CN114224406A

CN114224406A - Orthopedics traction device

Info

Publication number: CN114224406A
Application number: CN202111252421.XA
Authority: CN
Inventors: 付亚波; 叶震; 张长青; 赵志浩
Original assignee: Shanghai Electric Group Corp
Current assignee: Shanghai Electric Group Corp
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-03-25

Abstract

The invention discloses an orthopedic traction device which comprises an inner rod, a shell, a driving part and a buffer device, wherein the shell is coated outside the inner rod, and the driving part is connected with the inner rod and used for driving the inner rod to move along a traction direction relative to the shell. The buffer device comprises a fixed part, a moving part and an elastic part. The fixing piece is connected with the shell; the moving part is connected with the driving part, and the driving part drives the moving part to move along the traction direction so as to enable the moving part and the fixed part to generate relative displacement; one end of the elastic part is connected with the fixed part, and the other end of the elastic part is connected with the moving part; when the moving part and the fixed part generate relative displacement, the elastic part deforms to buffer the traction force of the driving part acting on the inner rod. Through set up buffer in orthopedics traction device, can play the effective buffering to the traction force that the patient applyed when drawing in the art to can reduce because the sudden application of traction force brings the damage to patient's low limbs.

Description

Orthopedics traction device

Technical Field

The invention relates to the technical field of medical instruments, in particular to an orthopedic traction device.

Background

During various operations such as traction, reduction and fixation of lower limbs, the feet of a patient need to be fixed, so that the posture adjustment requirements in the operations such as lateral and horizontal lower limb traction, internal rotation and external expansion of the limbs of the patient in the operations are met. The existing traction device is rigid traction, the tail end of the traction device directly acts on the lower limb of a patient, and a doctor operates a traction handle directly to draw the lower limb of the patient.

In the prior art, when the lower limbs of a patient are pulled and fixed by rigid traction, the lower limbs of the patient are excessively pulled, so that the risk of redundant strain is caused, and the perception of a doctor on the traction force cannot be met. When the doctor performs the outward rotation and inward contraction operations in the traction process, the doctor cannot sense the outward rotation and inward contraction angles.

Disclosure of Invention

The invention aims to solve the technical problem of providing an orthopedic traction device in order to overcome the defect that the lower limb of a patient is excessively pulled when rigid traction is used for traction and fixation of the lower limb of the patient in the prior art.

The invention solves the technical problems through the following technical scheme:

the utility model provides an orthopedics draw gear, includes interior pole, shell and drive division, the shell cladding in the outside of interior pole, the drive division connect in interior pole, and be used for the drive interior pole for the shell moves along traction direction, orthopedics draw gear still includes buffer, buffer includes:

a fixing member connected to the housing;

the moving piece is connected to the driving part, and the driving part drives the moving piece to move along the traction direction so as to enable the moving piece and the fixed piece to generate relative displacement;

one end of the elastic part is connected with the fixed part, and the other end of the elastic part is connected with the moving part;

when the moving part and the fixed part generate relative displacement, the elastic part deforms to buffer the traction force of the driving part on the inner rod.

In this scheme, through setting up buffer, when pulling fixedly, the art comes from the traction force to patient's low limbs and acts on buffer, along with pulling tensile increase, the mounting is owing to receive the restraint of shell, and the axial does not take place the displacement, and the moving member is owing to receive the power that comes from interior pole to take place axial relative motion with the mounting, make the elastic component take place deformation, with buffering traction force. Through set up buffer in orthopedics traction device, can play the effective buffering to the traction force that the patient applyed when drawing in the art to can reduce because the sudden application of traction force brings the damage to patient's low limbs.

Preferably, the fixed part and the moving part are both cylindrical and are sleeved outside the inner rod;

at least one part of the fixed part is sleeved outside the moving part, or at least one part of the moving part is sleeved outside the fixed part.

In the scheme, the fixed part and the moving part are arranged in a cylindrical shape, and the elastic part can be arranged in the cylinder body, so that a space is provided for the arrangement of the elastic part; the fixing piece and the moving piece are sleeved in a stacking mode, relative movement of the moving piece and the fixing piece is facilitated, and the length of the buffer device is saved.

Preferably, the fixing part comprises an end surface and a cylindrical side wall, the end surface is perpendicular to the side wall, a first through hole for the inner rod to pass through is formed in the end surface, and the inner surface of the end surface is connected to the elastic part.

Preferably, a second through hole is formed in the moving member, an abutting portion is arranged in the second through hole, the abutting portion protrudes inwards from a wall surface of the second through hole, and the abutting portion is used for abutting against the elastic member.

In this scheme, the second through-hole is used for holding the elastic component, and the butt portion is used for connecting the elastic component.

Preferably, the buffer device further comprises a tension scale, the tension scale is arranged on the outer surface of the moving member, tension scales are arranged on the tension scale along the traction direction, the tension scales are arranged according to the deformation amount and the stiffness coefficient of the elastic member, and the scale value is indicated at the junction of the side wall surface of the fixed member and the side wall surface of the moving member to represent the traction force.

In this scheme, the pulling force value that patient's low limbs bore can reflect on the pulling force scale in real time, for operating the doctor and provide audio-visual reference, the size of the traction force that patient's low limbs received can directly perceivedly be known to the operating doctor to can effectively reduce because the too big low limbs damage that arouses of traction force that subjective experience error leads to, with the possibility that the unnecessary pull injury appears owing to receiving to pull in the reduction patient low limbs. Specifically, in the traction process, an operator can continuously observe the traction force on the tension ruler and slowly adjust the inner rod until the required traction strength is achieved. In addition, internal rotation and external expansion are required to be implemented according to requirements in the traction process, the scales can be changed along with the influence of the change of the length of the lower limbs of the patient on the buffer device, and an operator can observe the traction strength represented by the tension scales in time.

Preferably, orthopedics draw gear still includes the circumference and adjusts the scale, circumference is adjusted the scale cover and is located the outer wall of shell, circumference is adjusted the scale and is evenly provided with 0 degree to 360 degrees scales along circumference.

In this scheme, through setting up circumference regulation scale, can characterize to angles such as internal rotation, abduction to every operation. Specifically, when traction operations such as abduction and adduction are performed, an operator can observe the scale values corresponding to the circumferential scale in time until a required surgical posture is completed.

Preferably, a locking mechanism is arranged on the circumferential adjustment scale and 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.

In this scheme, can adjust the 0 degree scale of circumference regulation scale to predetermined position after, lock the circumference regulation scale through locking mechanical system. By setting the standard lines, after the lower limbs of the patient are fixed, the circumferential adjusting scale can be adjusted to enable the 0-degree scale to correspond to the standard lines, and then the circumferential adjusting scale is locked.

Preferably, the inner rod comprises a threaded rod part, the threaded rod part is in threaded connection with the shell, and the driving part drives the inner rod to move relative to the shell along the traction direction.

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

In this scheme, set up buffer in above-mentioned position, be difficult for by medical treatment protection shop list cover, apart from the operator distance nearer simultaneously, be convenient for in time observe.

Preferably, the orthopedic traction device further comprises a traction shoe, and the inner rod is connected to the traction shoe and drives the traction shoe to move;

and/or the driving part comprises a driving handle, the driving handle is connected with the inner rod, and the driving handle rotates to drive the inner rod to move;

and/or the elastic 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.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

through setting up buffer, when pulling the fixing, the traction force that comes from to patient's low limbs in the art acts on buffer, and along with pulling the increase of pulling force, the mounting is owing to receive the restraint of shell, and the axial displacement does not take place, and the moving member is owing to receive the power that comes from the drive division to take place axial relative motion with the mounting, make the elastic component take place deformation elastic component, with buffering traction force. Through set up buffer in orthopedics traction device, can play the effective buffering to the traction force that the patient applyed when drawing in the art to can reduce because the sudden application of traction force brings the damage to patient's low limbs.

Drawings

Fig. 1 is a top view of an orthopedic traction device in accordance with a preferred embodiment of the present invention.

Fig. 2 is a cross-sectional view of an orthopedic traction device according to a preferred embodiment of the present invention.

Fig. 3 is an enlarged view of fig. 1 at a, showing a pull force scale.

Fig. 4 is an enlarged view at C in fig. 2.

Fig. 5 is a cross-sectional view of a fixing member according to a preferred embodiment of the present invention.

Fig. 6 is a sectional view of a moving member according to a preferred embodiment of the present invention.

Fig. 7 is a perspective view of a circumferential adjustment scale according to a preferred embodiment of the present invention.

Fig. 8 is an enlarged view at B in fig. 1, in which a circumferential adjustment scale is shown.

Description of reference numerals:

orthopedic traction device 100

Outer casing 1

Inner rod 2

Fixing member 3

Moving part 4

Drive unit 5

Elastic member 6

First position 7

Second position 8

Third position 9

Tension scale 10

Thread rod part 21

Circumferential adjustment scale 11

Locking mechanism 12

First through hole 31

Side wall 32

End face 33

Second through hole 41

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

The embodiment discloses an orthopedic traction device 100, which comprises an inner rod 2, a shell 1 and a driving part 5, wherein the shell 1 is covered outside the inner rod 2, and the driving part 5 is connected to the inner rod 2 and used for driving the inner rod 2 to move along a traction direction relative to the shell 1. As shown in fig. 1 to 8, the orthopedic traction device 100 further comprises a buffer device including a fixed member 3, a moving member 4 and an elastic member 6. The fixed part 3 is connected with the shell 1; the moving part 4 is connected with the driving part 5, and the driving part 5 drives the moving part 4 to move along the traction direction so as to enable the moving part 4 and the fixed part 3 to generate relative displacement; one end of the elastic element 6 is connected with the fixed element 3, and the other end of the elastic element 6 is connected with the moving element 4; when the moving part 4 and the fixed part 3 generate relative displacement, the elastic part 6 deforms to buffer the traction force of the driving part 5 acting on the inner rod 2.

Through setting up buffer, when pulling the fixing, the traction force that comes to patient's low limbs in the art acts on buffer, and along with pulling the increase of pulling force, mounting 3 is owing to receive the restraint of shell 1, and the axial does not take place the displacement, and moving member 4 is owing to receive the power that comes from drive division 5 to take place axial relative motion with mounting 3, make elastic component 6 take place the deformation, with buffering traction force. By arranging the buffer device in the orthopedic traction device 100, the traction force applied to the patient can be effectively buffered during the intraoperative traction, so that the damage to the lower limb of the patient caused by the sudden application of the traction force can be reduced.

The fixed part 3 and the moving part 4 can be both cylindrical and are sleeved outside the inner rod 2; wherein, at least a part of the fixed part 3 is sleeved outside the moving part 4. The fixed part 3 and the movable part 4 are arranged in a cylindrical shape, and the elastic part 6 can be arranged in the cylindrical body, so that a space is provided for arranging the elastic part 6; the fixed piece 3 and the moving piece 4 are sleeved in a stacking mode, relative movement of the moving piece 4 and the fixed piece 3 is facilitated, and the length of the buffer device is saved. Specifically, the inner diameter of the fixed member 3 and the outer diameter of the moving member 4 are of a fitting size with each other, and are in clearance fit.

It should be noted that, in other alternative embodiments, at least a portion of the moving member 4 may be sleeved outside the fixed member 3, and the above-mentioned effects can also be achieved.

The fixing member 3 may include an end surface 33 and a cylindrical side wall 32, the end surface 33 is perpendicular to the side wall 32, the end surface 33 is provided with a first through hole 31 for the inner rod 2 to pass through, and an inner surface of the end surface 33 is connected to the elastic member 6. The aperture of the first through hole 31 and the inner rod 2 should be matched with each other in size, and a small clearance fit is adopted, and the desirable range of the clearance value is 0.05mm to 0.1 mm. The inner diameter of the side wall 32 and the outer wall of the elastic element 6 are of a matched size, and a large clearance fit is adopted, and the clearance value can be in a range of 0.2mm to 0.5 mm.

The moving member 4 may have a second through hole 41 formed therein, and an abutting portion protruding inward from a wall surface of the second through hole is provided in the second through hole 41 and is configured to abut against the elastic member.

Specifically, the second through hole 41 has a first aperture and a second aperture in sequence along a 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 abuts against the elastic member 6. The above-mentioned abutting portion is formed at the variable cross section, the space between the first aperture of the second through hole 41 and the inner rod 2 is used for accommodating the elastic member 6, and the elastic member 6 is fixed at the variable cross section. The size of the first aperture and the outer diameter of the elastic piece 6 are in clearance fit, a large clearance fit is adopted, and the desirable range of the clearance value is 0.2mm to 0.5 mm. The second aperture size should be each other clearance fit with interior pole 2, gets the close clearance, and the desirable scope of its clearance value is 0.05mm to 0.1mm, sets up like this and can avoid moving member 4 to shift the axial and take place to rock at the removal in-process, leads to influencing the accuracy nature of tensiometer scale 10.

Buffer can also include the tension scale 10, and tension scale 10 sets up the surface at moving member 4, and the last direction of pulling that is provided with of tension scale 10, and the setting of the deformation volume and the coefficient of stiffness of elastic component 6 is followed to the tension scale, and the juncture of the 32 faces of lateral wall 32 of mounting 3 and the 32 faces of lateral wall of moving member 4 indicates the scale value in order to characterize traction force. The number of the pull scales 10 should be not less than two and uniformly arranged along the circumferential direction. In other alternative embodiments, the pull gauge 10 may also be provided on the outer surface of the fixture 3.

The pulling force value born by the lower limb of the patient can be reflected on the pulling force scale 10 in real time, so that visual reference is provided for an operating doctor, and the operating doctor can visually know the traction force applied to the lower limb of the patient, so that the lower limb damage caused by overlarge traction force due to subjective experience errors can be effectively reduced, and the possibility of redundant pull injury of the lower limb of the patient due to traction is reduced. Specifically, in the traction process, an operator can continuously observe the traction force on the pull force scale 10 and slowly adjust the inner rod 2 until the required traction strength is achieved. In addition, internal rotation and external expansion are required to be implemented according to requirements in the traction process, the scales can be changed along with the influence of the change of the length of the lower limbs of the patient on the buffer device, and an operator can observe the traction strength represented by the tension scales in time.

Orthopedics draw gear 100 still includes circumference regulation scale 11, and the outer wall of shell 1 is located to circumference regulation scale 11 cover, and circumference regulation scale 11 evenly is provided with 0 degree to 360 degrees scales along circumference. Through setting up circumference regulation scale 11, can characterize to angles such as internal rotation, abduction to every operation. Specifically, when traction operations such as abduction and adduction are performed, an operator can observe the scale values corresponding to the circumferential scale in time until a required surgical posture is completed. Specifically, the scale mark is not less than 4, wherein 0 °, 90 °, 180 °, and 270 ° are clearly marked.

A locking mechanism 12 may be provided on the circumferential adjustment scale 11, the locking mechanism 12 being used to lock the circumferential adjustment scale 11 on the housing 1. The outer wall surface of the shell 1 is provided with a standard line, and the 0-degree scale in the circumferential adjusting scale 11 is aligned with the standard line. The circumferential adjustment scale 11 may be locked by the locking mechanism 12 after adjusting the 0-degree scale of the circumferential adjustment scale 11 to a preset position. By setting the standard line, after the lower limb of the patient is fixed, 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.

Specifically, a threaded hole is provided on the circumferential adjustment scale 11, and an axis of the threaded hole is perpendicular to an outer surface of the circumferential adjustment scale 11. The locking mechanism 12 comprises a locking nut corresponding to the threaded hole, the thread length of the locking nut is 1.5 times or more of the wall thickness of the circumferential adjusting scale 11, the thickness of the circumferential adjusting scale 11 is not less than 1mm, a longitudinal groove is formed in the head of the locking nut and is uniformly distributed along the circumference, and the locking nut can adopt a vertical acute angle shape or a rolling flower shape and the like and can meet the requirements. The length of the head of the locking nut is not less than 2mm, the diameter of the head of the locking nut is not less than the outer diameter of the threaded hole and not more than the width of the circumferential adjusting scale 11.

The inner rod 2 may comprise a screw rod portion 21, the screw rod portion 21 is in threaded connection with the housing 1, and the driving portion 5 drives the inner rod 2 to move in a traction direction relative to the housing 1.

The drive portion 5 is provided at the end of the orthopaedic traction device 100 and the buffer means is provided between the drive portion 5 and the housing 1, as shown in fig. 1 in a first position 7. The buffer device is arranged at the position, is not easily covered by the medical protection sheet, and is close to the operator, so that the medical protection sheet is convenient to observe in time.

It should be noted that, in other alternative embodiments, the buffering device may be disposed at other positions, such as the second position 8 and the third position 9 shown in fig. 1, as long as the disposed positions enable the fixed portion to be kept fixed, and the movable portion is driven by the inner rod 2 to generate relative displacement.

The orthopedic traction device 100 may further include a traction shoe, and the inner rod 2 is connected to the traction shoe and drives the traction shoe to move.

The driving part 5 can comprise a driving handle which is connected to the inner rod 2 and 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 may be provided between the damping device and the housing 1. It should be noted that, in this embodiment, the driving handle drives the moving member 4 to move along the traction direction, and in other alternative embodiments, the moving member 4 may also be connected to the inner rod 2, and the inner rod 2 directly drives the moving member 4 to move, as long as the relative displacement between the moving member 4 and the fixing member 3 can be realized.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. The utility model provides an orthopedics draw gear, includes interior pole, shell and drive division, the shell cladding in the outside of interior pole, the drive division connect in interior pole, and be used for the drive interior pole for the shell removes along traction direction, a serial communication port, orthopedics draw gear still includes buffer, buffer includes:

a fixing member connected to the housing;

the inner rod drives the moving piece to move along the traction direction so as to enable the moving piece and the fixed piece to generate relative displacement;

2. The orthopedic traction device of claim 1, wherein the fixed member and the movable member are cylindrical and are sleeved outside the inner rod;

3. The orthopedic traction device as claimed in claim 2, wherein the fixing member comprises an end surface and a cylindrical side wall, the end surface is perpendicular to the side wall, a first through hole for the inner rod to pass through is formed on the end surface, and the inner surface of the end surface is connected to the elastic member.

4. The orthopedic traction device as claimed in claim 2, wherein a second through hole is opened in the moving member, an abutting portion is provided 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 for abutting against the elastic member.

5. The orthopedic traction device as claimed in claim 2, wherein the buffering device further comprises a tension scale, the tension scale is disposed on an outer surface of the moving member, a tension scale is disposed on the tension scale along a traction direction, the tension scale is set according to a deformation amount and a stiffness coefficient of the elastic member, and a boundary between a side wall surface of the fixed member and a side wall surface of the moving member indicates a scale value to represent traction force.

6. The orthopedic traction device as claimed in claim 1, further comprising a circumferential adjustment scale sleeved on the outer wall surface of the housing, wherein the circumferential adjustment scale is uniformly provided with scales of 0 degree to 360 degrees along the circumferential direction.

7. The orthopedic traction device of claim 6, wherein a locking mechanism is provided on the circumferential adjustment scale for locking the circumferential adjustment scale on the housing;

8. The orthopedic distraction device of claim 1, wherein the inner rod comprises a wire rod portion, the wire rod portion being threadably connected to the housing, the drive portion driving the inner rod to move relative to the housing in the distraction direction.

9. The orthopedic traction device of claim 1, wherein the drive portion is disposed at a distal end of the orthopedic traction device, and the buffer device is disposed between the drive portion and the housing.

10. The orthopedic traction device of any one of claims 1-9, further comprising a traction shoe, wherein the inner rod is connected to the traction shoe and moves the traction shoe;

and/or the elastic 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.