A hallux valgus correction guide

Abstract

The present application relates to the technical field of surgical instruments, and provides a hallux valgus correction guiding device, which further solves the problem of metatarsal bone rotation on the basis of meeting the demand of traditional internal pushing and metatarsal bone fixing. The device comprises a guider support, a front-end metatarsal bone traction mechanism, a front-end metatarsal bone horizontal pushing mechanism and a rotation angle indicating mechanism, the front-end metatarsal bone traction mechanism is rotatably installed in a rotating installation cavity at the front end of the guider support and can be locked and fixed by a locking piece, the front-end metatarsal bone horizontal pushing mechanism and the rotation angle indicating mechanism are arranged on the front and back sides of the front-end metatarsal bone traction mechanism, the lower end of a push rod of the front-end metatarsal bone horizontal pushing mechanism is provided with a push frame main body, a first traction needle of the front-end metatarsal bone traction mechanism can pass through the middle hollow part of the push frame main 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] This invention relates to the field of surgical instrument technology, and specifically to a hallux valgus correction guide device. Background Technology

[0002] The incidence of hallux valgus is approximately 15%, more common in central China and slightly lower in coastal areas. Based on my country's population of 1.4 billion, there are approximately 200 million hallux valgus patients in China, with women making up the majority, accounting for 20-30%. Hallux valgus is a common foot condition that causes the large, flared shape of the foot. Current surgical correction of hallux valgus involves an osteotomy 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 using a minimally invasive technique.

[0003] The inventor participated in the development of a prior patent application with patent number 202211080334.5, entitled "A Hallux Valgus Correction Guiding Device and Correction Method." This patent allows for the simultaneous holding of the guide bracket and adjustment of the guide slider's position, making hallux valgus surgery more precise. However, actual surgeries and research have revealed that hallux valgus deformity not only involves the valgus of the foot but is also often accompanied by metatarsal rotation. Therefore, after conventional osteotomy, medial reduction, bone shaving, and fixation correction, metatarsal rotation often leads to hallux valgus recurrence.

[0004] Therefore, we propose a hallux valgus correction guide device. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a hallux valgus correction guide device that overcomes the deficiencies of existing technologies. It is reasonably designed and easy to use, and further solves the problem of metatarsal rotation while meeting the basic requirements of traditional inward pushing and fixing of the metatarsals.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[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. The front metatarsal traction mechanism is rotatably mounted in the rotation mounting 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 disposed on the front and rear sides of the front metatarsal traction mechanism. The lower end of the push rod of the front metatarsal transverse pushing mechanism is provided with a push frame body. The first traction pin of the front metatarsal traction mechanism can pass through the middle hollow of the push frame body. The rotation angle indicating mechanism is used to display the angular position of the front metatarsal traction mechanism.

[0010] Furthermore, the front end of the guide bracket is provided with a pair of parallel and spaced panels, namely a front panel and a rear panel. The front panel and the rear panel are connected by a crossbeam and enclosed to form a rotating mounting cavity. The inner sides of the front panel and the rear panel are symmetrically provided with arc-shaped guide grooves. A locking component 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 on both the front and rear sides. 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 component, an angle scale panel, and a panel fixing base. The position pointing component 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 component is a linear light source, which is fixed to the side wall of the cap and can emit a linear beam perpendicular to the angle scale panel. The width of the linear beam is preferably less than 1 mm.

[0014] Alternatively, the position indicator is a pointer, the tail end of which is fitted and fixed to the cap by a collar, and the front end of which points to the angle scale panel.

[0015] Furthermore, the anterior metatarsal traction mechanism includes a first traction pin, a cap, a main sleeve seat, and a limiting block. The first traction pin passes through the cap and the main sleeve seat in sequence along the axial direction. The cap is sleeved on the main sleeve seat. The top wall of the cap extends downward to form a pair of spaced-apart driving blocks. A pair of limiting blocks are slidably installed on the top of the main sleeve seat. The pair of limiting blocks are respectively located on both sides of the first traction pin. The driving block and the limiting block are engaged by inclined surfaces. When the cap is pressed down, the driving block moves down and drives the limiting block to move laterally to clamp the first traction pin.

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

[0017] Furthermore, at least one pair of buckles are provided on the side wall of the cap. Each buckle includes a connecting arm and a snap-fit ​​part. The upper end of the connecting arm is connected to the side wall of the cap through an elastic hinge part. The snap-fit ​​part is integrally formed on the lower end of the connecting arm and extends toward the inside of the cap. The bottom of the inner side of the snap-fit ​​part is provided with a snap-fit ​​part guide slope.

[0018] The main sleeve seat has a set of slots on its side wall that correspond one-to-one with the buckle. Each slot set includes an upper slot and a lower slot arranged from top to bottom. The lower edge of the upper slot has an upper slot guide slope. The upper middle of the lower slot extends upward to form a first positioning groove. The lower slot has a sliding unlocking block that slides up and down. The sliding unlocking block includes a horizontal bar body and a positioning part located at the upper center of the horizontal bar body and extending upward. The positioning part has an upper unlocking block guide slope, and the horizontal bar body has a lower unlocking block guide slope. When the sliding unlocking block slides upward, its positioning part can be embedded in the first positioning groove of the upper protrusion of the lower slot, and the upper end face of the horizontal bar body can fit against the upper end face of the lower slot.

[0019] Furthermore, the anterior metatarsal transverse thrust mechanism includes a transverse thrust adjustment sleeve and a limiting sleeve. The front panel of the guide bracket has a pair of upper front support plates and lower front support plates that are spaced apart from top to bottom. The upper front support plate has an upwardly extending positioning sleeve. The lower part of the transverse thrust adjustment sleeve is inserted into the positioning sleeve. The limiting sleeve is sleeved between the transverse thrust adjustment sleeve and the positioning sleeve. The limiting sleeve is threadedly engaged with the positioning sleeve and limits the lower support flange at the lower end of the transverse thrust adjustment sleeve. The push rod has a threaded part and a splined part distributed from top to bottom. The threaded part passes through the upper front support plate and the positioning sleeve and is threadedly engaged with the transverse thrust adjustment sleeve. The splined part is engaged with the splined hole on the lower front support plate.

[0020] Furthermore, the device also includes a rear 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 main body of the fixing hook. A waist-shaped stepped hole is opened on the guide bracket. The pressure plate is slidably installed in the waist-shaped stepped hole. The pressure sleeve is sleeved on the rod-shaped main body of the fixing hook and passes downward 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 pressure sleeve is detachably equipped with an upper limit flange, the lower part of which is provided with a lower limit flange protruding outward, and the bottom of which is provided with a pressing flange protruding downward. The upper limit flange and the lower limit flange are respectively located on the upper and lower sides of the rear upper support plate. The two ends of the second spring abut against the lower limit flange and the rear upper support plate respectively. The pressing flange is annular and is used to press the pressure plate.

[0022] Furthermore, the rear metatarsal positioning mechanism includes a U-shaped drive component, which includes a connecting panel, drive arms disposed on the left and right sides of the connecting panel and extending in the front-back direction, and the left and right sides of the upper limit flange extending outward to form an ear. The drive arms and the ear are engaged by a bevel to drive the pressure sleeve to lift upward.

[0023] Specifically, the drive arm is slidably mounted in the long guide groove at the upper end of the rear upper support plate, the end of the drive arm is formed with a second positioning groove, the end of the second positioning groove is formed with a drive slope, and the ear is provided with a downwardly extending driven protrusion, which can extend into the second positioning groove and cooperate with the drive slope.

[0024] The connecting panel has a guide strip hole parallel to the drive arm, and the limiting bolt passes through the guide strip hole and is threaded to the rear upper support plate.

[0025] (III) Beneficial Effects

[0026] This 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, allowing the traction pin inserted inside to swing to correct the problem of metatarsal rotation. At the same time, the rotation angle indicator mechanism can be used to measure the angle position of the traction pin before and after swinging, that is, to obtain the actual angle of metatarsal rotation correction, thereby improving the accuracy of metatarsal rotation correction.

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

[0029] 3. The cap is designed with a combination of buckles, slots and sliding unlocking blocks, which can be switched between two vertical height positions by pressing and pulling to achieve the clamping and releasing of the limit block, making it convenient for medical staff to use. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram from a first perspective of the present invention.

[0031] Figure 2 This is a three-dimensional structural schematic diagram of the invention from a second perspective.

[0032] Figure 3 This is a schematic 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 A magnified structural diagram of point A in the middle.

[0034] Figure 5 This is a top view of the structure of the present invention.

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

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

[0037] Figure 8 This is a partial cross-sectional view of the snap-on portion of the cap in this invention.

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

[0039] Figure 10 for Figure 5 A partial sectional view along section line BB of the front metatarsal traction mechanism when the limiting block clamps the first traction pin and the cap's buckle engages with the lower slot.

[0040] Figure 11 for Figure 5 A partial sectional view along section line BB of the front metatarsal traction mechanism in the middle when the limiting block clamps the first traction pin and the cap's buckle hooks the sliding unlocking block and moves upward.

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

[0042] Figure 13 This is a schematic diagram of the rear metatarsal positioning mechanism and rotation angle indicating mechanism in the explosive state of the present invention.

[0043] Figure 14 for Figure 5 A partial cross-sectional view along section line BB of the rear metatarsal positioning mechanism when the pressure sleeve presses down on the pressure plate.

[0044] Figure 15 for Figure 5 A partial cross-sectional view along section line BB of the rear metatarsal positioning mechanism as the pressure sleeve moves upward and disengages from the pressure plate.

[0045] Figure 16 This is a schematic diagram of the front metatarsal transverse push mechanism of the present invention in its assembled state.

[0046] Figure 17 This is a schematic diagram of the front metatarsal transverse thrust mechanism of the present invention in an explosive state.

[0047] In the picture:

[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. Crossbeam;

[0058] 14. Rotary mounting cavity;

[0059] 15. Waist-shaped stepped hole;

[0060] 2. Anterior metatarsal traction mechanism;

[0061] 21. First traction needle;

[0062] 22. Cap;

[0063] 221. Linear light source;

[0064] 222. Center hole;

[0065] 223. Driver block;

[0066] 224. Connecting arm;

[0067] 225. Flexible hinge;

[0068] 226. Connecting part;

[0069] 2261. Guide slope of the snap-fit ​​part;

[0070] 23. Main sleeve seat;

[0071] 231. Upper card slot;

[0072] 2311. Upper slot guide slope;

[0073] 232. Lower card slot;

[0074] 2321. First positioning slot;

[0075] 2331. Upper step groove;

[0076] 2332. Lower step groove;

[0077] 233. Piercing the shaft;

[0078] 234. Arc-shaped pivot block

[0079] 24. Limit block;

[0080] 241. Rubber pressure strip;

[0081] 25. Guide post;

[0082] 26. The first spring;

[0083] 27. Slide to unlock the block;

[0084] 271. Positioning section;

[0085] 2711. Upper unlocking block guide ramp;

[0086] 272. Main horizontal bar;

[0087] 2721. Lower unlock block guide ramp;

[0088] 28. Locking bolts;

[0089] 3. Anterior metatarsal transverse thrust mechanism;

[0090] 31. Horizontal push adjusting sleeve;

[0091] 311. Lower support flange;

[0092] 32. Push rod;

[0093] 321. Threaded section;

[0094] 322. Spline part;

[0095] 33. Push the main body of the frame;

[0096] 34. Limiting sleeve;

[0097] 4. Rear metatarsal positioning mechanism;

[0098] 41. Fixing hook;

[0099] 411. Pressure plate;

[0100] 42. Pressure sleeve;

[0101] 421. Waist-shaped sleeve body;

[0102] 422. Upper limit flange;

[0103] 4221. Ears;

[0104] 423. Lower limit flange;

[0105] 424. Press-fit flange;

[0106] 43. The second spring;

[0107] 44. U-shaped drive component;

[0108] 441. Drive arm;

[0109] 4411, Second positioning groove;

[0110] 44111, Driving inclined plane;

[0111] 442. Connection panel;

[0112] 4421. Guide elongated hole;

[0113] 42211, Driven bump;

[0114] 45. Limit bolts;

[0115] 5. Rotation angle indicating mechanism;

[0116] 51. Angle scale panel;

[0117] 52. Panel mounting base;

[0118] 53. Position pointing component;

[0119] 6. Rear metatarsal traction fixation mechanism;

[0120] 61. Second traction needle;

[0121] 62. Traction needle guide sleeve;

[0122] 63. Drill bushing. Detailed Implementation

[0123] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0124] See attached document Figure 1-17 A hallux valgus correction guide device includes a guide bracket 1, an anterior metatarsal traction mechanism 2, an anterior metatarsal transverse pushing mechanism 3, and a rotation angle indicating mechanism 5. The anterior metatarsal traction mechanism 2 is rotatably mounted in the rotation mounting cavity 14 at the front end of the guide bracket 1 and can be locked and fixed by a locking member. The anterior metatarsal transverse pushing mechanism 3 and the rotation angle indicating mechanism 5 are respectively located on the front and rear sides of the anterior metatarsal traction mechanism 2. The push rod 32 of the anterior metatarsal transverse pushing mechanism 3 has a push frame body 33 at its lower end. The frame of the push frame body 33 is rectangular and curved. The first traction pin 21 of the anterior metatarsal traction mechanism 2 can pass through the middle hollow of the push frame body 33, so that the first traction pin 21 will not be interfered with by the push rod when driving the anterior metatarsal to rotate. At the same time, the curved frame can still effectively contact the anterior metatarsal after the anterior metatarsal rotates. The rotation angle indicating mechanism 5 is used to display the angular position of the anterior metatarsal traction mechanism 2.

[0125] The required angle for correcting the rotation of the anterior metatarsal bones is calculated preoperatively using X-rays of the foot, which is the current technology. While this angle can be obtained in advance during traditional hallux valgus correction surgery, existing corrective devices cannot effectively measure the actual rotation angle of the anterior metatarsal bones during surgery. It is generally determined visually by medical staff, which has poor accuracy and affects the recurrence of hallux valgus.

[0126] In this embodiment, the front end of the guide bracket 1 is provided with a pair of parallel and spaced panels, 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 connected by a crossbeam 13 and enclosed to form a rotating mounting 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 component is installed on the front panel 11. The locking component is preferably a locking bolt 28. At least one pair of the locking bolts 28 are threadedly connected to the front panel 11.

[0127] The front metatarsal traction mechanism 2 is provided with arc-shaped pivot blocks 234 on both the front and rear sides (specifically, the main sleeve seat 23 is provided with arc-shaped pivot blocks 234 on both the front and rear sides). The arc-shaped pivot blocks 234 are 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 pointer 53, an angle scale panel 51, and a panel fixing base 52. The position pointer 53 is mounted on the front metatarsal traction mechanism 2 and cooperates with the angle scale panel 51 to display the angular position of the front metatarsal traction mechanism 2 (or the first traction pin 21). The angle scale panel 51 is inserted and fixed to the panel fixing base 52, and the panel fixing base 52 is fixed to the guide bracket 1. The position pointer 53 is a linear light source 221, which is specifically fixed to the side wall of the cap 22 and can emit a linear beam perpendicular to the angle scale panel 51. The width of the linear beam is preferably less than 1 mm. The angle scale panel 51 is mainly made of transparent material, with scales and numerical markings printed on both sides. The beam passes through the angle scale panel 51, making it convenient for medical personnel at different positions to observe. To reduce costs, the position indicator 53 can also be selected as a pointer (not shown in the figure). The tail end of the pointer is fitted and fixed to the cap 22 by a collar, and the front end of the pointer extends toward the angle scale panel 21 and points to the scale area of ​​the angle scale panel 51.

[0129] In this embodiment, the anterior metatarsal traction mechanism 2 includes a first traction pin 21, a cap 22, a main sleeve seat 23, and a limiting block 24. A rubber strip 241 can be glued to the inner side of the limiting block 24 to reduce wear on the first traction pin 21. The first traction pin 21 passes through the central hole 222 of the cap 22 and the axial through hole 233 of the main sleeve seat 23 in sequence along the axial direction. The cap 22 is sleeved on the main sleeve seat 23. The top wall of the cap 22 extends downward to form a pair of spaced-apart driving blocks 223 parallel to the limiting block 24. A pair of limiting blocks 24 are slidably installed on the top of the main sleeve seat 23. The pair of limiting blocks 24 are respectively located on both sides of the first traction pin 21. The driving block 223 and the limiting block 24 are engaged by inclined surfaces. When the cap 22 is pressed down, the driving block 223 moves down and drives the limiting block 24 to move inward laterally to clamp the first traction pin 21. Specifically, the top of the main sleeve seat 23 is provided with an upper step groove 2331 and a lower step groove 2332 arranged from top to bottom and coaxial with its axial through hole 233. The upper step groove 2331 is provided with a pair of horizontally arranged guide posts 25. The two ends of the pair of limiting blocks 24 are respectively slidably sleeved on the pair of guide posts 25. A first spring 26 is sleeved on each pair of guide posts 25. The two ends of the first spring 26 elastically abut against the pair of limiting blocks 24.

[0130] The cap 22 has at least one pair of buckles on its side wall. Each buckle includes a connecting arm 224 and a snap-fit ​​part 226. The upper end of the connecting arm 224 is connected to the side wall of the cap 22 via an elastic hinge part 225. The elastic hinge part 225 is obtained by thinning the thickness of the connection between the connecting part and the side wall of the cap 22. In other embodiments, the elastic hinge part 225 can also be obtained by combining other elastic materials with the connecting arm 224 and the side wall of the cap 22. The snap-fit ​​part 226 is integrally formed on the lower end of the connecting arm 224 and extends toward the inside of the cap 22. The bottom of the inner side of the snap-fit ​​part 226 is provided with a snap-fit ​​part guide slope 2261. When the snap-fit ​​part 226 is subjected to force, the connecting arm 224 can elastically rotate outward around the elastic hinge part 225, thereby allowing the snap-fit ​​part 226 to disengage from the subsequent upper snap-fit ​​groove 231 and lower snap-fit ​​groove 232.

[0131] The main sleeve seat 23 has a set of slots on its side wall that correspond one-to-one with the buckle. Each slot set includes an upper slot 231 and a lower slot 232 arranged from top to bottom. The lower edge of the upper slot 231 is provided with an upper slot guide slope 2311. The upper middle of the lower slot 232 extends upward to form a first positioning groove 2321. The lower slot 232 is provided with a sliding unlocking block 27 that slides up and down. The sliding unlocking block 27 includes a horizontal bar body 272 and a positioning part 271 located at the upper center of the horizontal bar body 272 and extending upward. The positioning part 271 is provided with an upper unlocking block guide slope 2711, and the horizontal bar body 272 is provided with a lower unlocking block guide slope 2721. When the sliding unlocking block 27 slides upward, its positioning part 271 can be embedded in the first positioning groove 2321 of the upper protrusion of the lower slot 232, and the upper end surface of the horizontal bar body 272 can fit against the upper end surface of the lower slot 232. The horizontal bar body 272 is slidably inserted into the grooves on both sides of the lower slot 232 by pins to prevent the sliding unlocking block 27 from coming out.

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

[0133] Phase 1, refer to Appendix Figure 3 , 6 7, 8, the buckle of the cap 22 engages with the upper step groove 2331, the drive block 223 does not press down the limiting block 24, and the pair of limiting blocks 24 are in a state of separation from each other;

[0134] In the second stage, medical staff press down on the cap 22. The driving block 223 and the limiting block 24 engage through inclined surfaces, causing the limiting block 24 to move inward. Simultaneously, the guide inclined surface 2261 of the latching part and the guide inclined surface 2311 of the upper slot 231 interact, allowing the latching part 226 to disengage from the upper slot 231. The cap 22 continues to descend until the latch engages with the lower slot 232. (Refer to the attached diagram.) Figure 9 , 10 At this time, a pair of limiting blocks 24 clamp the first traction needle 21, and the driving block 223 is in contact with the outer end face of the limiting block 24;

[0135] In the third stage, medical staff continue to press down the cap 22. The lower step groove 2331 provides space to prevent interference when the drive block 223 moves down. The guide slope 2261 of the latch and the guide slope 2711 of the upper unlocking block of the sliding unlocking block 27 cooperate with each other, allowing the latch 226 to pass over the positioning part 271 and fall below the horizontal bar body 272. Then, the medical staff lift the cap 22, referring to the attached... Figure 11The engaging part 226 abuts against the guide slope 2721 of the lower unlocking block and drives the sliding unlocking block 27 to rise synchronously. When the positioning part 271 of the sliding unlocking block 27 is embedded in the first positioning groove 2321 of the upper protrusion of the lower slot 232, and the upper end surface of the horizontal bar body 272 is in contact with the upper end surface of the lower slot 232, the engaging part 226 continues to move upward along the guide slope 2721 of the lower unlocking block until it is engaged with the upper step groove 2331 again, and the sliding unlocking block 27 falls back to the bottom of the lower slot 232 under its own weight.

[0136] In addition, a third spring can be installed inside the cap 22 to ensure that the buckle effectively engages with the upper step groove 2331, a fourth spring can be installed on the sliding unlocking block 27 to ensure that the sliding unlocking block 27 returns to its downward position, and a limiting screw can be installed that passes through the cap 22 from top to bottom and connects to the main sleeve seat 23 to prevent the cap 22 from coming off and improve the reliability of the device.

[0137] In this embodiment, the anterior metatarsal transverse thrust mechanism 3 includes a transverse thrust adjustment sleeve 31 and a limiting sleeve 34. The front panel 11 of the guide bracket 1 has a pair of front upper support plates 111 and front lower support plates 112 that are spaced apart from top to bottom. The front upper support plate 111 has an upwardly extending positioning sleeve 1111. The lower part of the transverse thrust adjustment sleeve 31 is inserted into the positioning sleeve 1111. The limiting sleeve 34 is sleeved on the transverse thrust adjustment sleeve 31 and the positioning sleeve 1111. Between the sleeves 1111, the limiting sleeve 34 is threadedly engaged with the positioning sleeve 1111 and limits the lower support flange 311 at the lower end of the transverse push adjusting sleeve 31. The push rod 32 has a threaded portion 321 and a splined portion 322 distributed from top to bottom on its body. The threaded portion 321 passes through the upper front support plate 111 and the positioning sleeve 1111 and then is threadedly engaged with the transverse push adjusting sleeve 31. The splined portion 322 engages with the splined hole on the lower front support plate 112. The transverse push adjusting sleeve 31 is threadedly engaged with the push rod 32, and the push rod 32 is limited by the splined structure with the lower front support plate 112. When medical staff rotate the transverse push adjusting sleeve 31, the push rod 32 moves up and down, making the transverse push operation of the anterior metatarsal very convenient.

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

[0139] Preferably, the rear metatarsal positioning mechanism 4 includes a U-shaped drive member 44, which includes a connecting panel 442 and drive arms 441 disposed on the left and right sides of the connecting panel 442 and extending in the front-back direction. The drive arms 441 are slidably installed in the elongated guide groove 1211 at the upper end of the rear upper support plate 121. A second positioning groove 4411 is formed at the end of the drive arm 441, and a drive inclined surface 44111 is formed at the end of the second positioning groove 4411. The left and right sides of the upper limit flange 422 extend outward to form an ear portion 4221. The ear portion 4221 is provided with a downwardly extending driven protrusion 42211, and the driven block 223 cooperates with the drive 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 drive member 44 and push the U-shaped drive member 44 inward. The drive arm 441 can then move past the ear 4221. The driven protrusion 42211 extends into the second positioning groove 4411 and cooperates with the drive inclined surface 44111 to drive the pressure sleeve 42 to rise upward, releasing the pressure plate 411. The fixing hook 41 can then be moved horizontally, so that the hook at the end of the fixing hook 41 can be inserted into or removed from the medullary cavity. During the process of moving the fixing hook 41, the pressure sleeve 42, under the action of the U-shaped drive member 44, overcomes the elasticity of the second spring 43 and remains in an elevated state. In other words, medical staff do not need to hold the pressure sleeve 42 by hand, making the horizontal movement of the fixing hook 41 very convenient.

[0140] In addition, the connecting panel 442 has a guide elongated hole 4421 parallel to the drive arm 441. The limiting bolt 45 passes through the guide elongated hole 4421 and is threadedly connected to the rear upper support plate 121. The guide elongated hole 4421 and the limiting bolt 45 can restrict the U-shaped drive member 44 on the rear upper support plate 121 and prevent the U-shaped drive member 44 from falling off during the pushing process, thereby improving the reliability of the device.

[0141] See attached document Figure 1 , 2 The rear metatarsal traction fixation mechanism 6 of the device includes a drill sleeve 63, a traction pin guide sleeve 62, and a second traction pin 61. The drill sleeve 63 is inserted into the stepped protrusion at the rear end of the guide bracket 1. The traction pin guide sleeve 62 and the second traction pin 61 are sequentially inserted into the drill sleeve 63 from the outside to the inside. In some embodiments, the stepped protrusion can also be configured as a sliding adjustable structure as in patent 202211080334.5, or it can be configured as a rotatable adjustable structure to adjust the insertion angle of the second traction pin 61.

[0142] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0143] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate 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: The device 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 mounted in the rotation mounting 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 located on the front and rear sides of the front metatarsal traction mechanism. The lower end of the push rod of the front metatarsal transverse pushing mechanism is provided with a push frame body. The first traction pin of the front metatarsal traction mechanism can pass through the middle hollow of the push frame body. The rotation angle indicating mechanism is used to display the angular position of the front metatarsal traction mechanism. The guide bracket has a pair of parallel and spaced-apart panels at its front end, namely 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 mounting cavity. The inner sides of the front panel and the rear panel are symmetrically provided with arc-shaped guide grooves. A locking component 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 on both the front and rear sides. 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. The anterior metatarsal traction mechanism includes a first traction pin, a cap, a main sleeve seat, and a limiting block. The first traction pin passes through the cap and the main sleeve seat in sequence along the axial direction. The cap is fitted onto the main sleeve seat. The top wall of the cap extends downward to form a pair of spaced-apart driving blocks. A pair of limiting blocks are slidably installed on the top of the main sleeve seat. The pair of limiting blocks are located on both sides of the first traction pin. The driving block and the limiting block are engaged by inclined surfaces. When the cap is pressed down, the driving block moves down and drives the limiting block to move laterally to clamp the first traction pin.

2. The hallux valgus correction guide device as described in claim 1, characterized in that: The rotation angle indicating mechanism includes a position pointing component, an angle scale panel, and a panel fixing base. The position pointing component 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.

3. The hallux valgus correction guide device as described in claim 1, characterized in that: At least one pair of buckles are provided on the side wall of the cap. Each buckle includes a connecting arm and a snap-fit ​​part. The upper end of the connecting arm is connected to the side wall of the cap through an elastic hinge part. The snap-fit ​​part is integrally formed on the lower end of the connecting arm and extends toward the inside of the cap. The bottom of the inner side of the snap-fit ​​part is provided with a snap-fit ​​part guide slope. The main sleeve seat has a set of slots on its side wall that correspond one-to-one with the buckle. Each slot set includes an upper slot and a lower slot arranged from top to bottom. The lower edge of the upper slot has an upper slot guide slope. The upper middle of the lower slot extends upward to form a first positioning groove. The lower slot has a sliding unlocking block that slides up and down. The sliding unlocking block includes a horizontal bar body and a positioning part located at the upper center of the horizontal bar body and extending upward. The positioning part has an upper unlocking block guide slope, and the horizontal bar body has a lower unlocking block guide slope. When the sliding unlocking block slides upward, its positioning part can be embedded in the first positioning groove of the upper protrusion of the lower slot, and the upper end face of the horizontal bar body can fit against the upper end face of the lower slot.

4. The hallux valgus correction guide device as described in claim 1, characterized in that: The front metatarsal transverse thrust mechanism includes a transverse thrust adjustment sleeve and a limiting sleeve. The front panel of the guide bracket has a pair of front upper support plates and front lower support plates that are spaced apart from top to bottom. The front upper support plate has an upwardly extending positioning sleeve. The lower part of the transverse thrust adjustment sleeve is inserted into the positioning sleeve. The limiting sleeve is sleeved between the transverse thrust adjustment sleeve and the positioning sleeve. The limiting sleeve is threaded with the positioning sleeve and limits the lower support flange at the lower end of the transverse thrust adjustment sleeve. The push rod has a threaded part and a spline part distributed from top to bottom. The threaded part passes through the front upper support plate and the positioning sleeve and is threaded with the transverse thrust adjustment sleeve. The spline part is engaged with the spline hole on the front lower support plate.

5. The hallux valgus correction guide device as described in claim 1, characterized in that: The device also includes a rear 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 main body of the fixing hook. A waist-shaped stepped hole is opened on the guide bracket. The pressure plate is slidably installed in the waist-shaped stepped hole. The pressure sleeve is sleeved on the rod-shaped main body of the fixing hook and passes downward 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.

6. The hallux valgus correction guide device as described in claim 5, characterized in that: The upper end of the waist-shaped sleeve body of the pressure sleeve is detachably equipped with an upper limit flange, the lower part of which is provided with a lower limit flange protruding outward, and the bottom of which is provided with a pressing flange protruding downward. The upper limit flange and the lower limit flange are respectively located on the upper and lower sides of the rear upper support plate. The two ends of the second spring abut against the lower limit flange and the rear upper support plate respectively. The pressing flange is annular and is used to press the pressure plate.

7. The hallux valgus correction guide device as described in claim 6, characterized in that: The rear metatarsal positioning mechanism includes a U-shaped drive component, which includes a connecting panel and drive arms located on the left and right sides of the connecting panel and extending in the front-back direction. The upper limit flange extends outward on the left and right sides to form an ear. The drive arms and the ear are engaged by a bevel to drive the pressure sleeve to lift upward.

8. The hallux valgus correction guide device as described in claim 7, characterized in that: The drive arm is slidably mounted in the long guide groove at the upper end of the rear upper support plate. The end of the drive arm is formed with a second positioning groove, and the end of the second positioning groove is formed with a drive slope. The ear is provided with a downwardly extending driven protrusion, which can extend into the second positioning groove and cooperate with the drive slope. The connecting panel has a guide strip hole parallel to the drive arm, and the limiting bolt passes through the guide strip hole and is threaded to the rear upper support plate.

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