitudinal axis. VIII. A high-speed surgical handpiece assembly, A hub having a proximal end and a distal end opposite the proximal end, wherein the hub has an inner surface defining a bore extending from the distal end to the proximal end, and the inner surface defines an aligned channel communicating with the bore extending from the distal end to the proximal end, A retaining element positioned within the bore proximal to the alignment channel, A rotatable drive chuck positioned in a bore proximal to a retaining element, comprising a rotatable drive chuck having a drive chamber, A nose tube defining a lumen extending between a proximal end and a distal end, wherein the nose tube has an outer surface defining a recess surrounding the nose tube, which restricts the depth of the nose tube relative to the hub when the recess is engaged by a retaining element, and the nose tube includes at least one projection, the projection being configured to be received by an alignment channel to align the nose tube with the hub, A drive shaft having an alignment portion that is at least partially positioned within the lumen of the nose tube and configured to align the drive portion of the drive shaft in a direction that engages with the drive chamber of a rotatable drive chuck, A high-speed surgical handpiece assembly including a cutting tool coupled to a drive shaft. IX. A high-speed surgical handpiece assembly of Section VIII, wherein the aligned portion of the drive shaft defines a leading edge that engages with the inclined surface of the rotatable drive chuck, thereby aligning the drive portion of the drive shaft in a direction that engages with the drive chamber of the rotatable drive chuck. X. A high-speed surgical handpiece assembly of any of sections VIII to IX, in which the retaining function includes a biasing member. XI. A high-speed surgical handpiece assembly of any of sections VIII-X, in which the nose tube includes a monolithic structure. XII. A high-speed surgical handpiece assembly of section XI, with recesses and protrusions formed from a metal material. XIII. A high-speed surgical handpiece assembly of section XII, in which a monolithic nose tube is formed of metal material with protrusions and recesses. Furthermore, the technical concepts that can be understood from the above embodiments are described below. [Aspect 1] A surgical handpiece system, A high-speed surgical bur assembly, A nose tube defining a lumen extending between a proximal end and a distal end, having a proximal portion extending along an axis, the proximal portion having an outer surface defining a nose tube recess, and including a projection positioned proximal to the nose tube recess, A drive shaft is positioned at least partially within the lumen of the nose tube and configured to rotate relative to the nose tube, A cutting tool coupled to the distal region of the drive shaft, configured to rotate together with the drive shaft relative to the nose tube, A high-speed surgical bur assembly, A surgical handpiece assembly, A hub having a bore that defines a cavity for receiving the proximal portion of the nose tube of the high-speed surgical bar assembly, A biasing member disposed within the cavity of the hub, configured to be received by the nose tube recess of the nose tube in order to suppress the depth of the nose tube of the high-speed surgical bar assembly within the cavity of the hub relative to the hub, A radial alignment member disposed within the cavity of the hub proximal to the biasing member, wherein a notch for receiving the projection is defined to suppress the radial orientation of the nose tube relative to the hub, Includes a surgical handpiece assembly, A surgical handpiece system, including [specific component]. [Aspect 2] The surgical handpiece system according to embodiment 1, wherein the projection of the proximal portion of the nose tube extends proximal and substantially parallel to the axis. [Aspect 3] The surgical handpiece system according to embodiment 1 or 2, wherein the proximal end of the projection of the proximal portion of the nose tube includes a rounded surface. [Aspect 4] A surgical handpiece system according to any one of embodiments 1 to 3, wherein the projection of the proximal portion of the nose tube includes a flat surface parallel to the axis of the proximal portion of the nose tube, and the flat surface is configured to be adjacent to the surface of the radial alignment member that defines the notch for suppressing the radial orientation of the nose tube with respect to the hub. [Aspect 5] The surgical handpiece system according to any one of embodiments 1 to 4, wherein the outer surface of the proximal portion of the nose tube has a proximal shoulder defining the proximal end of the recess, and the proximal shoulder tapers to a point. [Aspect 6] The surgical handpiece system according to embodiment 5, wherein the bore of the hub defines a hub recess communicating with the cavity, the bore includes a distal shoulder for defining the distal end of the hub recess, and the biasing member is configured to engage with the distal shoulder of the hub and the proximal shoulder of the nose tube to push the projection of the nose tube toward the notch of the radial alignment member. [Aspect 7] A surgical handpiece system according to any one of embodiments 1 to 6, wherein the proximal bushing is at least partially disposed within the lumen of the nose tube, and the proximal bushing further comprises a proximal bushing surrounding a portion of the drive shaft. [Aspect 8] The surgical handpiece system according to embodiment 7, wherein the drive shaft further includes a proximal region, the proximal region of the drive shaft includes a retaining portion located proximal to the proximal bushing, the retaining portion having an outer diameter larger than the inner diameter of the proximal bushing, and preventing the drive shaft from moving distally relative to the nose tube. [Aspect 9] A surgical handpiece system according to any one of embodiments 1 to 8, wherein the distal bushing is coupled to the distal region of the nose tube, and the distal bushing further comprises a distal bushing that surrounds a portion of the drive shaft. [Aspect 10] The surgical handpiece system according to embodiment 9, wherein the cutting tool has an outer diameter larger than the inner diameter of the distal bushing in order to prevent the drive shaft from moving proximal to the nose tube. [Aspect 11] The surgical handpiece system according to any one of embodiments 1 to 10, wherein the cutting tool includes a bur. [Aspect 12] The surgical handpiece system according to any one of embodiments 8 to 11, wherein the proximal region of the drive shaft is located outside the lumen of the nose tube. [Aspect 13] A high-speed surgical bur assembly configured to cut tissue and connect to a surgical handpiece assembly, A nose tube defining a lumen extending between a proximal end and a distal end, having a proximal portion extending along an axis, the proximal portion having an outer surface defining a recess for receiving a biasing member of the surgical handpiece assembly, including a projection positioned proximal to the recess, which restricts the depth of the nose tube relative to the surgical handpiece assembly, and the projection is configured to restrict the radial orientation of the nose tube relative to the surgical handpiece assembly. A drive shaft, at least partially positioned within the lumen of the nose tube and configured to rotate relative to the nose tube, having a drive portion in the proximal region of the drive shaft for engaging with a rotatable drive chuck of the surgical handpiece assembly, A cutting tool coupled to the distal region of the drive shaft opposite the drive portion, configured to rotate with the drive shaft relative to the nose tube in response to the rotation of the rotatable drive chuck of the surgical handpiece assembly, A high-speed surgical bur assembly, including a bur assembly for advanced surgery. [Aspect 14] The projection of the proximal portion of the nose tube extends proximal and substantially parallel to the axis, according to embodiment 13, for a high-speed surgical bur assembly. [Aspect 15] The high-speed surgical bur assembly according to embodiment 13 or 14, wherein the proximal end of the projection of the proximal portion of the nose tube includes a rounded surface. [Aspect 16] The high-speed surgical bur assembly according to any one of embodiments 13 to 15, wherein the projection of the proximal portion of the nose tube includes a flat surface parallel to the axis of the proximal portion of the nose tube, and the flat surface is configured to be adjacent to the surface of the surgical handpiece assembly to prevent relative rotation between the nose tube and the surgical handpiece assembly. [Aspect 17] The high-speed surgical bur assembly according to any one of embodiments 13 to 16, wherein the drive shaft further includes an aligned portion proximal to the drive portion of the drive shaft, the aligned portion being configured to align the drive portion of the drive shaft with the rotatable drive chuck of the surgical handpiece assembly, and to enable engagement between the drive portion of the drive shaft and the rotatable drive chuck. [Aspect 18] The high-speed surgical bur assembly according to embodiment 17, wherein the alignment portion has an outer surface that tapers toward the shaft as the alignment portion extends from the drive portion to the proximal end of the drive shaft, and the alignment portion is configured to engage with the rotatable drive chuck of the surgical handpiece assembly so that the drive portion of the drive shaft aligns the drive portion in the driving direction for engagement with the rotatable drive chuck. [Aspect 19] The high-speed surgical bur assembly according to embodiment 17 or 18, wherein the alignment portion defines a notch extending distally from the proximal end of the drive shaft to reduce contact between the alignment portion of the drive shaft and the rotatable drive chuck while the alignment portion engages with the rotatable drive chuck. [Aspect 20] A high-speed surgical bur assembly according to any one of embodiments 17 to 19, wherein the alignment portion includes a proximal edge for engaging with the rotatable drive chuck of the surgical handpiece assembly to align the drive portion of the drive shaft in the driving direction so that the drive portion of the drive shaft engages with the rotatable drive chuck. [Aspect 21] The high-speed surgical bur assembly according to embodiment 20, wherein the alignment portion includes a proximal surface positioned proximal to the proximal edge to prevent the proximal edge from further engaging with the rotatable drive chuck of the surgical handpiece assembly after the drive portion has been aligned in the drive direction. [Aspect 22] The high-speed surgical bur assembly according to embodiment 21, wherein the proximal surface includes a plane perpendicular to the axis. [Aspect 23] The high-speed surgical bur assembly according to any one of embodiments 13 to 22, wherein the outer surface of the proximal portion of the nose tube has a proximal shoulder defining the proximal end of the recess, the proximal shoulder is tapered, and the proximal shoulder is configured to engage with the biasing member of the surgical handpiece assembly to push the nose tube into the surgical handpiece assembly. [Aspect 24] A high-speed surgical bar assembly according to any one of embodiments 13 to 23, further comprising a proximal bushing at least partially disposed within the lumen of the nose tube, the proximal bushing further comprising a proximal bushing surrounding a portion of the drive shaft. [Pattern 25] The high-speed surgical bar assembly according to embodiment 24, wherein the drive shaft further includes a retaining portion located distal to the drive portion and proximal to the proximal bushing, the retaining portion having an outer diameter larger than the inner diameter of the proximal bushing, and preventing the drive shaft from moving distally with respect to the nose tube. [Aspect 26] A high-speed surgical bar assembly according to any one of embodiments 13 to 25, wherein the distal bushing is coupled to the distal region of the nose tube, the distal bushing further comprises a distal bushing surrounding a portion of the drive shaft. [Aspect 27] The high-speed surgical bur assembly according to embodiment 26, wherein the cutting tool has an outer diameter larger than the inner diameter of the distal bushing in order to prevent the drive shaft from moving proximal to the nose tube. [Aspect 28] The cutting tool comprises a bur, as described in any one of embodiments 13 to 27. [Aspect 29] The high-speed surgical bar assembly according to any one of embodiments 13 to 28, wherein the proximal region of the drive shaft is located outside the lumen of the nose tube. [Aspect 30] A high-speed surgical bur assembly configured to cut tissue and connect to a surgical handpiece assembly, A nose tube defining a lumen extending between a proximal end and a distal end, having a proximal portion configured to be coupled to the surgical handpiece assembly, the proximal portion including a projection configured to suppress the radial orientation of the nose tube relative to the surgical handpiece assembly, A drive shaft, at least partially disposed within the lumen of the nose tube and configured to rotate relative to the nose tube, having a proximal region extending along its axis, the proximal region being, A drive unit for engaging the rotatable drive chuck of the surgical handpiece assembly in the drive direction, An alignment portion of the drive shaft located proximal to the drive portion, having an outer surface that tapers toward the shaft as it extends from the drive portion to the proximal end of the drive shaft, and configured to engage with the rotatable drive chuck, aligning the drive portion of the drive shaft in the drive direction for engagement with the rotatable drive chuck, and defining a notch extending distally from the proximal end of the drive shaft to reduce contact between the alignment portion of the drive shaft and the rotatable drive chuck during engagement of the alignment portion with the rotatable drive chuck, Includes a drive shaft, A cutting tool coupled to the distal region of the drive shaft opposite to the proximal region of the drive shaft, configured to rotate with the drive shaft relative to the nose tube in response to the rotation of the rotatable drive chuck of the surgical handpiece assembly, A high-speed surgical bur assembly, including a bur assembly for advanced surgery. [Aspect 31] The high-speed surgical bur assembly according to embodiment 30, wherein the alignment portion includes a proximal edge for engaging with the rotatable drive chuck of the surgical handpiece assembly in order to align the drive portion of the drive shaft in the driving direction so that the drive portion of the drive shaft engages with the rotatable drive chuck. [Aspect 32] The high-speed surgical bur assembly according to embodiment 31, wherein the alignment portion includes a proximal surface positioned proximal to the proximal edge to prevent the proximal edge from further engaging with the rotatable drive chuck of the surgical handpiece assembly after the drive portion has been aligned in the drive direction. [Aspect 33] The high-speed surgical bur assembly according to embodiment 32, wherein the proximal surface includes a plane perpendicular to the axis. [Aspect 34] The projection of the proximal portion of the nose tube extends proximal and substantially parallel to the axis, according to any one of embodiments 30 to 33, for a high-speed surgical bar assembly. [Aspect 35] The high-speed surgical bur assembly according to any one of embodiments 30 to 34, wherein the proximal end of the projection of the proximal portion of the nose tube includes a rounded surface. [Aspect 36] The high-speed surgical bur assembly according to any one of embodiments 30 to 35, wherein the projection of the proximal portion of the nose tube includes a flat surface parallel to the axis of the proximal portion of the nose tube, and the flat surface is configured to be adjacent to the surface of the surgical handpiece assembly to prevent relative rotation between the nose tube and the surgical handpiece assembly. [Aspect 37] The high-speed surgical bur assembly according to any one of embodiments 30 to 36, wherein the proximal portion of the nose tube has an outer surface that defines a recess for receiving a biasing member of the surgical handpiece assembly in order to limit the depth of the nose tube relative to the surgical handpiece assembly. [Aspect 38] The high-speed surgical bur assembly according to embodiment 37, wherein the outer surface of the proximal portion of the nose tube has a proximal shoulder defining the proximal end of the recess, the proximal shoulder tapers, and the proximal shoulder is configured to engage with the biasing member of the surgical handpiece assembly to push the nose tube into the surgical handpiece assembly. [Aspect 39] A high-speed surgical bar assembly according to any one of embodiments 30 to 38, further comprising a proximal bushing at least partially disposed within the lumen of the nose tube, the proximal bushing further comprising a proximal bushing surrounding a portion of the drive shaft. [Aspect 40] The high-speed surgical bur assembly according to embodiment 39, wherein the drive shaft is distal to the drive portion and further includes a retaining portion proximal to the proximal bushing, the retaining portion having an outer diameter larger than the inner diameter of the proximal bushing to prevent the drive shaft from moving distal to the nose tube. [Aspect 41] A high-speed surgical bar assembly according to any one of embodiments 30 to 40, comprising a distal bushing coupled to the distal region of the nose tube, wherein the distal bushing further comprises a distal bushing surrounding a portion of the drive shaft. [Aspect 42] The high-speed surgical bur assembly according to embodiment 41, wherein the cutting tool has an outer diameter larger than the inner diameter of the distal bushing in order to prevent the drive shaft from moving proximal to the nose tube. [Aspect 43] The cutting tool comprises a bur, as described in any one of embodiments 30 to 42, for high-speed surgical bur assembly. [Aspect 44] The high-speed surgical bar assembly according to any one of embodiments 30 to 43, wherein the proximal region of the drive shaft is located outside the lumen of the nose tube. [Aspect 45] A surgical handpiece assembly configured to be coupled to a high-speed surgical bar assembly having a nose tube and a drive shaft rotatably coupled to the nose tube, A hub having a bore that defines a cavity for receiving the proximal portion of the nose tube, A biasing member disposed within the cavity of the hub, configured to engage with the nose tube in order to suppress the depth of the nose tube within the cavity of the hub relative to the hub, A radial alignment member disposed within the cavity of the hub proximal to the biasing member, having a notch for receiving a projection of the nose tube to suppress the radial orientation of the nose tube relative to the hub, having an alignment wall extending distally from the notch, engaging with the projection of the nose tube so that the notch can receive the projection of the nose tube, and aligning the nose tube radially; A surgical handpiece assembly, including the following: [Aspect 46] A surgical handpiece assembly according to embodiment 45, further comprising a rotatable drive chuck configured to rotate by a motor around an axis, the rotatable drive chuck being positioned within the cavity of the hub and configured to engage with the drive shaft to rotate relative to the hub, and defining an opening for at least partially receiving the drive shaft. [Aspect 47] The surgical handpiece assembly according to embodiment 46, wherein the rotatable drive chuck includes a drive portion located proximal to the opening, the drive portion having at least two drive surfaces configured to engage the drive shaft in the drive direction and rotate the drive shaft. [Aspect 48] The surgical handpiece assembly according to embodiment 47, wherein the rotatable drive chuck includes an alignment portion positioned between the drive portion of the rotatable drive chuck and the opening, the alignment portion having an alignment edge extending distally from the drive portion of the rotatable drive chuck toward the opening of the rotatable drive chuck, and the alignment edge tapers away from the axis as it extends distally from the drive portion of the rotatable drive chuck. [Aspect 49] The surgical handpiece assembly according to embodiment 48, wherein the alignment edge of the alignment portion of the rotatable drive chuck is configured to engage with the drive shaft so that the drive shaft is oriented in the driving direction, in order to engage the drive shaft with the at least two driving surfaces of the drive portion of the rotatable drive chuck. [Aspect 50] The alignment portion of the rotatable drive chuck has a first inclined surface extending distally from the drive portion of the rotatable drive chuck toward the opening of the rotatable drive chuck, wherein the first inclined surface tapers away from the axis as it extends distally from the drive portion of the rotatable drive chuck, and the alignment portion of the rotatable drive chuck has a second inclined surface separate from and adjacent to the first inclined surface extending distally from the drive portion of the rotatable drive chuck toward the opening of the rotatable drive chuck, wherein the second inclined surface tapers away from the axis as it extends distally from the drive portion of the rotatable drive chuck, and the first and second inclined surfaces collectively define the alignment edge of the rotatable drive chuck. [Aspect 51] A surgical handpiece assembly according to any one of embodiments 45 to 50, wherein the bore defines a recess communicating with the cavity, the bore includes a distal shoulder for defining the distal end of the recess, and the distal shoulder is configured to engage with the biasing member of the surgical handpiece assembly to push the nose tube toward the radial alignment member. [Aspect 52] A surgical handpiece system, A high-speed surgical bur assembly, A nose tube that defines the lumen extending between the proximal and distal ends, A drive shaft is positioned at least partially within the lumen of the nose tube and configured to rotate relative to the nose tube, having a proximal region extending along the drive shaft axis. A cutting tool coupled to the distal region of the drive shaft, configured to rotate together with the drive shaft relative to the nose tube, A high-speed surgical bur assembly, A surgical handpiece assembly, A hub having a bore that defines a cavity for receiving the proximal end of the nose tube and the proximal region of the drive shaft of the high-speed surgical bar assembly, A rotatable drive chuck configured to rotate by a motor around a hub axis, positioned within the cavity of the hub and configured to rotate relative to the hub, and defining an opening for receiving the proximal region of the drive shaft, A drive portion located near the opening, having at least two drive surfaces configured to engage with the drive shaft in the driving direction to rotate the drive shaft, Alignment portion disposed between the drive portion and the opening of the rotatable drive chuck, having an alignment edge extending distally from the drive portion toward the opening of the rotatable drive chuck, wherein the alignment edge tapers away from the hub axis as it extends distally from the drive portion of the rotatable drive chuck, A rotatable drive chuck, Includes a surgical handpiece assembly, Includes, A surgical handpiece system in which the drive shaft is configured to engage with the alignment edge of the alignment portion of the rotatable drive chuck so as to engage the drive shaft with the at least two drive surfaces of the drive portion of the rotatable drive chuck, thereby orienting the drive shaft in the driving direction. [Aspect 53] The surgical handpiece system according to embodiment 52, wherein the drive shaft includes a drive portion and an alignment portion proximal to the drive portion, the alignment portion of the drive shaft is configured to engage with the alignment edge of the alignment portion of the rotatable drive chuck to orient the drive shaft in the driving direction in order to engage the drive portion of the drive shaft with the at least two drive surfaces of the drive portion of the rotatable drive chuck. [Aspect 54] The surgical handpiece system according to embodiment 53, wherein the aligned portion of the drive shaft has an outer surface that tapers toward the drive shaft axis as the aligned portion extends from the drive portion to the proximal end of the drive shaft, and the outer surface of the aligned portion is configured to engage with the aligned edge of the aligned portion of the rotatable drive chuck to engage the drive portion of the drive shaft with the at least two drive surfaces of the drive portion of the rotatable drive chuck, thereby orienting the drive shaft in the driving direction. [Aspect 55] The surgical handpiece system according to embodiment 53 or 54, wherein the aligned portion of the drive shaft defines a notch extending distally from the proximal end of the drive shaft, thereby reducing contact between the aligned portion of the drive shaft and the aligned portion of the rotatable drive chuck during engagement with the aligned portion of the rotatable drive chuck. [Aspect 56] A high-speed surgical bur assembly according to any one of embodiments 53 to 55, wherein the aligned portion of the drive shaft engages with the aligned edge of the aligned portion of the rotatable drive chuck of the surgical handpiece assembly, and includes a proximal edge for aligning the drive portion in the driving direction such that the drive portion of the drive shaft engages with the drive portion of the rotatable drive chuck. [Aspect 57] The high-speed surgical bur assembly according to embodiment 56, wherein the aligned portion of the drive shaft includes a proximal surface positioned proximal to the proximal edge to prevent the proximal edge from further engaging with the rotatable drive chuck of the surgical handpiece assembly after the drive portion has been aligned in the driving direction. [Aspect 58] The high-speed surgical bur assembly according to embodiment 57, wherein the proximal surface of the aligned portion of the drive shaft includes a plane perpendicular to the drive shaft axis. [Aspect 59] A surgical handpiece system according to any one of embodiments 52 to 58, further comprising a proximal bushing at least partially disposed within the lumen of the nose tube, the proximal bushing further comprising a proximal bushing surrounding a portion of the drive shaft. [Aspect 60] The surgical handpiece system according to embodiment 59, wherein the drive shaft is distal to the drive portion and further includes a retaining portion proximal to the proximal bushing, the retaining portion having an outer diameter larger than the inner diameter of the proximal bushing, and preventing the drive shaft from moving distally with respect to the nose tube. [Aspect 61] A surgical handpiece system according to any one of embodiments 52 to 60, wherein the distal bushing is coupled to the distal region of the nose tube, and the distal bushing further comprises a distal bushing surrounding a portion of the drive shaft. [Aspect 62] The surgical handpiece system according to embodiment 61, wherein the cutting tool has an outer diameter larger than the inner diameter of the distal bushing in order to prevent the drive shaft from moving proximal to the nose tube. [Aspect 63] The surgical handpiece system according to any one of embodiments 52 to 62, wherein the cutting tool includes a bur. [Aspect 64] The aligning portion of the rotatable drive chuck has a first inclined surface extending distally from the drive portion of the rotatable drive chuck toward the opening of the rotatable drive chuck, wherein the first inclined surface tapers away from the hub axis as it extends distally from the drive portion of the rotatable drive chuck, and the aligning portion of the rotatable drive chuck has a second inclined surface separate from and adjacent to the first inclined surface extending distally from the drive portion of the rotatable drive chuck toward the opening of the rotatable drive chuck, wherein the second inclined surface tapers away from the hub axis as it extends distally from the drive portion of the rotatable drive chuck, and the first and second inclined surfaces collectively define the aligning edge of the rotatable drive chuck, according to any one of embodiments 52 to 63. [Aspect 65] The surgical handpiece system according to any one of embodiments 52 to 64, wherein the proximal region of the drive shaft is located outside the lumen of the nose tube. [Aspect 66] A high-speed surgical bur assembly for connection to a surgical handpiece assembly, A drive shaft having a proximal end and a distal end, A nose tube having a first region defining a lumen for at least partially receiving the drive shaft between the proximal and distal ends, and a second region extending monolithically from the first region for coupling the drive shaft at the proximal end to the surgical handpiece, wherein the second region includes an alignment function configured to radially align the nose tube to the surgical handpiece assembly, and the second region includes a retaining function configured to axially hold the nose tube to the surgical handpiece assembly, A cutting tool is coupled to the drive shaft at the distal end of the drive shaft, A high-speed surgical bur assembly, including a bur assembly for advanced surgery. [Aspect 67] The high-speed surgical bur assembly according to embodiment 8, wherein the alignment function includes a projection for engaging with the hub of the surgical handpiece assembly to align the nose tube with the surgical handpiece assembly. [Pattern 68] The high-speed surgical bur assembly according to embodiment 66 or 67, wherein the first and second regions are formed from a metallic material. [Aspect 69] The alignment and holding functions are formed from the metal material forming the first and second regions, according to the high-speed surgical bur assembly according to embodiment 68. [Aspect 70] The high-speed surgical bur assembly according to any one of embodiments 66 to 69, wherein the drive shaft includes an aligned portion at the proximal end of the drive shaft and a drive portion adjacent to the aligned portion, the aligned portion defining a leading edge that engages with the inclined surface of the rotatable drive chuck of the surgical handpiece, thereby aligning the drive portion of the drive shaft in a direction that engages with the rotatable drive chuck.

Claims

1. A high-speed surgical bur assembly configured to cut tissue and connect to a surgical handpiece assembly, A nose tube defining a lumen extending between a proximal end and a distal end, having a proximal portion extending along an axis, the proximal portion having an outer surface defining a recess for receiving a biasing member of the surgical handpiece assembly, including a projection positioned proximal to the recess, which restricts the depth of the nose tube relative to the surgical handpiece assembly, and the projection is configured to restrict the radial orientation of the nose tube relative to the surgical handpiece assembly. A drive shaft, at least partially positioned within the lumen of the nose tube and configured to rotate relative to the nose tube, having a drive portion in the proximal region of the drive shaft for engaging with a rotatable drive chuck of the surgical handpiece assembly, A cutting tool coupled to the distal region of the drive shaft opposite the drive portion, configured to rotate with the drive shaft relative to the nose tube in response to the rotation of the rotatable drive chuck of the surgical handpiece assembly, Includes, A high-speed surgical bur assembly wherein the projection of the proximal portion of the nose tube includes a flat surface parallel to the axis of the proximal portion of the nose tube, and the flat surface is configured to be adjacent to the surface of the surgical handpiece assembly to prevent relative rotation between the nose tube and the surgical handpiece assembly.

2. The projection of the proximal portion of the nose tube extends proximal and substantially parallel to the axis, according to claim 1, for high-speed surgical bur assembly.

3. The high-speed surgical bur assembly according to claim 1, wherein the proximal end of the projection of the proximal portion of the nose tube includes a rounded surface.

4. The high-speed surgical bur assembly according to any one of claims 1 to 3, wherein the drive shaft further includes an aligned portion proximal to the drive portion of the drive shaft, the aligned portion being configured to align the drive portion of the drive shaft with the rotatable drive chuck of the surgical handpiece assembly, and to enable engagement between the drive portion of the drive shaft and the rotatable drive chuck.

5. The high-speed surgical bur assembly according to claim 4, wherein the alignment portion has an outer surface that tapers toward the shaft as the alignment portion extends from the drive portion to the proximal end of the drive shaft, and the alignment portion is configured to engage with the rotatable drive chuck of the surgical handpiece assembly to align the drive portion of the drive shaft in the driving direction for engagement with the rotatable drive chuck.

6. A high-speed surgical bur assembly configured to cut tissue and connect to a surgical handpiece assembly, A nose tube defining a lumen extending between a proximal end and a distal end, having a proximal portion extending along an axis, the proximal portion having an outer surface defining a recess for receiving a biasing member of the surgical handpiece assembly, including a projection positioned proximal to the recess, which restricts the depth of the nose tube relative to the surgical handpiece assembly, and the projection is configured to restrict the radial orientation of the nose tube relative to the surgical handpiece assembly. A drive shaft, at least partially positioned within the lumen of the nose tube and configured to rotate relative to the nose tube, having a drive portion in the proximal region of the drive shaft for engaging with a rotatable drive chuck of the surgical handpiece assembly, A cutting tool coupled to the distal region of the drive shaft opposite the drive portion, configured to rotate with the drive shaft relative to the nose tube in response to the rotation of the rotatable drive chuck of the surgical handpiece assembly, Includes, The drive shaft further includes an aligned portion proximal to the drive portion of the drive shaft, the aligned portion being configured to align the drive portion of the drive shaft with the rotatable drive chuck of the surgical handpiece assembly, and to enable engagement between the drive portion of the drive shaft and the rotatable drive chuck. A high-speed surgical bur assembly comprising an alignment portion defining a notch extending distally from the proximal end of the drive shaft to reduce contact between the alignment portion of the drive shaft and the rotatable drive chuck while the alignment portion engages with the rotatable drive chuck.

7. The high-speed surgical bur assembly according to claim 4, wherein the alignment portion includes a proximal edge for engaging with the rotatable drive chuck of the surgical handpiece assembly in order to align the drive portion of the drive shaft in the driving direction so that the drive portion of the drive shaft engages with the rotatable drive chuck.

8. The high-speed surgical bur assembly according to claim 7, wherein the alignment portion includes a proximal surface positioned proximal to the proximal edge to prevent the proximal edge from further engaging with the rotatable drive chuck of the surgical handpiece assembly after the drive portion has been aligned in the drive direction.

9. The high-speed surgical bur assembly according to claim 8, wherein the proximal surface includes a plane perpendicular to the axis.

10. A high-speed surgical bur assembly configured to cut tissue and connect to a surgical handpiece assembly, A nose tube defining a lumen extending between a proximal end and a distal end, having a proximal portion extending along an axis, the proximal portion having an outer surface defining a recess for receiving a biasing member of the surgical handpiece assembly, including a projection positioned proximal to the recess, which restricts the depth of the nose tube relative to the surgical handpiece assembly, and the projection is configured to restrict the radial orientation of the nose tube relative to the surgical handpiece assembly. A drive shaft, at least partially positioned within the lumen of the nose tube and configured to rotate relative to the nose tube, having a drive portion in the proximal region of the drive shaft for engaging with a rotatable drive chuck of the surgical handpiece assembly, A cutting tool coupled to the distal region of the drive shaft opposite the drive portion, configured to rotate with the drive shaft relative to the nose tube in response to the rotation of the rotatable drive chuck of the surgical handpiece assembly, Includes, A high-speed surgical bur assembly wherein the outer surface of the proximal portion of the nose tube has a proximal shoulder defining the proximal end of the recess, the proximal shoulder is tapered, and the proximal shoulder is configured to engage with the biasing member of the surgical handpiece assembly to push the nose tube into the surgical handpiece assembly.

11. The high-speed surgical bar assembly according to any one of claims 1 to 3, further comprising a proximal bushing at least partially disposed within the lumen of the nose tube, the proximal bushing surrounding a portion of the drive shaft.

12. The high-speed surgical bar assembly according to claim 11, wherein the drive shaft further includes a retaining portion located distal to the drive portion and proximal to the proximal bushing, the retaining portion having an outer diameter larger than the inner diameter of the proximal bushing, and preventing the drive shaft from moving distal to the nose tube.

13. A high-speed surgical bur assembly configured to cut tissue and connect to a surgical handpiece assembly, A nose tube defining a lumen extending between a proximal end and a distal end, having a proximal portion extending along an axis, the proximal portion having an outer surface defining a recess for receiving a biasing member of the surgical handpiece assembly, including a projection positioned proximal to the recess, which restricts the depth of the nose tube relative to the surgical handpiece assembly, and the projection is configured to restrict the radial orientation of the nose tube relative to the surgical handpiece assembly. A drive shaft, at least partially positioned within the lumen of the nose tube and configured to rotate relative to the nose tube, having a drive portion in the proximal region of the drive shaft for engaging with a rotatable drive chuck of the surgical handpiece assembly, A cutting tool coupled to the distal region of the drive shaft opposite the drive portion, configured to rotate with the drive shaft relative to the nose tube in response to the rotation of the rotatable drive chuck of the surgical handpiece assembly, Includes, A high-speed surgical bur assembly comprising a distal bushing coupled to the distal region of the nose tube, the distal bushing further comprising a distal bushing surrounding a portion of the drive shaft.

14. The high-speed surgical bur assembly according to claim 13, wherein the cutting tool has an outer diameter larger than the inner diameter of the distal bushing in order to prevent the drive shaft from moving proximal to the nose tube.

15. The high-speed surgical bur assembly according to any one of claims 1 to 3, wherein the cutting tool includes a bur.

16. The high-speed surgical bar assembly according to any one of claims 1 to 3, wherein the proximal region of the drive shaft is located outside the lumen of the nose tube.

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