Hallux valgus correcting and guiding device

Abstract

The invention relates to the technical field of surgical instruments, provides a hallux valgus correcting and guiding device, and further solves the problem of metatarsal bone rotation on the basis of meeting the traditional basic requirements of inward pushing and metatarsal bone fixing. The device comprises a guider support, a front-end metatarsal bone traction mechanism, a front-end metatarsal bone transverse pushing mechanism and a rotation angle indicating mechanism, and the front-end metatarsal bone traction mechanism is rotationally installed in a rotary installation cavity in the front end of the guider support and can be locked and fixed by a locking piece; the front-end metatarsal bone transverse pushing mechanism and the rotation angle indicating mechanism are arranged on the front side and the rear side of the front-end metatarsal bone traction mechanism respectively, a pushing frame body is arranged at the lower end of a pushing rod of the front-end metatarsal bone transverse pushing mechanism, and a first traction needle of the front-end metatarsal bone traction mechanism can penetrate through the middle hollow-out position of the pushing frame body; and the rotation angle indicating mechanism is used for displaying the angle position of the front-end metatarsal bone traction mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of surgical instruments, and in particular to a hallux valgus correction guide device. Background Art

[0002] The incidence of hallux valgus is about 15%, which is more common in the central region and slightly lower in the coastal areas. According to the population of 1.4 billion in my country, there are about 200 million hallux valgus patients in China, most of whom are female patients, accounting for 20-30%. Hallux valgus deformity is a common foot disease that can cause the patient's foot to be valgus. The current surgery to correct hallux valgus deformity is an osteotomy process using existing orthopedic tools. After the osteotomy, the bone fragments are rearranged and fixed with screws. The surgeon can insert the screws obliquely into the bone in a minimally invasive manner.

[0003] The prior patent application with patent number 202211080334.5 and patent name "A hallux valgus correction guide device and correction method" in which the inventor participated in the research and development can adjust the position of the guide slider while holding the guide bracket, making the positioning of the hallux valgus surgery more accurate. However, it was found in the actual surgery and research process that hallux valgus deformity not only exists in hallux valgus, but is also often accompanied by metatarsal rotation. Therefore, after conventional osteotomy, internal push, bone cutting, and fixation correction, metatarsal rotation often leads to recurrence of hallux valgus.

[0004] To this end, we propose a hallux valgus correction guide device. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art, the present invention provides a hallux valgus correction guide device, which overcomes the deficiencies of the prior art, has a reasonable design, is easy to use, and further solves the problem of metatarsal rotation on the basis of meeting the basic requirements of traditional inward push and fixation of metatarsals.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A hallux valgus correction guide device, characterized in that it includes a guide bracket, a front metatarsal traction mechanism, a front metatarsal transverse pushing mechanism and a rotation angle indicating mechanism, wherein the front metatarsal traction mechanism is rotatably installed in a rotation installation cavity at the front end of the guide bracket and can be locked and fixed by a locking member, the front metatarsal transverse pushing mechanism and the rotation angle indicating mechanism are respectively arranged at the front and rear sides of the front metatarsal traction mechanism, a pushing frame body is provided at the lower end of a push rod of the front metatarsal transverse pushing mechanism, a first traction needle of the front metatarsal traction mechanism can pass through a middle hollow portion of the pushing frame body, and the rotation angle indicating mechanism is used to display the angular position of the front metatarsal traction mechanism.

[0010] Furthermore, a pair of parallel and spaced panels are provided at the front end of the guide bracket, which are a front panel and a rear panel respectively. The front panel and the rear panel are connected by a crossbeam on both sides and enclosed to form a rotating installation cavity. The inner sides of the front panel and the rear panel are symmetrically provided with arc-shaped guide grooves. A locking piece is installed on the front panel, and the rear panel is connected to the guide bracket;

[0011] The front metatarsal traction mechanism is provided with arc-shaped pivot blocks at the front and rear sides, and the arc-shaped pivot blocks are slidably installed in the arc-shaped guide groove, so that the front metatarsal traction mechanism can rotate along the arc-shaped guide groove.

[0012] Furthermore, the rotation angle indicating mechanism includes a position pointing piece, an angle scale panel and a panel fixing base. The position pointing piece is installed on the front metatarsal traction mechanism and cooperates with the angle scale panel to display the angle position of the front metatarsal traction mechanism. The angle scale panel is inserted and fixed on the panel fixing base, and the panel fixing base is fixed on the guide bracket.

[0013] Furthermore, the position pointing member is a linear light source, which is fixed to the side wall of the cap and can emit a linear light beam perpendicular to the angle scale panel, and the width of the linear light beam is preferably less than 1 mm;

[0014] Alternatively, the position pointing member is a pointer, the tail end of the pointer is sleeved and fixed on the cap through a ring, and the front end of the pointer points to the angle scale panel.

[0015] Furthermore, the front end metatarsal traction mechanism includes a first traction needle, a cap, a main sleeve seat and a limit block. The first traction needle axially penetrates the cap and the main sleeve seat in sequence. The cap is sleeved on the main sleeve seat. The top wall of the cap extends downward to form a pair of drive blocks arranged at intervals. A pair of limit blocks are slidably installed on the top of the main sleeve seat. The pair of limit blocks are respectively arranged on both sides of the first traction needle. The drive block and the limit block are matched through inclined surfaces. When the cap is pressed down, the drive block moves downward and drives the limit block to move laterally to clamp the first traction needle.

[0016] Specifically, the top of the main sleeve seat is provided with an upper step groove and a lower step groove which are arranged from top to bottom and coaxial with the axial through hole thereof, and a pair of horizontally arranged guide pillars are provided in the upper step groove, and the two ends of a pair of limit blocks are respectively slidably mounted on the pair of guide pillars, and a first spring is mounted on the pair of guide pillars, and the two ends of the first spring respectively elastically abut against a pair of limit blocks.

[0017] Further, at least one pair of buckles is provided on the side wall of the cap, and the buckle includes a connecting arm and a clamping portion, the upper end of the connecting arm is connected to the side wall of the cap through an elastic hinge portion, the clamping portion is integrally formed at the lower end of the connecting arm and extends toward the inner side of the cap, and the inner bottom of the clamping portion is provided with a clamping portion guide inclined surface;

[0018] A card slot combination corresponding to the buckles is provided on the side wall of the main sleeve seat, and each card slot combination includes an upper card slot and a lower card slot arranged from top to bottom, and an upper card slot guide inclined surface is provided at the lower edge of the upper card slot, and a first positioning slot is formed by extending upward in the middle of the upper part of the lower card slot, and a sliding unlocking block that slides up and down is provided in the lower card slot, and the sliding unlocking block includes a horizontal bar body and a positioning portion located in the upper center of the horizontal bar body and extending upward, the positioning portion is provided with an upper unlocking block guide inclined surface, and the horizontal bar body is provided with a lower unlocking block guide inclined surface, and when the sliding unlocking block slides upward, its positioning portion can be embedded in the first positioning slot at the raised part of the upper end of the lower card slot, and the upper end surface of the horizontal bar body can fit with the upper end surface of the lower card slot.

[0019] Furthermore, the front end metatarsal transverse pushing mechanism includes a transverse pushing adjustment sleeve and a limiting sleeve. The front panel of the guide bracket protrudes outwardly and is provided with a pair of front upper support plates and front lower support plates spaced apart from top to bottom. The front upper support plate is provided with a positioning sleeve extending upward. The lower part of the transverse pushing adjustment sleeve is inserted in the positioning sleeve. The limiting sleeve is sleeved between the transverse pushing adjustment sleeve and the positioning sleeve. The limiting sleeve is threadedly matched with the positioning sleeve and limits the lower supporting flange at the lower end of the transverse pushing adjustment sleeve. The rod body of the push rod is provided with a threaded portion and a spline portion distributed from top to bottom. The threaded portion passes through the front upper support plate and the positioning sleeve and then is threadedly matched with the transverse pushing adjustment sleeve. The spline portion is matched with the spline hole on the front lower support plate.

[0020] Furthermore, the device also includes a rear end metatarsal positioning mechanism, which includes a fixing hook, a pressure sleeve and a second spring. A pressure plate is fixed in the middle area of ​​the rod-shaped body of the fixing hook. A waist-shaped step hole is opened on the guide bracket. The pressure plate is slidably installed in the waist-shaped step hole. The pressure sleeve is sleeved on the outside of the rod-shaped body of the fixing hook and penetrates downwardly through the rear upper support plate of the guide bracket. The second spring is sleeved on the pressure sleeve and elastically presses the pressure sleeve downward onto the pressure plate.

[0021] Specifically, the upper end of the waist-shaped sleeve body of the press sleeve is detachably installed with an upper limit flange, the lower part thereof is protruding outwardly with a lower limit flange, and the bottom thereof is protruding downwardly with a press-fitting flange, the upper limit flange and the lower limit flange are respectively arranged on the upper and lower sides of the rear upper support plate, the two ends of the second spring respectively abut against the lower limit flange and the rear upper support plate, and the press-fitting flange is annular and is used for press-fitting the pressure plate.

[0022] Furthermore, the rear end metatarsal positioning mechanism includes a U-shaped driving component, which includes a connecting panel, a driving arm arranged on the left and right sides of the connecting panel and extending in the front-to-back direction, and the left and right sides of the upper limit flange extend outward to form ears, and the driving arm and the ear cooperate through the inclined surface to drive the pressure sleeve to lift upward.

[0023] Specifically, the driving arm is slidably mounted in the long guide groove on the upper end of the rear upper support plate, a second positioning groove is formed at the end of the driving arm, a driving inclined surface is formed at the end of the second positioning groove, and a driven protrusion extending downward is provided on the ear portion, and the driven protrusion can extend into the second positioning groove and cooperate with the driving inclined surface;

[0024] The connecting panel is provided with a long guide hole parallel to the driving arm, and the limiting bolt passes through the long guide hole and is threadedly connected with the rear upper supporting plate.

[0025] (III) Beneficial effects

[0026] The present invention provides a hallux valgus correction guide device, which has the following beneficial effects:

[0027] 1. The front metatarsal traction mechanism is rotatably mounted on the guide bracket, so that the traction needle inserted therein can swing to correct the problem of metatarsal rotation. At the same time, the setting of the rotation angle indicating mechanism can be used to measure the angular position of the traction needle before and after the swing, that is, to obtain the actual angle of metatarsal rotation correction, thereby improving the accuracy of metatarsal rotation correction;

[0028] 2. The first traction needle of the front metatarsal traction mechanism not only involves the operation of rotating the front metatarsal, but also involves operations such as lifting or swinging. This requires that the diameter of the hole through which the first traction needle of the front metatarsal traction mechanism passes must be larger than the diameter of the first traction needle, that is, to provide a certain operating space. The existence of this part of the operating space will cause the first traction needle to not rotate synchronously with the front metatarsal traction mechanism body in the initial stage of rotation, which will lead to measurement errors and affect the correction effect of metatarsal rotation. In the present invention, the clamping operation of the first traction needle is realized by setting a cap with a driving block and a pair of limit blocks, ensuring that the first traction needle and the front metatarsal traction mechanism body rotate synchronously, thereby ensuring the correction effect of metatarsal rotation.

[0029] 3. The cap is configured through a combination of buckles, slots and sliding unlocking blocks. It can be unlocked and switched between two vertical height positions by pressing and pulling, thereby realizing the clamping and releasing operations of the limit block, which is convenient for medical staff to use and operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle.

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention from a second viewing angle.

[0032] Figure 3 It is a schematic structural diagram of the front metatarsal traction mechanism, the front metatarsal transverse pushing mechanism and the rear metatarsal positioning mechanism of the present invention.

[0033] Figure 4 for Figure 3 Schematic diagram of the structure after partial enlargement of point A in the middle.

[0034] Figure 5 It is a schematic diagram of the top structure of the present invention.

[0035] Figure 6 yes Figure 5 A partial cross-sectional schematic diagram of the front end metatarsal traction mechanism along the section line CC when the limit block is in contact with the side wall of the upper step groove.

[0036] Figure 7 for Figure 5 A partial cross-sectional schematic diagram of the front metatarsal traction mechanism along the section line BB when the limit block is in contact with the side wall of the upper step groove.

[0037] Figure 8 It is a partial cross-sectional schematic diagram of the buckle portion of the cap in the present invention.

[0038] Fig. 9 yes Figure 5 A partial cross-sectional schematic diagram of the front metatarsal traction mechanism along the section line CC when the limiting block clamps the first traction needle.

[0039] Fig.10 for Figure 5 A partial cross-sectional schematic diagram of the front metatarsal traction mechanism along the section line BB when the limiting block clamps the first traction needle and the buckle of the cover cap is buckled with the lower clamping groove.

[0040] Fig.11 for Figure 5 A partial cross-sectional schematic diagram of the front metatarsal traction mechanism along the section line BB when the limiting block clamps the first traction needle and the buckle of the cap hooks the sliding unlocking block and moves upward.

[0041] Fig.12It is a structural schematic diagram of the rear end metatarsal positioning mechanism and the rotation angle indicating mechanism in the assembled state of the present invention.

[0042] Fig.13 It is a structural schematic diagram of the rear end metatarsal positioning mechanism and the rotation angle indicating mechanism in the explosion state of the present invention.

[0043] Fig.14 for Figure 5 A partial cross-sectional schematic diagram of the rear end metatarsal positioning mechanism along the section line BB when the pressing sleeve presses the pressing plate.

[0044] Fig.15 for Figure 5 A partial cross-sectional schematic diagram of the rear end metatarsal positioning mechanism along the section line BB when the pressure sleeve moves up and separates from the pressure plate.

[0045] Fig.16 It is a schematic structural diagram of the front metatarsal transverse pushing mechanism of the present invention in an assembled state.

[0046] Fig.17 It is a schematic structural diagram of the front metatarsal transverse pushing mechanism in the explosion state of the present invention.

[0047] In the figure:

[0048] 1. Guide bracket;

[0049] 11. Front panel;

[0050] 11a, arc-shaped guide groove;

[0051] 111, front upper support plate;

[0052] 1111, positioning sleeve;

[0053] 112, front lower support plate;

[0054] 12. Rear panel;

[0055] 121, rear upper support plate;

[0056] 1211, long guide groove;

[0057] 13. Beam;

[0058] 14. Rotating installation cavity;

[0059] 15. Waist-shaped step hole;

[0060] 2. Front metatarsal traction mechanism;

[0061] 21. The first traction needle;

[0062] 22. Blocked shots;

[0063] 221. Linear light source;

[0064] 222, center hole;

[0065] 223, driver block;

[0066] 224, connecting arm;

[0067] 225, elastic hinge;

[0068] 226, clamping part;

[0069] 2261, guiding inclined surface of the clamping portion;

[0070] 23. Main sleeve seat;

[0071] 231, upper card slot;

[0072] 2311, upper card slot guide slope;

[0073] 232, lower card slot;

[0074] 2321, first positioning groove;

[0075] 2331, step up slot;

[0076] 2332, lower step groove;

[0077] 233, axial perforation;

[0078] 234. Arc-shaped pivot block

[0079] 24. Limit block;

[0080] 241, rubber layer;

[0081] 25. Guide pillar;

[0082] 26. First spring;

[0083] 27. Slide to unlock the block;

[0084] 271, positioning unit;

[0085] 2711, upper unlocking block guide ramp;

[0086] 272, horizontal stripe body;

[0087] 2721, lower unlocking block guide ramp;

[0088] 28. Locking bolt;

[0089] 3. Front metatarsal transverse push mechanism;

[0090] 31. Horizontal push adjustment sleeve;

[0091] 311, lower support flange;

[0092] 32. Putting;

[0093] 321, threaded portion;

[0094] 322. Spline part;

[0095] 33. Push the frame body;

[0096] 34. Limit sleeve;

[0097] 4. Rear metatarsal positioning mechanism;

[0098] 41. Fixed hook;

[0099] 411, press plate;

[0100] 42. Press sleeve;

[0101] 421, waist-shaped sleeve body;

[0102] 422, upper limit flange;

[0103] 4221, ear;

[0104] 423, lower limit flange;

[0105] 424, press-fit flange;

[0106] 43. Second spring;

[0107] 44. U-shaped driving member;

[0108] 441, driving arm;

[0109] 4411, second positioning groove;

[0110] 44111, driving ramp;

[0111] 442, connection panel;

[0112] 4421, guide strip hole;

[0113] 42211, driven bump;

[0114] 45. Limit bolt;

[0115] 5. Rotation angle indicating mechanism;

[0116] 51. Angle scale panel;

[0117] 52. Panel fixing base;

[0118] 53. Position pointing device;

[0119] 6. Rear metatarsal traction and fixation mechanism;

[0120] 61. Second traction needle;

[0121] 62. Traction needle guide sleeve;

[0122] 63. Drill sleeve. DETAILED DESCRIPTION

[0123] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0124] Refer to the attached Figure 1-17 , a hallux valgus correction guide device, comprising a guide bracket 1, a front metatarsal traction mechanism 2, a front metatarsal transverse pushing mechanism 3 and a rotation angle indicating mechanism 5, wherein the front metatarsal traction mechanism 2 is rotatably installed in a rotation installation cavity 14 at the front end of the guide bracket 1 and can be locked and fixed by a locking member, the front metatarsal transverse pushing mechanism 3 and the rotation angle indicating mechanism 5 are respectively arranged at the front and rear sides of the front metatarsal traction mechanism 2, a pushing frame body 33 is provided at the lower end of a push rod 32 of the front metatarsal transverse pushing mechanism 3, the frame body of the pushing frame body 33 is rectangular ring-shaped and has a bend, the first traction needle 21 of the front metatarsal traction mechanism 2 can pass through the middle hollow part of the pushing frame body 33, so that the first traction needle 21 will not be interfered by the push rod when driving the front metatarsal to rotate, and at the same time, the frame body with a bend can still effectively contact with the front metatarsal after the front metatarsal rotates, and the rotation angle indicating mechanism 5 is used to display the angle position of the front metatarsal traction mechanism 2.

[0125] Among them, the required angle for correcting the rotation of the front metatarsal is calculated by taking a radiograph of the sole of the foot before surgery, which is an existing technology. In the traditional surgery to correct hallux valgus deformity, although this angle can be obtained in advance, the existing correction device cannot effectively measure the actual rotation angle of the front metatarsal during surgery. It is generally visually measured by medical staff, with poor accuracy, which affects the recurrence of hallux valgus.

[0126] In this embodiment, a pair of parallel and spaced panels are provided at the front end of the guide bracket 1, namely a front panel 11 and a rear panel 12, the rear panel 12 is connected to the guide bracket 1, the left and right sides of the front panel 11 and the rear panel 12 are respectively connected by a crossbeam 13 and enclosed to form a rotating installation cavity 14, the inner sides of the front panel 11 and the rear panel 12 are symmetrically provided with arc-shaped guide grooves 11a, a locking member is installed on the front panel 11, and the locking member is preferably a locking bolt 28, and at least one pair of the locking bolts 28 is threadedly connected to the front panel 11;

[0127] The front metatarsal traction mechanism 2 is provided with an arc-shaped pivot block 234 on the front and rear sides (specifically, the main sleeve seat 23 is provided with an arc-shaped pivot block 234 on the front and rear sides), and the arc-shaped pivot block 234 is slidably installed in the arc-shaped guide groove 11a, so that the front metatarsal traction mechanism 2 can rotate along the arc-shaped guide groove 11a.

[0128] In this embodiment, the rotation angle indicating mechanism 5 includes a position pointing member 53, an angle scale panel 51 and a panel fixing base 52. The position pointing member 53 is installed on the front metatarsal traction mechanism 2 and cooperates with the angle scale panel 51 to display the angle position of the front metatarsal traction mechanism 2 (or the first traction needle 21). The angle scale panel 51 is inserted and fixed on the panel fixing base 52, and the panel fixing base 52 is fixed on the guide bracket 1. The position pointing member 53 is a linear light source 221, which is specifically fixed to the side wall of the cap 22 and can emit a linear light beam perpendicular to the angle scale panel 51. The width of the linear light beam is preferably less than 1 mm. The main body of the angle scale panel 51 is made of transparent material, and scales and digital labels are printed on both sides. The light beam passes through the angle scale panel 51, which is convenient for medical staff at different positions in the front and back to observe. In order to reduce costs, the position pointing member 53 can also be selected as a pointer (not shown in the figure), the tail end of the pointer is mounted on and fixed on the cap 22 through a ring, and the front end of the pointer extends to one side of the angle scale panel 21 and points to the scale area of ​​the angle scale panel 51.

[0129] In this embodiment, the front metatarsal traction mechanism 2 includes a first traction needle 21, a cover cap 22, a main sleeve seat 23 and a limit block 24. A rubber strip 241 can be adhered to the inner side of the limit block 24 to reduce the wear on the first traction needle 21. The first traction needle 21 axially penetrates the center hole 222 of the cover cap 22 and the axial through hole 233 of the main sleeve seat 23 in sequence. The cover cap 22 is sleeved on the main sleeve seat 23. The top wall of the cover cap 22 extends downward to form a pair of drive blocks 223 that are arranged at intervals and parallel to the limit block 24. A pair of limit blocks 24 are slidably installed on the top of the main sleeve seat 23. The pair of limit blocks 24 are respectively arranged on both sides of the first traction needle 21. The drive block 223 and the limit block 24 are matched through an inclined surface. When the cover cap 22 is pressed down, the drive block 223 moves downward and drives the limit block 24 to move inward laterally to clamp the first traction needle 21. Specifically, the top of the main sleeve seat 23 is provided with an upper step groove 2331 and a lower step groove 2332 which are arranged from top to bottom and coaxial with its axial through hole 233. A pair of horizontally arranged guide pillars 25 are provided in the upper step groove 2331. The two ends of a pair of limit blocks 24 are respectively slidably mounted on the pair of guide pillars 25. The pair of guide pillars 25 are both sleeved with a first spring 26, and the two ends of the first spring 26 elastically abut against the pair of limit blocks 24.

[0130] Among them, at least one pair of buckles are arranged on the side wall of the cap 22, and the buckles include a connecting arm 224 and a clamping portion 226. The upper end of the connecting arm 224 is connected to the side wall of the cap 22 through an elastic hinge 225. The elastic hinge 225 is obtained by thinning the thickness of the connecting portion and the side wall of the cap 22. In other embodiments, the elastic hinge 225 can also be obtained by compounding other elastic materials with the connecting arm 224 and the side wall of the cap 22. The clamping portion 226 is integrally formed at the lower end of the connecting arm 224 and extends toward the inner side of the cap 22. The inner bottom of the clamping portion 226 is provided with a clamping portion guide inclined surface 2261. After the clamping portion 226 is subjected to force, the connecting arm 224 can be elastically flipped outward around the elastic hinge 225, so that the clamping portion 226 can be disengaged from the subsequent upper clamping groove 231 and the lower clamping groove 232.

[0131] The side wall of the main sleeve seat 23 is provided with a card slot combination corresponding to the card buckle one by one, and each card slot combination includes an upper card slot 231 and a lower card slot 232 arranged from top to bottom, and the lower edge of the upper card slot 231 is provided with an upper card slot guide inclined surface 2311, and the upper middle part of the lower card slot 232 extends upward to form a first positioning groove 2321, and a sliding unlocking block 27 that slides up and down is provided in the lower card slot 232. The sliding unlocking block 27 includes a horizontal bar body 272 and a positioning portion 271 located in the upper center of the horizontal bar body 272 and extending upward, the positioning portion 271 is provided with an upper unlocking block guiding inclined surface 2711, and the horizontal bar body 272 is provided with a lower unlocking block guiding inclined surface 2721. When the sliding unlocking block 27 slides upward, its positioning portion 271 can be embedded in the first positioning groove 2321 at the upper end convex part of the lower card slot 232, and the upper end surface of the horizontal bar body 272 can fit with the upper end surface of the lower card slot 232. The two sides of the horizontal bar body 272 are slidably inserted into the sliding grooves of the two side walls of the lower slot 232 through pins to prevent the sliding unlocking block 27 from falling out.

[0132] The pressing and pulling process of the cap 22 is as follows:

[0133] In the first stage, please refer to the attached Figure 3 , 6 , 7, 8, the buckle of the cover cap 22 is engaged with the upper step groove 2331, the driving block 223 does not press the limit block 24 downward, and the pair of limit blocks 24 are in a state of being separated from each other;

[0134] In the second stage, the medical staff presses down the cap 22, and the driving block 223 cooperates with the limit block 24 through the inclined surface, so that the limit block 24 moves inward. At the same time, the guide inclined surface 2261 of the clamping portion of the buckle and the upper clamping groove guide inclined surface 2311 of the upper clamping groove 231 interact with each other, so that the clamping portion 226 can be disengaged from the upper clamping groove 231, and the cap 22 continues to move downward until the buckle is engaged with the lower clamping groove 232. Fig. 9 , 10 At this time, a pair of limit blocks 24 clamp the first traction needle 21, and the driving block 223 fits with the outer end surface of the limit block 24;

[0135] In the third stage, the medical staff continues to press down the cap 22, and the lower step groove 2331 provides space to avoid interference when the driving block 223 moves downward. The guide slope 2261 of the clamping portion of the buckle and the upper unlocking block guide slope 2711 of the sliding unlocking block 27 cooperate with each other, so that the clamping portion 226 can pass over the positioning portion 271 and fall below the horizontal bar body 272. Then the medical staff lifts up the cap 22. Fig.11The clamping portion 226 presses against the lower unlocking block guide inclined surface 2721 and drives the sliding unlocking block 27 to be lifted up synchronously. When the positioning portion 271 of the sliding unlocking block 27 is embedded in the first positioning groove 2321 of the raised portion at the upper end of the lower slot 232, the upper end surface of the horizontal bar body 272 is fitted with the upper end surface of the lower slot 232, and the clamping portion 226 continues to move upward along the lower unlocking block guide inclined surface 2721 until it is restored to be engaged with the upper step groove 2331, and the sliding unlocking block 27 falls back to the bottom of the lower slot 232 under the action of its own weight.

[0136] In addition, a third spring can be installed in the cap 22 to ensure the effective engagement of the buckle with the upper step groove 2331, and a fourth spring can be installed on the sliding unlocking block 27 to ensure that the sliding unlocking block 27 is reset downward, and a limit screw can be installed that penetrates the cap 22 from top to bottom and is connected to the main sleeve seat 23 to prevent the cap 22 from falling out, thereby improving the reliability of the device.

[0137] In this embodiment, the front metatarsal transverse pushing mechanism 3 includes a transverse pushing adjustment sleeve 31 and a limiting sleeve 34. The front panel 11 of the guide bracket 1 is protruding outward and is provided with a pair of front upper support plates 111 and front lower support plates 112 spaced from top to bottom. The front upper support plate 111 is provided with a positioning sleeve 1111 extending upward. The lower part of the transverse pushing adjustment sleeve 31 is inserted into the positioning sleeve 1111. The limiting sleeve 34 is sleeved on the transverse pushing adjustment sleeve 31 and the positioning sleeve 1111. The limiting sleeve 34 is threadedly matched with the positioning sleeve 1111 and limits the lower support flange 311 at the lower end of the horizontal push adjustment sleeve 31. The rod body of the push rod 32 is provided with a threaded portion 321 and a spline portion 322 distributed from top to bottom. The threaded portion 321 penetrates the front upper support plate 111 and the positioning sleeve 1111 and then is threadedly matched with the horizontal push adjustment sleeve 31. The spline portion 322 is matched with the spline hole on the front lower support plate 112. The horizontal push adjustment sleeve 31 is threadedly matched with the push rod 32, and the push rod 32 is limited by the spline structure with the front lower support plate 112. When the medical staff rotates the horizontal push adjustment sleeve 31, the push rod 32 moves up and down, making the horizontal push operation of the front metatarsal very convenient.

[0138] In this embodiment, the device also includes a rear end metatarsal positioning mechanism 4, which includes a fixing hook 41, a pressing sleeve 42 and a second spring 43. A pressure plate 411 is fixed to the middle area of ​​the rod-shaped body of the fixing hook 41. A waist-shaped step hole 15 is opened on the guide bracket 1. The pressure plate 411 is slidably installed in the waist-shaped step hole 15. The pressing sleeve 42 is sleeved on the outside of the rod-shaped body of the fixing hook 41 and penetrates downwardly through the rear upper support plate 121 of the guide bracket 1. The second spring 43 is sleeved on the pressing sleeve 42 and elastically presses the pressing sleeve 42 downward onto the pressure plate 411. Specifically, the upper end of the waist-shaped sleeve body 421 of the press sleeve 42 is detachably mounted with an upper limit flange 422, the lower part thereof is provided with a lower limit flange 423 protruding outward, and the bottom thereof is provided with a press-fit flange 424 protruding downward. The upper limit flange 422 and the lower limit flange 423 are respectively arranged on the upper and lower sides of the rear upper support plate 121, and the two ends of the second spring 43 respectively abut against the lower limit flange 423 and the rear upper support plate 121, and the press-fit flange 424 is annular and is used to press the press plate 411. Among them, the press plate 411 and the hook at the end of the fixing hook 41 can both pass through the waist-shaped sleeve body 421, and at the same time, the press plate 411 is vertically arranged with the hook at the end of the fixing hook 41. After the press plate 411 passes through the waist-shaped sleeve body 421, the fixing hook 41 is rotated so that the two ends of the press plate 411 abut against the step surface of the waist-shaped step hole 15 and are pressed by the press sleeve. The length of the pressing plate 411 is slightly smaller than the width of the waist-shaped step hole 15, so that the pressing plate 411 can rotate in the waist-shaped step hole 15 to adjust the angle of the hook at the end of the fixing hook 41 to fit the medullary cavity of the rear metatarsal.

[0139] Preferably, the rear metatarsal positioning mechanism 4 includes a U-shaped driving member 44. The U-shaped driving member 44 includes a connecting panel 442 and driving arms 441 disposed on the left and right sides of the connecting panel 442 and extending in the front and rear directions. The driving arms 441 are slidably mounted in the long strip guide grooves 1211 at the upper end of the rear upper support plate 121. A second positioning groove 4411 is formed at the end of the driving arm 441, and a driving inclined surface 44111 is formed at the end of the second positioning groove 4411. Ears 4221 extend outward from the left and right sides of the upper limit flange 422, and driven bumps 42211 extending downward are provided on the ears 4221. The driven block 223 cooperates with the driving inclined surface 44111 of the second positioning groove 4411. Medical staff only need to pinch the pull ring at the end of the U-shaped driving member 44 and push the U-shaped driving member 44 inward. The driving arm 441 can move past the lower part of the ear 4221, and the driven bump 42211 extends into the second positioning groove 4411 and cooperates with the driving inclined surface 44111 to drive the pressure sleeve 42 to lift upward, releasing the pressing on the pressing plate 411. The fixing hook 41 can then be translated, so that the hook at the end of the fixing hook 41 can be inserted into or withdrawn from the medullary cavity. During the translation process of the fixing hook 41 by medical staff, the pressure sleeve 42 overcomes the elastic force of the second spring 43 and remains in the lifted state under the action of the U-shaped driving member 44. That is to say, it is not necessary for medical staff to hold the pressure sleeve 42 by hand anymore, making the translation operation of the fixing hook 41 very convenient.

[0140] In addition, a guiding long strip hole 4421 parallel to the driving arm 441 is formed on the connecting panel 442. A limit bolt 45 passes through the guiding long strip hole 4421 and is threadedly connected to the rear upper support plate 121. The arrangement of the guiding long strip hole 4421 and the limit bolt 45 can limit the U-shaped driving member 44 on the rear upper support plate 121 and prevent the U-shaped driving member 44 from falling during the pushing process, improving the reliability of the device.

[0141] Refer to the attached Figure 1 、 2 As shown in the figure, the rear metatarsal traction and fixation mechanism 6 of the device includes a drill sleeve 63, a traction needle guide sleeve 62, and a second traction needle 61. The drill sleeve 63 is inserted into the stepped convex part at the rear end of the guide bracket 1, and the traction needle guide sleeve 62 and the second traction needle 61 are sequentially inserted into the drill sleeve 63 from outside to inside. In some embodiments, the stepped convex part can also be set as the slidable and adjustable structure in Patent 202211080334.5, or the stepped convex part can be set as the rotatable and adjustable structure to adjust the insertion angle of the second traction needle 61.

[0142] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0143] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hallux valgus correction guide device, characterized in that: It includes a guide bracket, a front metatarsal traction mechanism, a front metatarsal transverse pushing mechanism and a rotation angle indicating mechanism. The front metatarsal traction mechanism is rotatably installed in the rotation installation cavity at the front end of the guide bracket and can be locked and fixed by a locking member. The front metatarsal transverse pushing mechanism and the rotation angle indicating mechanism are respectively arranged on the front and rear sides of the front metatarsal traction mechanism. A pushing frame body is arranged at the lower end of a push rod of the front metatarsal transverse pushing mechanism. The first traction needle of the front metatarsal traction mechanism can pass through the middle hollow part of the pushing frame body. The rotation angle indicating mechanism is used to display the angular position of the front metatarsal traction mechanism.

2. A hallux valgus correction guide device as claimed in claim 1, characterized in that: A pair of parallel and spaced panels are provided at the front end of the guide bracket, which are a front panel and a rear panel. The front panel and the rear panel are connected by a crossbeam on both sides and enclosed to form a rotating installation cavity. The inner sides of the front panel and the rear panel are symmetrically provided with arc-shaped guide grooves. A locking piece is installed on the front panel, and the rear panel is connected to the guide bracket; The front metatarsal traction mechanism is provided with arc-shaped pivot blocks at the front and rear sides, and the arc-shaped pivot blocks are slidably installed in the arc-shaped guide groove, so that the front metatarsal traction mechanism can rotate along the arc-shaped guide groove.

3. A hallux valgus correction guide device as claimed in claim 2, characterized in that: The rotation angle indicating mechanism includes a position pointing piece, an angle scale panel and a panel fixing base. The position pointing piece is installed on the front metatarsal traction mechanism and cooperates with the angle scale panel to display the angle position of the front metatarsal traction mechanism. The angle scale panel is inserted and fixed on the panel fixing base, and the panel fixing base is fixed on the guide bracket.

4. A hallux valgus correction guide device as claimed in claim 2, characterized in that: The front end metatarsal traction mechanism includes a first traction needle, a cap, a main sleeve seat and a limit block. The first traction needle axially penetrates the cap and the main sleeve seat in sequence. The cap is sleeved on the main sleeve seat. The top wall of the cap extends downward to form a pair of drive blocks arranged at intervals. A pair of limit blocks are slidably installed on the top of the main sleeve seat. The pair of limit blocks are respectively arranged on both sides of the first traction needle. The drive block and the limit block are matched through an inclined surface. When the cap is pressed down, the drive block moves downward and drives the limit block to move horizontally to clamp the first traction needle.

5. A hallux valgus correction guide device as claimed in claim 4, characterized in that: At least one pair of buckles is provided on the side wall of the cap, and the buckles include a connecting arm and a clamping portion, the upper end of the connecting arm is connected to the side wall of the cap through an elastic hinge portion, the clamping portion is integrally formed at the lower end of the connecting arm and extends toward the inner side of the cap, and the inner bottom of the clamping portion is provided with a clamping portion guide inclined surface; A card slot combination corresponding to the buckles is provided on the side wall of the main sleeve seat, and each card slot combination includes an upper card slot and a lower card slot arranged from top to bottom, and an upper card slot guide inclined surface is provided at the lower edge of the upper card slot, and a first positioning slot is formed by extending upward in the middle of the upper part of the lower card slot, and a sliding unlocking block that slides up and down is provided in the lower card slot, and the sliding unlocking block includes a horizontal bar body and a positioning portion located in the upper center of the horizontal bar body and extending upward, the positioning portion is provided with an upper unlocking block guide inclined surface, and the horizontal bar body is provided with a lower unlocking block guide inclined surface, and when the sliding unlocking block slides upward, its positioning portion can be embedded in the first positioning slot at the raised part of the upper end of the lower card slot, and the upper end surface of the horizontal bar body can fit with the upper end surface of the lower card slot.

6. A hallux valgus correction guide device as claimed in claim 2, characterized in that: The front end metatarsal transverse pushing mechanism includes a transverse pushing adjustment sleeve and a limiting sleeve. The front panel of the guide bracket protrudes outwardly and is provided with a pair of front upper support plates and front lower support plates spaced from top to bottom. The front upper support plate is provided with a positioning sleeve extending upward. The lower part of the transverse pushing adjustment sleeve is inserted in the positioning sleeve. The limiting sleeve is sleeved between the transverse pushing adjustment sleeve and the positioning sleeve. The limiting sleeve is threadedly matched with the positioning sleeve and limits the lower supporting flange at the lower end of the transverse pushing adjustment sleeve. The rod body of the push rod is provided with a threaded portion and a spline portion distributed from top to bottom. The threaded portion passes through the front upper support plate and the positioning sleeve and then is threadedly matched with the transverse pushing adjustment sleeve. The spline portion is matched with the spline hole on the front lower support plate.

7. A hallux valgus correction guide device as claimed in claim 2, characterized in that: The device also includes a rear end metatarsal positioning mechanism, which includes a fixing hook, a pressure sleeve and a second spring. A pressure plate is fixed to the middle area of ​​the rod-shaped body of the fixing hook. A waist-shaped step hole is opened on the guide bracket. The pressure plate is slidably installed in the waist-shaped step hole. The pressure sleeve is sleeved on the outside of the rod-shaped body of the fixing hook and penetrates downwardly through the rear upper support plate of the guide bracket. The second spring is sleeved on the pressure sleeve and elastically presses the pressure sleeve downward onto the pressure plate.

8. A hallux valgus correction guide device as claimed in claim 7, characterized in that: The upper end of the waist-shaped sleeve body of the press sleeve is detachably installed with an upper limit flange, the lower part thereof is protruding outwardly with a lower limit flange, and the bottom thereof is protruding downwardly with a press-fitting flange, the upper limit flange and the lower limit flange are respectively arranged on the upper and lower sides of the rear upper support plate, the two ends of the second spring respectively abut against the lower limit flange and the rear upper support plate, and the press-fitting flange is annular and is used for press-fitting the pressure plate.

9. A hallux valgus correction guide device as claimed in claim 8, characterized in that: The rear end metatarsal positioning mechanism includes a U-shaped driving component, which includes a connecting panel, a driving arm arranged on the left and right sides of the connecting panel and extending in the front-to-back direction, and the left and right sides of the upper limit flange extend outward to form ears. The driving arm and the ear cooperate through an inclined surface to drive the pressure sleeve to lift upward.

10. A hallux valgus correction guide device as claimed in claim 9, characterized in that: The driving arm is slidably mounted in the long guide groove on the upper end of the rear upper support plate, a second positioning groove is formed at the end of the driving arm, a driving inclined surface is formed at the end of the second positioning groove, and a driven protrusion extending downward is provided on the ear portion, and the driven protrusion can extend into the second positioning groove and cooperate with the driving inclined surface; The connecting panel is provided with a long guide hole parallel to the driving arm, and the limiting bolt passes through the long guide hole and is threadedly connected with the rear upper supporting plate.

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