Intramedullary nail aiming device

Abstract

The present invention relates to an intramedullary nail aiming device, comprising a handle; a connecting sleeve rotatably connected to the handle; a clutch member movably mounted relative to the handle, the clutch member being movable relative to the handle between a first position and a second position, wherein in the first position, the clutch member is engaged with the connecting sleeve, and the handle is fixed circumferentially relative to the connecting sleeve, and in the second position, the clutch member is disengaged from the connecting sleeve, and the handle is rotatable circumferentially around the connecting sleeve. The above intramedullary nail aiming device enables a doctor to perform aiming operations in a rotational manner during surgery, eliminating the cumbersome work of instrument disassembly and matching, and greatly optimizing the surgical procedure.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an intramedullary nail aiming device. Background Art

[0002] Current interlocking intramedullary nail products include a main nail axially inserted into the medullary cavity along the axis of the medullary cavity and a plurality of locking nails perpendicular to the main nail or passing through the main nail at other angles. As Figure 1 shown, the vertical one is the main nail and the horizontally arranged ones are the locking nails. Through the interlocking of multiple locking nails, especially the three-dimensional interlocking method of multiple locking nails in different planes, the anti-rotation function of the main nail can be greatly enhanced, and the indication of the main nail can be greatly expanded. However, the intramedullary nail surgery is performed in an interventional surgery method of making a small incision at one end of the medullary cavity and inserting it into the medullary cavity. After the main nail is inserted into the medullary cavity, the position of the locking nail holes cannot be observed with the naked eye. And since multiple locking nail holes are distributed at different angles at the end of the main nail, different auxiliary means are required during the operation to aim at the locking nail holes on the main nail inserted into the medullary cavity to ensure that the locking nails are accurately inserted into the locking nail holes.

[0003] Currently common aiming methods are mechanical aiming and fluoroscopic aiming. Mechanical aiming is generally connected to the handle through a tightening bolt, and then the handle is connected to the aiming bracket through a series of conversion brackets. The bracket is tightly connected by the mechanical locking method of the positioning ejector rod and the lateral threaded pull rod to ensure the stability and accuracy of aiming. Fluoroscopic aiming is carried out by using a mechanical aiming bracket as an auxiliary, cooperating with X-ray fluoroscopy for aiming, or directly aiming by X-ray transmission.

[0004] When performing mechanical aiming, in order to meet different angle requirements, the method of converting the angle needs to be adopted for aiming. As Figure 2 shown, an intramedullary nail aiming device of a traditional technology includes a handle, a connecting sleeve connected to the handle, and a tightening bolt. It is positioned with the connecting sleeve in cooperation with the main nail, and the tightening bolt passes through the connecting sleeve and is threadedly connected to the main nail to tighten the main nail. This aiming device aims at one side direction with the handle. Specifically, it aims at the locking nail hole from the horizontal direction with the handle, as Figure 2 shown by the arrow X in; when aiming at other directions, a conversion bracket needs to be connected to the handle to convert the aiming direction by 90°, so as to be able to aim at the locking nail hole along the vertical direction, as Figure 2in the direction indicated by arrow Z, and the structures for achieving the remaining aiming angles are arranged on the aiming bracket connected to the conversion bracket. Moreover, in order to ensure the accuracy and stability of aiming, the components of the instrument need to be connected in a precise positioning and fastening manner. Therefore, both the conversion bracket and the aiming bracket need to be provided with hanging nuts for fastening, and the handle, the conversion bracket, and the aiming bracket also need to be provided with positioning pins for positioning respectively, resulting in a very large number of sub-components for each component, which is very inconvenient for processing and use; and since multiple instruments are connected, in order to ensure that there is no deformation during use, the handle and the conversion bracket need to be designed with increased width and thickness. The heavy handle and conversion bracket, combined with each aiming bracket, make the entire set of aiming instruments very cumbersome and heavy when in use. Generally speaking, the above-mentioned aiming instrument is cumbersome to use, and when it is necessary to adjust the aiming, disassembly and assembly are required, which affects the aiming efficiency. Summary of the Invention

[0005] Based on this, in view of the problem that the traditional intramedullary nail aiming instrument is cumbersome to use and affects the aiming efficiency, it is necessary to provide an intramedullary nail aimer.

[0006] An intramedullary nail aimer, comprising a handle; a connecting sleeve rotatably connected to the handle; a clutch member movably mounted relative to the handle, the clutch member being movable relative to the handle between a first position and a second position, wherein in the first position, the clutch member is engaged with the connecting sleeve, and the handle is fixed circumferentially relative to the connecting sleeve, and in the second position, the clutch member is disengaged from the connecting sleeve, and the handle is rotatable circumferentially around the connecting sleeve.

[0007] For the above-mentioned intramedullary nail aimer, during the operation, when it is necessary to use the aiming bracket to aim at the hole position on the main intramedullary nail, the clutch member is in the first position. At this time, the handle cannot rotate, and at this time, the aiming bracket can be used to aim at the hole position on the main intramedullary nail. When it is necessary to use the aiming bracket to aim at the hole positions at other angles, the clutch member is switched to the second position, then the handle is rotated by a certain angle, and then the clutch member is switched to the first position to lock the handle. By the above means, the rotation of the handle relative to the main intramedullary nail is realized, and further the rotation of the aiming bracket relative to the main intramedullary nail is realized, so that the aiming bracket can be used to aim at the hole positions at other angles. The above-mentioned intramedullary nail aimer enables the doctor to perform the aiming operation by rotating during the operation, eliminating the cumbersome work of disassembling and matching the instruments, and greatly optimizing the operation process.

[0008] In one embodiment, a reset member is further included, and the reset member is disposed between the clutch member and the handle, and the reset member is configured to provide a reset force for moving the clutch member from the second position to the first position.

[0009] In one embodiment, the movement direction of the clutch member is along the axial direction of the connecting sleeve, and the direction of the reset force is along the axial direction of the connecting sleeve.

[0010] In one of the embodiments, a groove is formed on the handle, the reset member is disposed in the groove, and the clutch member is installed in the groove and partially exposed to the outside of the handle.

[0011] In one embodiment, the handle is provided with a connecting hole, and the connecting sleeve has a first end and a second end opposite to each other along its axial direction, and the first end can be relatively rotatably inserted into the connecting hole.

[0012] In one embodiment, the connecting sleeve is further provided with a limiting portion, the limiting portion is provided with a limiting groove extending along the axial direction of the connecting sleeve, and a plurality of limiting grooves are arranged along the circumference of the connecting sleeve, and the clutch member has a locking member, wherein when the clutch member is in the first position, the locking member enters the limiting groove, and when the clutch member is in the second position, the locking member is located outside the limiting groove.

[0013] In one embodiment, along the axial direction of the connecting sleeve, the end of the limiting groove away from the handle is closed, and when the clutch is in the first position, the locking member abuts against the end of the limiting groove away from the handle.

[0014] In one of the embodiments, a limiting boss is further provided on the first end; the handle is further provided with a step hole and a special-shaped hole, the step hole is located on the side of the second end of the connecting hole away from the connecting sleeve, the special-shaped hole is radially connected to the connecting hole, the special-shaped hole is axially connected to the step hole, and the special-shaped hole is configured to allow the limiting boss to pass along a predetermined path; a positioning hole is also provided on the side of the handle away from the second end of the connecting sleeve, the positioning hole is axially connected to the step hole; the limiting boss at the first end extends into the step hole; the intramedullary nail aimer also includes a positioning pin inserted into the positioning hole, the positioning pin corresponds to the circumferential position of the special-shaped hole, and the positioning pin is located on the rotation trajectory of the limiting boss.

[0015] In one embodiment, the interior of the connecting sleeve has a through hole that penetrates the connecting sleeve along its axial direction, and the intramedullary nail aimer also includes a tightening bolt, which is inserted into the through hole. The tightening bolt includes a head and a bolt portion, the head abuts against the first end of the connecting sleeve, and part of the bolt portion extends out of the second end of the connecting sleeve.

[0016] In one embodiment, the first end is cylindrical, and a plurality of position sensing grooves are circumferentially and uniformly arranged on the outer surface of the first end of the connecting sleeve; an installation hole is formed in the handle, and the intramedullary nail aiming device further includes an indicating component installed in the installation hole. The indicating component includes a positioning member, an elastic member, and a holding member. The elastic member is located between the holding member and the positioning member, and the elastic member is configured to provide an elastic force that enables the positioning member to cooperate with the position sensing groove.

[0017] In one embodiment, the installation hole communicates with the connecting hole and the outside in the radial direction. The holding member is embedded in the installation hole. The holding member is provided with an inner cavity with one end open and the other end closed. The positioning member is placed in the inner cavity and partially exposed outside the inner cavity. The elastic member is placed between the positioning member and the bottom wall of the inner cavity.

[0018] In one embodiment, the installation hole is a threaded hole, and the holding member has an external thread that is threadedly connected to the threaded hole.

[0019] In one embodiment, the handle includes an arc-shaped main body. One end of the arc-shaped main body is provided with a positioning portion, and the other end is connected to the connecting sleeve.

[0020] In one embodiment, a pin hole is formed on the end surface of the positioning portion. A threaded hole axially communicating with the pin hole is provided at the bottom of the pin hole. A positioning groove extending along the axial direction of the pin hole is provided on the inner wall of the pin hole.

[0021] There is also provided an intramedullary nail aiming device, including a handle; a connecting sleeve rotatably connected to the handle; a locking mechanism provided on the handle, including a locking member and an unlocking member, wherein the unlocking member is used to drive the locking member to move to selectively connect or disconnect from the connecting sleeve.

[0022] In one embodiment, the locking member and the unlocking member are an integral part, and the unlocking member is movably installed on the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional interlocking method of the locking nail during intramedullary nail surgery.

[0024] Figure 2 It is an exploded view of a traditional intramedullary nail aiming instrument.

[0025] Figure 3 It is a schematic cross-sectional view of the intramedullary nail aiming device according to an embodiment of the present invention.

[0026] Figure 4 It is an exploded view of the intramedullary nail aiming device according to an embodiment of the present invention.

[0027] Figure 5 The Figure 4 right view of the handle in

[0028] Figure 6 is Figure 5 the sectional view taken along the A-A direction in

[0029] Figure 7 is Figure 4 the schematic diagram of the clutch part in

[0030] Figure 8 is Figure 7 the right view of the clutch part shown in

[0031] Figure 9 is Figure 4 the schematic diagram of the connecting sleeve in

[0032] Figure 10 is Figure 9 the right view of the connecting sleeve shown in

[0033] Figure 11 is Figure 9 the sectional view taken along the B-B direction in

[0034] Figure 12 is Figure 4 the schematic diagram of the indicating component in

[0035] Figure 13 is Figure 12 the sectional view of the indicating component shown in

[0036] The corresponding numbers of the relevant components in the figure are as follows:

[0037] 1. Handle; 2. Connecting sleeve; 3. Hoisting bolt; 4. Conversion bracket; 5. Aiming bracket; 6. Hoisting nut; 7. Positioning pin; 100. Intramedullary nail aimer; 10. Handle; 110. Arc-shaped main body; 120. Positioning part; 121. Pin hole; 122. Threaded hole; 123. Positioning groove; 130. Connecting part; 131. Connecting hole; 132. Groove; 1321. Convex column; 133. Step hole; 134. Special-shaped hole; 135. Positioning hole; 136. Mounting hole; 20. Connecting sleeve; 210. First end; 211. Limiting boss; 212. Position sensing groove; 220. Second end; 221. Convex part; 230. Through hole; 240. Limiting part; 241. Limiting groove; 30. Hoisting bolt; 310. Head; 320. Bolt part; 40. Locking mechanism; 410. Clutch part; 411. Locking piece; 4111. Blind hole; 412. Unlocking piece; 420. Reset piece; 50. Positioning pin; 60. Indicating component; 610. Holding piece; 611. Inner cavity; 612. External thread; 620. Positioning piece; 630. Elastic piece. Detailed implementation mode

[0038] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following provides a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. Among them, "axial" refers to the direction along the axis of the shaft-like element or hole, "radial" refers to the direction along the axis of the shaft-like element or hole, and "circumferential" refers to the circumferential direction around the axis of the shaft-like element or hole.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0044] An embodiment of the present invention provides an intramedullary nail aiming device 100, which combines Figure 3 and Figure 4 As shown, it includes a handle 10, a connecting sleeve 20, a tightening bolt 30 and a locking mechanism 40. One end of the connecting sleeve 20 is rotatably connected to the handle 10, and the other end of the connecting sleeve 20 is used for cooperating and positioning with the end of the main intramedullary nail (not shown); the tightening bolt 30 passes through the connecting sleeve 20 and is threadedly connected to the main intramedullary nail to tighten the main intramedullary nail; the locking mechanism 40 is used to limit the relative rotation between the handle 10 and the connecting sleeve 20.

[0045] As Figure 4 shown, in one embodiment, the handle 10 includes an arc-shaped main body 110, and the opposite ends of the arc-shaped main body 110 are respectively used for connecting with an aiming bracket (not shown) and the connecting sleeve 20. Taking Figure 3 the shown angle as an example, the upper end of the arc-shaped main body 110 is defined as a positioning portion 120, and the lower end is defined as a connecting portion 130.

[0046] Combined with Figure 3 and Figure 4 shown, after the intramedullary nail aiming device 100 is assembled, the connecting sleeve 20 and the tightening bolt 30 are respectively connected to the handle 10 from both sides of the handle 10. After the aiming bracket is connected to the positioning portion 120, the aiming bracket and the connecting sleeve 20 are located on the same side of the handle 10 so as to aim at the locking nail for interlocking.

[0047] The aiming accuracy of the intramedullary nail instrument is a very important technical parameter, so the design of the cooperation structure between each aiming instrument is also very important. As Figure 3As shown, in this embodiment, a pin hole 121 is provided on the end face of the positioning portion 120. The axial direction of the pin hole 121 is consistent with the axial direction of the connecting sleeve 20. A threaded hole 122 axially communicating with the pin hole 121 is provided at the bottom of the pin hole 121, and a positioning groove 123 extending along the axial direction of the pin hole 121 is provided on the inner wall of the pin hole 121. When the positioning portion 120 is connected to the aiming bracket, the aiming bracket is firmly fixed through the threaded connection of the threaded hole 122 and the aiming bracket, the aiming bracket is centered through the pin hole 121, and the aiming bracket is rotationally positioned through the positioning groove 123. Thus, a triple-functional hole is provided on the positioning portion 120, integrating the functions of firm fixation and precise positioning at one position. The structure of the docking portion of the aiming bracket is set to be able to cooperate with the above-mentioned pin hole 121, threaded hole 122, and positioning groove 123.

[0048] In other embodiments, high-precision threaded holes 122 can also be used to achieve the purpose of fixation and precise positioning. It can also be that ordinary-precision threaded holes 122 are used to achieve the fixation function, and at the same time, other positioning structures are added to achieve centering and rotational positioning.

[0049] The connecting sleeve 20 is used to connect the handle 10 and to cooperate with and position the end of the intramedullary nail main nail (not shown). In one embodiment, in combination with Figures 9 to 11 As shown, the connecting sleeve 20 is a longitudinally extending cylindrical element along its axis, having opposite first end 210 and second end 220 along its axis. A through hole 230 passing through the connecting sleeve 20 along its axis is provided inside the connecting sleeve 20. The first end 210 is specifically set to be cylindrical and is matched with the circular connecting hole 131 provided on the handle 10 to achieve the function of relative rotation between the handle 10 and the connecting sleeve 20. As Figure 9 As shown, an arc-shaped convex portion 221 is provided at the second end 220 of the connecting sleeve 20 for cooperating with the adapter structure on the intramedullary nail main nail. It can be understood that the second end 220 of the connecting sleeve 20 is not limited to being provided with the above-mentioned arc-shaped convex portion 221.

[0050] During the operation, the arc-shaped convex portion 221 at the second end 220 of the connecting sleeve 20 cooperates with the intramedullary nail main nail to achieve precise positioning. The tightening bolt 30 passes through the inside of the connecting sleeve 20 and is threadedly connected to the intramedullary nail main nail to tighten the intramedullary nail main nail. The tightening bolt 30 includes a head 310 and a bolt portion 320. The head 310 abuts against the first end 210 of the connecting sleeve 20, and a part of the bolt portion 320 extends out of the second end 220 of the connecting sleeve 20. The bolt portion 320 is used for threaded connection with the intramedullary nail main nail. The tightening bolt 30, the connecting sleeve 20, and the intramedullary nail main nail form a mutually fastened whole.

[0051] During the use of the above intramedullary nail aiming device 100, the aiming bracket is used to aim at the hole positions on the main nail of the intramedullary nail. As is well known to those skilled in the art, multiple hole positions are set on the main nail of the intramedullary nail at different angles, and it is necessary to be able to aim at different hole positions.

[0052] To solve the above problems, in the embodiments of the present invention, each hole position on the main nail of the intramedullary nail is aimed by rotating the aiming bracket, so that there is no need to change the bracket, greatly simplifying the surgical instruments, reducing the surgical difficulty, reducing the overall surgical time, and improving the surgical efficiency. Moreover, since there is no need to change the bracket, the total weight of the aiming bracket is reduced, which is convenient for doctors to use. Since the aiming bracket is connected to the handle 10, in the embodiments of the present invention, the handle 10 is arranged to be rotatable in the circumferential direction relative to the connecting sleeve 20, and the position of the aiming bracket is changed by rotating the handle 10 to be able to aim at different hole positions. Here, the circumferential direction refers to the circumferential direction around the axis of the connecting sleeve 20.

[0053] Specifically, during implementation, as Figure 3 shown, the connecting sleeve 20 is rotatably connected to the lower end of the handle 10. The locking mechanism 40 is specifically a clutch member 410, which is relatively movably installed on the handle 10, and the clutch member 410 is used to limit the relative rotation between the connecting sleeve 20 and the handle 10. Specifically, the clutch member 410 can move between a first position and a second position relative to the handle 10. In the first position, the clutch member 410 is combined with the connecting sleeve 20, and the handle 10 is fixed in the circumferential direction relative to the connecting sleeve 20, that is, the connecting sleeve 20 cannot rotate relative to the handle 10. The first position of the clutch member 410 is the position as Figure 3 shown. When the clutch member 410 moves to the left, the clutch member 410 will move to the second position and separate from the connecting sleeve 20, thereby releasing the restriction on the connecting sleeve 20, and the handle 10 can rotate circumferentially around the connecting sleeve 20.

[0054] Specifically, when the clutch member 410 is in the first position, the clutch member 410 establishes a new connection structure between the handle 10 and the connecting sleeve 20. At this time, the handle 10 and the connecting sleeve 20 can be regarded as a rigid body, and the two can only move together but cannot rotate relative to each other. When the clutch member 410 is switched to the second position, the above new connection structure disappears, the above rigid body state disappears, and the handle 10 and the connecting sleeve 20 can rotate relative to each other.

[0055] As Figure 7 and Figure 8As shown, the clutch member 410 includes a locking member 411 and an unlocking member 412. The locking member 411 is used to connect with the connecting sleeve 20, and the unlocking member 412 can be operated to drive the locking member 411 to move, so that the locking member 411 selectively connects or disconnects from the connecting sleeve 20. In this embodiment, the locking member 411 and the unlocking member 412 are an integral part. The unlocking member 412 is movably installed on the handle 10, and the locking member 411 and the unlocking member 412 move synchronously. In another embodiment, the locking member 411 and the unlocking member 412 can also be configured to be relatively movable within a certain range. In yet another embodiment, the locking member 411 and the unlocking member 412 are separate and are respectively assembled to the handle 10, and the unlocking member 412 can drive the locking member 411 to move when it moves.

[0056] During the operation, when it is necessary to use the aiming bracket to aim at the hole position on the intramedullary nail main nail, the clutch member 410 is in the first position. At this time, the handle 10 cannot rotate, and the aiming bracket can be used to aim at the hole position on the intramedullary nail main nail. When it is necessary to use the aiming bracket to aim at the hole positions at other angles, the clutch member 410 is switched to the second position, and then the handle 10 is rotated by a certain angle, and then the handle 10 is locked by the clutch member 410. By the above means, the rotation of the handle 10 relative to the intramedullary nail main nail is realized, and then the rotation of the aiming bracket relative to the intramedullary nail main nail is realized, so that the aiming bracket can be used to aim at the hole positions at other angles.

[0057] The intramedullary nail aiming device 100 of the above embodiment enables the doctor to perform the aiming operation by rotating during the operation, eliminating the complicated work of disassembling and matching the instruments, and greatly optimizing the operation process.

[0058] On the basis of the above embodiment, as Figure 3 shown, the intramedullary nail aiming device 100 further includes a reset member 420. The reset member 420 is arranged between the clutch member 410 and the handle 10, and the reset member 420 is configured to provide a reset force for moving the clutch member 410 from the second position to the first position. That is to say, after the intramedullary nail aiming device 100 is assembled, in the normal state, the clutch member 410 is in the first position, and the handle 10 and the connecting sleeve 20 cannot rotate relative to each other. When the clutch member 410 is operated to switch to the second position, the handle 10 and the connecting sleeve 20 can rotate relative to each other. The type of the reset member 420 is not limited. Preferably, the reset member 420 is a spring, a torsion spring, or a shape memory alloy member.

[0059] In one embodiment, the clutch member 410 is set to be operated by pressing to conform to the doctor's operation habit. Refer to Figure 3, the reset member 420 is disposed on the left side of the clutch member 410, and the direction of the reset force provided by the reset member 420 is along the axial direction of the connecting sleeve 20 to the right; the clutch member 410 reciprocates in the axial direction of the connecting sleeve 20. When the handle 10 needs to be rotated, the handle 10 can be held and then the clutch member 410 can be pressed. This operation method conforms to the doctor's habit and can improve the surgical efficiency. In other embodiments, the clutch member 410 can also be arranged to be slidable relative to the handle 10 along the radial direction of the connecting sleeve 20.

[0060] Combined with Figure 3 , Figure 5 and Figure 6 As shown, in a specific embodiment, a groove 132 is formed on the right surface of the handle 10, the reset member 420 is disposed in the groove 132, and the clutch member 410 is installed in the groove 132 and partially exposed outside the handle 10 for pressing operation. The reset member 420 is specifically a spring. Wherein, two convex columns 1321 are provided on the bottom wall of the groove 132, and a spring is sleeved on each convex column 1321. Two blind holes 4111 for accommodating the springs are formed on the side of the clutch member 410 opposite to the handle 10. Of course, the number of springs is not limited to two. The method of positioning the spring in the groove 132 is not limited to using the convex columns 1321. For example, circular holes can be formed on the bottom wall of the groove 132 to limit the spring. The surface of the side of the clutch member 410 opposite to the handle 10 is set to be arc-shaped to provide a better pressing feel.

[0061] The clutch member 410 can cooperate with the connecting sleeve 20. Combined with Figure 4 and Figure 9 As shown, in an embodiment, a limiting portion 240 is further provided between the first end 210 and the second end 220 of the connecting sleeve 20. The limiting portion 240 is provided with a limiting groove 241 extending along the axial direction of the connecting sleeve 20. When the clutch member 410 is in the first position, the locking member 411 enters the limiting groove 241 to limit the relative rotation of the handle 10 and the connecting sleeve 20; when the clutch member 410 is in the second position, the locking member 411 is located outside the limiting groove 241 to release the above limitation. A plurality of limiting grooves 241 are provided in the circumferential direction of the connecting sleeve 20. The plurality of limiting grooves 241 can be evenly distributed in the circumferential direction of the connecting sleeve 20, or can be determined according to the angle of the locking pin to be inserted. In this way, the handle 10 can be rotated and adjusted between multiple positions relative to the connecting sleeve 20.

[0062] The shape of the limiting portion 240 and the shape of the limiting groove 241 are not limited. In a specific embodiment, combined with Figure 9 and Figure 10As shown, the limiting portion 240 has a regular outer shape, and the profile of the cross-section in the radial direction of the connecting sleeve 20 includes alternately arranged arc segments and straight segments; the limiting groove 241 is specifically a semi-circular groove. In other embodiments, the cross-section of the limiting portion 240 may be circular, and the limiting groove 241 may be a square groove.

[0063] Further, on the basis of the above embodiments, the limiting groove 241 is further used for axially limiting the clutch member 410, so that the clutch member 410 can only reciprocate within the range of the groove 132. Specifically, as Figure 4 shown, along the axial direction of the connecting sleeve 20, the end of the limiting groove 241 away from the handle 10 is closed; as Figure 3 shown, when the clutch member 410 is in the first position, the locking member 411 abuts against the end of the limiting groove 241 away from the handle 10. By the above means, the clutch member 410 is axially limited by the connecting sleeve 20, and it is only necessary to provide the groove 132 on the handle 10, and there is no need to provide a structure for axially limiting the clutch member 410 on the handle 10. Moreover, since the locking member 411 is held in the limiting groove 241 by the restoring force provided by the restoring member 420, and the locking member 411 abuts against the end of the limiting groove 241 away from the handle 10, it means that the restoring member 420 provides a relatively large restoring force, so that the locking member 411 enters a deeper position in the limiting groove 241, thereby effectively preventing the locking member 411 from accidentally disengaging from the limiting groove 241.

[0064] During the use of the intramedullary nail aiming device 100, it is necessary to ensure positioning in both the circumferential and axial directions. Among them, the connecting sleeve 20 and the handle 10 can rotate relative to each other, and the handle 10 and the connecting sleeve 20 are locked by the clutch member 410 to achieve circumferential positioning. In order to realize the axial limiting function when the handle 10 rotates, the embodiments of the present invention are further improved.

[0065] Combined with Figure 4 and Figure 9 shown, a limiting boss 211 is further provided on the first end 210. Combined with Figure 5 and Figure 6 shown, the handle 10 is further provided with a stepped hole 133 and a special-shaped hole 134, wherein the stepped hole 133 is located on the side of the connecting hole 131 away from the second end 220 of the connecting sleeve 20.

[0066] Specifically, the stepped hole 133 is located on the left side of the connecting hole 131, the connecting sleeve 20 is inserted into the connecting hole 131 from the right side of the connecting hole 131, the second end 220 of the connecting sleeve 20 is located on the right side of the connecting hole 131, and in the axial direction of the connecting sleeve 20 ( Figure 6 in the horizontal direction in

[0067] The irregular-shaped hole 134 is radially communicated with the connecting hole 131, and the irregular-shaped hole 134 is radially communicated with the stepped hole 133, and the irregular-shaped hole 134 is configured to allow the limiting boss 211 to pass through along a predetermined path. That is to say, the limiting boss 211 can only pass through the irregular-shaped hole 134 and enter the stepped hole 133 along a specific angle. If the limiting boss 211 rotates a certain angle, the limiting boss 211 will not be able to be inserted into the irregular-shaped hole 134 or cannot exit from the irregular-shaped hole 134.

[0068] A positioning hole 135 is further formed on the side of the handle 10 facing away from the connecting sleeve 20. The positioning hole 135 is axially communicated with the stepped hole 133, and the positioning hole 135 corresponds to the irregular-shaped hole 134 in the axial direction of the connecting sleeve 20. The intramedullary nail aiming device 100 further includes a positioning pin 50 for inserting into the positioning hole 135.

[0069] When assembling the connecting sleeve 20 to the handle 10, the first end 210 is inserted into the handle 10, and at the same time, the limiting boss 211 at the first end 210 passes through the irregular-shaped hole 134 and enters the stepped hole 133. The step on the inner wall of the stepped hole 133 axially limits the insertion depth of the limiting boss 211. Then, the first end 210 is slightly rotated first to stagger the limiting boss 211 from the irregular-shaped hole 134 in the circumferential direction of the connecting sleeve 20. At this time, the limiting boss 211 will be blocked by both sides of the stepped hole 133, so as to realize the axial limiting function, so that the limiting boss 211 can only rotate within the stepped hole 133. Then, the positioning pin 50 is inserted. The positioning pin 50 corresponds to the irregular-shaped hole 134 in the circumferential direction, and one end of the positioning pin 50 just lies on the rotation track of the limiting boss 211. In this way, the limiting boss 211 will be blocked by the positioning pin 50 and cannot rotate to a position where it can pass through the irregular-shaped hole 134, so the limiting boss 211 will not come out of the stepped hole 133. The circumferential direction mentioned here refers to the circumferential direction of the connecting sleeve 20. By the above means, the handle 10 can rotate smoothly and does not affect the axial positioning accuracy between the handle 10 and the connecting sleeve 20.

[0070] As described in the foregoing embodiments, rotating the handle 10 can adjust the angle of the handle 10. Since the main nail is implanted in the medullary cavity during the operation by the doctor and is blocked by the bone and cannot be directly seen, it is impossible to determine whether the handle 10 has been rotated to the corresponding position.

[0071] In order to solve the above problem, in one embodiment, the first end 210 of the connecting sleeve 20 is set to be cylindrical, and the outer surface of the first end 210 is provided with a plurality of position sensing grooves 212 evenly distributed along the circumferential direction; the intramedullary nail aimer 100 also includes an indicating component 60 installed on the handle 10. The phase difference of the position sensing groove 212 in the circumferential direction can be determined according to the angle of the locking nail to be inserted. In addition, the position sensing groove 212 corresponds to the aforementioned limiting groove 241 one by one, and the phase difference of the two in the circumferential direction of the connecting sleeve 20 is set to be 180°.

[0072] Combination Figure 12 and 13 As shown, the indicating component 60 includes a retaining member 610, a positioning member 620, and an elastic member 630, wherein the retaining member 610 is mounted on the handle 10, the positioning member 620 is movably mounted on the retaining member 610 so as to be able to cooperate with the position sensing slot 212, and the elastic member 630 is located between the retaining member 610 and the positioning member 620, and is used to provide an elastic force to move the positioning member 620 toward the position sensing slot 212. Under the elastic force of the elastic member 630, the positioning member 620 can be pressed against the cylindrical surface of the first end 210, and when the handle 10 is rotated to a specified position, the positioning member 620 is pushed into the position sensing slot 212, thereby providing a hand-feel feedback to the doctor, and more intuitively perceiving the position of the rotation of the handle 10. In addition, since the position sensing groove 212 corresponds one-to-one with the aforementioned limit groove 241, the phase difference between the two in the circumferential direction of the connecting sleeve 20 is set to 180°. When the doctor senses that the handle 10 has rotated to a predetermined position, the clutch 410 can be released to lock the handle 10.

[0073] like Figure 13 As shown, in one embodiment, the position sensing groove 212 is specifically configured as a spherical groove, and the spherical groove specifically refers to a groove whose inner wall is a spherical part, and its radial cross-section is semicircular. The positioning member 620 is a sphere, and the elastic member 630 is a spring. The retaining member 610 is provided with an inner cavity 611 with an opening at one end and a closed end at the other end. The positioning member 620, i.e., the sphere, is placed in the inner cavity 611 and is partially exposed outside the inner cavity 611. The elastic member 630, i.e., the spring, is placed between the positioning member 620 and the bottom wall of the inner cavity 611. The inner diameter of the inner cavity 611 at the opening is smaller than the diameter of the sphere, and the inner diameter of the inner cavity 611 at other places is larger than the diameter of the sphere, so that the positioning member 620 can axially reciprocate in the inner cavity 611 but will not fall out of the inner cavity 611.

[0074] In this embodiment, the components of the indicator component 60 are integrated together and then integrally mounted to the handle 10. In order to facilitate the installation of the indicator component 60, as shown in FIG. Figure 6 As shown, a mounting hole 136 is provided on the handle 10 , and the mounting hole 136 radially connects the connecting hole 131 with the outside, the retaining member 610 is fixed in the mounting hole 136 , and the positioning member 620 can move radially along the connecting hole 131 .

[0075] Further, for the convenience of disassembling and assembling the indicating member 60, the mounting hole 136 is provided as a threaded hole 122, and the retaining member 610 has an external thread 612 that is threadedly connected to the threaded hole 122. The indicating member 60 is connected to the handle 10 by a threaded connection.

[0076] In other embodiments, the respective constituent elements of the indicating member 60 can be separately assembled into the mounting hole 136. For example, the positioning member 620 is received in the mounting hole 136. The positioning member 620 can only partially enter the connection hole 131 through the mounting hole 136 to cooperate with the position sensing groove 212. The retaining member 610 plugs the mounting hole 136 to prevent the positioning member 620 from coming out of the mounting hole 136, and the elastic member 630 is placed between the positioning member 620 and the retaining member 610. The positioning member 620 can only partially enter the connection hole 131 through the mounting hole 136 can be achieved in the following or similar ways: the positioning member 620 is a sphere, and the inner diameter of the end of the mounting hole 136 communicating with the connection hole 131 is set to be slightly smaller than the diameter of the positioning member 620.

[0077] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0078] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. An intramedullary nail aiming device, characterized in that, Comprising a handle, the handle includes an arc-shaped main body, one end of the arc-shaped main body is provided with a positioning portion, the other end is connected to a connecting sleeve, the positioning portion is used to connect a sighting bracket for aiming at the hole position on the main nail of the intramedullary nail, and the handle is provided with a connecting hole; a connecting sleeve, rotatably connected to the handle, the connecting sleeve has opposite first and second ends along its axial direction, and the first end is rotatably inserted into the connecting hole; a limiting boss is further provided on the first end; the handle is further provided with a stepped hole and a special-shaped hole, the stepped hole is located on a side of the connecting hole away from the second end of the connecting sleeve, the special-shaped hole is radially communicated with the connecting hole, the special-shaped hole is axially communicated with the stepped hole, and the special-shaped hole is configured to enable the limiting boss to pass through along a predetermined path; a positioning hole is further opened on a side of the handle away from the second end of the connecting sleeve, and the positioning hole is axially communicated with the stepped hole; the limiting boss at the first end extends into the stepped hole; the intramedullary nail sighting device further includes a positioning pin inserted into the positioning hole, the positioning pin corresponds to the special-shaped hole in the circumferential direction, and the positioning pin is located on the rotation track of the limiting boss; a clutch member, movably installed relative to the handle, the clutch member can move between a first position and a second position relative to the handle, wherein in the first position, the clutch member is combined with the connecting sleeve, and the handle is fixed in the circumferential direction relative to the connecting sleeve, and in the second position, the clutch member is separated from the connecting sleeve, and the handle can rotate around the circumferential direction of the connecting sleeve; When it is necessary to use the sighting bracket to aim at the hole positions at other angles, the clutch member is switched to the second position, then the handle is rotated by a certain angle, and then the handle is locked by the clutch member; It further includes a reset member, arranged between the clutch member and the handle, and the reset member is configured to provide a reset force for moving the clutch member from the second position to the first position.

2. The intramedullary nail aiming device according to claim 1, characterized in that, A groove is opened on the handle, the reset member is arranged in the groove, and the clutch member is installed in the groove and partially exposed outside the handle.

3. The intramedullary nail aiming device according to claim 1, characterized in that The connecting sleeve is provided with a limiting portion, the limiting portion is provided with a limiting groove extending along the axial direction of the connecting sleeve, and a plurality of the limiting grooves are arranged along the circumferential direction of the connecting sleeve. The clutch member has a locking member. When the clutch member is in the first position, the locking member enters the limiting groove, and when the clutch member is in the second position, the locking member is located outside the limiting groove.

4. The intramedullary nail aiming device according to claim 3, characterized in that, The inside of the connecting sleeve has a through hole penetrating the connecting sleeve along its axial direction. The intramedullary nail sighting device further includes a tightening bolt, the tightening bolt is inserted through the through hole, the tightening bolt includes a head and a bolt portion, the head abuts against the first end of the connecting sleeve, and part of the bolt portion extends out of the second end of the connecting sleeve.

5. The intramedullary nail aiming device according to claim 3, characterized in that The first end of the connecting sleeve is cylindrical, and a plurality of position sensing grooves evenly distributed in the circumferential direction are provided on the outer surface of the first end; an installation hole is formed in the handle, and the intramedullary nail aiming device further includes an indicating component installed in the installation hole. The indicating component includes a positioning member, an elastic member, and a holding member. The elastic member is located between the holding member and the positioning member, and the elastic member is configured to provide an elastic force that enables the positioning member to cooperate with the position sensing groove.

6. The intramedullary nail aiming device according to claim 5, characterized in that, The installation hole communicates with the connection hole and the outside in the radial direction. The holding member is embedded in the installation hole. The holding member is provided with an inner cavity with one end open and the other end closed. The positioning member is placed in the inner cavity and partially exposed outside the inner cavity. The elastic member is placed between the positioning member and the bottom wall of the inner cavity.

7. The intramedullary nail aiming device according to claim 5, characterized in that, The position sensing groove is a spherical groove.

8. The intramedullary nail aiming device according to claim 5, characterized in that, The elastic member is a spring.

9. The intramedullary nail aiming device according to claim 1, characterized in that, A pin hole is formed on the end face of the positioning portion. A threaded hole axially communicating with the pin hole is provided at the bottom of the pin hole. A positioning groove extending along the axial direction of the pin hole is provided on the inner wall of the pin hole.

10. An intramedullary nail aiming device, characterized in that, including a handle, the handle includes an arc-shaped main body. One end of the arc-shaped main body is provided with a positioning portion, and the other end is connected to the connecting sleeve. The positioning portion is used to connect a aiming bracket for aiming at the hole positions on the main nail of the intramedullary nail. A connection hole is formed in the handle; a connecting sleeve, rotatably connected to the handle. The connecting sleeve has opposite first and second ends along its axial direction. The first end is rotatably inserted into the connection hole; A limiting boss is further provided on the first end; the handle is further provided with a stepped hole and a special-shaped hole. The stepped hole is located on one side of the connection hole away from the second end of the connecting sleeve. The special-shaped hole communicates with the connection hole in the radial direction. The special-shaped hole communicates with the stepped hole in the axial direction, and the special-shaped hole is configured to enable the limiting boss to pass along a predetermined path; a positioning hole is further formed on one side of the handle away from the second end of the connecting sleeve. The positioning hole communicates with the stepped hole in the axial direction; the limiting boss at the first end extends into the stepped hole; the intramedullary nail aiming device further includes a positioning pin inserted into the positioning hole. The positioning pin corresponds to the special-shaped hole in the circumferential direction, and the positioning pin is located on the rotation trajectory of the limiting boss; a locking mechanism, arranged on the handle, including a locking member and an unlocking member. The unlocking member is used to drive the locking member to move to selectively connect or disconnect from the connecting sleeve. When the locking member is connected to the connecting sleeve, the handle is fixed in the circumferential direction relative to the connecting sleeve; when the locking member is disconnected from the connecting sleeve, the handle can rotate around the circumferential direction of the connecting sleeve; When it is necessary to use the aiming bracket to aim at the hole positions at other angles, disconnect the locking member from the connecting sleeve, then rotate the handle by a certain angle, and then connect the locking member to the connecting sleeve.

Images