CN114869666B

CN114869666B - Accurate fixing device of motion medical science joint operation

Info

Publication number: CN114869666B
Application number: CN202210482437.8A
Authority: CN
Inventors: 彭丽; 郭明晖; 刘滨生; 魏文举
Original assignee: Beijing Bohaikangyuan Medical Devices Co ltd
Current assignee: Beijing Bohaikangyuan Medical Devices Co ltd
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2022-11-08
Anticipated expiration: 2042-05-05
Also published as: CN114869666A

Abstract

The application relates to the field of special supports for joints, in particular to an accurate fixing device for joint surgery in sports medicine. A precise fixing device for a sport medical joint operation comprises a bottom plate, a track, a sliding adjusting assembly and a foot bracket, wherein the sliding adjusting assembly comprises a rack, a sliding block, a gear and an adjusting handle; the rack comprises tooth grooves arranged at intervals and fixed teeth between adjacent tooth grooves; the gear comprises movable teeth, one end of each movable tooth, which is far away from the center of the gear, is a tooth end surface, and the tooth end surface comprises a locking section; when the movable teeth abut against the fixed teeth on the same side with the movement trend direction of the sliding adjusting assembly to rotate, the tooth end surfaces of the adjacent movable teeth abut against the adjacent fixed teeth; when the locking section is abutted against the fixed teeth, the acting force applied by the fixed teeth to the movable teeth passes through the center of the gear or the side of the center of the gear, which is far away from the rack. The state gear can not rotate any more, the position of the sliding adjusting component is fixed, the process of adjusting by the unlocking pawl is saved, and the use is more convenient.

Description

Accurate fixing device of motion medical science joint operation

Technical Field

The application relates to the field of special supports for joints, in particular to an accurate fixing device for joint surgery in sports medicine.

Background

The horizontal position is a posture in joint and arthroscopic surgery, the patient lies on the operating bed, and the thigh of the patient needs to be bent by 90 degrees to 120 degrees. The patient can not control the knee bending posture of the thigh on the sick side through the autonomous consciousness because of anesthesia in the operation, and the limb positions are required to be changed frequently in the joint and arthroscopic operation. Therefore, at present, in joint and arthroscopic surgery, a fixing device is usually used as an auxiliary medical instrument, the leg of a patient is placed and fixed on the fixing device, and medical staff can conveniently adjust the limb position of the leg of the patient to perform surgery.

The existing fixing device comprises a base plate, a track arranged on the base plate, a sliding block capable of moving along the track, a ratchet wheel and a pawl arranged on the sliding block, and a rack arranged on the base plate and matched with a ratchet wheel. The foot bracket is arranged on the sliding block, when the bending angle of the thigh of the patient needs to be increased, only the ratchet wheel needs to be rotated, and the ratchet wheel matched with the rack drives the sliding block to move in the rotating process.

However, the above prior art has the following technical drawbacks: in order to prevent the sliding block from moving to reach the required thigh bending angle under the action of the natural straightening acting force of the thigh of the patient under the action of gravity, the sliding block is locked by the pawl in the moving direction. Therefore, when the thigh of the patient needs to be adjusted to reduce the bending angle, the pawl is only released first, so that the pawl can not limit the rotation of the ratchet wheel in the direction, and the slider can be adjusted to move in the direction of straightening the thigh, and the adjustment is inconvenient.

Disclosure of Invention

In order to more conveniently adjust the bending angle of patient's thigh, the application provides an accurate fixing device of motion medical joint operation.

The application provides a pair of accurate fixing device of motion medical joint operation adopts following technical scheme:

a precise fixing device for a sport medical joint operation comprises a bottom plate, a track arranged on the bottom plate, a sliding adjusting assembly moving along the track, and a foot bracket connected with the sliding adjusting assembly, wherein the sliding adjusting assembly comprises a rack arranged in parallel with the length direction of the track, a sliding block sliding along the track, a gear positioned on the sliding block and rotating relative to the sliding block, and an adjusting handle used for driving the gear to rotate, and the relative position of the rack and the track is fixed;

the rack comprises a row of tooth grooves arranged at intervals and fixed teeth between adjacent tooth grooves;

the gear comprises at least three movable teeth, one end of each movable tooth, which is far away from the center of the gear, is a tooth end surface, and the tooth end surface comprises a locking section;

when the movable teeth clamped in the tooth grooves abut against the fixed teeth on the opposite side of the movement trend direction of the sliding adjusting assembly to rotate, the adjacent movable teeth are clamped in the adjacent tooth grooves;

when the movable teeth clamped in the tooth grooves abut against the fixed teeth on the same side with the movement trend direction of the sliding adjusting assembly to rotate, the tooth end surfaces of the adjacent movable teeth abut against the adjacent fixed teeth; and when the locking section is abutted against the fixed teeth, the acting force applied by the fixed teeth to the movable teeth passes through the center of the gear or the side of the center of the gear, which is far away from the rack.

Through adopting above-mentioned technical scheme, when coming the bending angle of initiative regulation patient's thigh through rotation regulation handle, the movable tooth that blocks in the tooth's socket supports when rotating on the fixed tooth with the opposite side of slip adjustment subassembly motion trend direction, and adjacent movable tooth blocks in the adjacent tooth's socket for the motion of slip adjustment subassembly. When adjusting no longer when applying the effort to the adjustment handle after the position of sliding adjustment subassembly, because patient's shank can stretch the power of nature under the action of gravity, the side of the movable tooth that the card was gone into in the tooth's socket this moment and the fixed tooth butt of the same side of sliding adjustment subassembly movement trend direction for the gear takes place rotatoryly, when the gear is rotatory to next movable tooth and is about to go into the position in the tooth's socket, tooth terminal surface and fixed tooth butt, and when reaching the state of locking section and fixed tooth butt, the one side of rack is kept away from at the center or the gear center of acting force direction process gear that fixed tooth was applyed the movable tooth. At this time, the gear is fixed in position and cannot rotate any more, and the position of the sliding adjustment assembly is also fixed. The unlocking pawl is saved for adjustment, so that the use is more convenient.

Preferably, the tooth end surface is an arc surface with a circle center overlapped with the center of the gear.

Through adopting above-mentioned technical scheme, the extrusion force perpendicular to cambered surface that the cambered surface received is in the tangent plane direction of this stress point, consequently sets up the tooth terminal surface for the arc surface and the centre of a circle when overlapping with the gear center, during the optional position and the fixed tooth butt of tooth terminal surface, the extrusion force direction all passes through the center of gear, consequently the gear can not rotate under this state, and the slip adjustment subassembly can not slide. And when the adjusting handle is rotated again to drive the sliding adjusting assembly to move, interference fit between the movable teeth and the fixed teeth cannot occur in the rotating process, so that the operation is easier.

Preferably, a through groove penetrating through one side, close to the rack, of the sliding block is formed in the sliding block, the gear is located in the through groove, a spring located below the gear is arranged in the through groove, a through hole communicated with the through groove is formed in the sliding block, and a transmission shaft for connecting the gear and the adjusting handle penetrates through the through hole; when the spring is in a compressed state, the gear is disengaged from the rack; when the spring is in the extension state, the gear is blocked with the rack.

By adopting the technical scheme, when the bending angle of the thigh of the patient needs to be greatly adjusted, the adjusting handle can be pressed down, so that the spring is compressed, the gear is separated from the rack, and the sliding adjusting assembly can be pushed to slide along the track quickly. The bending angle who need accurate regulation patient thigh no longer pushes down the regulation handle, and gear and rack block this moment can adjust the position of sliding adjustment subassembly, the accurate bending angle who adjusts patient thigh through rotatory regulation handle.

Preferably, the rail comprises a lower plate for being attached to and connected with the bottom plate, side plates extending upwards from two sides of the lower plate, and upper plates extending towards opposite sides from the upper ends of the two side plates, wherein a row of tooth grooves arranged at equal intervals are formed in the side edge of one upper plate towards the other upper plate, fixed teeth are formed between the adjacent tooth grooves, and the upper plate is used as a rack; the sliding block comprises a limiting plate and a mounting block connected to the middle position above one end of the limiting plate, the width of the limiting plate is smaller than or equal to the distance between the two side plates, and the width of the limiting plate is larger than the distance between the two upper plates; the through groove is formed in the bottom face of the limiting plate and is deviated to one side of the rack, and the diameter of the through groove is larger than the width of the mounting block.

By adopting the technical scheme, the tooth grooves and the fixed teeth are formed on one upper plate and used as the racks, so that the racks additionally mounted are saved. Meanwhile, the diameter of the through groove is larger than the width of the mounting block, so that when the gear is sprung up under the action of the spring, one part of the gear can smoothly extend out of the through groove to be clamped with the rack.

Preferably, the middle part of the upper surface of the bottom plate is provided with a guide groove, the lower plate is embedded in the guide groove, a waist-shaped hole is formed in the lower plate, the length direction of the waist-shaped hole is along the length direction of the rail, and a fastener penetrates through the waist-shaped hole to fix the rail on the bottom plate.

Through adopting above-mentioned technical scheme, carry out the location of direction with the track through the guide way, and fashioned waist type hole then makes the track can carry out the small-amplitude adjustment of position along the direction of guide way and adapt to not need on the hypoplastron.

Preferably, the sliding block comprises a mounting column, a rotating frame is arranged on the mounting column, and the rotating frame comprises a rotating column sleeved on the outer side of the mounting column and a frame body of the mounting foot bracket; the side shaping of column spinner has the regulation hole, and the regulation hole is waist type and extends around the column spinner surface along the horizontal direction, is equipped with the fixed subassembly that passes regulation hole and erection column on the column spinner, and fixed subassembly includes the screw rod and connects the portion that compresses tightly that is greater than the regulation hole width in screw rod one end and diameter, the screw rod is kept away from the one end and the erection column of portion that compress tightly or nut threaded connection.

Through adopting above-mentioned technical scheme, during the fixed subassembly of unblock, the change of rotation angle can be carried out at the within range of regulation hole to column spinner and erection column, satisfies the regulation demand of thigh internal rotation, external rotation. After the adjustment is completed, the position of the rotating frame can be fixed by screwing the fixing component again.

Preferably, the side of the mounting column is formed with an internal thread hole along the horizontal direction, the screw rod is in threaded connection and matching with the internal thread hole, and the side of the pressing part is connected with a holding part.

By adopting the technical scheme, the pressing part and the screw rod can be conveniently operated to rotate through the holding part, and the pressing part can be close to or far away from the rotary column to lock or unlock the rotary column due to the threaded connection and matching of the screw rod and the internal threaded hole.

Preferably, the frame body comprises a transverse support member with a lower end face connected with the rotary column and longitudinal support members vertically and upwardly extending from two ends of the transverse support member, a swing groove is formed in the upper end of each longitudinal support member, the swing groove penetrates through the longitudinal support member along a direction parallel to the length direction of the transverse support member, the bottom surfaces of the two swing grooves are coaxial and isodiametric semi-arc surfaces, screw holes penetrating through the longitudinal support member are formed in the inner walls of two sides of each swing groove, the distance between each screw hole and the bottom surface of the swing groove is equal and larger than the diameter of the semi-arc surface, ball screws penetrate through the screw holes, and balls of the ball screws extend into the swing grooves; the equal shaping in both sides of foot bracket has the extension post, and the one side shaping that extends the post back to the foot bracket has the diameter to be less than the joint post that extends the post, and the diameter of joint post equals with the diameter of semi-circular arc face, and the distance between two joint posts the farthest end equals or is close two and indulges support piece and deviates from the distance between the side mutually, and the distance between two joint posts the most proximal end is less than two and indulges the distance between the support piece side in opposite directions.

Through adopting above-mentioned technical scheme, the diameter of joint post equals with the diameter of semicircle face, supports behind the ball of ball screw the joint post crowded ball of foot bracket and accomplishes the installation at the bottom surface of swing groove. The installation is accomplished the back foot bracket and can be rotated around the axis of semicircle face, and when not receiving ascending external force, the joint post can not deviate from the swing inslot.

Preferably, the support plate is detachably connected with the bottom plate, a plurality of baffle plates are connected to one circle around the support plate, the side, facing the center of the support plate, of each baffle plate comprises a vertical section and an inclined section, and the inclined section inclines from bottom to top in the direction far away from the center of the support plate; when the bottom plate was arranged in the mounting panel top, the border of bottom plate and the vertical section butt of baffle.

Through adopting above-mentioned technical scheme, the mounting panel is used for installing on sick bed or operating table, fixes a position the position of bottom plate through the baffle of round around. The inclined section of the baffle can be matched with the guide bottom plate, so that the bottom plate can be more easily positioned and attached to the support plate.

Preferably, the lower terminal surface of baffle has the constant head tank towards mounting panel one side shaping, the bottom surface of constant head tank and the lateral wall butt of mounting panel, the last lateral wall of constant head tank and the up end butt of mounting panel, and equal shaping has the connecting hole on every baffle, wears to be equipped with the fastener in the connecting hole and fixes the baffle on the mounting panel.

Through adopting above-mentioned technical scheme, make the position of baffle and mounting panel preliminarily fixed through the fixed 0 position groove on the baffle, then can fix the baffle on the mounting panel through the fastener more conveniently.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when having adjusted the position of sliding adjustment subassembly after no longer to the adjustment handle application effort, because patient's shank has the power of straightening naturally under the action of gravity, the side of the movable tooth in the card income tooth's socket and the fixed tooth butt of the same side of sliding adjustment subassembly motion trend direction this moment for the gear takes place rotatoryly, when the gear is rotatory to next movable tooth and be about to the position of card income tooth's socket, tooth terminal surface and fixed tooth butt, and when reaching the state of locking segment and fixed tooth butt, the one side of rack is kept away from at the center of the effort direction process gear or gear center that fixed tooth applyed the movable tooth. The fixed position of gear can't rotate this moment again, and the position of slip adjustment subassembly is also fixed, saves the process that the unblock pawl adjusted, and it is more convenient to use.

2. When the bending angle of the thigh of the patient needs to be adjusted greatly, the adjusting handle can be pressed down to compress the spring, the gear is separated from the rack, and the sliding adjusting assembly can be pushed to slide along the track quickly; the bending angle who need accurate regulation patient thigh no longer pushes down the regulation handle, and gear and rack block this moment can adjust the position of sliding adjustment subassembly, the accurate bending angle who adjusts patient thigh through rotatory regulation handle.

Drawings

FIG. 1 is a schematic structural view of an embodiment;

FIG. 2 is a schematic diagram of the embodiment after hiding a portion of the fastener and separating the base plate and the bracket plate;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

FIG. 5 is an exploded schematic view of the sliding adjustment assembly and foot bracket portion of the embodiment;

FIG. 6 is a schematic cross-sectional view of the mating portions of the slider and gear, adjustment knob in an embodiment;

FIG. 7 is a schematic structural view of the rotary frame, the fixing member and the foot rest in the embodiment in a separated state;

FIG. 8 is a process of changing the engagement state of the rack and pinion when the adjustment knob is rotated to drive the sliding adjustment assembly;

fig. 9 shows the change of the engagement state of the gear and the rack when the force for straightening the thigh drives the sliding adjustment assembly.

Description of reference numerals: 1. a substrate; 2. a track; 3. a slide adjustment assembly; 4. a foot rest; 5. a mounting plate; 6. a base plate; 7. a support block; 8. a bracket hole; 9. a baffle plate; 10. connecting holes; 11. positioning a groove; 12. a vertical section; 13. an inclined section; 14. mounting holes; 15. a guide groove; 16. a lower plate; 17. a side plate; 18. an upper plate; 19. a kidney-shaped hole; 20. a tooth socket; 21. fixing teeth; 22. a rack; 23. a slider; 24. a gear; 25. adjusting the handle; 26. a limiting plate; 27. mounting a block; 28. a transition plate; 29. mounting a column; 30. a through groove; 31. a movable tooth; 32. a drive shaft; 33. a spring; 34. a rotating frame; 35. rotating the column; 36. a frame body; 37. mounting grooves; 38. an adjustment hole; 39. an internally threaded hole; 40. a fixing component; 41. a screw; 42. a pressing part; 43. a grip portion; 44. a cross support; 45. a longitudinal support; 46. a swing groove; 47. a semi-circular arc surface; 48. a screw hole; 49. a ball screw; 50. a clamping column; 51. a through hole; 52. a tooth end face; 53. and (6) extending the column.

Detailed Description

The present application is described in further detail below with reference to the attached figures X-X.

The first embodiment is as follows:

as shown in fig. 1, a precision fixing device for a sport medical joint operation comprises a base plate 1, a rail 2 arranged on the base plate 1, a sliding adjusting assembly 3 moving along the rail 2, and a foot bracket 4 connected with the sliding adjusting assembly 3.

As shown in fig. 2 and 3, the base plate 1 includes a support plate 5 and a bottom plate 6, the support plate 5 is rectangular, a support block 7 is formed on one side of the support plate 5, two support holes 8 are formed on the support block 7, and the support plate 5 can be fixed on the bed frame by fasteners passing through the support holes 8. The position that is close to both ends on every limit of mounting panel 5 respectively is provided with a baffle 9, all the shaping has two connecting holes 10 on every baffle 9, can pass connecting hole 10 through the fastener and be connected with mounting panel 5 and fix baffle 9 on mounting panel 5. Baffle 9 perpendicular to mounting panel 5 upwards extends, and baffle 9's lower extreme has constant head tank 11 towards the shaping of 5 one sides of mounting panel, and constant head tank 11's bottom surface and mounting panel 5's lateral wall butt, and constant head tank 11's last lateral wall and mounting panel 5's up end butt are fixed with mounting panel 5. The baffle 9 includes vertical section 12 and slope section 13 towards the side at mounting panel 5 center, and wherein vertical section 12 perpendicular to mounting panel 5's upper surface, slope section 13 from up the direction slope of keeping away from mounting panel 5 center down. Bottom plate 6 is the rectangle, and when bottom plate 6 was arranged in the top of mounting panel 5, the border of bottom plate 6 and the vertical section 12 butt of baffle 9. The mounting holes 14 which are arranged in six arrays and correspond to one another are formed in the bottom plate 6 and the support plate 5, and the bottom plate 6 and the support plate 5 can be detachably connected together through penetrating fasteners.

As shown in fig. 2 and 4, a guide groove 15 is formed in the middle of the upper surface of the bottom plate 6 along the length direction of the bottom plate 6, and the rail 2 includes a lower plate 16 embedded in the guide groove 15, side plates 17 formed by extending upward from both sides of the lower plate 16, and an upper plate 18 formed by extending upward from the upper ends of the two side plates 17 to the opposite side. A waist-shaped hole 19 is formed in the lower plate 16 near each of the two ends, the length direction of the waist-shaped hole 19 is along the length direction of the rail 2, and the rail 2 is fixed in the guide groove 15 by a fastener penetrating through the waist-shaped hole 19 and connecting with the bottom plate 6. The side of one upper plate 18 facing the other upper plate 18 is formed with a row of equally spaced apart splines 20, and a stationary tooth 21 is formed between adjacent splines 20, such that the upper plate 18 functions as a rack 22. The upper plate 18 forming the structure of the tooth grooves 20 and the fixed teeth 21 is named as a rack 22, and the rack 22 is used as a part of the sliding adjusting assembly 3 to realize the position adjusting function.

As shown in fig. 5, the sliding adjustment assembly 3 further includes a slider 23, a gear 24 which rotates relative to the slider 23 and can be engaged with the rack 22, and an adjustment handle 25 for driving the gear 24 to rotate. The slider 23 includes a limiting plate 26, a mounting block 27 formed at a position above and in the middle of one end of the limiting plate 26, a transition plate 28 formed above and in the middle of the limiting plate 26, and a mounting post 29 connected above one end of the transition plate 28 remote from the mounting block 27, wherein a side surface of the transition plate 28 is connected to the mounting block 27. The width of the limit plate 26 is equal to or slightly smaller than the distance between the two side plates 17, and the height of the limit plate 26 is smaller than the distance between the rack 22 and the lower plate 16.

As shown in fig. 5 and 6, a circular through groove 30 is formed on the lower surface of the limit plate 26 below the mounting block 27 and biased to one side of the rack 22, the diameter of the through groove 30 is larger than the width of the mounting block 27, and the through groove 30 penetrates through the limit plate 26 and extends to the height inside the mounting block 27 close to the upper surface of the transition plate 28. The gear 24 is in logical groove 30, and the gear 24 includes along the fashioned four movable tooth 31 of circumference equipartition, and the edge of movable tooth 31 upper and lower surface all is equipped with the chamfer. The axis of the gear 24 is along the vertical direction, the center of the upper surface of the gear 24 is connected with a transmission shaft 32, and the transmission shaft 32 vertically penetrates through a through hole 51 which is arranged on the mounting block 27 and has the same diameter as the transmission shaft 32. The adjusting handle 25 is sleeved on the upper end of the transmission shaft 32, which penetrates through the mounting block 27, and the adjusting handle 25 and the transmission shaft 32 are simultaneously penetrated through by a fastener along the horizontal direction, so that the transmission shaft 32 can be simultaneously driven to rotate to drive the gear 24 to rotate when the adjusting handle 25 is operated to rotate. A spring 33 is arranged below the gear 24, the lower end of the spring 33 is abutted with the lower plate 16, and the upper end of the spring 33 is abutted with the gear 24 to drive the gear 24 to move upwards until the upper surface of the gear 24 is abutted with the bottom surface of the through groove 30. When the adjustment handle 25 is forced downward, the spring 33 is compressed and the height of the gear 24 is lower than the height of the rack 22, so that the sliding adjustment assembly 3 can slide rapidly in the track 2. When adjusting handle 25 not receive decurrent effort, spring 33 drives gear 24 and goes up the bullet for gear 24 reaches and rack 22 complex position, and movable tooth 31 card is gone into in the tooth's socket 20, can drive gear 24 through adjusting handle 25 this moment and rotate the realization and to the accurate regulation and control of slide adjusting assembly 3 position.

As shown in fig. 5 and 7, the mounting post 29 is provided with a rotating frame 34, the rotating frame 34 includes a rotating post 35 and a frame body 36, a mounting groove 37 having a diameter equal to that of the mounting post 29 is formed on a lower end surface of the rotating post 35, an adjusting hole 38 communicated with the mounting groove 37 is formed on a side surface of the rotating post 35, and the adjusting hole 38 is waist-shaped and extends around the surface of the rotating post 35 along a horizontal direction. The side surface of the upper end of the mounting column 29 is formed with a horizontally-oriented female screw hole 39, and a fixing member 40 is provided to pass through the rotating column 35 and the mounting column 29 to fix the rotation angle of the rotating frame 34. The fixing assembly 40 includes a screw 41 threadedly engaged with the internally threaded hole 39, a pressing portion 42 fixedly connected to one end of the screw 41 and having a diameter larger than the width of the adjusting hole 38, and a grip portion 43 formed at a side surface of the pressing portion 42. After the fixing assembly 40 is unscrewed, the rotating frame 34 can be rotated and adjusted in the horizontal direction, and after the adjustment is finished, the angle of the rotating frame 34 can be fixed again by screwing the fixing assembly 40.

As shown in fig. 7, the frame body 36 includes a horizontal support member 44 connected to the rotary column 35 at a middle portion of a lower end surface thereof, and a vertical support member 45 vertically extending upward at both ends of the horizontal support member 44. The upper end of each longitudinal support member 45 is formed with a swinging groove 46, the swinging grooves 46 penetrate through the longitudinal support members 45 along the direction parallel to the length direction of the transverse support member 44, and the bottom surfaces of the two swinging grooves 46 are semi-circular arc surfaces 47 with the same axis and the same diameter. Screw holes 48 penetrating through the longitudinal support member 45 are formed in the inner walls of the two sides of each swing groove 46, and the distance between each screw hole 48 and the bottom surface of each swing groove 46 is equal and larger than the diameter of the semicircular arc surface 47. A ball screw 49 is inserted into the screw hole 48, the ball of the ball screw 49 is aligned with the direction in the swing groove 46, and only part of the ball extends into the swing groove 46.

As shown in fig. 7, the two sides of the foot bracket 4 are both formed with extension columns 53, the end of the extension column 53 opposite to the foot bracket 4 is formed with a clamping column 50 with a diameter smaller than the extension column 53, the distance between the farthest ends of the two clamping columns 50 is equal to or close to the distance between the opposite sides of the two longitudinal supporting members 45, and the distance between the nearest ends of the two clamping columns 50 is smaller than the distance between the opposite sides of the two longitudinal supporting members 45. The diameter of the snap-in post 50 is equal to the diameter of the semi-arc surface 47, and when the snap-in post 50 of the foot bracket 4 pushes the ball of the ball screw 49, the snap-in post abuts against the bottom surface of the swing groove 46 and can rotate around the axis of the semi-arc surface 47.

When in use, the feet of a patient extend into the foot bracket 4, and the position of the foot bracket 4 can be adjusted along the track 2 to change the bending angle of the legs of the patient.

When the bending angle of the leg of the patient needs to be adjusted greatly, the spring 33 is compressed by pressing the adjusting handle 25, the gear 24 is separated from the rack 22, and the sliding adjusting assembly 3 can be pushed to slide rapidly along the track 2.

As shown in fig. 8, the hollow arrow in fig. 8 indicates the direction of the movement trend of the sliding adjustment assembly 3, and the implementation arrow indicates the process of changing the matching state of the gear 24 and the rack 22. When the bending angle of the leg of the patient needs to be accurately adjusted in a small range, the gear 24 clamped with the rack 22 drives the sliding adjusting component 3 to move in a small range and high accuracy in the rotating process by rotating the adjusting handle 25. When the gear 24 rotates, the side surface of the movable tooth 31 inserted into the tooth groove 20 abuts against the fixed tooth 21 on the opposite side of the movement trend direction of the sliding adjustment assembly 3, and the sliding adjustment assembly 3 is driven to move in the process of rotating the gear 24. Before the movable teeth 31 are disengaged from the tooth grooves 20, the adjacent movable teeth 31 are caught in the adjacent tooth grooves 20, so that the sliding adjusting assembly 3 continues to move forward.

As shown in fig. 9, the hollow arrow in fig. 9 indicates the direction of the movement trend of the sliding adjustment assembly 3, and the implementation arrow indicates the process of changing the matching state of the gear 24 and the rack 22. The end of the movable tooth 31 away from the center of the gear 24 is a tooth end face 52, and the tooth end face 52 comprises a locking section. After the position of the sliding adjustment assembly 3 is adjusted, because the leg of the patient has a natural straightening force under the action of gravity, the side surface of the movable tooth 31 clamped in the tooth socket 20 abuts against the fixed tooth 21 on the same side in the movement trend direction of the sliding adjustment assembly 3, so that the gear 24 rotates, when the gear 24 rotates to the position where the next movable tooth 31 is about to be clamped in the tooth socket 20, the tooth end surface 52 abuts against the fixed tooth 21, and when the locking section abuts against the fixed tooth 21, the direction of the acting force applied by the fixed tooth 21 to the movable tooth 31 passes through the center of the gear 24 or the center of the gear 24 and is far away from one side of the rack 22. At this time, the gear 24 is fixed in position and cannot rotate any more, and the position of the slide adjusting assembly 3 is also fixed.

The tooth end face 52 includes, but is not limited to, the following:

when the tooth end surface 52 is an arc surface whose center is overlapped with the center of the gear 24, the entire tooth end surface 52 is a locking segment, and at this time, the direction of the acting force applied by the fixed teeth 21 to the movable teeth 31 passes through the center of the gear 24, so that the gear 24 is not driven to rotate.

When the tooth end face 52 is an arc surface having a center on a line segment between the center of the gear 24 and the middle of the tooth end face 52, the locking segment is formed from the middle of the tooth end face 52 to the side of the tooth end face 52 facing into the tooth space 20.

When the tooth end face 52 is a circular arc face with the center as the center located on the extension line of the middle of the tooth end face 52 pointing to the center direction of the gear 24 or the tooth end face 52 is a plane with the center perpendicular line passing through the center of the gear 24, the locking section is formed from the middle of the tooth end face 52 to the side of the tooth end face 52 back to the tooth space 20.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A precise fixing device for a sport medical joint operation comprises a bottom plate (6), a track (2) arranged on the bottom plate (6), a sliding adjusting component (3) moving along the track (2), and a foot bracket (4) connected with the sliding adjusting component (3),

the sliding adjusting assembly (3) comprises a rack (22) arranged in parallel to the length direction of the track (2), a sliding block (23) sliding along the track (2), a gear (24) positioned on the sliding block (23) and rotating relative to the sliding block (23), and an adjusting handle (25) for driving the gear (24) to rotate, wherein the relative position of the rack (22) and the track (2) is fixed;

the rack (22) comprises a row of tooth grooves (20) arranged at intervals and fixed teeth (21) between the adjacent tooth grooves (20);

the gear (24) comprises at least three movable teeth (31), one end of each movable tooth (31) far away from the center of the gear (24) is a tooth end face (52), and each tooth end face (52) comprises a locking section;

when the movable teeth (31) clamped in the tooth grooves (20) abut against the fixed teeth (21) on the opposite side of the movement trend direction of the sliding adjusting assembly (3) to rotate, the adjacent movable teeth (31) are clamped in the adjacent tooth grooves (20);

when the movable teeth (31) clamped in the tooth grooves (20) rotate against the fixed teeth (21) on the same side with the movement trend direction of the sliding adjusting assembly (3), the tooth end surfaces (52) of the adjacent movable teeth (31) abut against the adjacent fixed teeth (21); when the locking section is abutted against the fixed teeth (21), the direction of the acting force applied by the fixed teeth (21) to the movable teeth (31) passes through the center of the gear (24) or the side of the center of the gear (24) far away from the rack (22).

2. The kinematic medical joint surgery precision fixation device of claim 1, wherein the tooth end surfaces (52) are circular arc surfaces with a center overlapping a center of the gear (24).

3. The precision fixing device for the joint surgery of the sports medicine according to claim 1, wherein a through groove (30) penetrating through one side, close to the rack (22), of the slider (23) is formed in the slider (23), the gear (24) is located in the through groove (30), a spring (33) located below the gear (24) is arranged in the through groove (30), a through hole (51) communicated with the through groove (30) is formed in the slider (23), and a transmission shaft (32) connecting the gear (24) and the adjusting handle (25) is arranged in the through hole (51) in a penetrating manner; when the spring (33) is in a compressed state, the gear (24) is disengaged from the rack (22); when the spring (33) is in an extended state, the gear (24) is engaged with the rack (22).

4. The kinematic medical joint surgery precision fixing device according to claim 3, wherein the rail (2) comprises a lower plate (16) for being attached to the bottom plate (6), side plates (17) extending upwards from two sides of the lower plate (16), and upper plates (18) extending towards opposite sides from the upper ends of the two side plates (17), wherein a row of equally spaced tooth grooves (20) are formed on the side edge of one upper plate (18) facing the other upper plate (18), a fixing tooth (21) is formed between the adjacent tooth grooves (20), and the upper plate (18) is used as a rack (22); the sliding block (23) comprises a limiting plate (26) and a mounting block (27) connected to the middle position above one end of the limiting plate (26), the width of the limiting plate (26) is smaller than or equal to the distance between the two side plates (17), and the width of the limiting plate (26) is larger than the distance between the two upper plates (18); the through groove (30) is formed in the bottom face of the limiting plate (26) and is deviated to one side of the rack (22), and the diameter of the through groove (30) is larger than the width of the mounting block (27).

5. The precision fixing device for the joint surgery of the sports medicine according to claim 4, characterized in that a guide groove (15) is formed in the middle of the upper surface of the bottom plate (6), the lower plate (16) is embedded in the guide groove (15), a waist-shaped hole (19) is formed in the lower plate (16), the length direction of the waist-shaped hole (19) is along the length direction of the rail (2), and a fastener penetrates through the waist-shaped hole (19) to fix the rail (2) on the bottom plate (6).

6. The kinematic medical joint surgery precision fixing device according to any one of claims 1 to 5, characterized in that the sliding block (23) comprises a mounting column (29), a rotating frame (34) is arranged on the mounting column (29), and the rotating frame (34) comprises a rotating column (35) sleeved outside the mounting column (29) and a frame body (36) of the mounting foot bracket (4); the side shaping of column spinner (35) has regulation hole (38), and regulation hole (38) are waist type and extend around column spinner (35) surface along the horizontal direction, are equipped with fixed subassembly (40) that pass regulation hole (38) and erection column (29) on column spinner (35), and fixed subassembly (40) include screw rod (41) and connect in screw rod (41) one end and diameter be greater than the portion (42) that compresses tightly of regulation hole (38) width, the one end and erection column (29) or nut threaded connection of portion (42) are kept away from in screw rod (41).

7. The precision motion medical joint surgery fixing device as recited in claim 6, characterized in that the side surface of the mounting column (29) is formed with a horizontal internal threaded hole (39), the screw rod (41) is in threaded connection with the internal threaded hole (39), and the side surface of the pressing part (42) is connected with a holding part (43).

8. The kinematic medical joint surgery precision fixing device according to claim 6, wherein the frame body (36) comprises a horizontal support member (44) having a lower end surface connected to the rotation column (35), and longitudinal support members (45) vertically and upwardly extending from both ends of the horizontal support member (44), wherein a swing groove (46) is formed at an upper end of each longitudinal support member (45), the swing groove (46) penetrates through the longitudinal support members (45) along a direction parallel to a length direction of the horizontal support member (44), bottom surfaces of the two swing grooves (46) are coaxial and isodiametric semi-arc surfaces (47), screw holes (48) penetrating through the longitudinal support members (45) are formed on inner walls of both sides of each swing groove (46), a distance between each screw hole (48) and the bottom surface of the swing groove (46) is equal to and larger than a diameter of the semi-arc surface (47), a ball screw (49) penetrates through the screw holes (48), and a ball of the ball screw (49) extends into the swing groove (46); the equal shaping in both sides of foot bracket (4) has extension post (53), one side shaping that extension post (53) foot bracket (4) dorsad has diameter to be less than joint post (50) that extend post (53), the diameter of joint post (50) equals with the diameter of semicircle face (47), distance between two joint posts (50) the farthest ends equals or is close two and indulges support piece (45) and indulge the distance between the side mutually, distance between two joint posts (50) the nearest is less than two and indulges support piece (45) distance between the side mutually.

9. The kinematic medical joint surgery precision fixing device according to any one of claims 1 to 5, further comprising a support plate (5) detachably connected with the bottom plate (6), wherein a plurality of baffle plates (9) are connected around the support plate (5), the side of the baffle plate (9) facing the center of the support plate (5) comprises a vertical section (12) and an inclined section (13), and the inclined section (13) is inclined from bottom to top in a direction away from the center of the support plate (5); when the bottom plate (6) is arranged above the support plate (5), the edge of the bottom plate (6) is abutted against the vertical section (12) of the baffle (9).

10. The motion medical accurate fixing device for joint surgery according to claim 9, wherein a positioning groove (11) is formed in one side, facing the support plate (5), of the lower end face of the baffle plate (9), the bottom face of the positioning groove (11) abuts against the side wall of the support plate (5), the upper side wall of the positioning groove (11) abuts against the upper end face of the support plate (5), a connecting hole (10) is formed in each baffle plate (9), and a fastener penetrates through the connecting hole (10) to fix the baffle plate (9) on the support plate (5).