Impact reduction device for medical tools and medical holder equipped with the same

Abstract

The present invention relates to an impact reduction device for medical tools and a medical holder equipped with the same, and more particularly to an impact reduction device for medical tools that can absorb and cushion abnormal impact forces applied by medical tools, thereby preventing deformation and damage to the medical holder, medical tool, and peripheral devices, and a medical holder equipped with the same. The impact reduction device for a medical tool according to the present invention is characterized in that it comprises 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 disposed 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 impact absorbing member from detaching.

Description

[Technical Field]

[0001] The present invention relates to an impact reduction device for medical tools and a medical holder equipped with the same, and more particularly to an impact reduction device for medical tools that can absorb and cushion abnormal impact forces applied to medical tools, thereby preventing deformation and damage to the medical holder, medical tool, and peripheral devices, and a medical holder equipped with the same. [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 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 according to information input into a computer, and 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] A typical hip replacement surgery involves preparing the acetabulum of the hip joint using a reamer, inserting an artificial acetabulum cup, and then using an impactor to press it in and fix it, before connecting the artificial femoral head.

[0006] Impactors used in the above-mentioned hip replacement surgery include straight impactor handles, which have a linear external shape, and curved impactor handles, which have a curved external shape.

[0007] For example, a straight impactor is composed of an impactor shaft formed in a generally rod shape and a cap or disk-shaped impact portion formed at the rear end of the impactor shaft.

[0008] When the impactor is used, the impactor shaft is inserted into the holder and held, and the impact portion at the rear end is struck strongly with a hammer to press-fit the artificial acetabular cup.

[0009] As mentioned above, when medical staff perform treatment by striking the impactor, 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 a diagonal direction (offset), there is a problem that this can cause breakage or damage to the holder and impactor.

[0010] Furthermore, if the hammer comes off, the diagonal impact force will also be applied to the artificial acetabular cup, which will have a negative impact on the surgery. In addition, the impact force of the hammer will 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]

[0011] [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] Korean Patent No. 10-2254406 "Impactor for medical treatment" [Patent Document 3] Korean Patent No. 10-0822471 "Tibial Impactor" Summary of the Invention [Problem to be solved by the invention]

[0012] The present invention has been proposed with the above in mind, and its object is to provide an impact reduction device for a medical tool that can absorb and cushion abnormal impact forces applied to a medical tool, and a medical holder equipped with the same. [Means for solving the problem]

[0013] In order to achieve the above object, the impact reduction device for a medical tool according to the present invention is characterized in that it includes 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 disposed 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 impact absorbing member from detaching.

[0014] The shock absorbing member may include an elastic member built into the shock reducing device body so as to absorb the shock applied to the tool shaft.

[0015] Meanwhile, the elastic member may be composed of a plurality of leaf springs formed in a convex shape so as to come into contact with the outer surface of the tool shaft and absorb impact forces.

[0016] The anti-detachment member may include a first binding portion that is fastened to one end of the impact reduction device main body and has a through hole formed therein that communicates with the tool insertion hole; a first anti-detachment flange that protrudes from the inner surface of the first binding portion and has a first anti-detachment protrusion that holds one end of the leaf spring so as to prevent it from detaching; a second binding portion that is fastened to the other end of the impact reduction device main body and has a through hole formed therein that communicates with the tool insertion hole; and a second anti-detachment flange that protrudes from the inner surface of the second binding portion and has a second anti-detachment protrusion that holds the other end of the leaf spring so as to prevent it from detaching.

[0017] Preferably, the leaf spring can be formed to have a structure having locking portions formed on both ends and a convex portion that protrudes convexly toward the center of the tool insertion hole between the locking portions.

[0018] The first binding portion and the second binding portion may be formed in a disk shape with fastening holes drilled therein for fastening to the impact reduction device body.

[0019] The first anti-detachment protrusion and the second anti-detachment protrusion can protrude along the periphery of the through hole so that a gap is provided into which the engaging portion can be inserted and received when the first anti-detachment flange and the second anti-detachment flange are fastened to the impact reduction device main body.

[0020] Preferably, the tool insertion hole of the impact reduction device body has a corresponding shape so that the first anti-detachment protrusion and the second anti-detachment protrusion can be inserted, and can be formed so that an airtight member can be inserted into the gap.

[0021] The first and second anti-detachment protrusions may have guide planes formed thereon to guide the movement of the locking portion when the leaf spring contracts and expands.

[0022] The medical holder equipped with an impact reduction device for a medical tool according to the present invention is a medical holder to which a medical tool is attached, characterized in that the impact reduction device for a medical tool described above is provided on the medical holder. [Effects of the Invention]

[0023] According to the impact reduction device for medical tools and the medical holder equipped with the same of the present invention, when they are installed on the tool shaft of a medical tool that is subjected to impact forces, the impact absorbing member absorbs the impact forces and performs a cushioning function, thereby preventing deformation and damage to the medical tool and peripheral devices.

[0024] In particular, when the impact reduction device for a medical tool according to the present invention is applied to hip joint surgery in which an impact is applied to press-fit an implant into the hip joint, even if the hammer is released and a diagonal displacement is induced in the tool shaft, the convex portion of the elastic member absorbs the impact force and provides a cushioning effect, thereby preventing deformation and damage to the holder and impactor. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a perspective view showing an impact reduction device for a medical tool according to an embodiment of the present invention; [Figure 2] 1 is an exploded perspective view showing an impact reduction device for a medical tool according to an embodiment of the present invention; [Figure 3] 1 is a perspective view illustrating the internal structure of a shock reduction device for a medical tool according to an embodiment of the present invention. [Figure 4] 1 is a side view showing an impact reduction device for a medical tool according to an embodiment of the present invention. [Figure 5a] 1 is an enlarged perspective view of a main part of an impact reduction device for a medical tool according to a first embodiment of the present invention, showing an enlarged elastic member. [Figure 5b] 1 is an enlarged perspective view of a main part of an impact reduction device for a medical tool according to a first embodiment of the present invention, showing an enlarged separation prevention member. [Figure 6]1 is a partially cutaway perspective view of a shock reduction device for a medical tool according to a first embodiment of the present invention; [Figure 7a] FIG. 1 is a diagram for explaining the operation of the impact reduction device for a medical tool according to the first embodiment of the present invention, and is a perspective view showing a state in which the impact reduction device c and the impactor i are provided on a medical holder h. [Figure 7b] FIG. 1 is a diagram for explaining the operation of the impact reduction device for a medical tool according to the first embodiment of the present invention, and is an enlarged view of a main part for explaining the state in which the hammer normally strikes the striking portion of the impactor. [Figure 7c] FIG. 2 is a diagram for explaining the operation of the impact reduction device for a medical tool according to the first embodiment of the present invention, and is an enlarged view of a main part for explaining a state in which the hammer has come off the impact portion of the impactor. DETAILED DESCRIPTION OF THE INVENTION

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying FIGS. 1 to 7c, in which the same components are designated by the same reference numerals.

[0027] In the drawings, detailed descriptions of the configurations, their functions, and effects that can be easily understood by a person having ordinary skill in the art will be simplified or omitted. Also, since the present invention is characterized by a shock reduction device for a medical tool, the drawings and descriptions will focus on the relevant parts, and descriptions of the remaining parts will be simplified or omitted.

[0028] Fig. 1 is a perspective view showing an impact reduction device for a medical tool according to one embodiment of the present invention, Fig. 2 is an exploded perspective view showing an impact reduction device for a medical tool according to one embodiment of the present invention, Fig. 3 is a transparent view for explaining the internal structure of the impact reduction device for a medical tool according to one embodiment of the present invention, Fig. 4 is a side view showing an impact reduction device for a medical tool according to one embodiment of the present invention, Fig. 5a and Fig. 5b are enlarged perspective views of a main part of an impact reduction device for a medical tool according to a first embodiment of the present invention, Fig. 5a is an enlarged view of the elastic member, and Fig. 5b is an enlarged view of the separation prevention member. Fig. 6 is a partially cutaway perspective view of an impact reduction device for a medical tool according to the first embodiment of the present invention.

[0029] Referring to Figures 1 to 6, an impact reduction device c for a medical tool according to one embodiment of the present invention is designed to absorb and cushion abnormal impact forces even when they are applied to a medical tool, thereby preventing damage to the medical holder, medical tool, etc. and preventing adverse effects on the surgery, and comprises an impact reduction device main body 1, an impact absorbing member 2, a separation prevention member 3, and an airtight member 4.

[0030] The impact reduction device main body 1 is the part that performs the function of the basic skeleton, and is a component provided in a holder h, which is the part that holds a medical tool such as an impactor i when in use, and has a tool insertion hole 12 into which the tool shaft i1 of the medical tool is inserted.

[0031] The impact reduction device main body 1 is formed in a substantially cylindrical shape, and has a tool insertion hole 12 formed therein so that a tool shaft i1 of a medical tool such as an impactor i can be inserted therein.

[0032] The tool insertion hole 12 has a shape that corresponds to the insertion of a first separation prevention protrusion 312 and a second separation prevention protrusion 322, which will be described later, and is formed in a form in which the inner diameter dimension is larger than the diameters of the first separation prevention protrusion 312 and the second separation prevention protrusion 322 so that a gap t is provided between the first separation prevention protrusion 312 and the second separation prevention protrusion 322 for inserting the airtight member 4 and the elastic member 21. For example, the tool insertion hole 12 is formed as a substantially triangular prism-shaped hole having three flat hole plane portions 121 and three curved apexes 122 connecting the hole plane portions 121 so that three leaf springs can be inserted.

[0033] The impact reduction device main body 1 has fastening holes 15 for fastening the fastening screws 9 formed on the front and rear surfaces that contact the tool insertion holes 12 .

[0034] On the other hand, the shock absorbing member 2 is a component that is placed in the shock reduction device main body 1 and absorbs the shock acting on the medical tool, and is composed of an elastic member 21 that is built into the shock reduction device main body 1 so as to absorb the shock applied to the tool shaft i1.

[0035] The elastic member 21 can be formed into various shapes and structures without any particular restrictions as long as it can absorb and cushion the diagonal impact force transmitted from the tool shaft i1. However, in this embodiment, taking into consideration that the tool shaft i1 is a round bar-shaped shaft, the main feature is 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.

[0036] Preferably, the leaf spring has a structure including locking portions 211 formed on both ends and a protrusion 212 that protrudes toward the center of the tool insertion hole 12 between the locking portions 211, and can be formed by bending a rectangular plate material. 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, which is highly hygienic and durable.

[0037] On the other hand, the anti-detachment member 3 is a component provided in the impact reduction device main body 1 to prevent the shock absorbing member 2 from detaching, and is composed of a first anti-detachment flange 31 and a second anti-detachment flange 32 connected to one end and the other end, which are both ends of the impact reduction device main body 1.

[0038] The first anti-detachment flange 31 is attached to one end of the impact reduction device main body 2 and includes a first binding portion 311 having a through hole 313 communicating with the tool insertion hole 12, and a first anti-detachment protrusion 312 that protrudes from the inner surface of the first binding portion 311 and holds one end of the leaf spring so that it does not detach.

[0039] The first binding portion 311 has a through hole 313 formed in the center of the roughly disk-shaped main body, and a plurality of fastening holes 314 for fastening to the impact reduction device main body 1 are drilled at equal angles.

[0040] The second anti-detachment flange 32 is attached to the other end of the impact reduction device main body 1 and includes a second binding portion 321 having an approximately circular plate-shaped main body with a through hole 323 communicating with the tool insertion hole 12, and a second anti-detachment protrusion 322 that protrudes from the inner surface of the second binding portion 321 and holds the other end of the leaf spring so that it does not detach.

[0041] Similar to first binding part 311, second binding part 321 has a structure in which a through hole and a plurality of fastening holes 323 are formed in a disk-shaped main body.

[0042] The first anti-detachment protrusion 312 and the second anti-detachment protrusion 322 protrude along the peripheral edges of the through holes 313, 323 so that a gap t is provided into which the engaging portion 211 can be inserted and received when the first anti-detachment flange 31 and the second anti-detachment flange 32 are fastened to the impact reduction device main body 1.

[0043] In particular, the first and second separation prevention protrusions 312, 322 are characterized in that they are formed with guide flat portions 315, 325 having a planar structure so as to guide the movement of the locking portion when the leaf spring contracts and expands.

[0044] The airtight member 4 is a component for maintaining airtightness at the connection portion between the separation prevention member 3 and the impact reduction device main body 1, and is provided with an airtight ring commonly known as an O-ring.

[0045] 7a indicates a curved impactor handle attached to a medical holder h, and this curved impactor handle is generally rod-shaped and includes a linear tool shaft i1 that is inserted into the holder, a curved tool portion i2 that extends to one side of the tool shaft, and a cap-shaped impact portion i3 that is attached to the other end of the tool shaft and to which the impact force of the hammer is applied during surgery. Impactors used in total hip replacement surgery include, in addition to the curved impactor handle described above, straight impactors (not shown, straight impactor handle) that have a linear external shape.

[0046] 7a to 7c designates a medical holder to which the impactor and impact reduction device c are attached, and this medical holder h is formed with a holder main body h1 having a roughly pipe shape, an impact reduction device insertion portion h2 having an inner diameter large enough to forcibly fit the outer diameter of the impact reduction device c into the front portion of the holder main body, and a reducing portion h3 with a reduced inner diameter so that the impact reduction device c is not pushed rearward even when an external force is applied to it. The holder main body h1 is provided with locking means h4 that limits the movement of surgical tools and holds them rotatably.

[0047] Unexplained symbol j denotes an arm connecting member formed on holder h so as to be attached to a robot arm (not shown), and k denotes an acetabulum cup that is inserted and installed in the acetabulum of the hip joint.

[0048] The operation of the device for reducing impact on a medical tool according to one embodiment of the present invention will be briefly described below.

[0049] Figures 7a to 7c are diagrams for explaining the operation of the impact reduction device for a medical tool according to the first embodiment of the present invention, where Figure 7a is an oblique view showing a state in which an impact reduction device c and an impactor i are attached to a medical holder h, Figure 7b is an enlarged view of the main parts for explaining the state in which the hammer has normally struck the striking portion of the impactor, and Figure 7c is an enlarged view of the main parts for explaining the state in which the hammer has missed the striking portion of the impactor.

[0050] 7a, the process of performing hip replacement surgery using the impact reduction device c of the medical tool according to the present invention is as follows: first, the impact reduction device c is attached to the impact reduction device insertion section h2, which is the front part of the medical holder h, and then an impactor i is inserted through the holder body h1. Then, an artificial acetabular cup k is attached to the end of the impactor i, and it is inserted and installed in the acetabulum (not shown) of the hip joint by manual surgery or robotic surgery.

[0051] More specifically, hip replacement surgery is typically performed by preparing the acetabulum of the hip joint using a reamer (not shown), inserting an artificial acetabular cup k into the prepared acetabulum, and then press-fitting and fixing it using an impactor i, and then connecting an artificial femoral head (not shown) to the acetabular cup. Therefore, the surgical process involves striking the impactor i using a hammer (not shown).

[0052] As shown in FIG. 7b, the impact surgical procedure using impactor i is performed by a user applying impact force to impact unit i3 using a hammer. When the impact direction of the hammer is coaxial with the axial direction of the impactor, which is the longitudinal direction of the impactor, stable treatment is possible. However, when the impact direction of the hammer deviates from the axial direction of the impactor and the impact force is applied to the impactor in a diagonal direction (off-axis), as shown in FIG. 7c, deformation, damage, and breakage of the medical holder and impactor may occur. However, the impact reduction device c provided in medical holder h absorbs the impact, preventing the above problem from occurring.

[0053] 4 and 7c, when the hammer is released, a displacement force in the diagonal direction is generated on the tool shaft i1 because the tool shaft i1 is inserted into the tool insertion hole 12. At the same time, the outer circumferential surface of the tool shaft exerts a displacement force on the elastic member 21, and the convex portion 212 contracts to absorb and cushion the impact force.

[0054] Furthermore, the medical tool impact reduction device c according to the present invention can be applied as an impact absorbing means for various surgical tools having tool shafts, in addition to the medical holder h for the artificial hip joint surgery.

[0055] 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.

[0056] The above describes the configuration and operation of a medical tool impact reduction device according to one embodiment of the present invention and a medical holder equipped with the same, but this is merely an example, and a person with ordinary knowledge in the art will understand that it is possible to replace and modify parts of the above-described embodiment without departing from the technical concept of the present invention.

[0057] 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]

[0058] The present invention can not only absorb and cushion abnormal impact forces applied to medical tools used in artificial joint surgery, such as knee replacement surgery, thereby preventing deformation and damage to medical holders, medical tools, and peripheral devices, but can also be applied as an impact reduction device to various medical tools and medical hole holders other than those used in artificial joint surgery.

Claims

1. In a shock-reducing device for a medical tool, 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; and a separation prevention member provided on the shock reduction device body to prevent separation of the shock absorbing member.

2. The device for reducing an impact force of a medical tool according to claim 1 , wherein the impact absorbing member includes an elastic member built into the body of the device for absorbing an impact force applied to the tool shaft.

3. The impact reduction device for a medical tool according to claim 2, characterized in that the elastic member is composed of a plurality of leaf springs formed in a convex shape so as to contact the outer surface of the tool shaft and absorb impact forces.

4. The separation prevention member is a first binding part that is bound to one end of the impact reduction device body and has a through hole that communicates with the tool insertion hole; and a first separation prevention flange that protrudes from an inner surface of the first binding part and has a first separation prevention protrusion that holds one end of the leaf spring so that it does not separate; 4. The medical tool impact reduction device according to claim 3, further comprising: a second binding portion bound to the other end of the impact reduction device body and having a through hole communicating with the tool insertion hole; and a second anti-detachment flange having a second anti-detachment protrusion that protrudes from the inner surface of the second binding portion and holds the other end of the leaf spring so as not to detach.

5. the leaf spring is formed to have a structure including locking portions formed on both ends and a convex portion that protrudes convexly toward the center of the tool insertion hole between the locking portions, The first binding portion and the second binding portion are formed in a disk shape with fastening holes drilled therein for fastening to the impact reduction device main body, The impact reduction device for a medical tool according to claim 4, characterized in that the first anti-detachment protrusion and the second anti-detachment protrusion protrude along the periphery of the through hole so as to provide a gap into which the engaging portion can be inserted and received when the first anti-detachment flange and the second anti-detachment flange are fastened to the impact reduction device main body.

6. the tool insertion hole of the impact reduction device body has a shape corresponding to that of the first separation prevention protrusion and the second separation prevention protrusion, and is formed so that an airtight member is inserted into the gap; The impact reduction device for a medical tool according to claim 5, characterized in that the first anti-detachment protrusion and the second anti-detachment protrusion have a planar guide plane portion formed thereon to guide the movement of the engaging portion when the leaf spring contracts and expands.

7. A medical holder to which a medical tool is attached, A medical holder equipped with a device for reducing an impact on a medical tool, characterized in that the device for reducing an impact on a medical tool according to any one of claims 1 to 6 is provided on the medical holder.

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