Automatic pin extractor for bone surgery

Abstract

The application relates to the technical field of medical devices, in particular to an automatic nail taking device for bone treatment, which comprises a nail taking device and a workbench, an orthopedic support and a linear slide rail which are respectively installed on the workbench, a moving slide block capable of moving along the linear slide rail is arranged on the linear slide rail, a hinged seat is arranged on the moving slide block, an arc-shaped slide rail capable of overturning is hinged on the hinged seat, a clamping part is arranged at the tail end of the arc-shaped slide rail, a plug-in part is arranged on the workbench, a moving jig is arranged on the arc-shaped slide rail, a bearing plate for vertically placing the nail taking device is arranged between the two moving jigs, a sleeve matched with the bearing plate is arranged on the outside of the nail taking device, a clamping plate capable of clamping the outside of the sleeve is arranged above the bearing plate, a transmission mechanism is arranged on the moving jig, the bearing plate and the two clamping plates are respectively in transmission connection with the inside of the transmission mechanism, and a locking mechanism is further arranged in the inside of the transmission mechanism. The application can further fasten the nail taking device and increase the adjustment range of the nail taking device.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an automatic nail removal device for bone treatment. Background Technology

[0002] Orthopedics is one of the most common departments in major hospitals. It mainly studies the anatomy, physiology and pathology of the musculoskeletal system and uses drugs, surgery and physical methods to maintain and develop the normal shape and function of this system. When performing bone connection, steel plates need to be installed on the bones to help people recover. After the bones have recovered, the steel plates need to be removed.

[0003] The currently published Chinese patent CN213190029U discloses a novel screw remover for clinical orthopedic use, comprising an L-shaped plate and an orthopedic support. The upper surface of the L-shaped plate is provided with the orthopedic support, and a tray is movably connected to the outer surface of the L-shaped plate via a fixing plate. A sliding groove is formed on the upper surface of the L-shaped plate, and a slider is movably connected inside the groove. A support rod is movably connected to the upper surface of the slider. This novel screw remover for clinical orthopedic use incorporates a clamping plate and an expansion plate. The expansion plate supports the surrounding muscle tissue, facilitating the clamping plate's entry into the body. The clamping plate clamps the bone screw, and a reinforcing spring in the middle of the clamping plate maintains this clamping state, preventing the clamping tool from slipping out during clamping. By using locking plates A and B, and first locking slots, locking plates A and B can be separated, and the screw remover can be placed into different first locking slots to remove bone screws at different distances on the left and right sides.

[0004] According to the aforementioned patent, bone screws at different distances on the left and right sides can be removed. However, the angle of the screw remover cannot be adjusted, which greatly limits the adjustment of the screw remover. Furthermore, the screw remover is difficult to disassemble and assemble when replacing, removing, or repairing. Therefore, there is a need for a screw removal device that can achieve multi-angle adjustment and has quick disassembly and assembly. Summary of the Invention

[0005] To address the problems existing in the current technology, this application provides an automatic nail retrieval device for bone treatment. Through the cooperation of the transmission mechanism, clamping plate and bearing plate, the nail retrieval device can be quickly assembled and disassembled. The locking mechanism can further secure the nail retrieval device. Furthermore, through the cooperation of the annular slide rail, annular sliding fixture and linear slide rail, the nail retrieval device can be adjusted to any angle, increasing the adjustment range of the nail retrieval device.

[0006] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0007] An automatic nail removal device for bone treatment includes a nail remover and a worktable, as well as an orthopedic support and a linear slide rail respectively mounted on the worktable. The linear slide rail is located on one side of the orthopedic support. A movable slider that can move along the linear slide rail is provided on the linear slide rail. A hinge seat is provided on the movable slider. An arc-shaped slide rail that can be rotated is hinged on the hinge seat. A locking part is provided at the end of the arc-shaped slide rail. An insertion part for the locking part to be inserted and engaged is provided on the worktable. At least one pair of arc-shaped slide rails are provided and symmetrically arranged on both sides of the hinge seat. A movable fixture is provided on the arc-shaped slide rail. Two movable fixtures are symmetrically arranged. A support plate for vertically placing the nail remover is provided between the two movable fixtures. A sleeve that is inserted and engaged with the support plate is provided on the outside of the nail remover. A clamping plate that can clamp the outside of the sleeve is provided above the support plate. A transmission mechanism is provided on the movable fixture. The support plate and the two clamping plates are respectively connected to the internal transmission mechanism. A locking mechanism is also provided inside the transmission mechanism.

[0008] Preferably, the moving fixture includes a drive housing, a rotary motor, rollers, and an arc-shaped slider;

[0009] The drive housing is fitted onto the arc-shaped slide rail, and openings are provided on both sides of the drive housing to avoid the arc-shaped slide rail;

[0010] The roller is vertically positioned inside the drive housing. The arc-shaped slide rail has an arc-shaped track for the roller to move. The two sides of the arc-shaped track are open. A rotating shaft is located at the center of the roller. The rotating shaft is horizontally positioned, and the two ends of the rotating shaft pass through the two sides of the arc-shaped track and are axially connected to the two sides of the inside of the drive housing.

[0011] The rotary motor is located outside the drive housing, and the output shaft of the rotary motor is connected to one end of the rotating shaft for transmission.

[0012] The arc-shaped slider is located at the bottom of the drive housing, and the lower end of the arc-shaped slide rail is provided with an arc-shaped groove for the arc-shaped slider to slide.

[0013] Preferably, the movable fixture further includes a positioning mechanism, which includes a sleeve, a ball, a first spring, a contact plate, and a locking bolt;

[0014] The sleeve is vertically installed at the top center of the drive housing;

[0015] The ball is rolled in the inner ring of the sleeve. The bottom of the sleeve is provided with a limiting part that can restrict half of the ball inside the sleeve. The other half of the ball extends outward through the limiting part. An arc-shaped block is provided on the arc-shaped slide rail. The bottom end of the sleeve faces the upper surface of the arc-shaped block. The upper surface of the arc-shaped block is provided with several grooves that are equidistantly distributed along the length direction of the arc-shaped block. The part of the ball that extends out matches the shape of the groove.

[0016] The first spring is located inside the sleeve, and the bottom end of the first spring contacts the outside of the ball.

[0017] The abutment plate is horizontally positioned inside the sleeve and located at the top of the first spring;

[0018] The locking bolt is located at the upper end of the sleeve via a threaded connection, and the working end of the locking bolt is rotatably connected to the center of the abutment plate.

[0019] Preferably, the support plate is provided with a through hole for the working end of the nail remover to pass through, the lower end of the sleeve is provided with a collar, the diameter of the through hole is smaller than the diameter of the collar, and the support plate is provided with an annular placement groove that matches the collar.

[0020] Preferably, the transmission mechanism includes a clamping housing, a vertical plate, a horizontal plate, a gear, and a return spring;

[0021] The clamping housing is vertical and detachable, located on the side of the drive housing away from the rotary motor;

[0022] The vertical plate is vertically installed inside the clamping housing. The length of the vertical plate is greater than the height of the clamping housing. The upper and lower ends of the vertical plate extend outward through the upper and lower ends of the clamping housing, respectively. The upper and lower ends of the clamping housing are respectively provided with a first moving clearance opening for the vertical plate to slide. The lower end of the vertical plate is fixedly connected to one side of the bearing plate.

[0023] The horizontal plates are a pair and are respectively provided on both sides of the clamping housing. The two sides of the clamping housing are respectively provided with second moving clearance openings for the corresponding horizontal plates to slide. The two horizontal plates are located behind the vertical plate. The ends of the two horizontal plates away from the clamping housing are respectively connected to the two clamping plates through connecting plates.

[0024] The gear is horizontally positioned at the center of the clamping housing. The center of the gear is rotatably connected to the inner wall of the clamping housing via a rotating rod. The gear passes through a vertical plate and two horizontal plates. The gear is divided into a front end body and a rear end body. The vertical plate has a vertical through-hole to avoid the gear. The vertical opening of the vertical plate has a first rack that is vertically positioned and can mesh with the gear. The horizontal plate has a second rack that extends horizontally and can mesh with the gear on the side facing the gear. The second racks on the two horizontal plates are arranged crosswise above and below the gear.

[0025] The return spring is vertically positioned inside the clamping housing. The top end of the return spring is fixedly connected to the upper end of the clamping housing, and the bottom end of the return spring is fixedly connected to the lower outer wall of the vertical plate inside the clamping housing.

[0026] Preferably, the vertical plate has symmetrically arranged strip-shaped limiting grooves distributed along the vertical direction on both sides, and the clamping housing has guide posts inside that can be limited to move within each strip-shaped limiting groove. Each of the two second racks has a limiting strip on the side away from the gear, and the clamping housing has a limiting slide for each limiting strip to move horizontally.

[0027] Preferably, the clamping plate is semi-arc in shape, and the two clamping plates can wrap around the outside of the sleeve. A rubber pad is attached to the inner wall of the clamping fixture.

[0028] Preferably, the locking mechanism includes a movable plate and a fixed plate;

[0029] The fixing plate is vertically positioned on one side of the top of the clamping housing;

[0030] The movable plates are arranged in pairs and mirror images on both sides of the vertical plate. The vertical plate has inverted L-shaped moving grooves distributed along the vertical direction of the vertical plate. Between the two movable plates is a smooth rod that can move within the inverted L-shaped moving grooves. The two ends of the smooth rod are respectively axially connected to the side walls of the two movable plates. The movable plate has a horizontally arranged pull rod on the side closer to the fixed plate. The end of the pull rod away from the movable plate can move through the fixed plate and extend to the side of the fixed plate away from the movable plate. The fixed plate has a through hole for the pull rod to move.

[0031] Preferably, a limiting block is provided at the bottom of the movable plate, and a limiting groove is provided at the top of the clamping housing for the limiting block to move.

[0032] Preferably, the locking mechanism further includes a second spring and a handle;

[0033] The number of second springs is the same as the number of pull rods, and they are fitted onto the outside of the pull rods in a one-to-one correspondence. One end of the second spring abuts against the side wall of the fixed plate, and the other end of the second spring abuts against the side wall of the movable plate.

[0034] The handle is located on the side of the fixed plate away from the movable plate, between two levers, and the ends of the two levers are fixedly connected to the two sides of the handle respectively.

[0035] The advantages of this application compared to the prior art are:

[0036] 1. This application enables the nail remover to be quickly assembled and disassembled through the cooperation of the transmission mechanism, clamping plate and bearing plate, and further secures the nail remover through the locking mechanism.

[0037] 2. This application utilizes the cooperation of annular slide rail, annular sliding fixture and linear slide rail to enable the nail remover to be adjusted to any angle, thereby increasing the adjustment range of the nail remover. Attached Figure Description

[0038] Figure 1 A three-dimensional structural diagram of an automatic screw removal device for bone treatment. Figure 1 ;

[0039] Figure 2 This is a top view of an automated screw removal device for bone treatment.

[0040] Figure 3This is a front view of an automatic screw removal device for bone treatment.

[0041] Figure 4 An automatic screw removal device for bone treatment Figure 3 Sectional view at point AA along the middle;

[0042] Figure 5 A partial left view of an automatic screw-removing device for bone treatment;

[0043] Figure 6 A schematic diagram of a partial three-dimensional structure of an automatic screw removal device for bone treatment. Figure 1 ;

[0044] Figure 7 A local three-dimensional structural decomposition of an automatic screw removal device for bone treatment Figure 1 ;

[0045] Figure 8 A local three-dimensional structural decomposition of an automatic screw removal device for bone treatment Figure 2 ;

[0046] Figure 9 A schematic diagram of a partial three-dimensional structure of an automatic screw removal device for bone treatment. Figure 2 ;

[0047] Figure 10 This is a partial front view of the transmission mechanism of an automatic screw-removing device for bone treatment;

[0048] Figure 11 This is a partial three-dimensional exploded view of the transmission mechanism of an automatic nail removal device for bone treatment.

[0049] The diagram is labeled: 1 - Workbench;

[0050] 12-Plug-in part; 13-Orthopedic support; 14-Linear slide rail; 141-Hinge seat;

[0051] 2- Nail remover;

[0052] 21-Sleeve; 211-Collar;

[0053] 3-Arc-shaped slide rail;

[0054] 31-Moving fixture; 311-Drive housing; 312-Rotary motor; 313-Roller; 3131-Rotating shaft; 314-Arc-shaped slider; 315-Positioning mechanism; 3151-Sleeve; 3152-Ball bearing; 3153-First spring; 3154-Abutting plate; 3155-Locking bolt; 32-Arc-shaped track; 33-Snap-fit ​​part; 34-Arc-shaped groove; 35-Arc-shaped block; 351-Groove;

[0055] 4-Clamping device;

[0056] 41-Bearing plate; 411-Through hole; 412-Annular placement groove; 42-Clamping plate; 43-Transmission mechanism; 431-Clamping housing; 4311-First moving clearance opening; 4312-Second moving clearance opening; 432-Vertical plate; 4321-First rack; 4322-Strip-shaped limiting groove; 4323-Guide post; 433-Horizontal plate; 4331-Second rack; 43311-Limiting strip; 43312-Limiting slide; 434-Gear; 435-Reset spring; 44-Locking mechanism; 441-Moving plate; 4411-Limiting block; 4412-Limiting groove; 442-Fixed plate; 443-Smooth rod; 444-Inverted L-shaped slide groove; 445-Pull rod; 446-Second spring; 447-Handle. Detailed Implementation

[0057] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0058] See Figures 1 to 11 As shown, an automatic nail removal device for bone treatment includes a nail remover 2 and a worktable 1, as well as an orthopedic support 13 and a linear slide rail 14 respectively mounted on the worktable 1. The linear slide rail 14 is located on one side of the orthopedic support 13. A movable slider that can move along the linear slide rail 14 is provided on the movable slider. A hinge seat 141 is provided on the movable slider. An arc-shaped slide rail 3 that can be rotated is hinged on the hinge seat 141. A locking part 33 is provided at the end of the arc-shaped slide rail 3. The worktable 1 is provided with a plug-in part 12 for the locking part 33 to be inserted and engaged. The arc-shaped slide rail 3 has at least one pair of... Symmetrically arranged on both sides of the hinge seat 141, the arc-shaped slide rail 3 is provided with a movable fixture 31. The two movable fixtures 31 are symmetrically arranged, and a support plate 41 for vertically placing the nail picker 2 is provided between the two movable fixtures 31. The nail picker 2 is provided with a sleeve 21 that is inserted and cooperates with the support plate 41. A clamping plate 42 that can clamp the sleeve 21 is provided above the support plate 41. The movable fixture 31 is provided with a transmission mechanism 43. The support plate 41 and the two clamping plates 42 are respectively connected to the internal transmission mechanism 43. A locking mechanism 44 is also provided inside the transmission mechanism 43.

[0059] The nail remover 2 is placed vertically on the support plate 41. Due to the weight of the nail remover 2 itself, the support plate 41 moves downward. At this time, the two clamping plates 42 automatically clamp the outside of the nail remover 2 through the transmission mechanism 43.

[0060] After the two clamping plates 42 clamp the outside of the nail remover 2, the locking mechanism 44 can lock the two clamping plates 42, making the nail remover 2 more stable when working. At the same time, when it is necessary to remove the nail remover 2, simply loosen the locking mechanism 44 and the nail remover 2 can be easily taken out, which facilitates the disassembly and assembly of the nail remover 2.

[0061] Once the nail remover 2 is fixed, it moves along the annular slide rail via the annular sliding fixture, causing the nail remover 2 to move along the direction of movement of the annular slide rail. This allows the nail remover 2 to be adjusted in a circular manner, and at the same time, it works in conjunction with the linear slide rail 14 to increase the adjustment range of the nail remover 2.

[0062] See Figure 4 , Figure 6 and Figure 8 As shown, the moving fixture 31 includes a drive housing 311, a rotary motor 312, a roller 313, and an arc-shaped slider 314;

[0063] The drive housing 311 is sleeved on the arc-shaped slide rail 3, and the drive housing 311 has openings on both sides to avoid the arc-shaped slide rail 3.

[0064] The roller 313 is vertically disposed inside the drive housing 311. The arc-shaped slide rail 3 is provided with an arc-shaped track 32 for the roller 313 to move. The two sides of the arc-shaped track 32 are open. The center of the roller 313 is provided with a rotating shaft 3131. The rotating shaft 3131 is arranged horizontally. The two ends of the rotating shaft 3131 pass through the two sides of the arc-shaped track 32 and are axially connected to the two sides of the inside of the drive housing 311.

[0065] The rotary motor 312 is disposed outside the drive housing 311, and the output shaft of the rotary motor 312 is connected to one end of the rotating shaft 3131 for transmission.

[0066] The arc-shaped slider 314 is located at the bottom of the inner part of the drive housing 311, and the lower end of the arc-shaped slide rail 3 is provided with an arc-shaped groove 34 for the arc-shaped slider 314 to slide.

[0067] When the angle of the nail remover 2 needs to be adjusted, the roller 313 is driven to rotate by the rotary motor 312. The roller 313 moves along the arc track 32 of the arc slide rail 3 and causes the drive housing 311 to move quickly along the arc slide rail 3. During the movement, the arc slider 314 moves along the corresponding arc groove 34 and causes the drive housing 311 to move stably on the arc slide rail 3, while the driver can quickly adjust the angle.

[0068] See Figure 1 , Figure 4 and Figure 6As shown, the movable fixture 31 also includes a positioning mechanism 315, which includes a sleeve 3151, a ball 3152, a first spring 3153, an abutment plate 3154, and a locking bolt 3155.

[0069] The sleeve 3151 is vertically disposed at the top center of the drive housing 311;

[0070] The ball 3152 is rotatably disposed in the inner ring of the sleeve 3151. The bottom of the sleeve 3151 is provided with a limiting part that can restrict one half of the ball 3152 inside the sleeve 3151. The other half of the ball 3152 extends outward through the limiting part. The arc-shaped slide rail 3 is provided with an arc-shaped block 35. The bottom end of the sleeve 3151 faces the upper surface of the arc-shaped block 35. The upper surface of the arc-shaped block 35 is provided with several grooves 351 that are equidistantly distributed along the length direction of the arc-shaped block 35. The protruding part of the ball 3152 matches the shape of the groove 351.

[0071] The first spring 3153 is disposed inside the sleeve 3151, and the bottom end of the first spring 3153 contacts the outside of the ball 3152.

[0072] The abutment plate 3154 is horizontally disposed inside the sleeve 3151 and located at the top of the first spring 3153;

[0073] The locking bolt 3155 is located at the upper end of the sleeve 3151 by means of threaded connection, and the working end of the locking bolt 3155 is rotatably connected to the center of the abutment plate 3154.

[0074] After the nail extractor 2 is adjusted, the operator rotates the locking bolt 3155, which compresses the spring inside the sleeve 3151 through the abutment plate 3154. The compressed spring presses against the ball bearing 3152, fixing the ball bearing 3152 in the groove 351 on the limiting ring. When the nail extractor 2 is adjusted, to prevent the nail extractor 2 from adjusting too quickly, which would result in an excessively large adjustment angle and make the angle of the nail extractor 2 difficult to control, the ball bearing 3152 cooperates with the groove 351 on the limiting ring to provide friction when the nail extractor 2 is adjusted. This prevents the drive housing 311 from sliding too quickly on the arc-shaped slide rail 3 and avoids the technical problem of the nail extractor 2's angle being difficult to control.

[0075] See Figure 9 As shown, the bearing plate 41 is provided with a through hole 411 through which the working end of the nail remover 2 passes, and the lower end of the sleeve 21 is provided with a collar 211. The diameter of the through hole 411 is smaller than the diameter of the collar 211, and the bearing plate 41 is provided with an annular placement groove 412 that matches the collar 211.

[0076] When the nail remover 2 needs to be installed, the working end of the nail remover 2 passes through the through hole 411 on the support plate 41, so that the collar 211 on the nail remover 2 is placed in the annular placement groove 412 on the support plate 41, so that the collar 211 matches the annular placement groove 412, so that the nail remover 2 can be quickly placed on the support plate 41.

[0077] See Figure 1 , Figure 5 , Figure 9 , Figure 10 and Figure 11 As shown, the transmission mechanism 43 includes a clamping housing 431, a vertical plate 432, a horizontal plate 433, a gear 434, and a return spring 435;

[0078] The clamping housing 431 is vertically detachable and located on the side of the drive housing 311 away from the rotary motor 312;

[0079] The vertical plate 432 is vertically disposed inside the clamping housing 431. The length of the vertical plate 432 is greater than the height of the clamping housing 431. The upper and lower ends of the vertical plate 432 extend outward through the upper and lower ends of the clamping housing 431, respectively. The upper and lower ends of the clamping housing 431 are respectively provided with a first moving clearance opening 4311 for the vertical plate 432 to slide. The lower end of the vertical plate 432 is fixedly connected to one side of the bearing plate 41.

[0080] The horizontal plates 433 are a pair and are respectively provided on both sides of the clamping housing 431. The clamping housing 431 has a second moving clearance opening 4312 on both sides for the corresponding horizontal plates 433 to slide. The two horizontal plates 433 are located behind the vertical plate 432. The ends of the two horizontal plates 433 away from the clamping housing 431 are respectively connected to the two clamping plates 42 through connecting plates.

[0081] Gear 434 is horizontally positioned at the center of the clamping housing 431. The center of gear 434 is rotatably connected to the inner wall of clamping housing 431 via a rotating rod. Gear 434 passes through vertical plate 432 and two horizontal plates 433. Gear 434 is divided into a front end body and a rear end body. Vertical plate 432 has a vertical through-hole to avoid gear 434. A first rack 4321 is vertically positioned and can mesh with gear 434 in the vertical opening of vertical plate 432. A second rack 4331 is horizontally extended and can mesh with gear 434 on the side of horizontal plate 433 facing gear 434. The second racks 4331 on the two horizontal plates 433 are arranged crosswise above and below gear 434.

[0082] The return spring 435 is vertically disposed inside the clamping housing 431. The top end of the return spring 435 is fixedly connected to the upper end of the inside of the clamping housing 431, and the bottom end of the return spring 435 is fixedly connected to the lower outer wall of the vertical plate 432 located inside the clamping housing 431.

[0083] When the nail remover 2 is placed on the support plate 41, the weight of the nail remover 2 itself causes the vertical plate 432 to move downward. The first rack 4321 on the vertical plate 432 will drive the gear 434 to rotate clockwise. The gear 434 will simultaneously drive the two second racks 4331 and the corresponding two horizontal plates 433 to move in the direction of the gear 434. The two horizontal plates 433 will drive the corresponding two clamping plates 42 to move closer to each other, so that the two clamping plates 42 will clamp the outer wall of the sleeve 21 respectively.

[0084] When the nail remover 2 needs to be disassembled, the user removes the nail remover 2 from the support plate 41. After removal, the elastic force of the return spring 435 causes the vertical plate 432 to automatically return to its original position. At the same time, the first rack 4321 drives the gear 434 to rotate counterclockwise. The counterclockwise rotation of the gear 434 drives the two second racks 4331 to return to their original positions, causing the two horizontal plates 433 to automatically extend to both sides of the clamping housing 431. This also causes the two clamping plates 42 to disengage from the sleeve 21, allowing the nail remover 2 to be easily removed.

[0085] See Figure 10 and Figure 11 As shown, the vertical plate 432 has symmetrically arranged strip-shaped limiting grooves 4322 distributed along the vertical direction of the vertical plate 432 on both sides. The clamping housing 431 has a guide post 4323 inside that can limit the movement within each strip-shaped limiting groove 4322. The two second racks 4331 are provided with limiting strips 43311 on the side away from the gear 434 respectively. The clamping housing 431 has a limiting slide 43312 inside that allows each limiting strip 43311 to move horizontally.

[0086] When the vertical plate 432 moves up and down, each guide post 4323 provided in the clamping housing 431 moves along the corresponding strip-shaped limiting groove 4322 on the vertical plate 432, making the vertical plate 432 more stable during the movement.

[0087] When the two horizontal plates 433 are moving, the limiting strip 43311 on the second rack 4331 moves along the corresponding limiting slide 43312 inside the clamping housing 431, making the horizontal plates 433 more stable during the movement.

[0088] See Figure 9 As shown, the clamping plate 42 is semi-arc in shape. The two clamping plates 42 can wrap the outside of the sleeve 21. A rubber pad is attached to the inner wall of the clamping fixture.

[0089] When the sleeve 21 outside the nail remover 2 is fixed by the two clamping plates 42, the outside of the sleeve 21 can be completely wrapped by the semi-circular clamping plates 42, and the clamping effect is better by the action of the rubber pad.

[0090] See Figure 5 and Figure 9 As shown, 8. An automatic nail removal device for bone treatment according to claim 1, characterized in that the locking mechanism 44 includes a movable plate 441 and a fixed plate 442;

[0091] The fixing plate 442 is vertically disposed on one side of the top of the clamping housing 431;

[0092] The movable plates 441 are provided in pairs and mirror images of each other on both sides of the vertical plate 432. The vertical plate 432 is provided with inverted L-shaped moving grooves distributed along the vertical direction of the vertical plate 432. A smooth rod 443 that can move in the inverted L-shaped moving groove is provided between the two movable plates 441. The two ends of the smooth rod 443 are respectively axially connected to the side walls of the two movable plates 441. A horizontally arranged pull rod 445 is provided on the side of the movable plate 441 near the fixed plate 442. The end of the pull rod 445 away from the movable plate 441 can move through the fixed plate 442 and extend to the side of the fixed plate 442 away from the movable plate 441. The fixed plate 442 is provided with a through hole for the pull rod 445 to move.

[0093] When the vertical plate 432 moves downward, the guide rod 443 moves along the inverted L-shaped moving groove on the vertical plate 432. The inverted L-shaped moving groove includes a vertical groove and a horizontal groove. The horizontal groove is located at the upper end of the vertical plate 432. When the guide rod 443 moves to the upper end of the inverted L-shaped moving groove, the movable plate 441 is moved horizontally by the pull rod 445, so that the guide rod 443 moves into the horizontal groove of the inverted L-shaped moving groove and locks the vertical plate 432 to prevent the vertical plate 432 from shaking up and down. When the vertical plate 432 is locked, all the horizontal plates 433 are in the locked state.

[0094] See Figure 9 As shown, a limiting block 4411 is provided at the bottom of the movable plate 441, and a limiting groove 4412 for the limiting block 4411 to move is provided at the top of the clamping housing 431.

[0095] When the movable plate 441 moves, the limiting block 4411 provided at the bottom of the movable plate 441 moves along the limiting groove 4412 on the clamping housing 431, so that the movable plate 441 will not shake when it moves.

[0096] See Figure 9 As shown, the locking mechanism also includes a second spring 446 and a handle 447;

[0097] The number of second springs 446 is the same as the number of pull rods 445, and they are sleeved on the outside of the pull rods 445 in a one-to-one correspondence. One end of the second spring 446 abuts against the side wall of the fixed plate 442, and the other end of the second spring 446 abuts against the side wall of the movable plate 441.

[0098] Handle 447 is located on the side of fixed plate 442 away from movable plate 441. Handle 447 is located between two pull rods 445. The ends of the two pull rods 445 are fixedly connected to the two sides of handle 447 respectively.

[0099] When the vertical plate 432 moves upward, the guide rod 443 moves to the highest position along the inverted L-shaped moving groove on the vertical plate 432. When the guide rod 443 aligns with the horizontal groove on the inverted L-shaped moving groove, the elastic force of the spring pushes the movable plate 441 to move horizontally. The two movable plates 441 drive the guide rod 443 to move along the horizontal groove on the inverted L-shaped moving groove, enabling the guide rod 443 to move automatically and achieving the effect of automatic locking.

[0100] This application enables the nail remover 2 to be quickly assembled and disassembled through the cooperation of the transmission mechanism 43, the clamping plate 42 and the bearing plate 41, and further secures the nail remover 2 through the locking mechanism 44; through the cooperation of the annular slide rail, the annular sliding fixture and the linear slide rail 14, the nail remover 2 can be adjusted to any angle, increasing the adjustment range of the nail remover 2.

[0101] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An automatic nail removal device for bone treatment, comprising a nail remover (2) and a worktable (1), and an orthopedic support (13) and a linear slide rail (14) respectively mounted on the worktable (1), characterized in that, The linear slide rail (14) is located on one side of the orthopedic support (13). The linear slide rail (14) is provided with a movable slider that can move along the linear slide rail (14). The movable slider is provided with a hinge seat (141). The hinge seat (141) is hinged with an arc-shaped slide rail (3) that can be flipped. The end of the arc-shaped slide rail (3) is provided with a snap-fit ​​part (33). The worktable (1) is provided with a snap-fit ​​part (12) for the snap-fit ​​part (33) to be inserted and fitted. The arc-shaped slide rail (3) is provided with at least one pair and is symmetrically arranged on both sides of the hinge seat (141). The arc-shaped slide rail (3) is provided with a movable fixture (31). Two movable fixtures (31) are symmetrically arranged. A support plate (41) for vertically placing a nail remover (2) is provided between the two movable fixtures (31). A sleeve (21) that is inserted and matched with the support plate (41) is provided on the outside of the nail remover (2). A clamping plate (42) that can clamp the outside of the sleeve (21) is provided on the top of the support plate (41). A transmission mechanism (43) is provided on the movable fixtures (31). The support plate (41) and the two clamping plates (42) are respectively connected to the internal transmission of the transmission mechanism (43). A locking mechanism (44) is also provided inside the transmission mechanism (43). The transmission mechanism (43) includes a clamping housing (431), a vertical plate (432), a horizontal plate (433), a gear (434), and a return spring (435). The vertical plate (432) is vertically disposed inside the clamping housing (431), and the lower end of the vertical plate (432) is fixedly connected to one side of the bearing plate (41). There is a pair of horizontal plates (433), which are respectively disposed through both sides of the clamping housing (431). The ends of the two horizontal plates (433) away from the clamping housing (431) are respectively connected to the two clamping plates (42) through connecting plates. The gear (434) is horizontally disposed on the clamping housing (431). At the center of the interior of 31), the vertical plate (432) is provided with a vertical through-hole for the avoidance gear (434). The vertical opening of the vertical plate (432) is provided with a first rack (4321) that is vertical and can mesh with the gear (434). The horizontal plate (433) is provided with a second rack (4331) that extends horizontally and can mesh with the gear (434) on the side facing the gear (434). The second racks (4331) on the two horizontal plates (433) are arranged crosswise above and below the gear (434). The return spring (435) is vertically arranged inside the clamping housing (431).

2. The automatic screw removal device for bone treatment according to claim 1, characterized in that, The moving fixture (31) includes a drive housing (311), a rotary motor (312), a roller (313), and an arc-shaped slider (314). The drive housing (311) is fitted onto the arc-shaped slide rail (3), and the drive housing (311) has openings on both sides to avoid the arc-shaped slide rail (3); The roller (313) is vertically arranged inside the drive housing (311). The arc-shaped slide rail (3) is provided with an arc-shaped track (32) for the roller (313) to move. The two sides of the arc-shaped track (32) are open. The center of the roller (313) is provided with a rotating shaft (3131). The rotating shaft (3131) is arranged horizontally. The two ends of the rotating shaft (3131) pass through the two sides of the arc-shaped track (32) and are axially connected to the two sides of the inside of the drive housing (311). The rotary motor (312) is located outside the drive housing (311), and the output shaft of the rotary motor (312) is connected to one end of the rotating shaft (3131) for transmission. The arc-shaped slider (314) is located at the bottom of the inside of the drive housing (311), and the lower end of the arc-shaped slide rail (3) is provided with an arc-shaped groove (34) for the arc-shaped slider (314) to slide.

3. The automatic screw removal device for bone treatment according to claim 2, characterized in that, The movable fixture (31) also includes a positioning mechanism (315), which includes a sleeve (3151), a ball (3152), a first spring (3153), an abutment plate (3154), and a locking bolt (3155). The sleeve (3151) is vertically disposed at the top center of the drive housing (311); The ball (3152) is rotatably disposed in the inner ring of the sleeve (3151). The bottom of the sleeve (3151) is provided with a limiting part that can restrict one half of the ball (3152) inside the sleeve (3151). The other half of the ball (3152) extends outward through the limiting part. The arc-shaped slide rail (3) is provided with an arc-shaped block (35). The bottom end of the sleeve (3151) faces the upper surface of the arc-shaped block (35). The upper surface of the arc-shaped block (35) is provided with several grooves (351) that are equidistantly distributed along the length direction of the arc-shaped block (35). The protruding part of the ball (3152) matches the shape of the groove (351). The first spring (3153) is located inside the sleeve (3151), and the bottom end of the first spring (3153) is in contact with the outside of the ball (3152). The abutment plate (3154) is horizontally disposed inside the sleeve (3151) and located at the top of the first spring (3153); The locking bolt (3155) is located at the upper end of the sleeve (3151) by means of threaded connection, and the working end of the locking bolt (3155) is rotatably connected to the center of the abutment plate (3154).

4. The automatic screw removal device for bone treatment according to claim 1, characterized in that, The bearing plate (41) is provided with a through hole (411) through which the working end of the nail remover (2) passes. The lower end of the sleeve (21) is provided with a collar (211). The diameter of the through hole (411) is smaller than the diameter of the collar (211). The bearing plate (41) is provided with an annular placement groove (412) that matches the collar (211).

5. An automatic screw removal device for bone treatment according to claim 1, characterized in that, The clamping housing (431) is vertically detachable and located on the side of the drive housing (311) away from the rotary motor (312). The length of the vertical plate (432) is greater than the height of the clamping housing (431). The upper and lower ends of the vertical plate (432) extend outward through the upper and lower ends of the clamping housing (431), respectively. The upper and lower ends of the clamping housing (431) are respectively provided with first sliding clearance openings (4311) for the vertical plate (432) to slide. The two sides of the clamping housing (431) are respectively provided with second sliding clearance openings for the corresponding horizontal plates (433). (4312), two horizontal plates (433) are located behind the vertical plate (432). The center of the gear (434) is rotatably connected to the inner wall of the clamping housing (431) through a rotating rod. The gear (434) passes through the vertical plate (432) and the two horizontal plates (433) respectively. The gear (434) is divided into a front end body and a rear end body. The top end of the return spring (435) is fixedly connected to the upper end of the inside of the clamping housing (431). The bottom end of the return spring (435) is fixedly connected to the lower outer wall of the vertical plate (432) inside the clamping housing (431).

6. An automatic screw removal device for bone treatment according to claim 5, characterized in that, The vertical plate (432) has symmetrically arranged strip-shaped limiting grooves (4322) distributed along the vertical direction of the vertical plate (432) on both sides. The clamping housing (431) has guide posts (4323) that can limit movement within each strip-shaped limiting groove (4322). Each of the two second racks (4331) has a limiting strip (43311) on the side away from the gear (434). The clamping housing (431) has a limiting slide (43312) inside for each limiting strip (43311) to move horizontally.

7. An automatic screw removal device for bone treatment according to claim 1, characterized in that, The clamping plate (42) is semi-arc in shape. The two clamping plates (42) can wrap the outside of the sleeve (21). A rubber pad is attached to the inner wall of the clamping fixture.

8. An automatic screw removal device for bone treatment according to claim 1, characterized in that, The locking mechanism (44) includes a movable plate (441) and a fixed plate (442). The fixing plate (442) is vertically disposed on one side of the top of the clamping housing (431); The movable plate (441) is provided with a pair of mirror images on both sides of the vertical plate (432). The vertical plate (432) is provided with an inverted L-shaped moving groove distributed along the vertical direction of the vertical plate (432). A smooth rod (443) that can move in the inverted L-shaped moving groove is provided between the two movable plates (441). The two ends of the smooth rod (443) are respectively axially connected to the side walls of the two movable plates (441). A horizontally arranged pull rod (445) is provided on the side of the movable plate (441) near the fixed plate (442). The end of the pull rod (445) away from the movable plate (441) can move through the fixed plate (442) and extend to the side of the fixed plate (442) away from the movable plate (441). The fixed plate (442) is provided with a through hole for the pull rod (445) to move.

9. An automatic screw removal device for bone treatment according to claim 8, characterized in that, The bottom of the movable plate (441) is provided with a limiting block (4411), and the top of the clamping housing (431) is provided with a limiting groove (4412) for the limiting block (4411) to move.

10. An automatic screw removal device for bone treatment according to claim 8, characterized in that, The locking mechanism also includes a second spring (446) and a handle (447). The number of second springs (446) is the same as the number of pull rods (445) and they are fitted onto the outside of the pull rods (445) in a one-to-one correspondence. One end of the second spring (446) abuts against the side wall of the fixed plate (442), and the other end of the second spring (446) abuts against the side wall of the movable plate (441). The handle (447) is located on the side of the fixed plate (442) away from the movable plate (441). The handle (447) is located between two pull rods (445), and the ends of the two pull rods (445) are fixedly connected to the two sides of the handle (447) respectively.

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