CN113558845A

CN113558845A - Adjustable electric traction device for physiotherapy and rehabilitation

Info

Publication number: CN113558845A
Application number: CN202110829469.6A
Authority: CN
Inventors: 许莹; 郑刚
Original assignee: Hangzhou Yuran Medical Instrument Co ltd
Current assignee: Hangzhou Yuran Medical Instrument Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2021-10-29

Abstract

The invention discloses an adjustable electric traction device for physical therapy and rehabilitation, and particularly relates to the technical field of instruments for rehabilitation training. According to the chair, the driving unit is arranged, the screw rod is driven to rotate by the driving unit, the screw rod drives the screw sleeve to move left and right, the screw sleeve drives the connecting rod to move, the connecting rod drives the supporting column to swing left and right in a reciprocating mode through the first rotating mechanism and the second rotating mechanism, and the supporting column drives the chair main body to swing left and right in a reciprocating mode, so that the angle of a table and a chair is adjusted.

Description

Adjustable electric traction device for physiotherapy and rehabilitation

Technical Field

The invention relates to the technical field of instruments for rehabilitation training, in particular to an adjustable electric traction device for physical therapy rehabilitation.

Background

The sport therapy carried out by the rehabilitation center is a special therapy which plays a role in preventing, improving and recovering the dysfunction and hypofunction of the body of a patient through passive sport therapy, active sport therapy and anti-resistance sport therapy, and the main treatment objects are patients with central paralysis, joint contracture, joint rigidity and soft tissue injury, scapulohumeral periarthritis, cervical spondylosis and lumbar spondylosis caused by cerebrovascular diseases, orthopedic diseases and the like, and some instruments are matched while the manual therapy is carried out, wherein the instrument comprises the following components: the lower limb power vehicle for children is rehabilitation equipment for children with slight and moderate upper and lower limb functions and can improve the joint movement, muscle strength and coordination functions of the lower limbs.

In the prior art, the angle of the power car seat can not be adjusted, so that the foot force direction of a child patient is inconvenient to adjust, the child patients with different body types and heights are inconvenient to use, the treatment effect is influenced, and the improved part exists.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, embodiments of the present invention provide an adjustable physiotherapy electric traction apparatus to solve the problems set forth in the above-mentioned background art.

In order to achieve the purpose, the invention provides the following technical scheme: an adjustable electric traction device for physiotherapy and rehabilitation comprises a base, wherein the top surface of the base is fixedly connected with a frame, one side of the top surface of the frame is fixedly connected with a mounting plate, one side and the top of the mounting plate are provided with adjusting ports, a screw rod is arranged in the adjusting opening, one end of the screw rod is connected with the mounting plate through a bearing, a threaded sleeve is sleeved on the circumferential side wall of the screw rod through a thread, the bottom surface of the threaded sleeve is in sliding fit with the bottom surface of the inner wall of the mounting plate, the top end of the threaded sleeve is hinged with a connecting rod, a first rotating mechanism is arranged on one side of the top end of the connecting rod, a supporting column is fixedly connected on the other side of the first rotating mechanism, the bottom end of the supporting column is provided with a second rotating mechanism, the supporting column is fixedly connected with the top surface of the frame through the second rotating mechanism, the top surface of support column is provided with the seat main part, the other end of screw rod is provided with actuating mechanism.

Preferably, first pivot mechanism includes first fixed frame, one side fixed connection of first fixed frame in the support column, the top of connecting rod extends to the inside of first fixed frame, the top both sides of connecting rod are run through and are seted up first through-hole, the inside of first through-hole is provided with first pivot, the both ends of first pivot extend to the outside of first through-hole respectively and the inner wall of first fixed frame is connected to the bearing respectively.

Preferably, the second slewing mechanism includes the fixed frame of second, the top surface of the bottom surface fixed connection frame of the fixed frame of second, the bottom of support column extends to the inside of the fixed frame of second, the bottom both sides of support column are run through and are seted up the second through-hole, the inside of second through-hole is provided with the second pivot, the both ends of second pivot extend to the outside of second through-hole respectively and bearing connection respectively in the fixed frame of second.

Preferably, actuating mechanism includes driven gear, one side fixed connection of driven gear is in the screw rod, the first axis of rotation of driven gear's opposite side fixedly connected with, the end bearing of first axis of rotation is connected with fixed push pedal, driven gear's bottom transmission is connected with change gear, one side fixedly connected with second axis of rotation of change gear, the end bearing of second axis of rotation is connected in fixed push pedal, change gear's bottom is provided with drive unit, bottom one side fixed connection in base of fixed push pedal.

Preferably, the drive unit includes the motor, the bottom surface fixed connection base's of motor top surface, the output fixedly connected with connecting axle of motor, the terminal fixedly connected with driving gear of connecting axle, the driving gear meshes change gear, the opposite side fixedly connected with of driving gear connects the pivot, the other end of connecting the pivot extends to the opposite side of frame and is provided with complementary unit through the frame.

Preferably, the complementary unit includes fixed frame, the top surface of fixed frame's bottom surface fixed connection base, first regulation mouth has been seted up at one side and the top of fixed frame, the end of connecting the pivot extends to the inside and the fixedly connected with gear of first regulation mouth, the both sides of gear are provided with the lifting unit of symmetry.

Preferably, the lifting component includes the fixed body of rod, one side that the fixed body of rod is close to the gear is provided with the tooth that matches with the gear, tooth meshing is in the gear, one side fixedly connected with lifter plate of gear is kept away from to the fixed body of rod, the opposite side of lifter plate is provided with the spacing unit, the top surface fixedly connected with footboard of lifter plate, the bottom surface of the fixed body of rod is provided with damping mechanism.

Preferably, the limiting unit comprises a limiting sliding groove, the limiting sliding groove is formed in the inner wall of the fixed frame, and one end of the lifting plate extends to the inside of the limiting sliding groove and is connected to the limiting sliding groove in a sliding mode.

Preferably, damping mechanism includes the damping chamber, the damping chamber is seted up in the inside of the fixed body of rod, the bottom in damping chamber is provided with the bottom plate, the bottom surface fixed connection of bottom plate is in the inner wall bottom surface of the fixed body of rod, the top surface fixedly connected with spring of bottom plate, the top surface fixedly connected with roof of spring, the bottom surface fixedly connected with telescopic link of roof, the circumference lateral wall of telescopic link is located to the spring package, the bottom of telescopic link is worn to establish in proper order the bottom surface of the bottom plate and the fixed body of rod and is extended to the outside of the fixed body of rod and the inner wall bottom surface of fixed connection fixed frame.

The invention has the technical effects and advantages that:

1. compared with the prior art, through setting up drive unit, drive the screw rod through drive unit and rotate, the screw rod drives the swivel nut and removes about, and the swivel nut drives the connecting rod motion, and the connecting rod drives the support column reciprocating left and right sides swing through first slewing mechanism and second slewing mechanism, and the support column drives the seat main part reciprocating left and right sides swing to the realization is to the regulation of table chair angle.

2. Compared with the prior art, through setting up drive unit, through drive unit drive gear positive and negative rotation, the gear drives two fixed body of rod lifts through the tooth, and the fixed body of rod drives the lifter plate elevating movement, and the lifter plate drives footboard elevating movement, and the footboard drives people's foot and goes up and down to the lower limbs of propelling people goes up and down and carry out rehabilitation exercise.

3. Compared with the prior art, through setting up damping mechanism, set up damping mechanism in the bottom of the fixed body of rod, it is flexible to drive the telescopic link when the fixed body of rod goes up and down, and the telescopic link drives the roof and goes up and down, and the roof drives the spring and stretches out and draws back, thereby reaches the effect to the damping of people's foot through the flexible cushioning effect of spring.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic diagram of the framework structure of the present invention.

FIG. 3 is a schematic view of the structure of the mounting plate of the present invention.

Fig. 4 is a schematic sectional structure view of the first rotating mechanism of the present invention.

Fig. 5 is a schematic sectional structure view of a second rotating mechanism of the present invention.

Fig. 6 is an enlarged schematic view of the driving mechanism of the present invention.

FIG. 7 is a side view of the auxiliary mechanism of the present invention.

FIG. 8 is a schematic view of a fixing frame according to the present invention.

Fig. 9 is a schematic sectional structure view of the limiting unit of the present invention.

Fig. 10 is a schematic view of the internal structure of the damping chamber according to the present invention.

The reference signs are: 1. a base; 2. a frame; 3. mounting a plate; 4. an adjustment port; 5. a screw; 6. a threaded sleeve; 7. a connecting rod; 8. a first rotating mechanism; 9. a support pillar; 10. a second rotating mechanism; 11. a seat main body; 12. a drive mechanism; 13. a first fixed frame; 14. a first through hole; 15. a first rotating shaft; 16. a second fixed frame; 17. a second through hole; 18. a second rotating shaft; 19. a driven gear; 20. a first rotating shaft; 21. a speed change gear; 22. a second rotating shaft; 23. fixing the push plate; 24. a drive unit; 25. a motor; 26. a connecting shaft; 27. a driving gear; 28. connecting the rotating shaft; 29. an auxiliary mechanism; 30. a fixed frame; 31. a first regulating port; 32. a gear; 33. a lifting assembly; 34. fixing the rod body; 35. teeth; 36. a lifting plate; 37. a pedal; 38. a limiting unit; 39. a limiting chute; 40. a vibration reduction mechanism; 41. a vibration damping cavity; 42. a base plate; 43. a spring; 44. a top plate; 45. a telescopic rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in the attached drawings 1-6, an adjustable electric traction device for physiotherapy and rehabilitation comprises a base 1, a frame 2 is fixedly connected to the top surface of the base 1, a mounting plate 3 is fixedly connected to one side of the top surface of the frame 2, an adjusting port 4 is formed in one side and the top of the mounting plate 3, a screw rod 5 is arranged inside the adjusting port 4, one end of the screw rod 5 is connected to the mounting plate 3 through a bearing, a threaded sleeve 6 is sleeved on the circumferential side wall of the screw rod 5 in a threaded manner, the bottom surface of the threaded sleeve 6 is in sliding fit with the bottom surface of the inner wall of the mounting plate 3, a connecting rod 7 is hinged to the top end of the threaded sleeve 6, a first rotating mechanism 8 is arranged on one side of the top end of the connecting rod 7, a supporting column 9 is fixedly connected to the other side of the first rotating mechanism 8, a second rotating mechanism 10 is arranged at the bottom end of the supporting column 9, the supporting column 9 is fixedly connected to the top surface of the frame 2 through the second rotating mechanism 10, and a seat body 11 is arranged on the top surface of the supporting column 9, the other end of the screw 5 is provided with a driving mechanism 12; through setting up actuating mechanism 12 and driving screw rod 5 forward and backward rotation, screw rod 5 drives swivel nut 6 reciprocating motion about, and reciprocating motion about swivel nut 6 drives the bottom of connecting rod 7, and connecting rod 7 drives the top reciprocating motion about support column 9 through first slewing mechanism 8 and second slewing mechanism 10, and support column 9 drives seat main part 11 reciprocating motion about, realizes the regulation to 11 angles of seat main part, wherein: the first rotating mechanism 8 comprises a first fixing frame 13, one side of the first fixing frame 13 is fixedly connected to the support column 9, the top end of the connecting rod 7 extends into the first fixing frame 13, first through holes 14 are formed in two sides of the top end of the connecting rod 7 in a penetrating mode, first rotating shafts 15 are arranged inside the first through holes 14, two ends of each first rotating shaft 15 respectively extend to the outer portions of the first through holes 14 and are respectively connected with the inner walls of the first fixing frame 13 through bearings, when the connecting rod 7 moves, the top of the connecting rod 7 is driven to move, the connecting rod 7 drives the first rotating shafts 15 to rotate along the bearings through the first through holes 14, the rotation of the top of the connecting rod 7 is facilitated, and therefore the connecting rod 7 can drive the top of the support column 9 to swing back and forth left and right; wherein: second slewing mechanism 10 includes the fixed frame 16 of second, the top surface of the bottom surface fixed connection frame 2 of the fixed frame 16 of second, the bottom of support column 9 extends to the inside of the fixed frame 16 of second, the bottom both sides of support column 9 are run through and have been seted up second through-hole 17, the inside of second through-hole 17 is provided with second pivot 18, the both ends of second pivot 18 extend to the outside of second through-hole 17 respectively and bearing connection respectively in the fixed frame 16 of second, when the motion of support column 9, its bottom drives second pivot 18 along the bearing rotation through second through-hole 17, rotate support column 9 bottom, thereby realize the regulation to seat main part 11 angles through support column 9.

Further, as shown in fig. 6 to 9, the driving mechanism 12 includes a driven gear 19, one side of the driven gear 19 is fixedly connected to the screw 5, the other side of the driven gear 19 is fixedly connected with a first rotating shaft 20, a terminal bearing of the first rotating shaft 20 is connected with a fixed push plate 23, a bottom transmission of the driven gear 19 is connected with a speed change gear 21, one side of the speed change gear 21 is fixedly connected with a second rotating shaft 22, a terminal bearing of the second rotating shaft 22 is connected to the fixed push plate 23, a driving unit 24 is arranged at the bottom of the speed change gear 21, one side of the bottom of the fixed push plate 23 is fixedly connected to the base 1, the speed change gear 21 is driven by the driving unit 24 to rotate the driven gear 19, so as to realize the adjustment of the output end speed of the driving unit 24, so that the operation of the device is more gradual, wherein: drive unit 24 includes motor 25, the bottom surface fixed connection base 1's of motor 25 top surface, motor 25's output fixedly connected with connecting axle 26, connecting axle 26's terminal fixedly connected with driving gear 27, driving gear 27 meshes in change gear 21, driving gear 27's opposite side fixedly connected with connects pivot 28, the other end of connecting pivot 28 passes through frame 2 and extends to frame 2's opposite side and be provided with complementary unit 29, open motor 25, motor 25 drives connecting axle 26 and rotates, connecting axle 26 drives driving gear 27 and rotates, driving gear 27 drives change gear 21 and connects pivot 28 synchronous rotation, wherein: the auxiliary mechanism 29 comprises a fixed frame 30, the bottom surface of the fixed frame 30 is fixedly connected with the top surface of the base 1, one side and the top of the fixed frame 30 are provided with a first adjusting opening 31, the tail end of the connecting rotating shaft 28 extends to the inside of the first adjusting opening 31 and is fixedly connected with a gear 32, and two sides of the gear 32 are provided with symmetrical lifting components 33; the connecting rotating shaft 28 rotates to drive the gear 32 to rotate, the gear 32 drives the lifting assembly 33 to move, further, the lifting assembly 33 comprises a fixed rod body 34, one side, close to the gear 32, of the fixed rod body 34 is provided with teeth 35 matched with the gear 32, the teeth 35 are meshed with the gear 32, one side, far away from the gear 32, of the fixed rod body 34 is fixedly connected with a lifting plate 36, the other side of the lifting plate 36 is provided with a limiting unit 38, the top surface of the lifting plate 36 is fixedly connected with a pedal 37, and the bottom surface of the fixed rod body 34 is provided with a vibration damping mechanism 40; furthermore, the limiting unit 38 includes a limiting sliding groove 39, the limiting sliding groove 39 is opened on the inner wall of the fixed frame 30, and one end of the lifting plate 36 extends into the limiting sliding groove 39 and is slidably connected to the limiting sliding groove 39; the gear 32 rotates to drive the fixed rod body 34 to lift through the teeth 35, the fixed rod body 34 drives the lifting plate 36 to lift, the lifting plate 36 drives the pedal 37 to lift through the limiting sliding groove 39 to drive the feet of the person to move, and therefore the lower limbs of the person are driven to move.

Further, as shown in fig. 7 and 10, the damping mechanism 40 includes a damping cavity 41, the damping cavity 41 is opened inside the fixed rod 34, a bottom plate 42 is disposed at the bottom of the damping cavity 41, a bottom surface of the bottom plate 42 is fixedly connected to a bottom surface of an inner wall of the fixed rod 34, a spring 43 is fixedly connected to a top surface of the bottom plate 42, a top plate 44 is fixedly connected to a top surface of the spring 43, an expansion link 45 is fixedly connected to a bottom surface of the top plate 44, the spring 43 is wrapped on a circumferential side wall of the expansion link 45, and a bottom end of the expansion link 45 sequentially penetrates through the bottom plate 42 and the bottom surface of the fixed rod 34 to extend to the outside of the fixed rod 34 and is fixedly connected to the bottom surface of the inner wall of the fixed frame 30; when the fixed rod body 34 goes up and down, the telescopic rod 45 is driven to stretch, the telescopic rod 45 drives the top plate 44 to go up and down, the top plate 44 drives the spring 43 to stretch, and the damping is carried out under the stretching buffer action of the spring 43, so that the damping purpose is achieved.

The working principle of the invention is as follows: firstly, a patient is held to the top surface of the seat main body 11, the soles are respectively arranged on the top surfaces of the pedals 37, then the motor 25 is started, the motor 25 drives the connecting shaft 26 to rotate, the connecting shaft 26 drives the driving gear 27 to rotate, the driving gear 27 drives the speed change gear 21 and the connecting rotating shaft 28 to synchronously rotate, the speed change gear 21 drives the driven gear 19 to rotate, the driven gear 19 drives the screw rod 5 to rotate, the screw rod 5 drives the threaded sleeve 6 to do reciprocating motion left and right, the threaded sleeve 6 drives the bottom end of the connecting rod 7 to do reciprocating motion left and right, when the connecting rod 7 moves, the top of the connecting rod 7 is driven to move, the connecting rod 7 drives the first rotating shaft 15 to rotate along the bearing through the first through hole 14, so that the top of the connecting rod 7 can conveniently drive the top of the supporting column 9 to do reciprocating swing left and right, meanwhile, when the supporting column 9 moves, the bottom of the supporting column drives the second rotating shaft 18 to rotate along the bearing through the second through hole 17, so as to rotate the bottom of the supporting column 9, thereby realizing the adjustment of the angle of the seat body 11 through the support column 9; meanwhile, the connecting rotating shaft 28 rotates to drive the gear 32 to rotate, the gear 32 drives the fixed rod body 34 to lift through the teeth 35, the fixed rod body 34 drives the lifting plate 36 to lift, the lifting plate 36 drives the pedal 37 to lift through the limiting sliding groove 39 to drive the feet of the person to move, and therefore the lower limbs of the person are driven to move.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. The utility model provides an electronic draw gear is used in physiotherapy rehabilitation with adjustable, includes base (1), its characterized in that: the top surface fixedly connected with frame (2) of base (1), top surface one side fixedly connected with mounting panel (3) of frame (2), regulation mouth (4) have been seted up at one side and the top of mounting panel (3), the inside of adjusting mouth (4) is provided with screw rod (5), the one end bearing of screw rod (5) is connected in mounting panel (3), the circumference lateral wall thread bush of screw rod (5) is equipped with swivel nut (6), the inner wall bottom surface of bottom surface slip laminating mounting panel (3) of swivel nut (6), the top of swivel nut (6) articulates there is connecting rod (7), top end one side of connecting rod (7) is provided with first slewing mechanism (8), opposite side fixedly connected with support column (9) of first slewing mechanism (8), the bottom of support column (9) is provided with second slewing mechanism (10), support column (9) are through the top surface of second slewing mechanism (10) fixed connection frame (2), the top surface of the support column (9) is provided with a seat body (11), and the other end of the screw rod (5) is provided with a driving mechanism (12).

2. The adjustable physiotherapy electric traction apparatus according to claim 1, wherein: first slewing mechanism (8) are including first fixed frame (13), one side fixed connection in support column (9) of first fixed frame (13), the top of connecting rod (7) extends to the inside of first fixed frame (13), the top both sides of connecting rod (7) are run through and have been seted up first through-hole (14), the inside of first through-hole (14) is provided with first pivot (15), the both ends of first pivot (15) extend to the outside of first through-hole (14) respectively and the inner wall of first fixed frame (13) is connected to the bearing respectively.

3. The adjustable physiotherapy electric traction apparatus according to claim 1, wherein: second slewing mechanism (10) include the fixed frame of second (16), the top surface of the bottom surface fixed connection frame (2) of the fixed frame of second (16), the bottom of support column (9) extends to the inside of the fixed frame of second (16), the bottom both sides of support column (9) are run through and have been seted up second through-hole (17), the inside of second through-hole (17) is provided with second pivot (18), the both ends of second pivot (18) extend to the outside of second through-hole (17) respectively and bearing connection in the fixed frame of second (16) respectively.

4. The adjustable physiotherapy electric traction apparatus according to claim 1, wherein: actuating mechanism (12) include driven gear (19), one side fixed connection in screw rod (5) of driven gear (19), the first axis of rotation of opposite side fixedly connected with (20) of driven gear (19), the end bearing of first axis of rotation (20) is connected with fixed push pedal (23), the bottom transmission of driven gear (19) is connected with change gear (21), one side fixedly connected with second axis of rotation (22) of change gear (21), the end bearing of second axis of rotation (22) is connected in fixed push pedal (23), the bottom of change gear (21) is provided with drive unit (24), bottom one side fixed connection in base (1) of fixed push pedal (23).

5. The adjustable physiotherapy electric traction apparatus according to claim 4, wherein: drive unit (24) include motor (25), the top surface of the bottom surface fixed connection base (1) of motor (25), the output fixedly connected with connecting axle (26) of motor (25), the terminal fixedly connected with driving gear (27) of connecting axle (26), driving gear (27) mesh in change gear (21), the opposite side fixedly connected with of driving gear (27) connects pivot (28), the other end of connecting pivot (28) passes through frame (2) and extends to the opposite side of frame (2) and is provided with complementary unit (29).

6. The adjustable physiotherapy electric traction apparatus according to claim 5, wherein: complementary unit (29) is including fixed frame (30), the top surface of the bottom surface fixed connection base (1) of fixed frame (30), first regulation mouth (31) have been seted up at one side and the top of fixed frame (30), the end of connecting pivot (28) extends to inside and fixedly connected with gear (32) of first regulation mouth (31), the both sides of gear (32) are provided with symmetrical lifting unit (33).

7. The adjustable physiotherapy electric traction apparatus according to claim 6, wherein: lifting unit (33) are including the fixed body of rod (34), one side that the fixed body of rod (34) is close to gear (32) is provided with tooth (35) that matches with gear (32), tooth (35) mesh in gear (32), one side fixedly connected with lifter plate (36) of gear (32) are kept away from to the fixed body of rod (34), the opposite side of lifter plate (36) is provided with limiting unit (38), top surface fixedly connected with footboard (37) of lifter plate (36), the bottom surface of the fixed body of rod (34) is provided with damping mechanism (40).

8. The adjustable physiotherapy electric traction apparatus according to claim 7, wherein: spacing unit (38) include spacing spout (39), the inner wall of fixed frame (30) is seted up in spacing spout (39), the one end of lifter plate (36) extends to the inside and sliding connection in spacing spout (39) of spacing spout (39).

9. The adjustable physiotherapy electric traction apparatus according to claim 7, wherein: damping mechanism (40) are including damping chamber (41), the inside of the fixed body of rod (34) is seted up in damping chamber (41), the bottom of damping chamber (41) is provided with bottom plate (42), the bottom surface fixed connection in the inner wall bottom surface of the fixed body of rod (34) of bottom plate (42), the top surface fixedly connected with spring (43) of bottom plate (42), the top surface fixedly connected with roof (44) of spring (43), the bottom surface fixedly connected with telescopic link (45) of roof (44), the circumference lateral wall of telescopic link (45) is located in spring (43) package, the bottom of telescopic link (45) is worn to establish bottom plate (42) and the bottom surface of the fixed body of rod (34) in proper order and is extended to the inside wall bottom surface of outside and fixed connection fixed frame (30) of the fixed body of rod (34).