Impact reduction device for medical tool and medical holder having same

Abstract

The present disclosure relates to an impact reducing device for a medical tool and a medical holder having the same, and more particularly, to an impact reducing device for a medical tool capable of absorbing and buffering abnormal impact force applied to the medical tool, therefore, the medical retainer, the medical tool or the peripheral device is prevented from being deformed or damaged in advance; and a medical holder equipped with the impact reduction device. According to the present invention, an impact reduction device for a medical tool comprises: an impact reduction device body having a tool insertion hole formed therein, into which a tool shaft of the medical tool is inserted; an impact absorbing member provided in the impact reducing device body to absorb an impact applied to the medical tool; and a separation prevention member attached to the impact reduction device main body to prevent separation of the impact absorption member.

Description

Technical Field

[0001] The present disclosure relates to an impact reducing device for a medical tool and a medical retainer having the same, and more specifically to an impact reducing device for a medical tool and a medical retainer having the same, which absorbs and cushions abnormal impacts applied to the medical tool to prevent deformation or damage to the medical retainer, the medical tool or a peripheral device. Background Art

[0002] Generally, surgical treatment of joint diseases includes arthroscopic surgery, chondrocyte transplantation, etc., and includes artificial joint surgery for severe cases. As representative artificial joint surgeries, there are manual joint surgery performed manually by medical staff and robotic artificial joint surgery performed by a robot.

[0003] Robotic artificial joint surgery refers to a surgical procedure in which an artificial joint (or implant) is placed after cutting bone from the joint area by rotating the cutter of a cutting device mounted to the distal end of a position-variable arm of a robot based on information input into a computer, and using cutting tools such as drill bits, reamers for widening drill holes, and impactors for providing press-fitting force.

[0004] Artificial joint surgery is common in artificial knee joint surgery, and artificial hip joint surgery has also been gradually increasing recently.

[0005] Artificial hip joint surgery is generally performed by pre-processing the acetabulum of the hip joint using a reamer, inserting an artificial acetabular cup, pressing and fitting the artificial acetabular cup using an impactor, and then connecting an artificial femoral head.

[0006] As described above, the impactors used in artificial hip joint surgery include straight impactors (or straight impactor handles) and curved impactors (or curved impactor handles), wherein the straight impactors (or straight impactor handles) are shaped to have a straight structure, and the curved impactors (or curved impactor handles) are shaped to have a curved structure.

[0007] For example, the straight impactor includes an impactor shaft formed in a substantially rod shape, and a cap-shaped or disc-shaped striking portion formed at the rear of the impactor shaft.

[0008] The impactor is used in such a manner that the impactor shaft is inserted and held in the holder, and then the impact portion is strongly struck with a hammer to press and fit the artificial acetabular cup.

[0009] In the aforementioned process in which the medical staff strikes the impactor to perform surgery, if the striking direction of the hammer is misaligned with the longitudinal direction (i.e., the axial direction of the impactor) so that an impact force is applied to the impactor in an oblique direction (i.e., the wrong direction), the retainer and the impactor may be broken or damaged.

[0010] Furthermore, when the hammer misses the impactor, the impact force is even applied obliquely to the artificial acetabular cup, which not only adversely affects the surgery, but also causes injury or damage to the medical staff (or robot) holding the holder because the impact force of the hammer is transmitted to the medical staff (or robot).

[0012] [Related technical literature]

[0013] [Patent Document]

[0014] (Patent Document 1) Korean Patent Publication No. 10-2020-0115518, entitled “End effector, system, and method for impact prosthesis guided by a surgical robot”

[0015] (Patent Document 2) Korean Patent No. 10-2254406, entitled "Impactor for practicing surgical operations"

[0016] (Patent Document 3) Korean Patent No. 10-0822471, entitled "Tibia Impactor" Summary of the invention Technical issues

[0017] The present disclosure is conceived based on the foregoing description, and one aspect of the present disclosure is to provide an impact reduction device for a medical tool, which absorbs and buffers abnormal impact applied to the medical tool, and a medical holder having the same. Technical Solution

[0018] According to one aspect of the present disclosure, an impact reducing device for a medical tool includes: an impact reducing device body, which is formed with a tool insertion hole, and a tool shaft of the medical tool is inserted into the tool insertion hole; an impact absorbing member, which is placed in the impact reducing device body and absorbs the impact applied to the medical tool; and an anti-separation member, which is installed in the impact reducing device body to prevent separation of the impact absorbing member.

[0019] The shock absorbing member may include an elastic member embedded in the shock reducing device body to absorb shock applied to the tool shaft.

[0020] The elastic member may include a plurality of leaf springs convexly formed to contact an outer surface of the tool shaft and absorb impact force.

[0021] The anti-separation component may include a first anti-separation flange, the first anti-separation flange including a first connecting portion and a first anti-separation protrusion, the first connecting portion being connected to the first end of the impact reduction device body and forming a through hole connected to the tool insertion hole, the first anti-separation protrusion protruding from the inner surface of the first connecting portion and supporting the first end of the leaf spring so that it does not separate; and a second anti-separation flange, the second anti-separation flange including a second connecting portion and a second anti-separation protrusion, the second connecting portion being connected to the second end of the impact reduction device body and forming a through hole connected to the tool insertion hole, the second anti-separation protrusion protruding from the inner surface of the second connecting portion and supporting the second end of the leaf spring so that it does not separate.

[0022] Preferably, the leaf spring may be configured to include a fitting portion formed at opposite ends of the leaf spring and a protruding portion formed between the fitting portions and protruding convexly toward a center of the tool insertion hole.

[0023] The first connection portion and the second connection portion may be formed to have a disc shape and have fastening holes for coupling with the impact reducing device body.

[0024] The first and second anti-separation protrusions may protrude along a periphery of the through hole to provide a gap into which the mating portion is inserted and accommodated while the first and second anti-separation flanges are coupled to the impact reducing device body.

[0025] Preferably, the tool insertion hole of the impact reducing device body may be shaped to correspond to the first and second anti-separation protrusions so that the first and second anti-separation protrusions can be inserted therein and a sealing member can be inserted into the gap.

[0026] The first and second anti-separation protrusions may include a guide flat portion having a flat structure to guide movement of the fitting portion when the leaf spring is compressed and stretched.

[0027] According to an embodiment of the present disclosure, a medical holder is provided with a medical tool mounted thereon, and the medical holder is provided with the aforementioned impact reducing device for the medical tool. Beneficial Effects

[0028] According to the present disclosure, an impact reduction device for a medical tool and a medical retainer having the same are installed on a tool shaft of a medical tool subjected to impact, so that an impact absorbing member can absorb the impact to perform a buffering effect, thereby preventing the medical tool or peripheral device from being deformed or damaged.

[0029] In particular, when the impact reduction device for medical tools according to the present disclosure is applied to hip joint surgery in which the impactor is struck to press and assemble the implant into the hip joint, even if the hammer misses the impactor and causes the tool shaft to tilt and shift, the protruding portion of the elastic member absorbs the impact to perform a buffering effect, thereby preventing the retainer and the impactor from being deformed or damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a perspective view of an impact reduction device for a medical tool according to an embodiment of the present disclosure,

[0031] Figure 2 is an exploded perspective view of an impact reduction device for a medical tool according to an embodiment of the present disclosure,

[0032] Figure 3 is a perspective view for illustrating the internal structure of the impact reduction device for a medical tool according to an embodiment of the present disclosure,

[0033] Figure 4 is a side view of an impact reduction device for a medical tool according to an embodiment of the present disclosure,

[0034] Figure 5a and Figure 5b is a partially enlarged perspective view of an impact reduction device for a medical tool according to a first embodiment of the present disclosure, wherein Figure 5a is an enlarged view of the elastic member, Figure 5b is an enlarged view of the anti-separation component.

[0035] Figure 6 is a partially cut-away perspective view of an impact reduction device for a medical tool according to a first embodiment of the present disclosure, and

[0036] Figures 7a to 7c is a view for illustrating the operation of the impact reduction device for a medical tool according to the first embodiment of the present disclosure, wherein Figure 7a is a perspective view showing the impact reduction device c and the impactor i installed in the medical holder h, Figure 7b is a partially enlarged view for illustrating a state in which a hammer normally strikes an impact portion of an impactor, and Figure 7c It is a partially enlarged view for illustrating a state in which the hammer misses the striking portion of the impactor. DETAILED DESCRIPTION

[0037] Next, we will refer to Figures 1 to 7c Exemplary embodiments of the present disclosure are described in detail, wherein like reference numerals are denoted throughout. Figures 1 to 7c The same parts are referred to in the drawings.

[0038] Meanwhile, detailed descriptions of components and their operations and effects in the drawings will be simplified or omitted, which are easy for a person of ordinary skill in the art to understand from general techniques. In addition, the present disclosure is characterized by an impact reduction device for a medical tool, and thus the relevant components will be illustrated and described with emphasis, while other components will be simplified or omitted.

[0039] Figure 1 is a perspective view of an impact reduction device for a medical tool according to an embodiment of the present disclosure, Figure 2 is an exploded perspective view of an impact reduction device for a medical tool according to an embodiment of the present disclosure, Figure 3 is a perspective view for illustrating the internal structure of the impact reduction device for a medical tool according to an embodiment of the present disclosure, Figure 4 is a side view of an impact reduction device for a medical tool according to an embodiment of the present disclosure, Figure 5a and Figure 5b is a partially enlarged perspective view of an impact reduction device for a medical tool according to a first embodiment of the present disclosure, wherein Figure 5a is an enlarged view of the elastic member, Figure 5b is an enlarged view of the anti-separation member, and Figure 6 is a partially cut-away perspective view of an impact reducing device for a medical tool according to a first embodiment of the present disclosure.

[0040] refer to Figures 1 to 6 Even if an abnormal impact is applied to the medical tool, the impact reducing device c for the medical tool according to the embodiment of the present disclosure will prevent damage to the medical holder, medical tools, etc. or adverse effects on the operation by absorbing and buffering the abnormal impact. The impact reducing device c includes an impact reducing device body 1, an impact absorbing member 2, an anti-separation member 3 and a sealing member 4.

[0041] The impact reduction device body 1 refers to a component installed in a holder h, which holds a medical tool such as an impactor i. The impact reduction device body 1 serves as a part of a basic frame and is formed with a tool insertion hole 12, into which a tool axis i1 of the medical tool is inserted.

[0042] The impact reducing device body 1 is shaped substantially in a cylindrical shape, and is formed with a tool insertion hole 12 into which a tool shaft i1 of a medical tool such as an impactor i is inserted.

[0043] The tool insertion hole 12 is formed to correspond to the first anti-separation protrusion 312 and the second anti-separation protrusion 322 (to be described later) so that the first anti-separation protrusion 312 and the second anti-separation protrusion 322 can be inserted therein, but its inner diameter is larger than the outer diameter of the first anti-separation protrusion 312 and the second anti-separation protrusion 322 so that a gap t for inserting the sealing member 4 and inserting the elastic member 21 is formed between the tool insertion hole 12 and the first anti-separation protrusion 312 and the second anti-separation protrusion 322. For example, the tool insertion hole 12 is formed as a hole approximately in the shape of a triangular prism, which has three hole flat portions 121 for inserting three leaf springs and three round edge portions 122 for connecting the hole flat portions 121.

[0044] Furthermore, the impact reducing device body 1 is formed on the front and rear surfaces thereof with fastening holes 15 which are in contact with the tool insertion hole 12 so as to be coupled with the fastening screws 9 .

[0045] Meanwhile, the shock absorbing member 2 refers to a component placed in the shock reducing device body 1 and absorbing shock applied to the medical tool, and includes an elastic member 21 embedded in the shock reducing device body 1 to absorb shock applied to the tool shaft i1.

[0046] The elastic member 21 can be formed to have various shapes and structures without particular limitation, as long as it can absorb and buffer the tilting impact transmitted from the tool shaft i1. Considering that the shape of the tool shaft i1 in the present embodiment is similar to a round bar, the elastic member 21 includes a plurality of leaf springs that are convexly formed to contact the outer surface of the tool shaft i1 and absorb the impact.

[0047] Preferably, the leaf spring is configured to have a fitting portion 211 formed at both ends thereof, and a protruding portion 212 formed between the fitting portions 211 and protruding convexly toward the center of the tool insertion hole 12, and the protruding portion 212 can be formed by bending and folding a rectangular plate material. In addition, the leaf spring can be manufactured by selecting any material as long as it has elasticity without particular limitation. According to this embodiment, the leaf spring is manufactured using a stainless steel thin metal plate excellent in hygiene and durability.

[0048] At the same time, the anti-separation component 3 refers to a component installed in the impact reduction device body 1 to prevent the impact absorbing component 2 from separating, and the anti-separation component 3 includes a first anti-separation flange 31 and a second anti-separation flange 32 connected to the first end and the second end (i.e., the two ends of the impact reduction device body 1).

[0049] The first anti-separation flange 31 includes a first connecting portion 311 and a first anti-separation protrusion 312. The first connecting portion 311 is connected to the first end of the impact reduction device body 1 and is formed with a through hole 313 connected to the tool insertion hole 12. The first anti-separation protrusion 312 protrudes from the inner surface of the first connecting portion 311 and supports the first end of the leaf spring to prevent separation.

[0050] Furthermore, the first connection portion 311 is formed with a through hole 313 formed at the center of the body shaped substantially in a disk shape and a plurality of fastening holes 314 drilled at equal angles for coupling with the impact reducing device body 1 .

[0051] The second anti-separation flange 32 includes a second connecting portion 321 and a second anti-separation protrusion 322. The second connecting portion 321 is connected to the second end of the impact reduction device body 1 and is formed with a through hole 323 connected to the tool insertion hole 12. The tool insertion hole 12 is formed in the center of the body which is roughly shaped like a disk. The second anti-separation protrusion 322 protrudes from the inner surface of the second connecting portion 321 and supports the second end of the leaf spring from separation.

[0052] Similar to the first connection portion 311 , the second connection portion 321 has a structure of a through hole 323 and a plurality of fastening holes 324 formed in a disk-shaped body.

[0053] The first and second anti-separation protrusions 312 and 322 protrude along the peripheries of the through holes 313 and 323 to provide a gap t into which the mating portion 211 is inserted and accommodated when the first and second anti-separation flanges 31 and 32 are coupled to the impact reducing device body 1 .

[0054] In particular, the first and second anti-separation protrusions 312 and 322 are characterized by including guide flat portions 315 and 325 having a flat structure to guide the movement of the fitting portion when the leaf spring is compressed and stretched.

[0055] The sealing member 4 refers to a component that maintains the seal of the connection area between the separation preventing member 3 and the impact reducing device body 1 , and is provided as a sealing ring, a so-called O-ring.

[0056] at the same time, Figure 7aThe unexplained symbol i in shows that a curved impactor (or a curved impactor handle) is installed in a medical holder h, wherein the curved impactor (or the curved impactor handle) is roughly formed into a rod shape and includes a tool shaft i1 having a straight structure to be inserted into the holder, a tool bending portion i2 extending toward a first side of the tool shaft i1, and a cap-shaped impact portion i3 installed at a second end of the tool shaft i1 and receiving an impact force from a hammer during surgery. In addition to the aforementioned curved impactor i (or the curved impactor handle), the impactor used in artificial hip joint surgery includes a straight impactor (not shown, or a straight impactor handle) whose appearance is formed to have a straight structure, etc.

[0057] also, Figures 7a to 7c The unexplained symbol h in shows a medical holder on which an impactor and an impact reducing device c are mounted, the medical holder h comprising a holder body h1 roughly formed into a pipe shape, an impact reducing device insertion portion h2 having an inner diameter such that the outer diameter of the impact reducing device c can be forcibly fitted into the front portion of the holder body h1, and a reducing portion h3 having a reduced inner diameter to prevent the impact reducing device c from being pushed backward even when an external force is applied to the impact reducing device c. The holder body h1 is provided with a locking device h4 for limiting the movement of a surgical tool or rotatably supporting the surgical tool.

[0058] Unexplained symbol j shows an arm connection member formed in the holder h and mounted to a robot arm (not shown), and unexplained symbol k shows an acetabular cup to be inserted and mounted in the acetabulum of the hip joint.

[0059] Next, the operation of the impact reducing device for a medical tool according to an embodiment of the present disclosure will be briefly described.

[0060] Figures 7a to 7c is a view for illustrating the operation of the impact reduction device for a medical tool according to the first embodiment of the present disclosure, wherein Figure 7a is a perspective view showing the impact reduction device c and the impactor i installed in the medical holder h, Figure 7b is a partially enlarged view for illustrating a state in which a hammer normally strikes an impact portion of an impactor, and Figure 7c It is a partially enlarged view for illustrating a state in which the hammer misses the striking portion of the impactor.

[0061] The process of performing artificial hip joint surgery using the aforementioned impact reduction device c for medical tools according to the present disclosure is as follows. Figure 7aAs shown, the impact reducing device c is installed in the impact reducing device insertion part h2 (i.e., the front part of the medical holder h), and the impactor i is ready to be inserted into the holder body h1. Then, the artificial acetabular cup k is installed to the end of the impactor i, and the artificial acetabular cup k is inserted and installed into the acetabulum (not shown) of the hip joint by a manual surgical method or a robotic surgical method.

[0062] In more detail, artificial hip joint surgery is usually performed by pre-processing the acetabulum of the hip joint using a reamer (not shown), inserting an artificial acetabular cup k into the pre-processed acetabulum, pressing and fixing the artificial acetabular cup k using an impactor i, and connecting an artificial femoral head (not shown) to the acetabular cup. Therefore, the surgical procedure involves striking the impactor i with a hammer (not shown).

[0063] The above-mentioned operation process of impacting the impactor i is carried out in such a way that the user uses Figure 7b The hammer shown applies an impact force to the impact portion i3. When the impact direction of the hammer is aligned with the axial direction (i.e., the longitudinal direction of the impactor), a stable surgical operation is performed. On the other hand, when the impact direction of the hammer is misaligned with the axial direction of the impactor, as shown in FIG. Figure 7c As shown, and the impact is applied to the impactor in an oblique direction (ie, the wrong direction), the medical holder and the impactor may be deformed, damaged, and broken. However, the impact reduction device c installed in the medical holder h performs a shock absorbing function, thereby preventing the above problems.

[0064] In addition, the aforementioned impact absorbing function of the impact reducing device c is performed in the following manner: since the tool shaft i1 is inserted into the tool insertion hole 12, the accidental strike of the hammer applies a displacement force to the tool shaft i1 in the oblique direction, such as Figure 4 and 7c As shown, and at the same time the protruding portion 212 becomes flat to absorb and cushion the impact, while the outer peripheral surface of the tool shaft i1 applies a displacement force to the elastic member 21.

[0065] Furthermore, the impact reducing device c for a medical tool according to the present disclosure may be used as an impact absorbing device for various surgical tools having a tool shaft in addition to a medical holder h for artificial hip joint surgery.

[0066] The terms "including", "configuration" and / or "having" specify the presence of the components, unless there is an obviously different meaning in the present disclosure, but do not exclude their presence, and should be interpreted as further including other components. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as those generally understood by those skilled in the art to which the present disclosure belongs. Common terms defined in dictionaries should be interpreted as having a consistent meaning in the context of the relevant field, and will not be interpreted as having an idealized or overly formal meaning unless clearly defined in the present disclosure.

[0067] Although the impact reduction device for medical tools and the configuration and operation of the medical retainer having the device according to the embodiments of the present disclosure have been described so far, those skilled in the art will understand that all or part of the embodiments of the present disclosure may be modified or replaced without departing from the technical spirit of the present disclosure.

[0068] Therefore, it should be understood that the scope of the present disclosure falls within the appended claims and their equivalents. Industrial Applicability

[0069] By utilizing the impact reducing device for medical tools and the medical retainer having the device according to the present disclosure, abnormal impact applied to the medical tool used for artificial joint surgery (such as artificial knee joint surgery) is absorbed and buffered to prevent the medical retainer, medical tool or peripheral device from being deformed or damaged, and the impact reducing device can also be used as an impact reducing device for various medical tools or medical retainers other than medical tools or medical retainers used for artificial joint surgery.

Claims

1. An impact reduction device for a medical tool, comprising: an impact reduction device body, formed with a tool insertion hole, into which a tool shaft of the medical tool is inserted; a shock absorbing member placed in the shock reducing device body and absorbing shock applied to the medical tool; and An anti-separation member is installed in the impact reducing device body to prevent separation of the impact absorbing member.

2. The impact reduction device according to claim 1, wherein: The shock absorbing member includes an elastic member embedded in the shock reducing device body to absorb shock applied to the tool shaft.

3. The impact reducing device according to claim 2, wherein: The elastic member includes a plurality of leaf springs which are convexly formed to contact with an outer surface of the tool shaft and absorb impact.

4. The impact reducing device according to claim 3, wherein: The anti-separation component comprises: a first anti-separation flange including a first connection portion connected to a first end of the impact reducing device body and formed with a through hole communicating with the tool insertion hole, and a first anti-separation protrusion protruding from an inner surface of the first connection portion and supporting the first end of the leaf spring so as not to separate; and The second anti-separation flange includes a second connecting portion and a second anti-separation protrusion, wherein the second connecting portion is connected to the second end of the impact reduction device body and is formed with a through hole connected to the tool insertion hole, and the second anti-separation protrusion protrudes from the inner surface of the second connecting portion and supports the second end of the leaf spring so that it does not separate.

5. The impact reducing device according to claim 4, wherein: The leaf spring is configured to include a fitting portion formed at opposite ends of the leaf spring and a protruding portion formed between the fitting portions and protruding convexly toward the center of the tool insertion hole, The first connection portion and the second connection portion are formed to have a disc shape and have fastening holes for coupling with the impact reducing device body, and The first and second anti-separation protrusions protrude along a periphery of the through hole to provide gaps in which the mating portion is inserted and accommodated while the first and second anti-separation flanges are coupled to the impact reducing device body.

6. The impact reducing device according to claim 5, wherein: The tool insertion hole of the impact reducing device body is shaped to correspond to the first and second anti-separation protrusions so that the first and second anti-separation protrusions can be inserted therein and a sealing member can be inserted into the gap, and The first and second anti-separation protrusions include guide flat portions having a flat structure to guide movement of the fitting portion when the leaf spring is compressed and stretched.

7. A medical holder having a medical tool mounted thereon, the medical holder being provided with an impact reduction device for the medical tool according to any one of claims 1 to 6.

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