Femoral intertrochanteric fracture reduction device

Abstract

The invention relates to a femoral intertrochanteric fracture reduction device. The femoral intertrochanteric fracture reduction device comprises an operating handle, a corrector and a driving mechanism, wherein the corrector is rotatably connected to the operating handle and used for bone reduction; the driving mechanism is arranged on the operating handle and connected with the corrector to drive the corrector to swing; the operating handle comprises a shell with a handle and a shell without a handle which are fixed with each other, and a handle part is outwards formed on one side of the shell with the handle; the side, opposite to the handle part, of the shell with the handle and the corresponding side of the shell without the handle outwards form extending strips which are symmetrically arranged, and the two extending strips are fixed to each other. The driving mechanism comprises a driving part arranged between the shell with the handle and the shell without the handle, and two traction ropes which are arranged between the two extension strips and are distributed up and down; according to the invention, the difficulty of bone movement is greatly reduced, so that the operation is greatly facilitated to achieve the effect of saving time and labor, and meanwhile, the resetting effect and accuracy are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a femoral intertrochanteric fracture reduction device. Background Art

[0002] Intertrochanteric fracture refers to a fracture between the base of the femoral neck and the lesser trochanter, which is common in the elderly. Since the bone is broken and easily displaced after an intertrochanteric fracture, in addition to treating the fracture, the displaced bone must also be repositioned. Existing conventional repositioning methods mostly involve inserting surgical forceps into the patient's body, then clamping the bone and slowly moving it to reposition it. However, the longitudinal force between the surgical forceps and the bone is small and cannot pry up the bone, so it is difficult to move the bone and other tools must be used to assist in repositioning. Therefore, the operation is extremely inconvenient, time-consuming and labor-intensive, and the repositioning effect and accuracy are low. Therefore, it is urgently in need of a solution. Summary of the Invention

[0003] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a femoral intertrochanteric fracture reduction device that can greatly reduce the difficulty of bone movement, thereby greatly facilitating operation to achieve the effect of saving time and effort, while effectively improving the reduction effect and accuracy.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a femoral intertrochanteric fracture reduction device, characterized by comprising an operating handle, a corrector rotatably connected to the operating handle for bone reduction, and a driving mechanism provided on the operating handle and connected to the corrector to drive the corrector to swing;

[0005] The operating handle comprises a housing with a handle and a housing without a handle fixed to each other, and a handle portion is formed outwardly on one side of the housing with a handle;

[0006] A side of the housing with a handle opposite to the handle portion and a corresponding side of the housing without a handle are both formed outwardly with an extension strip symmetrically arranged with each other, and the two extension strips are fixed to each other;

[0007] The driving mechanism includes an active part arranged between the shell with a handle and the shell without a handle, and two traction ropes arranged between the two extension bars and distributed up and down; the corrector includes a toggle block rotatably connected between the ends of the two extension bars for insertion into the bone joint; one end of the two traction ropes is connected to the rotating side of the toggle block, and the other end of the two traction ropes is connected to the active part.

[0008] Preferably, the corrector also includes a pin shaft vertically and rotatably connected between the ends of the two extension bars, the toggle block is vertically fixed on one side outer wall of the pin shaft, and one end of the two traction ropes are both wound around the pin shaft and the winding directions are opposite to each other.

[0009] Preferably, the active part includes a first rotating shaft and a second rotating shaft that are laterally and rotatably connected between the handle shell and the inside of the non-handle shell and are parallel to each other, a first gear and a second gear that are concentrically fixed on the first rotating shaft and the second rotating shaft and mesh with each other, and a first hand wheel and a second hand wheel that are concentrically fixed at one end of the first rotating shaft and the second rotating shaft and are both located outside the handle shell or the non-handle shell, and the other ends of the two traction ropes are respectively wound around the first rotating shaft and the second rotating shaft and the winding direction is the same.

[0010] Preferably, the housing with a handle or the housing without a handle is also provided with a locking unit that cooperates with the first rotating shaft or the second rotating shaft, and the locking unit includes a third gear concentrically fixed on the first rotating shaft or the second rotating shaft, two locking arms that are rotatably elastically connected to the inside of the housing with a handle or the housing without a handle and symmetrically arranged on one side of the outer periphery of the third gear, a traction shaft that is laterally and rotatably inserted and connected in the housing with a handle or the housing without a handle, a cam fixed on the traction shaft and located between the two locking arms, and a switching block fixed at one end of the traction shaft and located outside the housing with a handle or the housing without a handle, the swinging ends of the two locking arms always have a tendency to rotate toward the third gear; a positioning tooth that cooperates with the tooth groove of the third gear is formed on the swinging end of the locking arm facing the third gear.

[0011] Preferably, the locking unit also includes a locator that cooperates with the cam, and the locator includes a steel ball that is movably arranged under the cam to have the function of elastically moving up and down. Correspondingly, two notch grooves that cooperate with the steel ball are provided on the outer wall of the large head end of the cam.

[0012] Preferably, an adjustment unit is further provided between the operating handle and the corrector, the adjustment unit comprising an adjustment shaft laterally and rotatably connected between the two extension bars, a third handwheel concentrically fixed on the adjustment shaft at one end away from the corrector, an extension plate movably arranged inside the toggle block to have the function of translating back and forth along the length direction of the toggle block, a first rocker arm rotatably connected to a side of the extension plate close to the adjustment shaft, and a second rocker arm rotatably connected to an end of the adjustment shaft close to the toggle block, the end of the second rocker arm is rotatably connected to the end of the first rocker arm, the root rotation centerline of the first rocker arm and the end rotation centerline of the second rocker arm are parallel to each other, and the root rotation centerline of the second rocker arm cooperates with the rotation centerline of the pin shaft.

[0013] Preferably, it also includes a telescopic rod, a flat groove is provided inside the toggle block, the extension plate is movably arranged in the flat groove, a positioning groove is provided on the outer wall of the pin shaft facing the adjusting shaft, the end of the adjusting shaft close to the toggle block extends into the positioning groove, and a cavity hole is provided on the bottom surface of the positioning groove which is interconnected with the inside of the flat groove, and the second rocker arm is inserted into the cavity hole.

[0014] Preferably, a groove hole symmetrically distributed with respect to each other is provided on the outer wall of the root of the two extension strips, and the third hand wheel is movably inserted into the two groove holes.

[0015] Preferably, a sleeve is fixed inside the shell with a handle or the shell without a handle, and the locator is arranged in the sleeve. The locator also includes a base movably arranged inside the sleeve and a first spring fixed at the bottom of the base and located inside the sleeve. The end of the first spring is pressed tightly against the bottom of the sleeve, and the steel ball is fixed at the top of the base.

[0016] Compared with the existing technology, the advantages of the present invention are: the present invention can quickly insert the corrector into the position of the bone with the help of the unrotated corrector, and then can easily pry up the displaced bone, and can also accurately move the displaced bone laterally and slowly in the predetermined direction with the help of the rotated corrector to achieve reduction, thereby greatly reducing the difficulty of bone movement, and can independently complete the reduction without the assistance of other tools, thereby greatly facilitating the operation to achieve the effect of saving time and effort, and effectively improving the reduction effect and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is an exploded structural diagram of the operating handle of the present invention;

[0020] Figure 3 is an exploded structural diagram of the corrector and adjustment unit of the present invention;

[0021] Figure 4 This is an exploded structural diagram of the active component and the locking unit of the present invention;

[0022] Figure 5 This is an exploded structural diagram of the locking unit of the present invention;

[0023] Figure 6 It is a schematic structural diagram of the locking arm and the second spring of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the cam of the present invention;

[0025] Figure 8Schematic diagram of the structure of the positioner of the present invention;

[0026] Figure 9 It is a structural schematic diagram of the sleeve of the present invention.

[0027] Explanation of the Figure Numbers: 1. Operating handle; 11. Housing without handle; 12. Extension bar; 13. Slot; 14. Sleeve; 15. Guide groove; 16. Steering groove; 17. Handle; 18. Housing with handle; 2. Corrector; 21. Pin; 211. Positioning groove; 212. Cavity; 22. First annular groove; 23. Toggle block; 3. Traction rope; 4. Active member; 41. First gear; 42. Second gear; 43. First rotating shaft; 44. Second rotating shaft; 431. Second annular groove; 4 41. Third annular groove; 45. First hand wheel; 46. Second hand wheel; 5. Locking unit; 51. Third gear; 52. Locking arm; 521. Positioning tooth; 53. Traction shaft; 54. Cam; 541. Notch groove; 55. Switching block; 56. Positioner; 561. Steel ball; 562. Base; 563. First spring; 57. Second spring; 7. Adjusting unit; 71. Adjusting shaft; 72. Third hand wheel; 73. Second rocker arm; 74. First rocker arm; 75. Extension plate 75. DETAILED DESCRIPTION

[0028] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meanings understood by persons of ordinary skill in the art to which the invention pertains. The terms "first," "second," and similar terms used herein do not denote any order, quantity, or importance; they are merely used to distinguish between different components. Terms such as "include" or "comprising" mean that the element or object preceding the term includes the elements or objects listed after the term, and their equivalents, without excluding other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used solely to indicate relative positional relationships; changes in the absolute position of the described objects may also change the relative positional relationship. The term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " as used herein generally indicates an "or" relationship between the related objects.

[0029] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0030] like Figures 1 to 9As shown, a femoral intertrochanteric fracture reduction device includes an operating handle 1, a corrector 2 rotatably connected to the operating handle 1 for bone reduction, and a driving mechanism provided on the operating handle 1 and connected to the corrector 2 to drive the corrector 2 to swing;

[0031] The operating handle 1 includes a handle housing 18 and a non-handle housing 11 fixed to each other. A handle portion 17 is formed outwardly on one side of the handle housing 18. The handle portion 17 makes it easier for the doctor to hold the reduction device, thereby facilitating the doctor to hold the reduction device and perform bone reduction operations.

[0032] On one side of the housing 18 with a handle opposite to the handle portion 17 and on the corresponding side of the housing 11 without a handle, there are formed outwards an extension strip 12 symmetrically arranged with each other, and the two extension strips 12 are fixed to each other;

[0033] The driving mechanism includes an active part 4 arranged between the handle shell 18 and the handleless shell 11, and two traction ropes 3 arranged between the two extension bars 12 and distributed up and down; the corrector 2 includes a toggle block 23 rotatably connected between the ends of the two extension bars 12 for insertion into the bone joint; one end of the two traction ropes 3 is connected to the rotating side of the toggle block 23, and the other end of the two traction ropes 3 is connected to the active part 4.

[0034] The corrector 2 also includes a pin shaft 21 vertically and rotatably connected between the ends of the two extension bars 12, and a toggle block 23 is vertically fixed on one side outer wall of the pin shaft 21. One end of the two traction ropes 3 are both wound around the pin shaft 21 and the winding directions are opposite to each other.

[0035] The active part 4 includes a first rotating shaft 43 and a second rotating shaft 44 which are laterally and rotatably connected between the handle housing 18 and the inside of the non-handle housing 11 and are parallel to each other, a first gear 41 and a second gear 42 which are concentrically fixed on the first rotating shaft 43 and the second rotating shaft 44 and mesh with each other, and a first hand wheel 45 and a second hand wheel 46 which are concentrically fixed at one end of the first rotating shaft 43 and the second rotating shaft 44 and are both located outside the handle housing 18 or the non-handle housing 11. The other ends of the two traction ropes 3 are respectively wound around the first rotating shaft 43 and the second rotating shaft 44 and are wound in the same direction.

[0036] The housing with handle 18 or the housing without handle 11 is also provided with a locking unit 5 that cooperates with the first rotating shaft 43 or the second rotating shaft 44. The locking unit 5 includes a third gear 51 concentrically fixed on the first rotating shaft 43 or the second rotating shaft 44, two locking arms 52 that are rotatably elastically connected to the interior of the housing with handle 18 or the housing without handle 11 and are symmetrically arranged on one side of the outer periphery of the third gear 51, a traction shaft 53 that is laterally and rotatably inserted and connected in the housing with handle 18 or the housing without handle 11, a cam 54 fixed on the traction shaft 53 and located between the two locking arms 52, and a switching block 55 fixed at one end of the traction shaft 53 and located outside the housing with handle 18 or the housing without handle 11. The swinging ends of the two locking arms 52 always have a tendency to rotate toward the third gear 51.

[0037] A positioning tooth 521 that cooperates with the tooth groove of the third gear 51 is formed on the side of the swing end of the locking arm 52 facing the third gear 51 .

[0038] The locking unit 5 also includes a locator 56 that cooperates with the cam 54. The locator 56 includes a steel ball 561 that is movably arranged below the cam 54 to have the function of elastically moving up and down. Correspondingly, two notch grooves 541 that cooperate with the steel ball 561 are provided on the outer wall of the large end of the cam 54.

[0039] An adjustment unit 7 is also provided between the operating handle 1 and the corrector 2. The adjustment unit 7 includes an adjustment shaft 71 that is laterally and rotatably connected between the two extension bars 12, a third hand wheel 72 that is concentrically fixed on the adjustment shaft 71 at one end away from the corrector 2, an extension plate 75 that is movably arranged inside the toggle block 23 to have the function of moving back and forth along the length direction of the toggle block 23, a first rocker arm 74 that is rotatably connected to one side of the extension plate 75 close to the adjustment shaft 71, and a second rocker arm 73 that is rotatably connected to one end of the adjustment shaft 71 close to the toggle block 23, the end of the second rocker arm 73 is rotatably connected to the end of the first rocker arm 74, the root rotation center line of the first rocker arm 74 and the end rotation center line of the second rocker arm 73 are parallel to each other, and the root rotation center line of the second rocker arm 73 cooperates with the rotation center line of the pin shaft 21.

[0040] A flat groove 231 is provided inside the toggle block 23, and the extension plate 75 is movably arranged in the flat groove 231. A positioning groove 211 is provided on the outer wall of the pin shaft 21 on the side facing the adjustment shaft 71, and the end of the adjustment shaft 71 close to the toggle block 23 extends into the positioning groove 211. A cavity 212 is provided on the bottom surface of the positioning groove 211 and is interconnected with the interior of the flat groove 231. The second rocker arm 73 is inserted into the cavity 212.

[0041] A symmetrically distributed slot 13 is formed on the outer wall of the root of each of the two extension bars 12 , and the third hand wheel 72 is movably inserted into the two slots 13 .

[0042] Two guide grooves 15 are arranged on the inner wall of each extension bar 12 and are parallel to each other. The two guide grooves 15 on one extension bar 12 are respectively matched with the two guide grooves 15 on the other extension bar 12, and each traction rope 3 is movably embedded between the two matched guide grooves 15.

[0043] A deflection groove 16 is formed on the inner wall of each extension strip 12 and is located between the two guide grooves 15 and parallel to any one of the guide grooves 15 . The adjustment shaft 71 is movably embedded between the two deflection grooves 16 .

[0044] A sleeve 14 is also fixed inside the shell with a handle 18 or the shell without a handle 11, and a locator 56 is arranged in the sleeve 14. The locator 56 also includes a base 562 movably arranged inside the sleeve 14 and a first spring 563 fixed at the bottom of the base 562 and located inside the sleeve 14. The end of the first spring 563 is pressed tightly against the bottom of the sleeve 14, and the steel ball 561 is fixed at the top of the base 562.

[0045] The locking unit 5 also includes two second springs 57 respectively fixed on the outer wall of the outer side of the locking arm 52. The ends of the two second springs 57 are pressed against the inner wall of the handle shell 18 or the non-handle shell 11 so that the two locking arms 52 always have a tendency to swing toward the direction of the third gear 51.

[0046] Two first annular grooves 22 distributed up and down are provided on the outer wall of the pin shaft 21, and one end of the two traction ropes 3 is respectively wrapped in the two first annular grooves 22. Correspondingly, a second annular groove 431 and a third annular groove 441 are respectively provided on the first rotating shaft 43 and the second rotating shaft 44, and the other ends of the two traction ropes 3 are respectively wrapped in the second annular groove 431 and the third annular groove 441.

[0047] Directions:

[0048] The doctor holds the handle portion 17 with his hand to hold the present invention, and then inserts the corrector 2 into the patient's body through the two extension bars 12 and moves it to the intertrochanteric fracture site of the femur, and then rotates the first hand wheel 45 to drive the first gear 41 to rotate with the help of the first rotating shaft 43, and then drives the second rotating shaft 44 to rotate with the help of the second gear 42 engaged with the first gear 41. When the first rotating shaft 43 wraps around one of the traction ropes 3 connected to it, the traction rope 3 will pull the pin shaft 21 connected to it to rotate, and then can pull the corrector 2 to rotate to one side; since the rotation direction of the second gear 42 is opposite to that of the first gear 41, the rotation directions of the first rotating shaft 43 and the second rotating shaft 44 are also opposite. Therefore, in the above process, the reverse rotation of the second rotating shaft 44 will unwind the other traction rope 3 connected to it at the same speed, and the traction rope 3 will be wound as the pin shaft 21 connected to it rotates until the corrector 2 is rotated 90 degrees.

[0049] Next, the toggle block 23 in the corrector 2 is directed toward the bone crack and the toggle block 23 is inserted into the bone crack, and then the first hand wheel 45 is rotated in the opposite direction to drive the corrector 2 to reverse in the same way. When the corrector 2 rotates, the bone will be pried up with the help of the reversed toggle block 23. Then the doctor moves the corrector 2 with the help of the handle part 17, and then moves the dislocated bone with the help of the toggle block 23, so that the doctor can quickly and easily reposition the dislocated bone, reducing the difficulty of the doctor in bone displacement.

[0050] In the initial state, the positioning teeth 521 on at least one locking arm 52 are stuck in the tooth groove on the third gear 51. At this time, the third gear 51 cannot rotate clockwise but can rotate counterclockwise, thereby preventing the first rotating shaft 43 or the second rotating shaft 44 from rotating, so that the angle of the corrector 2 remains unchanged; when the angle of the corrector 2 needs to be adjusted, the switching block 55 is first manually toggled to drive the traction shaft 53 to rotate, thereby driving the cam 54 to rotate between the two locking arms 52, and then using the large end of the cam 54 to push one of the locking arms 52 locked with the third gear 51 to swing, so that the positioning teeth 521 on the locking arm 52 leave the tooth groove on the third gear 51, and at the same time, the other locking arm 52 is swung toward the direction of the third gear 51, so that the positioning teeth 521 on the other locking arm 52 are stuck in the tooth groove on the third gear 51, so that the corrector 2 can rotate clockwise but cannot rotate counterclockwise, so that the corrector 2 can be locked after rotating a certain angle. When positioning in different rotation directions, it is sufficient to rotate the switching block 55 accordingly.

[0051] After that, the positioner 56 can also position the cam 54. When the cam 54 rotates, if any notch groove 541 rotates to the top of the steel ball 561, the steel ball 561 will automatically embed into the notch groove 541 above it with the help of the rebound force of the first spring 563, so that the cam 54 can stably maintain the positioning state of the current position. When embedded, the cam 54 has a more obvious jerky feedback, so that the doctor can know that the cam 54 has switched successfully.

[0052] It is worth mentioning that: when the contact area of ​​the bone is smaller than the area of ​​the corrector 2, the toggle block 23 is likely to interfere with the surrounding tissues when rotating, so the area of ​​the corrector 2 must be appropriately reduced. At this time, the third hand wheel 72 in the adjustment unit 7 can be turned by hand to drive the adjustment shaft 71 to rotate. In the initial state, the root rotation center line of the second rocker 73 coincides with the rotation center line of the pin 21. When the toggle block 23 rotates, the second rocker 73 will also rotate with the adjustment shaft 71 to make the adjustment shaft 71 slide in the positioning groove 211; when the toggle block 23 stops rotating After that, the rotating adjustment shaft 71 will drive the second rocker arm 73 to swing, and then with the help of the first rocker arm 74, the extension plate 75 is pushed out of the flat groove 231, so that the area of ​​the extension plate 75 extending out of the toggle block 23 is combined with the area of ​​the toggle block 23, thereby increasing the contact area between the corrector 2 and the bone; after use, the adjustment shaft 71 is rotated in the opposite direction to drive the extension plate 75 to retract into the inside of the toggle block 23. When the rotation center line of the root of the second rocker arm 73 coincides with the rotation center line of the pin shaft 21 again, the corrector 2 can be driven to rotate in the opposite direction and reset.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A femoral intertrochanteric fracture reduction device, characterized in that: The invention comprises an operating handle, a corrector rotatably connected to the operating handle for bone reduction, and a driving mechanism provided on the operating handle and connected to the corrector for driving the corrector to swing; The operating handle includes a housing with a handle and a housing without a handle fixed to each other, and a handle portion is formed outwardly on one side of the housing with a handle; A side of the housing with a handle opposite to the handle portion and a corresponding side of the housing without a handle are both formed outwardly with an extension strip symmetrically arranged with each other, and the two extension strips are fixed to each other; The driving mechanism includes an active part arranged between the shell with a handle and the shell without a handle, and two traction ropes arranged between the two extension bars and distributed up and down; the corrector includes a toggle block rotatably connected between the ends of the two extension bars for insertion into the bone joint; one end of the two traction ropes is connected to the rotating side of the toggle block, and the other end of the two traction ropes is connected to the active part.

2. The intertrochanteric fracture reduction device according to claim 1, characterized in that: The corrector also includes a pin shaft vertically and rotatably connected between the ends of the two extension bars, the toggle block is vertically fixed on one side outer wall of the pin shaft, and one end of the two traction ropes are both wound around the pin shaft and the winding directions are opposite to each other.

3. The intertrochanteric fracture reduction device according to claim 1, characterized in that: The active part includes a first rotating shaft and a second rotating shaft that are laterally and rotatably connected between the handle shell and the inside of the non-handle shell and are parallel to each other, a first gear and a second gear that are concentrically fixed on the first rotating shaft and the second rotating shaft and mesh with each other, and a first hand wheel and a second hand wheel that are concentrically fixed at one end of the first rotating shaft and the second rotating shaft and are both located outside the handle shell or the non-handle shell. The other ends of the two traction ropes are respectively wound around the first rotating shaft and the second rotating shaft and the winding direction is the same.

4. The intertrochanteric fracture reduction device according to claim 3, characterized in that: The handle housing or the handleless housing is also provided with a locking unit that cooperates with the first rotating shaft or the second rotating shaft. The locking unit includes a third gear concentrically fixed on the first rotating shaft or the second rotating shaft, two locking arms that are rotatably elastically connected to the handle housing or the handleless housing and symmetrically arranged on one side of the outer periphery of the third gear, a traction shaft that is laterally and rotatably inserted and connected in the handle housing or the handleless housing, a cam fixed on the traction shaft and located between the two locking arms, and a switching block fixed at one end of the traction shaft and located outside the handle housing or the handleless housing. The swinging ends of the two locking arms always have a tendency to rotate toward the third gear; a positioning tooth that cooperates with the tooth groove of the third gear is formed on the swinging end of the locking arm facing the third gear.

5. The intertrochanteric fracture reduction device according to claim 4, characterized in that: The locking unit also includes a locator that cooperates with the cam. The locator includes a steel ball that is movably arranged under the cam to have the function of elastically moving up and down. Correspondingly, two notch grooves that cooperate with the steel ball are provided on the outer wall of the large head end of the cam.

6. The intertrochanteric fracture reduction device according to claim 1, characterized in that: An adjustment unit is also provided between the operating handle and the corrector, and the adjustment unit includes an adjustment shaft that is laterally and rotatably connected between the two extension bars, a third handwheel concentrically fixed on the adjustment shaft at one end away from the corrector, an extension plate movably arranged inside the toggle block to have the function of translating back and forth along the length direction of the toggle block, a first rocker arm rotatably connected to a side of the extension plate close to the adjustment shaft, and a second rocker arm rotatably connected to an end of the adjustment shaft close to the toggle block, the end of the second rocker arm is rotatably connected to the end of the first rocker arm, the root rotation centerline of the first rocker arm and the end rotation centerline of the second rocker arm are parallel to each other, and the root rotation centerline of the second rocker arm cooperates with the rotation centerline of the pin shaft.

7. The intertrochanteric fracture reduction device according to claim 6, characterized in that: It also includes a telescopic rod, a flat groove is provided inside the toggle block, the extension plate is movably arranged in the flat groove, a positioning groove is provided on the outer wall of the pin shaft facing the adjusting shaft, the end of the adjusting shaft close to the toggle block extends into the positioning groove, and a cavity hole is provided on the bottom surface of the positioning groove which is interconnected with the inside of the flat groove, and the second rocker arm is inserted into the cavity hole.

8. The intertrochanteric fracture reduction device according to claim 6, characterized in that: A groove hole symmetrically distributed with respect to each other is provided on the outer wall of the root of the two extension strips, and the third hand wheel is movably inserted in the two groove holes.

9. The intertrochanteric fracture reduction device according to claim 5, characterized in that: A sleeve is also fixed inside the shell with a handle or the shell without a handle, and the locator is arranged in the sleeve. The locator also includes a base movably arranged inside the sleeve and a first spring fixed at the bottom of the base and located inside the sleeve. The end of the first spring is pressed tightly against the bottom of the sleeve, and the steel ball is fixed at the top of the base.

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