CN113288710A

CN113288710A - Be used for neurosurgery postoperative recovery equipment

Info

Publication number: CN113288710A
Application number: CN202110397413.8A
Authority: CN
Inventors: 梁建国
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-08-24

Abstract

The invention relates to the technical field of medical care equipment, in particular to post-operation recovery equipment for neurosurgery, wherein a lifting rod sleeve rod is fixed at the position, located at the center, of the upper side of a bottom plate, a lifting electric telescopic rod is installed at the position, located at the inner side of the lifting rod sleeve rod, of the upper side of the bottom plate, a transverse plate is fixed at the telescopic end of the lifting electric telescopic rod, one end of the inner side of the transverse plate is rotatably connected with a first turnover plate, and a fixing plate is fixed at the position, located at one end of the first turnover plate, of the inner side of the transverse plate. According to the invention, the angle-adjusting electric telescopic rod and the linkage mechanism can drive the first turnover plate, the second turnover plate and the third turnover plate to be in linkage turnover, so that the body and the legs of a patient can be movably exercised, the quick rehabilitation of limb nerves is facilitated, the nursing difficulty of medical care personnel is reduced, the height of the hanging ring can be adjusted through the height positioning mechanism, and the angle-adjusting electric telescopic rod is suitable for the arm strength exercise of patients with different heights, and the arm nerve rehabilitation speed is improved.

Description

Be used for neurosurgery postoperative recovery equipment

Technical Field

The invention relates to the technical field of medical care equipment, in particular to post-operation recovery equipment for neurosurgery.

Background

After neurosurgery, a patient in the department of neurology needs to lie in bed for recovering a certain time, and in the later-stage nursing, the limb of the patient needs to be exercised actively, so that the nervous system of the patient can be recovered quickly.

But do not have the equipment that is used for patient's limbs activity to take exercise specially at present, need medical personnel to take exercise patient's limbs regularly in nursing, this kind of nursing mode will increase medical personnel's the work degree of difficulty by a wide margin, has taken up more medical resources, receives medical personnel's operation level to influence moreover, hardly takes exercise evenly to each position of patient's limbs, is unfavorable for patient nervous system's quick recovery.

Accordingly, one skilled in the art provides a device for neurosurgical postoperative rehabilitation to solve the problems set forth in the background art described above.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems occurring in the background art, and an object of the present invention is to provide a device for neurosurgical postoperative rehabilitation.

In order to achieve the purpose, the invention provides the following technical scheme: a post-operation recovery device for neurosurgery comprises a bottom plate, wherein a lifting rod sleeve rod is fixed at the position, located at the center, of the upper side of the bottom plate, a lifting electric telescopic rod is installed at the position, located at the inner side of the lifting rod sleeve rod, of the upper side of the bottom plate, a transverse plate is fixed at the telescopic end of the lifting electric telescopic rod, a first turnover plate is rotatably connected to one end of the inner side of the transverse plate, a fixed plate is fixed at the position, located at one end of the fixed plate, of the inner side of the transverse plate, a second turnover plate is rotatably connected to one end of the transverse plate, a third turnover plate is rotatably connected to one end of the second turnover plate, two sliding grooves are symmetrically formed in the positions, located at one end of the two sides of the transverse plate, two sliding shafts are respectively in sliding connection with the two sliding grooves, a linkage mechanism is arranged between the second turnover plate and the transverse plate, the first turnover plate and the transverse plate, one end of the transverse plate is rotatably connected with an angle adjusting electric telescopic rod, the telescopic end of the angle adjusting electric telescopic rod is rotatably connected with one side of the first turnover plate, four fixing rods which are arranged in a rectangular shape are fixed at the position, which is positioned right above the fixing plate, of the upper side of the transverse plate, lifting rods are slidably inserted at the upper ends of the four fixing rods, height positioning mechanisms are arranged between the four lifting rods and the four fixing rods, and the top that is located two lifter of one end all is fixed with the horizontal pole, two it all is fixed with the guide arm to lie in both ends position department between the horizontal pole, two the outside of guide arm all slides the cover and is equipped with sliding sleeve, two sliding sleeve's one side all is fixed with rings, the both ends of bottom plate all are provided with the same support positioning mechanism of structure.

As a still further scheme of the invention: the linkage mechanism comprises a gear cavity arranged on one side inside the transverse plate and corresponding to the position of the fixing plate, first gears are connected to two ends of the inner side of the gear cavity in a rotating mode, two second gears are connected to the inner side of the gear cavity between the two first gears in a rotating mode, the two second gears are meshed with each other through teeth, the first gears are meshed with the two second gears through teeth, and one ends of the two first gears are fixed to one side of the first turnover plate and one side of the second turnover plate through rotating shafts.

As a still further scheme of the invention: the height positioning mechanism comprises a spring shell and a positioning hole, wherein the spring shell is fixed on one side of the fixing rod and located at the upper end position, the positioning hole is evenly formed in one side of the lifting rod, the inner portion of the spring shell is connected with an inserting rod extending to the inner side of the fixing rod in a penetrating and sliding mode, a convex ring is fixed on the outer side of the inserting rod and connected with the inner side of the spring shell in a sliding mode, one end of the convex ring is connected with a spring sleeved on the outer side of the inserting rod, and the inserting rod is matched with the positioning.

As a still further scheme of the invention: the supporting and positioning mechanism comprises a supporting shell fixed at one end of the bottom plate, telescopic supporting rods are slidably inserted at both ends of the supporting shell, the inner sides of the two telescopic supporting rods are rotatably connected with screw rods through threads, one ends of the two screw rods are rotatably connected with the inner side of the supporting shell, and one end of each of the two screws is fixed with a screw bevel gear, one side of the supporting shell is positioned at the middle section and is rotatably inserted with an adjusting shaft, a driving bevel gear is fixed at one end of the adjusting shaft, two first bevel gears are symmetrically arranged at two sides of the driving bevel gear, the two first bevel gears are meshed with the driving bevel gear through teeth, and one end of each of the two first bevel gears is fixed with a transmission shaft, one end of each of the two transmission shafts is fixed with a second bevel gear, and the two second bevel gears are meshed with the two screw bevel gears through teeth.

As a still further scheme of the invention: and one end of each of the two telescopic supporting rods is fixed with an antiskid plate, and the antiskid plates are made of rubber materials.

As a still further scheme of the invention: the outer sides of the two transmission shafts are symmetrically and rotatably sleeved with two supporting plates at two end positions, and the four supporting plates are fixed with the inner side of the supporting shell.

As a still further scheme of the invention: the both sides of bottom plate are located the equal symmetry of both ends position department and are rotated and be connected with two and remove the wheel, and the upside both ends of bottom plate all are provided with the storing box.

As a still further scheme of the invention: the upper side of bottom plate is located middle section position department and is fixed with four sleeves that are the rectangle and arrange, four telescopic upper end is all slided and is inserted and be equipped with flexible guide arm, four the top of flexible guide arm all is fixed mutually with the downside of diaphragm.

As a still further scheme of the invention: and one end of each of the four lifting rods is fixed with a stabilizing plate, and the four stabilizing plates are respectively connected with the inner sides of the four fixing rods in a sliding manner.

Compared with the prior art, the invention has the beneficial effects that:

1. the angle-adjusting electric telescopic rod and the linkage mechanism can drive the first turnover plate, the second turnover plate and the third turnover plate to be in linkage turnover, so that the body and the legs of a patient can be actively exercised, the quick rehabilitation of limb nerves is facilitated, and the nursing difficulty of medical staff is reduced;

2. the height of the hanging ring can be adjusted through the height positioning mechanism, so that the arm strength training device is suitable for patients with different heights to carry out arm strength training, and the arm nerve rehabilitation speed is improved;

3. the supporting and positioning mechanism is used for supporting and positioning the whole equipment, so that the equipment is prevented from moving, and the placing stability of the equipment is improved;

4. through removing the wheel, can improve the convenience to the whole removal of equipment.

Drawings

FIG. 1 is a schematic structural view of a post-operative recovery apparatus for neurosurgery;

FIG. 2 is a side view of a device for post-surgical recovery from neurosurgery;

FIG. 3 is an enlarged schematic view of a portion of FIG. 1 at A for use in a neurosurgical postoperative rehabilitation apparatus;

FIG. 4 is an enlarged schematic view of a post-operative recovery apparatus for neurosurgery at point B in FIG. 2;

FIG. 5 is a schematic structural view of a support positioning mechanism for use in a neurosurgical postoperative rehabilitation apparatus;

FIG. 6 is a schematic structural view of a linkage mechanism used in a neurosurgical postoperative rehabilitation apparatus;

fig. 7 is a schematic structural view of a high positioning mechanism used in a neurosurgical postoperative rehabilitation apparatus.

In the figure: 1. a base plate; 2. a lifting rod sleeve rod; 3. lifting the electric telescopic rod; 4. a transverse plate; 5. a first roll-over plate; 6. a fixing plate; 7. a second roll-over plate; 8. a third roll-over plate; 9. an angle adjusting electric telescopic rod; 10. fixing the rod; 11. a lifting rod; 12. a cross bar; 13. a guide bar; 14. a sliding sleeve; 15. a hoisting ring; 16. a chute; 17. a slide shaft; 18. a support housing; 19. a telescopic support rod; 20. a screw; 21. a screw bevel gear; 22. an adjustment shaft; 23. a drive bevel gear; 24. a first bevel gear; 25. a drive shaft; 26. a second bevel gear; 27. a support plate; 28. an anti-skid plate; 29. a first gear; 30. a second gear; 31. a spring shell; 32. inserting a rod; 33. a convex ring; 34. a spring; 35. a sleeve; 36. a telescopic guide rod; 37. and a stabilizing plate.

Detailed Description

Referring to fig. 1 to 7, in the embodiment of the invention, a post-operation recovery device for neurosurgery comprises a base plate 1, a lifting rod sleeve rod 2 is fixed at the central position of the upper side of the base plate 1, a lifting electric telescopic rod 3 is installed at the position of the inner side of the lifting rod sleeve rod 2 at the upper side of the base plate 1, a transverse plate 4 is fixed at the telescopic end of the lifting electric telescopic rod 3, a first turnover plate 5 is rotatably connected at one end of the inner side of the transverse plate 4, a fixed plate 6 is fixed at the position of one end of the first turnover plate 5 at the inner side of the transverse plate 4, a second turnover plate 7 is rotatably connected at the position of one end of the fixed plate 6 at the inner side of the transverse plate 4, a third turnover plate 8 is rotatably connected at one end of the second turnover plate 7, two sliding grooves 16 are symmetrically formed at the positions of two sides of the inner side of the transverse plate 4 at one end of the third turnover plate 8, two sliding shafts 17 are symmetrically rotatably connected at the position of two sides of the third turnover plate 8, two sliding shafts 17 are respectively connected with two sliding grooves 16 in a sliding manner, a linkage mechanism is arranged between the second turnover plate 7, the first turnover plate 5 and the transverse plate 4, one end of the transverse plate 4 is rotatably connected with an angle adjusting electric telescopic rod 9, the telescopic end of the angle adjusting electric telescopic rod 9 is rotatably connected with one side of the first turnover plate 5, four fixing rods 10 which are arranged in a rectangular manner are fixed at the position right above the fixing plate 6 at the upper side of the transverse plate 4, lifting rods 11 are respectively inserted at the upper ends of the four fixing rods 10 in a sliding manner, a height positioning mechanism is respectively arranged between the four lifting rods 11 and the four fixing rods 10, cross rods 12 are respectively fixed at the top ends of the two lifting rods 11 at one end, guide rods 13 are respectively fixed at the positions at two ends between the two cross rods 12, sliding sleeves 14 are respectively sleeved at the outer sides of the two guide rods 13 in a sliding manner, and a hanging ring 15 is respectively fixed at one side of the two sliding sleeves 14, the two ends of the bottom plate 1 are provided with supporting and positioning mechanisms with the same structure.

In fig. 6: the link gear is including seting up the gear chamber that corresponds fixed plate 6 position department in the inside one side of diaphragm 4, the inboard both ends in gear chamber all rotate and be connected with first gear 29, and the inboard position department that is located between two first gears 29 of gear chamber rotates and is connected with two second gears 30, through the tooth meshing between two second gears 30, two first gears 29 respectively with two second gears 30 between through the tooth meshing, and the one end of two first gears 29 is all fixed mutually with one side of first returning face plate 5 and second returning face plate 7 through the pivot respectively, link gear can drive first returning face plate 5, second returning face plate 7, the upset of the 8 linkage of third returning face plate, carry out the activity to patient's health and shank and take exercise, help the neural quick recovery of limbs, medical personnel's the nursing degree of difficulty has been reduced.

In fig. 7: height positioning mechanism is including being fixed in the spring shell 31 that dead lever 10 one side is located upper end position department and evenly seting up the locating hole in lifting rod 11 one side, the inside through sliding connection of spring shell 31 has the inserted bar 32 that extends to dead lever 10 inboard, the outside of inserted bar 32 is fixed with bulge loop 33, the inboard sliding connection of bulge loop 33 and spring shell 31, and the one end of bulge loop 33 is connected with the spring 34 of cover locating the inserted bar 32 outside, inserted bar 32 and locating hole looks adaptation, height positioning mechanism, can adjust the height of rings, be applicable to the patient of different heights and carry out arm strength exercise, improve the nervous recovered speed of arm, height positioning mechanism, can adjust the height of rings 15, be applicable to the patient of different heights and carry out arm strength exercise, improve the nervous recovered speed of arm.

In fig. 5: the supporting and positioning mechanism comprises a supporting shell 18 fixed at one end of the bottom plate 1, telescopic support rods 19 are inserted at two ends of the supporting shell 18 in a sliding manner, screws 20 are rotatably connected to the inner sides of the two telescopic support rods 19 through threads, one ends of the two screws 20 are rotatably connected with the inner side of the supporting shell 18, one ends of the two screws 20 are respectively fixed with a bevel gear 21, one side of the supporting shell 18 is rotatably inserted at the middle section position and is provided with an adjusting shaft 22, one end of the adjusting shaft 22 is fixedly provided with a drive bevel gear 23, two first bevel gears 24 are symmetrically arranged at two sides of the drive bevel gear 23, the two first bevel gears 24 are respectively meshed with the drive bevel gear 23 through teeth, one ends of the two first bevel gears 24 are respectively fixed with a transmission shaft 25, one ends of the two transmission shafts 25 are respectively fixed with a second bevel gear 26, the two second bevel gears 26 are respectively meshed with the two bevel gears 21 through teeth, support positioning mechanism, support and fix a position equipment is whole, prevent that equipment from removing, improve it and place stability.

In fig. 5: the one end of two flexible bracing pieces 19 all is fixed with antiskid ribbed tile 28, and two antiskid ribbed tiles 28 all adopt the component of rubber material, and antiskid ribbed tile 28 plays anti-skidding effect, improve equipment's stability in placement.

In fig. 5: the outer sides of the two transmission shafts 25 are symmetrically and rotatably sleeved with two supporting plates 27 at two end positions, the four supporting plates 27 are fixed with the inner side of the supporting shell 18, and the supporting plates 27 are used for supporting the transmission shafts 25 and improving the rotation stability of the transmission shafts.

In fig. 1: the both sides of bottom plate 1 are located the equal symmetry of both ends position department and are rotated and be connected with two and remove the wheel, and the upside both ends of bottom plate 1 all are provided with the storing box, remove the wheel convenience and remove equipment is whole, and the storing box can be used for placing relevant articles for use, has improved the practicality.

In fig. 2: the upside of bottom plate 1 is located middle section position department and is fixed with four sleeves 35 that are the rectangle and arrange, and the upper end of four sleeves 35 all slides and inserts and be equipped with flexible guide arm 36, and the top of four flexible guide arms 36 all is fixed mutually with diaphragm 4's downside, and sliding connection between flexible guide arm 36 and the sleeve 35 has improved diaphragm 4's lift stability.

In fig. 7: stabilizing plates 37 are fixed at one ends of the four lifting rods 11, the four stabilizing plates 37 are respectively connected with the inner sides of the four fixing rods 10 in a sliding manner, and the stabilizing plates 37 improve the sliding stability between the lifting rods 11 and the fixing rods 10.

The working principle of the invention is as follows: the telescopic end of the angle adjusting electric telescopic rod 9 is controlled to extend out, the telescopic end of the angle adjusting electric telescopic rod 9 drives the first turnover plate 5 to turn upwards, the first turnover plate 5 turns over to drive a first gear 29 of the linkage mechanism to rotate, the first gear 29 drives a second gear 30 on one side of the first gear to rotate reversely through teeth, the second gear 30 drives another second gear 30 to rotate reversely through tooth meshing, the second gear 30 drives another first gear 29 to rotate reversely through tooth meshing, so that the two first gears 29 rotate reversely, the other first gear 29 drives the second turnover plate 7 to turn upwards, the second turnover plate 7 drives one end of the third turnover plate 8 to turn upwards, the other end of the third turnover plate 8 translates through sliding fit between the sliding shaft 17 and the sliding chute 16, the first turnover plate 5 can drive the upper body of a patient to rotate when turning over, the second turnover plate 7 can drive the thigh of the patient to move when turned, the third turnover plate 8 can drive the shank of the patient to move when turned, thereby playing a training effect, being helpful for the quick rehabilitation of the body nerve of the patient, the arm strength of the patient can be trained through the hanging ring 15, being helpful for the rehabilitation of the arm nerve of the patient, the inserted link 32 of the height positioning mechanism is pulled, the inserted link 32 drives the convex ring 33 to move and compress the spring 34, so that one end of the inserted link 32 is separated from one positioning hole at one side of the lifting link 11, then the lifting link 11 is slid, the lifting link 11 drives the cross rod 12 to lift, when the cross rod 12 reaches a proper height, the inserted link 32 is loosened, the inserted link 32 is inserted into one positioning hole, so that the extending length of the lifting link 11 can be fixed, the height of the hanging ring 15 can be conveniently adjusted, the device can be suitable for the training of the patients with different heights, the whole device can be conveniently moved through the moving wheel, improve the convenience, rotate regulating spindle 22, regulating spindle 22 drives the rotation of drive bevel gear 23, drive bevel gear 23 drives two first bevel gear 24 antiport through tooth meshing, two first bevel gear 24 drive two transmission shafts 25 and rotate, two transmission shafts 25 drive two second bevel gear 26 antiport, two second bevel gear 26 drive two screw bevel gear 21 through tooth meshing and rotate, two screw bevel gear 21 drive two screw rods 20 and rotate, screw rod 20 drives flexible bracing piece 19 through thread meshing and stretches out and retract, thereby can fix a position the support to equipment wholly, the stability that equipment was placed has been improved, stretch out and retract through the flexible end of control lift electric telescopic handle 3, can adjust the height of diaphragm 4, make things convenient for patient's upper and lower bed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.

Claims

1. The utility model provides a be used for neurosurgery postoperative recovery equipment, includes bottom plate (1), its characterized in that, the upside of bottom plate (1) is located central point and puts the department and be fixed with lifter loop bar (2), and the inboard position department that the upside of bottom plate (1) is located lifter loop bar (2) installs lift electric telescopic handle (3), the flexible end of lift electric telescopic handle (3) is fixed with diaphragm (4), the inboard one end of diaphragm (4) is rotated and is connected with first returning face plate (5), and the inboard one end position department that is located first returning face plate (5) of diaphragm (4) is fixed with fixed plate (6), the inboard one end position department that is located fixed plate (6) of diaphragm (4) rotates and is connected with second returning face plate (7), the one end of second returning face plate (7) rotates and is connected with third returning face plate (8), two spouts (16) have been seted up to the one end position department symmetry that the inside both sides of diaphragm (4) are located third returning face plate (8) has been seted ) Two sliding shafts (17) are symmetrically and rotatably connected to positions, located at one end, of two sides of the third turnover plate (8), two sliding shafts (17) are respectively and slidably connected with two sliding grooves (16), a linkage mechanism is arranged between the second turnover plate (7), the first turnover plate (5) and the transverse plate (4), one end of the transverse plate (4) is rotatably connected with an angle adjusting electric telescopic rod (9), a telescopic end of the angle adjusting electric telescopic rod (9) is rotatably connected with one side of the first turnover plate (5), four fixing rods (10) which are arranged in a rectangular shape are fixed to positions, located right above the fixing plate (6), of the upper side of the transverse plate (4), lifting rods (11) are slidably inserted into the upper ends of the four fixing rods (10), and height positioning mechanisms are arranged between the four lifting rods (11) and the four fixing rods (10), and the top that is located two lifter (11) of one end all is fixed with horizontal pole (12), two it all is fixed with guide arm (13) to lie in both ends position department between horizontal pole (12), two the outside of guide arm (13) is all slided the cover and is equipped with sliding sleeve (14), two one side of sliding sleeve (14) all is fixed with rings (15), the both ends of bottom plate (1) all are provided with the support positioning mechanism that the structure is the same.

2. The post-operation recovery device for the neurosurgery department according to claim 1, characterized in that the linkage mechanism comprises a gear cavity which is arranged on one side inside the transverse plate (4) and corresponds to the position of the fixing plate (6), two ends of the inner side of the gear cavity are rotatably connected with first gears (29), two second gears (30) are rotatably connected to the inner side of the gear cavity between the two first gears (29), the two second gears (30) are meshed with each other through teeth, the two first gears (29) are respectively meshed with the two second gears (30) through teeth, and one ends of the two first gears (29) are respectively fixed with one sides of the first turnover plate (5) and the second turnover plate (7) through rotating shafts.

3. The post-operative recovery apparatus for neurosurgery department according to claim 1, characterized in that, the height positioning mechanism comprises a spring shell (31) fixed on one side of the fixing rod (10) and located at the upper end position and positioning holes uniformly opened on one side of the lifting rod (11), an insertion rod (32) extending to the inner side of the fixing rod (10) is connected inside the spring shell (31) in a penetrating and sliding manner, a convex ring (33) is fixed on the outer side of the insertion rod (32), the convex ring (33) is connected with the inner side of the spring shell (31) in a sliding manner, one end of the convex ring (33) is connected with a spring (34) sleeved on the outer side of the insertion rod (32), and the insertion rod (32) is matched with the positioning holes.

4. The post-operative recovery device for neurosurgery department according to claim 1, wherein said supporting and positioning mechanism comprises a supporting shell (18) fixed on one end of the bottom plate (1), two ends of said supporting shell (18) are slidably inserted with telescopic supporting rods (19), the inner sides of two said telescopic supporting rods (19) are rotatably connected with screws (20) through screw threads, one ends of two said screws (20) are rotatably connected with the inner side of the supporting shell (18), one ends of two screws (20) are fixed with bevel screw gears (21), one side of the supporting shell (18) is located at the middle position and rotatably inserted with an adjusting shaft (22), one end of the adjusting shaft (22) is fixed with a driving bevel gear (23), two first bevel gears (24) are symmetrically arranged on two sides of the driving bevel gear (23), two said first bevel gears (24) are engaged with the driving bevel gear (23) through teeth, and one end of each of the two first bevel gears (24) is fixed with a transmission shaft (25), one end of each of the two transmission shafts (25) is fixed with a second bevel gear (26), and the two second bevel gears (26) are meshed with the two screw bevel gears (21) through teeth.

5. A device for the post-operative recovery from neurosurgery department according to claim 4, characterized in that the two telescopic supporting rods (19) are fixed at one end with a antiskid plate (28), and the two antiskid plates (28) are made of rubber.

6. A device for post-operative recovery from neurosurgery according to claim 4, characterized in that the outer sides of said two transmission shafts (25) are symmetrically and rotatably sleeved with two support plates (27) in both end positions, four support plates (27) being fixed to the inner side of the support shell (18).

7. The post-operative recovery apparatus for neurosurgery department according to claim 1 characterized in that two moving wheels are symmetrically and rotatably connected to both sides of the bottom plate (1) at both ends, and storage boxes are arranged at both ends of the upper side of the bottom plate (1).

8. The post-operative recovery apparatus for neurosurgery department according to claim 1 characterized in that four sleeves (35) are fixed on the upper side of the bottom plate (1) at the middle position, the four sleeves (35) are arranged in a rectangular shape, the upper ends of the four sleeves (35) are slidably inserted with telescopic guide rods (36), and the top ends of the four telescopic guide rods (36) are fixed with the lower side of the transverse plate (4).

9. A post-operative recovery apparatus for neurosurgery according to claim 1, characterized in that each of said four lifting rods (11) has a stabilizing plate (37) fixed to one end thereof, said four stabilizing plates (37) being slidably connected to the inner sides of said four fixing rods (10), respectively.