Impact reduction device for medical tools and medical holder equipped therewith

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 reducing device for a medical tool and a medical holder including the same, and more particularly, to an impact reducing device for a medical tool capable of preventing deformation and damage to a medical holder, a medical tool and peripheral devices in advance by absorbing and buffering an abnormal impact force applied to the medical tool, and a medical holder including the same. [[BACKGROUND ART]]

[0002] Generally, surgical treatment for joint diseases includes arthroscopic surgery, chondrocyte transplantation, etc. In the case of severe diseases, patients undergo artificial joint surgery. Typical artificial joint surgery includes manually performed artificial joint surgery by medical staff and robot-assisted artificial joint surgery.

[0003] Robot-assisted artificial joint surgery is a surgical method in which, in accordance with information input to a computer, a cutter of a cutting device mounted on a distal end of a position-variable arm of a robot is rotated to cut bone at a joint site, and an artificial joint (implant) is attached. The surgery uses cutting tools such as drills, reamers for expanding a hole, and impactors for providing a press-fitting force.

[0004] Total knee arthroplasty is a common artificial joint surgery, and in recent years, total hip arthroplasty has also gradually increased.

[0005] Total hip arthroplasty is generally performed in the following manner: after pre-treating the acetabulum of the hip joint using a reamer, an artificial acetabulum cup is inserted, then the cup is press-fitted and fixed using an impactor, and an artificial femoral head is connected.

[0006] The impactors used in artificial hip joint surgery, as described above, include straight impactors (straight impactor handles) with a straight external shape and curved impactors (curved impactor handles) with a curved external shape.

[0007] For example, a straight impactor consists of an impactor shaft formed in a roughly rod shape and a cap or disc-shaped striking part formed at the rear end of this impactor shaft.

[0008] The aforementioned inspector is used by inserting the inspector shaft into the holder and gripping it, then forcefully striking the rear end of the hammer to press-fit the artificial acetabular cup.

[0009] As mentioned above, during the process of medical staff striking the impactor to perform a procedure, if the direction of the hammer's strike is deviated from the axial direction, which is the longitudinal direction of the impactor, and the impact force is applied to the impactor in an oblique direction (off-center), there is a problem that it can induce damage or breakage to the holder and the impactor.

[0010] Furthermore, if the hammer detaches, the diagonal impact force is also applied to the artificial acetabular cup, which not only negatively impacts the surgery but also transmits the hammer's impact force to the medical staff (or robot) holding the holder, potentially causing injuries or damage to the robot. [Prior art documents] [Patent Documents]

[0011] [Patent Document 1] Korean Published Patent No. 10-2020-0115518, "End effector, system and method for impacting a prosthesis guided by a surgical robot." [Patent Document 2] Korean Registered Patent No. 10-2254406 "Impactor for Medical Procedures" [Patent Document 3] Korean Registered Patent No. 10-0822471 "Tibia Impactor" [Overview of the project] [Problems that the invention aims to solve]

[0012] This invention was proposed in view of the above-mentioned aspects, and aims to provide a medical tool impact reduction device and a medical holder equipped therewith, which are capable of absorbing and cushioning abnormal impact forces applied to medical tools. [Means for solving the problem]

[0013] To achieve the above objective, the shock reduction device for a medical tool according to the present invention is characterized by comprising: a shock reduction device body having a tool insertion hole into which the tool shaft of the medical tool is inserted; a shock absorbing member disposed on the shock reduction device body and absorbing the shock acting on the medical tool; and a detachment prevention member provided on the shock reduction device body to prevent the shock absorbing member from detaching.

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

[0015] On the other hand, the elastic member can be composed of a plurality of leaf springs that are convex in shape to contact the outer surface of the tool shaft and absorb impact force.

[0016] The detachment prevention member may be configured to include: a first fastening portion fastened to one end of the shock-reducing device body and having a through hole that communicates with the tool insertion hole; a first detachment prevention flange having a first detachment prevention projection that protrudes from the inner surface of the first fastening portion and holds one end of the leaf spring so as not to detach; a second fastening portion fastened to the other end of the shock-reducing device body and having a through hole that communicates with the tool insertion hole; and a second detachment prevention flange having a second detachment prevention projection that protrudes from the inner surface of the second fastening portion and holds the other end of the leaf spring so as not to detach.

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

[0018] The first and second fastening portions can be formed in a disc shape with fastening holes drilled for fastening to the main body of the shock-reducing device.

[0019] The first detachment prevention projection and the second detachment prevention projection can protrude along the periphery of the through hole such that, when the first detachment prevention flange and the second detachment prevention flange are fastened to the impact reduction device body, a gap is provided into which the locking portion is inserted and received.

[0020] Preferably, the tool insertion hole of the impact reduction device body has a shape corresponding to that into which the first detachment prevention projection and the second detachment prevention projection are inserted, and can be formed so that an airtight member is inserted into the gap.

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

[0022] A medical holder provided with an impact reducing 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 aforementioned impact reducing device for a medical tool is provided on said medical holder. [[Advantageous Effects of Invention]]

[0023] According to the impact reducing device for a medical tool and the medical holder provided with the same according to the present invention, when provided on the tool shaft of a medical tool that is subjected to an impact force, the impact absorbing member absorbs the impact force and provides a buffering effect, so deformation and damage to the medical tool and peripheral devices can be prevented in advance.

[0024] In particular, when the impact reducing device for a medical tool according to the present invention is applied to hip surgery in which an impact is applied to press fit an implant into the hip joint, even if the hammer is dislodged and induces displacement of the tool shaft in an oblique direction, the protruding portion of the elastic member absorbs the impact force and provides a buffering effect, so deformation and damage to the holder and the impactor can be prevented in advance. [[Brief Description of the Drawings]]

[0025] [Figure 1] It is a perspective view showing an impact reducing device for a medical tool according to an embodiment of the present invention. [Figure 2] It is an exploded perspective view showing an impact reducing device for a medical tool according to an embodiment of the present invention. [Figure 3] It is a perspective view for explaining the internal structure of an impact reducing device for a medical tool according to an embodiment of the present invention. [Figure 4] It is a side view showing an impact reducing device for a medical tool according to an embodiment of the present invention. [Figure 5a] It is an enlarged perspective view of essential parts of the impact reducing device for a medical tool according to the first embodiment of the present invention, showing an enlarged view of the elastic member. [Figure 5b] It is an enlarged perspective view of essential parts of the impact reducing device for a medical tool according to the first embodiment of the present invention, showing an enlarged view of the detachment prevention member. [Figure 6]This is a partially cut perspective view of an impact reduction device, a medical tool according to a first embodiment of the present invention. [Figure 7a] This drawing illustrates the operation of an impact reduction device for a medical tool according to a first embodiment of the present invention, and is a perspective view showing a medical holder h equipped with an impact reduction device c and an impactor i. [Figure 7b] This is a drawing illustrating the operation of an impact reduction device for a medical tool according to a first embodiment of the present invention, and is an enlarged view of a key part illustrating the state in which a hammer has properly struck the striking part of an impactor. [Figure 7c] This is a drawing illustrating the operation of an impact reduction device for a medical tool according to a first embodiment of the present invention, and is an enlarged view of a key part illustrating the state in which the hammer has come off the striking part of the impactor. [Modes for carrying out the invention]

[0026] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached Figures 1 to 7c, and identical components in Figures 1 to 7c will be given the same reference numerals.

[0027] On the other hand, in each drawing, detailed explanations of the configuration, its operation, and its effects, which can be easily understood by a person with general technical knowledge or ordinary knowledge in this field, are simplified or omitted. Furthermore, since the present invention is characterized by an impact reduction device for medical tools, the illustrations and explanations focus on the parts related to this, and the explanations of the remaining parts are simplified or omitted.

[0028] Figure 1 is a perspective view showing an impact reduction device for a medical tool according to one embodiment of the present invention; Figure 2 is a separated perspective view showing an impact reduction device for a medical tool according to one embodiment of the present invention; Figure 3 is a perspective view illustrating the internal structure of an impact reduction device for a medical tool according to one embodiment of the present invention; Figure 4 is a side view showing an impact reduction device for a medical tool according to one embodiment of the present invention; Figures 5a and 5b are enlarged perspective views of the main parts of an impact reduction device for a medical tool according to the first embodiment of the present invention, with Figure 5a being an enlarged view of the elastic member and Figure 5b being an enlarged view of the detachment prevention member. Figure 6 is a partially cut 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, the impact reduction device c for medical tools according to one embodiment of the present invention is designed to prevent damage to medical holders, medical tools, etc., and adverse effects on surgery by absorbing and cushioning abnormal impact forces applied to medical tools, and comprises an impact reduction device body 1, an impact absorbing member 2, a detachment prevention member 3, and an airtight member 4.

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

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

[0032] The tool insertion hole 12 has a shape corresponding to the insertion of the first detachment prevention projection 312 and the second detachment prevention projection 322, which will be described later. It is formed in a way that the inner diameter is larger than the diameter of the first detachment prevention projection 312 and the second detachment prevention projection 322 so that a gap t is provided between the first detachment prevention projection and the second detachment prevention projection for the insertion of the airtight member 4 and the elastic member 21. For example, the tool insertion hole 12 is formed as a roughly triangular prism-shaped hole having three flat hole surfaces 121 and three curved top surfaces 122 connecting the hole surfaces 121 so that three leaf springs can be inserted.

[0033] Furthermore, the impact reduction device body 1 has fastening holes 15 formed on its front and rear surfaces that are in contact with the tool insertion hole 12 for fastening the fastening screws 9.

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

[0035] The elastic member 21 can be formed into various shapes and structures without special limitations, as long as it can absorb and cushion the diagonal impact force transmitted from the tool shaft i1. However, in this embodiment, considering that the tool shaft i1 is a round rod-shaped shaft, the main feature is that it is composed of multiple leaf springs that are formed in a convex shape to contact the outer surface of the tool shaft and absorb the impact force.

[0036] Preferably, the leaf spring has a structure having locking portions 211 formed at both ends and a convex portion 212 that protrudes convexly towards the center of the tool insertion hole 12 between the locking portions 211, and can be formed by processing a rectangular plate material by bending and shaping. The leaf spring can be made from any elastic material without any special restrictions, but in this embodiment, it is made using a thin sheet of stainless steel metal, which has excellent hygiene and durability.

[0037] On the other hand, the detachment prevention member 3 is a component provided on the shock reduction device body 1 to prevent the shock absorption member 2 from detaching, and consists of a first detachment prevention flange 31 and a second detachment prevention flange 32 connected to one end and the other end, which are both ends of the shock reduction device body 1.

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

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

[0040] The second detachment prevention flange 32 is attached to the other end of the impact reduction device body 1 and includes a second fastening portion 321 having a substantially disc-shaped body with a through hole 323 that communicates with the tool insertion hole 12, and a second detachment prevention projection 322 that protrudes from the inner surface of the second fastening portion 321 and holds the other end of the leaf spring so that it does not detach.

[0041] The second fastening portion 321, like the first fastening portion 311, has a disc-shaped body with a through hole and a plurality of fastening holes 323 formed therein.

[0042] The first detachment prevention projection 312 and the second detachment prevention projection 322 protrude along the periphery of the through holes 313 and 323 such that a gap t is provided into which the locking portion 211 is inserted and received when the first detachment prevention flange 31 and the second detachment prevention flange 32 are fastened to the impact reduction device body 1.

[0043] In particular, the first detachment prevention projection 312 and the second detachment prevention projection 322 are characterized by having planar guide planes 315 and 325 formed 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 point between the detachment prevention member 3 and the shock absorption device body 1, and is provided with an airtight ring commonly referred to as an O-ring.

[0045] On the other hand, the unexplained symbols in Figure 7a indicate the state in which a curved impactor handle is attached to a medical holder h. This curved impactor handle is formed in a roughly rod shape and comprises a straight tool shaft i1 that is inserted into the holder, a curved tool section i2 that extends to one side of the tool shaft, and a cap-shaped impact section i3 provided at the other end of the tool shaft to which the hammer striking force is applied during surgery. In addition to the curved impactor handle i described above, other impactors used in artificial hip joint surgery include straight impactors (not shown, straight impactor handle) which have a straight external shape.

[0046] Furthermore, the unexplained reference numeral h in Figures 7a to 7c is a medical holder into which the impactor and impact absorbing device c are mounted. This medical holder h has a holder body h1 which is substantially pipe-shaped, an impact absorbing device insertion part h2 which has an inner diameter large enough to allow the outer diameter of the impact absorbing device c to be forcibly fitted into the front part of the holder body, and a reducing part h3 which has a reduced inner diameter so that the impact absorbing device c is not pushed backward even when an external force is applied to it. The holder body h1 is provided with locking means h4 which restrict the movement of surgical tools or hold them rotatably.

[0047] The unexplained symbol j is an arm connecting member formed on the holder h to be attached to a robot arm (not shown), and k is an acetabulum-cup that is inserted into and provided in the acetabulum of the hip joint.

[0048] The following briefly describes the operation of the impact reduction device for a medical tool according to one embodiment of the present invention.

[0049] Figures 7a to 7c are diagrams illustrating the operation of an impact reduction device for a medical tool according to the first embodiment of the present invention. Figure 7a is a perspective view showing a medical holder h equipped with an impact reduction device c and an impactor i. Figure 7b is an enlarged view of the main part illustrating a state in which the hammer has successfully struck the striking part of the impactor. Figure 7c is an enlarged view of the main part illustrating a state in which the hammer has missed the striking part of the impactor.

[0050] Looking at the procedure for performing artificial hip joint surgery using the impact-reducing device c of the medical tool according to the present invention described above, as shown in Figure 7a, first, the impact-reducing device c is installed in the impact-reducing device insertion section h2, which is the front part of the medical holder h, while the impactor i is inserted through the holder body h1 to prepare it. Then, an artificial acetabular cup k is attached to the end of the impactor i and inserted and installed in the acetabulum (not shown) of the hip joint via a manual or robotic surgical method.

[0051] To explain in more detail, artificial hip joint surgery is usually performed by pre-treating the acetabulum of the hip joint using a reamer (not shown), inserting an artificial acetabular cup k into the pre-treated acetabulum, pressing and fixing it in place 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 with a hammer (not shown).

[0052] As shown in Figure 7b, the impact surgery process of the aforementioned impactor i is performed by the user applying impact force to the impact part i3 using a hammer. When the direction of the hammer's impact is coaxial with the axial direction, which is the longitudinal direction of the impactor, a stable procedure can be performed. However, as shown in Figure 7c, when the direction of the hammer's impact is offset from the axial direction of the impactor and the impact force is applied to the impactor in the diagonal direction (off-axis), it may cause deformation, damage, and breakage of the medical holder and the impactor. However, since the impact reduction device c is provided on the medical holder h, the aforementioned problems can be prevented by performing an impact absorption action.

[0053] Furthermore, as shown in Figures 4 and 7c, the shock absorption action of the shock reduction device c is performed in such a way that, since the tool shaft i1 is inserted into the tool insertion hole 12, a displacement force is generated on the tool shaft i1 in the diagonal direction when the hammer comes loose. At the same time, the outer circumferential surface of the tool shaft acts as a displacement force on the elastic member 21, and the convex portion 212 contracts to absorb and cushion the impact force.

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

[0055] The terms "contains," "constitutes," or "possesses," as used above, mean, unless otherwise stated, that the constituent element may be inherent, and should be interpreted as potentially including other constituent elements rather than excluding them. All terms, including technical or scientific terms, have the same meaning as they would be generally understood by a person of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as those defined in dictionaries, should be interpreted as corresponding to their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this invention.

[0056] The configuration and operation of the impact reduction device for a medical tool and the medical holder equipped therewith according to one embodiment of the present invention have been described above. However, this is illustrative, and those with ordinary skill in the art will understand that it is possible to substitute and modify parts of the above-described embodiments without departing from the technical spirit of the present invention.

[0057] Therefore, the scope of protection of the present invention should be understood to extend to the invention described in the claims and its equivalents. The invention described in the original claims of this application is listed below. [1] In impact reduction devices for medical tools, The shock absorption device body comprises a tool insertion hole formed therein into which the tool shaft of the aforementioned medical tool is inserted, An impact-absorbing member is arranged in the main body of the impact reduction device and absorbs the impact acting on the medical tool, A shock-reducing device for a medical tool, characterized by including a detachment prevention member provided on the main body of the shock-reducing device to prevent the shock-absorbing member from detaching. [2] The shock-absorbing member is characterized in that it includes an elastic member built into the shock-reducing device body so as to absorb the shock applied to the tool shaft, as described in [1], for a medical tool shock-reducing device. [3] The impact reduction device for a medical tool according to [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 force. [4] The aforementioned detachment prevention member is A first fastening portion is attached to one end of the main body of the shock-reducing device and has a through hole that communicates with the tool insertion hole; and a first detachment prevention flange has a first detachment prevention projection that protrudes from the inner surface of the first fastening portion and holds one end of the leaf spring so that it does not detach. The shock-reducing device for a medical tool according to [3], comprising: a second fastening portion fastened to the other end of the shock-reducing device body and having a through hole formed therein that communicates with the tool insertion hole; and a second detachment prevention flange having a second detachment prevention projection that protrudes from the inner surface of the second fastening portion and holds the other end of the leaf spring so as not to detach. [5] The leaf spring is formed with a structure having locking portions formed at both ends and a convex portion that protrudes convexly towards the center of the tool insertion hole between the locking portions. The first and second fastening portions are formed in a disc shape with fastening holes perforated for fastening to the main body of the shock-reducing device, The impact reduction device for a medical tool according to [4], characterized in that the first detachment prevention projection and the second detachment prevention projection protrude along the periphery of the through hole such that a gap is provided for the insertion and reception of the locking portion when the first detachment prevention flange and the second detachment prevention flange are fastened to the impact reduction device body. [6] The tool insertion hole of the impact reduction device body has a corresponding shape into which the first detachment prevention projection and the second detachment prevention projection are inserted, and is formed so that an airtight member is inserted into the gap. The impact reduction device for a medical tool according to [5], characterized in that the first detachment prevention projection and the second detachment prevention projection have planar guide planes formed to guide the movement of the locking portion when the leaf spring contracts and expands. [7] In a medical holder into which a medical tool is attached, A medical holder equipped with a medical tool impact reduction device, characterized in that the medical tool impact reduction device described in any one of [1] to [6] is provided on the medical holder. [Industrial applicability]

[0058] This invention can absorb and buffer abnormal impact forces applied to medical tools used in artificial joint surgery, such as artificial knee joint surgery, thereby preventing deformation and damage to medical holders, medical tools, and peripheral devices. Furthermore, it can 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 impact reduction devices for medical tools, The shock absorption device body comprises a tool insertion hole formed therein into which the tool shaft of the aforementioned medical tool is inserted, An impact-absorbing member is arranged in the main body of the impact reduction device and absorbs the impact acting on the medical tool, The shock absorption member is provided on the main body of the shock reduction device to prevent it from detaching, and includes a detachment prevention member. The shock-absorbing member includes an elastic member built into the shock-reducing device body to absorb the shock applied to the tool shaft, The elastic member is composed of a plurality of leaf springs that are convexly formed to contact the outer surface of the tool shaft and absorb impact force. The aforementioned detachment prevention member is A first fastening portion is attached to one end of the main body of the shock-reducing device and has a through hole that communicates with the tool insertion hole; and a first detachment prevention flange has a first detachment prevention projection that protrudes from the inner surface of the first fastening portion and holds one end of the leaf spring so that it does not detach. A shock-reducing device for a medical tool, characterized by comprising: a second fastening portion fastened to the other end of the shock-reducing device body and having a through hole formed therein that communicates with the tool insertion hole; and a second detachment prevention flange having a second detachment prevention projection that protrudes from the inner surface of the second fastening portion and holds the other end of the leaf spring so that it does not detach.

2. The leaf spring is formed with a structure having locking portions formed at both ends and a convex portion that protrudes convexly towards the center of the tool insertion hole between the locking portions. The first fastening portion and the second fastening portion are formed in a disc shape with fastening holes perforated for fastening to the shock-reducing device body, The impact reduction device for a medical tool according to claim 1, characterized in that the first detachment prevention projection and the second detachment prevention projection protrude along the periphery of the through hole such that a gap is provided for the insertion and reception of the locking portion when the first detachment prevention flange and the second detachment prevention flange are fastened to the impact reduction device body.

3. The tool insertion hole of the impact reduction device body has a corresponding shape into which the first detachment prevention projection and the second detachment prevention projection are inserted, and is formed so that an airtight member is inserted into the gap. The impact reduction device for a medical tool according to claim 2, characterized in that the first detachment prevention projection and the second detachment prevention projection are formed with planar guide planes to guide the movement of the locking portion when the leaf spring contracts and expands.

4. In a medical holder into which a medical tool is attached, A medical holder equipped with a medical tool impact reduction device, characterized in that the impact reduction device for a medical tool described in any one of claims 1 to 3 is provided on the medical holder.

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