Medical surgical device with a moving distance display function for a tool

Abstract

To provide a medical surgical device having a tool movement distance display function, which enables a target movement distance of a tool to be known accurately and quickly during a surgical process, thereby making it possible not only to improve the accuracy of the surgery but also to shorten the surgery time and enhance convenience of the surgery.SOLUTION: The medical surgical device having the tool movement distance display function includes: a medical tool including a tool shaft; a holder body with a tool mounting hole formed internally to insert the medical tool therein; tool support means to support the medical tool inserted in the holder body; and a movement distance indicator to indicate a movement distance of the medical tool.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a medical surgical device having a moving distance display function for a tool. More specifically, the present invention relates to a medical surgical device having a moving distance display function for a tool that can accurately and quickly know the target moving distance of the tool during the surgical process, thereby improving the surgical accuracy, shortening the surgical time, and improving the usability of the surgery.

Background Art

[0002] Generally, surgical treatments for joint diseases include arthroscopic surgery, chondrocyte transplantation, etc. In the case of severe diseases, artificial joint surgery is performed. Artificial joint surgery is typically performed as manual artificial joint surgery by medical personnel and artificial joint surgery using a robot.

[0003] Artificial joint surgery using a robot is a surgical method in which a cutter of a cutting device attached to the end of a position-variable arm of a robot is rotated according to information input into a computer, the bone at the joint site is cut, and an artificial joint (implant) is attached. Cutting tools such as drills, reamers for reaming, and impactors for providing press-fitting force are used.

[0004] Artificial knee joint surgery has become widespread, and in recent years, artificial hip joint surgery has gradually increased.

[0005] Artificial hip joint surgery is usually performed by pre-treating the acetabulum of the hip joint using a reamer, inserting an artificial acetabulum cup, and then press-fitting and fixing it using an impactor, and connecting the artificial femoral head. At this time, since the artificial acetabulum cup is larger than the diameter of the acetabulum pre-treated by the reamer, it is inserted and installed by a press-fitting method using an infector.

[0006] On the one hand, the aforementioned reamer includes a straight reamer whose external shape is formed in a linear structure, and a bent reamer such as an offset reamer whose external shape is formed in a bent form and is called an offset reamer, etc.

[0007] And the impactor includes a straight impactor handle whose external shape is formed in a linear structure, and a curved impactor handle such as a curved impactor whose external shape is in a bent form, etc.

[0008] On the other hand, impactors such as the above-mentioned straight impactor handle and curved impactor handle will be used by medical personnel to perform surgery while applying an impact force in a state of being installed in a medical tool holder during use.

[0009] And as a medical tool holder, technologies such as "Tool, Kit of Parts for Multifunctional Tool, Robot System for Multifunctional Tool" registered in Korean Registered Patent No. 10-1609281 (Registration Date: March 30, 2016) have been proposed.

[0010] The tool mounted on the end of the robot arm according to Korean Registered Patent No. 10-1609281 allows medical personnel to perform hip arthroplasty while hitting the impactor, but there are limitations with the following problems.

[0011] For example, the tool according to Korean Registered Patent No. 10-1609281 presses and installs the artificial acetabular cup into the acetabulum of the hip joint using the impactor as described above, but it is impossible to confirm whether the artificial acetabular cup has been inserted to the set target point of the acetabulum, which acts as a factor hindering stable surgery, reduces the quality of the surgery, increases not only the surgery time but also the fatigue of medical personnel.

[0012] In particular, since the diameter of a normal artificial acetabular cup is larger than the diameter of the acetabulum, if the impact force and position are not accurately set during impact, the insertion depth of the acetabulum cannot be accurately measured due to factors such as the impactor being pushed backward, making accurate surgery even more difficult.

Prior Art Documents

Patent Documents

[0013]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0014] The present invention has been proposed by paying attention to the above content, and by enabling the accurate and rapid knowledge of the target movement distance of the tool during the surgical process, it improves the surgical accuracy, and aims to provide a medical surgical device having a tool movement distance display function that can shorten the surgical time and improve the usability of the surgery.

Means for Solving the Problems

[0015] In order to achieve the above object, a medical surgical device having a tool movement distance display function according to the present invention includes a medical tool having a tool shaft, a holder body having a tool mounting hole formed therein for inserting the medical tool, tool support means for supporting the medical tool inserted into the holder body, and movement distance display means for displaying the movement distance of the medical tool.

[0016] The movement distance display means can be configured to include a displacement portion for sensing the movement distance formed on the tool shaft and interlocking with the tool shaft, and a movement distance display portion for sensing and displaying the displacement of the displacement portion for sensing the movement distance.

[0017] The displacement part for sensing the moving distance can be formed on the tool shaft in a structure having a distance sensing inclined surface with a gradually increasing diameter in the forward direction of the medical tool.

[0018] The moving distance display part can be provided on the holder body so that the measurement end contacts and moves on the distance sensing inclined surface, and includes a distance display gauge for displaying the moving distance corresponding to the height of the distance sensing inclined surface.

[0019] The distance display gauge can be an analog dial gauge including a stem provided with a measuring element at an end, a pointer coupled to the stem and rotated according to the degree of protrusion and retraction of the measuring element, and a display housing incorporating a scale plate on which the pointer rotates, or a digital dial gauge including a stem provided with a measuring element that protrudes and retracts, and a display part coupled to the stem and displaying numbers according to the degree of protrusion and retraction of the measuring element.

[0020] The holder body can form a fastening boss communicating with the tool mounting hole so that the stem is provided at a position corresponding to the displacement part for sensing the moving distance.

[0021] Preferably, the moving distance display means can be formed on the exposed part of the tool shaft of the medical tool inserted into the holder body and include an axial scale part having a plurality of scales.

[0022] The axial scale part is formed to be located on the surface of the tool shaft behind the holder body, and can be configured to be set in a manner of matching the scale corresponding to the rear end of the holder body when setting the desired target moving distance of the medical tool.

[0023] The medical tool can be an impactor used in hip joint surgery, in which an artificial acetabular cup is coupled to the front of the tool shaft and a striking part for applying a striking force is provided behind it.

[0024] The tool support means can include a tool support guide member that guides movement while supporting the tool shaft.

[0025] The medical surgical device having a moving distance display function for a tool according to the present invention includes a holder support member coupled to the holder body, and the tool mounting hole is formed with a guide member mounting groove portion on the inner peripheral surface for placing the tool support guide member, and a support member mounting groove portion formed in contact with the guide member mounting groove portion so that a holder binding member for installing the holder support member is provided, and a tool mounting groove portion formed at one end of the tool mounting hole for installing the medical tool.

[0026] And the medical surgical device having a moving distance display function for a tool according to the present invention can be configured to include a shock reduction device provided on the holder body to absorb and buffer the impact force applied to the holder body, and a shock reduction device insertion portion formed at the other end of the tool mounting hole of the holder body for installing the shock reduction device.

[0027] Further, the medical surgical device having a moving distance display function for a tool according to the present invention includes tool binding means configured to restrain the medical tool inserted into the tool mounting groove portion, and the tool binding means includes a binding hole drilled in the holder body in communication with the inside of the tool mounting groove portion, a tool binding member inserted through the binding hole, and a locking portion formed on the medical tool so that the tool binding member is drawn in and locked.

Advantages of the Invention

[0028] According to the medical surgical device having a moving distance display function for a tool according to the present invention, since it is provided with moving distance display means for displaying the moving distance for recognizing the moving distance of the medical tool, during the surgical process, medical personnel can accurately and quickly recognize the target moving distance of the tool, which can improve the accuracy of the surgery and has the effect of shortening the surgical time and improving the usability of the surgery.

[0029] In particular, since the moving distance display means can confirm the remaining distance to the target position of the artificial acetabular cup through the graduations of the axial graduation part together with the graduations of the moving distance display part in plural, accuracy can be ensured, and even if a failure occurs in the moving distance display part constituted by a dial gauge, medical staff can conveniently confirm the remaining distance, so there is an advantage of further improving the accuracy, reliability, and usability of the surgery.

Brief Explanation of Drawings

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7a

Figure 7b

Figure 7c

Figure 8

Figure 9

Figure 10a

Figure 10b

Figure 10c

Figure 10d

Figure 10e

Figure 10f

Figure 10g

Figure 10h

Figure 11

Best Mode for Carrying Out the Invention

[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same reference numerals will be given to the same components for explanation.

[0032] On the other hand, for the configuration that can be easily known by those having ordinary knowledge in this field from the general technology in each figure, and the detailed description of the actions and effects thereof will be simplified or omitted. Further, since the present invention is characterized by a medical surgical device having a moving distance display function of a tool, the illustration and description will be centered on the related parts, and the description of the remaining parts will be simplified or omitted. The medical surgical device having a moving distance display function of a tool according to an embodiment of the present invention can be used for applications that measure the moving distance while holding various medical tools applied to surgical operations, etc. Hereinafter, it will be described based on an example applied to an impactor used in hip arthroplasty surgery. Note that hereinafter, the front and the forward direction mean the direction of the medical tool toward the surgical site, and the rear and the backward direction mean the opposite direction of the front.

[0033] FIG. 1 is a schematic configuration diagram for explaining the technical idea of a medical surgical device having a tool movement distance display function according to an embodiment of the present invention, and FIG. 2 is a perspective view schematically showing the usage state of a medical surgical device as an overall configuration diagram for explaining a medical surgical device having a tool movement distance display function according to an embodiment of the present invention. FIG. 3 is a separated perspective view in which the main configuration of a medical surgical device having a tool movement distance display function according to an embodiment of the present invention is separated, and FIG. 4 is a cross-sectional view showing a medical surgical device having a tool movement distance display function according to an embodiment of the present invention. FIG. 5 is an incision perspective view showing a main part of a medical surgical device having a tool movement distance display function according to an embodiment of the present invention, showing the state in which a distance display gauge is attached and the separated state, respectively. FIG. 6 is a diagram for explaining the operating state of a medical surgical device having a tool movement distance display function according to an embodiment of the present invention, where (a) shows the state where the insertion of the artificial acetabular cup is completed, and (b) shows the state where the target position (Impacting Depth) of the artificial acetabular cup is set, respectively.

[0034] Referring to FIGS. 1 to 6, a medical surgical device having a tool movement distance display function according to an embodiment of the present invention is for improving the accuracy of surgery by enabling accurate and convenient knowledge of the movement distance of a tool during the surgical process, and is particularly characterized in that it is embodied so that the depth of the artificial acetabular cup to the insertion target position i of the pelvic bone can be easily recognized during hip joint replacement surgery.

[0035] A medical surgical device having a tool movement distance display function according to an embodiment of the present invention includes a medical tool t having a tool shaft t11, a holder body 1 having a tool mounting hole formed therein for inserting the medical tool, a tool support means 2 for supporting the medical tool inserted into the holder body, a tool binding means 3 for binding the medical tool t to the holder body 1, and a holder support member 4 for installing the holder body on an arm (not shown) of a medical robot, and is provided with a movement distance display means 9 for displaying the movement distance for recognizing the movement distance of the medical tool t.

[0036] Here, the moving distance d means the distance to the set target position (Impacting Depth) of the artificial acetabular cup c or the remaining distance to the set target position i.

[0037] The moving distance display means 9 is formed on the tool shaft t11 and includes a displacement part 91 for detecting the moving distance that interlocks with the tool shaft, and a moving distance display part 92 that senses and displays the displacement of the displacement part 91 for detecting the moving distance.

[0038] And the moving distance display means 9 includes the displacement part 91 for detecting the moving distance and the moving distance display part 92, and there is no particular limitation on the form and structure as long as it can effectively display the moving distance of the tool shaft t11. However, in this embodiment, it is configured to detect and display the moving distance by a mechanical contact method so as to ensure reliability as follows.

[0039] For example, the displacement part 91 for detecting the moving distance is formed on the tool shaft t11 with a structure having a distance sensing inclined surface 911 whose diameter gradually increases in the forward direction of the medical tool t1.

[0040] And the displacement part 91 for detecting the moving distance has no particular limitation on the form, structure, etc. as long as it has the structure of the distance sensing inclined surface 911. However, in this embodiment, it is formed in a substantially conical shape. At this time, the inclination of the distance sensing inclined surface 911 is formed such that when the tool shaft t11 moves 1 mm, the pointer of the distance display gauge changes by 1 mm.

[0041] The moving distance display part 92 is provided on the holder body 1 so that the measurement end contacts and moves on the distance sensing inclined surface 911, and is composed of a distance display gauge that displays the moving distance corresponding to the height of the distance sensing inclined surface 911.

[0042] The distance display gauge is composed of an analog dial gauge including a stem 921 provided with a spindle 922 having a measuring element 923 at its end, a pointer 924 coupled to the stem 921 and rotated according to the degree of protrusion and retraction (vertical movement) of the measuring element 923, and a display housing 926 incorporating a scale plate 925 on which the pointer rotates. And, as is well known, the analog dial gauge incorporates a gear part (not shown) such as a rack and pinion and a spiral spring (not shown) that rotates the pointer 924 corresponding to the movement of the spindle 922 inside the display housing 926, and is of a well-known configuration, so specific illustration is omitted.

[0043] And, although not shown in the drawings, the distance display gauge can be composed of a digital dial gauge (not shown) including a stem provided with a spindle having a measuring element at its end, and a display part coupled to the stem and having numbers displayed according to the degree of protrusion and retraction of the measuring element.

[0044] Also, the moving distance display means 9 can be configured to be able to transmit the sensed moving distance to a surgical control terminal or the control unit of a surgical robot.

[0045] As shown in FIG. 5, a fastening boss 115 communicating with the tool mounting hole 12 is formed to protrude on the holder body 1 such that a stem 921 is provided at a position corresponding to the displacement part 91 for sensing the moving distance.

[0046] On the other hand, the moving distance display means 9 can recognize the moving distance of the tool shaft t11 at various positions, and a shaft scale part 93 is formed on the medical tool t so that it can be recognized and confirmed without error in duplicate with the distance display gauge.

[0047] The shaft scale part 93 includes a plurality of scales 931 formed at the exposed part of the tool shaft t11 of the medical tool t inserted into the holder body 1, and Arabic numerals for displaying the distance.

[0048] Preferably, the axial scale portion 93 is formed so as to be located on the tool shaft t11 behind the holder body 1. When setting the desired target movement distance of the medical tool, it can be set by drawing in such a way that the scale corresponding to the target movement distance coincides with the end portion behind the holder body 1 (on the line of the tip at the rear of the holder body).

[0049] The medical tool t is not particularly limited as long as it is a medical tool having a tool shaft t11. Hereinafter, an example in which an impactor t1 is applied will be described as a reference. The impactor t1 can be a straight impactor handle having a linear structure in terms of its external shape. In the present embodiment, an example in which a curved impactor handle having a bent external shape is applied will be described as a reference.

[0050] The curved impactor is formed in a substantially rod shape and includes a tool shaft t11 having a linear structure that is movably inserted into the holder body 1, a tool bent portion t12 extending to one side of the tool shaft, and a cap-shaped striking portion t13 provided at the end of the other side of the tool shaft, to which the striking force of a hammer is applied during surgery.

[0051] The curved impactor is movably inserted into the tool shaft t11 and is provided with an impactor fixing member 5 that is coupled to the tool mounting groove portion 15 of the holder body 1 described later, and a locking portion 33 described later is formed.

[0052] FIG. 7a is an exploded perspective view showing a separated state of the tool shaft portion at the "A" part in FIG. 3, FIG. 7b is an enlarged view of the "A" part in FIG. 4, and FIG. 7c is an enlarged view of the "B" part in FIG. 4. FIG. 8 is an exploded perspective view showing the holder body portion of a medical surgical device having a tool movement distance display function according to an embodiment of the present invention, and FIG. 9 is a diagram for explaining the process of attaching a medical tool to the holder body of a medical surgical device having a tool movement distance display function according to an embodiment of the present invention.

[0053] Referring to Fig. 7a, the impactor fixing member 5 includes a cylindrical body 51 inserted into the tool shaft t11 and having a locking portion 33 formed therein, and a retaining ring 52 protruding outside the cylindrical body 51.

[0054] As shown in Figs. 4 to 8, 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 a hollow column body 11 for inserting the medical tool.

[0055] The hollow column body 11 includes a holder body 111 having a pipe shape, a shock reduction device mounting portion 112 formed with an inner diameter portion into which the outer diameter portion of the shock reduction device 8 is forcibly fitted at the rear portion of the holder body, and a reducing portion 113 formed with a reduced inner diameter so as not to be pushed backward even when an external force acts on the shock reduction device 8.

[0056] As shown in Figs. 7c and 8, the tool mounting hole 12 is formed with a guide member mounting groove portion 13 formed on the inner peripheral surface for mounting the tool support guide member 21, a support member mounting groove portion 14 formed in contact with the guide member mounting groove portion 13 so that the holder binding member 16 for installing the holder support member 4 is provided, and a tool mounting groove portion 15 formed at one end of the tool mounting hole 12 for inserting the medical tool.

[0057] The support member mounting groove portion 14 is composed of a bolt insertion hole 141 having a bolt head insertion groove and a screw portion insertion groove for inserting a bolt 161 described later, and a pin insertion hole 142 inserted in contact with the bolt insertion hole.

[0058] 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 support rod 41 and the holder body 1.

[0059] And, in the holder body 1, a bolt insertion hole 19 through which a bolt can be inserted when the bolt 161 is fastened is drilled downward so as to be coaxial with the bolt insertion hole 141, and a rod placement surface 18 on which the lower end of the holder support rod 41 is placed is formed flat.

[0060] On the other hand, the tool support means 2 includes a tool support guide member 21 that guides the movement while supporting the medical tool inserted into the holder body 1 as a component for supporting the medical tool.

[0061] The tool support guide member 21 is configured by a sliding support body whose outer peripheral surface is coupled to the inner peripheral surface of the guide member mounting groove portion 13 provided in the tool mounting hole 12, and the tool shaft t11 is inserted into the inner peripheral surface. Here, the sliding support body may be configured by a bearing, but in this embodiment, a plurality of sliding bushes called normal oil-free bushes or the like are provided.

[0062] On the other hand, the holder support member 4 is a component in which one side is coupled to the holder body 1 and the other side is provided on an arm or the like of a medical robot so as to perform the support function of the holder body 1.

[0063] The holder support member 4 includes a holder support rod 41 having one end coupled to the holder body 1, a connecting plate 42 formed at the other end of the holder support rod 41, and an arm connecting member 43 that binds to the connecting plate 42.

[0064] The holder support rod 41 is a rod-shaped member formed obliquely, and in a state where the lower end is placed on the rod placement surface 18 of the holder body 1, it is engaged by the bolt 161 and the set pin 162 described above, and bolt fastening holes 412 and pin insertion holes 413 are formed at positions corresponding to the bolt insertion hole 141 and the pin insertion hole 142 described above.

[0065] On the one hand, the tool binding means 3 is a component for restraining the medical tool t inserted into the tool mounting groove portion 15, and can be configured without particular limitation as long as the binding and releasing operations of the medical tool are possible. However, in this embodiment, it is characterized in that the structure is simple and the various medical tools can be detachably attached in a compatible manner.

[0066] As shown in FIGS. 7a, 7c, and 8, 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 t so that the tool binding member 32 is hooked and locked.

[0067] The tool binding member 32 is composed of a screw portion 321 fastened to the binding hole 31 and a locking protrusion 322 formed at the end of the screw portion 321 and inserted into the locking portion 33.

[0068] The locking portion 33 is formed on the impactor fixing member 5, and includes an inflow groove 331 recessed at the inner end of the cylindrical body 51 and a locking groove 332 bent and extending in a substantially "¬" shape in the inflow groove.

[0069] The mounting process of the medical tool t using the above-described tool binding means 3 will be briefly described with reference to FIG. 9. As shown in part (a) of FIG. 9, the locking protrusion 322 of the tool binding member 32 is aligned so as to coincide with the inflow groove 331. After the medical tool t1 is press-fitted and enters the inside of the inflow groove 331 as shown in part (b) of FIG. 9, as shown in part (c) of FIG. 9, when it is rotated along the locking groove 332 at an angle of about 30°, it is drawn into the concave end portion 333 of the locking groove 332 by the elastic force of the elastic pressing portion. Therefore, the medical tool t1 is stably fixed without coming off.

[0070] On the other hand, as shown in FIGS. 7a and 8, the tool mounting groove portion 15 is provided with an elastic pressing portion 7 that applies an elastic force to stably bind the medical tool inserted therein.

[0071] The elastic pressing part 7 includes a compression coil spring 71 that provides an elastic force to the part of the medical tool t flowing into the tool mounting groove part 15, and a pressing ring 72 that presses the medical tool by the elastic force applied from the compression coil spring 71.

[0072] The attached drawings, FIGS. 10a to 10h, are diagrams for explaining a shock reduction device of a medical surgical device having a tool movement distance display function according to an embodiment of the present invention. FIG. 10a is a separated perspective view, FIG. 10b is a perspective view for explaining the internal structure, FIG. 10c is a side view, FIG. 10d is an enlarged view of an elastic member, FIG. 10e is an enlarged view of a detachment prevention member, and FIG. 10f is a partially cutaway perspective view. FIGS. 10g and 10h are diagrams for explaining the usage state of the shock reduction device. FIG. 10g is an enlarged view of a main part for explaining a state where a hammer normally strikes a striking part of an impactor, and FIG. 10h is an enlarged view of a main part for explaining a state where a hammer hits the impactor striking part deviatingly.

[0073] Referring to FIGS. 10a to 10h, a medical surgical device having a tool movement distance display function according to an embodiment of the present invention is provided in a holder main body 1 and a shock reduction device installation part 112, and includes a shock reduction device 8 that absorbs and buffers an impact force applied to the holder main body 1.

[0074] The shock reduction device 8 includes a shock reduction device main body 81, a shock absorption member 82, a detachment prevention member 83, and an airtight member 84. Even if an abnormal impact force is applied to the medical tool, it absorbs and buffers the impact force to prevent damage to the holder main body 1, the medical tool t, etc. and adverse effects on the surgery.

[0075] The shock reduction device main body 81 is a part that functions as a basic skeleton, and is a component provided on the holder main body 1 into which a medical tool such as an impactor t1 is inserted. A tool insertion hole 812 into which the tool shaft t11 of the medical tool is inserted is formed.

[0076] The impact reduction device body 81 is formed in a substantially cylindrical shape, and a tool insertion hole 812 is formed therein so that a tool shaft t11 of a medical tool such as an impactor t1 can be inserted therein.

[0077] The tool insertion hole 812 has a corresponding shape so that the first and second anti-separation protrusions 8312 and 8322, which will be described later, can be inserted therein, and a gap d for inserting an airtight member 84 and an elastic member 821 is provided between the tool insertion hole 812 and the first and second anti-separation protrusions. The inner diameter dimension of the tool insertion hole 812 is formed in a form that is larger than the diameters of the first and second anti-separation protrusions 8312 and 8322. For example, the tool insertion hole 812 is formed as a substantially triangular prism-shaped hole having three flat hole plane portions 8121 into which three leaf springs are inserted and three curved surface tops 8122 connecting the hole plane portions 8121.

[0078] And fastening holes 815 for fastening fastening screws 89 are formed in the front and rear surfaces of the impact reduction device body 81 that are in contact with the tool insertion hole 812.

[0079] On the other hand, the shock absorption member 82 is a component that is disposed in the impact reduction device body 81 and absorbs the impact acting on the medical tool, and is composed of an elastic member 821 incorporated in the impact reduction device body 81 so as to absorb the impact applied to the tool shaft t11.

[0080] The elastic member 821 can be formed in various shapes and structures without particular limitation as long as it can absorb and buffer the impact force in the diagonal direction transmitted from the tool shaft t11. However, in the present embodiment, considering that the tool shaft t11 is in a round bar shape, the main feature is that it 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 the impact force.

[0081] Preferably, the leaf spring is formed in a structure having locking portions 8211 formed at both ends and a convex portion 8212 protruding convexly in the central direction of the tool insertion hole 812 between the locking portions 8211, and can be formed by bending and shaping a rectangular plate material. And the leaf spring can be selected and manufactured without particular limitation as long as it is a material having elasticity. In this embodiment, it is manufactured using a stainless steel thin plate excellent in hygiene and durability.

[0082] On the other hand, the detachment prevention member 83 is a component provided on the shock reduction device main body 81 so as to prevent the detachment of the shock absorption member 82, and is composed of a first detachment prevention flange 831 and a second detachment prevention flange 832 connected to one end and the other end which are both ends of the shock reduction device main body 81.

[0083] The first detachment prevention flange 831 is fastened to one end of the shock reduction device main body 82, and includes a first fastening portion 8311 in which a through hole 8313 communicating with the tool insertion hole 812 is formed, and a first detachment prevention protrusion 8312 protruding from the inner surface of the first fastening portion 8311 to support one end of the leaf spring so as not to detach.

[0084] And the first fastening portion 8311 has a through hole 8313 formed at the center of a main body having a substantially disc shape, and a plurality of fastening holes 8314 for fastening to the shock reduction device main body 81 are drilled at equal angles.

[0085] The second detachment prevention flange 832 is fastened to the other end of the shock reduction device main body 81, and includes a second fastening portion 8321 in which a through hole 8323 communicating with the tool insertion hole 812 is formed in a main body having a substantially disc shape, and a second detachment prevention protrusion 8322 protruding from the inner surface of the second fastening portion 8321 to support the other end of the leaf spring so as not to detach.

[0086] The second fastening portion 8321 has a structure in which a through hole and a plurality of fastening holes 8323 are formed in a disc-shaped main body, similar to the first fastening portion 8311.

[0087] The first and second anti-disengagement protrusions 8312 and 8322 protrude along the peripheral edges of the through holes 8313 and 8323 so that a gap d is provided for the locking portion 8211 to be inserted and accommodated in a state where the first and second anti-disengagement flanges 831 and 832 are fastened to the shock absorption device body 81.

[0088] In particular, the first and second anti-disengagement protrusions 8312 and 8322 are characterized in that guide plane portions 8315 and 8325 having a planar structure are formed so as to guide the movement of the locking portion during the contraction and expansion of the leaf spring.

[0089] The airtight member 84 is provided with an airtight ring, which is usually called an O-ring, as a component for maintaining the airtightness of the connection portion between the anti-disengagement member 83 and the shock absorption device body 81.

[0090] On the other hand, the reference numeral r2 in FIG. 2 is an arm connection portion provided on the arm of the surgical robot so that the holder support member can be connected.

[0091] Hereinafter, the operation of the medical surgical device having the moving distance display function of the tool according to an embodiment of the present invention will be briefly described.

[0092] FIG. 11 is a schematic configuration diagram for explaining the operation of the medical surgical device having the moving distance display function of the tool according to an embodiment of the present invention, where b is the hip bone, m is a marker (Pelvis Marker) attached to sense the position of the hip joint, and o is a position tracking camera (OTS Camera) for tracking the position of the hip joint.

[0093] Referring to FIGS. 1 to 11, the process of performing an artificial hip joint surgery usually involves preprocessing such as cutting the acetabulum of the hip joint using a reamer, then inserting an artificial acetabular cup (c, acetabulum-cup), and then press-fitting and fixing it using an impactor, and connecting an artificial femoral head.

[0094] For this purpose, first, the holder support member 4 of the holder body 1 is assembled to the arm of the artificial joint surgery robot, a reamer (not shown) is attached as a medical tool, and the acetabulum of the hip joint is cut through a rotational operation.

[0095] When such pretreatment procedures such as cutting are completed, the reamer is separated from the holder body 1 and the impactor t1 is assembled. The assembly of the impactor t1 is performed by inserting the tool shaft t11 into the tool mounting hole 12 and binding it using the tool binding means 3. As shown in part (a) of FIG. 9, the locking projection 322 of the tool binding member 32 is aligned so as to coincide with the inflow groove 331. After the medical tool t1 is press-fitted and enters the inside of the inflow groove 331 as shown in part (b) of FIG. 9, as shown in part (c) of FIG. 9, when it is rotated along the locking groove 332 at an angle of approximately 30°, it is drawn into the concave end portion 333 of the locking groove 332 by the elastic force of the elastic pressing portion. Therefore, the medical tool t1 is stably fixed without deviating.

[0096] On the other hand, when the assembly of the impactor t1 is completed, as shown in FIG. 11, an artificial acetabular cup is installed forward, and the impact portion t13 of the impactor t1 is struck using a hammer to move the tool shaft t1 forward, and the process of press-fitting the artificial acetabular cup (c, acetabulum-cup) into the acetabulum of the hip joint can be performed. At this time, since the holder body 1 is fixed to the arm of the surgical robot, the impactor t1 that has received the impact force is moved in the impact direction without moving.

[0097] The process of the impactor t1's impact surgery is performed in such a way that, as shown in Fig. 10g, the user applies an impact force to the striking part t13 using a hammer. When the striking direction of the hammer is coaxial with the axial direction which is the longitudinal direction of the impactor, stable surgery can be performed. However, as shown in Fig. 10h, when the striking direction of the hammer is deviated from the axial direction of the impactor and the impact force is applied to the impactor in an oblique direction (when hitting off-target), it may induce deformation, damage, and breakage of the holder body 1 and the impactor t1. Since the impact reduction device 8 is provided on the holder body 1, the above problem can be prevented by performing an impact absorption action.

[0098] And, as shown in Fig. 10h, since the tool shaft t1 is inserted into the tool insertion hole 812, the impact absorption action of the impact reduction device 8 is such that when the hammer hits off-target, a displacement force in the oblique direction is generated on the tool shaft t11. At the same time, the outer peripheral surface of the tool shaft acts on the elastic member 821 and the convex part 8212 absorbs and buffers the impact force while contracting.

[0099] On the other hand, to more specifically explain the process of hitting the impactor t1 and press-fitting the artificial acetabular cup c into the acetabulum of the hip joint as described above, the arm of the surgical robot is moved to the surgical position calculated based on the sensing action of the surgical robot, the position tracking camera o, and the marker m by the surgical operation software to set the impact at a fixed position. At this time, as shown in Fig. 6(b), the position of the tool shaft t11 is adjusted so that the remaining distance to the set target position (refer to the Impacting Depth in Fig. 1) of the artificial acetabular cup c to be inserted into the acetabulum of the hip joint can be known for the impact t.

[0100] When the tool shaft t11 moves backward only to the target position in this way, the measuring element 923 in contact with the surface of the distance sensing inclined surface 911 is pushed, so the pointer 924 of the analog dial gauge indicates the scale corresponding to the corresponding target position distance on the scale display plate 925, and the scale 931 of the axial scale part 93 also indicates the same target position distance.

[0101] In such a state, when the user applies a striking force to the striking part t13 using a hammer to move the artificial acetabular cup c including the tool shaft forward, the tool shaft will be pushed backward when hitting an interference object (such as a stump, skin tissue, etc.) existing at the acetabular entry site of the hip joint. However, while checking the scale of the movement distance display part 92 and the scale 931 of the axial scale part 93, the striking force is repeatedly applied, and the artificial acetabular cup c is press-fitted and placed at the target position i (see Fig. 1).

[0102] As described above, the remaining distance to the target position of the artificial acetabular cup c can be confirmed by the two scales of the scale of the movement distance display part 92 and the scale 931 of the axial scale part 93, so the accuracy can be guaranteed. Even if a failure occurs in the movement distance display part 92 composed of an analog dial gauge, there is an advantage that the user can conveniently confirm the remaining distance.

[0103] On the other hand, during the surgical process as described above, when the movement or movement of the patient is sensed by the position tracking camera o and the marker m, it can be performed after correcting the arm position of the surgical robot and rearranging the positions.

[0104] Terms such as "including", "comprising", or "having" described above are meant to imply that the component can be inherent, unless otherwise stated, and do not exclude other components, but should be interpreted as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by those with ordinary knowledge in the technical field to which the present invention belongs, unless otherwise defined. Commonly used terms, such as those defined in a dictionary, should be interpreted as consistent with the meaning in the context of the related art, and should not be interpreted as an ideal or overly formal meaning unless specifically defined in the present invention.

[0105] The configuration and operation of the medical surgical device having the moving distance display function of the tool according to the embodiment of the present invention described above have been described, but this is exemplary, and those having ordinary knowledge in the technical field should understand that it is possible to replace and modify a part of the above-described embodiment without departing from the technical idea of the present invention.

[0106] Therefore, it should be understood that the protection scope of the present invention extends to the invention described in the claims and its equivalents. The invention described in the claims of the present application at the time of filing is appended below. [1] A medical tool having a tool shaft, A holder body having a tool mounting hole formed therein for inserting the medical tool, Tool support means for supporting the medical tool inserted into the holder body, A medical surgical device having a moving distance display function of a tool, comprising moving distance display means for displaying a moving distance of the medical tool. [2] The moving distance display means, A displacement portion for detecting a moving distance formed on the tool shaft and interlocking with the tool shaft, and A moving distance display portion for detecting and displaying the displacement of the moving distance detection displacement portion, the medical surgical device having the moving distance display function of the tool according to [1] above. [3] The moving distance detection displacement portion is formed on the tool shaft in a structure having a distance detection inclined surface whose diameter gradually increases in the forward direction of the medical tool, The moving distance display portion is provided on the holder body so that a measurement end contacts and moves on the distance detection inclined surface, and includes a distance display gauge for displaying a moving distance corresponding to the height of the distance detection inclined surface. The medical surgical device having the moving distance display function of the tool according to [2] above. [4] The distance display gauge includes an analog dial gauge including a stem provided with a measuring element at an end, a pointer coupled to the stem and rotated according to the degree of protrusion and retraction of the measuring element, and a display housing incorporating a scale plate for rotating the pointer, or a digital dial gauge having a stem provided with a measuring element that protrudes and retracts, and a display portion coupled to the stem and displaying numbers according to the degree of protrusion and retraction of the measuring element. It is composed of, The holder body is characterized in that a fastening boss communicating with the tool mounting hole is formed so that the stem is provided at a position corresponding to the moving distance detection displacement portion. The medical surgical device having the moving distance display function of the tool according to [3] above. [5] The moving distance display means includes a shaft scale portion formed on an exposed portion of a tool shaft of the medical tool inserted into the holder body and having a plurality of scales, and is characterized in that it has the moving distance display function of the tool according to the above [1]. A medical surgical device. [6] The shaft scale portion is formed so as to be located on the surface of the tool shaft behind the holder body, and when setting a desired target moving distance of the medical tool, the scale corresponding to the rear end portion of the holder body is made to coincide. The medical surgical device having the moving distance display function of the tool according to the above [5], which is configured to be set in a matching manner. [7] The medical tool has an artificial acetabular cup coupled to the front of the tool shaft, and a striking portion for applying a striking force to the rear thereof, and is configured as an impactor used in hip joint surgery. The tool support means includes a tool support guide member that guides movement while supporting the tool shaft, and is characterized in that it has the moving distance display function of the tool according to any one of the above [1] to [6]. A medical surgical device. [8] Including a holder support member coupled to the holder body. The tool mounting hole includes a guide member mounting groove portion formed on the inner peripheral surface so that the tool support guide member is placed thereon, a support member mounting groove portion formed in contact with the guide member mounting groove portion so that a holder binding member for installing the holder support member is provided, and a tool mounting groove formed at one end of the tool mounting hole for installing the medical tool. The medical surgical device having the moving distance display function of the tool according to the above [7], which is characterized by including a portion. [9] An impact reduction device provided on the holder body for absorbing and buffering an impact force applied to the holder body, and For the installation of the impact reduction device, an impact reduction device insertion portion formed at the other end of the tool mounting hole of the holder body, and is characterized by including the medical surgical device having the moving distance display function of the tool according to the above [8].

[10] It is provided with a tool binding means configured to restrain the medical tool inserted inside the tool mounting groove portion. The tool binding means includes a binding hole drilled in the holder body so as to communicate with the inside of the tool mounting groove portion, a tool binding member inserted through the binding hole, and a locking portion formed on the medical tool so that the tool binding member is drawn in and locked. The medical surgical device having a function of displaying the moving distance of the tool according to [8] described above, characterized in that it includes the above.

Explanation of Symbols

[0107] 1: Holder body 11: Hollow column 12: Tool mounting worker 13: Guide member mounting groove part 14: Support member mounting groove part 15: Tool mounting groove part 16: Holder binding member 2: Tool support means 21: Tool support guide member 3: Tool binding means 31: Binding hole 32: Tool binding member 33: Locking part 4: Holder support member 41: Holder support rod 42: Connection plate 43: Arm connection member 5: Impactor fixing member 7: Elastic pressing part 71: Compression coil spring 72: Pressing ring 8: Impact reduction device 81: Impact reduction device body 82: Impact absorbing member 83: Separation prevention member 84: Confidential member 9: Moving distance display means 91: Displacement part for moving distance sensing 92: Moving distance display part 93: Axial scale part t: Medical tool t1: Impactor t11: Tool shaft

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 support means for supporting the medical tool inserted into the holder body; a movement distance display means for displaying a movement distance of the medical tool, A medical surgical device having a tool travel distance display function, characterized in that the travel distance display means is formed on an exposed portion of the tool shaft of the medical tool inserted into the holder body and includes an axial scale portion having a plurality of scales.

2. The travel distance display means A displacement portion for detecting a moving distance formed on the tool shaft and interlocking with the tool shaft; and 2. The medical operation device according to claim 1, further comprising a movement distance display unit for detecting and displaying the displacement of the movement distance sensing displacement unit.

3. The displacement portion for sensing the moving distance is formed on the tool shaft in a structure having a distance sensing inclined surface whose diameter gradually increases in a forward direction of the medical tool, The medical surgical device having a tool travel distance display function as described in claim 2, characterized in that the travel distance display unit is provided on the holder body so that a measuring end moves in contact with the distance sensing inclined surface, and includes a distance display gauge that displays the travel distance corresponding to the height of the distance sensing inclined surface.

4. The distance display gauge is an analog dial gauge including a stem equipped with a spindle having a measuring point at an end thereof, a pointer connected to the stem and rotated according to the degree of appearance and disappearance of the measuring point, and a display housing incorporating a scale plate around which the pointer rotates, or a digital dial gauge having a stem equipped with a measuring point that appears and disappears, and a display unit connected to the stem and displaying numbers according to the degree of appearance and disappearance of the measuring point, 4. A medical surgical device having a tool travel distance display function as described in claim 3, characterized in that the holder body is formed with a fastening boss communicating with the tool mounting hole so that the stem is provided at a position corresponding to the travel distance sensing displacement portion.

5. 2. The medical surgical device according to claim 1, wherein the axis scale portion is formed to be located on the surface of the tool shaft at the rear of the holder body, and is configured so that when setting a desired target travel distance of the medical tool, the scale corresponding to the rear end of the holder body can be set in a manner that aligns with the scale.

6. the medical tool is an impactor used in hip joint surgery, the impactor having an artificial acetabular cup coupled to the front of the tool shaft and a striking part for applying a striking force to the rear of the tool shaft; 6. A medical surgical device having a tool travel distance display function as claimed in any one of claims 1 to 5, wherein the tool support means includes a tool support and guide member that supports the tool shaft and guides its movement.

7. a holder support member coupled to the holder body, 7. A medical surgical device with a tool travel distance display function as described in claim 6, characterized in that the tool mounting hole includes a guide member mounting groove portion formed on an inner surface thereof so that the tool support and guide member can be placed on it, a support member mounting groove portion formed in contact with the guide member mounting groove portion so that a holder binding member for installing the holder support member can be provided, and a tool mounting groove portion formed at one end of the tool mounting hole for installing the medical tool.

8. An impact reduction device provided on the holder body for absorbing and cushioning an impact force applied to the holder body; and 8. The medical surgical device having a tool travel distance display function as claimed in claim 7, further comprising an impact reduction device insertion portion formed at the other end of the tool mounting hole of the holder body for installation of the impact reduction device.

9. 8. A medical surgical device with a tool travel distance display function as described in claim 7, characterized in that it comprises a tool binding means configured to restrain the medical tool inserted inside the tool mounting groove, the tool binding means including a binding hole drilled in the holder body so as to communicate with the inside of the tool mounting groove, a tool binding member inserted through the binding hole, and a locking portion formed on the medical tool so that the tool binding member is pulled in and locked.

Images