Medical Tool Holder

Abstract

The present invention relates to a medical tool holder to which an impactor, a reaming machine, or the like used in surgical operations is attached, and more specifically to a medical tool holder that has a simple and concise structure, satisfies operational stability and durability, and can be used interchangeably. The medical tool holder according to the present invention includes a medical tool having a tool shaft, a holder body having a tool mounting hole formed therein for insertion of the medical tool, and tool holding means for holding the medical tool inserted into the holder body, wherein the tool holding means includes a tool holding and guiding member for holding the tool shaft and guiding its movement.

Description

[Technical Field]

[0001] The present invention relates to a medical tool holder to which an impactor, a reaming machine, or the like used in surgical operations is attached, and more particularly to a medical tool holder that has a simple and concise structure, satisfies operational stability and durability, and can be used interchangeably. [Background technology]

[0002] In general, surgical treatments for joint diseases include arthroscopic surgery and chondrocyte transplantation, and in severe cases, artificial joint surgery is required. However, artificial joint surgery is typically performed manually by medical staff or using a robot.

[0003] Robotic artificial joint surgery is a surgical method in which, according to information input into a computer, the cutter of a cutting device attached to the end of the robot's position-adjustable arm is rotated to cut the bone at the joint area and then an artificial joint (implant) is attached.The method uses cutting tools such as a drill, a reamer for enlarging the hole, and an impactor for providing a press-fit force.

[0004] Among artificial joint surgeries, knee replacement surgery has become commonplace, and recently, hip replacement surgery has also been gradually increasing.

[0005] Artificial hip joint surgery is usually performed by preparing the acetabulum of the hip joint using a reamer, inserting an artificial acetabulum cup, pressing it in and fixing it using an impactor, and then connecting an artificial femoral head.

[0006] Meanwhile, the aforementioned reamer is classified into a straight reamer, which has a linear external shape, and a curved offset reamer, which has a curved external shape and is also called an offset reamer.

[0007] The impactor is classified into a straight impactor handle, which has a linear external shape, and a curved impactor handle, which has a curved external shape.

[0008] As described above, hip replacement surgery requires a variety of surgical tools, such as a straight reamer, an offset reamer, a straight impactor handle, and a curved impactor handle, and therefore requires a medical tool holder that can stably hold and interchangeably use the surgical tools.

[0009] Such medical tool holders have been proposed in Korea under Patent Registration No. 10-1609281 (Registration Date: 2016.03.30), entitled "Tools, Kits of Parts for Multifunctional Tools, and Robot Systems for Multifunctional Tools." However, they have drawbacks, such as an excessive number of components and a complex structure, which increases manufacturing and maintenance costs, and they are prone to malfunction, which can be an obstacle to stable surgery.

[0010] In addition, conventional medical tool holders have a problem in that when an impactor is installed and medical staff strike the impactor to perform a procedure, if the striking direction of the hammer deviates from the axial direction, which is the longitudinal direction of the impactor, and an impact force is applied to the impactor in an oblique direction (if it deviates), it can cause damage to the holder and impactor.

[0011] Furthermore, if the hammer comes off, the diagonal impact force will be applied to the artificial acetabular cup, which will not only have a negative impact on the surgery, but the impact force of the hammer will also be transmitted to the medical staff (or robot) holding the holder, which could result in injury or damage to the robot. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Korean Patent Publication No. 10-2020-0115518 "End effector, system and method for impacting a prosthesis guided by a surgical robot" [Patent Document 2] US Patent US8,753,346B2 "Tool, Kit-of-Parts for Multi-Functional Tool, and Robotic System for Same" [Patent Document 3] Korean Patent Publication No. 10-2020-0115518 "End effector, system and method for impacting a prosthesis guided by a surgical robot" Summary of the Invention [Problem to be solved by the invention]

[0013] The present invention has been proposed in light of the above-mentioned problems, and its object is to provide a medical tool holder that has a simple and concise structure, satisfies operational stability and durability, and can be used interchangeably.

[0014] Another object of the present invention is to provide a medical tool holder that is capable of absorbing and cushioning abnormal impact forces applied to a medical tool. [Means for solving the problem]

[0015] In order to achieve the above object, the medical tool holder of the present invention includes a medical tool having a tool shaft, a holder body having a tool mounting hole formed therein for insertion of the medical tool, and tool holding means for holding the medical tool inserted into the holder body, wherein the tool holding means includes a tool holding and guiding member for holding the tool shaft and guiding its movement.

[0016] The tool holding and guide member may include a sliding contact holder whose outer circumferential surface is joined to the inner circumferential surface of the tool mounting hole and into which the tool shaft is inserted.

[0017] The medical tool holder according to the present invention can be configured to include a holder holding member coupled to the holder body.

[0018] The tool mounting hole may include a guide member mounting groove formed on its inner surface so that the tool holding and guide member can be seated therein, a holding member mounting groove formed in contact with the guide member mounting groove so that a holder binding member for mounting the holder holding member can be attached, and a tool mounting groove formed at one end of the tool mounting hole for mounting the medical tool.

[0019] The holder holding member may include a rod-shaped holder holding rod having one end connected to the holder body, a connecting plate formed on the other end of the holder holding rod, and an arm connecting member fastened to the connecting plate.

[0020] The retaining member mounting groove portion may include a bolt insertion hole having an insertion groove for the head of the bolt and an insertion groove for the threaded portion.

[0021] The holder binding member may include a bolt inserted into the bolt insertion hole, and a stop pin inserted between the holder holding rod and the holder main body.

[0022] Meanwhile, the tool mounting groove may include an elastic pressing portion that applies an elastic force to the medical tool inserted therein.

[0023] The medical tool holder according to the present invention may include an impact reduction device provided on the holder body to absorb and cushion impact forces applied to the holder body, and an impact reduction device insertion portion formed on the other end of the tool mounting hole for installation of the impact reduction device.

[0024] Preferably, the impact reduction device can be configured to include an impact reduction device main body having a tool insertion hole into which the tool shaft of the medical tool is inserted, an impact absorbing member arranged on the impact reduction device main body and absorbing the impact acting on the medical tool, and a detachment prevention member provided on the impact reduction device main body to prevent the shock absorbing member from detaching.

[0025] Meanwhile, the medical tool holder according to the present invention is characterized by including a tool binding means configured to restrain the medical tool inserted inside the tool mounting groove.

[0026] Preferably, the tool binding means can include a binding hole drilled in the holder body that communicates with the inside of the tool mounting groove portion, a tool binding member that is inserted through the binding hole, and a locking portion formed on the medical tool so that the tool binding member can be pulled in and locked.

[0027] The medical tool includes a straight impactor or a curved impactor that has the tool shaft and is used in hip joint surgery, and can include an impactor fixing member that is coupled to the tool mounting groove so as to movably hold the straight impactor or the curved impactor, into which the tool shaft is movably inserted and in which the locking portion is formed, and a stopper that limits movement of the tool shaft.

[0028] In this case, the stopper may be a stop pin formed on the tool shaft corresponding to a connection portion with the impactor fixing member.

[0029] The impactor fixing member may include a cylindrical body that is inserted onto the tool shaft and in which the locking portion is formed, and a movement slot that is drilled in the longitudinal direction of the cylindrical body and that limits movement of the stop pin.

[0030] The locking portion may include an inlet groove recessed into the inner end of the cylindrical body, and a locking groove extending in a curved manner from the inlet groove.

[0031] Meanwhile, the medical tool includes a straight reamer or curved reaming machine that is equipped with the tool shaft and used in hip joint surgery, and the straight reamer or curved reaming machine has a reaming machine frame with a hollow column structure that is inserted and attached to the outside of the tool shaft, and the reaming machine frame has the locking portion formed at the portion that is inserted into the tool mounting groove portion, and the locking portion can have an inlet groove recessed into the inner end of the reaming machine frame and a locking groove that extends in a curved manner into the inlet groove. [Effects of the Invention]

[0032] The medical tool holder according to the present invention has a simple and concise structure, with a hollow, columnar holder body provided with a tool holding means and a tool binding means. It has the advantage of being able to interchangeably mount various medical tools, such as impactors, drilling machines, and markers, for convenient use. The simple and concise structure is free from the risk of failure, ensuring operational stability and improving durability, while also enabling safe surgery.

[0033] Furthermore, when the medical tool holder according to the present invention is attached to the tool shaft of a medical tool that is subject to impact force, the impact absorbing member acts as a buffer while absorbing the impact force, thereby preventing deformation and damage to the medical tool and peripheral devices. [Brief explanation of the drawings]

[0034] [Figure 1] FIG. 1 is a perspective view showing a medical tool holder according to an embodiment of the present invention. [Figure 2] FIG. 1 is an exploded perspective view showing the main components of a medical tool holder according to an embodiment of the present invention. [Figure 3] FIG. 1 is a cross-sectional view showing a medical tool holder according to an embodiment of the present invention. [Figure 4a] FIG. 3 is a perspective view of part A in FIG. 2. [Figure 4b] FIG. 4 is an enlarged view of part A in FIG. 3. [Figure 4c] FIG. 4 is an enlarged view of part B in FIG. [Figure 4d] FIG. 4 is an enlarged view of part C in FIG. [Figure 5] FIG. 1 is a perspective view showing a holder body portion of a medical tool holder according to an embodiment of the present invention. [Figure 6] FIG. 1 is an exploded perspective view showing a holder body portion of a medical tool holder according to an embodiment of the present invention. [Figure 7a] 10A to 10C are views illustrating a process of mounting a medical tool on a medical tool holder according to an embodiment of the present invention. [Figure 7b] 10A and 10B are diagrams for explaining a state in which an impactor provided as a medical tool in a medical tool holder according to an embodiment of the present invention is used. [Figure 8a] FIG. 1 is an exploded perspective view illustrating an impact reduction device for a medical tool holder according to an embodiment of the present invention. [Figure 8b] FIG. 1 is a perspective view illustrating an internal structure of a shock reduction device for a medical tool holder according to an embodiment of the present invention. [Figure 8c] FIG. 1 is a side view illustrating an impact reduction device for a medical tool holder according to an embodiment of the present invention. [Figure 8d] 1 is an enlarged view of an elastic member for explaining an impact reduction device for a medical tool holder according to an embodiment of the present invention. [Figure 8e] 1 is an enlarged view of a separation prevention member for explaining an impact reduction device for a medical tool holder according to one embodiment of the present invention. [Figure 8f] FIG. 1 is a partially cutaway perspective view illustrating an impact reduction device for a medical tool holder according to an embodiment of the present invention. [Figure 8g] FIG. 10 is an enlarged view of a main part illustrating a state in which a hammer normally strikes a striking portion of an impactor, as a diagram for explaining an impact reduction device for a medical tool holder according to one embodiment of the present invention. [Figure 8h] FIG. 10 is an enlarged view of a main part illustrating a state in which the hammer has come off the impact portion of the impactor, as a diagram for explaining the impact reduction device for a medical tool holder according to one embodiment of the present invention. [Figure 9] FIG. 10 is a perspective view showing another application example of the medical tool holder according to the embodiment of the present invention. [Figure 10] FIG. 10 is a cross-sectional view showing another application example of the medical tool holder according to the embodiment of the present invention. [Figure 11] FIG. 10 is an enlarged exploded perspective view of a main part of another application example of the medical tool holder according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0035] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying FIGS. 1 to 11, and the same components in FIGS. 1 to 11 will be described with the same reference numerals.

[0036] However, detailed descriptions of the configurations and their functions and effects that can be easily understood by a person of ordinary skill in the art from the general techniques shown in the drawings will be simplified or omitted. Furthermore, because the present invention has the characteristics of a medical tool holder, the illustrations and descriptions will focus on the relevant parts, and descriptions of the remaining parts will be simplified or omitted. A medical tool holder according to one embodiment of the present invention can be used to grip various medical tools used in surgical operations, and the following description will be based on an example in which it is applied to a reaming machine and impactor used in hip replacement surgery.

[0037] Fig. 1 is a perspective view of a medical tool holder according to one embodiment of the present invention, Fig. 2 is an exploded perspective view of the main components of the medical tool holder according to one embodiment of the present invention, Fig. 3 is a cross-sectional view of the medical tool holder according to one embodiment of the present invention, Fig. 4a is a perspective view of part A in Fig. 2, Fig. 4b is an enlarged view of part A in Fig. 3, Fig. 4c is an enlarged view of part B in Fig. 3, Fig. 4d is an enlarged view of part C in Fig. 3, Fig. 5 is a perspective view of the holder main body of the medical tool holder according to one embodiment of the present invention, Fig. 6 is an exploded perspective view of the holder main body of the medical tool holder according to one embodiment of the present invention, Fig. 7a is a view illustrating the process of loading a medical tool into the medical tool holder according to one embodiment of the present invention, and Fig. 7b is a partially cutaway perspective view illustrating the use of an impactor provided as a medical tool in the medical tool holder according to one embodiment of the present invention.

[0038] Referring to Figures 1 to 7b, a medical tool holder according to one embodiment of the present invention comprises a medical tool t, a holder body 1, a tool holding means 2, a tool binding means 3, and a holder holding member 4. The medical tool holder has a simple and concise structure, and is characterized by its ability to be compatible with and used by various medical tools while satisfying operational stability and durability.

[0039] The medical tool t is not particularly limited as long as it is a medical tool having a tool shaft t11, but will be described based on an example including an impactor t1 and a reaming machine t2 (described later). In addition to the impactor and reaming machine, a marker device having a tool shaft can also be applied to the medical tool t. Note that a straight impactor handle having a linear external shape can be applied as the impactor t1, but in this embodiment, an example in which a curved impactor handle having a curved external shape is applied will be described based on the example.

[0040] The curved impactor is formed in an approximately rod-like shape and includes a linear tool shaft t11 ​​that is inserted into the holder body 1, a tool bending portion t12 that extends to one side of the tool shaft, and a cap-shaped impact portion that is provided at the other end of the tool shaft and to which the impact force of the hammer is applied during surgery.

[0041] The curved impactor is movably inserted into the tool shaft t11, is coupled to a tool mounting groove 15 of the holder main body 1 (described later), and is provided with an impactor fixing member 5 on which a locking portion 33 (described later) is formed. The curved impactor is provided with a stopper 6 that is attached to the tool shaft t11 ​​and limits the movement of the impactor fixing member 5, taking into consideration that the curved impactor moves back and forth during surgery.

[0042] As shown in FIG. 4a, the impactor fixing member 5 is inserted into the tool shaft t11 ​​and includes a cylindrical body 51 on which a locking portion 33 (described later) is formed, a retaining ring 52 protruding from the outside of the cylindrical body 51, and a pair of elongated movement holes 53 drilled in the longitudinal direction of the cylindrical body 51 and drilled in a substantially elliptical shape so as to restrict the movement of the stopper 6.

[0043] The stopper 6 is configured as a ring-shaped stop pin, and is provided so as to penetrate the outer diameter portion of the tool shaft t11, which corresponds to the connection portion with the impactor fixing member 5.

[0044] On the other hand, the holder body 1 is a component that functions as a housing for fixing the medical tool t, and has a structure in which a tool mounting hole 12 is formed longitudinally inside the hollow column body 11 for inserting the medical tool.

[0045] The hollow column 11 has a pipe-shaped holder body 111, an impact reduction device mounting portion 112 in which an impact reduction device insertion portion 17 having an inner diameter large enough to forcefully fit the outer diameter portion of the impact reduction device 8 into the front portion of the holder body, and a reducing portion 113 having a reduced inner diameter so that the impact reduction device 8 is not pushed backward even when an external force is applied to it.

[0046] The tool mounting hole 12 is formed with a guide member mounting groove 13 formed on its inner surface so that a tool holding and guide member 21 can be seated therein, a holding member mounting groove 14 formed in contact with the guide member mounting groove 13 so that a holder binding member 16 for mounting the holder holding member 4 can be provided, and a tool mounting groove 15 formed at one end of the tool mounting hole 12 for inserting a medical tool.

[0047] The retaining member mounting groove portion 14 is composed of a bolt insertion hole 141 having an insertion groove for the bolt head and an insertion groove for the threaded portion for inserting the bolt 161 described later, and a pin insertion hole 142 that is recessed in contact with the bolt insertion hole.

[0048] The holder binding member 16 is composed of a bolt 161 inserted into the bolt insertion hole 141 and a stop pin 162 inserted between the holder holding rod 41 and the holder main body 1 .

[0049] The holder body 1 has a bolt retraction hole 19 drilled downward so as to be coaxial with the bolt insertion hole 141, into which the bolt 161 can be inserted when tightening the bolt, and a rod seating groove 18 in which the lower end of the holder holding rod 41 seats is recessed.

[0050] On the other hand, the tool holding means 2 is provided with a tool holding and guiding member 21, as a component for holding a medical tool inserted into the holder body 1, which holds the tool shaft t11 ​​and guides its movement.

[0051] The tool holding and guide member 21 is composed of a sliding retainer whose outer peripheral surface is joined to the inner peripheral surface of a guide member mounting groove portion 13 provided in the tool mounting hole 12, and into whose inner peripheral surface the tool shaft t11 ​​is inserted. The sliding retainer can be composed of a bearing, but in this embodiment, a plurality of sliding bushes, known as ordinary oil-less bushes or the like, are provided.

[0052] On the other hand, the holder holding member 4 is a component that is coupled to the holder main body 1 on one side so as to perform the function of holding the holder main body 1, and is provided on the other side to the arm of a medical robot or the like.

[0053] The holder holding member 4 comprises a rod-shaped holder holding rod 41 having one end connected to the holder main body 1, a connecting plate 42 formed on the other end of the holder holding rod 41, and an arm connecting member 43 fastened to the connecting plate 42.

[0054] The holder holding rod 41 is a rod-shaped member formed at an angle, and is connected by the aforementioned bolt 161 and stop pin 162 with its lower end seated in the rod seating groove 18 of the holder main body 1, and a bolt fastening hole 412 and a pin insertion hole 413 are formed at positions corresponding to the aforementioned bolt insertion hole 141 and pin insertion hole 142.

[0055] The connecting plate 42 can be formed integrally with the holder holding rod, and has a bolt fastening hole 422 and a pin insertion hole 423 formed therein so as to be fastened by a bolt 44 and a locking pin 45, and is assembled by fastening and inserting the bolt 44 and the locking pin 45 into the corresponding bolt fastening hole 414 and the pin insertion hole 415 formed on the top of the holder holding rod 41.

[0056] The arm connection member 43 is composed of a clamp member that is fastened to a robot side clamp member (not shown) attached to the opposing robot arm (not shown), and the clamp member has a disk-shaped clamp body 431 with multiple fastening holes formed therein, and a clamp protrusion 432 with a locking hole 433 formed therein that is inserted into or connected to the clamp shaft of the robot side clamp member (not shown).

[0057] On the other hand, the tool binding means 3 can be configured without any particular restrictions as long as it is a component for restraining the medical tool t inserted inside the tool mounting groove portion 15 and is capable of binding and releasing the medical tool, but the structure of this embodiment is simple and concise, yet is characterized by being configured to allow a variety of medical tools to be attached and detached interchangeably.

[0058] The tool binding means 3 includes a plurality of binding holes 31 drilled around the holder body 1 so as to communicate with the inside of the tool mounting groove portion 15, as shown in Figure 4a, a tool binding member 32 inserted through the binding holes 31, and a locking portion 33 formed on the medical tool t so that the tool binding member 32 can be pulled in and locked.

[0059] The tool bundling member 32 is composed of a threaded portion 321 that is fastened to the bundling hole 31 , and a locking protrusion 322 that is formed at the end of the threaded portion 321 and inserted into the locking portion 33 .

[0060] The locking portion 33 is formed in the impactor fixing member 5 and includes an inlet groove 331 recessed into the inner end of the cylindrical body 51, and a locking groove 332 that extends into this inlet groove and curves in a generally V-shaped cross section.

[0061] The process of attaching the medical tool t using the above-mentioned tool binding means 3 will be briefly explained with reference to Figures 7a and 7b. As shown in part (a) of Figure 7a, the locking protrusion 322 of the tool binding member 32 is aligned to match the inlet groove 331. As shown in part (b) of Figure 7a, the medical tool t1 is pressed into the inside of the inlet groove 331, and then, as shown in part (c) of Figure 7a, the medical tool t1 is rotated along the locking groove 332 at an angle of approximately 30°. The elastic force of the elastic pressing portion causes the medical tool t1 to be pulled into the concave end 333 of the locking groove 332, so that the medical tool t1 is stably fixed and does not come off.

[0062] On the other hand, the tool attachment groove portion 15 is provided with an elastic pressing portion 7 that applies an elastic force to stably bind the medical tool inserted therein.

[0063] The elastic pressing portion 7 includes a compression coil spring 71 that provides elastic force to the medical tool t portion that has flowed into the tool mounting groove portion 15, and a pressing ring 72 that compresses the medical tool by the elastic force applied from this compression coil spring 71.

[0064] The accompanying drawings, Figures 8a to 8g, are diagrams for explaining an impact reduction device for a medical tool holder according to one embodiment of the present invention, where Figure 8a is an exploded perspective view, Figure 8b is a see-through view for explaining the internal structure, Figure 8c is a side view, Figure 8d is an enlarged view of an elastic member, Figure 8e is an enlarged view of a separation prevention member, and Figure 8f is a partially cutaway perspective view. Figures 8g and 8h are diagrams for explaining how the impact reduction device is used, where Figure 8g is an enlarged view of a main part for explaining a state in which the hammer has normally struck the striking part of the impactor, and Figure 8h is an enlarged view of a main part for explaining a state in which the hammer has missed the striking part of the impactor.

[0065] 8a to 8h, a medical tool holder according to one embodiment of the present invention has an impact reduction device insertion section 17 formed at the other end of the holder body 1 and the tool mounting hole 12, and an impact reduction device 8 provided on the holder body 1 is configured in this impact reduction device insertion section 17 to absorb and cushion the impact force applied to the holder body 1.

[0066] The impact reduction device 8 comprises an impact reduction device main body 81, an impact absorbing member 82, a separation prevention member 83, and an airtight member 84, and even if an abnormal impact force is applied to the medical tool, it absorbs and cushions the force, thereby preventing damage to the holder main body 1, the medical tool t, etc., and preventing adverse effects on the surgery.

[0067] The impact reduction device main body 81 is a part that functions as the basic skeleton, and is a component provided in the holder main body 1 into which a medical tool such as an infector t1 is inserted, and has a tool insertion hole 812 into which the tool shaft t11 ​​of the medical tool is inserted.

[0068] The impact reduction device main body 81 is formed in a substantially cylindrical shape, and has a tool insertion hole 812 formed therein so that a tool shaft t11 ​​of a medical tool such as the impactor t1 can be inserted therein.

[0069] The tool insertion hole 812 has a shape that corresponds to the insertion of a first separation prevention protrusion 8312 and a second separation prevention protrusion 8322, which will be described later, and is formed with an inner diameter that is larger than the diameters of the first separation prevention protrusion 8312 and the second separation prevention protrusion 8322 so that a gap d for inserting the airtight member 84 and the elastic member 821 is provided between the first separation prevention protrusion 8312 and the second separation prevention protrusion 8322. For example, the tool insertion hole 812 is formed as a substantially triangular prism-shaped hole having three flat hole plane portions 8121 and three curved apexes 8122 connecting the hole plane portions 8121 so that three leaf springs can be inserted.

[0070] The impact reduction device main body 81 has fastening holes 815 for fastening fastening screws 89 formed on the front and rear surfaces in contact with the tool insertion holes 812 .

[0071] On the other hand, the impact absorbing member 82 is arranged in the impact reduction device main body 81 and is a component that absorbs the impact acting on the medical tool, and is composed of an elastic member 821 that is built into the impact reduction device main body 81 so as to absorb the impact applied to the tool shaft t11.

[0072] The elastic member 821 can be formed in various shapes and structures without particular limitations as long as it can absorb and cushion the diagonal impact force transmitted from the tool shaft t11. However, in this embodiment, taking into consideration that the tool shaft t11 ​​is a round bar-shaped shaft, the elastic member 821 is mainly characterized in that it is composed of multiple leaf springs formed in a convex shape so as to come into contact with the outer surface of the tool shaft and absorb the impact force.

[0073] Preferably, the leaf spring has a structure including locking portions 8211 formed on both ends and a protrusion 8212 that protrudes toward the center of the tool insertion hole 812 between the locking portions 8211, and can be formed by processing a rectangular plate material using a bending method. The leaf spring can be made from any elastic material without any particular restrictions, but in this embodiment, it is made from a stainless steel metal sheet that is excellent in hygiene and durability.

[0074] On the other hand, the anti-detachment member 83 is a component provided on the impact reduction device main body 81 to prevent the shock absorbing member 82 from detaching, and is composed of a first anti-detachment flange 831 and a second anti-detachment flange 832 connected to one end and the other end, which are both ends of the impact reduction device main body 81.

[0075] The first anti-detachment flange 831 is attached to one end of the impact reduction device main body 82 and includes a first binding portion 8311 having a through hole 8313 communicating with the tool insertion hole 812, and a first anti-detachment protrusion 8312 that protrudes from the inner surface of the first binding portion 8311 and holds one end of the leaf spring so that it does not detach.

[0076] The first binding portion 8311 has a through hole 8313 formed in the center of the roughly disk-shaped main body, and a plurality of fastening holes 8314 for fastening to the impact reduction device main body 81 are drilled at equal angles.

[0077] The second anti-detachment flange 832 is attached to the other end of the impact reduction device main body 81 and comprises a second binding portion 8321 having an approximately circular plate-shaped main body with a through hole 8323 formed therein that communicates with the tool insertion hole 812, and a second anti-detachment protrusion 8322 that protrudes from the inner surface of the second binding portion 8321 and holds the other end of the leaf spring so that it does not detach.

[0078] Similar to the first binding part 8311, the second binding part 8321 has a structure in which a through hole and a plurality of fastening holes 8323 are formed in a disk-shaped main body.

[0079] The first anti-detachment protrusion 8312 and the second anti-detachment protrusion 8322 protrude along the peripheral edges of the through holes 8313, 8323 so that a gap d is provided into which the engaging portion 8211 is inserted and received when the first anti-detachment flange 831 and the second anti-detachment flange 832 are fastened to the impact reduction device main body 81.

[0080] In particular, the first and second separation prevention protrusions 8312 and 8322 are characterized in that they are formed with guide flat portions 8315 and 8325 having a planar structure so as to guide the movement of the locking portion when the leaf spring contracts and expands.

[0081] The airtight member 84 is a component for maintaining airtightness at the connection portion between the separation prevention member 83 and the impact reduction device main body 81, and is usually an airtight ring called an O-ring.

[0082] Hereinafter, other application examples of the medical tool holder according to one embodiment of the present invention will be described. Specific descriptions of components similar to those shown in the above-described embodiment will be omitted, and the description will focus on components that have differences.

[0083] FIG. 9 is a perspective view showing another application example of a medical tool holder according to an embodiment of the present invention, with the medical tool portion shown separated; FIG. 10 is a cross-sectional view showing another application example of a medical tool holder according to an embodiment of the present invention; and FIG. 11 is an exploded perspective view showing an enlarged view of a main portion of the other application example of a medical tool holder according to an embodiment of the present invention.

[0084] 9 to 11, a medical tool holder according to another application example of the present invention, similar to that described above, comprises a medical tool t, a holder body 1, a tool holding means 2, a tool bundling means 3, a holder holding member 4, and an elastic pressing portion 7, and the medical tool t is configured as a reinforcing machine t2 instead of the impactor t1 described above.

[0085] The reamer t2 (reamer) may be a straight reamer having a linear external shape, but in this application example, a curved offset reamer, also known as an offset reamer, having a curved external shape will be described as an example.

[0086] The curved reinforcing machine t2 is provided with a tool shaft t21 having a roughly rod-like shape and a linear structure that is inserted into the holder body 1, a reinforcing machine frame t22 having a hollow columnar structure that is inserted into and attached to the outside of the tool shaft, a universal joint t23 having one end connected to the rear end of the tool shaft t21, an offset shaft t24 having the other end connected to the universal joint t24, a cup lock member t25 having one end connected to the offset shaft, and a reamer basket cup t29 (reamer basket-cuo) that is connected to the other end of the cup lock member t25 and performs the cutting action.

[0087] The curved reinforcing machine t2 is equipped with an offset frame t26 that is stacked on the outside of the universal joint, offset shaft, and cup lock member, while its rotational movement is guided by a first shaft retaining bearing t27 that is provided between the outer surface of the end of the tool shaft t21 and the inner surface 2 of the tip of the reinforcing machine frame t22, and a second shaft retaining bearing t28 that is provided between the outer surface of the tip of the offset frame t26.

[0088] The tool binding means 3 includes a plurality of binding holes 31 drilled around the holder body 1 so as to communicate with the inside of the tool mounting groove portion 15, a tool binding member 32 inserted through the binding holes 31, and a locking portion 33 formed on the medical tool so that the tool binding member 32 is pulled in and locked, and the locking portion 33 is formed on the drilling machine frame t22.

[0089] The locking portion 33 is formed at the tip portion of the reinforcing machine frame t22 that is inserted into the tool mounting groove portion 15, and is equipped with an inlet groove 331 that is recessed into the inner end portion of the reinforcing machine frame t22, and a locking groove 332 that extends in a curved manner into this inlet groove.

[0090] As shown in Figures 10 to 12, a medical tool holder according to another application example of the present invention is configured with a structure in which the impactor fixing member 5 and stopper 6 described above are omitted because they are not required, as the medical tool t is configured as a drilling machine that does not require forward and backward movement but only rotational movement.

[0091] Since the reamer is not subjected to impact forces during the surgical procedure, an impact reduction device 8 is not necessarily required. However, since the reamer can absorb unexpected impact forces applied from the outside and elastically holds the tool shaft t21 in front of the holder body 1, it is desirable to provide an impact reduction device 8 on the holder body 1.

[0092] The operation of the medical tool holder according to one embodiment of the present invention will be briefly described below.

[0093] The procedure for performing an artificial hip joint surgery using the medical tool holder according to the present invention is generally as follows: first, the acetabulum of the hip joint is pre-processed, such as by cutting it using a reamer; then, an artificial acetabulum cup is inserted; then, an impactor is used to press and fix the cup; and then an artificial femoral head is connected.

[0094] For this purpose, first, the holder holding member 4 of the holder main body 1 is assembled to the arm (not shown) of the artificial joint surgery robot, and a curved reaming tool t2 is attached as a medical tool.

[0095] Referring to Figure 11, the curved reinforcing tool t2 is assembled by inserting the tool shaft t21 into the tool mounting hole 12 and fastening it using the tool fastening means 3. However, similar to the fastening method of the impactor t1 shown in Figure 7a above, the curved reinforcing tool t2 also aligns the locking protrusion 322 of the tool fastening member 32 so that it coincides with the inlet groove 331. The medical tool t2 is then pressed into place and inserted into the inside of the inlet groove 331. When the medical tool t2 is then rotated counterclockwise along the locking groove 332 at an angle of approximately 30°, the elastic force of the elastic pressing portion 7 causes it to be pulled into the recessed end 333 of the locking groove 332, and the medical tool t1 is stably fixed so that it does not come off.

[0096] When the assembly of the curved-type reinforcing machine t2 is completed in this manner, the front portion of the tool shaft t21 is rotatably and elastically held by the impact absorbing member 82 of the impact reduction device 8, the approximate central portion of the tool shaft t21 is rotatably held by the tool holding and guide member 21, and the end portion of the tool shaft t21 is rotatably held by the first shaft holding bearing t27 and the second shaft holding bearing t28. Therefore, when the rotational force of the drive motor (not shown) or the rotational force due to manual operation is transmitted, the tool shaft t21 rotates smoothly.

[0097] The rotational force transmitted to the tool shaft t21 in this manner is transmitted to the offset shaft t24 and the cup lock member t25 via the universal joint t23, causing the reamer basket cup t29 to cut the acetabulum of the hip joint while rotating.

[0098] After the pre-processing such as cutting is completed, the curved reaming tool t2 is separated in the reverse order to the assembly operation. That is, the curved reaming tool t2 is pushed inward to release the locking projection 322 from the recessed end 333, and then rotated clockwise at an angle of about 30° along the locking groove 332, whereby the locking projection 322 is separated while moving outward along the inlet groove due to the elastic force of the elastic pressing part.

[0099] Meanwhile, as described above, once the curved reaming tool t2 is separated, an infector t1 such as a curved infector is assembled to the holder body 1, the artificial acetabular cup (c, acetabulum-cup) is pressed in and fixed, and the artificial femoral head is connected to complete the surgery.

[0100] The infector t1 is assembled by inserting the tool shaft t11 ​​into the tool mounting hole 12 and fastening it using the tool fastening means 3. As shown in part (a) of Figure 7a, the locking protrusion 322 of the tool fastening member 32 is aligned to match the inlet groove 331. As shown in part (b) of Figure 7a, the medical tool t1 is pressed into the inside of the inlet groove 331, and then, as shown in part (c) of Figure 7a, it is rotated along the locking groove 332 at an angle of approximately 30°. The elastic force of the elastic pressing portion causes the medical tool t1 to be pulled into the recessed end 333 of the locking groove 332, so that the medical tool t1 is stably fixed and does not come off.

[0101] When the impactor t1 is assembled in this manner, the front portion of the tool shaft t11 ​​is movably and elastically held by the impact absorbing member 82 of the impact reduction device 8, and the rear portion of the tool shaft t21 is movably held by the tool holding and guide member 11.

[0102] Meanwhile, when the assembly of the impactor t1 is completed as shown in FIG. 1, the impactor t1 is struck using a hammer (not shown). As a result, the tool shaft t1 moves forward (d) as shown in FIG. 7b, and the artificial acetabular cup can be pressed into the acetabulum of the hip joint.

[0103] The impact surgery process using the impactor t1 is performed by the user applying impact force to the impacting part t13 using a hammer, as shown in Figure 8g. If the impact direction of the hammer is coaxial with the axial direction, which is the longitudinal direction of the impactor, stable surgery is performed. However, if the impact direction of the hammer is misaligned with the axial direction of the impactor and the impact force is applied to the impactor in an oblique direction (off-axis), as shown in Figure 8h, deformation, damage, and breakage of the holder body 1 and impactor t1 may occur. However, since the impact reduction device 8 is installed in the holder body 1, it can absorb impact and prevent the above problems from occurring.

[0104] 8h, when the hammer is released, a diagonal displacement force is generated in the tool shaft t11 ​​because the tool shaft t1 is inserted into the tool insertion hole 812. At the same time, the outer circumferential surface of the tool shaft exerts a displacement force on the elastic member 821, and the convex portion 8212 contracts to absorb and buffer the impact force.

[0105] As used above, terms such as "comprise," "comprise," or "have," unless otherwise specified, mean that the relevant element may be present and should be interpreted as including other elements rather than excluding other elements. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Commonly used terms, such as dictionary-defined terms, should be interpreted in accordance with the contextual meaning of the relevant art and should not be interpreted in an idealized or overly formal sense unless expressly defined in the present invention.

[0106] The configuration and operation of the medical tool holder according to one embodiment of the present invention have been described above, but this is merely an example, and a person skilled in the art will understand that parts of the above-described embodiment can be replaced or modified without departing from the technical spirit of the present invention.

[0107] Therefore, it should be understood that the scope of protection of the present invention covers the inventions described in the claims and their equivalents. [Industrial Applicability]

[0108] The present invention relates to a medical tool holder that is simple and concise in structure, satisfies operational stability and durability, and can be used interchangeably. It can be applied as a medical tool holder to which impactors, drilling machines, etc. used in surgical operations are attached, but it can also be applied to holders for various medical tools other than those used in surgical operations.

Claims

1. a medical tool having a tool shaft; a holder body having a tool mounting hole formed therein for inserting the medical tool; a tool holding means for holding the medical tool inserted into the holder body, A medical tool holder, wherein the tool holding means includes a tool holding and guiding member that holds the tool shaft while guiding its movement.

2. 2. The medical tool holder according to claim 1, wherein the tool holding and guide member includes a sliding retainer whose outer circumferential surface is joined to the inner circumferential surface of the tool mounting hole and into which the tool shaft is inserted.

3. The medical tool holder of claim 1 , further comprising a holder retaining member coupled to the holder body.

4. The tool mounting hole is a guide member mounting groove formed on an inner circumferential surface thereof so that the tool holding and guide member can be seated therein; a holding member mounting groove formed in contact with the guide member mounting groove so that a holder bundling member for mounting the holder holding member can be mounted; 4. The medical tool holder according to claim 3, further comprising: a tool mounting groove formed at one end of the tool mounting hole for mounting the medical tool.

5. the holder holding member includes a rod-shaped holder holding rod having one end connected to the holder body, a connecting plate formed at the other end of the holder holding rod, and an arm connecting member fastened to the connecting plate; the retaining member mounting groove portion is provided with a bolt insertion hole having an insertion groove for a bolt head and an insertion groove for a threaded portion, 5. The medical tool holder according to claim 4, wherein the holder binding member includes a bolt inserted into the bolt insertion hole and a locking pin inserted between the holder holding rod and the holder body.

6. 5. The medical tool holder according to claim 4, wherein the tool mounting groove includes an elastic pressing portion that applies an elastic force to the medical tool inserted therein.

7. an impact reduction device provided on the holder body to absorb and cushion an impact force applied to the holder body; 5. The medical tool holder according to claim 4, further comprising a shock-reducing device inserting portion formed at the other end of the tool mounting hole for installing the shock-reducing device.

8. The impact reduction device is an impact reduction device body having a tool insertion hole formed therein into which a tool shaft of the medical tool is inserted; a shock absorbing member disposed on the shock reduction device body and configured to absorb a shock acting on the medical tool; 8. The medical tool holder according to claim 7, further comprising: a separation prevention member provided on the shock reduction device body to prevent separation of the shock absorbing member.

9. 9. The medical tool holder of claim 4, further comprising a tool securing means configured to restrain the medical tool inserted within the tool attachment groove.

10. The tool binding means is a binding hole formed in the holder body and communicating with the interior of the tool mounting groove; a tool bundling member inserted through the bundling hole; 10. The medical tool holder according to claim 9, further comprising: a locking portion formed on the medical tool so that the tool binding member can be pulled in and locked.

11. the medical tool includes a straight or curved impactor used in hip joint surgery, the medical tool having the tool shaft; 11. The medical tool holder according to claim 10, further comprising: an impactor fixing member coupled to the tool mounting groove so as to movably hold the straight impactor or the curved impactor, into which the tool shaft is movably inserted and in which the locking portion is formed; and a stopper that limits movement of the tool shaft.

12. the stopper is constituted by a stop pin formed on the tool shaft corresponding to a connection portion with the impactor fixing member, the impactor fixing member includes a cylindrical body that is inserted onto the tool shaft and in which the locking portion is formed, and a movement elongated hole that is drilled in the longitudinal direction of the cylindrical body and that limits movement of the stop pin, 12. The medical tool holder according to claim 11, wherein the locking portion includes an inlet groove recessed into the inner end of the cylindrical body, and a locking groove extending in a curved manner from the inlet groove.

13. the medical tool includes a straight reamer or a curved reaming tool used in hip joint surgery, the tool shaft being included; The straight reamer or curved reaming machine includes a reaming machine frame having a hollow column structure that is inserted into and attached to the outside of the tool shaft, 11. The medical tool holder according to claim 10, wherein the locking portion is formed in the reaming machine frame at a portion that is inserted into the tool mounting groove portion, and the locking portion includes an inlet groove that is recessed into an inner end portion of the reaming machine frame, and a locking groove that extends in a curved manner from the inlet groove.

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