Connecting device, acetabular cup installer positioning assembly, acetabular cup installer and use method

Abstract

The present invention discloses a connecting device, an acetabular cup installer positioning assembly, an acetabular cup installer, and a method for use. The connecting device includes a first connecting member, a second connecting member, and an auxiliary assembly. The auxiliary assembly is used to install and remove the second connecting member from the first connecting member. Using the connecting device provided by the present invention in an acetabular cup installer can reduce displacement of the acetabular cup when removing the positioning member, shorten the installation and removal time of the positioning member, and simplify the operation.

Description

Technical Field

[0001] The present invention relates to the field of machinery, and in particular to a connecting device, an acetabular cup installer positioning assembly, an acetabular cup installer and a use method thereof. Background Art

[0002] Total hip replacement is currently the best treatment for end-stage hip diseases such as avascular necrosis of the femoral head, rheumatoid arthritis, and osteoarthritis. During the operation, the doctor prepares the patient's acetabulum and then places the pre-prepared acetabular cup prosthesis into the patient's acetabulum.

[0003] When installing the acetabular cup prosthesis, use the acetabular cup installer to position and fix the prosthesis. Figure 8 and Figure 9 As shown, the existing mortar cup installer includes a rod A, a positioning member B, a knob C, and a connecting seat D. The positioning member B is fixedly connected to the connecting seat D, and the connecting seat D is sleeved on the rod A. The positioning member B and the connecting seat D can be detachably connected to the rod A through the knob C, and form an angle with the rod A.

[0004] During surgery, first place connector D over rod A and turn knob C to secure connector D. Connect one end of rod A to the acetabular cup prosthesis. Operate the acetabular cup installer to place the prosthesis in the acetabulum. Use the angle between positioning piece B and rod A to position the prosthesis. Then, remove positioning piece B and connector D, and tap the proximal end of rod A to secure the prosthesis in the acetabulum.

[0005] To remove positioning member B, the operator must first turn knob C and then pull connector D proximally along rod A to remove it. This cumbersome process requires the operator to use one hand to turn knob C and the other to pull connector D. Using both hands can even cause the already positioned acetabular prosthesis to shift in the hip, prolonging the procedure and causing significant inconvenience to the operator. Summary of the Invention

[0006] The purpose of the present invention is to reduce the displacement of the acetabular cup when the positioning piece is disassembled, shorten the installation and removal time of the positioning piece, and simplify the operation.

[0007] To achieve the above-mentioned object, the present invention provides a connecting device, comprising: a first connecting member, a second connecting member, and an auxiliary component, through which the second connecting member is installed on the first connecting member and the second connecting member is removed from the first connecting member;

[0008] The first connecting member is provided with a first through hole and a second through hole which are interconnected, the first through hole allowing the auxiliary component to pass through, and the second through hole allowing the second connecting member to be inserted into;

[0009] The front side surface of the second connecting member is recessed inwardly to form a recessed portion surrounded by the first plug and the second plug;

[0010] The auxiliary component includes a pin body, and the pin body is placed in the first through hole;

[0011] The front end of the second connecting member is inserted into the second through hole so that the pin body enters the recessed portion, and the second connecting member is installed on the first connecting member.

[0012] Optionally, plug chamfers are provided between the front side and the inner side of the first plug, and between the front side and the inner side of the second plug;

[0013] The pin body is a tapered pin, comprising a first column and a truncated cone portion connected in sequence, wherein one end of the first column extends outward in a manner of gradually increasing diameter to form the truncated cone portion;

[0014] The maximum distance between the chamfers of the plug is not greater than the maximum diameter of the truncated cone portion and not less than the minimum diameter of the truncated cone portion; the minimum distance between the chamfers of the plug is not less than the minimum diameter of the truncated cone portion.

[0015] Optionally, the minimum distance between the chamfers of the plug is equal to the minimum diameter of the frustum portion.

[0016] Optionally, the chamfer of the plug is a rounded corner.

[0017] Optionally, the front side surface of the second connecting member is recessed inward to form a first recessed portion and a second recessed portion that are connected in sequence; in the first recessed portion, the distance between the inner side surfaces of the first plug and the second plug is equal to the diameter of the first cylinder.

[0018] Optionally, the second recessed portion is a cylindrical structure, and the diameter of the cylindrical structure is larger than the diameter of the first cylinder and not larger than the maximum diameter of the frustum portion.

[0019] Optionally, the pin body further includes a second cylinder connected to the frustum portion; the frustum portion extends outward at its largest diameter to form the second cylinder; and the diameter of any cross section of the second cylinder is not less than the maximum diameter of the frustum portion.

[0020] Optionally, the truncated cone portion with the largest diameter extends outward with a constant diameter to form the second column.

[0021] Optionally, an axis of the first through hole and an insertion direction of the second connecting member are perpendicular to each other.

[0022] Optionally, the second through hole is a waist-shaped hole, and the opening direction of the waist-shaped hole is perpendicular to the axis of the first through hole.

[0023] Optionally, the auxiliary component further includes a spring and a button, and the pin is connected to the button after passing through the spring; the spring is placed in the first through hole, and the button is at least partially exposed outside the first connecting member.

[0024] Optionally, the first through hole includes a pin body area for placing the pin body and a spring area for placing the spring; the shape of the pin body area is adapted to the pin body, and the shape of the spring area is adapted to the spring.

[0025] Optionally, the diameter of the spring area is larger than the minimum diameter of the pin body area, so that the spring can only move within the spring area.

[0026] Optionally, the pin body is movable within the pin body region.

[0027] The present invention also provides an acetabular cup installer positioning assembly, including the above-mentioned connecting device; the first connecting member is a positioning seat, and the second connecting member is an angle rod; the acetabular cup installer includes a positioning frame, which is connected to the positioning assembly, and the acetabular cup is positioned in the acetabulum through the angle formed by the positioning frame.

[0028] Optionally, on the positioning seat, the surface where the second through hole is formed is an inclined surface.

[0029] Optionally, the insertion direction of the angle rod is perpendicular to the inclined surface.

[0030] Optionally, the mortar further comprises a sleeve for connecting the positioning assembly to the acetabular cup mounter, and the positioning seat is connected to the sleeve.

[0031] Optionally, the positioning seat and the sleeve are an integrated structure.

[0032] Optionally, a nut is provided at the proximal end of the sleeve and connected to the sleeve, for limiting the sliding of the sleeve.

[0033] The present invention also provides an acetabular cup installer, comprising a main rod, a positioning assembly, a mounting handle, and a positioning frame connected to the positioning assembly, which are connected in sequence. The acetabular cup is positioned in the acetabulum through the angle formed by the positioning frame; the positioning assembly includes the above-mentioned connecting device, the first connecting member is a positioning seat, and the second connecting member is an angle rod.

[0034] Optionally, on the positioning seat, the surface where the second through hole is formed is an inclined surface.

[0035] Optionally, the insertion direction of the angle rod is perpendicular to the inclined surface.

[0036] Optionally, the positioning seat is a cubic structure comprising a first inclined surface and a second inclined surface; the first inclined surface is inclined from the top of the positioning seat to the bottom of the distal end; the second inclined surface is inclined from the top of the positioning seat to the bottom of the proximal end; and the second through hole is opened on the second inclined surface.

[0037] Optionally, the insertion direction of the angle rod is perpendicular to the second inclined surface.

[0038] Optionally, after the angle rod is inserted into the second through hole, the straight line where the angle rod is located and the straight line where the main rod is located form an angle opening toward the proximal end, and the angle is 45°.

[0039] Optionally, the axis of the first through hole and the center axis of the main rod are perpendicular to each other.

[0040] Optionally, the positioning frame is detachably connected to the angle rod.

[0041] Optionally, the positioning frame includes a first support rod and a second support rod that cross each other.

[0042] Optionally, the first support rod and the second support rod cross each other to form an X shape or a V shape.

[0043] Optionally, the included angle between the first support rod and the second support rod is 20°.

[0044] Optionally, the positioning assembly comprises a sleeve for connecting the positioning assembly to the acetabular cup mounter, and the positioning seat is connected to the sleeve.

[0045] Optionally, the sleeve is a hollow cylinder, and the proximal end of the main rod is provided with a protruding insertion portion, the outer diameter of the insertion portion is adapted to the inner diameter of the sleeve, and can be inserted into the distal end of the sleeve.

[0046] Optionally, the positioning seat and the sleeve are an integrated structure.

[0047] Optionally, a nut connected to the sleeve is also included.

[0048] Optionally, the nut is provided at the proximal end of the sleeve to prevent the sleeve from sliding toward the proximal end.

[0049] The present invention also provides a method for using an acetabular cup installer, the acetabular cup installer comprising a main rod, a positioning assembly, a mounting handle, and a positioning frame connected to the positioning assembly, wherein the acetabular cup is positioned in the acetabulum through the angle formed by the positioning frame; the positioning assembly comprises the above-mentioned connecting device, the first connecting member is a positioning seat, and the second connecting member is an angle rod;

[0050] The method of use includes: connecting the positioning frame to the angle rod, inserting the angle rod into the second through hole, and allowing the pin body to enter the recessed portion; after adjusting the angle of the acetabular cup through the positioning frame, withdrawing the angle rod from the second through hole; knocking the proximal end of the installation handle to fix the acetabular cup into the acetabulum; and removing the acetabular cup installer.

[0051] The beneficial effects of the present invention are:

[0052] The present invention provides a connecting device that can be applied to various mechanical structures. The connecting device is used on an acetabular cup installer, which is convenient for the user to disassemble with one hand during surgery. The acetabular cup with a determined insertion angle is not easily displaced due to the installation and removal of the acetabular cup installer, thereby reducing the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 Schematic diagram of the acetabular cup mounter of the present invention.

[0054] Figure 2 This is an exploded view of the positioning assembly of the present invention.

[0055] Figure 3 It is a schematic diagram of the positioning seat of the present invention.

[0056] Figure 4 Schematic diagram of the angle rod interface of the present invention.

[0057] Figure 5 Schematic diagram of the tapered pin of the present invention.

[0058] Figure 6 It is a cross-sectional view of the positioning seat of the present invention.

[0059] Figure 7a Schematic diagram of the positioning assembly of the present invention in the first state.

[0060] Figure 7b Schematic diagram of the tapered pin and angle rod of the present invention in the second state.

[0061] Figure 7c Schematic diagram of the tapered pin and angle rod of the present invention in the third state.

[0062] Figure 7d Schematic diagram of the tapered pin and angle rod of the present invention in the fourth state.

[0063] Figure 7e It is a schematic diagram of the positioning assembly of the present invention during the process of the angle rod withdrawing.

[0064] Figure 8 It is a schematic diagram of the structure of an existing acetabular cup installer.

[0065] Figure 9 This is an enlarged view of the knob C of the existing acetabular cup installer.

[0066] In the figure, 1-main rod, 2-positioning assembly, 21-button, 22-spring, 23-positioning seat, 231-first through hole, 232-second through hole, 24-tapered pin, 240-cone portion, 241-first column, 242-second column, 25-sleeve, 26-angle rod, 261-first end of angle rod, 2611-first plug, 2612-second plug, 2613-first recess, 2614-second recess, 2615-plug chamfer, 27-nut, 3-mounting handle, A-rod, B-positioning piece, C-knob, D-connecting seat. DETAILED DESCRIPTION

[0067] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0068] In the description of the present invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0069] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0070] In this article, "distal end" refers to the end away from the operator, and "proximal end" refers to the end close to the operator. Figure 7a For example, the conical pin 24 is defined as moving in the first through hole 231 in a direction away from the button 21 as the “first direction”; the conical pin 24 is defined as moving in the first through hole 231 in a direction close to the button 21 as the “second direction”. Figure 1 、 Figure 2and Figure 3 The provided diagram is a view from the proximal end to the distal end of the acetabular cup installer; in order to facilitate the display of the connection method and installation and removal process of the connecting device, Figure 6 、 Figure 7a 、 Figure 7b 、 Figure 7c 、 Figure 7d and Figure 7e Provided is a schematic diagram of the cup mount from a perspective looking from the distal end to the proximal end.

[0071] like Figure 1 As shown, the acetabular cup installation device provided by the present invention includes a main rod 1, a positioning assembly 2, and an installation handle 3, which are connected in sequence from the distal end to the proximal end, and a positioning frame 4 connected to the positioning assembly 2. The distal end of the main rod 1 is connected to the acetabular cup, and the acetabular cup is positioned in the human acetabulum via the positioning frame 4. After that, the positioning frame 4 is removed, and the proximal end of the installation handle 3 is struck in the direction of the main rod 1 to install the acetabular cup in place.

[0072] like Figure 2 and Figure 3 As shown, the positioning assembly 2 includes a positioning seat 23 and a sleeve 25, and the positioning seat 23 is connected to the sleeve 25. In this example, the positioning seat 23 and the sleeve 25 are an integrated structure. The distal end of the sleeve 25 is connected to the main rod 1, and the proximal end is connected to the mounting handle 3. In this example, the sleeve 25 is a hollow cylinder, and the proximal end of the main rod 1 is provided with a protruding insertion portion. The outer diameter of the insertion portion is adapted to the inner diameter of the sleeve 25, and can be inserted into the distal end of the sleeve 25 to achieve the connection between the main rod 1 and the sleeve 25. A nut 27 is provided at the proximal end of the sleeve 25 for fixing the position of the sleeve 25 and preventing the sleeve 25 and the positioning seat 23 from sliding along the axial direction of the main rod 1. A first through hole 231 is set through the positioning seat 23 for inserting the button 21, the spring 22 and the tapered pin 24; a second through hole 232 is also provided on the positioning seat 23 for inserting the angle rod 26. The first through hole 231 and the second through hole 232 are connected. Preferably, the axis of the first through hole 231 is perpendicular to the insertion direction of the angle rod 26, and the axis of the first through hole 231 is perpendicular to the central axis of the main rod 1. In this example, the second through hole 232 is a waist-shaped hole, and the opening direction of the waist is perpendicular to the axis of the first through hole 231. In some embodiments, the angle rod 26 and the positioning frame 4 are a split structure, and the angle rod 26 is connected to the positioning frame 4; or the angle rod 26 and the positioning frame 4 are an integrated structure, and the angle rod 26 is arranged at one end of the positioning frame 4. The positioning frame 4 includes a first support rod and a second support rod that intersect each other. After the first support rod and the second support rod intersect each other, they form an X-shape or a V-shape. The angle formed by the first support rod and the second support rod can be set arbitrarily as needed. In this example, the angle between the first support rod and the second support rod is 20°.

[0073] In this embodiment, the positioning seat 23 is a cubic structure with two inclined surfaces. The first inclined surface slopes downward from the top of the positioning seat 23 toward the distal end, while the second inclined surface slopes downward from the top of the positioning seat 23 toward the proximal end. A second through hole 232 is defined on the second inclined surface. The second inclined surface forms an angle α with the central axis of the main rod 1, which is open toward the distal end. When the angle rod 26 is fully inserted into the second through hole 232, the angle rod 26 forms an angle β with the central axis of the main rod 1, which is open toward the proximal end. The present invention does not impose any specific restrictions on the values of α and β. Regardless of the value of α, during actual processing, the angle β formed between the angle rod 26 and the second inclined surface after insertion into the second through hole 232 can be controlled by adjusting the configuration of the second through hole 232. However, in a preferred embodiment of the present invention, α and β are complementary angles, allowing the angle rod 26 to be inserted perpendicularly onto the second inclined surface. This facilitates the operator to better align the angle rod 26 with the second inclined surface and smoothly insert the angle rod 26 into the second through hole 232. Preferably, β is 45°.

[0074] like Figure 4 As shown, the angle rod 26 is a columnar structure. The first end 261 of the angle rod is shaped to match the second through hole 232 and can be inserted into the second through hole 232. The front side of the first end 261 of the angle rod is recessed inward to form a first recessed portion 2613 and a second recessed portion 2614 surrounded by a first plug 2611 and a second plug 2612. The first recessed portion 2613 and the second recessed portion 2614 are interconnected. A plug chamfer 2615 is formed between the front end of the first plug 2611 and the inner side thereof that encloses the first recessed portion 2613. Similarly, the plug chamfer 2615 is provided on the second plug 2612 in the same manner; preferably, the plug chamfer 2615 is rounded.

[0075] like Figure 5 As shown, the tapered pin 24 comprises a first cylindrical body 241, a frustum portion 240, and a second cylindrical body 242, which are connected in sequence. One end of the first cylindrical body 241 extends outward with a gradually increasing diameter to form the frustum portion 240. The frustum portion 240, at its maximum diameter, continues to extend outward to form the second cylindrical body 242. The diameter of any cross-section of the second cylindrical body 242 is no less than the maximum diameter of the frustum portion 240. In this example, the frustum portion 240 extends outward at its maximum diameter to form the second cylindrical body 242 while maintaining a constant diameter. That is, the minimum diameter of the frustum portion 240 is equal to the diameter of the first cylindrical body 241, and the maximum diameter is equal to the diameter of the second cylindrical body 242.

[0076] like Figure 6 and Figure 7aAs shown, the first through-hole 231 includes a tapered pin section 2311 and a spring section 2312. The spring section 2312 is used to accommodate the spring 22 and the button 21. The shape of the tapered pin section 2311 matches the tapered pin 24 and is used to accommodate the tapered pin 24. One end of the first column 241 is connected to the frustum 240, and the other end passes through the spring 22 and then connects to the button 21. The portion of the first column 241 that passes through the spring 22 is located within the spring section 2312. The spring section 2312 is generally cylindrical in shape. At the junction of the spring section 2312 and the tapered pin section 2311, the diameter of the spring section 2312 is larger than that of the tapered pin section 2311. This allows the button 21 and the spring 22 to slide within the spring section 2312 without sliding past the spring section 2312 into the tapered pin section 2311.

[0077] The first end 261 of the angle rod is inserted into the second through-hole 232, pushing the angle rod 26 so that the tapered pin 24 first contacts the plug chamfer 2615 and then sequentially enters the first recess 2613 and the second recess 2614. Finally, the angle rod 26 and the tapered pin 24 form a nested fit, thus connecting the positioning frame 4 to the positioning assembly 2. This process corresponds to the first state, the second state, the third state, and the fourth state (described in detail below).

[0078] During the process of pushing the angle rod 26 into the second through hole 232, the tapered pin 24 first moves in the first direction along the first through hole 231 and then returns to the second direction. During the movement of the tapered pin 24 in the first direction, because the diameters of the first column 241, the frustum 240, and the second column 242 increase sequentially, and the shape of the tapered pin 24 matches the first through hole 231, the size of the first through hole 231 does not hinder the movement of the tapered pin 24 in the first direction. Similarly, during the return of the tapered pin 24 in the second direction, at least when the tapered pin 24 returns to the position where the angle rod 26 is not inserted into the second through hole 232, the size of the first through hole 231 does not hinder the return of the tapered pin 24 in the second direction.

[0079] like Figure 7a As shown, in the first state, the angle rod 26 is not inserted into the second through-hole 232. The tapered pin 24 is now positioned within the first through-hole 231. The shape of the first through-hole 231 is adapted to the tapered pin 24, preventing the tapered pin 24 from moving relative to the positioning seat 23 within the first through-hole 231. The second through-hole 232 exposes the first column 241 of the tapered pin 24 and the connection between the first column 241 and the conical portion 240. The spring 22 is in its natural state, with one end contacting the inner sidewall of the spring region 2312 and the other end contacting the button 21. Partially or fully, the button 21 is exposed outside the positioning seat 23.

[0080] like Figure 7bAs shown, in the second state, the angle rod 26 is inserted into the second through-hole 232, the plug chamfer 2615 contacts the conical portion 240 of the tapered pin 24, and the tapered pin 24 moves in the first direction. The maximum distance H between the plug chamfers 2615 is no greater than the maximum diameter of the conical portion 240 and no less than the minimum diameter of the conical portion 240. The minimum distance h between the plug chamfers 2615 is no less than the minimum diameter of the conical portion 240. Preferably, h is equal to the minimum diameter of the conical portion 240, i.e., the diameter of the first column 241. The second state comprises the process in which the angle rod 26 contacts the tapered pin 24, and the axial pressure exerted by the plug chamfer 2615 along the angle rod 26 generates a force component in the first direction, pushing the tapered pin 24 in the first direction. The button 21 connected to the tapered pin 24 moves in the first direction within the spring region 2312 under the pull of the tapered pin 24. The spring 22 is compressed due to being squeezed by the button 21 and limited by the size of the spring area 2312 .

[0081] like Figure 7c As shown, in the third state, the angle rod 26 is further pushed into the second through hole 232, causing the first column 241 to enter the first recess 2613. The width of the inner side surfaces of the first plug 2611 and the second plug 2612, i.e., the width of the first recess 2613, is no greater than the length of the first column 241. The distance d between the inner side surfaces of the first plug 2611 and the second plug 2612, i.e., the width of the first recess 2613, is equal to the diameter of the first column 241 and no greater than the diameter of the frustum 240. Therefore, in the third state, the spring 22 can continue to be compressed. Although the spring 22 is compressed and the button 21 is subjected to the elastic force of the spring 22, there is a tendency for the tapered pin 24 to return to the first state along the second direction. However, in the process of pushing the angle rod 26, only the first column 241 is always inserted into the first recess 2613. Due to the limitation of the width of the first recess 2613 on the conical portion 240, the tapered pin 24 will never return to the second direction, and the button 21 will not return to the second direction either.

[0082] like Figure 7dAs shown, in the fourth state, the angle rod 26 is further pushed into the second through-hole 232, causing the tapered pin 24 to return to the second direction, with part or all of the truncated cone 240 entering the second recess 2614. The second recess 2614 is a concave cylindrical structure with a diameter D greater than the diameter of the first cylinder 241 and less than or equal to the diameter of the second cylinder 242. At the junction of the second recess 2614 and the first recess 2613, near the second recess 2614, the distance between the inner side of the first plug 2611 and the inner side of the second plug 2612 is greater than d. When the angle rod 26 moves until the second recess 2614 contacts the tapered pin 24, the space for the tapered pin 24 to pass through increases, and the width of the first recess 2613 no longer restricts the truncated cone 240. Under the elastic force of the spring 22, the button 21 returns to the second direction, simultaneously pulling the tapered pin 24, causing it to also return to the second direction. Because D is less than or equal to the diameter of the second column 242, the conical portion 240 enters the second recess 2614 until the tapered pin 24 returns to a position where the diameter of the conical portion 240 equals D. At this point, the conical portion 240 again stops moving due to the restraint of the conical portion 240. At this point, the angle rod 26 is fully inserted into the second through hole 232. The angle rod 26 and tapered pin 24 are nested and locked together. Pushing or pulling the angle rod 26 forward or backward will not cause them to move. When the angle rod 26 and tapered pin 24 are nested and locked together, part of the structure of the button 21 is exposed outside the positioning seat 23. At this point, the acetabular cup is positioned in the human acetabulum by adjusting the acetabular cup installer and using the positioning frame 4.

[0083] After the acetabular cup is positioned, press the button 21 to withdraw the angle rod 26 and remove the positioning frame 4. Figure 7eAs shown, the transition from the third state to the fourth state corresponds to the expansion of spring 22. Therefore, pressing button 21 in the first direction compresses spring 22 again, pushing tapered pin 24 in the first direction and releasing it from tapered pin region 2311. Subsequently, by continuing to press button 21, the conical portion 240 partially or completely enters the second recess 2614. From the fourth state, the conical portion 240 is released from the second recess 2614, and the first column 241 enters the second recess 2614. The diameter D of the cylindrical portion is larger than the diameter of the first column 241, leaving a certain gap between the first column 241 and the second recess 2614. The angle rod 26 can be withdrawn from the second through hole 232 along the direction of the second through hole 232 without being restricted by the tapered pin 24. The angle rod 26 is further withdrawn, allowing the first column 241 to enter the first recess 2613. The width d of the first recess 2613 is equal to the diameter of the first column 241. The angle rod 26 can be withdrawn without being restricted by the tapered pin 24 until the angle rod 26 is completely withdrawn from the second through hole 232, and the positioning frame 4 is removed. The button 21 is then released. The button 21 returns to the second direction under the elastic force of the spring 22, simultaneously pulling the tapered pin 24, causing it to also return to the second direction until the first state is returned.

[0084] The method of using the acetabular cup installer provided by the present invention is as follows:

[0085] (1) Connect the positioning frame 4 to the angle rod 26, and implant the acetabular cup into the acetabular cup mounter, with the acetabular cup connected to the distal end of the main rod 1;

[0086] (2) Insert the angle rod 26 into the second through hole 232, and allow the angle rod 26 to pass through the first state, the second state, the third state, and the fourth state in sequence. The tapered pin 24 enters the first recess 2613 and the second recess 2614 in sequence until the angle rod 26 and the tapered pin 24 are nested and locked with each other, and part of the structure of the button 21 is exposed outside the positioning seat 23.

[0087] (3) Adjust the insertion angle of the acetabular cup mount: First, make the plane where the first and second rods of the positioning frame 4 are located parallel to the ground, achieving an extension angle of 45°; then make the line where the first or second rod of the positioning frame 4 is located parallel to the longitudinal axis of the body, achieving a forward flexion angle of 20°;

[0088] (4) Pre-insert the acetabular cup into the patient's acetabular socket, press the button 21, withdraw the angle rod 26, and then remove the positioning frame 4;

[0089] (5) Tap the proximal end of the mounting handle 3 to secure the acetabular cup into the acetabulum;

[0090] (6) Remove the acetabular cup installer.

[0091] In summary, the present invention provides a connection device applicable to various mechanical structures. Using an auxiliary assembly, a second connection member can be installed on and removed from a first connection member. This connection device, when used with an acetabular cup installer, facilitates single-handed removal during surgery, preventing the acetabular cup from being displaced due to installation and removal of the cup installer after its insertion angle has been determined, thereby reducing surgical time.

[0092] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A mortar cup installation positioning assembly, characterized in that: include: A positioning seat, an angle rod and an auxiliary component, through which the angle rod is installed on the positioning seat and the angle rod is removed from the positioning seat; the acetabular cup installer includes a positioning frame, which is connected to the positioning assembly, and the acetabular cup is positioned in the acetabulum through the angle formed by the positioning frame; The positioning seat is provided with a first through hole and a second through hole in communication, the auxiliary component passes through the first through hole, and the angle rod is inserted through the second through hole; the axis of the first through hole and the insertion direction of the angle rod are perpendicular to each other; The front side of the angle rod is recessed inwardly, forming a first recessed portion and a second recessed portion that are connected and surrounded by the first plug and the second plug; plug chamfers are respectively provided between the front side of the first plug and the inner side of the first recessed portion surrounded by the first plug, and between the front side of the second plug and the inner side of the first recessed portion surrounded by the second plug; The auxiliary component includes a pin body, which is placed in the first through hole; the pin body is a tapered pin, which includes a first column and a frustum portion connected in sequence, and one end of the first column extends outward in a manner of gradually increasing diameter to form the frustum portion; Wherein, within the first recessed portion, the distance between the inner side surfaces of the first plug and the second plug is equal to the diameter of the first cylinder; the second recessed portion is a cylindrical structure, the diameter of the cylindrical structure is larger than the diameter of the first cylinder and not larger than the maximum diameter of the frustum; the auxiliary component further includes a spring and a button, and the end of the first cylinder not connected to the frustum passes through the spring and is connected to the button; the spring is positioned in a spring area within the first through hole, and the portion of the first cylinder that passes through the spring is positioned within the spring area; the button is at least partially exposed outside the positioning seat, and the button and spring can slide within the spring area; During the process of inserting the front end of the angle rod into the second through hole, the chamfer of the plug contacts the conical portion of the pin body, the pin body moves along the first through hole in the direction away from the button, the first column enters the first recessed portion, the pin body returns in the direction close to the button, and the conical portion partially or completely enters the second recessed portion, so that the angle rod is installed on the positioning seat.

2. The acetabular cup mount positioning assembly according to claim 1, wherein: The maximum distance between the chamfers of the plug is not greater than the maximum diameter of the truncated cone portion and not less than the minimum diameter of the truncated cone portion; the minimum distance between the chamfers of the plug is not less than the minimum diameter of the truncated cone portion.

3. The acetabular cup mount positioning assembly according to claim 2, wherein: The minimum distance between the chamfers of the plug is equal to the minimum diameter of the frustum.

4. The acetabular cup mount positioning assembly according to claim 2, wherein: The chamfer of the plug is a rounded corner.

5. The acetabular cup mount positioning assembly according to claim 1, wherein: The pin body further includes a second column connected to the truncated cone portion; the truncated cone portion extends outward at its largest diameter to form the second column; and the diameter of any cross section of the second column is not less than the maximum diameter of the truncated cone portion.

6. The acetabular cup mount positioning assembly according to claim 5, wherein: The largest diameter portion of the truncated cone portion extends outward with a constant diameter to form the second column.

7. The acetabular cup mount positioning assembly according to claim 1, wherein: The second through hole is a waist-shaped hole, and the opening direction of the waist-shaped hole is perpendicular to the axis of the first through hole.

8. The acetabular cup mount positioning assembly according to claim 1, wherein: The first through hole also includes a pin body area for placing the other parts of the pin body except the part of the first column passing through the spring; the shape of the pin body area is adapted to the other parts of the pin body, and the shape of the spring area is adapted to the spring; the diameter of the spring area is larger than the minimum diameter of the pin body area, so that the spring can only move within the spring area.

9. The acetabular cup mount positioning assembly according to claim 8, wherein: The other part of the pin body is movable within the pin body region.

10. A mortar cup installer, characterized in that: The acetabular cup is positioned in the acetabulum by an angle formed by the positioning frame.

11. The acetabular cup mount according to claim 10, wherein: The surface of the positioning seat where the second through hole is formed is an inclined surface.

12. The acetabular cup mount according to claim 11, wherein: The insertion direction of the angle rod is perpendicular to the inclined surface.

13. The acetabular cup mount according to claim 10, wherein: The positioning seat is a cubic structure including a first inclined surface and a second inclined surface; the first inclined surface is inclined from the top of the positioning seat to the bottom of the distal end; the second inclined surface is inclined from the top of the positioning seat to the bottom of the proximal end; the second through hole is opened on the second inclined surface.

14. The acetabular cup mount according to claim 13, wherein: The insertion direction of the angle rod is perpendicular to the second inclined surface.

15. The acetabular cup mount according to any one of claims 11 or 13, wherein: After the angle rod is inserted into the second through hole, the straight line where the angle rod is located and the straight line where the main rod is located form an angle opening toward the proximal end, and the angle is 45°.

16. The acetabular cup mount according to claim 10, wherein: The axis of the first through hole is perpendicular to the center axis of the main rod.

17. The acetabular cup mount according to claim 10, wherein: The positioning frame is detachably connected to the angle rod.

18. The acetabular cup mount according to claim 17, wherein: The positioning frame includes a first support rod and a second support rod that cross each other.

19. The acetabular cup mount according to claim 18, wherein: The first support rod and the second support rod cross each other to form an X shape or a V shape.

20. The acetabular cup mount according to claim 18, wherein: The included angle between the first support rod and the second support rod is 20°.

21. The acetabular cup mount according to claim 10, wherein: The positioning assembly includes a sleeve for connecting the acetabular cup mounter positioning assembly to the acetabular cup mounter, and the positioning seat is connected to the sleeve.

22. The acetabular cup mount according to claim 21, wherein: The sleeve is a hollow cylinder. The proximal end of the main rod is provided with a protruding insertion portion. The outer diameter of the insertion portion is adapted to the inner diameter of the sleeve and can be inserted into the distal end of the sleeve.

23. The acetabular cup mount according to claim 21, wherein: The positioning seat and the sleeve are an integrated structure.

24. The acetabular cup mount according to claim 21, wherein: Also included is a nut connected to the sleeve.

25. The acetabular cup mount according to claim 24, wherein: The nut is arranged at the proximal end of the sleeve to prevent the sleeve from sliding toward the proximal end.

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