Traction device for wrist joint minimally invasive surgery

Abstract

The utility model relates to the technical field of wrist joint traction devices, in particular to a traction device for wrist joint minimally invasive surgery, which comprises a base, a traction support arranged on the upper portion of the base, a tractor and a hand pressing device, the tractor and the hand pressing device are arranged on one side of the traction support, and the hand pressing device is arranged below the tractor. The hand pressing device is connected into the traction support in a lifting mode through a first lifting assembly, so that a clamping space for fixing the arm of the human body is formed between the hand pressing device and the base. According to the traction device, the arm of a patient is clamped and fixed on the base through the hand pressing device, so that the stability of the wrist joint and the forearm of the patient during traction is improved, a doctor can conveniently examine the wrist joint of the patient and carry out accurate surgical operation, the arm of the patient does not need to be pressed and fixed by additional medical personnel, and the operation is convenient. Therefore, medical workers are liberated, and labor cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wrist joint traction device used in orthopedics minimally invasive surgery, especially wrist joint minimally invasive surgery traction device. BACKGROUND

[0002] Wrist joint is the only joint connecting hand and forearm, which is composed of multiple bones, joint capsule, ligament and muscle. Because of the narrow joint space of wrist joint, traction device is usually used to pull the wrist joint of the patient during the operation, so that the forearm and wrist of the patient are suspended, so that the doctor has enough operation space to observe the structure inside the wrist joint, so that the inspection field of arthroscopy operation and the operation field under the mirror are more clear, which is beneficial to the accurate operation of the doctor.

[0003] But the existing wrist joint traction device generally only hooks the fingers of the patient through the finger sleeve, so that the forearm and wrist of the patient are suspended, and the existing wrist joint traction device cannot fix the elbow and upper arm of the patient. During the preoperative preparation or examination of the wrist joint, additional medical staff is often needed to press the elbow of the patient, which increases the labor cost.

[0004] The utility model is proposed in view of the deficiency of the prior art. UTILITY MODEL CONTENT

[0005] The utility model provides a wrist joint minimally invasive surgery traction device in view of the problem that the existing wrist joint traction device cannot fix the elbow and upper arm of the patient, and additional medical staff is often needed to press the elbow of the patient, which increases the labor cost.

[0006] The utility model adopts the technical scheme that:

[0007] The wrist joint minimally invasive surgery traction device, including base, traction support arranged on the upper portion of base, traction device arranged on one side of traction support and hand presser, hand presser is arranged below traction device, hand presser is connected to traction support through first lifting assembly, so that the clamping space of human arm is formed between hand presser and base.

[0008] The wrist joint minimally invasive surgery traction device, one end of hand presser is equipped with extension connecting rod, first lifting assembly includes connecting sleeve arranged on one end of extension connecting rod, first adjusting rod arranged between traction support and base, limiting structure arranged between connecting sleeve and first adjusting rod, connecting sleeve is sleeved in first adjusting rod, and the hand presser is driven to move close to or away from the base by moving up and down along the first adjusting rod through the connecting sleeve; the limiting structure is used for limiting the up and down movement of the connecting sleeve relative to the first adjusting rod.

[0009] The traction device for wrist joint minimally invasive surgery as described above, the first adjusting rod is provided with a plurality of first adjusting holes, each first adjusting hole is arranged at equal intervals along the height direction of the first adjusting rod, the connecting sleeve is provided with a second adjusting hole corresponding to any first adjusting hole, the limiting structure comprises a first limiting piece, the second adjusting hole is aligned with any first adjusting hole by moving the connecting sleeve up and down relative to the first adjusting rod, and the first limiting piece is arranged between the second adjusting hole and the corresponding first adjusting hole.

[0010] The traction device for wrist joint minimally invasive surgery as described above, the first adjusting hole is arranged in the first adjusting rod along the horizontal direction, the second adjusting hole is arranged in the connecting sleeve along the horizontal direction, and the second adjusting hole is located on one side of the extension connecting rod, the first lifting assembly further comprises a first fixed nut connected with the first limiting piece.

[0011] The traction device for wrist joint minimally invasive surgery as described above, the first lifting assembly further comprises a driving device connected with the first adjusting rod, the limiting structure comprises a first transmission connection part arranged on the first adjusting rod and a second transmission connection part arranged on the connecting sleeve, the first transmission connection part and the second transmission connection part are correspondingly connected, the first adjusting rod is driven to rotate axially by the driving device, the first transmission connection part and the second transmission connection part are driven to transmit, so that the connecting sleeve moves up and down along the first adjusting rod.

[0012] The traction device for wrist joint minimally invasive surgery as described above, the first lifting assembly further comprises a transmission assembly connected between the driving device and the first adjusting rod, the driving device is provided with an output shaft, the transmission assembly comprises a first transmission part fixedly connected with the output shaft and a second transmission part in transmission connection with the first transmission part, the first adjusting rod is fixedly connected with the second transmission part, the first transmission part is provided with a first tooth part, and the second transmission part is provided with a second tooth part matched with the first tooth part.

[0013] The traction device for wrist joint minimally invasive surgery as described above, the hand pressing device is externally provided with a flexible cladding layer.

[0014] The wrist minimally invasive surgery traction device also comprises a second lifting assembly and a second adjusting rod, the second lifting assembly is arranged on the upper part of the traction support, and the second adjusting rod is arranged between the second lifting assembly and the traction device; the second lifting assembly comprises a third adjusting rod arranged on the upper part of the traction support and a second limiting piece, the second adjusting rod is provided with a first through hole matched with the third adjusting rod and a second through hole arranged perpendicularly to the first through hole, the third adjusting rod is provided with a plurality of third adjusting holes arranged at equal intervals in the vertical direction, the second through hole corresponds to any third adjusting hole, the second adjusting rod is moved up and down along the third adjusting rod, the second through hole is aligned with any third adjusting hole, and the second limiting piece is arranged between the second through hole and the corresponding third adjusting hole.

[0015] The wrist minimally invasive surgery traction device, the traction device comprises a traction device main body, a traction chain, the traction device main body comprises a hook arranged on the top, a mounting plate arranged on the bottom, a connecting rod arranged between the hook and the mounting plate, the second adjusting rod is externally provided with a groove matched with the hook, the groove is provided with a plurality of grooves, and the grooves are arranged at intervals along the length direction of the second adjusting rod, a plurality of combination holes arranged at equal intervals are arranged in the mounting plate, the combination hole comprises a limiting hole for fixing the traction chain and a sliding hole for sliding the traction chain, the limiting hole is communicated with the sliding hole, the traction chain is provided with a plurality of limiting balls arranged at equal intervals, a chain segment is formed between any two limiting balls, the limiting ball is limited to pass through the limiting hole, and the traction chain is arranged between the combination holes and forms a finger ring.

[0016] The wrist minimally invasive surgery traction device, the traction support comprises a reversing rod arranged on the upper part of the first adjusting rod, one end of the reversing rod is provided with a universal ball head, the top of the first adjusting rod is provided with a connecting portion, the connecting portion is provided with a rotating cavity capable of accommodating the universal ball head, the universal ball head is rotated in the rotating cavity to drive the traction device to rotate relative to the base, and a second fixing nut is further sleeved at the connecting portion and the reversing rod, and the second fixing nut is used for limiting the rotation of the reversing rod.

[0017] Compared with the prior art, the wrist minimally invasive surgery traction device has the following beneficial effects:

[0018] 1、The traction device fixes the arm of the patient on the base through the hand pressing device, so that the stability of the wrist joint and the forearm of the patient during traction is improved, the doctor can conveniently check the wrist joint of the patient and accurately perform surgical operation, and the arm of the patient does not need to be fixed by additional medical staff, so that the medical staff is liberated and the labor cost is reduced.

[0019] 2. The hand presser can move vertically towards or away from the base via the first lifting component to adjust the size of the clamping space, making it suitable for patients of different heights and weights, thereby improving the flexibility and applicability of the traction device.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is an exploded view of the traction device for minimally invasive wrist joint surgery according to this utility model.

[0022] Figure 2 This is one embodiment of the traction device for minimally invasive wrist joint surgery of this utility model. Figure 1 A schematic diagram under section A-A;

[0023] Figure 3 This is a partial enlarged view of the traction device for minimally invasive wrist joint surgery of this utility model;

[0024] Figure 4 This is another embodiment of the traction device for minimally invasive wrist joint surgery of this utility model. Figure 1 A schematic diagram under section A-A. Detailed Implementation

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] Embodiment 1:

[0029] As Figure 1 The utility model provides a kind of traction device for wrist joint minimally invasive surgery, including base 1, be located in the traction support 2 of base 1 upper portion, be located in the traction device 3 and press hander 4 of traction support 2 side, the traction support 2 vertical setting is in base 1 upper portion, the press hander 4 is located below the traction device 3, i.e., the press hander 4 is located between the traction device 3 and the base 1, the press hander 4 is liftably connected in the traction support 2 by first lifting assembly 5, the first lifting assembly 5 is connected between the traction support 2 and the base 1, and it is used to drive the press hander 4 and move up and down along vertical direction, so that the press hander 4 and the base 1 form the clamping space of fixed human arm between each other.In actual application, patient finger is pulled by the traction device 3, so that the wrist joint and forearm of patient are vertically suspended, at this time, the elbow of patient can be placed on the base 1, and the press hander 4 is above the upper arm of patient, then by adjusting the first lifting assembly 5 to make the press hander 4 move along vertical direction to the direction close to the base 1 and be clamped to the upper arm of patient, at this time, the press hander 4 and the base 1 form the clamping space;When the press hander 4 moves along vertical direction by the first lifting assembly 5 and moves away from the base 1, the press hander 4 is separated from the arm of patient, i.e., the arm of patient can be released.The traction device of this embodiment clamps and fixes the arm of patient on the base 1 by the press hander 4, to facilitate the stability of the wrist joint and forearm of patient when being pulled, facilitate doctor to check the wrist joint of patient and carry out accurate operation, and the arm of patient does not need to be pressed and fixed by additional medical staff, so as to liberate medical staff, reduce labor cost;In addition, the press hander 4 can move along vertical direction by the first lifting assembly 5 and move close to or away from the base 1, to facilitate the size of the clamping space to be adjusted, suitable for patients of different height and weight, so as to improve the flexibility and applicability of the traction device.

[0030] Specifically, as Figure 1As shown in Figure 2, the hand presser 4 has an extension rod 41 at one end. The first lifting assembly 5 includes a connecting sleeve 51 at one end of the extension rod 41, a first adjusting rod 52 between the traction bracket 2 and the base 1, and a limiting structure between the connecting sleeve 51 and the first adjusting rod 52. The hand presser 4 and the connecting sleeve 51 are respectively located at both ends of the extension rod 41. The first adjusting rod 52 is vertically arranged between the traction bracket 2 and the base 1. The connecting sleeve 51 is sleeved in the first adjusting rod 52. The connecting sleeve 51 can move up and down along the first adjusting rod 52 under external force to drive the hand presser to move closer to or away from the base 1. The limiting structure can restrict the up and down movement of the connecting sleeve 51 relative to the first adjusting rod 52 to fix the position of the connecting sleeve 51, thereby fixing the position of the hand presser 4.

[0031] Example 2:

[0032] Example 2, based on Example 1, has the following implementation method for the first lifting component 5 and the limiting structure: Figure 1 As shown, the first adjusting rod 52 has a plurality of first adjusting holes 521, each of which is equally spaced along the height direction of the first adjusting rod 52. The connecting sleeve 51 has a second adjusting hole 511 corresponding to any of the first adjusting holes 521. The limiting structure includes a first limiting member 53. By moving the connecting sleeve 51 up and down relative to the first adjusting rod 52, the second adjusting hole 511 is aligned with any of the first adjusting holes 521. The first limiting member 53 passes through the second adjusting hole 511 and the corresponding first adjusting hole 521. The first adjusting hole 521 is used to position the connecting sleeve 51, thereby fixing the hand presser 4. In this embodiment, the hand presser 4 can be driven by human power and moves up and down along the first adjusting rod 52 through the connecting sleeve 51. The first limiting member 53 can be a limiting bolt, limiting screw, etc. When the second adjusting hole 511 is aligned with any of the first adjusting holes 521, the first limiting member 53 is screwed between the second adjusting hole 511 and the corresponding first adjusting hole 521 to facilitate direct fixing of the hand presser 4. The structure is simple and easy to operate. It should be noted that the height direction of the first adjusting rod 52 is consistent with the vertical direction mentioned above.

[0033] Example 3:

[0034] To enhance the stability of the hand-pressing device 4 when it is fixed, Embodiment 3, based on Embodiment 2, has the following implementation method, such as... Figure 2As shown, the first adjusting hole 521 is vertically arranged in the first adjusting rod 52, and the second adjusting hole 511 is vertically arranged in the connecting sleeve 51. Optionally, the second adjusting hole 511 is located on the upper side or the lower side of the extension connecting rod 41, that is, the second adjusting hole 511 is staggered with the extension connecting rod 41. The first lifting assembly 5 further comprises a first fixed nut 54 which is connected with the first limiting piece 53. The first limiting piece 53 is arranged between the connecting sleeve 51 and the first adjusting rod 52 through the second adjusting hole 511 and the corresponding first adjusting hole 521, and the first fixed nut 54 is connected with the first limiting piece 53 from the side of the first limiting piece 53. The first fixed nut 54 is in contact with the outer wall of the connecting sleeve 51. The connecting sleeve 51 is clamped in the first adjusting rod 52 through the first fixed nut 54 and the first limiting piece 53, which further enhances the stability of the hand press 4. The first fixed nut 54 and the first limiting piece 53 are widely used and have low cost.

[0035] Embodiment 4:

[0036] Embodiment 4 is based on embodiment 1. The first lifting assembly 5 and the limiting structure have another embodiment, as shown in the following. Figure 4 As shown, the first lifting assembly 5 further comprises a driving device 55 which is connected with the first adjusting rod 52. The driving device 55 is arranged between the first adjusting rod 52 and the base 1. The limiting structure comprises a first transmission connection part arranged on the outer wall of the first adjusting rod 52 and a second transmission connection part arranged on the inner wall of the connecting sleeve 51. The first transmission connection part and the second transmission connection part are correspondingly connected. The first adjusting rod 52 is driven to rotate axially by the driving device 55, so that the transmission between the first transmission connection part and the second transmission connection part is generated. Thus, the connecting sleeve 51 is driven to move up and down along the first adjusting rod 52. In addition, when the first adjusting rod 52 stops rotating axially, the connecting sleeve 51 is prevented from moving along the first adjusting rod 52 through the connection between the first transmission connection part and the second transmission connection part. Thus, the connecting sleeve 51 is fixed in the first adjusting rod 52, thereby realizing the fixation of the hand press 4. Optionally, the first adjusting rod 52 can be a lead screw, and the connecting sleeve 51 can be a lead screw nut which is matched with the lead screw, so as to realize the lifting movement of the hand press 4. The lead screw lifting device has simple structure and can be adapted to the traction device.

[0037] Optionally, the drive device 55 may be a small motor adapted to the screw lifting device. The small motor is directly connected to the first adjusting rod 52. The forward and reverse rotation of the drive device 55 controls the forward and reverse rotation of the first adjusting rod 52, thereby realizing the lifting control of the hand press 4. Further optionally, an encoder may be installed in the drive device 55 or the first adjusting rod 52 to cooperate with the electric control system to control the lifting stroke of the connecting sleeve 51, thereby controlling the lifting stroke of the hand press 4.

[0038] Optionally, the first adjusting rod 52 and the driving device 55 are further provided with a mounting bracket connected to the base 1. The first adjusting rod 52 and the driving device 55 are arranged vertically within the mounting bracket. The mounting bracket has a clearance opening or an open end on the side facing the hand presser for the extension connecting rod 41 to pass through and move up and down, so as to increase the stability of the first adjusting rod 52 and isolate the driving device 55 from the external environment to protect the driving device 55. The traction bracket 2 is fixedly installed on the mounting bracket.

[0039] Example 5:

[0040] Example 5, based on Example 4, has the following implementation method, such as... Figure 4 As shown, the first lifting assembly 5 further includes a transmission assembly 57 connected between the driving device 55 and the first adjusting rod 52. The driving device 55 is provided with an output shaft 56. The transmission assembly 57 includes a first transmission member 571 fixedly connected to the output shaft 56 and a second transmission member 572 pulsatorically connected to the first transmission member 571. The first adjusting rod 52 is fixedly connected to the second transmission member 572. The first transmission member 571 is provided with a first toothed portion 5711, and the second transmission member 572 is provided with a second toothed portion 5721 adapted to the first toothed portion 5711. In this embodiment, the drive device 55 can be manual or electric. For example, the manual drive device 55 can be a hand crank drive device, a handwheel drive device, etc., and the electric drive device 55 can be a motor. When the drive device 55 is set as a manual drive device, in order to facilitate operation by medical staff, the manual drive device is generally located on the right side of the base 1. Or when the electric drive device is located on the right side of the base 1, the output shaft 56 of the drive device 55 is perpendicular to the first adjusting rod 52. Therefore, the transmission assembly 57 is set between the drive device 55 and the first adjusting rod 52. The horizontal axial rotation of the output shaft 56 is converted to the vertical axial rotation of the first adjusting rod 52 through the transmission assembly 57, thereby realizing the lifting and lowering movement of the connecting sleeve 51.

[0041] Further, the first transmission member 571 is fixedly connected with the output shaft 56, that is, the first transmission member 571 rotates synchronously with the output shaft 56, the second transmission member 572 is arranged on one side of the first transmission member 571 and fixedly connected with the first adjusting rod 52, the first transmission member 571 and the second transmission member 572 are drivingly connected through the corresponding meshing connection of the first toothed part 5711 and the second toothed part 5721, and the first adjusting rod 52 and the second transmission member 572 rotate synchronously. Optionally, the transmission assembly 57 can adopt a worm gear transmission device, that is, the first transmission member 571 is arranged as a worm, and the second transmission member 572 is arranged as a worm gear; or, the transmission assembly 57 can adopt a bevel gear transmission device, that is, the first transmission member 571 and the second transmission member 572 are arranged as a pair of meshing bevel gears, and the central axis of the first transmission member 571 coincides with the central axis of the output shaft 56, and the central axis of the second transmission member 572 coincides with the central axis of the first adjusting rod 52. Optionally, a shaft coupling can be arranged between the first adjusting rod 52 and the second transmission member 572.

[0042] Embodiment 6:

[0043] On the basis of any of the above embodiments, the wrist joint minimally invasive surgery traction device has the following implementation manners, as shown in the drawings: Figure 4 The hand presser 4 is externally provided with a flexible cladding layer 42 to improve the comfort of the patient. Optionally, the flexible cladding layer 42 can be made of one or more of leather, sponge, silica gel, TPE (thermoplastic elastomer), polyurethane, and rubber.

[0044] Further optionally, in order to reduce the weight of the hand presser 4, the extension connecting rod 41 can extend in the horizontal direction, and the flexible cladding layer 42 is arranged outside the extension connecting rod 41, so as to simplify the structure of the hand presser 4, reduce the cost, and increase the structural strength of the hand presser 4. In actual application, the hand presser 4 can be moved downward along the first adjusting rod 52 through the first lifting assembly 5 to reduce the clamping space, so as to fix the arm of the patient.

[0045] Embodiment 7:

[0046] On the basis of any of the above embodiments, the wrist joint minimally invasive surgery traction device has the following implementation manners, as shown in the drawings: Figure 1 The wrist joint minimally invasive surgery traction device further comprises a second lifting assembly 6 and a second adjusting rod 7, the second lifting assembly 6 is arranged on the upper part of the traction support 2, the second adjusting rod 7 is arranged between the second lifting assembly 6 and the tractor 3, and the tractor 3 is detachably suspended on the second adjusting rod 7.

[0047] Specifically, the second lifting assembly 6 includes a third adjusting rod 61 disposed on the upper part of the traction bracket 2 and a second limiting member 62. The third adjusting rod 61 is vertically disposed on the upper part of the traction bracket 2. The second adjusting rod 61 has a first through hole 71 adapted to the third adjusting rod 61 and a second through hole 72 disposed perpendicular to the first through hole 71. During assembly, the second adjusting rod 61 is sleeved on the third adjusting rod 61 through the first through hole 71. The second through hole 72 is connected to the first through hole 71 and extends in a direction away from the first through hole 71. The rod 61 is provided with a plurality of third adjustment holes 611 equally spaced along the vertical direction. The second through hole 72 corresponds to any of the third adjustment holes 611. The second adjustment rod 7 can be manually driven to move up and down along the third adjustment rod 61, so that the second through hole 72 is aligned with any of the third adjustment holes 611. The second limiting member 62 passes between the second through hole 72 and the corresponding third adjustment hole 611 to position the second adjustment rod 7, thereby fixing the position of the traction device 3. Optionally, the second limiting member 62 can be a limiting bolt, a limiting screw, etc. The second lifting assembly 6 drives the second adjustment rod 7 to move up and down along the third adjustment rod 61, thereby driving the traction device 3 to move up and down along the third adjustment rod 61. This allows the height of the traction device 3 to be adjusted according to the length of the patient's forearm, thereby better achieving traction fixation of the patient's wrist joint and improving the flexibility and applicability of the traction device.

[0048] Optionally, the specific structure of the second lifting component 6 is similar to that of the first lifting component 5 in Embodiment 2, which helps to simplify the specific structure of the traction device, reduce costs, and facilitate operation by medical staff.

[0049] Example 8:

[0050] Example 8, based on Example 7, has the following implementation method, such as... Figure 3 As shown, the traction device 3 includes a traction device body 31 and a traction chain 32. The traction device body 31 includes a hook 311 at the top, a mounting plate 312 at the bottom, and a connecting rod 313 between the hook 311 and the mounting plate 312. The connecting rod 313 is vertically mounted on the mounting plate 312, and the hook 311 is located at the top of the connecting rod 313. The traction device body 31 is suspended from the second adjusting rod 7 by the hook 311.

[0051] The second adjusting rod 7 is externally provided with grooves 73 matched with the hooks 311. The grooves 73 are provided in plurality and are arranged at intervals along the length direction of the second adjusting rod 7. The grooves 73 are used for positioning the hooks 311 and avoiding the hooks 311 from easily sliding on the second adjusting rod 7, so as to improve the suspension stability of the traction device main body 31 and the traction stability of the wrist joint of the patient. In addition, as shown in Figure 3 the grooves 73 are provided in plurality, the suspension positions of the hooks 311 can be adjusted, so as to adjust the distance between the traction device main body 31 and the traction support 2. Optionally, the grooves 73 are annular grooves 73.

[0052] The mounting plate 312 is internally provided with limiting holes 3121 for fixing the traction chain 32 and sliding holes 3122 for allowing the traction chain 32 to slide. The limiting holes 3121 are communicated with the sliding holes 3122. The traction chain 32 is provided with limiting balls 321 arranged at intervals in plurality. Chain segments 322 are formed between any two limiting balls 321. The limiting balls 321 are limited to pass through the limiting holes 3121. The traction chain 32 is arranged around the mounting plate 312 and the adjusting rod and forms a finger ring. Optionally, as shown in Figure 3 , Figure 3 a use schematic view of the traction chain 32 is shown. The limiting holes 3121 can be strip-shaped holes. The limiting holes 3121 can allow the chain segments 322 to pass through. The inner diameter size of the limiting holes 3121 is smaller than the outer diameter size of the limiting balls 321. The sliding holes 3122 can be circular holes. The inner diameter size of the sliding holes 3122 is matched with the outer diameter size of the limiting balls 321. The sliding holes 3122 can allow the limiting balls 321 to pass through. The limiting holes 3121 extend from one side wall of the mounting plate 312 along the width direction of the mounting plate 312. The sliding holes 3122 are arranged in the extension direction of the limiting holes 3121 and are communicated with the limiting holes 3121. The combined holes formed by the limiting holes 3121 and the sliding holes 3122 are provided in plurality and are arranged at intervals along the length direction of the mounting plate 312. One end of each limiting hole 3121 is an open end, so as to facilitate the traction chain 32 to enter the limiting holes 3121. In use, the traction chain 32 is arranged around each combined hole and forms a finger ring capable of suspending the fingers of the patient, so as to realize the traction on the wrist joint of the patient. Further, the traction chain 32 can also be arranged in the grooves 73 of the second adjusting rod 7, so as to enhance the suspension stability of the traction chain 32. The length of the traction chain 32 can be flexibly adjusted, so as to further enhance the use flexibility of the traction device, make the traction device adapt to different patients, and facilitate the traction chain 32 to be disassembled and assembled, so as to facilitate the medical staff to store the traction device.

[0053] Embodiment 9:

[0054] In order to further enhance the flexibility of the traction device, embodiment 9 is based on any of the above embodiments, and has the following implementation, as shown in Figure 2 and Figure 4 The reversing rod 21 is provided on the upper part of the first adjusting rod 52, one end of the reversing rod 21 is provided with a universal ball head 211, the top of the first adjusting rod 52 is provided with a connecting part 522, the connecting part 522 is provided with a rotating cavity 523 capable of accommodating the universal ball head 211, the universal ball head 211 rotates in the rotating cavity 523 to drive the tractor 3 to rotate relative to the base 1; the connecting part 522 and the connecting part of the reversing rod 21 are also provided with a second fixing nut 22, which is used to limit the rotation of the reversing rod 21. In this embodiment, the connecting part 522 and the first adjusting rod 52 can be an integral structure or a split structure, as long as the rotating cavity 523 is provided in the connecting part 522 and opens towards the reversing rod 21, the universal ball head 211 of the reversing rod 21 is rotatably arranged in the rotating cavity 523, the reversing rod 21 can be axially rotated through the universal ball head 211, the second fixing nut 22 is sleeved outside the connecting part 522 and the connecting part of the universal ball head 211, and the outer wall of the connecting part 522 is provided with an outer thread matched with the second fixing nut 22, the second fixing nut 22 is provided with a top cover 221, the top cover 221 is provided with a through hole through which the top of the universal ball head 211 passes, the inner diameter of the through hole is greater than the outer diameter of the rod body of the reversing rod 21, and the inner diameter of the through hole is less than the maximum outer diameter of the universal ball head 211, the universal ball head 211 is between the top cover 221 and the connecting part 522, the clamping degree of the top cover 221 of the second fixing nut 22 to the universal ball head 211 is adjusted by the tightness of the thread cooperation between the second fixing nut 22 and the connecting part 522, that is, when the cooperation between the second fixing nut 22 and the connecting part 522 is loose, the reversing rod 21 can be axially rotated through the universal ball head 211 to drive the tractor 3 to rotate; when the cooperation between the second fixing nut 22 and the connecting part 522 is tight, the universal ball head 211 is clamped by the top cover 221 and the connecting part 522 to limit the rotation of the reversing rod 21, thereby fixing the reversing rod 21; thereby realizing multi-angle adjustment of the traction device and improving the flexibility and applicability of the traction device.

[0055] Embodiment 10:

[0056] The difference between the embodiment 10 and the embodiment 9 is that the first adjusting rod 52 is a screw rod, the connecting sleeve 51 is a screw nut, the connecting part 522 is detachably connected to the top of the first adjusting rod 52, the connecting part 522 is internally provided with a mounting cavity for mounting the first adjusting rod 52, and a bearing is arranged between the connecting part 522 and the first adjusting rod 52 to ensure normal rotation of the first adjusting rod 52.

[0057] The above is only to further illustrate the technical content of the present application by way of examples, so that the reader can more easily understand, but does not represent that the embodiments of the present application are limited to this, any technical extension or re-creation made according to the present application is protected by the present application. The protection scope of the present application is subject to the claims.

Claims

1. A traction device for minimally invasive surgery of the wrist joint, characterized in that, The utility model relates to a hand pressing device, including base (1), be located the traction support (2) of upper portion of base (1), be located the tractor (3) of one side of traction support (2) and press hand ware (4), press hand ware (4) is located tractor (3) below, press hand ware (4) is liftablely connected in traction support (2) through first lifting assembly (5), make the clamping space of fixed human body arm between press hand ware (4) and base (1).

2. The wrist distraction device for minimally invasive surgery of claim 1, wherein, One end of the press hand ware (4) is provided with an extension connecting rod (41), the first lifting assembly (5) includes a connecting sleeve (51) provided at one end of the extension connecting rod (41), a first adjusting rod (52) provided between the traction support (2) and the base (1), a limiting structure provided between the connecting sleeve (51) and the first adjusting rod (52), the connecting sleeve (51) is sleeved in the first adjusting rod (52), and the connecting sleeve (51) is moved up and down along the first adjusting rod (52) to drive the press hand ware (4) to move close to or away from the base (1); the limiting structure is used for limiting the up and down movement of the connecting sleeve (51) relative to the first adjusting rod (52).

3. The wrist distraction device for minimally invasive surgery of claim 2, wherein, A plurality of first adjusting holes (521) are provided in the first adjusting rod (52), each first adjusting hole (521) is arranged at equal intervals along the height direction of the first adjusting rod (52), a second adjusting hole (511) corresponding to any first adjusting hole (521) is provided in the connecting sleeve (51), the limiting structure includes a first limiting piece (53), the second adjusting hole (511) is aligned with any first adjusting hole (521) by moving the connecting sleeve (51) up and down relative to the first adjusting rod (52), and the first limiting piece (53) is arranged between the second adjusting hole (511) and the corresponding first adjusting hole (521).

4. The wrist distraction device for minimally invasive surgery of claim 3, wherein, The first adjusting hole (521) is provided in the first adjusting rod (52) along the horizontal direction, the second adjusting hole (511) is provided in the connecting sleeve (51) along the horizontal direction, and the second adjusting hole (511) is located on one side of the extension connecting rod (41), the first lifting assembly (5) further includes a first fixed nut (54) connected with the first limiting piece (53).

5. The wrist distraction device for minimally invasive surgery of claim 2, wherein, The first lifting assembly (5) further includes a driving device (55) connected with the first adjusting rod (52), the limiting structure includes a first transmission connection part provided on the first adjusting rod (52) and a second transmission connection part provided on the connecting sleeve (51), the first transmission connection part and the second transmission connection part are correspondingly connected, the first adjusting rod (52) is driven to rotate axially by the driving device (55), a transmission is generated between the first transmission connection part and the second transmission connection part, so that the connecting sleeve (51) is moved up and down along the first adjusting rod (52).

6. The wrist distraction device for minimally invasive surgery of claim 5, wherein, The first lifting assembly (5) further comprises a transmission assembly (57) connected between the driving device (55) and the first adjusting rod (52), the driving device (55) is provided with an output shaft (56), the transmission assembly (57) comprises a first transmission part (571) fixedly connected with the output shaft (56), a second transmission part (572) in transmission connection with the first transmission part (571), and the first adjusting rod (52) is fixedly connected with the second transmission part (572), the first transmission part (571) is provided with a first tooth part (5711), and the second transmission part (572) is provided with a second tooth part (5721) matched with the first tooth part (5711).

7. The wrist distraction device of any one of claims 1-6, wherein, The hand presser (4) is externally provided with a flexible cladding layer (42).

8. The wrist distraction device of any one of claims 1-6, wherein, Further comprising a second lifting assembly (6) and a second adjusting rod (7), the second lifting assembly (6) is arranged on the upper portion of the traction support (2), and the second adjusting rod (7) is arranged between the second lifting assembly (6) and the tractor (3); The second lifting assembly (6) comprises a third adjusting rod (61) arranged on the upper portion of the traction support (2) and a second limiting part (62), the second adjusting rod (7) is provided with a first through hole (71) matched with the third adjusting rod (61) and a second through hole (72) arranged perpendicularly to the first through hole (71), the third adjusting rod (61) is provided with a plurality of third adjusting holes (611) arranged at equal intervals in the vertical direction, the second through hole (72) corresponds to any third adjusting hole (611), the second through hole (72) is aligned with any third adjusting hole (611) by moving the second adjusting rod (7) up and down along the third adjusting rod (61), and the second limiting part (62) is arranged between the second through hole (72) and the corresponding third adjusting hole (611).

9. The wrist distraction device for minimally invasive surgery of claim 8, wherein, The tractor (3) comprises a tractor main body (31) and a traction chain (32), the tractor main body (31) comprises a hook (311) arranged on the top portion, a mounting plate (312) arranged on the bottom portion, and a connecting rod (313) arranged between the hook (311) and the mounting plate (312), the second adjusting rod (7) is externally provided with a groove (73) matched with the hook (311), the groove (73) is provided with a plurality of grooves (73) arranged at intervals along the length direction of the second adjusting rod (7), and the mounting plate (312) is provided with a plurality of combination holes arranged at equal intervals, the combination holes comprise limiting holes (3121) for fixing the traction chain (32) and sliding holes (3122) for sliding the traction chain (32), and the limiting holes (3121) and the sliding holes (3122) are in communication. The traction chain (32) is provided with a plurality of equally spaced limiting balls (321), any two of which form a chain segment (322), the limiting ball (321) is limited to pass through the limiting hole (3121), and the traction chain (32) is arranged between each combination hole and forms a finger ring.

10. The wrist distraction device of any one of claims 2-6, wherein, The traction support (2) includes a reversing rod (21) arranged on the upper part of the first adjusting rod (52), one end of the reversing rod (21) is provided with a universal ball head (211), the top of the first adjusting rod (52) is provided with a connecting part (522), the connecting part (522) is provided with a rotating cavity (523) capable of accommodating the universal ball head (211), and the universal ball head (211) is rotated in the rotating cavity (523) to drive the tractor (3) to rotate relative to the base (1). The connecting part (522) and the connecting part of the reversing rod (21) are further sleeved with a second fixed nut (22), and the second fixed nut (22) is used to limit the rotation of the reversing rod (21).

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