Orthopedic traction device

Abstract

The application discloses an orthopedic traction device, which comprises an inner rod, a shell, a driving part and a buffer device. The shell is wrapped outside the inner rod, the driving part is connected to the inner rod and is used for driving the inner rod to move along a traction direction relative to the shell. The buffer device comprises a fixing part, a moving part and an elastic part. The fixing part is connected to the shell; the moving part is connected to the driving part, the driving part drives the moving part to move along the traction direction, so that the moving part and the fixing part generate relative displacement; one end of the elastic part is connected to the fixing part, and the other end of the elastic part is connected to the moving part; wherein when the moving part and the fixing part generate relative displacement, the elastic part deforms to buffer the traction force of the driving part acting on the inner rod. By arranging the buffer device in the orthopedic traction device, the effective buffer of the traction force applied to the patient can be achieved during traction in operation, so that the damage of the lower limbs of the patient caused by the sudden application of the traction force can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an orthopedic traction device. BACKGROUND

[0002] In the process of traction, reduction and fixation of lower limbs and other various operations, the patient's foot needs to be fixed to achieve the adjustment of the patient's limb posture in the operation, such as lateral, supine lower limb traction, internal rotation, external rotation, etc. The current traction device is rigid traction, and the end of the traction device directly acts on the patient's lower limb. The operator directly operates the traction handle to traction the patient's lower limb.

[0003] In the prior art, when the rigid traction is used to traction and fix the patient's lower limb, the patient's lower limb may be over-tensioned, which may cause excessive tension injury, and the doctor cannot perceive the traction force. When performing external rotation and internal rotation during traction, the doctor cannot perceive the angle of external rotation and internal rotation. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defect that the patient's lower limb is over-tensioned when the rigid traction is used to traction and fix the patient's lower limb in the prior art, and to provide an orthopedic traction device.

[0005] The present application solves the above technical problems by the following technical solutions:

[0006] An orthopedic traction device, comprising an inner rod, an outer shell and a driving part, the outer shell covering the outer part of the inner rod, the driving part being connected to the inner rod and being used to drive the inner rod to move along the traction direction relative to the outer shell, the orthopedic traction device further comprising a buffer device, the buffer device comprising:

[0007] A fixing part connected to the outer shell;

[0008] A moving part connected to the driving part, the driving part driving the moving part to move along the traction direction, so that the moving part and the fixing part produce relative displacement;

[0009] An elastic part, one end of the elastic part being connected to the fixing part, the other end of the elastic part being connected to the moving part;

[0010] When the moving part and the fixing part produce relative displacement, the elastic part deforms to buffer the traction force of the driving part acting on the inner rod.

[0011] In the scheme, by setting the buffering device, when traction fixation is performed, the traction force from the patient's lower limbs in the operation acts on the buffering device, and with the increase of the traction force, the fixed part does not displace axially due to the constraint of the shell, the moving part moves axially relative to the fixed part due to the force from the inner rod, so that the elastic part deforms to buffer the traction force. By setting the buffering device in the orthopedic traction device, the traction force applied to the patient during the operation can be effectively buffered, thereby reducing the damage to the patient's lower limbs caused by the sudden application of the traction force.

[0012] Preferably, the fixed part and the moving part are both cylindrical and sleeved on the outside of the inner rod.

[0013] Preferably, at least a part of the fixed part is sleeved on the outside of the moving part, or at least a part of the moving part is sleeved on the outside of the fixed part.

[0014] In the scheme, the fixed part and the moving part are cylindrical, which can provide space for the elastic part, and the fixed part and the moving part are sleeved, which facilitates the relative movement of the moving part and the fixed part and saves the length of the buffering device.

[0015] Preferably, the fixed part includes an end face and a cylindrical side wall, the end face is perpendicular to the side wall, a first through hole is formed in the end face for the inner rod to pass through, and an inner surface of the end face is connected to the elastic part.

[0016] Preferably, a second through hole is formed in the inside of the moving part, and an abutting portion is arranged in the second through hole, the abutting portion protrudes inward from the wall surface of the second through hole, and the abutting portion is used to abut against the elastic part.

[0017] In the scheme, the second through hole is used to accommodate the elastic part, and the abutting portion is used to connect the elastic part.

[0018] Preferably, the buffering device further includes a tension scale, the tension scale is arranged on the outer surface of the moving part, a tension scale is arranged on the tension scale in the traction direction, the tension scale is set according to the deformation amount and the stiffness coefficient of the elastic part, and the intersection of the side wall surface of the fixed part and the side wall surface of the moving part indicates the scale value to represent the traction force.

[0019] In the present scheme, the tension value borne by the lower limbs of the patient can be reflected in real time on the tension scale, providing an intuitive reference for the operating physician, who can intuitively understand the size of the traction force borne by the lower limbs of the patient, thereby effectively reducing the lower limb injury caused by excessive traction force due to subjective experience errors, and reducing the possibility of excessive injury to the lower limbs of the patient due to traction. Specifically, during the traction process, the operator can continuously observe the traction force size on the tension scale, slowly adjust the inner rod, and reach the required traction strength. In addition, during the traction process, internal rotation and abduction need to be implemented according to the requirements, at this time, the scale will change with the change of the length of the patient's lower limbs, and the operator can also observe the traction strength represented by the tension scale in time.

[0020] Preferably, the orthopedic traction device further comprises a circumferential adjustment scale, which is sleeved on the outer wall surface of the shell, and the circumferential adjustment scale is uniformly provided with a scale of 0-360 degrees in the circumferential direction.

[0021] In the present scheme, the circumferential adjustment scale can be used to represent the angles of internal rotation and abduction for each operation. Specifically, during the traction operation of abduction and adduction, the operator can observe the scale value of the circumferential scale in time until the required operation posture is completed.

[0022] Preferably, the circumferential adjustment scale is provided with a locking mechanism for locking the circumferential adjustment scale on the shell.

[0023] And / or, a standard line is arranged on the outer wall surface of the shell, and the 0-degree scale in the circumferential adjustment scale is aligned with the standard line.

[0024] In the present scheme, after adjusting the 0-degree scale of the circumferential adjustment scale to a predetermined position, the circumferential adjustment scale can be locked by the locking mechanism. By arranging the standard line, after completing the fixation of the lower limbs of the patient, the circumferential adjustment scale can be adjusted so that the 0-degree scale corresponds to the standard line, and then the circumferential adjustment scale is locked.

[0025] Preferably, the inner rod comprises a screw rod part, the screw rod part is threadedly connected with the shell, and the driving part drives the inner rod to move relative to the shell in the traction direction.

[0026] Preferably, the driving part is arranged at the end of the orthopedic traction device, and the buffer device is arranged between the driving part and the shell.

[0027] In the present scheme, the buffer device is arranged at the above position, which is not easily covered by the medical protection sheet, and is relatively close to the operator, so as to be observed in time.

[0028] Preferably, the orthopedic traction device further comprises a traction boot, the inner rod is connected to the traction boot and drives the traction boot to move;

[0029] Preferably, the driving part comprises a driving handle, the driving handle is connected to the inner rod, and the driving handle rotates to drive the inner rod to move;

[0030] Preferably, the elastic member is a spring.

[0031] Preferably, a thrust bearing is arranged between the buffer device and the outer shell.

[0032] Preferably, a sliding gasket is arranged between the buffer device and the outer shell.

[0033] On the basis of common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, to obtain each preferred embodiment of the present application.

[0034] The positive progress effect of the present application is that:

[0035] By arranging the buffer device, when traction fixation is performed, the traction force from the traction on the lower limbs of the patient acts on the buffer device during the operation. With the increase of the traction force, the fixing member does not displace axially due to the constraint of the outer shell, and the moving member moves axially relative to the fixing member due to the force from the driving part, so that the elastic member deforms to buffer the traction force. By arranging the buffer device in the orthopedic traction device, the traction force applied to the patient can be effectively buffered during the operation, so as to reduce the damage to the lower limbs of the patient caused by the sudden application of the traction force. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a top view of the orthopedic traction device according to the preferred embodiment of the present application.

[0037] Figure 2 It is a sectional view of the orthopedic traction device according to the preferred embodiment of the present application.

[0038] Figure 3 It is Figure 1 It is an enlarged view of A in FIG. 1, which shows a tension scale.

[0039] Figure 4 It is Figure 2 It is an enlarged view of C in FIG. 1.

[0040] Figure 5 It is a sectional view of the fixing member according to the preferred embodiment of the present application.

[0041] Figure 6 It is a sectional view of the moving member according to the preferred embodiment of the present application.

[0042] Figure 7 A perspective view of a circumferential adjustment scale according to a preferred embodiment of the present application.

[0043] Figure 8 A perspective view of a circumferential adjustment scale according to a preferred embodiment of the present application. Figure 1 An enlarged view at B showing the circumferential adjustment scale.

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045] Orthopedic traction device 100

[0046] Housing 1

[0047] Inner rod 2

[0048] Fixing member 3

[0049] Moving member 4

[0050] Driving portion 5

[0051] Elastic member 6

[0052] First position 7

[0053] Second position 8

[0054] Third position 9

[0055] Tension scale 10

[0056] Screw rod portion 21

[0057] Circumferential adjustment scale 11

[0058] Locking mechanism 12

[0059] First through hole 31

[0060] Side wall 32

[0061] End face 33

[0062] Second through hole 41 DETAILED DESCRIPTION

[0063] The present application will be further described by way of example with reference to the accompanying drawings.

[0064] The present embodiment discloses an orthopedic traction device 100, which comprises an inner rod 2, a housing 1 and a driving portion 5. The housing 1 is wrapped outside the inner rod 2, and the driving portion 5 is connected to the inner rod 2 and used to drive the inner rod 2 to move along a traction direction relative to the housing 1. As shown in the drawings, the inner rod 2 is provided with a first position 7, a second position 8 and a third position 9. The first position 7 is located at a first end of the inner rod 2, the second position 8 is located at a second end of the inner rod 2, and the third position 9 is located between the first position 7 and the second position 8. Figures 1-8As shown, the orthopedic traction device 100 further comprises a buffering device, which comprises a fixed part 3, a moving part 4 and an elastic part 6. The fixed part 3 is connected to the housing 1; the moving part 4 is connected to the driving part 5, which drives the moving part 4 to move along the traction direction, so that the moving part 4 and the fixed part 3 produce relative displacement; one end of the elastic part 6 is connected to the fixed part 3, and the other end of the elastic part 6 is connected to the moving part 4; wherein when the moving part 4 and the fixed part 3 produce relative displacement, the elastic part 6 deforms to buffer the traction force of the driving part 5 acting on the inner rod 2.

[0065] By setting the buffering device, when traction fixation is performed, the traction force from the patient's lower limbs in the operation acts on the buffering device. With the increase of the traction force, the fixed part 3 does not produce axial displacement due to the constraint of the housing 1, and the moving part 4 produces axial relative motion with the fixed part 3 due to the force from the driving part 5, so that the elastic part 6 deforms to buffer the traction force. By setting the buffering device in the orthopedic traction device 100, the effective buffering of the traction force applied to the patient can be achieved during the traction in the operation, so as to reduce the damage to the patient's lower limbs caused by the sudden application of the traction force.

[0066] The fixed part 3 and the moving part 4 can be both cylindrical and sleeved on the outside of the inner rod 2; wherein at least a part of the fixed part 3 is sleeved on the outside of the moving part 4. By setting the fixed part 3 and the moving part 4 as cylindrical, the elastic part 6 can be arranged inside the cylinder, thereby providing space for the arrangement of the elastic part 6; the fixed part 3 and the moving part 4 are stacked and sleeved, which is conducive to realizing the relative motion of the moving part 4 and the fixed part 3, and saves the length of the buffering device. Specifically, the inner diameter of the fixed part 3 and the outer diameter of the moving part 4 are matched with each other, and a gap fit is adopted.

[0067] It should be noted that in other alternative embodiments, at least a part of the moving part 4 can also be sleeved on the outside of the fixed part 3, which can also achieve the above-mentioned effects.

[0068] The fixed part 3 can comprise an end face 33 and a cylindrical side wall 32, the end face 33 is perpendicular to the side wall 32, a first through hole 31 is formed in the end face 33 for the inner rod 2 to pass through, and the inner surface of the end face 33 is connected to the elastic part 6. The hole diameter of the first through hole 31 and the inner rod 2 should be matched with each other, and a small gap fit is adopted, and the gap value can be taken in the range of 0.05mm to 0.1mm. The inner diameter of the side wall 32 and the outer wall of the elastic part 6 are matched with each other, and a large gap fit is adopted, and the gap value can be taken in the range of 0.2mm to 0.5mm.

[0069] The inside of the moving part 4 can be provided with a second through hole 41, and an abutting portion is arranged in the second through hole 41, the abutting portion protrudes inward from the wall surface of the second through hole, and the abutting portion is used for abutting with the elastic part.

[0070] Specifically, the second through hole 41 has a first aperture and a second aperture in sequence in the direction away from the fixing member 3, the first aperture is larger than the second aperture, and the variable cross-section of the second through hole 41 is in abutment with the elastic member 6. The variable cross-section forms the abutment part described above, the space between the first aperture of the second through hole 41 and the inner rod 2 is used to accommodate the elastic member 6, and the variable cross-section is used to fix the elastic member 6. Among them, the size of the first aperture and the outer diameter of the elastic member 6 are clearance fit with each other, and the clearance fit is taken, and the clearance value can be taken in the range of 0.2mm to 0.5mm. The size of the second aperture should be clearance fit with the inner rod 2, and the small clearance is taken, and the clearance value can be taken in the range of 0.05mm to 0.1mm. In this way, the setting can avoid the shaking of the moving member 4 in the moving process due to the deviation of the axial direction, which can affect the accuracy of the tension scale 10.

[0071] The buffer device can also include a tension scale 10, the tension scale 10 is arranged on the outer surface of the moving member 4, and the tension scale 10 is provided with a tension scale in the traction direction, and the tension scale is set according to the deformation amount and the stiffness coefficient of the elastic member 6. The intersection of the side wall 32 of the fixing member 3 and the side wall 32 of the moving member 4 indicates the scale value to represent the traction force. The number of tension scales 10 should be not less than two, and they are uniformly arranged in the circumferential direction. In other alternative embodiments, the tension scale 10 can also be arranged on the outer surface of the fixing member 3.

[0072] The tension value borne by the lower limbs of the patient can be reflected on the tension scale 10 in real time, providing an intuitive reference for the operator. The operator can intuitively understand the size of the traction force borne by the lower limbs of the patient, so as to effectively reduce the lower limb injury caused by the excessive traction force due to subjective experience error, so as to reduce the possibility of excessive injury of the lower limbs of the patient due to traction. Specifically, during the traction process, the operator can continuously observe the traction force on the tension scale 10, and slowly adjust the inner rod 2 until the required traction strength is reached. In addition, during the traction process, it is necessary to implement internal rotation and abduction according to the needs, at this time, the scale will change with the change of the length of the lower limbs of the patient, and the operator can also observe the traction strength represented by the tension scale in time.

[0073] The orthopedic traction device 100 further comprises a circumferential adjustment scale 11, which is arranged on the outer wall of the shell 1, and the circumferential adjustment scale 11 is uniformly provided with a scale of 0 degrees to 360 degrees in the circumferential direction. By setting the circumferential adjustment scale 11, the internal rotation, abduction and other angles can be represented for each operation. Specifically, during the traction operation of abduction, adduction and the like, the operator can observe the scale value corresponding to the circumferential scale in time until the required operation posture is completed. Specifically, the scale mark should be not less than 4, of which 0°, 90°, 180° and 270° are clearly marked.

[0074] The circumferential adjustment scale 11 can be provided with a locking mechanism 12 for locking the circumferential adjustment scale 11 on the outer shell 1. The outer shell 1 is provided with a standard line, and the 0-degree scale of the circumferential adjustment scale 11 is aligned with the standard line. After adjusting the 0-degree scale of the circumferential adjustment scale 11 to a preset position, the circumferential adjustment scale 11 can be locked by the locking mechanism 12. By setting the standard line, after completing the fixation of the lower limbs of the patient, the circumferential adjustment scale 11 can be adjusted so that the 0-degree scale corresponds to the standard line, and then the circumferential adjustment scale 11 is locked.

[0075] Specifically, the circumferential adjustment scale 11 is provided with a threaded hole, and the axis of the threaded hole is perpendicular to the outer surface of the circumferential adjustment scale 11. The locking mechanism 12 includes a locking nut corresponding to the threaded hole, the length of the thread of the locking nut should be 1.5 times or more than the thickness of the circumferential adjustment scale 11, the thickness of the circumferential adjustment scale 11 is not less than 1mm, the head of the locking nut is provided with a longitudinal slot, which is uniformly distributed along the circumference, which can adopt a vertical "acute angle" type, or a "knurled type", etc., which can meet the requirements. The length of the head of the locking nut should be not less than 2mm, and the diameter of the head of the locking nut should be not less than the outer diameter size of the threaded hole, and not more than the width size of the circumferential adjustment scale 11.

[0076] The inner rod 2 can include a screw rod part 21, which is threadedly connected with the outer shell 1, and the driving part 5 drives the inner rod 2 to move along the traction direction relative to the outer shell 1.

[0077] The driving part 5 is arranged at the end of the orthopedic traction device 100, and the buffer device is arranged between the driving part 5 and the outer shell 1, as shown in the first position 7 in Figure 1 The buffer device is arranged at the above position, which is not easy to be covered by the medical protective sheet, and is close to the operator, which is convenient for timely observation.

[0078] It should be noted that in other alternative embodiments, the buffer device can also be arranged at other positions, such as the second position 8 and the third position 9 shown in Figure 1 As long as the position arranged can make the fixed part remain fixed, and the moving part is driven by the inner rod 2 to produce relative displacement.

[0079] The orthopedic traction device 100 can also include a traction boot, and the inner rod 2 is connected to the traction boot and drives the traction boot to move.

[0080] The driving part 5 can comprise a driving handle connected to the inner rod 2, and the driving handle rotates to drive the inner rod 2 to move. The elastic member 6 is a spring. A thrust bearing is arranged between the buffer device and the shell 1. In other alternative embodiments, a sliding gasket can also be arranged between the buffer device and the shell 1. It should be noted that in the present embodiment, the driving handle drives the moving part 4 to move in the traction direction, and in other alternative embodiments, the moving part 4 can also be connected to the inner rod 2, and the moving part 4 is directly driven by the inner rod 2 to move, as long as the relative displacement of the moving part 4 and the fixed part 3 can be realized.

[0081] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. An orthopedic traction device, comprising an inner rod, a outer shell, and a drive unit, wherein the outer shell covers the outside of the inner rod, and the drive unit is connected to the inner rod and is used to drive the inner rod to move relative to the outer shell along a traction direction, characterized in that, The orthopedic traction device further comprises a buffer device, the buffer device comprising: a fixed part connected to the shell; a moving part connected to the inner rod, the inner rod driving the moving part to move along the traction direction, so that the moving part and the fixed part produce relative displacement; a resilient part, one end of the resilient part being connected to the fixed part, the other end of the resilient part being connected to the moving part; wherein when the moving part and the fixed part produce relative displacement, the resilient part deforms to buffer the traction force of the driving part acting on the inner rod; the fixed part and the moving part are both cylindrical and are sleeved on the outside of the inner rod; wherein at least a part of the fixed part is sleeved on the outside of the moving part, or at least a part of the moving part is sleeved on the outside of the fixed part; the buffer device further comprises a tension scale, the tension scale being arranged on the outer surface of the moving part, or the tension scale being arranged on the outer surface of the fixed part; the tension scale is provided with a tension scale along the traction direction, the tension scale being set according to the deformation amount and the stiffness coefficient of the resilient part, and the intersection of the side wall surface of the fixed part and the side wall surface of the moving part indicating the scale value to represent the traction force; the inside of the moving part is provided with a second through hole, and the second through hole is provided with an abutting part, the abutting part protruding inward from the wall surface of the second through hole, and the abutting part being used for abutting and fixing the resilient part.

2. The orthopedic traction device of claim 1, wherein, the fixed part comprises an end surface and a cylindrical side wall, the end surface being perpendicular to the side wall, the end surface being provided with a first through hole for the inner rod to pass through, and the inner surface of the end surface being connected to the resilient part.

3. The orthopedic traction device of claim 1, wherein, The orthopedic traction device further comprises a circumferential adjustment scale, the circumferential adjustment scale being sleeved on the outer wall surface of the shell, and the circumferential adjustment scale being uniformly provided with a scale of 0 degrees to 360 degrees along the circumference.

4. The orthopedic traction device of claim 3, wherein, The circumferential adjustment scale is provided with a locking mechanism, the locking mechanism being used for locking the circumferential adjustment scale on the shell; and / or, the outer wall surface of the shell is provided with a standard line, and the 0-degree scale in the circumferential adjustment scale is aligned with the standard line.

5. The orthopedic traction device of claim 1, wherein, The inner rod comprises a screw rod part, the screw rod part being threadedly connected with the shell, and the driving part driving the inner rod to move relative to the shell along the traction direction.

6. The orthopedic traction device of claim 1, wherein, The driving part is arranged at the end of the orthopedic traction device, and the buffer device is arranged between the driving part and the shell.

7. The orthopedic traction device of any one of claims 1-6, wherein, The orthopedic traction device further comprises a traction boot, the inner rod being connected to the traction boot and driving the traction boot to move; and / or, the driving part comprises a driving handle, the driving handle being connected to the inner rod, and the driving handle being rotated to drive the inner rod to move; and / or, the resilient part is a spring; and / or, a thrust bearing is arranged between the buffer device and the shell; and / or, a sliding gasket is arranged between the buffer device and the shell.

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