CN113855451B

CN113855451B - A multifunctional surgical device for trauma orthopedics

Info

Publication number: CN113855451B
Application number: CN202111066421.0A
Authority: CN
Inventors: 张鹏达
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2025-06-13
Anticipated expiration: 2041-09-13
Also published as: CN113855451A

Abstract

The present invention relates to the technical field of orthopedic surgical equipment, and discloses a multifunctional surgical equipment for trauma orthopedics, including an operating bed assembly, wherein the operating bed assembly includes a bed base, the bottom of the bed base is provided with universal walking wheels, the top of the bed base is fixedly connected with a lifting column, the top of the lifting column is fixedly connected with a keel frame, the top of the keel frame is installed with a bed board, and the keel frame and the bed board are both made of carbon fiber material; the new material operating bed eliminates the obstruction of the metal keel during the intraoperative fluoroscopy of the existing operating bed, so that the fluoroscopy effect is clearer and is suitable for placing various surgical positions, the new material greatly reduces the heavy burden brought by traditional steel materials, and further reduces the labor intensity of medical staff, and can indirectly assist or prevent excessive traction caused by traditional traction arms due to insufficient technical experience of doctors, resulting in simple resetting becoming complicated.

Description

Wound orthopedics multifunctional operation equipment

Technical Field

The invention relates to the technical field of orthopedic operation equipment, in particular to trauma orthopedic multifunctional operation equipment.

Background

In the wound orthopaedics treatment, sometimes, the injured part of a patient needs to be subjected to operation treatment, the recovery of the patient is helped, the lower limb operation is the clinical common operation of orthopaedics, the closed reduction intramedullary fixation technology is widely applied, the closed reduction is carried out on the premise that the fracture needs to be reduced to an ideal position before the operation, the good reduction state is maintained, and the cooperation of an operation traction bed is needed.

The traction is based on the principle of acting force and reaction force in mechanics, and is used for the affected limb to relieve tension and retraction of soft tissues at fracture and dislocation positions, so that the fracture or dislocation is reset, the purpose of treatment is achieved, and the traction is divided into two major categories, namely continuous leather traction and bone traction, and is mainly used for the lower limb orthopedic operation.

The prior operation bed has shielding in perspective angle, heavy bed board and fatigue in disassembly of traction frame after operation is completed, the prior perspective bed is not detachable and can not be put in special position,

The traditional traction equipment needs manual assembly, most of traction frames on the market are not flexible enough in joints, are unreasonable in design and can only be used for operation, in addition, collision can be generated under many conditions of the traction frames and the CB machine in perspective, and meanwhile, the traction frames of the inner sleeve and the outer sleeve are very large in friction force and are laborious when the traditional traction frames are pulled, so that some operations are limited.

Disclosure of Invention

(One) solving the technical problems

Aiming at the defects of the prior art, the invention provides the multifunctional surgical equipment for the traumatic orthopaedics, which has the advantages of eliminating the shielding of perspective images, being convenient and practical, solving the problem that the perspective angle of an operating table is shielded, simultaneously solving the problem of heavy weight of a traditional bed board, solving the defects that the traditional perspective table is not detachable and can not be placed in a special position, solving the defects that the traditional traction equipment needs manual assembly, the collision can be generated when the perspective is carried out, influencing the surgical quality and the friction force of an inner sleeve traction frame and an outer sleeve traction frame is very large when the traction frame is pulled, being more laborious, being unreasonable in design and easily causing excessive pulling, solving the problem that the joints of all parts on the traditional traction frame are inflexible, discarding the traditional frame and inflexible joints, directly saving the consumption of the surgical time and reducing the occurrence of unnecessary surgical risks.

(II) technical scheme

The technical scheme is that the multifunctional surgical equipment for trauma orthopaedics comprises an operation bed component and a traction base component, wherein the operation bed component comprises a bed base, the bottom of the bed base is provided with universal traveling wheels, the top of the bed base is fixedly connected with a lifting column, the top of the lifting column is fixedly connected with a keel frame, the top of the keel frame is provided with a bed board, the keel frame and the bed board are both made of carbon fiber materials, and the bottom of the bed base is provided with a bed body balancing weight;

the traction base assembly is arranged on one side of the operating table assembly and comprises a traction base, a hydraulic cylinder is arranged in the traction base, a handle is arranged at the top of the traction base, a drawer is connected in the traction base in a sliding mode, a balancing weight I is fixedly connected in the traction base, a foot pad and a balancing weight II with the same height are fixedly connected at the bottom of the traction base, and a lifting universal wheel and a transverse sliding small lifting wheel which are symmetrically arranged are arranged at the bottom of the traction base;

the telescopic end of the hydraulic cylinder is slidably connected with a parallel frame assembly, the parallel frame assembly comprises a sliding rail frame, the bottom of the sliding rail frame is fixedly connected with a rack and a driving box, and one side of the sliding rail frame is fixedly connected with a handle;

The traction assembly comprises an arc-shaped track, wherein the arc-shaped track is rotationally connected with the sliding rail frame, limiting blocks are fixedly connected to two ends of the outer side wall of the arc-shaped track, a sliding block is slidably connected to the outer side wall of the arc-shaped track, one side of the sliding block is connected with a tension meter through a universal joint, and one end of the tension meter is movably connected with a foot rest assembly;

The foot rest assembly comprises a rotary connecting seat, a swinging connecting piece is arranged at one end of the rotary connecting seat, and a foot rest body is movably connected to one end of the swinging connecting piece.

Preferably, the bed board comprises a head board, a back board I, a waist board, a back board II and leg boards.

Preferably, one side of the waist plate is connected with a perineum column plate, and the top of the perineum column plate is fixedly connected with a perineum column.

Preferably, the lifting universal wheels are provided with five groups, the five groups of lifting universal wheels are uniformly distributed at the bottom of the traction base, the lifting universal wheels consist of lifting parts and wheel bodies, the four transverse sliding small lifting wheels are uniformly distributed at the bottom of the balancing weight II, and the transverse sliding small lifting wheels consist of lifting parts and wheel bodies.

Preferably, a driving gear is arranged in the driving box, the driving gear is meshed with the rack, a worm gear is meshed with the outer side wall of the driving gear, and a hand wheel is fixedly connected with a central shaft of the worm gear.

Preferably, a fixing bolt is fixedly connected inside the sliding block.

Preferably, a universal joint is arranged at the joint of the sliding block and the tension meter.

Preferably, the traction base assembly is provided with a storage battery, a hydraulic lifting button, a lifting universal wheel button and a transverse sliding small lifting wheel button, the storage battery can be charged, the hydraulic lifting button is used for controlling the hydraulic cylinder, the lifting universal wheel button is used for controlling the lifting universal wheel, and the transverse sliding small lifting wheel button is used for controlling the transverse sliding small lifting wheel.

Preferably, one side joint of perineum post board has supporting component, supporting component includes articulated pole, articulated pole's lateral wall is equipped with rotatory loop bar, rotatory loop bar's one end joint has drive division, drive division includes the drive seat, one side rotation of drive seat is connected with the lifting hand wheel, the one end fixedly connected with gear of lifting hand wheel, the lateral wall meshing of gear has the pinion rack, the inside wall transmission of drive division is connected with the bracing piece, the pinion rack is fixed on the lateral wall of bracing piece, the top of bracing piece is equipped with the supporting seat, the supporting seat with the junction of bracing piece is equipped with the universal seat.

(III) beneficial effects

Compared with the prior art, the invention provides the multifunctional surgical equipment for the traumatic orthopaedics, which has the following beneficial effects:

1) The novel material operating table eliminates the shielding of the metal keels in the perspective process in the operation of the existing operating table, so that the perspective influence is clearer, the novel material is suitable for placing various surgical positions, the heavy burden brought by the traditional steel materials is greatly reduced, and the labor intensity of medical staff is further reduced.

2) The novel material bed board can obviously reduce the perspective times of the cb machine in operation, thereby reducing the ray exposure damage of perspective rays to operators and patients.

3) The traction equipment eliminates perspective image angle shielding caused by the traditional traction arm and unnecessary collision caused by the cb machine and the traditional traction frame.

4) Over-traction due to insufficient technical experience of the doctor, which is brought about by the conventional trailing arm, can be indirectly assisted or prevented, resulting in simple resetting being complicated.

5) The device can be driven to draw according to the physiological direction of a human body more simply, the physiological direction is intangibly complied in both the adduction process and the abduction process, and the situation of excessive traction in the adduction process is avoided, so that good reset disappears, the experience is insufficient or the experience is rich, the doctor is free from worry, and the hidden trouble in the traditional traction frame is eliminated.

6) The device can be regulated to reset by lifting the hydraulic cylinder, and the normal forward inclination angle which tends to be dissected is achieved by lifting the hydraulic cylinder because the fracture caused by injury is angled forwards or backwards.

7) The device is suitable for various operation patients, has more advantages for special patients, for example, partial patients with short lower limbs and disabled people, and can not cause the situation that the traction arm is too long and the legs are barely arranged on a traction frame or cannot be drawn.

8) The tension meter is arranged on the device, so that the force statistics of various fracture types and the proportion of men and women in the actual traction process can be performed through big data, the accurate medical treatment can be performed on the operation, the situation that the doctor experience is insufficient to directly pull the fracture excessively is prevented, the simple operation is complicated, the unnecessary operation time is prolonged, and the operation risk of a patient is increased.

9) The device is not required to be assembled and disassembled, is simple and convenient to operate, can not generate various non-optimal design problems caused by various traction frames with hinged inner and outer arms, can be used for preparing operation resetting after being pushed, and brings very convenient operation modes for doctors.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the perineum plate according to the present invention;

FIG. 3 is a top view of the perineum plate of the present invention;

FIG. 4 is a schematic view of the traction apparatus of the present invention;

FIG. 5 is a schematic bottom view of the traction device of the present invention;

FIG. 6 is a schematic view of a portion of the structure of the parallel frame assembly of the present invention;

FIG. 7 is a schematic view of the structure of the draft assembly and the foot rest assembly of the present invention;

FIG. 8 is an enlarged view of FIG. 7 at A in accordance with the present invention;

FIG. 9 is a schematic view of a support assembly according to the present invention;

fig. 10 is a schematic structural view of a transmission part in the support assembly according to the present invention.

10 Parts of an operating table assembly, 11 parts of a bed base, 12 parts of a universal walking wheel, 13 parts of a lifting column, 14 parts of a keel frame, 15 parts of a bed board, 151 parts of a head board, 152 parts of a back board, 153 parts of a waist board, 154 parts of a back board, 155 parts of a leg board, 156 parts of a perineum column board, 1561 parts of a perineum column, 16 parts of a bed body balancing weight;

20. The traction base assembly, the traction base, the hydraulic cylinder, the handle, the drawer, the counterweight I, the foot pad, the counterweight II, the lifting universal wheel and the small transverse sliding lifting wheel are respectively arranged on the traction base assembly, the traction base, the hydraulic cylinder, the handle, the drawer, the counterweight I, the foot pad, the counterweight II and the lifting universal wheel;

30. The parallel frame assembly, 31, a slide rail frame, 32, a rack, 33, a driving box, 331, a driving gear, 332, a worm gear, 333, a hand wheel, 34 and a handle;

40. The traction assembly comprises a traction assembly, 41, an arc-shaped track, 42, a limiting block, 43, a sliding block, 431, a fixed bolt, 44 and a tension meter;

50. a foot rest assembly; 51, a rotary connecting seat, 52, a swinging connecting piece, 53, a foot rest body;

60. The device comprises a supporting component, a hinging rod, a 62, a transmission part, a 621, a transmission seat, a 622, a lifting hand wheel, a 623, a gear, a 624, a toothed plate, a 63, a supporting rod, a 64, a supporting seat, a 65, a universal seat, a 66 and a rotary sleeve rod.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

The utility model provides a multi-functional operation equipment of wound orthopedics, including operation table subassembly 10 and traction base subassembly 20, operation table subassembly 10 includes bed base 11, the bottom of bed base 11 is equipped with universal walking wheel 12, the top fixedly connected with lift post 13 of bed base 11, the top fixedly connected with fossil fragments frame 14 of lift post 13, bed board 15 is installed at the top of fossil fragments frame 14, fossil fragments frame 14 and bed board 15 all adopt carbon fiber material, the bottom of bed base 11 is equipped with bed body balancing weight 16, through setting up bed body balancing weight 16, the difficult emergence of bed body is removed when drawing;

the traction base assembly 20 is arranged on one side of the operating table assembly 10, the traction base assembly 20 comprises a traction base 21, a hydraulic cylinder 22 is arranged in the traction base 21, a handle 23 is arranged at the top of the traction base 21, a drawer 24 is connected in the traction base 21 in a sliding manner, a balancing weight I25 is fixedly connected in the traction base 21, a foot pad 26 and a balancing weight II 27 with the same height are fixedly connected at the bottom of the traction base 21, and a lifting universal wheel 28 and a transverse sliding small lifting wheel 29 which are symmetrically arranged are arranged at the bottom of the traction base 21;

The telescopic end of the hydraulic cylinder 22 is slidably connected with a parallel frame assembly 30, the parallel frame assembly 30 comprises a slide rail frame 31, the bottom of the slide rail frame 31 is fixedly connected with a rack 32 and a driving box 33, and one side of the slide rail frame 31 is fixedly connected with a handle 34;

the traction assembly 40 is installed at one end of the sliding rail frame 31, the traction assembly 40 comprises an arc-shaped rail 41, the arc-shaped rail 41 is rotationally connected with the sliding rail frame 31, limiting blocks 42 are fixedly connected to two ends of the outer side wall of the arc-shaped rail 41, a sliding block 43 is slidably connected to the outer side wall of the arc-shaped rail 41, a tension meter 44 is connected to one side of the sliding block 43 through a universal joint, and a foot rest assembly 50 is movably connected to one end of the tension meter 44;

The foot rest assembly 50 comprises a rotary connecting seat 51, a swinging connecting piece 52 is installed at one end of the rotary connecting seat 51, and a foot rest body 53 is movably connected to one end of the swinging connecting piece 52.

In this embodiment, the bed board 15 includes a head board 151, a back board 152, a waist board 153, a back board 154 and a leg board 155.

In this embodiment, specifically, a perineum pole plate 156 is connected to one side of the waist plate 153, and a perineum pole 1561 is fixedly connected to the top of the perineum pole plate 156.

In this embodiment, specifically, five groups of lifting universal wheels 28 are provided, the five groups of lifting universal wheels 28 are uniformly distributed at the bottom of the traction base 21, the lifting universal wheels 28 are composed of lifting parts and wheel bodies, four transverse sliding small lifting wheels 29 are provided, four transverse sliding small lifting wheels 29 are uniformly distributed at the bottom of the balancing weights two 27, and the transverse sliding small lifting wheels 29 are composed of lifting parts and wheel bodies.

In this embodiment, specifically, a driving gear 331 is disposed in the driving box 33, the driving gear 331 is engaged with the rack 32, a worm gear 332 is engaged with an outer sidewall of the driving gear 331, and a central shaft of the worm gear 332 is fixedly connected with a hand wheel 333.

In this embodiment, specifically, the fixing bolt 431 is fixedly connected to the inside of the slider 43.

In this embodiment, specifically, a universal joint is provided at the connection between the slider 43 and the tension meter 44.

In this embodiment, specifically, the traction base assembly 20 is provided with a storage battery, a hydraulic lifting button, a lifting universal wheel button and a transverse sliding small lifting wheel button, wherein the storage battery can be charged, the hydraulic lifting button is used for controlling the hydraulic cylinder 22, the lifting universal wheel button is used for controlling the lifting universal wheel 28, and the transverse sliding small lifting wheel button is used for controlling the transverse sliding small lifting wheel 29.

Referring to fig. 1 to 10, when in use, the universal travelling wheels 12 extend out of the bed base 11, so that the whole bed body can move in any direction, the bed body is moved to a proper position, the height of the lifting column 13 is adjusted, the bed body reaches a proper height, finally, the leg plate 154 or the perineum column plate 155 is selected to be replaced according to the operation condition of a patient, and when in operation, the whole bed body can be seen through due to the fact that the bed plate and the keel frame 14 are made of carbon fiber materials;

When bone traction is carried out, the perineum pole plate 156 is inserted into the waist plate 153, then the lifting wheel 28 extends out of the traction base 21 through the lifting wheel button, so that the whole traction equipment can move, after the whole traction equipment is moved to an operation area, the lifting wheel 28 is retracted through the lifting wheel button, so that the balancing weight I25 and the balancing weight II 27 are in contact with the ground, and the whole traction equipment is not easy to move; the method comprises the steps of rotating a fixed bolt to unlock an arc track to a horizontal position to lock the rotating fixed bolt, lifting the traction device to the same height of an operation bed through a hydraulic lifting button, simultaneously connecting a foot rest body 53 on the traction device with a foot of a patient, adjusting a swinging part 52 to enable the foot to be attached to the foot rest body, unlocking a lifting universal wheel 28 to enable the device to slide after the connection is completed, pulling a handle 23 or a handle 34 to enable the leg of the patient to pull, retract or extend outwards through pulling the device or the handle 34, achieving the purposes of pulling, retracting and extending, locking the lifting universal wheel 28 to enable the fracture to be approximately reset, unlocking and locking a transverse sliding small lifting wheel 29 to enable the fracture to be further reset through a transverse sliding small lifting wheel button according to the reset condition, unlocking and locking a fixed bolt 431 to enable the sliding slider 41 to slide along the arc track 41 to enable the sliding slider 43 to conduct trace retraction and extension actions to enable the fracture to be further reset, unlocking a worm wheel 51 to enable the worm wheel to enable the leg of the patient to rotate inwards or outwards rotate a worm wheel to enable the worm wheel to be further reset, driving a worm gear 332 to rotate the worm wheel to be 333 according to the reset condition, driving the worm gear 332 to rotate the worm wheel to be further reset, the driving gear 331 drives the rack 32 to transversely move, the sliding rail frame 31 on the rack 32 can transversely move along with the rack 32 to carry out small-amplitude traction and scaling operation, the whole device can realize self-locking braking when transversely moving due to the structure of the worm gear 332, the sliding rail frame 31 can only move through the hand wheel 333 and cannot automatically move along with the rack, meanwhile, whether the fracture part of a patient is supported by the supporting component 60 or not is considered according to the resetting condition, the fracture is further reset, in addition, the universal joint is arranged on the traction component 40, feet on the foot rest body 52 can rotate during traction, the legs of a human body can conform to the physiological direction no matter the direction of traction equipment, and in addition, the tension gauge 44 arranged on the traction component 40 can detect the traction force, so that the observation of medical staff is convenient.

Example two

One side joint of perineum post plate 156 has supporting component 60, supporting component 60 includes articulated pole 61, the lateral wall of articulated pole 61 is equipped with rotatory loop bar 66, the one end joint of rotatory loop bar 66 has drive division 62, drive division 62 includes drive seat 621, one side rotation of drive division 621 is connected with lifting hand wheel 622, the one end fixedly connected with gear 623 of lifting hand wheel 622, the lateral wall meshing of gear 623 has pinion rack 624, the inside wall transmission of drive division 62 is connected with bracing piece 63, pinion rack 624 is fixed on the lateral wall of bracing piece 63, the top of bracing piece 63 is equipped with supporting seat 64, the junction of supporting seat 64 and bracing piece 63 is equipped with universal seat 65.

Referring to fig. 1-9, by inserting the support assembly 60 into the keel on the perineum pole plate 156, the support assembly 60 supports the leg of the person, and by adjusting the hinge rod 61, the angle of the support seat 64 can be adjusted, by rotating the lifting hand wheel 622, the lifting hand wheel 622 drives the gear 623 to rotate, the gear 623 then drives the toothed plate 624 to rise or fall, the support rod 63 on the toothed plate 624 drives the support seat 64 to rise or fall, so that the height adjustment of the support seat 64 is realized, and the auxiliary reduction of the fracture end by the operator is facilitated.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The multifunctional surgical equipment for the orthopaedics department comprises an operation bed assembly (10) and a traction base assembly (20), and is characterized in that the operation bed assembly (10) comprises a bed base (11), a universal travelling wheel (12) is arranged at the bottom of the bed base (11), a lifting column (13) is fixedly connected to the top of the bed base (11), a keel frame (14) is fixedly connected to the top of the lifting column (13), a bed plate (15) is arranged at the top of the keel frame (14), the keel frame (14) and the bed plate (15) are made of carbon fiber materials, a bed body balancing weight (16) is arranged at the bottom of the bed base (11), and the bed plate (15) comprises a head plate (151), a back plate I (152), a waist plate (153), a back plate II (154) and leg plates (155);

The traction base assembly (20) is arranged on one side of the operating table assembly (10), the traction base assembly (20) comprises a traction base (21), a hydraulic cylinder (22) is arranged in the traction base (21), a handle (23) is arranged at the top of the traction base (21), a drawer (24) is connected in the traction base (21) in a sliding mode, a balancing weight I (25) is fixedly connected in the traction base (21), a foot pad (26) and a balancing weight II (27) with the same height are fixedly connected to the bottom of the traction base (21), lifting universal wheels (28) and transverse sliding small lifting wheels (29) which are symmetrically distributed are arranged at the bottom of the traction base (21), five groups of lifting universal wheels (28) are uniformly distributed at the bottom of the traction base (21), the balancing weight universal wheels (28) are composed of lifting parts and wheel bodies, four transverse sliding small lifting wheels (29) are uniformly distributed at the bottom of the two lifting universal wheels (29);

The telescopic end of the hydraulic cylinder (22) is slidably connected with a parallel frame assembly (30), the parallel frame assembly (30) comprises a sliding rail frame (31), the bottom of the sliding rail frame (31) is fixedly connected with a rack (32) and a driving box (33), and one side of the sliding rail frame (31) is fixedly connected with a handle (34);

the traction device comprises a sliding rail frame (31), and is characterized in that a traction assembly (40) is arranged at one end of the sliding rail frame (31), the traction assembly (40) comprises an arc-shaped rail (41), the arc-shaped rail (41) is rotationally connected with the sliding rail frame (31), limiting blocks (42) are fixedly connected to two ends of the outer side wall of the arc-shaped rail (41), a sliding block (43) is slidably connected to the outer side wall of the arc-shaped rail (41), a tension meter (44) is connected to one side of the sliding block (43) through a universal joint, and a foot rest assembly (50) is movably connected to one end of the tension meter (44);

The foot rest assembly (50) comprises a rotary connecting seat (51), a swinging connecting piece (52) is installed at one end of the rotary connecting seat (51), and a foot rest body (53) is movably connected to one end of the swinging connecting piece (52).

2. The multi-functional surgical device for traumatic orthopaedics as defined in claim 1, wherein a perineum pole plate (156) is connected to one side of said waist plate (153), and a perineum pole (1561) is fixedly connected to the top of said perineum pole plate (156).

3. The multi-functional surgical device for trauma orthopaedics according to claim 1, wherein a driving gear (331) is arranged in the driving box (33), the driving gear (331) is meshed with the rack (32), a worm gear (332) is meshed with the outer side wall of the driving gear (331), and a hand wheel (333) is fixedly connected with a central shaft of the worm gear (332).

4. The trauma orthopedic multifunctional surgical device according to claim 1, characterized in that a fixing bolt (431) is fixedly connected to the inside of the sliding block (43).

5. The trauma orthopedic multifunctional surgical device according to claim 1, characterized in that a universal joint is arranged at the joint of the sliding block (43) and the tension meter (44).

6. The multi-functional surgical device for traumatism orthopedics according to claim 1, wherein a battery, a hydraulic lifting button, a lifting universal wheel button and a transverse sliding small lifting wheel button are arranged on the traction base assembly (20), the battery can be charged, the hydraulic lifting button is used for controlling the hydraulic cylinder (22), the lifting universal wheel button is used for controlling the lifting universal wheel (28), and the transverse sliding small lifting wheel button is used for controlling the transverse sliding small lifting wheel (29).

7. The multi-functional surgical device of wound orthopaedics, according to claim 2, wherein one side joint of perineum pole board (156) has supporting component (60), supporting component (60) are including articulated pole (61), the lateral wall of articulated pole (61) is equipped with rotatory loop bar (66), the one end joint of rotatory loop bar (66) has drive portion (62), drive portion (62) include transmission seat (621), one side rotation of transmission seat (621) is connected with lifting hand wheel (622), one end fixedly connected with gear (623) of lifting hand wheel (622), the lateral wall meshing of gear (623) has pinion rack (624), the inside wall transmission of drive portion (62) is connected with bracing piece (63), pinion rack (624) are fixed on the lateral wall of bracing piece (63), the top of bracing piece (63) is equipped with supporting seat (64), the junction of supporting seat (64) with bracing piece (63) is equipped with universal seat (65).