CN112386293A

CN112386293A - Retractor fixer for neurosurgery

Info

Publication number: CN112386293A
Application number: CN202011309313.7A
Authority: CN
Inventors: 孙远朋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-02-23

Abstract

The invention discloses a neurosurgery drag hook fixer, belonging to the technical field of drag hook fixers and comprising a fixing frame, four corners of the bottom of the fixed frame are fixedly connected with supporting legs, the middle parts of the outer side walls of the supporting legs are fixedly connected with supporting rods, the middle part of the support rod is provided with a screw hole and is detachably connected with the transverse adjusting rod through the screw hole, the head part of the transverse adjusting rod is welded with a plum blossom buckle A, the tail part of the transverse adjusting rod is welded with an adjusting seat, the inner side wall of the adjusting seat is provided with an internal thread and is detachably connected with the vertical adjusting rod through the internal thread and the external thread, the top of the vertical adjusting rod is fixedly connected with a plum blossom buckle B, the bottom of the neurosurgery drag hook fixer is connected by adopting two magnet stones with opposite magnetic poles and matched with a tenon-and-mortise connection mode, the connection is stable, the installation and the disassembly are convenient, and the neurosurgery drag hook fixer is convenient for adjusting the pulling depth and the pulling area of the drag hook.

Description

Retractor fixer for neurosurgery

Technical Field

The invention relates to the technical field of retractor holders, in particular to a retractor holder for neurosurgery.

Background

The drag hook is generally used in the operation, the good exposure of the surgical field is the precondition for successfully and smoothly completing various neurosurgery operations, most open operations are completed by means of the operation drag hook, however, the drag hook needs a specially-assigned person to draw and fix all the time in the using process, the operation is very troublesome, and simultaneously, the great work difficulty is increased for medical staff, so that the workload of the medical staff can be reduced while the operation success is increased.

The utility model discloses a neurosurgery drag hook fixer in 201921432588.2, unscrewed thread fixing pole and slide along "L" type sliding chamber and make L type sliding block slide along with L type sliding block, and then can adjust the position of drag hook in the horizontal direction, and then nimble carry out the drag hook to the patient affected part, rotate two threaded rods of base with one side to the arc carries out altitude mixture control along the threaded rod, consequently is convenient for adjust the height of two drag hooks of arc.

The conventional retractor holder has the following disadvantages: 1. the traditional drag hook fixer is inconvenient to detach and install in emergency, is very troublesome, delays treatment time and increases medical risk rate; 2. the traditional draw hook fixer is inconvenient for adjusting the drawing depth and the drawing area of the draw hook, and only the area of a wound can be drawn, so that the traditional draw hook fixer is very inconvenient; therefore, a retractor fixer for neurosurgery is provided.

Disclosure of Invention

The invention provides a neurosurgery retractor fixer, the bottom of the neurosurgery retractor fixer adopts a mode that two magnet stones with opposite magnetic poles are connected and matched with a mortise-tenon joint, the connection is stable and the installation and the disassembly are convenient, when the retractor fixer is required to be installed, firstly, an installation plate is installed on two sides of the top of a sickbed through a bolt and a screw hole according to a fixed distance, then, a tenon at the bottom of an upper clamping seat at the bottom of a supporting leg of the retractor fixer is inserted into a mortise at the top of a lower clamping seat, because the bottom of the upper clamping seat is fixedly connected with a magnet stone plate A, the top of the lower clamping seat is fixedly connected with a magnet stone B, the magnet stone plate A and the magnet stone B have opposite magnetic poles, the surfaces of the magnet stone plate A and the magnet stone B are both provided with raised grains and are in adaptive connection through the raised grains, the magnet stone has opposite suction properties, and the unique raised and concave-convex, the tenon and the mortise play roles of positioning and further preventing slippage, when the drag hook fixer needs to be removed in an emergency, the drag hook fixer is directly taken down from the top of the mounting plate and the lower clamping seat, so that the mounting and the dismounting are convenient, the neurosurgical drag hook fixer of the invention is convenient for adjusting the pulling depth and the pulling area of the drag hook, when the wound needing to be pulled is too deep, the hand-held plum blossom button B rotates clockwise, the drag hooks at the bottom of the vertical adjusting rod and the vertical adjusting rod move downwards until the drag hook reaches the wound of a patient, when the wound needing to be pulled is too shallow, the hand-held plum blossom button B rotates anticlockwise, the drag hook at the bottom of the vertical adjusting rod and the vertical adjusting rod moves upwards until the drag hook reaches the wound of the patient, the plum blossom button A is twisted clockwise before the pulling, the transverse adjusting rod rotates in the screw hole in the middle part of the supporting rod, the drag hooks at both sides stretch the, the quincuncial buckle B is rotated anticlockwise, the transverse adjusting rod rotates in the screw hole in the middle of the supporting rod, and the drag hooks on the two sides are far away from the screw hole to prop open the wound of the patient.

The specific technical scheme provided by the invention is as follows:

the invention provides a neurosurgery drag hook fixer, which comprises a fixing frame, wherein supporting legs are fixedly connected at four corners of the bottom of the fixing frame, a supporting rod is fixedly connected at the middle part of the outer side wall of each supporting leg, a screw hole is formed in the middle part of each supporting rod and is detachably connected with a transverse adjusting rod through the screw hole, a quincuncial buckle A is welded at the head part of each transverse adjusting rod, an adjusting seat is welded at the tail part of each transverse adjusting rod, an internal thread is formed in the inner side wall of each adjusting seat and is detachably connected with a vertical adjusting rod through the internal thread and the external thread, a quincuncial buckle B is fixedly connected at the top part of each vertical adjusting rod, a drag hook is fixedly connected at the bottom part of each vertical adjusting rod, an upper clamping seat is fixedly connected at the bottom part of each supporting leg, an iron-absorbing, the middle of the top of the lower clamping seat is provided with a mortise.

Optionally, the supporting leg includes skin and inner core, inner core lateral wall fixedly connected with skin.

Optionally, the inner core is made of an aluminum alloy material, and the outer layer is made of an acrylic material.

Optionally, the outer side walls of the quincuncial button A and the quincuncial button B are both bonded with rubber layers.

Optionally, the magnet stone plate a and the magnet stone B have opposite magnetic poles.

Optionally, the surfaces of the iron absorption stone plate A and the iron absorption stone plate B are both provided with wavy grains.

Optionally, the outer side wall of the lower clamping seat is fixedly connected with a mounting plate, a screw hole is formed in the surface of the mounting plate, and the mounting plate is detachably connected with the bed surface through the screw hole and a bolt.

The invention has the following beneficial effects:

the embodiment of the invention provides a retractor fixer for neurosurgery:

1. the bottom of the retractor fixer for neurosurgery of the invention adopts a mode that two pieces of magnet with opposite magnetic poles are connected and matched with tenon-and-mortise connection, the connection is stable and the installation and the disassembly are convenient, when the retractor fixer is needed to be installed, firstly, the installation plate is installed on both sides of the top of a sickbed through bolts and screw holes according to a fixed distance, then, the tenon at the bottom of the upper clamping seat at the bottom of the supporting leg of the retractor fixer is inserted into the mortise at the top of the lower clamping seat, because the bottom of the upper clamping seat is fixedly connected with the magnet slab A, the top of the lower clamping seat is fixedly connected with the magnet slab B, the magnetic poles of the magnet slab A and the magnet slab B are opposite, the surfaces of the magnet slab A and the magnet slab B are both provided with raised grains and are connected through the raised grains, the magnet has the property of opposite attraction, the unique concave-convex structure of the raised grains can prevent the upper clamping seat from sliding at the, when the drag hook fixer is urgently dismantled, the drag hook fixer is directly taken down from the mounting panel and the lower clamping seat top, the convenient installation and the disassembly solve the problem of inconvenient urgent dismantlement, inconvenient installation of traditional drag hook fixer when emergency.

2. The neurosurgery draw hook fixer of the invention is convenient to adjust the drawing depth and the drawing area of the draw hook, when the wound to be pulled is too deep, the hand-held plum blossom buckle B rotates clockwise, the vertical adjusting rod and the drag hook at the bottom of the vertical adjusting rod move downwards until the drag hook reaches the wound of a patient, when the wound that needs draw to get is too shallow, B anticlockwise rotation is detained to handheld plum blossom, erect and adjust the pole and erect the drag hook upward displacement of adjusting the pole bottom, reach patient's wound until the drag hook, draw and twist clockwise before getting and move the plum blossom and detain A, the horizontal adjusting pole rotates in the screw at bracing piece middle part, the drag hook of both sides is pressed close to, the drag hook group that will press close to stretches into patient's wound, B is detained to the anticlockwise rotation plum blossom, the horizontal adjusting pole rotates in the screw at bracing piece middle part, the drag hook of both sides is kept away from, strut patient's wound, solve traditional drag hook fixer inconvenient regulation drag hook draw get the degree of depth and draw the problem.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of a retractor holder for neurosurgery according to an embodiment of the present invention;

FIG. 2 is a top view of a retractor holder according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a quincuncial buckle of a neurosurgical retractor holder according to an embodiment of the invention.

In the figure: 1. supporting legs; 101. an outer layer; 102. an inner core; 2. a quincuncial buckle A; 3. a transverse adjusting rod; 4. mounting a plate; 5. a bolt; 6. a screw hole; 7. an upper clamping seat; 8. a tenon; 9. mortises; 10. a lower clamping seat; 11. pulling a hook; 12. a vertical adjusting rod; 13. an adjusting seat; 14. an internal thread; 15. an external thread; 16. a fixing frame; 17. a quincuncial buckle B; 18. a magnet slab A; 19. a magnet B; 20. wave lines; 21. a support bar; 22. a rubber layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, 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.

A neurosurgical retractor holder according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 3.

Referring to fig. 1, 2 and 3, the neurosurgery retractor fixer provided by the embodiment of the invention comprises a fixing frame 16, wherein four corners of the bottom of the fixing frame 16 are fixedly connected with supporting legs 1, the middle parts of the outer side walls of the supporting legs 1 are fixedly connected with supporting rods 21, the middle parts of the supporting rods 21 are provided with screw holes 6 and are detachably connected with a transverse adjusting rod 3 through the screw holes 6, the head parts of the transverse adjusting rod 3 are welded with quincuncial fasteners A2, the tail parts of the transverse adjusting rod 3 are welded with adjusting seats 13, the inner side walls of the adjusting seats 13 are provided with internal threads 14 and are detachably connected with a vertical adjusting rod 12 through the internal threads 14 and the external threads 15, the top parts of the vertical adjusting rod 12 are fixedly connected with quincuncial fasteners B17, the bottom parts of the vertical adjusting rod 12 are fixedly connected with a retractor 11, the bottom, the middle of the bottom of the upper clamping seat 7 is fixedly connected with a tenon 8, the bottom of the upper clamping seat 7 is connected with the top of the lower clamping seat 10, the top of the lower clamping seat 10 is fixedly connected with a magnet B19, and a mortise 9 is arranged in the middle of the top of the lower clamping seat 10.

Illustratively, the bottom of the neurosurgery draw hook fixer of the invention adopts a mode that two magnet stones with opposite magnetic poles are connected and matched with a mortise-tenon joint, the connection is stable and the installation and the disassembly are convenient, when the draw hook fixer is required to be installed, firstly, the installation plate 4 is installed at two sides of the top of a sickbed according to a fixed distance through the bolt 5 and the screw hole 6, then the tenon 8 at the bottom of the upper clamping seat 7 at the bottom of the supporting leg 1 of the draw hook fixer is inserted into the mortise 9 at the top of the lower clamping seat 10, because the bottom of the upper clamping seat 7 is fixedly connected with the magnet stone plate A18, the top of the lower clamping seat 10 is fixedly connected with the magnet stone B19, the magnet stone plate A18 and the magnet stone B19 have opposite magnetic poles, the surfaces of the magnet stone plate A18 and the magnet stone B19 are both provided with the raised grains 20 which are adaptive connected through the raised grains 20, the magnet has the property of opposite attraction, and the unique, the tenon 8 and the mortise 9 play roles of positioning and further preventing slippage, when the drag hook fixer needs to be removed urgently, the drag hook fixer is directly taken down from the tops of the mounting plate 4 and the lower clamping seat 10, so that the mounting and the dismounting are convenient, the neurosurgery drag hook fixer of the invention conveniently adjusts the pulling depth and the pulling area of the drag hook, when the wound needing to be pulled is too deep, the handheld plum blossom buckle B17 rotates clockwise, the drag hook 11 at the bottom of the vertical adjusting rod 12 and the vertical adjusting rod 12 moves downwards until the drag hook 11 reaches the wound of a patient, when the wound needing to be pulled is too shallow, the handheld plum blossom buckle B17 rotates anticlockwise, the drag hook 11 at the bottom of the vertical adjusting rod 12 and the vertical adjusting rod 12 moves upwards until the drag hook 11 reaches the wound of the patient, the plum blossom buckle A2 is twisted clockwise before the pulling, the transverse adjusting rod 3 rotates in the screw hole 6 in the middle part of the supporting rod 21, and the drag hooks 11 at both sides, the group of the attached draw hooks 11 extends into the wound of the patient, the quincuncial buckle B17 rotates anticlockwise, the transverse adjusting rod 3 rotates in the screw hole 6 in the middle of the supporting rod 21, and the draw hooks 11 on the two sides are far away from the wound of the patient.

Referring to fig. 1, the supporting leg 1 comprises an outer layer 101 and an inner core 102, wherein the outer side wall of the inner core 102 is fixedly connected with the outer layer 101.

The outer layer 101 is fixedly connected to the outer side wall of the inner core 102 of the supporting leg 1, so that the supporting leg 1 is convenient to work, the inner core 102 can support the outer layer 101, the structural strength of the outer layer 101 is improved, the structural strength of the supporting leg 1 is improved, and the service life of the whole device is prolonged.

Referring to fig. 1, the inner core 102 is made of an aluminum alloy, and the outer layer 101 is made of an acrylic material.

Illustratively, the inner core 102 is made of aluminum alloy, and aluminum alloy density is low, but intensity is higher, and is close to or surpasses high-quality steel, and the plasticity is good, can process into various section bars, has good electric conductivity, heat conductivity and corrosion resistance, and is comparatively hard, can increase the structural strength of supporting leg 1, and outer layer 101 is made of acrylic material, acrylic, also called PMMA or organic glass, has better transparency, chemical stability and weatherability, easy dyeing, easy processing, the outward appearance is graceful, does not shelter from patient's wound, does not influence observation patient wound internal conditions, is convenient for rescue patient.

Referring to fig. 1 and 3, the rubber layer 22 is adhered to the outer side wall of each of the quincuncial button a2 and the quincuncial button B17.

In the example, the rubber layer 22 is adhered to the outer side walls of the quincuncial button A2 and the quincuncial button B17, the quincuncial button A2 and the quincuncial button B17 are in a six-petal quincuncial shape, the unique quincuncial shape is good in anti-skidding effect and convenient to twist, the rubber layer 22 is soft and elastic, and can rebound rapidly under the normal temperature and increase the using comfort.

Referring to fig. 1, the magnet plate a18 and the magnet B19 have opposite poles.

For example, the magnet plate a18 has opposite poles to the magnet plate B19, the magnet is an object that attracts iron and generates a magnetic field outside, the magnet in the narrow sense means an article of magnetite, the magnet in the broad sense means an object or device that is used to generate a magnetic field, the magnet serves as a magnetic dipole capable of attracting ferromagnetic substances such as iron, nickel, cobalt and the like, the magnetic pole is determined by suspending a magnet in a thin line, the magnetic pole pointing north is called north or N, the magnetic pole pointing south is south or S, (if the earth is thought to be a large magnet, the earth' S geomagnetic north is now S, the geomagnetic south is N) the opposite pole of the magnet, the like pole is repelled, the south pole is attracted to the south pole, the north pole is repelled from the north pole, the magnet is pressed with ferroferric oxide powder and a filler and an adhesive, some of the magnet are strong in magnetism, the magnetic material contains more Fe3O4, has weak magnetism and less Fe3O4, most of the materials are composed of molecules, the molecules are composed of atoms, the atoms are composed of atomic nuclei and electrons, the electrons continuously rotate inside the atoms and rotate around the atomic nuclei, the two motions of the electrons can generate magnetism, but in most of the materials, the directions of the electron motions are different and are disordered, and the magnetic effects are mutually counteracted, so that most of the materials do not have magnetism under normal conditions.

Referring to fig. 1, the raised grains 20 are formed on the surfaces of the magnet slab a18 and the magnet slab B19.

For example, the raised grains 20 are formed on the surfaces of the iron-absorbing stone plate A18 and the iron-absorbing stone plate B19, and the unique concave-convex structure of the raised grains can prevent the upper clamping seat 7 from sliding on the top of the lower clamping seat 10.

Referring to fig. 1, a mounting plate 4 is fixedly connected to an outer side wall of the lower clamping seat 10, and a screw hole 6 is formed in the surface of the mounting plate 4 and detachably connected to a bed surface through the screw hole 6 and a bolt 5.

In the example, the mounting plate 4 is fixedly connected to the outer side wall of the lower clamping seat 10, the surface of the mounting plate 4 is provided with a screw hole 6 and is detachably connected with the bed surface through the screw hole 6 and a bolt 5, and the threaded connection mode is stable and convenient to mount and dismount.

When the retractor fixer is used, when the retractor fixer is required to be installed, the installation plate 4 is installed on two sides of the top of a sickbed according to a fixed distance through the bolt 5 and the screw hole 6, then the tenon 8 at the bottom of the upper clamping seat 7 at the bottom of the supporting leg 1 of the retractor fixer is inserted into the mortise 9 at the top of the lower clamping seat 10, the bottom of the upper clamping seat 7 is fixedly connected with the magnet-attracted stone plate A18, the top of the lower clamping seat 10 is fixedly connected with the magnet-attracted stone B19, the magnet-attracted stone plate A18 and the magnet-attracted stone B19 have opposite magnetic poles, the magnet can attract iron and generate a magnetic field outside the magnet, the narrowly defined magnet refers to a product of magnet ore, the generalized magnet refers to an object or a device for generating a magnetic field, the magnet serves as a magnet dipole and can attract ferromagnetic substances such as metals such as iron, nickel, cobalt and the magnetic pole is judged by hanging a magnet with a thin wire, the magnetic pole pointing, (if the earth is thought to be a big magnet, the earth' S geomagnetic north pole is S pole and the geomagnetic south pole is N pole at present.) the opposite poles of the magnet attract each other, the same pole repel each other, the south pole attracts each other, the south pole repels each other, the north pole repels each other, the magnet is formed by pressing ferroferric oxide powder, a filler and a binder, some magnets are strong in magnetism, contain more Fe3O4, have weak magnetism and contain less Fe3O4, substances are mostly composed of molecules, the molecules are composed of atoms, the atoms are composed of atomic nucleus and electrons, the electrons rotate around the atomic nucleus continuously in the atomic nucleus, the two movements of the electrons generate magnetism, but in most substances, the directions of the electron movements are different and have no disorder, the magnetic effects are mutually offset, therefore, most substances do not display magnetism under normal conditions, the surfaces of the iron-absorbing stone plate A18 and the iron-absorbing stone B19 are both provided with the raised grains 20 and are in adaptive connection through the raised grains 20, the iron-absorbing stone has the property of opposite attraction, the unique concave-convex structure of the raised grains can prevent the upper clamping seat 7 from sliding on the top of the lower clamping seat 10, the tenon 8 and the mortise 9 play roles in positioning and further preventing sliding, when the hook fixator is required to be emergently dismantled, the hook fixator is directly taken down from the tops of the mounting plate 4 and the lower clamping seat 10, the installation and the disassembly are convenient, when the wound required to be drawn is too deep, the handheld plum blossom buckle B17 rotates clockwise, the drag hooks 11 at the bottoms of the vertical adjusting rod 12 and the vertical adjusting rod 12 displace downwards until the drag hooks 11 reach the wound of a patient, when the wound required to be drawn is too shallow, the handheld plum blossom buckle B17 rotates, the drag hooks 11 at the bottoms of the vertical adjusting rod 12 and the vertical adjusting rod 12 displace upwards until the drag hooks 11 reach the wound of, draw and twist clockwise before getting and move plum blossom knot A2, horizontal adjusting rod 3 rotates in the screw 6 at bracing piece 21 middle part, and the drag hook 11 of both sides is pressed close to, and the drag hook 11 group that will press close to stretches into patient's wound, and B17 is detained to anticlockwise rotation plum blossom, and horizontal adjusting rod 3 rotates in the screw 6 at bracing piece 21 middle part, and the drag hook 11 of both sides is kept away from, struts patient's wound.

The invention relates to a retractor fixer for neurosurgery, which comprises a supporting leg and a supporting leg, wherein the supporting leg comprises a base and a supporting leg; 101. an outer layer; 102. an inner core; 2. a quincuncial buckle A; 3. a transverse adjusting rod; 4. mounting a plate; 5. a bolt; 6. a screw hole; 7. an upper clamping seat; 8. a tenon; 9. mortises; 10. a lower clamping seat; 11. pulling a hook; 12. a vertical adjusting rod; 13. an adjusting seat; 14. an internal thread; 15. an external thread; 16. a fixing frame; 17. a quincuncial buckle B; 18. a magnet slab A; 19. a magnet B; 20. wave lines; 21. a support bar; 22. the rubber layers and components are all standard parts or components known to those skilled in the art, and the structure and principle of the rubber layers and components are known to those skilled in the art through technical manuals or through routine experiments.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. The utility model provides a neurosurgery drag hook fixer, includes fixed frame (16), its characterized in that, fixed frame (16) bottom four corners fixedly connected with supporting leg (1), supporting leg (1) lateral wall middle part fixedly connected with bracing piece (21), screw (6) have been seted up at bracing piece (21) middle part and can be dismantled with horizontal adjusting lever (3) through screw (6) and be connected, the welding of horizontal adjusting lever (3) prelude has the plum blossom to detain A (2), the welding of horizontal adjusting lever (3) afterbody has regulation seat (13), adjust seat (13) inside wall and set up internal thread (14) and can dismantle with perpendicular adjusting lever (12) through internal thread (14) and external screw thread (15) and be connected, erect adjusting lever (12) top fixedly connected with plum blossom and detain B (17), erect adjusting lever (12) bottom fixedly connected with drag hook (11), the support leg (1) bottom fixedly connected with goes up cassette (7), go up cassette (7) bottom fixedly connected with magnet slabstone A (18), go up fixedly connected with tenon (8) in the middle of cassette (7) bottom, it is connected with lower cassette (10) top to go up cassette (7) bottom, lower cassette (10) top fixedly connected with magnet B (19), mortise (9) have been seted up in the middle of lower cassette (10) top.

2. A retractor holder as claimed in claim 1 wherein the support leg (1) comprises an outer layer (101) and an inner core (102), the outer side wall of the inner core (102) being fixedly connected to the outer layer (101).

3. A retractor holder as claimed in claim 2 wherein said inner core (102) is formed of an aluminum alloy and said outer layer (101) is formed of acrylic.

4. The neurosurgical retractor fixer as claimed in claim 1, wherein the outer side walls of said buckle A (2) and buckle B (17) are adhered with rubber layer (22).

5. A retractor holder as claimed in claim 1 wherein said magnet plate a (18) and magnet plate B (19) are of opposite polarity.

6. The neurosurgical retractor fixator according to claim 1, wherein the surface of the magnet stone plate A (18) and the surface of the magnet stone plate B (19) are both provided with raised grains (20).

7. The neurosurgery drag hook fixer according to claim 1, characterized in that the outer side wall of the lower clamping seat (10) is fixedly connected with a mounting plate (4), the surface of the mounting plate (4) is provided with a screw hole (6) and is detachably connected with a bed surface through the screw hole (6) and a bolt (5).