Intramedullary nail and insertion device coupling structure

Abstract

The present invention relates to a combined structure of an intramedullary fixation rod and an insertion device, and more specifically, to a combined structure of an intramedullary fixation rod and an insertion device for maintaining a stable combined state between the fixation rod and the insertion device during surgery. To achieve the above objective, the present invention provides a combined structure of an intramedullary fixation rod and an insertion device comprising: a fixation rod provided to be inserted into the bone marrow cavity; and an insertion device provided to insert the fixation rod into the bone marrow cavity, wherein the fixation rod is slid inward from one side of the insertion device to be primarily combined, and a fixation body provided in the insertion device is inserted into the fixation rod to be secondarily combined.

Description

Technology Field

[0001] The present invention relates to a combined structure of an intramedullary fixation rod and an insertion device, and more specifically, to a combined structure of an intramedullary fixation rod and an insertion device for maintaining a stable combined state between the fixation rod and the insertion device during surgery. Background Technology

[0003] In fracture treatment, intramedullary fixation rods are widely used as a representative internal fixation device to stably stabilize fractures of long bones (such as the femur, tibia, and humerus) and aid in the patient's rapid recovery. Intramedullary fixation rods are medical devices designed to be inserted into the bone's medullary cavity to stabilize the fracture site and withstand loads even during rehabilitation. An insertion device is essential for accurately inserting these rods into the bone, and it plays a crucial role in efficiently controlling the rod's orientation, aligning its position, and transmitting force during the surgical process.

[0004] The connection structure between the intramedullary fixation rod and the insertion device is a critical factor that must ensure stability during surgical manipulation and connection strength. The insertion device must be firmly connected to the fixation rod; if play or instability occurs at the connection site, it not only becomes difficult to accurately insert the rod into the bone marrow cavity but may also lead to unexpected malfunctions during surgery. In particular, the connection site between the insertion device and the fixation rod must be able to effectively withstand strong impact or rotational forces when applied during the insertion process.

[0005] However, conventional intramedullary fixation rods had several problems, such as the connection loosening and falling off during surgery, or play occurring at the connection site, which prolonged the surgery time.

[0006] Therefore, a combined structure of an intramedullary fixation rod and an insertion device having a more stable and efficient connection structure is required. Prior art literature

[0008] Korean Patent Publication No. 2019-0001609 The problem to be solved

[0009] The objective of the present invention to solve the above-mentioned problems is to provide a coupling structure of an intramedullary fixation rod and an insertion device for maintaining a stable coupling state between the fixation rod and the insertion device during surgery.

[0010] The technical problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art to which the present invention belongs from the description below. means of solving the problem

[0012] The present invention, for achieving the above-mentioned purpose, comprises a fixing rod arranged to be inserted into a bone marrow cavity; and an insertion mechanism arranged to insert the fixing rod into the bone marrow cavity, wherein the fixing rod is slid inward from one side of the insertion mechanism to be primarily coupled, and a fixing body provided in the insertion mechanism is inserted into the fixing rod to be secondarily coupled.

[0013] In an embodiment of the present invention, the fixing rod may be characterized by comprising: a rod portion that is inserted into the bone marrow cavity and extends along the longitudinal direction of the bone; and a rod coupling portion provided at the end of the rod portion and configured to be coupled with the insertion mechanism.

[0014] In an embodiment of the present invention, the insertion mechanism may be characterized by comprising: an insertion coupling part having a fixed body that is coupled to the rod coupling part; and an operating part provided on the upper part of the insertion coupling part and configured to insert the fixed body into the rod coupling part.

[0015] In an embodiment of the present invention, the insertion mechanism may further include a handle portion provided to extend in one direction from the insertion coupling portion to form a handle.

[0016] In an embodiment of the present invention, the fixed rod may be characterized by comprising: a sliding body provided at the end of the rod portion; an inclined surface formed on the upper surface of the sliding body and provided to form a downward slope toward the end; sliding grooves formed on both sides of the sliding body; and an insertion hole formed on the inclined surface so as to communicate the upper and lower portions of the sliding body.

[0017] In an embodiment of the present invention, the insertion coupling portion may be characterized by comprising: an upper body forming a body; a lower body extending from the end of the upper body; a pair of walls extending downward from both sides of the lower end of the lower body; and a protruding insert formed protruding from the inner surface of the walls and provided to be insertable into the sliding groove.

[0018] In an embodiment of the present invention, the fixed rod further includes an end groove formed at the end of the sliding body, and the insertion coupling part may further include a stopper formed at the lower part of the lower body, which is arranged to be inserted into the inner side of the end groove when the protruding insert is completely inserted into the sliding groove, thereby restricting the sliding body from being inserted further.

[0019] In an embodiment of the present invention, the insertion coupling portion may further include a shaft extending through the center of the upper body and the lower body; and the fixing member formed at the end of the shaft, wherein the fixing member is provided to be inserted into the insertion hole.

[0020] In an embodiment of the present invention, the fixing rod may further include a female screw thread in the form of a screw thread formed inside the insertion hole, and the fixing body may be characterized by having a screw thread formed on its outer surface that engages with the female screw thread, so that the fixing body and the insertion hole are screw-coupled.

[0021] In an embodiment of the present invention, the shaft may be connected to the operating part, and the fixed body may be configured to be inserted and fixed in the insertion hole by the operating part. Effects of the invention

[0023] The effect of the present invention according to the above configuration is that a fixed rod is first slidably inserted into the insertion mechanism and coupled, and in this state, a fixed body is inserted into the insertion hole and coupled secondarily, so a stable coupled state can be maintained.

[0024] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description of the invention or the claims. Brief explanation of the drawing

[0026] FIG. 1 is an exemplary diagram of a combined structure of an intramedullary fixation rod and an insertion mechanism according to an embodiment of the present invention. FIG. 2 is an enlarged view of the combined structure of an intramedullary fixation rod and an insertion mechanism according to an embodiment of the present invention. FIGS. 3 to 5 are perspective views of a fixed rod according to an embodiment of the present invention. FIGS. 6 to 8 are perspective views of an insertion mechanism according to an embodiment of the present invention. FIGS. 9 and FIGS. 10 are perspective views showing the state before a fixed rod according to an embodiment of the present invention is slid into the inner side of an insertion mechanism. FIG. 11 is a perspective view showing a state in which a fixed rod according to an embodiment of the present invention is slid and inserted into the inner side of an insertion mechanism. FIG. 12 is a perspective view showing a state in which a fixing body according to an embodiment of the present invention is inserted into an insertion hole and fixed secondarily. Specific details for implementing the invention

[0027] The present invention will be described below with reference to the attached drawings. However, the present invention can be implemented in various different forms and is therefore not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals.

[0028] Throughout the specification, when it is stated that a part is "connected (connected, in contact, combined)" with another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members interposed between them. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components.

[0029] The terms used herein are merely for describing specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0030] Additionally, terms such as "...part," "...unit," and "...module" described in the specification refer to a unit that processes at least one function or operation, and this may be implemented in hardware, software, or a combination of hardware and software.

[0031] Additionally, in this specification, when a step is described as being located "before" or "after" another step, this includes not only cases where a step is in a direct chronological relationship with another step, but also cases where there is an indirect chronological relationship in which the chronological order of the two steps may change, such as a mixing step following each step.

[0032] Embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0033] FIG. 1 is an exemplary diagram of a combined structure of an intramedullary fixation rod and an insertion device according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a combined structure of an intramedullary fixation rod and an insertion device according to an embodiment of the present invention.

[0034] FIGS. 3 to 5 are perspective views of a fixed rod according to an embodiment of the present invention, and FIGS. 6 to 8 are perspective views of an insertion mechanism according to an embodiment of the present invention.

[0035] FIGS. 9 and FIGS. 10 are perspective views showing the state before a fixed rod according to an embodiment of the present invention is slid into the inner side of an insertion mechanism.

[0036] FIG. 11 is a perspective view showing a state in which a fixed rod according to an embodiment of the present invention is slid and inserted into the inner side of an insertion mechanism.

[0037] FIG. 12 is a perspective view showing a state in which a fixing body according to an embodiment of the present invention is inserted into an insertion hole and fixed secondarily.

[0038] Referring to FIGS. 1 to 12, the fixing rod (100) is provided to be inserted into the bone marrow cavity and may include a rod portion (110) and a rod connecting portion (120).

[0039] The rod portion (110) is inserted into the bone marrow cavity and may be formed to extend along the longitudinal direction of the bone. The rod portion (110) may be made of a biocompatible material. The rod portion (110) may be provided to reinforce the internal strength of the bone and to distribute the load on the fracture site.

[0040] The rod coupling portion (120) is provided at the end of the rod portion (110) and can be provided to be coupled with the insertion mechanism (200). To this end, the rod coupling portion (120) may include a sliding body (121), an inclined surface (122), a sliding groove (123), an end groove (124), an insertion hole (125), and a female screw thread (126).

[0041] The sliding body (121) is a part formed at the end of the rod portion (110), and can be formed with a larger diameter than the rod portion (110) and can form the body of the rod coupling portion (120).

[0042] The above inclined surface (122) is formed on the end side of the upper surface of the sliding body (121) and can be provided to have a downward slope toward the end.

[0043] The sliding groove (123) is formed on both sides of the sliding body (121) and can be formed in the shape of a groove having a certain length. The sliding groove (123) can be extended to be parallel to the slope of the inclined surface (122).

[0044] The end groove (124) is formed at the end of the sliding body (121) and can be provided in the shape of a groove into which the stopper (215) of the insertion mechanism (200) can be inserted inwardly. The end groove (124) provided in this way can be provided to engage with the stopper (215) to limit the limit of the rod coupling part (120) being inserted into the insertion coupling part (210) of the insertion mechanism (200).

[0045] The insertion hole (125) is formed in the inclined surface (122) and can be formed as a hole in which the upper and lower parts are connected. The insertion hole (125) can be provided in a shape such that a fixing body (217), which will be described later, can be inserted from the top.

[0046] The above female screw thread (126) is a screw thread formed inside the insertion hole (125) and can be provided in a form that engages with the screw thread formed on the outer surface of the fixing body (217).

[0047] The above insertion mechanism (200) is provided to insert the above fixing rod (200) into the bone marrow cavity and may include an insertion coupling part (210), an operating part (220), and a handle part (230).

[0048] The above insertion coupling part (210) is coupled with the rod coupling part (120) and may include an upper body (211), a lower body (212), a wall (213), a protruding insert (214), a stopper (215), a shaft (216), and a fixing body (217).

[0049] The upper body (211) is an upper structure forming the body of the insertion coupling part (210), and a cavity may be formed on the inside to accommodate the shaft (216).

[0050] The lower body (212) is formed as an extension at the end of the upper body (211) and may be formed with a larger diameter than the upper body (211).

[0051] The above wall (213) may be formed to extend downward from both sides of the lower portion of the lower body (212). That is, the lower portion of the lower body (212) may be formed such that the front, rear, and bottom, which are the directions in which the rod coupling portion (120) is inserted, are open, and only the two sides are blocked by the wall (213).

[0052] The protruding insert (214) is provided on the inner surface of the wall (213) and may be formed to protrude in a direction facing each other. Additionally, the protruding insert (214) may be formed to protrude in a shape and length that allows it to be inserted into the sliding groove (123) and slide.

[0053] Meanwhile, the sliding groove (123) and the protruding insert (214) can be formed in various shapes, such as points, lines, and surfaces, in addition to the shape shown.

[0054] For example, the protruding insert (214) may be provided in a form where only a part of the wall (213) is protruded, or it is also possible to provide it in a form where the entire length of the inner side of the wall (213) is protruded.

[0055] Additionally, the inclined surface (122) may be configured so that when the protruding insert (214) is inserted into the sliding groove (123), the fixing rod (100) is connected in an inclined state such that the inclined surface (122) is parallel to the bottom surface of the lower body (212).

[0056] The inclined surface (122) provided in this manner allows the fixing rod (100) to be inserted more easily into the bone marrow cavity.

[0057] The stopper (215) can be inserted into the inner side of the end groove (124) when the protruding insert (214) is fully inserted into the sliding groove (123), thereby restricting the sliding body (121) from being inserted further. To this end, the stopper (215) is provided at the bottom of the lower body (212) and can be formed to extend downward from the direction opposite to the direction in which the sliding body (121) is inserted.

[0058] At this time, the stopper (215) and the end groove (124) are provided in a point contact manner, but they may also be provided in a linear or planar form. For example, the end groove (124) may be extended in the width direction of the sliding body (121), and the stopper (215) may also be extended to have a certain length corresponding to the shape of the end groove (124).

[0059] The shaft (216) may be formed to extend through the center of the upper body (211) and the lower body (212).

[0060] The fixed body (217) is a structure formed at the lower end of the shaft (216) and can be arranged to be inserted into the insertion hole (125) and fixed by engaging with the female screw thread (126). The fixed body (217) may have a screw thread formed on its outer surface that engages with the female screw thread (126).

[0061] Meanwhile, the above-mentioned fixed body (217) may be provided not only in the form of a screw as depicted, but also to allow for pin connection and clamp connection with the insertion hole (125).

[0062] The shaft (216) may be provided to be coupled with the operating part (220). Specifically, the operating part (220) may be provided on the upper part of the insertion coupling part (210) and connected to the shaft (216) to insert the fixed body (217) into the rod coupling part (120). That is, the operating part (220) is connected to the shaft (216), and the fixed body (217) may be inserted and fixed into the insertion hole (125) by the movement of the operating part (220). For example, as pressure is applied to the operating part (220) to rotate it, the shaft (216) moves downward, and the screw threads of the fixed body (217) engage with the female screw threads (126) of the insertion hole (125), thereby allowing the fixed body (217) to be inserted into the insertion hole (125) and coupled.

[0063] The handle portion (230) may extend in one direction from the insertion coupling portion (210) to form a handle. The insertion mechanism (200) can be easily operated through the handle portion (230), and the fixing rod (100) can be inserted.

[0064] As described above, the fixed rod (100) is slid inward from one side of the insertion mechanism (200) to be coupled in a first manner, and the fixed body (217) provided in the insertion mechanism (200) is inserted into the insertion hole (125) of the fixed rod (100) to be coupled in a second manner, thereby allowing the fixed rod (100) and the insertion mechanism (200) to maintain a stable coupled state.

[0065] More specifically, according to the present invention, the problem of the fixing rod (100) falling due to a weakened connection force can be prevented, and since the connection is intuitive, unnecessary movement during surgery is minimized and operation is convenient. As a result, surgery can be performed more stably, thereby improving the success rate of surgery.

[0066] Although the foregoing description of the present invention has been illustrated with reference to the drawings, it is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form. Furthermore, the described techniques may be performed in a different order than the described method.

[0067] The embodiments described in this specification and the accompanying drawings are merely illustrative of some of the technical ideas included in the present invention. Accordingly, the scope of the present invention is defined by the claims set forth below, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0069] 100: Fixed rod 110: Rod part 120: Rod joint 121: Sliding body 122: Slope 123: Sliding Home 124: End Home 125: Insertion hole 126: Female thread 200: Insertion device 210: Insertion joint 211: Upper body 212: Lower body 213: Wall 214: Protruding insert 215: Stopper 216: Shaft 217: Fixed body 220: Control Unit 230: Handle section

Claims

Claim 1 A combined structure of an intramedullary fixation rod and an insertion mechanism comprising: a fixation rod provided to be inserted into a bone marrow cavity; and an insertion mechanism provided to insert the fixation rod into the bone marrow cavity, wherein the fixation rod is slid inward from one side of the insertion mechanism to be primarily coupled, and a fixation body provided in the insertion mechanism is inserted into the fixation rod to be secondarily coupled. Claim 2 A combined structure of an intramedullary fixation rod and an insertion mechanism according to claim 1, wherein the fixation rod comprises: a rod portion formed extending along the longitudinal direction of the bone and inserted into the bone marrow cavity; and a rod coupling portion provided at the end of the rod portion and provided to be coupled with the insertion mechanism. Claim 3 A combined structure of an intramedullary fixation rod and an insertion mechanism according to claim 2, wherein the insertion mechanism comprises: an insertion coupling part coupled to the rod coupling part and having the fixation body; and an operating part provided on the upper part of the insertion coupling part and provided to insert the fixation body into the rod coupling part. Claim 4 A combined structure of an intramedullary fixation rod and an insertion device according to claim 3, wherein the insertion device further comprises a handle portion provided to extend in one direction from the insertion coupling portion to form a handle. Claim 5 A combined structure of an intramedullary fixation rod and an insertion mechanism, wherein the fixation rod comprises: a sliding body provided at the end of the rod portion; an inclined surface formed on the upper surface of the sliding body and provided to form a downward slope toward the end; sliding grooves formed on both sides of the sliding body; and an insertion hole formed on the inclined surface so as to communicate the upper and lower portions of the sliding body. Claim 6 A combined structure of an intramedullary fixation rod and an insertion mechanism according to claim 5, wherein the insertion coupling part comprises: an upper body forming a body; a lower body extending from the end of the upper body; a pair of walls extending downward from both sides of the lower end of the lower body; and a protruding insert formed protruding from the inner surface of the walls and provided to be insertable into the sliding groove. Claim 7 A combined structure of an intramedullary fixation rod and an insertion mechanism according to claim 6, wherein the fixation rod further comprises an end groove formed at the end of the sliding body, and the insertion coupling portion further comprises a stopper formed at the lower part of the lower body, arranged to be inserted into the inner side of the end groove when the protruding insert is completely inserted into the sliding groove, thereby restricting further insertion of the sliding body. Claim 8 In claim 6, the insertion coupling part further comprises a shaft extending through the center of the upper body and the lower body; and the fixing body formed at the end of the shaft, wherein the fixing body is provided to be inserted into the insertion hole, characterized in that the structure of the combination of an intramedullary fixation rod and an insertion mechanism. Claim 9 A combined structure of an intramedullary fixation rod and an insertion mechanism, characterized in that, in claim 8, the fixation rod further comprises a female screw thread in the form of a screw thread formed inside the insertion hole, and the fixation body has a screw thread formed on its outer surface that engages with the female screw thread, so that the fixation body and the insertion hole are provided to be screw-coupled. Claim 10 A combined structure of an intramedullary fixation rod and an insertion mechanism according to claim 9, wherein the shaft is connected to the operating part, and the fixing body is arranged to be inserted and fixed into the insertion hole by the operating part.

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