Bone traction device

Abstract

This invention discloses a bone traction device, relating to the field of medical device technology. It includes a base, a support component for supporting a patient's limb, and a traction component for traction of the limb. The traction component includes a traction frame mounted on the base and a traction rope connecting the traction frame and the limb respectively. The traction rope is equipped with an adjustment component for adjusting its length. The traction frame includes a lifting rod hinged to the base and a traction rod connected to the lifting rod via a locking mechanism. The locking mechanism includes a gear I located at the side end of the lifting rod, a gear II located at the side end of the traction rod and matching the gear I, and a control component for controlling whether gear I and gear II mesh. Gear I and gear II include several racks arranged in a uniform circular pattern, with the racks installed in the same radial direction as the circle. This invention has a simple structure, is easy to operate, highly efficient and practical, and provides good therapeutic and rehabilitation effects. It also features the ability to adjust the direction, angle, and magnitude of the therapeutic traction force.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a bone traction device. Background Art

[0002] The existing Brownian bone traction frame is composed of a main stainless steel or metal iron support frame, a gauze bandage or cloth belt, a bedside fixing device, a pulley, a traction bow, a traction rope, a weight hook, a weight, etc. It is a necessary therapeutic device clinically used for the reduction of fractures and dislocations, maintaining good alignment and stability after reduction, preventing and correcting joint deformities, relieving muscle spasms and pain, and preoperative traction treatment of fractures or the final treatment of certain fracture types.

[0003] The main structure of the Brownian bone traction frame is welded from iron or stainless steel. This structure has the advantage of a strong structure, but lacks scalability in length and has a fixed angle. Therefore, it is difficult to meet the needs of patients of different heights during clinical bone traction treatment. Secondly, during bone traction treatment, the lower limbs are in a static state for a long time, and the traditional horizontal support plane is a horizontal support pad made of metal rods wrapped around bandages on both sides. Long-term bone traction is likely to cause blood circulation disorders in the soft tissues of the compressed parts, and even serious complications such as infection and necrosis. In addition, pus, blood, infection or dirt from the traumatic lower limbs are likely to contaminate the bandage plane on the traction frame, which is easy to form cross-linking when used in the ward. fork infection; in addition, the bedside fixing device of this device must be fixed on an appropriate bedside and wrapped tightly with a bandage before use. According to clinical treatment observations, when the lower limbs need traction treatment in the abduction position, the pulley structure in the middle of the bedside fixing device cannot be tilted and fixed left and right; finally, because the traction force of this device is to place the weight on the weight hook, and the traction rope crosses the pulley to act on the traction bow, thereby playing a role of continuous traction, but clinical observations have found that during the traction process of the patient, the body often shifts to the side of the bedside, so that the traction rope and the weight hook shift accordingly. Clinically, it is often found that the weight slips to the ground and produces invalid traction, resulting in failure of traction treatment.

[0004] The patent document "A Bone Traction Force Device" (CN106859829A) discloses a bone traction force device, including a traction component, an elastic component, and a force sensor, wherein the elastic component or the force sensor is connected to the traction component; an adjustment component for adjusting the telescopic length of the elastic component; a traction signal transceiver module, a control module, and a power supply. The control module outputs a control signal based on the comparison result between the feedback signal of the actual value of the traction force and the input signal of the set value of the traction force received by the traction signal transceiver module, and controls the adjustment component to adjust the telescopic length of the elastic component so that the actual value of the traction force detected by the force sensor after the length change is equal to the set value; at the same time, the control module outputs a control signal based on the input signal, and controls the adjustment component to maintain the action time period of the elastic component. The bone traction force device can realize self-setting of a single or combined bone traction force and action time period as needed, and can realize continuous adjustment of the bone traction force, with high adjustment accuracy, simple structure, and convenient operation. However, the structure of the device is relatively complex, the traction direction of the traction rope cannot be adjusted, and the patient's rehabilitation treatment is poor. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention proposes a bone traction device which is easy to operate, efficient and practical, and has good therapeutic and rehabilitation effects, and has the characteristics of adjusting the direction, angle and size of the therapeutic traction force.

[0006] The present invention comprises a base, a supporting component for supporting a patient's limbs and a traction component for traction of the limbs, wherein the traction component comprises a traction frame mounted on the base and a traction rope respectively connecting the traction frame and the limbs, and the traction rope is provided with an adjustment component for adjusting the length of the traction rope;

[0007] The traction frame comprises a lifting rod hinged on the base and a traction rod connected to the lifting rod through a locking mechanism;

[0008] The locking mechanism includes a gear I fixed to the side end of the lifting rod, a gear II fixed to the side end of the traction rod and matching with the gear I, and a control member for controlling whether the gear I and the gear II are meshed. The gear I and the gear II both include a plurality of racks evenly arranged in a circle, and the installation direction of the racks is consistent with the radial direction of the circle.

[0009] Furthermore, the supporting component includes a telescopic rod I and a telescopic rod II installed on the base, the telescopic rod I and the telescopic rod II are connected by a telescopic rod III, the installation direction of the telescopic rod III is consistent with the placement direction of the limb, the telescopic rods III are connected by a connecting rod, an air cushion is installed on the telescopic rod III, and the supporting component also includes an air cushion for placing the limb.

[0010] Furthermore, the telescopic rod II is hinged on the slider, and the base is provided with a slide rail matching the slider.

[0011] Furthermore, the telescopic rod I, telescopic rod II, telescopic rod III and lifting rod are all provided with adjusting parts that can adjust their extension or shortening.

[0012] Furthermore, the adjusting member includes a reduction motor or a cylinder.

[0013] Furthermore, the adjustment assembly includes a torsion barrel and screw rods respectively arranged at two ends of the torsion barrel and connected by threads.

[0014] Furthermore, the lifting rod is provided with an adjustment seat outside for adjusting the rotation direction and angle of the lifting rod, and the adjustment seat includes a mounting hole for inserting the lifting rod and a fixing plate for mounting the adjustment seat on the base, and a fastening hole is provided on the side of the mounting hole, and a fastener for fastening the position of the lifting rod is installed in the fastening hole.

[0015] Furthermore, the control component includes a fastening bolt II and a fastening nut that match each other, and the fastening bolt II passes through the gear I and the gear II in sequence to cooperate with the fastening nut.

[0016] Furthermore, the traction rod includes a pulley arranged at the end, a display screen arranged on the side of the traction rod for displaying the magnitude of the detected traction force, and a groove arranged at the end of the other side, and a gear II is arranged at the bottom of the groove.

[0017] Furthermore, the air cushion comprises evenly arranged through holes and an inflation port for connecting to an inflatable balloon, and a one-way valve and a deflation valve are provided at the inflation port.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The present invention provides a lifting rod to adjust the overall height of the traction frame to adapt to patients of different heights, and can adjust the traction direction and angle of the traction rope in a wide range. By providing a locking mechanism, when a patient who is too tall or too short in height clinically needs traction treatment of the lower limbs, the control member is adjusted to loosen gears I and II, and then the angle between the traction rod and the lifting rod is adjusted, and then gears I and gear II are locked to achieve adjustment in front of or behind the traction rod, meeting the situation that patients who are too tall or too short in height clinically need traction treatment of the lower limbs, and further control the traction direction and angle of the traction rope, and adjust the length of the traction rope between the traction frame and the limbs, and finally adjust the length of the traction rope through the adjustment component to complete the determination of the magnitude of the traction force. Compared with the prior art that uses traditional weight traction to determine the discrete traction force value, the present invention uses the lifting rod, the locking mechanism and the adjustment component to determine the direction, angle and magnitude of the traction force in the traction process, and the adjustment method is continuous and accurate, the operation is simple, and the treatment and rehabilitation effect is better.

[0020] 2. The traction rope of the present invention respectively fixes the traction bow and the traction rope force measuring piece, the traction rope force measuring piece is a force sensor or an electronic spring scale, preferably an electronic spring scale. The traction rope is provided with an adjusting component for adjusting the tensioning state of the traction rope, the adjusting component includes a torsion barrel and a screw rod, the torsion barrel is provided with a center hole with an internal thread, screw rods are inserted into both ends of the center hole, and the threads of the screw rods at both ends are of opposite structures, which ensures that when the torsion barrel is twisted, the adjusting component is shortened or extended, thereby controlling the tensioning state of the traction rope and adjusting the traction force, and the use of an electronic spring scale can further achieve the effect of increasing the traction force, the adjustment method is continuous and accurate, the operation is simple, and it is easy to control manually. Compared with the determination of discrete traction force values ​​of traditional weight traction, the therapeutic and rehabilitation effect is better.

[0021] 3. The traction frame of the present invention includes a lifting rod hinged on a base, and an adjustment seat is provided outside the lifting rod for limiting the rotation direction and angle of the lifting rod. The adjustment seat includes a mounting hole for inserting the lifting rod. The mounting hole adopts a trapezoidal groove so that the lifting rod can swing left and right. The swing angle is 60°, which meets the clinical demand for traction in the abduction position of the lower limbs and realizes traction in the external oblique direction that conforms to the physiological anatomy of the lower limbs. Compared with the traditional traction frame, the therapeutic rehabilitation effect is more obvious.

[0022] 4. The present invention arranges telescopic rods I, II and III, and the installation position of telescopic rod III on the base can be slidably adjusted. Telescopic rods I, II or III can be manually or automatically adjusted to increase or decrease the angle between the horizontal direction and the vertical direction of the supporting component, and to raise or lower the horizontal supporting plane, thereby driving limb movement. It can be used for early functional training of postoperative patients, promote early rehabilitation activities of the knee joint, effectively improve blood circulation in the lower limbs, promote wound healing, and effectively prevent complications such as joint stiffness and forced adhesion.

[0023] 5. The present invention provides a multifunctional bone traction device, which can control the traction extension and retraction of the telescopic rod III and change the traction angle of the traction rope to adapt to the traction treatment of patients with different heights and different fracture types in the clinic; according to the principle of the inflatable massage bed, a hand-controlled air cushion device is set to intermittently increase and reduce the contact area between the traction limb and the air cushion, so as to achieve the effect of limb massage to improve its blood circulation and prevent the soft tissue from being crushed due to long-term static traction; a disposable cloth pad is used on the air cushion, which is convenient for replacement and effectively prevents the occurrence of air cushion pollution and cross infection in the ward; the present invention controls the telescopic rod I and the telescopic rope to adjust the contact area between the traction limb and the air cushion, and the contact area between the traction limb and the air cushion is increased or decreased ... and the contact area between the traction limb and the air cushion is increased or decreased, and the contact area between the traction limb and the air cushion is increased or decreased, and the contact area between the traction limb and the air cushion is increased or decreased, and the contact area between the traction limb and the air cushion is increased or decreased, and the contact area between the traction limb and the air cushion is increased or decreased, and the contact area between the traction limb and the air cushion is increased or decreased, and the contact area between the traction limb and the air cushion is increased or decreased, and the contact area between the traction limb and the air cushion is increased or decreased, and the contact area between the traction limb and the air cushion is increased or decreased, and The extension and retraction of rod II enables early rehabilitation exercise of the knee joint after surgery, and effectively prevents postoperative joint stiffness and ankylosis adhesion, etc. In addition, the adjustment component is used to control the tensioning traction force of the traction rope instead of the heavy weight traction, which is convenient for continuous adjustment. The traction force of the traction rope is measured by the traction rope force measuring piece, and the display screen shows the reading, which is intuitive. The traction rope force measuring piece is a force sensor or an electronic spring scale, preferably an electronic spring scale. The traction component uses a lifting rod to adjust the position of the pulley at the top of the traction rod, eliminating the cumbersome bedside fixing device, so that it can better meet the clinical treatment needs, is easy to use, simple to operate, and easy to promote and popularize. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the structure of the present invention.

[0026] Figure 2 It is a partial enlarged schematic diagram of point A of the present invention.

[0027] Figure 3 It is a schematic diagram of the structure of component 7 of the present invention.

[0028] Figure 4 It is a schematic diagram of the structure of the component 10 of the present invention.

[0029] Figure 5 It is a schematic diagram of the locking mechanism structure of the present invention.

[0030] Figure 6 It is a schematic diagram of the structure of component 13 of the present invention.

[0031] Figure 7 It is a schematic diagram of the structure of the regulating component of the present invention.

[0032] Figure 8 It is a schematic diagram of the structure of component 6 of the present invention.

[0033] In the figure, 1 is a base, 2 is a telescopic rod I, 3 is a telescopic rod II, 4 is a telescopic rod III, 5 is a connecting rod, 6 is an air cushion, 6 is a through hole, 7 is a slider, 7 is a boss, 8 is a sliding groove, 9 is a crossbeam, 10 is an adjustment seat, 101 is a mounting hole, 102 is a fastening hole, 103 is a fixing plate, 11 is a lifting rod, 111 is a gear I, 12 is a locking mechanism, 13 is a traction rod, 131 is a gear II, 132 is a mounting through hole, 133 is a groove, 15 is a display screen, 16 is a pulley, 17 is a traction rope, 18 is a torsion barrel, 181 is a center hole, 19 is a screw rod, 191 is a hook, 20 is a cloth pad, 21 is a fastening bolt I, 22 is a fastening bolt II, and 23 is a fastening nut. DETAILED DESCRIPTION

[0034] like Figure 1-8 As shown, the present invention comprises a base 1, a supporting component for supporting a patient's limbs and a traction component for traction of the limbs, wherein the traction component comprises a traction frame mounted on the base 1 and a traction rope 17 respectively connecting the traction frame and the limbs, and the traction rope 17 is provided with an adjustment component for adjusting the length of the traction rope;

[0035] The base 1 is composed of two cross bars for mounting support components and a longitudinal bar connecting the two cross bars and used for mounting the traction frame;

[0036] The traction frame includes a lifting rod 11 hinged on the base 1 and a traction rod 13 connected to the lifting rod 11 through a locking mechanism 12;

[0037] The locking mechanism 12 includes a gear I111 fixed to the side end of the lifting rod 11, a gear II131 fixed to the side end of the traction rod 13 and matching the gear I111, and a control member for controlling whether the gear I111 and the gear II131 are engaged. The gear I111 and the gear II131 both include a plurality of racks evenly arranged in a circle, and the installation direction of the racks is consistent with the radial direction of the circle.

[0038] The gear of the present invention includes a fixing plate fixed to the ends of the lifting rod 11 and the traction rod 13 respectively, and a rack fixed to the end of the fixing plate. The racks fixed to the ends of the lifting rod 11 and the traction rod 13 are meshed with each other, and the gear includes gear I 111 and gear II 131; the control part of the present invention includes but is not limited to controlling whether gear I 111 is meshed with gear II 131, and also has the function of clamping and fixing the lifting rod 11 and the traction rod 13.

[0039] The present invention adjusts the overall height of the traction frame to adapt to patients of different heights by setting a lifting rod 11, and can adjust the traction direction and angle of the traction rope 17 in a wide range. By setting a locking mechanism 12, when a patient who is too tall or too short in height clinically needs traction treatment of the lower limbs, the control member is adjusted to loosen the gear I 111 and the gear II 131, and then the angle between the traction rod 13I and the lifting rod 11 is adjusted, and then the gear I 111 and the gear II 131 are locked to achieve adjustment of the front or rear of the traction rod 13, which meets the situation that the patient who is too tall or too short in height clinically needs traction treatment of the lower limbs, further controls the traction direction and angle of the traction rope 17, and adjusts the length of the traction rope 17 between the traction frame and the limbs, and finally adjusts the length of the traction rope 17 through the adjustment component to complete the determination of the magnitude of the traction force. Compared with the prior art that uses the traditional weight traction to determine the discrete traction force value, the present invention uses the lifting rod 11, the locking mechanism 12 and the adjustment component to determine the direction, angle and magnitude of the traction force in the traction process, and the adjustment method is continuous and accurate, the operation is simple, and the treatment and rehabilitation effect is better.

[0040] The supporting component includes a telescopic rod Ⅰ2 and a telescopic rod Ⅱ3 installed on a base 2. The telescopic rod Ⅰ2 and the telescopic rod Ⅱ3 are connected by a telescopic rod Ⅲ4. The installation direction of the telescopic rod Ⅲ4 is consistent with the placement direction of the limb. The telescopic rods Ⅲ4 are connected by a connecting rod 5. The supporting component also includes an air cushion 5 for placing the limb.

[0041] The present invention adopts locking nuts to connect the two ends of telescopic rods Ⅰ2, Ⅱ3 and Ⅲ4, so as to ensure that each connection can be fastened and rotated, and realize the angle adjustment between the support component and the base 1 under the condition of ensuring the stability of the device, so as to adapt to the traction treatment of different limb lengths. The installation position of telescopic rod III on the base can be slidably adjusted, manually adjusted or automatically adjusted. The telescopic rod Ⅰ2, Ⅱ3 or Ⅲ4 can increase or decrease the angle between the horizontal direction and the vertical direction of the support component, raise or lower the horizontal support plane, and then drive the limb movement. It can be used for early functional training of postoperative patients, promote early rehabilitation activities of knee joints, effectively improve blood circulation of lower limbs, promote wound healing, and effectively prevent complications such as joint stiffness and forced adhesion.

[0042] The telescopic rod II3 is hinged on the slider 7, and the base 1 is provided with a slide rail 8 matching the slider 7. In this embodiment, the slider 7 of the present invention is provided with a boss 71, and the base 1 is provided with a matching slide rail 8. The boss 71 is provided with a through hole for passing the fastening bolt I21, and the side of the slide rail 8 is provided with a strip through hole for passing the fastening bolt I21, which is convenient for fastening the bolt I21 and the nut to limit the position of the slider 7 on the base 1, thereby determining the corresponding position of the telescopic rod II3 on ​​the base 1.

[0043] The telescopic rods Ⅰ2, Ⅱ3, Ⅲ4 and lifting rod 11 are all provided with adjusting parts for adjusting their extension or shortening, and the adjusting parts can be manual adjusting parts or electric adjusting parts. There are two telescopic rods Ⅰ2, Ⅱ3 and Ⅲ4, and they are adjusted synchronously.

[0044] The adjusting parts include a reduction motor or a cylinder. To ensure synchronous adjustment between the same telescopic rods, the adjusting parts of the two telescopic rods Ⅰ2 in the present invention are controlled in series, the adjusting parts of the two telescopic rods Ⅱ3 are controlled in series, the adjusting parts of the two telescopic rods Ⅲ4 are controlled in series, and the adjusting parts of the telescopic rods Ⅰ2, Ⅱ3, Ⅲ4 and the lifting rod 11 are controlled in parallel.

[0045] The adjusting assembly includes a torsion barrel 18 and a screw rod 19 respectively arranged at both ends of the torsion barrel 18 and connected by threads. The adjusting assembly of the present invention includes a torsion barrel 18 and a screw rod 19 respectively arranged at both ends of the torsion barrel 18. The torsion barrel 18 is provided with a center hole 181 with an internal thread. One end of the screw rod 19 is installed in the center hole 181, and the other end of the screw rod 19 is provided with a hook 191 for connecting the traction rope 17.

[0046] The traction rope 17 of the present invention respectively fixes the limbs and the traction rope force measuring piece installed in the traction rod 13. The traction rope force measuring piece is a force sensor or an electronic spring scale, preferably an electronic spring scale. The traction rope 17 is provided with an adjusting component for adjusting the tension state of the traction rope 17. The adjusting component includes a torsion barrel 18 and a screw rod 19. The torsion barrel 18 is provided with a center hole 181 with an internal thread. The screw rods 19 are inserted at both ends of the center hole 181. The threads of the screw rods 19 at both ends are of opposite structures, which ensures that when the torsion barrel 18 is twisted, the adjusting component is shortened or extended, thereby controlling the tension state of the traction rope 17 and adjusting the traction force. The use of an electronic spring scale can further achieve the effect of increasing the traction force. The adjustment method is continuous and accurate, simple to operate, and convenient for manual control. Compared with the determination of discrete traction force values ​​of traditional weight traction, the therapeutic rehabilitation effect is better.

[0047] The lifting rod 11 is provided with an adjustment seat 10 for adjusting the rotation direction and angle of the lifting rod 11. The adjustment seat 10 includes a mounting hole 101 for inserting the lifting rod 11 and a fixing plate 103 for mounting the adjustment seat 10 on the base 1. A fastening hole 102 is provided on the side of the mounting hole 101, and a fastener for fastening the position of the lifting rod 11 is installed in the fastening hole 102.

[0048] The traction frame of the present invention includes a lifting rod 11 hinged on a base, and the lifting rod 11 is hinged to a longitudinal rod on a base 1 by bolts, so that the lifting rod 11 can rotate. A limit seat 10 is provided outside the lifting rod 11 for limiting the rotation direction and angle of the lifting rod 11. The limit seat 10 includes a mounting hole 101 for inserting the lifting rod 11. The mounting hole 101 adopts a trapezoidal groove, so that the lifting rod 11 can swing left and right, and the left and right swing angle is 60°, which meets the clinical demand for traction in the abduction position of the lower limbs and realizes traction in the external oblique direction that conforms to the physiological anatomy of the lower limbs. The limit seat 10 is installed on the base 1 by fastening a fixing plate 103 with bolts. The fastening hole 102 of the present invention is arc-shaped, so that the position of the fastener passing through the lifting rod 11 is the same. Compared with the traditional traction frame, the therapeutic rehabilitation effect is more obvious.

[0049] The control component includes a fastening bolt II 22 and a fastening nut 23 that match each other. The fastening bolt II 22 passes through the gear I 111 and the gear II 131 in sequence and cooperates with the fastening nut 23 to facilitate controlling whether the gear I 111 and the gear II 131 are engaged, which is beneficial to adjusting the forward and backward swing of the traction rod 13.

[0050] The traction rod 13 includes a pulley 16 arranged at the end, a display screen 15 arranged on the side of the traction rod 13 for displaying the magnitude of the detected traction force, and a groove 133 arranged at the end of the other side, and a gear II 131 is arranged at the bottom of the groove 133.

[0051] A pulley 16 is provided at the end of the traction rod 13 of the present invention, which is convenient for better changing the direction of the traction rope 17 without affecting the traction force on the traction rope 17. The end face of the traction rod 13 located at the end of the groove 133 is an arc surface, and the side of the groove 133 opposite to the end face of the traction rod 13 is an arc surface, which is convenient for the lock structure 12 to be adjusted. The display screen 15 displays the size of the detected traction force, and the size of the traction force is directly displayed on the display screen 15, so that the traction force is quantified, and the reading is more intuitive, which is convenient for medical staff to operate.

[0052] The air cushion 6 comprises evenly arranged through holes 61 and an inflation port for connecting to an inflatable balloon, and a one-way valve and a deflation valve are provided at the inflation port.

[0053] The air cushion 6 of the present invention is provided with an inflation port, which is connected to the inflatable balloon through an inflation tube. A deflation valve is provided at the inflation port. The deflation valve is closed during inflation, and the inflatable balloon is manually pinched to expand the inflatable cushion to increase the contact area with the traction limb. According to actual clinical needs, the deflation valve is released after a period of time to release the gas. In this way, the intermittent expansion and deflation of the air cushion 6 has a massage effect on the traction limb, thereby improving the blood circulation of the traction limb and effectively preventing complications such as pressure sores, thrombosis or necrosis of soft tissue caused by long-term static traction.

[0054] The air cushion 6 is covered with a cloth pad 20, which can keep the traction limb warm to a certain extent, and is breathable and replaceable, which can effectively prevent the air cushion from being contaminated by pus, blood or dirt, and prevent clinical problems such as cross infection caused by the recycling of traction devices in the ward.

[0055] The present invention provides a multifunctional bone traction device, which can control the traction extension and retraction of the telescopic rod III 4 and change the traction angle of the traction rope 17 to adapt to the traction treatment of patients with different heights and different fracture types in clinical practice; according to the principle of an inflatable massage bed, a hand-controlled air cushion device is provided to intermittently increase or decrease the contact area between the traction limb and the air cushion 6, so as to achieve the effect of limb massage to improve its blood circulation and prevent the soft tissue from being crushed due to long-term static traction; a disposable cloth pad 20 is used on the air cushion 6, which is convenient for replacement and effectively prevents the contamination of the air cushion 6 and the occurrence of cross infection in the ward; the present invention controls the telescopic rod I2 and the telescopic rod II The telescopic movement of the traction rope 17 enables early rehabilitation exercise of the knee joint after surgery, effectively preventing postoperative joint stiffness and ankylosis adhesion, etc.; in addition, the adjustment component is used to control the tension traction force of the traction rope 17 instead of the heavy weight traction, which is convenient for continuous adjustment, and the traction force of the traction rope 17 is measured by the traction rope force measuring piece, which is displayed on the display screen and has intuitive readings. The traction rope force measuring piece is a force sensor or an electronic spring scale, preferably an electronic spring scale; the traction component uses a lifting rod 11 to adjust the position of the pulley 16 at the top of the traction rod 13, eliminating the cumbersome bedside fixing device, so that it can better meet the clinical treatment needs, is easy to use, simple to operate, and easy to promote and popularize.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A bone traction device, comprising a base (1), a support component for supporting a patient's limb, and a traction component for traction of the limb, wherein the traction component comprises a traction frame mounted on the base (1) and a traction rope (17) respectively connecting the traction frame and the limb, characterized in that: The traction rope (17) is provided with an adjustment component for adjusting the length of the traction rope; The traction frame comprises a lifting rod (11) hinged on the base (1) and a traction rod (13) connected to the lifting rod (11) via a locking mechanism (12); The locking mechanism (12) comprises a gear I (111) fixed to a side end of the lifting rod (11), a gear II (131) fixed to a side end of the traction rod (13) and matching the gear I (111), and a control member for controlling whether the gear I (111) and the gear II (131) are meshed. The gear I (111) and the gear II (131) both comprise a plurality of racks evenly arranged in a circle, and the mounting direction of the racks is consistent with the radial direction of the circle. The lifting rod (11) is provided with a gear for adjusting the rotation of the lifting rod (11). A direction and angle adjustment seat (10), the adjustment seat (10) comprising a mounting hole (101) for inserting a lifting rod (11) and a fixing plate (103) for mounting the adjustment seat (10) on a base (1), a fastening hole (102) being provided on a side of the mounting hole (101), a fastener for fastening the position of the lifting rod (11) being installed in the fastening hole (102), the mounting hole (101) being a trapezoidal groove, and the lifting rod (11) swinging left and right in the mounting hole (101) at an angle of 60°.

2. The bone distraction device according to claim 1, characterized in that: The support component comprises a telescopic rod I (2) and a telescopic rod II (3) mounted on a base (1); the telescopic rod I (2) and the telescopic rod II (3) are connected via a telescopic rod III (4); the installation direction of the telescopic rod III (4) is consistent with the placement direction of the limb; the telescopic rods III (4) are connected via a connecting rod (5); and the support component further comprises an air cushion (6) for placing the limb.

3. The bone distraction device according to claim 2, characterized in that: The telescopic rod II (3) is hinged on the slider (7), and the base (1) is provided with a slide rail (8) matching the slider (7).

4. The bone distraction device according to claim 3, characterized in that: The telescopic rod I (2), telescopic rod II (3), telescopic rod III (4) and lifting rod (11) are all provided with adjustment parts capable of adjusting their extension or shortening.

5. The bone distraction device according to claim 4, characterized in that: The adjusting member comprises a reduction motor or a cylinder.

6. The bone distraction device according to any one of claims 1 to 5, characterized in that: The adjustment assembly comprises a torsion barrel (18) and screw rods (19) respectively arranged at two ends of the torsion barrel (18) and connected via threads.

7. The bone distraction device according to any one of claims 1 to 5, characterized in that: The control member comprises a fastening bolt II (22) and a fastening nut (23) which match each other. The fastening bolt II (22) passes through the gear I (111) and the gear II (131) in sequence and matches with the fastening nut (23).

8. The bone distraction device according to any one of claims 1 to 5, characterized in that: The traction rod (13) comprises a pulley (16) arranged at an end, a display screen (15) arranged on a side of the traction rod (13) for displaying the magnitude of the detected traction force, and a groove (133) arranged at the end of the other side, and a gear II (131) is provided at the bottom of the groove (133).

9. The bone distraction device according to any one of claims 2 to 5, characterized in that: The air cushion (6) comprises evenly arranged through holes (61) and an inflation port for connecting to an inflatable balloon, wherein a one-way valve and an air release valve are provided at the inflation port.

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