CN111658034A - Distractor in knee joint replacement - Google Patents
Distractor in knee joint replacement Download PDFInfo
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- CN111658034A CN111658034A CN202010670217.9A CN202010670217A CN111658034A CN 111658034 A CN111658034 A CN 111658034A CN 202010670217 A CN202010670217 A CN 202010670217A CN 111658034 A CN111658034 A CN 111658034A
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- transmission
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- transmission shaft
- drive
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0268—Joint distractors for the knee
Abstract
The invention relates to the technical field of distractors in knee joint replacement, in particular to a distractor in knee joint replacement, which comprises a distraction structure, a transmission structure, a telescopic structure, a supporting structure, a driving structure and a limiting structure, wherein the distraction structure comprises a first supporting part and a second supporting part; the bottom end of the driving structure for manual driving is provided with a supporting structure, a transmission structure in rotary connection is arranged in the supporting structure, and the transmission structure is connected with the driving structure; two ends of the transmission structure are connected with a telescopic structure for adjusting the spreading distance, and the telescopic structure is connected with the support structure; the back of the body end that backs of two extending structure is equipped with the structure that struts that is used for strutting, extending structure cooperation bearing structure's use has improved space utilization efficiency, is convenient for through drive structure drive transmission structure, makes two extending structure of drive structure drive adjust two distances that strut between the structure, and then is convenient for adjust the distance that struts of thighbone, and then has improved the operation flexibility greatly, and the medical personnel of being convenient for operate, make simultaneously between the structure more stable.
Description
Technical Field
The invention relates to the technical field of distractors in knee joint replacement, in particular to a distractor in knee joint replacement.
Background
Artificial total knee replacement has become one of the surgical treatment modes for diseases such as late degenerative osteoarthritis, rheumatoid arthritis, ankylosing spondylitis and the like; since the postoperative prolonged braking time and muscle exercise cannot correct the imbalance of soft tissue, the soft tissue balance is completely dependent on the operation itself; therefore, soft tissue balancing in artificial total knee arthroplasty is a critical step; the medial-lateral balance of the knee joint in the artificial total knee replacement is mainly evaluated by the experience of a doctor with two hands, and a proper and effective auxiliary tool is an important guarantee of the operation, meanwhile, in the preoperative preparation stage, X-ray irradiation is generally carried out to determine the situation and the position of problems in the knee joint, but the supporting separation distance of the femoral side and the tibial side is difficult to accurately determine and position in the operation process, for example: patent application No. 201510537181.6 discloses a distractor for total knee arthroplasty, comprising: a support plate disposed longitudinally; a tibial side member vertically connected to the support plate; the femoral side component is vertically connected with the supporting plate, a first longitudinal sliding groove is formed in the inner side surface of the supporting plate, and the femoral side component is provided with a first convex part which is embedded in the first sliding groove; a motor shaft of the first linear motor is connected with a first pushing block, and the upper end of the first pushing block is provided with a hinged part; one end of the first movable rod is hinged with the hinged part of the first pushing block, and the other end of the first movable rod is hinged with the first connecting block arranged on the inner side surface of the femoral side component; the control box is electrically connected with the first linear motor, is used for controlling the movement of the first linear motor, and is provided with a power supply for providing a power source and a wireless component for providing information transmission; its technical scheme can be with the steady strutting of thighbone side and shin bone side, can rotate thighbone side member, has improved the precision of total knee joint replacement art.
However, in the patent with application No. 201510537181.6, the thighbone side parts slide towards between the backup pad, and the occupation space of backup pad is great, causes near tissue damage easily, has influenced medical personnel's operation simultaneously, and the stability of transmission between thighbone side parts and the backup pad is relatively poor, and is big to the dependence of electric energy, and the dynamics of strutting to the thighbone is not convenient for control.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a spreader in knee joint replacement.
The technical scheme adopted by the invention for solving the technical problems is as follows: a spreader in knee joint replacement comprises a spreading structure, a transmission structure, a telescopic structure, a supporting structure, a driving structure and a limiting structure; the bottom end of the driving structure for manual driving is provided with the supporting structure, the supporting structure is internally provided with the transmission structure which is rotatably connected, and the transmission structure is connected to the driving structure; the two ends of the transmission structure are connected with the telescopic structure for adjusting the spreading distance, and the telescopic structure is connected with the supporting structure; the opposite ends of the two telescopic structures are provided with the strutting structures for strutting, and the strutting structures are communicated with the telescopic structures; the supporting structure is provided with a limiting structure used for limiting the transmission structure, and the telescopic structure is communicated with the limiting structure.
Specifically, bearing structure includes carriage, fixed frame and bracing piece, drive structure locates the top of bracing piece, the bottom of bracing piece is equipped with fixed frame, fixed frame is fixed in the carriage.
Specifically, the drive structure includes fixed plate, through-hole, hand wheel, drive shaft, rack and first gear, the fixed plate vertical fixation in the bracing piece, be equipped with on the fixed plate the through-hole, the lateral wall of fixed plate is equipped with rotates the connection the drive shaft, the drive shaft with it is perpendicular between the bracing piece, the hand wheel is fixed in the drive shaft, the drive shaft with threaded connection between the rack, the rack with sliding connection between the fixed plate, the rack with first gear engagement.
It is specific, the transmission structure includes transfer line, runner and transmission shaft, the top of transmission shaft run through in the bracing piece with the fixed plate, the transmission shaft with rotate between the bracing piece and connect, the transmission shaft with rotate between the fixed plate and connect, first gear is fixed in the top of transmission shaft, the bottom of transmission shaft run through in fixed frame, the transmission shaft with rotate between the fixed frame and connect, the bottom of transmission shaft is equipped with the runner, be equipped with two rotations on the runner and connect the transfer line.
Specifically, extending structure includes sliding sleeve, slider and trachea, the both ends symmetry of carriage is equipped with two the sliding sleeve, inside cavity the slider with sliding connection between the sliding sleeve, two the slip opposite direction of slider, the slider with rotate between the transfer line and be connected, two the slider deviates from the one end vertical fixation of transfer line struts the structure, tracheal one end is fixed in the slider.
Specifically, the structure of strutting includes backup pad, recess, slide bar, reset spring and backplate, the slide bar with sliding connection between the slider, the slide bar with be equipped with between the slider reset spring, the trachea with the slide bar with accommodation cavity between the slider switches on, the tip of slide bar is equipped with the backplate, the backplate with sliding connection between the backup pad, the backup pad is fixed in the slider deviates from the one end of transfer line, be equipped with on the backplate the recess.
It is specific, limit structure includes piston, second gear, position sleeve and rand, the inside of fixed frame is equipped with sliding connection, loop configuration the piston, tracheal other one end with the piston with hold the cavity between the fixed frame and switch on, the piston with rotate between the second gear and be connected, the second gear with sliding connection between the position sleeve, the position sleeve is the cylinder of non-cylinder structure, the position sleeve cup joint in the transmission shaft, be equipped with on the fixed frame the rand, the rand can with the second gear joint.
The invention has the beneficial effects that:
(1) the invention relates to a spreader used in knee joint replacement, wherein a supporting structure is arranged at the bottom end of a driving structure used for manual driving, a transmission structure in rotary connection is arranged in the supporting structure, and the transmission structure is connected with the driving structure; two ends of the transmission structure are connected with a telescopic structure for adjusting the spreading distance, and the telescopic structure is connected with the support structure; the back of the body end that backs of two extending structure is equipped with the structure that struts that is used for strutting, extending structure cooperation bearing structure's use has improved space utilization efficiency, is convenient for through drive structure drive transmission structure, makes two extending structure of drive structure drive adjust two distances that strut between the structure, and then is convenient for adjust the distance that struts of thighbone, and then has improved the operation flexibility greatly, and the medical personnel of being convenient for operate, make simultaneously between the structure more stable, promptly: firstly, medical staff fingers penetrate through the through holes to hold the fixing plate, the through holes are convenient to take the fixing plate, the taking of the spreader is more convenient and faster, then the two supporting plates are arranged between thighbones of patients, the protective plate is abutted against the thighbones of the patients, then the fixing plate is held by hands, the hand wheel is rotated to drive the driving shaft to rotate, the driving shaft is rotatably connected with the fixing plate, the driving shaft drives the rack to slide between the fixing plate and the driving shaft thread, the rack drives the first gear to rotate, the first gear rotates to drive the transmission shaft and the supporting rod to rotate, the transmission shaft drives the rotating wheel to rotate, the rotating shaft drives the transmission rod to rotate, the two ends of the transmission rod are rotatably connected with the rotating wheel and the sliding block, the principle of a crank connecting rod is adopted, the transmission rod rotates and simultaneously drives the sliding block to slide with the sliding sleeve, and then be convenient for treat different patients, reduced the requirement to the electric energy, improved operating efficiency and quality greatly, extending structure and drive structure all are equipped with between two backup pads simultaneously, and then improved space utilization efficiency greatly, make medical personnel's operation nimble more convenient.
(2) According to the distracter in the knee joint replacement, the opposite ends of the two telescopic structures are provided with the distraction structures for distraction, the arrangement of the distraction structures is convenient for relieving the pressure of the thighbone of a patient, the thighbone of the patient is effectively prevented from being damaged due to overlarge distraction force, and the distraction quality is further greatly improved, namely: recess on the backplate accords with patient's thighbone structure, the atress effect of the thighbone that makes the patient is better, when the transfer line promotes the slider and makes backplate and patient's thighbone laminating, when continuing to rotate the transmission shaft, when making between two sliders apart from crescent, when patient's thighbone bears great pressure, sliding connection between backplate and the backup pad, the compression of slide bar conflict reset spring on the backplate, and then slide between through backplate and the backup pad and reduce the biggest support distance between two backplates, make reset spring carry out the pressure release to the slide bar simultaneously, and then improved the supporting effect to patient's thighbone, effectively prevent to the thighbone too big thighbone damage that causes the patient of pressure to the thighbone.
(3) According to the distracter in the knee joint replacement, the distraction structure is communicated with the telescopic structure; be equipped with on bearing structure and be used for carrying out spacing limit structure to transmission structure, and extending structure switches on in limit structure, and then be convenient for drive limit structure when the pressure of strutting the structure is too big, it is spacing to make limit structure carry out transmission structure, it opens and causes patient's thighbone to decrease to continue driving two when effectual preventing has great pressure to patient's thighbone, and then improved the security of strutting greatly, be convenient for adjust the dynamics of strutting patient's thighbone, and then make the effect of strutting better, promptly: when the protective plate and the supporting plate slide, the protective plate drives the sliding rod and the sliding block to slide, the reset spring is compressed, an accommodating cavity between the sliding rod and the sliding block on the protective plate is gradually reduced, so that gas between the sliding rod and the sliding block enters between the piston and the fixed frame through the air pipe, the piston is driven to slide between the piston and the fixed frame under the action of atmospheric pressure, the piston is abutted against the second gear and slides with the positioning sleeve, the second gear can be gradually contacted with the clamping ring, when the pressure of the protective plate is overlarge, the gas between the sliding rod and the sliding block further enters the bottom end of the piston, so that the piston drives the second gear to be clamped with the clamping ring, an operator can not continuously drive the driving shaft to rotate, the two protective plates are effectively prevented from being continuously driven to be opened to cause the femoral bone damage of a patient when large pressure is applied to the femoral bone of the patient, thereby ensuring better opening effect.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural diagram illustrating the overall structure of a preferred embodiment of a distractor for knee replacement according to the present invention;
FIG. 2 is an enlarged view of the part A shown in FIG. 1;
FIG. 3 is a schematic view of a connection structure between the distracting structure and the telescopic structure shown in FIG. 1;
FIG. 4 is a schematic structural view of the support structure shown in FIG. 2;
FIG. 5 is an enlarged view of the structure of the portion B shown in FIG. 4;
FIG. 6 is an enlarged view of the structure of the portion C shown in FIG. 1;
fig. 7 is a schematic structural diagram of the driving structure shown in fig. 6.
In the figure: 1. the device comprises a spreading structure, 11, a support plate, 12, a groove, 13, a sliding rod, 14, a return spring, 15, a protective plate, 2, a transmission structure, 21, a transmission rod, 22, a rotating wheel, 23, a transmission shaft, 3, a telescopic structure, 31, a sliding sleeve, 32, a sliding block, 33, an air pipe, 4, a support structure, 41, a support frame, 42, a fixed frame, 43, a support rod, 5, a driving structure, 51, a fixed plate, 52, a through hole, 53, a hand wheel, 54, a driving shaft, 55, a rack, 56, a first gear, 6, a limiting structure, 61, a piston, 62, a second gear, 63, a positioning sleeve, 64 and a clamping ring.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1-7, the distractor for knee joint replacement according to the present invention comprises a distraction structure 1, a transmission structure 2, a telescopic structure 3, a support structure 4, a driving structure 5 and a limit structure 6; the bottom end of the driving structure 5 for manual driving is provided with the supporting structure 4, the supporting structure 4 is internally provided with the transmission structure 2 which is rotatably connected, and the transmission structure 2 is connected to the driving structure 5; two ends of the transmission structure 2 are connected with the telescopic structure 3 for adjusting the expanding distance, and the telescopic structure 3 is connected with the support structure 4; the opposite ends of the two telescopic structures 3 are provided with the strutting structures 1 for strutting, and the strutting structures 1 are communicated with the telescopic structures 3; the supporting structure 4 is provided with a limiting structure 6 for limiting the transmission structure 2, and the telescopic structure 3 is communicated with the limiting structure 6.
Specifically, bearing structure 4 includes carriage 41, fixed frame 42 and bracing piece 43, drive structure 5 is located the top of bracing piece 43, the bottom of bracing piece 43 is equipped with fixed frame 42, fixed frame 42 is fixed in carriage 41.
Specifically, the driving structure 5 includes a fixing plate 51, a through hole 52, a hand wheel 53, a driving shaft 54, a rack 55 and a first gear 56, wherein the fixing plate 51 is vertically fixed to the supporting rod 43, the fixing plate 51 is provided with the through hole 52, the side wall of the fixing plate 51 is provided with the driving shaft 54 which is rotatably connected, the driving shaft 54 is vertical to the supporting rod 43, the hand wheel 53 is fixed to the driving shaft 54, the driving shaft 54 is in threaded connection with the rack 55, the rack 55 is in sliding connection with the fixing plate 51, and the rack 55 is engaged with the first gear 56.
Specific, drive structure 2 includes transfer line 21, runner 22 and transmission shaft 23, the top of transmission shaft 23 run through in bracing piece 43 with fixed plate 51, transmission shaft 23 with rotate between the bracing piece 43 and be connected, transmission shaft 23 with rotate between the fixed plate 51 and be connected, first gear 56 is fixed in the top of transmission shaft 23, the bottom of transmission shaft 23 run through in fixed frame 42, transmission shaft 23 with rotate between the fixed frame 42 and connect, the bottom of transmission shaft 23 is equipped with runner 22, be equipped with two on the runner 22 and rotate the connection transfer line 21.
Specifically, the telescopic structure 3 includes sliding sleeves 31, sliding blocks 32 and air pipes 33, two ends of the supporting frame 41 are symmetrically provided with two sliding sleeves 31, the sliding blocks 32 which are hollow inside are slidably connected with the sliding sleeves 31, the sliding directions of the two sliding blocks 32 are opposite, the sliding blocks 32 are rotatably connected with the transmission rod 21, one ends of the two sliding blocks 32 departing from the transmission rod 21 are vertically fixed on the spreading structure 1, and one end of the air pipe 33 is fixed on the sliding blocks 32; the bottom end of the driving structure 5 for manual driving is provided with the supporting structure 4, the supporting structure 4 is internally provided with the transmission structure 2 which is rotatably connected, and the transmission structure 2 is connected to the driving structure 5; two ends of the transmission structure 2 are connected with the telescopic structure 3 for adjusting the expanding distance, and the telescopic structure 3 is connected with the support structure 4; two extending structure 3's the end of carrying on the back is equipped with and is used for strutting structure 1, extending structure 3 cooperates bearing structure 4's use has improved space utilization efficiency, is convenient for pass through drive structure 5 drive structure 2 makes drive structure 2 drives two extending structure 3 adjusts two strutting the distance between the structure 1, and then be convenient for adjust the femoral distance of strutting, and then improved the flexibility of operation greatly, the medical personnel's operation of being convenient for makes simultaneously between the structure more stable, promptly: firstly, the medical staff passes through the through hole 52 to hold the fixing plate 51 by hand, the through hole 52 is provided to facilitate taking the fixing plate 51, so that the taking of the distractor is more convenient and faster, then the two supporting plates 11 are arranged between the thighbones of the patient, so that the protecting plate 15 is abutted against the thighbones of the patient, then the fixing plate 51 is held by hand, the hand wheel 53 is rotated, the hand wheel 53 drives the driving shaft 54 to rotate, the driving shaft 54 is rotatably connected with the fixing plate 51, the driving shaft 54 drives the rack 55 to slide with the fixing plate 51 through threads, the rack 55 drives the first gear 56 to rotate, the first gear 56 rotates to drive the transmission shaft 23 to rotate with the supporting rod 43, so that the transmission shaft 23 drives the rotating wheel 22 to rotate, the rotating shaft 22 drives the transmission rod 21 to rotate, and two ends of the transmission rod 21 are rotatably connected with the rotating wheel 22 and the sliding block 32, adopted the principle of crank connecting rod, made drive when transfer line 21 pivoted slider 32 with slide between the sliding sleeve 31, make two slider 32's slip opposite direction, and then quick pass through slider 32 with sliding adjustment is two between the sliding sleeve 31 distance between the backup pad 11, and then be convenient for treat the patient of difference, reduced the requirement to the electric energy, improved operating efficiency and quality greatly, simultaneously extending structure 3 with drive structure 2 all is equipped with two between the backup pad 11, and then improved space utilization efficiency greatly, make medical personnel's operation nimble more convenient.
Specifically, the distraction structure 1 comprises a support plate 11, a groove 12, a slide rod 13, a return spring 14 and a guard plate 15, the slide rod 13 is connected with the slide block 32 in a sliding manner, the return spring 14 is arranged between the slide rod 13 and the slide block 32, the air pipe 33 is communicated with an accommodating cavity between the slide rod 13 and the slide block 32, the guard plate 15 is arranged at the end part of the slide rod 13, the guard plate 15 is connected with the support plate 11 in a sliding manner, the support plate 11 is fixed at one end of the slide block 32, which is far away from the transmission rod 21, and the groove 12 is arranged on the guard plate 15; two the end of carrying on the back of the body of extending structure 3 is equipped with and is used for strutting structure 1, strutting structure 1's setting is convenient for carry out the pressure release to patient's thighbone, and the effectual dynamics that prevents to strut causes patient's thighbone damage too greatly, and then has improved the quality of strutting greatly, promptly: on the backplate 15 recess 12 accords with patient's thighbone structure, makes patient's thighbone atress effect better, transfer line 21 promotes slider 32 makes when backplate 15 and patient's thighbone laminating, when continuing to rotate transmission shaft 23 makes two when the distance between the slider 32 increases gradually, when patient's thighbone bears great pressure, backplate 15 with sliding connection between the backup pad 11, on the backplate 15 slide bar 13 is contradicted reset spring 14 compresses, and then passes through backplate 15 with slide between the backup pad 11 and reduce two the biggest support distance between the backplate 15 makes simultaneously reset spring 14 is right slide bar 13 carries out the pressure release, and then has improved the supporting effect to patient's thighbone, effectively prevents to the too big thighbone damage that causes patient's thighbone to the pressure of thighbone.
Specifically, the limiting structure 6 includes a piston 61, a second gear 62, a positioning sleeve 63 and a collar 64, the piston 61 is slidably connected and has an annular structure inside the fixing frame 42, the other end of the air tube 33 is communicated with an accommodating cavity between the piston 61 and the fixing frame 42, the piston 61 is rotatably connected with the second gear 62, the second gear 62 is slidably connected with the positioning sleeve 63, the positioning sleeve 63 is a cylinder of a non-cylindrical structure, the positioning sleeve 63 is sleeved on the transmission shaft 23, the collar 64 is arranged on the fixing frame 42, and the collar 64 can be engaged with the second gear 62; the opening structure 1 is communicated with the telescopic structure 3; be equipped with on bearing structure 4 and be used for right drive structure 2 carries on spacingly limit structure 6, just extending structure 3 switch on in limit structure 6, and then be convenient for work as drive when strutting structure 1's pressure is too big limit structure 6 makes limit structure 6 is right drive structure 2 carries on spacingly, and the effectual thighbone that prevents to the patient continues to drive two when having great pressure strutting structure 1 opens and causes patient's thighbone to decrease, and then has improved the security that struts greatly, is convenient for adjust the dynamics of strutting to patient's thighbone, and then makes the effect of strutting better, promptly: when the guard plate 15 slides with the support plate 11, the guard plate 15 drives the sliding rod 13 and the sliding block 32 to slide, the return spring 14 is compressed, the accommodating cavity between the sliding rod 13 and the sliding block 32 on the guard plate 15 is gradually reduced, so that the gas between the sliding rod 13 and the sliding block 32 enters between the piston 61 and the fixed frame 42 through the gas pipe 33, the piston 61 and the fixed frame 42 are driven to slide under the action of atmospheric pressure, the piston 61 pushes against the second gear 62 and the positioning sleeve 63 to slide, the second gear 62 can be gradually contacted with the collar 64, when the pressure of the guard plate 15 is too large, the gas between the sliding rod 13 and the sliding block 32 further enters the bottom end of the piston 61, and the piston 61 drives the second gear 62 to be clamped with the collar 64, and then make the operator can not continue the drive shaft 54 rotates, and the effectual drive that continues when preventing to have great pressure to patient's thighbone is two backplate 15 opens and causes patient's thighbone to decrease, and then has improved the security that struts greatly, is convenient for adjust the dynamics of strutting to patient's thighbone, and then makes and strut the effect better.
When the invention is used, firstly, fingers of medical staff penetrate through the through holes 52 to hold the fixing plate 51, the through holes 52 are arranged to facilitate the taking of the fixing plate 51, so that the taking of the spreader is more convenient and faster, then the two support plates 11 are arranged between the thighbones of the patient, so that the guard plate 15 is abutted against the thighbones of the patient, then the fixing plate 51 is held by hand, the hand wheel 53 is rotated, the hand wheel 53 drives the driving shaft 54 to rotate, the driving shaft 54 is rotatably connected with the fixing plate 51, the driving shaft 54 drives the rack 55 to slide between the fixing plate 51 and the threads, the rack 55 drives the first gear 56 to rotate, the first gear 56 rotates to drive the transmission shaft 23 to rotate between the support rod 43, so that the transmission shaft 23 drives the rotating wheel 22 to rotate, the rotating shaft 22 drives the transmission rod 21 to rotate, the two ends of the transmission rod 21 are rotatably connected with the rotating wheel, the sliding directions of the two sliding blocks 32 are opposite, so that the distance between the two supporting plates 11 is rapidly adjusted through the sliding between the sliding blocks 32 and the sliding sleeve 31, different patients can be conveniently treated, the requirement on electric energy is reduced, the operation efficiency and the quality are greatly improved, meanwhile, the telescopic structure 3 and the transmission structure 2 are arranged between the two supporting plates 11, the space utilization efficiency is greatly improved, and the operation of medical staff is more flexible and convenient; the groove 12 on the guard plate 15 conforms to the femur structure of a patient, so that the stress effect of the femur of the patient is better, when the transmission rod 21 pushes the slide blocks 32 to enable the guard plate 15 to be attached to the femur of the patient, when the transmission shaft 23 continues to rotate, the distance between the two slide blocks 32 is gradually increased, when the femur of the patient bears larger pressure, the guard plate 15 is in sliding connection with the support plate 11, the slide rod 13 on the guard plate 15 is pressed against the reset spring 14 to be compressed, the maximum supporting distance between the two guard plates 15 is further reduced through the sliding between the guard plate 15 and the support plate 11, and meanwhile, the reset spring 14 is used for relieving the pressure of the slide rod 13, so that the supporting effect of the femur of the patient is improved, and the femur; when the protective plate 15 slides with the supporting plate 11, the protective plate 15 drives the sliding rod 13 and the sliding block 32 to slide, the return spring 14 is compressed, the accommodating cavity between the sliding rod 13 and the sliding block 32 on the protective plate 15 is gradually reduced, so that the air between the sliding rod 13 and the sliding block 32 enters between the piston 61 and the fixed frame 42 through the air pipe 33, the piston 61 and the fixed frame 42 are driven to slide under the action of atmospheric pressure, the piston 61 is enabled to abut against the second gear 62 and the positioning sleeve 63 to slide, the second gear 62 can be gradually contacted with the retainer ring 64, when the pressure of the protective plate 15 is overlarge, the air between the sliding rod 13 and the sliding block 32 further enters the bottom end of the piston 61, the piston 61 drives the second gear 62 to be clamped with the retainer ring 64, and further an operator can not drive the driving shaft 54 to rotate continuously, thereby effectively preventing the two protective plates 15 from being continuously driven to be opened to damage, and then improved the security of strutting greatly, be convenient for adjust the dynamics of strutting to patient's thighbone, and then make the effect of strutting better.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A spreader in knee joint replacement is characterized by comprising a spreading structure (1), a transmission structure (2), a telescopic structure (3), a support structure (4), a driving structure (5) and a limiting structure (6); the bottom end of the driving structure (5) used for manual driving is provided with the supporting structure (4), the supporting structure (4) is internally provided with the transmission structure (2) in rotary connection, and the transmission structure (2) is connected to the driving structure (5); the two ends of the transmission structure (2) are connected with the telescopic structure (3) for adjusting the spreading distance, and the telescopic structure (3) is connected with the support structure (4); the opposite ends of the two telescopic structures (3) are provided with the stretching structures (1) for stretching, and the stretching structures (1) are communicated with the telescopic structures (3); the supporting structure (4) is provided with a limiting structure (6) used for limiting the transmission structure (2), and the telescopic structure (3) is communicated with the limiting structure (6).
2. The distractor of claim 1, wherein: bearing structure (4) include carriage (41), fixed frame (42) and bracing piece (43), drive structure (5) are located the top of bracing piece (43), the bottom of bracing piece (43) is equipped with fixed frame (42), fixed frame (42) are fixed in carriage (41).
3. The distractor of claim 2, wherein: drive structure (5) are including fixed plate (51), through-hole (52), hand wheel (53), drive shaft (54), rack (55) and first gear (56), fixed plate (51) vertical fixation in bracing piece (43), be equipped with on fixed plate (51) through-hole (52), the lateral wall of fixed plate (51) is equipped with the rotation and connects drive shaft (54), drive shaft (54) with perpendicular between bracing piece (43), hand wheel (53) are fixed in drive shaft (54), drive shaft (54) with threaded connection between rack (55), rack (55) with sliding connection between fixed plate (51), rack (55) with first gear (56) meshing.
4. The distractor of claim 3, wherein: drive structure (2) are including transfer line (21), runner (22) and transmission shaft (23), the top of transmission shaft (23) run through in bracing piece (43) with fixed plate (51), transmission shaft (23) with rotate between bracing piece (43) and connect, transmission shaft (23) with rotate between fixed plate (51) and connect, first gear (56) are fixed in the top of transmission shaft (23), the bottom of transmission shaft (23) run through in fixed frame (42), transmission shaft (23) with rotate between fixed frame (42) and connect, the bottom of transmission shaft (23) is equipped with runner (22), be equipped with two on runner (22) and rotate and connect transfer line (21).
5. The distractor of claim 4, wherein: extending structure (3) are including sliding sleeve (31), slider (32) and trachea (33), the both ends symmetry of carriage (41) is equipped with two sliding sleeve (31), inside cavity slider (32) with sliding connection between sliding sleeve (31), two the slip opposite direction of slider (32), slider (32) with rotate between transfer line (21) and connect, two slider (32) deviate from the one end vertical fixation of transfer line (21) prop open structure (1), the one end of trachea (33) is fixed in slider (32).
6. The distractor of claim 5, wherein: prop open structure (1) and include backup pad (11), recess (12), slide bar (13), reset spring (14) and backplate (15), slide bar (13) with sliding connection between slider (32), slide bar (13) with be equipped with between slider (32) reset spring (14), trachea (33) with slide bar (13) with holding cavity between slider (32) switches on, the tip of slide bar (13) is equipped with backplate (15), backplate (15) with sliding connection between backup pad (11), backup pad (11) are fixed in slider (32) deviate from the one end of transfer line (21), be equipped with on backplate (15) recess (12).
7. The distractor of claim 6, wherein: limit structure (6) include piston (61), second gear (62), position sleeve (63) and rand (64), the inside of fixed frame (42) is equipped with sliding connection, loop configuration piston (61), trachea (33) other one end with piston (61) with holding cavity between the fixed frame (42) switches on, piston (61) with rotate between second gear (62) and connect, second gear (62) with sliding connection between position sleeve (63), position sleeve (63) are the cylinder of non-cylinder structure, position sleeve (63) cup joint in transmission shaft (23), be equipped with on fixed frame (42) rand (64), rand (64) can with second gear (62) block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670217.9A CN111658034B (en) | 2020-07-13 | 2020-07-13 | Distractor in knee joint replacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010670217.9A CN111658034B (en) | 2020-07-13 | 2020-07-13 | Distractor in knee joint replacement |
Publications (2)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112451007A (en) * | 2020-11-26 | 2021-03-09 | 西安市红会医院 | Support maintaining device for minimally invasive spine surgery |
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