Orthopedic adapter

Abstract

An orthopedic adapter of the present invention comprises: a tool coupling part which is detachably coupled to a rotary power tool and receives rotational force from the rotary power tool; a shaft which rotates in conjunction with the rotational direction of the tool coupling part; a first hitting part transfer unit which rotates in conjunction with the shaft only when the shaft rotates in a first direction; a first hitting part which can move rearward by the rotation of the first hitting part transfer unit; a second hitting part transfer unit which rotates in conjunction with the shaft only when the shaft rotates in a second direction; a second hitting part which can move forward by the rotation of the second hitting part transfer unit; a force transmission part which can move rearward by contact with the first hitting part and can move forward by contact with the second hitting part; and a force adjustment part which can adjust the force applied by the second hitting part to the force transmission part by adjusting the acceleration force of the second hitting part moving forward.

Description

Orthopedic adapter

[0001] The present invention relates to an adapter for orthopedics, and more specifically, to an adapter for an impactor used in orthopedic surgery.

[0002] As the global population ages, demand for hip replacement surgery continues to grow. Furthermore, the number of younger patients undergoing hip replacement surgery due to various conditions, such as inflammation, tumors, or strenuous exercise, is also on the rise.

[0003] Hip replacement surgery is a surgical procedure that replaces one or both sides of the joint with an artificial joint when there is an abnormality in the joint or bone connecting the hip bone (acetabulum) and the thigh bone (femur).

[0004] Meanwhile, during these surgical procedures, the process of correctly inserting the stem (femoral stem) into the femur is one of the factors that determines the prognosis of the surgery. Conventionally, to insert the stem into the femur, a broach is first inserted and then removed to create a space, after which the stem is inserted into this space.

[0005] However, as illustrated in Fig. 24, a method was used in which a doctor manually strikes a broach (300) using a tool such as a mallet (M) to insert it into the femur (400) to create a space for stem insertion. However, in this case, the size and direction of the impact applied to the broach (300) are not constant, so an abnormal space is created in the femur. Consequently, there was a problem in that the prognosis of the surgery was poor when the stem was inserted here, resulting in the need for a second surgery.

[0006] To improve these points, the applicant has developed an orthopedic impactor disclosed in Korean Patent No. 2,343,886 (see FIGS. 25 and 26). For reference, FIGS. 25 and 26 correspond to FIGS. 1 and 4 of the Korean Patent held by the applicant, respectively. For the convenience of explanation, the drawing numbers used in the Korean Patent have been used without modification, and it is to be noted that these drawing numbers do not indicate the same components even if they overlap with the drawing numbers used in the description of the present invention described below.

[0007] Such a conventional impactor includes a rotating power tool (200) and an adapter (100) detachably coupled thereto. As illustrated in FIG. 24, the adapter (100) includes a case portion (6), a tool coupling portion (5) that receives rotational force from the rotating power tool, a first rotating portion (7) that rotates in conjunction with the rotation of the tool coupling portion in only one of the rotational directions of the tool coupling portion, a striking portion transport portion (4) that rotates in conjunction with the rotation of the first rotating portion, a striking portion (3) that moves in a first direction while compressing a first spring (2) by the rotation of the striking portion transport portion and then moves in a second direction opposite to the first direction by the restoring force of the first spring, and a force transmission portion (1) that moves in the second direction by contact with the striking portion.

[0008] However, existing adapters, while capable of applying force to the broach for broach insertion, can only be used to strike the broach during insertion, and cannot be used to remove it. Furthermore, existing adapters cannot control the force applied to the broach, which can lead to femoral fracture due to excessive force.

[0009] The present invention is intended to solve the problems described above, and an object of the present invention is to provide an orthopedic adapter that can control the impact force for inserting a surgical tool such as a broach, and can also generate a force for removing the surgical tool as well as the impact force for inserting the surgical tool.

[0010] In order to achieve the above object, an orthopedic adapter according to one embodiment of the present invention is characterized by being detachably coupled to a rotating electric tool, and including a case, a tool coupling part that receives a rotational force from the rotating electric tool, a shaft that rotates in conjunction with the rotational direction of the tool coupling part, a first striking part transport part that rotates in conjunction with the shaft only when the shaft rotates in a first direction, a first striking part that can move backward by the rotation of the first striking part transport part, a second striking part transport part that rotates in conjunction with the shaft only when the shaft rotates in a second direction, a second striking part that can move forward by the rotation of the second striking part transport part, a force transmission part that can move backward by contact with the first striking part and can move forward by contact with the second striking part, and a force control part that can control the force that the second striking part applies to the force transmission part.

[0011] In addition, the force control unit is characterized by including an outer ring that is rotatably mounted on the outside of the case part relative to the case part, an inner ring that is located inside the case part and rotates in conjunction with the rotation of the outer ring, a connecting pin that connects the outer ring and the inner ring to each other, and a second inner case that is fixed to the case part between the outer ring and the inner ring inside the case part; and has a multi-stage pin-catching hole formed to be inclined with respect to the central axis of the shaft, wherein a plurality of engaging grooves are formed through which the connecting pin passes and through which the connecting pin can be selectively caught.

[0012] In addition, the second striking portion transfer unit is characterized by including a second body portion having a second elastic member having one end supported by the inner ring and the other end supported by the second striking portion, a second through hole through which the shaft passes, a plurality of second screw threads, a second screw groove formed between the plurality of second screw threads, and a second longitudinal groove extending in the longitudinal direction.

[0013] In addition, the first impact portion transfer unit is characterized by including a first body portion having a first elastic member having one end supported by a first spring support member fixed to the case and the other end supported by the first impact portion, a first through hole through which the shaft passes, a plurality of first screw thread portions, a first screw groove portion formed between the plurality of first screw thread portions, and a first longitudinal groove portion extending in the longitudinal direction.

[0014] In addition, the shaft has a second shaft ridge and a second shaft groove that are alternately positioned in the circumferential direction, the second body part has a second ratchet part, the second ratchet part has a second hook part, and a second pressing part that applies elastic force in a direction that always presses the second hook part, and the second hook part is characterized in that it can be caught on the second shaft groove part and does not come off from the second shaft groove part when the shaft rotates in the second direction, so that the second body part can rotate in conjunction with the shaft.

[0015] In addition, when the shaft rotates in the first direction, the second hook portion rotates relative to the shaft by overcoming the elastic force of the second pressurizing portion by the rotational force of the shaft, thereby sequentially moving to another adjacent second shaft groove portion, so that the second body portion does not rotate with the rotation of the shaft.

[0016] In addition, the shaft further has a first shaft ridge portion and a second shaft groove portion that are alternately positioned in the circumferential direction, the first body portion has a first ratchet portion, the first ratchet portion has a first hook portion, and a first pressing portion that applies an elastic force in a direction that always presses the first hook portion, and the first hook portion is characterized in that it can be caught on the first shaft groove portion and does not come off from the first shaft groove portion when the shaft rotates in the first direction, so that the first body portion can rotate in conjunction with the shaft.

[0017] In addition, when the shaft rotates in the second direction, the first hook portion rotates relative to the shaft by overcoming the elastic force of the first pressing portion by the rotational force of the shaft, thereby sequentially moving to another neighboring first shaft groove portion, so that the first body portion does not rotate with the rotation of the shaft.

[0018] In addition, the first striking portion includes a first body portion having a first bore formed therein, a first bar penetrating a wall of the first body portion and having one end protruding into the first bore and the other end protruding outward from the first body portion, and a first protrusion connected to one end of the first body portion to form a step with respect to the first body portion, and the first bar is characterized in that two are provided facing each other at 180° intervals in the circumferential direction of the first body portion.

[0019] In addition, one end of the first bar moves along the first screw groove when the first body part rotates, and when one end of the first bar leaves the first screw groove and reaches the first longitudinal groove, the first striking portion moves rearward due to the restoring force of the first elastic member.

[0020] In addition, the second striking portion includes a second body portion having a second bore formed therein, a second bar penetrating a wall of the second body portion and having one end protruding into the second bore and the other end protruding outward from the second body portion, and a second protrusion connected to one end of the second body portion to form a step with respect to the second body portion, and the second bar is characterized in that two are provided facing each other at 180° intervals in the circumferential direction of the second body portion.

[0021] In addition, one end of the second bar moves along the second screw groove when the second body part rotates, and when one end of the second bar leaves the second screw groove and reaches the second longitudinal groove, the second striking part moves forward due to the restoring force of the second elastic member.

[0022] In addition, the case portion is characterized by further including a circumferential through hole through which the connecting pin can move, and a front opening through which the force transmission portion protrudes.

[0023] In addition, the power transmission unit is characterized by including a tool connection unit protruding through the front opening of the case unit, and a frame that is relatively slidable along the shaft.

[0024] In addition, the second inner case is characterized in that it further includes a second slit through which the second bar moves.

[0025] In addition, a first inner case is provided that is fixed to the inside of the case portion and surrounds the first striking portion and the first striking portion transfer portion, and the first inner case is characterized by having a first slit through which the first bar moves.

[0026] An orthopedic adapter according to an embodiment of the present invention having the above-described configuration has the following effects.

[0027] First, the present invention can control the impact force when inserting a surgical tool into a bone by controlling the force applied by the second impact unit to the force transmission unit using a force control unit, thereby improving the problem of existing impactor adapters that may cause bone, for example, femur, damage due to excessive force.

[0028] In addition, since it can generate not only a striking force for inserting a surgical tool such as a brooch but also a force for removing the surgical tool, it can be safely and easily removed with a constant force when removing the surgical tool.

[0029] Meanwhile, the present invention also includes other effects that can be expected from the above-described configuration, although not explicitly described.

[0030] FIG. 1 is a perspective view of an orthopedic adapter according to one embodiment of the present invention.

[0031] Figure 2 is a longitudinal cross-sectional view of the adapter of Figure 1.

[0032] Figure 3 is another longitudinal cross-sectional view of the adapter of Figure 1.

[0033] Fig. 4 shows the case part of the adapter of Fig. 1.

[0034] Figure 5 is a plan view of the adapter of Figure 1 with the outer ring removed.

[0035] Fig. 6 (a) is a perspective view of the second inner case of the adapter of Fig. 1, and Fig. 6 (b) is a perspective view viewed from another direction.

[0036] Fig. 7 shows the first inner case of the adapter of Fig. 1.

[0037] Fig. 8 shows the coupling relationship between the second striking portion and the second body portion in the adapter of Fig. 1.

[0038] Fig. 9 shows the coupling relationship between the first striking portion and the first body portion in the adapter of Fig. 1.

[0039] Fig. 10 is a schematic diagram illustrating how the force control unit operates in the adapter of Fig. 1.

[0040] Figure 11 (a) is a drawing showing a case where the connecting pin is located in the lowest engaging groove in Figure 10, and Figure 11 (b) is a drawing showing a case where the connecting pin is located in the uppermost engaging groove.

[0041] Fig. 12 shows the shaft of the adapter of Fig. 1.

[0042] Fig. 13 (a) is a cross-sectional perspective view of the shaft as viewed in the BB direction of Fig. 12, Fig. 13 (b) shows the joint relationship between the shaft and the second body part as viewed in the EE direction of Fig. 2, and Fig. 13 (c) is an exploded view of the main components of the second body part.

[0043] Fig. 14 (a) is a cross-sectional perspective view of the shaft viewed in the AA direction of Fig. 12, Fig. 14 (b) shows the joint relationship between the shaft and the first body part viewed in the DD direction of Fig. 2, and Fig. 14 (c) is an exploded view of the main components of the first body part.

[0044] Fig. 15 is a schematic diagram showing the coupling relationship of the power transmission unit, the second striking unit, the second striking unit transfer unit, the first striking unit transfer unit, and the first striking unit in the adapter of Fig. 1.

[0045] Figure 16 (a) shows the outer ring, inner ring, and connecting pin of the force control part of the adapter of Figure 1 in a combined state, and Figure 16 (b) shows the disassembled state.

[0046] Fig. 17 (a) is a plan view showing the connecting pin in Fig. 15, and Fig. 17 (b) is a plan view showing the outer ring.

[0047] Figures 18 (a) to (c) are drawings showing the operation of the second striking portion of the adapter of Figure 1.

[0048] Figures 19 (a) to (c) are drawings showing the relative positions of the second bar with respect to the second body part in steps (a) to (c) of Figure 18, respectively.

[0049] Figures 20 (a) to (c) are drawings showing the operation of the first striking portion of the adapter of Figure 1.

[0050] Figures 21 (a) to (c) are drawings showing the relative positions of the first bar with respect to the first body part in steps (a) to (c) of Figure 20, respectively.

[0051] Figure 22 (a) shows the joint relationship between the second inner case and the second striking part, Figure 22 (b) is a rear view thereof, and Figure 22 (c) is a cross-sectional view in the BB direction.

[0052] Fig. 23 (a) shows the joint relationship between the first inner case and the first striking portion, Fig. 23 (b) is a rear view thereof, and Fig. 23 (c) is a cross-sectional view in the FF direction.

[0053] Figure 24 shows a conventional method of manually striking an object with a mallet and inserting it into the femur.

[0054] Figures 25 and 26 illustrate conventional adapters.

[0055] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can practice the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. Furthermore, in the present embodiments, terms such as "first" and "second" do not indicate order, but rather are used to distinguish components having the same name.

[0056] An orthopedic adapter according to one embodiment of the present invention is an adapter that is detachably coupled to a rotary power tool (e.g., handpiece, power tool).

[0057] As shown in FIGS. 1 and 2, the adapter of the present invention includes a case portion (1), a tool coupling portion (2), a shaft (3), a first striking portion transfer portion (7), a first striking portion (5), a second striking portion transfer portion (8), a second striking portion (6), a force transmission portion (4), and a force control portion (9) as main components.

[0058] As shown in FIG. 1, FIG. 4 and FIG. 5, the case part (1) includes a circumferential through hole (12) through which a connecting pin (92) described later can move, and a front opening (13) through which a force transmission part (4) protrudes.

[0059] The tool joint (2) can rotate by receiving the rotational force of a known rotary electric tool (e.g., handpiece) (200) as illustrated in Fig. 23.

[0060] The shaft (3) rotates in conjunction with the rotational direction of the tool coupling portion (2). In addition, as illustrated in FIGS. 12 and 13, the shaft (3) has a second shaft mountain portion (31) and a second shaft valley portion (32) alternately positioned in the circumferential direction, and a first shaft mountain portion (33) and a second shaft valley portion (34) alternately positioned in the circumferential direction.

[0061] As shown in (b) of Fig. 14, the first striking portion transfer portion (7) rotates in conjunction with the shaft (3) only when the shaft (3) rotates in the first direction (R1), for example, counterclockwise.

[0062] The first striking part (5) can move backward (in the downward direction based on Fig. 2, the same applies hereinafter) by rotation of the first striking part transfer part (5).

[0063] As shown in Fig. 9, the first striking portion (5) has a first body portion (52), a first bar (51), and a first protrusion (54).

[0064] The first body part (52) has a first bore (53) extending longitudinally through the first body part (52).

[0065] The first bar (51) penetrates the wall of the first body part (52), one end of which protrudes into the first bore (53) and the other end of which protrudes outward from the first body part (52). Here, for example, two first bars (51) may be provided facing each other at 180° intervals in the circumferential direction of the first body part (52).

[0066] One end of the first bar (51) moves along the first screw groove (723) when the first body part (72) rotates, and when one end of the first bar (51) leaves the first screw groove (723) and reaches the first longitudinal groove (724), the first striking part (5) can move backward by the restoring force of the first elastic member (71).

[0067] In addition, the first protrusion (54) is connected to one end of the first body part (52) to form a step with the first body part (52), and has a bore that is connected to and communicates with the first bore (53).

[0068] As shown in (b) of Fig. 13, the second striking portion transfer portion (8) rotates in conjunction with the shaft (3) only when the shaft (3) rotates in the second direction (R2), for example, clockwise.

[0069] The second striking part (6) can move forward (upward direction based on Fig. 2, the same applies hereinafter) by rotation of the second striking part transport part (8).

[0070] As shown in Fig. 8, the second striking portion (6) has a second body portion (62), a second bar (61), and a second protrusion (64).

[0071] The second body part (62) has a second bore (63) extending longitudinally through the second body part (62).

[0072] The second protrusion (64) is connected to one end of the second body part (62) to form a step with the second body part (62), and has a bore that is connected to and communicates with the second bore (63).

[0073] The second bar (61) penetrates the wall of the second body part (62), one end of which protrudes into the second bore (63) and the other end of which protrudes outward from the second body part (62). Here, for example, two second bars (61) may be provided facing each other at 180° intervals in the circumferential direction of the second body part (62).

[0074] One end of the second bar (61) moves along the second screw groove (823) when the second body part (62) rotates, and when one end of the second bar (61) leaves the second screw groove (8723) and reaches the second longitudinal groove (824), the second striking part (6) can move forward by the restoring force of the second elastic member (81).

[0075] As shown in Fig. 15, the power transmission unit (4) can move backward by contact with the first striking unit (5) and can move forward by contact with the second striking unit (6).

[0076] The power transmission unit (4) has a tool (e.g., broach) connection unit (42) that protrudes through the front opening (13) of the case unit (1) and a frame (41) that can slide relatively along the shaft (3).

[0077] The force control unit (9) can control the acceleration force with which the second striking unit (6) moves forward, thereby controlling the force applied by the second striking unit (6) to the force transmission unit (4). To this end, the force control unit (9) includes an outer ring (91), an inner ring (93), a connecting pin (92), and a second inner case (94), as illustrated in FIGS. 1, 5, 10, and 16.

[0078] The outer ring (91) is mounted on the outside of the case part (1) so as to be rotatable relative to the case part (1).

[0079] The inner ring (93) is located inside the case part (1) and rotates in conjunction with the rotation of the outer ring (91).

[0080] The connecting pin (92) connects the outer ring (91) and the inner ring (93) to each other and fixes them.

[0081] Referring to FIGS. 1, 6, and 10, the second inner case (94) is fixed to the case part (1) between the outer ring (91) and the inner ring (93) inside the case part (1). In addition, the second inner case (94) has a multi-stage pin-catching hole (941), and the multi-stage pin-catching hole (941) has a plurality of catching grooves (9411) through which a connecting pin (92) passes and in which the connecting pin (92) can be selectively caught, and is formed to be inclined with respect to the central axis (C) of the shaft (3). Meanwhile, FIG. 10 shows the main configuration of the force control part (9) with the outer ring removed, and the multi-stage pin-catching hole and the connecting pin may be present on the opposite side of the ground in FIG. 10 as well.

[0082] In addition, the second inner case (94) further has a second slit (942) through which the second bar (61) moves, as illustrated in FIG. 10. And, as illustrated in FIG. 6 and FIG. 22, the second inner case (94) has a second catch (944). The second catch (944) functions as a stopper that can limit the relative movement of the second body portion (62) of the second striking portion (6). For this purpose, the second step portion (943) having a smaller diameter than the remaining portion of the second inner case (94) is provided.

[0083] As shown in Fig. 1 and Fig. 8 (b), the second striking portion transfer portion (8) has a second elastic member (81) and a second body portion (82).

[0084] The second elastic member (81) is supported at one end by the inner ring (93) and at the other end by the second striking portion (6).

[0085] The second body part (82) has a second through hole (821) through which the shaft (3) passes, a plurality of second screw threads (822), a second screw groove (823) formed between the plurality of second screw threads (822), and a second longitudinal groove (824) extending in the longitudinal direction.

[0086] As shown in (a) of FIG. 1 and FIG. 9, the first striking portion transfer portion (7) has a first elastic member (71) and a first body portion (72).

[0087] The first elastic member (71) has one end supported by the first spring support member (11) fixed to the case (1), and the other end supported by the first striking portion (5).

[0088] The first body part (72) has a first through hole (721) through which the shaft (3) passes, a plurality of first screw threads (722), a first screw groove (723) formed between the plurality of first screw threads (722), and a first longitudinal groove (724) extending in the longitudinal direction.

[0089] The second body part (82) has a second ratchet part (825, 826), as illustrated in Fig. 13. For reference, a ratchet refers to a component that restricts the movement of a machine element in only one direction.

[0090] The second ratchet portion (825, 826) has a second hook portion (825) and a second pressure portion (826) that applies elastic force in a direction that always presses the second hook portion (825).

[0091] The second hook portion (825) can be selectively hooked onto the second shaft groove portion (32), and when the shaft (3) rotates in the second direction (R2), for example, clockwise, it does not come off from the second shaft groove portion (32), so that the second body portion (82) can rotate in conjunction with the shaft (3).

[0092] Meanwhile, when the shaft (3) rotates in the first direction (R1), for example, counterclockwise, the second hook portion (825) overcomes the elastic force of the second pressurizing portion (826) by the rotational force of the shaft (3) and sequentially moves to another adjacent second shaft groove portion (32) while rotating, so that the second body portion (82) does not rotate with the rotation of the shaft (3).

[0093] Additionally, the first body part (72) has a first ratchet part (725, 726), as shown in FIG. 14.

[0094] The first ratchet portion (725, 726) has a first hook portion (725) and a first pressure portion (726) that applies elastic force in a direction that always presses the first hook portion (725).

[0095] The first hook portion (725) can be inserted into the first shaft groove portion (34), and when the shaft (3) rotates in the first direction (R1), it does not come off from the first shaft groove portion (34), so that the first body portion (72) can rotate in conjunction with the shaft (3).

[0096] Meanwhile, when the shaft (3) rotates in the second direction (R2), the first hook portion (725) overcomes the elastic force of the first pressure portion (726) by the rotational force of the shaft (3) and sequentially moves to another neighboring first shaft groove portion (34) while rotating, so that the first body portion (72) does not rotate with the rotation of the shaft (3).

[0097] Meanwhile, as illustrated in FIGS. 1 and 7, the first inner case (14) is fixed to the inside of the case portion (1) and surrounds the first striking portion (5) and the first striking portion transfer portion (7). In addition, the first inner case (14) has a first slit (141) through which the first bar (51) moves. And, as illustrated in FIGS. 9 and 23, the first inner case (14) has a first catch (143). The first catch (143) functions as a stopper that can limit the relative movement of the first body portion (52) of the first striking portion (5). For this purpose, the first step portion (142) having a smaller diameter than the remaining portion of the first inner case (14) is provided.

[0098] Additionally, although not specifically stated, various known bearings may be appropriately positioned between components that rotate relative to each other in this embodiment to reduce friction.

[0099]

[0100] Hereinafter, the operation of an adapter for an impactor according to one embodiment of the present invention having the configuration described above will be described. For the convenience of explanation, the rotating power tool is omitted from the illustration. Meanwhile, in this embodiment, in relation to the explanation of the configuration in which the second striking unit transfer unit (8) moves the second striking unit (6) forward by the rotation of the shaft (3) and the configuration in which the first striking unit transfer unit (7) moves the first striking unit (5) backward by the rotation of the shaft (3), in order not to obscure the issue, the configurations that are different from the configuration disclosed in the applicant's Korean Patent No. 2,343,886 will be described in detail, and the description of the same configurations will be omitted or briefly provided.

[0101] First, a process of striking the adapter of the present invention forward to insert a surgical tool, for example, a broach (300), will be described. At this time, for example, the striking can be performed while the user presses the broach (300) with the adapter of the present invention. That is, as illustrated in (a) of FIG. 18, by applying force to the broach (300) with the adapter of the present invention while the force transmission unit (4) is in contact with the broach (300), the force transmission unit (4) may move to the right relative to the case unit (1), so that the frame (41) of the force transmission unit (4) may be in contact with the second step unit (943).

[0102] Figure 18 (a) shows a state in which the rotational power of a rotating electric tool (not shown) is not transmitted to the tool coupling portion (2), i.e., a state in which the rotating electric tool is not in operation. At this time, one end of the second bar (61) of the second striking portion (6) is located in the screw groove portion (823) of the second body portion (82) (see Figure 19 (a)).

[0103] Next, as shown in (b) of FIG. 13 and FIG. 18, when a rotational force in the second direction, for example, clockwise (R2), is applied to the shaft (3) by a rotating power tool, the second body part (82) also rotates in conjunction with the rotation of the shaft (3) by the second ratchet (825, 826). For reference, at this time, the first body part (72) does not rotate in conjunction with the rotation of the shaft (3) due to the first ratchet (725, 726).

[0104] And as the second body part (82) rotates, the second bar (61) of the second striking part (6) moves along the screw part (823) of the second body part (82). As the second striking part (6) moves more and more to the right, more and more elastic energy is accumulated in the second spring (81) (see (b) of Fig. 19).

[0105] Next, as shown in (c) of FIG. 18 and (c) of FIG. 19, when the second bar (61) of the second striking portion (6) leaves the second screw groove (823) of the second striking portion transfer body (82) and reaches the second longitudinal groove (824), the second striking portion (6) moves rapidly forward due to the restoring force of the second spring (81).

[0106] Finally, when the second striking portion (6) strongly strikes the force transmission portion (4), the force transmission portion (4) transmits the striking force of the second striking portion (6) to the object (e.g., broach). For reference, (a) to (c) of FIG. 19 are drawings corresponding to (a) to (c) of FIG. 18, respectively, and schematically show the relative position of the second bar (61) in the second body portion (82) at each stage.

[0107] Here, when the second body part (82) rotates further, the second bar (62) of the second striking part (6) re-enters the second screw part (823) of the second body part (82), and the process described above is repeated.

[0108] Meanwhile, the force applied by the second striking part (6) to the force transmission part (4) can be controlled as follows using the force control part (9).

[0109] Referring to Fig. 10, the initial compression state of the second spring (81) can be adjusted by rotating the outer ring (91).

[0110] Specifically, when the outer ring (91) is rotated in the direction of the arrow (P), the inner ring (93) is also rotated in conjunction with it by the connecting pin (92). At this time, since the multi-stage pin engaging hole (914) is inclined with respect to the central axis (C) of the shaft (3), for example, it is inclined upward (upward in Fig. 10) so as to get closer to the force transmission unit (4), the compression force of the second spring (81) can be adjusted depending on which of the plurality of engaging grooves (9411) the connecting pin (92) is located in. In Fig. 10, four engaging grooves (9411) are formed as an example, and when positioned at the lowest engaging groove (9411-1), the compressive force of the second spring (81) is the smallest (see (a) of Fig. 11), and when positioned at the uppermost engaging groove (9411-2), the compressive force of the second spring (81) is the largest (see (b) of Fig. 11).

[0111] Hereinafter, the action of the adapter of the present invention applying a force backward (based on FIG. 2, downward) to the force transmission unit (4) to remove a broach inserted into, for example, a femur will be described. For reference, the broach is directly connected to the force transmission unit (4) or indirectly through a fastening means (not shown). For example, a user may perform a backward strike while pulling the broach (300) to the right (based on FIG. 20) with the adapter of the present invention. At this time, as illustrated in (a) of FIG. 20, the frame (41) of the force transmission unit (4) may move relatively to the left with respect to the case unit (1) so that the frame (41) of the force transmission unit (4) may be in contact with the first step portion (142).

[0112] Figure 20 (a) shows a state in which the rotational power of the rotating electric tool is not transmitted to the tool coupling portion (2), i.e., a state in which the rotating electric tool is not in operation. At this time, one end of the first bar (51) of the first striking portion (5) is located at the first screw groove portion (723) of the first body portion (72) (see Figure 21 (a)).

[0113] Next, as shown in (b) of FIG. 14 and FIG. 20, when a rotational force in the first direction, for example, the counterclockwise direction (R1), is applied to the shaft (3) by the tool coupling part (2), the first body part (72) also rotates in conjunction with the rotation of the shaft (3) by the first ratchet (725, 726). For reference, at this time, the second body part (82) does not rotate in conjunction with the rotation of the shaft (3) due to the second ratchet (825, 826).

[0114] And as the first body part (72) rotates, the first bar (51) of the first striking part (5) moves along the first screw groove (723) of the first body part (72). As the first striking part (5) moves more and more to the left (based on Fig. 20), more and more elastic energy is accumulated in the first spring (71) (see Fig. 20 (b) and Fig. 21 (b)).

[0115] Next, as shown in (c) of FIG. 20, when the first bar (51) of the first striking portion (5) leaves the first screw groove (723) of the first body portion (72) and reaches the first longitudinal groove (724), the first striking portion (6) moves rapidly backward (to the right as shown in FIG. 20) due to the restoring force of the first spring (71).

[0116] Finally, when the first striking portion (5) strongly strikes the force transmission portion (4), i.e., the frame (41) of the force transmission portion, the force transmission portion (4) applies a force in the direction of removing the object (e.g., broach). For reference, (a) to (c) of FIG. 21 are drawings corresponding to (a) to (c) of FIG. 20, respectively, and schematically show the relative position of the first bar (51) in the first body portion (72) at each stage.

[0117] Here, when the first body part (72) rotates further, the first bar (51) of the first striking part (5) re-enters the first screw part (723) of the first body part (72), and the process described above is repeated.

[0118] Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

[0119] An orthopedic adapter according to one embodiment of the present invention can be used in orthopedic surgery.

Claims

1. In an orthopedic adapter that can be detachably connected to a rotating power tool, Case department, A tool coupling part that receives rotational power from the above-mentioned rotating power tool, A shaft that rotates in conjunction with the rotational direction of the above tool joint, A first striking portion transfer unit that rotates in conjunction with the shaft only when the shaft rotates in the first direction; A first striking unit that can move backward by rotation of the first striking unit transfer unit, A second striking member transporting member that rotates in conjunction with the shaft only when the shaft rotates in the second direction; A second striking unit that can move forward by rotation of the second striking unit transfer unit, A force transmission unit that can move backward by contact with the first striking unit and can move forward by contact with the second striking unit, and A force control unit that can control the force applied by the second striking unit to the force transmission unit. Orthopedic adapter including.

2. In paragraph 1, The above power control unit, An outer ring mounted on the outside of the case portion so as to be rotatable relative to the case portion, An inner ring located inside the case and rotating in conjunction with the rotation of the outer ring, A connecting pin connecting the outer ring and the inner ring, and A second inner case is fixed to the case between the outer ring and the inner ring inside the case; has a plurality of engaging grooves formed so that the connecting pin passes through and the connecting pin can be selectively engaged, and has a multi-stage pin engaging hole formed at an angle to the central axis of the shaft. Orthopedic adapter including:

3. In paragraph 2, The above second striking unit transfer unit is, A second elastic member having one end supported by the inner ring and the other end supported by the second striking portion, and A second body part having a second through hole through which the shaft passes, a plurality of second screw threads, a second screw groove formed between the plurality of second screw threads, and a second longitudinal groove extending in the longitudinal direction. Orthopedic adapter including:

4. In paragraph 1, The above first striking unit transfer unit is, A first elastic member, one end of which is supported by a first spring support member fixed to the case, and the other end of which is supported by the first impact portion, and A first body part having a first through hole through which the shaft passes, a plurality of first screw threads, a first screw groove formed between the plurality of first screw threads, and a first longitudinal groove extending in the longitudinal direction. Orthopedic adapter including:

5. In paragraph 3, The above shaft has a second shaft mountain portion and a second shaft bone portion that are alternately positioned in the circumferential direction, The above second body part has a second ratchet part, The second ratchet portion has a second hook portion and a second pressing portion that applies elastic force in a direction that constantly presses the second hook portion, The second hook portion can be hooked onto the second shaft bone portion, and when the shaft rotates in the second direction, it does not detach from the second shaft bone portion, so that the second body portion can rotate in conjunction with the shaft. Orthopedic adapter.

6. In paragraph 5, When the shaft rotates in the first direction, the second hook portion rotates relative to the shaft by overcoming the elastic force of the second pressurizing portion by the rotational force of the shaft, thereby sequentially moving to another adjacent second shaft groove portion, so that the second body portion does not rotate with the rotation of the shaft. Orthopedic adapter.

7. In paragraph 4, The above shaft further comprises a first shaft mountain portion and a second shaft bone portion which are alternately positioned in the circumferential direction, The above first body part has a first ratchet part, The first ratchet portion has a first hook portion and a first pressing portion that applies elastic force in a direction that always presses the first hook portion, The first hook portion can be hooked onto the first shaft bone portion, and when the shaft rotates in the first direction, it does not detach from the first shaft bone portion, so that the first body portion can rotate in conjunction with the shaft. Orthopedic adapter.

8. In paragraph 7, When the shaft rotates in the second direction, the first hook portion rotates relative to the shaft by overcoming the elastic force of the first pressing portion by the rotational force of the shaft, and sequentially moves to another neighboring first shaft groove portion, so that the first body portion does not rotate with the rotation of the shaft. Orthopedic adapter.

9. In paragraph 4, The above first striking part A first body part in which a first bore is formed, A first bar having one end protruding into the first bore and the other end protruding outside the first body part by penetrating the wall of the first body part, and A first protrusion connected to one end of the first body part and forming a step with the first body part Includes, The above first bar is provided with two facing each other at 180° intervals in the circumferential direction of the above first body part. Orthopedic adapter.

10. In paragraph 9, One end of the first bar moves along the first screw groove when the first body part rotates, and when one end of the first bar leaves the first screw groove and reaches the first longitudinal groove, the first striking portion moves backward by the restoring force of the first elastic member. Orthopedic adapter.

11. In paragraph 3, The above second striking part A second body part in which a second bore is formed, A second bar having one end protruding into the second bore and the other end protruding outside the second body part by penetrating the wall of the second body part, and A second protrusion connected to one end of the second body part and forming a step with the second body part Includes, The above second bar is provided in two pieces facing each other at 180° intervals in the circumferential direction of the second body part. Orthopedic adapter.

12. In paragraph 11, One end of the second bar moves along the second screw groove when the second body part rotates, and when one end of the second bar leaves the second screw groove and reaches the second longitudinal groove, the second striking part moves forward by the restoring force of the second elastic member. Orthopedic adapter.

13. In paragraph 2, The above case part A circumferential through hole through which the above connecting pin can move, and Front opening through which the above power transmission part protrudes Orthopedic adapters including:

14. In paragraph 13, The above power transmission part A tool connection part protruding through the front opening of the above case part, and A frame that can slide relatively along the above shaft Orthopedic adapter including:

15. In paragraph 11, An orthopedic adapter wherein the second inner case further comprises a second slit through which the second bar moves.

16. In paragraph 9, A first inner case is provided that is fixed to the inside of the case portion and surrounds the first striking portion and the first striking portion transfer portion, An orthopedic adapter in which the first inner case has a first slit through which the first bar moves.

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