CN114432533A

CN114432533A - Adjustable bracket platform for patient transfusion

Info

Publication number: CN114432533A
Application number: CN202210237861.6A
Authority: CN
Inventors: 匡名洋; 张国英; 王传霞
Original assignee: Shandong Provincial Hospital Affiliated to Shandong First Medical University
Current assignee: Shandong Provincial Hospital Affiliated to Shandong First Medical University
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-05-06

Abstract

The invention relates to the technical field of medical instruments, in particular to an adjustable patient infusion support platform which comprises a base, a fixed rod, a telescopic hollow rod, a bottle hanging unit and an infusion heating unit, wherein the fixed rod is fixedly connected with the base; the existing infusion support has the following problems: the infusion support needs to be placed on the ground for use, so that the infusion support is inconvenient to place on the ground of a hospital when a large number of patients need to be infused and the site of the hospital is limited; the infusion support cannot be fixed when placed on the ground, is lack of stability in the use process, and is easy to topple if being collided, so that potential safety hazards are caused; the bottle hanging unit can be stably fixed on the ceiling, so that the transfusion stand is inconvenient to place on the ground, and the transfusion can be realized; according to the invention, the pressing type sucker arranged below the base is attached to the ground, so that the stability of the invention in a static state can be ensured.

Description

Adjustable bracket platform for patient transfusion

Technical Field

The invention relates to the technical field of medical instruments, in particular to an adjustable support table for patient transfusion.

Background

The infusion support is widely applied to clinical treatment, and the common infusion support is multipurpose for patient infusion, promotes liquid medicine to enter the body of a patient, and provides convenience for the patient to infuse.

At present, infusion supports used in most domestic hospitals are simple in structure and only hang liquid medicine on the infusion supports, so that the existing infusion supports still have the following problems: 1. the existing infusion support needs to be placed on the ground for use, and if a large number of patients need to be infused, and the hospital is limited in place, the infusion support is inconvenient to place on the ground of the hospital, so that the patients cannot be infused in time.

2. The existing infusion support cannot be fixed when placed on the ground, so that the infusion support lacks stability in the using process, and if the infusion support collides, the infusion support is easy to topple, so that potential safety hazards are caused.

Disclosure of Invention

In order to solve the problems, the invention provides an adjustable support stand for patient infusion, which comprises a base, a fixed rod, a telescopic hollow rod, a bottle hanging unit and an infusion heating unit, wherein the fixed rod is arranged at the upper end of the base, the telescopic hollow rod is positioned above the fixed rod, the telescopic hollow rod is inserted into the upper side of the fixed rod in a threaded connection mode, the bottle hanging unit is positioned at the upper end of the telescopic hollow rod, and the infusion heating unit is arranged on the telescopic hollow rod and is positioned below the bottle hanging unit.

Hang bottle unit and include adjustable couple device, cylinder sleeve, accomodate basket, sucking disc safety cover, circular disk, bracing piece, support frame and threaded rod and sucking disc, wherein: the telescopic hollow rod is characterized in that a cylindrical sleeve is sleeved on the upper side of the telescopic hollow rod in a detachable sliding manner, four storage baskets are uniformly and circumferentially arranged on the outer side wall of the cylindrical sleeve through supporting rods, a circular disc is arranged at the upper end of the cylindrical sleeve, adjustable hook devices are uniformly arranged in the circular disc, four supporting frames are uniformly and circumferentially arranged at the upper end of the circular disc, one ends of the four supporting frames, which are far away from the circular disc, are jointly provided with a sucker protective cover, and the upper end of a threaded rod penetrates through the sucker protective cover to be provided with a sucker; in addition, the invention can ensure the stability of the transfusion bottle through the storage basket when moving, and avoid the collision with the outside, thereby improving the safety of the transfusion bottle; the bottle hanging unit can be stably fixed on the ceiling according to different use scenes through the sucking disc.

The base includes movable chassis, balancing weight, aerifys gasbag, circular bottom plate and push type sucking disc, wherein: the lower end of the fixed rod is provided with a balancing weight, the lower end of the balancing weight is provided with an inflatable air bag, the outer side of the balancing weight is provided with a movable underframe, a circular bottom plate is arranged below the inflatable air bag, and four pressing type suckers are uniformly arranged at the lower end of the circular bottom plate in the circumferential direction; the pressing type sucker is attached to the ground through the circular bottom plate by the inflatable air bag through inflation in the inflatable air bag, and the gravity applied to the base by the balancing weight is matched, so that the stability of the electric vacuum cleaner in a static state can be ensured.

As a preferred technical scheme of the invention, the adjustable hook device comprises a limiting pin, a spring and a hook, wherein: four hooks corresponding to the positions of the storage baskets are installed on the outer side wall of the circular disc at equal intervals in the circumferential direction, the hooks are inserted on the circular disc in a sliding mode, a plurality of semicircular clamping grooves are formed in the upper side of each hook, limiting pins corresponding to the positions of the hooks are evenly installed on the upper end of the circular disc in the circumferential direction, the limiting pins penetrate through the circular disc and then abut against the semicircular clamping grooves of the hooks in a sliding mode, and the limiting pins are connected with the upper end face of the circular disc through springs; the hanging bottles with different diameters can be hung by adjusting the extending length of the hook, and the collision between the hanging bottles and the cylindrical sleeve is prevented.

As a preferred technical scheme of the invention, the outer side wall of the telescopic hollow rod is provided with an infusion heating unit which comprises a containing box, a ball hinge and a supporting sleeve, wherein: the outer wall of the telescopic hollow rod is slidably sleeved with a supporting sleeve in an adjustable mode, ball hinges are uniformly arranged on the outer wall of the supporting sleeve in the circumferential direction, accommodating boxes are mounted on the ball hinges, an accommodating groove is formed in one side, away from the ball hinges, of each accommodating box, the accommodating groove is U-shaped, and an infusion heating bag is detachably mounted in each accommodating box; the liquid medicine in the infusion tube passing through the accommodating groove can be heated through the infusion heating bag, so that the liquid medicine is heated to the temperature relatively suitable for the human body, and the cold liquid is prevented from being directly input into the blood vessel to cause discomfort of the human body.

As a preferred technical scheme of the present invention, the movable chassis includes chassis feet, universal wheels, and a cylinder storage box, wherein: four underframe feet are uniformly arranged on the outer wall of the balancing weight in the circumferential direction, universal wheels are mounted at the ends, far away from the balancing weight, of the four underframe feet, and an inflator storage box is arranged between any two adjacent underframe feet; the four-wheel-type movable trolley is convenient to move through the four underframe feet and the universal wheels.

As a preferable technical scheme of the invention, a tray is sleeved on the outer wall of the upper side of the fixed rod through a bearing, and a storage basket is arranged on any side of the bottom of the tray.

As a preferred technical scheme of the invention, an object placing table is arranged at the upper end of the tray and at one side far away from the storage basket, and a plurality of J-shaped hooks are arranged on the circumferential surface of the tray at one side far away from the storage basket at equal intervals; through the storing basket, put thing platform and J-shaped hook and can place different medicine and medical article according to practical application, in addition, put the thing dish through the manual rotation of J-shaped hook to change the position of storing basket and putting the thing platform, be convenient for take medical article or medicine.

As a preferred technical scheme of the invention, a pedal inflator is arranged in the inflator storage box, and the air outlet end of the pedal inflator is communicated with the inflatable air bag.

As a preferred technical scheme of the invention, a threaded rod penetrates through the center of the bottom of the sucker protection cover in a thread fit mode, a sucker is installed at the upper end of the threaded rod after penetrating through the sucker protection cover, and the lower end of the threaded rod penetrates through the circular disc and the cylindrical sleeve in sequence and then is inserted into the telescopic hollow rod in a thread connection mode; air in the suction cup can be exhausted through the threaded rod, so that the suction cup is more firmly adsorbed on a ceiling.

The invention has the beneficial effects that: 1. the hanging bottle unit can place the hanging bottle in the storage basket, so that the stability of the hanging bottle is ensured, the hanging bottle is prevented from colliding with the outside, and the safety of the hanging bottle is improved; the bottle hanging unit can be stably fixed on the ceiling, so that the hanging bottles can be hung on the bottle hanging unit according to different use scenes; the pressing type sucker is attached to the ground, and the gravity applied to the base by the balancing weight is matched, so that the stability of the device in a static state can be ensured.

2. The invention can hang the infusion bottles with different diameters by adjusting the extension length of the hook, thereby preventing the infusion bottles from colliding with the cylindrical sleeve.

3. The infusion heating bag arranged in the accommodating box can heat the liquid medicine in the infusion tube penetrating through the accommodating groove, so that the liquid medicine is heated to a temperature which is relatively suitable for a human body, and cold liquid is prevented from being directly infused into a blood vessel to cause discomfort of the human body.

4. Different medicines and medical articles can be placed according to practical application through the storage basket, the object placing table and the J-shaped hook, and in addition, the object placing disc is manually rotated through the J-shaped hook so as to change the positions of the storage basket and the object placing table, so that the medical articles or the medicines can be conveniently taken.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of the base of the present invention.

Fig. 3 is a partial enlarged view of the invention at Y of fig. 2.

Fig. 4 is a schematic perspective view of the bottle hanging unit of the present invention.

Fig. 5 is a cross-sectional view (from front to back) of the bottle hanging unit of the present invention.

Fig. 6 is a partial enlarged view at X of fig. 5 of the present invention.

Fig. 7 is a sectional view (from above to below) of the infusion heating unit of the invention.

In the figure: 1. a base; 11. a movable chassis; 111. a chassis foot; 112. a universal wheel; 113. an inflator storage box; 12. a balancing weight; 13. an inflatable air bag; 14. a circular base plate; 15. a pressing type sucker; 2. fixing the rod; 3. a telescopic hollow rod; 4. a bottle hanging unit; 41. an adjustable hook device; 411. a spacing pin; 412. a spring; 413. hooking; 42. a cylindrical sleeve; 43. a storage basket; 44. a sucker protecting cover; 45. a circular disc; 46. a support bar; 47. a support frame; 48. a threaded rod; 49. a suction cup; 5. a transfusion heating unit; 51. an accommodating box; 52. a ball hinge; 53. a support sleeve; 61. a tray; 62. a J-shaped hook; 63. a storage basket; 64. a storage table.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring to fig. 1, an adjustable support stand for patient transfusion comprises a base 1, a fixed rod 2, a telescopic hollow rod 3, a bottle hanging unit 4 and a transfusion heating unit 5; the upper end of the base 1 is provided with a fixed rod 2, the telescopic hollow rod 3 is inserted at the upper side of the fixed rod 2 in a threaded connection mode, and the bottle hanging unit 4 is positioned at the upper end of the telescopic hollow rod 3; the transfusion heating unit 5 is arranged on the telescopic hollow rod 3 and is positioned below the bottle hanging unit 4, and the height of the bottle hanging unit 4 can be adjusted by rotating the telescopic hollow rod 3.

Referring to fig. 4 and 5, the bottle hanging unit 4 includes an adjustable hooking device 41, a cylindrical sleeve 42, a storage basket 43, a suction cup protection cover 44, a circular disc 45, a support rod 46, a support bracket 47 and a threaded rod 48, wherein: the cylindrical sleeve 42 is sleeved on the upper side of the telescopic hollow rod 3 in a detachable sliding manner, four storage baskets 43 are uniformly and circumferentially arranged on the outer side wall of the cylindrical sleeve 42 through a support rod 46, a circular disc 45 is arranged at the upper end of the cylindrical sleeve 42, adjustable hook devices 41 are uniformly arranged in the circular disc 45, four support frames 47 are uniformly and circumferentially arranged at the upper end of the circular disc 45, and a suction cup protection cover 44 is commonly arranged at one end, far away from the circular disc 45, of each support frame 47; a threaded rod 48 penetrates through the center of the bottom of the suction cup protection cover 44 in a threaded matching mode, a suction cup 49 is mounted at the upper end of the threaded rod 48 after penetrating through the suction cup protection cover 44, and the lower end of the threaded rod 48 penetrates through the circular disc 45 and the cylindrical sleeve 42 in sequence in a threaded connection mode and then is inserted into the telescopic hollow rod 3; the lower half part of the containing basket 43 is an arc concave surface, the side surface of the containing basket is provided with an opening, and the arc concave surface structure and the opening are convenient for placing a transfusion bottle and enabling a transfusion tube to pass through without obstacle; it should be noted that, if there are many patients to be infused in a hospital and the hospital is limited in place, it is inconvenient for the patients to place an infusion support on the ground during the infusion process, so that the bottle hanging unit 4 can be fixed on the ceiling according to different use scenes by the invention, so as to facilitate the normal infusion of the patients.

Referring to fig. 6, the adjustable hooking device 41 includes a limiting pin 411, a spring 412 and a hook 413, wherein: four hooks 413 corresponding to the position of the storage basket 43 are circumferentially and equidistantly arranged on the outer side wall of the circular disc 45, the hooks 413 are slidably inserted on the circular disc 45, a plurality of semicircular clamping grooves are formed in the upper side of each hook 413, limiting pins 411 corresponding to the positions of the hooks 413 are circumferentially and uniformly arranged at the upper end of the circular disc 45, the limiting pins 411 penetrate through the circular disc 45 and then abut against the semicircular clamping grooves of the hooks 413, and the limiting pins 411 are connected with the upper end face of the circular disc 45 through springs 412; downward contraction force can be applied to the limit pin 411 through the spring 412, so that the limit pin 411 always abuts against the semicircular clamping groove; during specific work, the limiting pin 411 is pulled upwards firstly, so that the limiting pin 411 is pulled out of the semicircular clamping groove, then the hook 413 is adjusted to be in a proper length, then the limiting pin 411 is loosened, the limiting pin 411 abuts against the semicircular clamping groove again to fix the position of the hook 413, then the hanging bottle is hung on the hook 413, and the bottle body is placed in the accommodating basket 43, so that the stability of the hanging bottle in the moving process can be guaranteed; when inconvenient placing the infusion support on ground, pull down cylinder sleeve 42 from flexible hollow rod 3 to with the laminating of sucking disc safety cover 44 on the ceiling, rotate threaded rod 48 again, make threaded rod 48 rebound, the distance between threaded rod 48 and the ceiling reduces this moment, thereby can discharge the inside air of sucking disc 49 through the extrusion force that threaded rod 48 applyed to sucking disc 49, make sucking disc 49 firm absorption on the ceiling, so that still can normally infuse in the inconvenient region of action.

Referring to fig. 1, 2 and 3, the base 1 includes a movable bottom frame 11, a weight block 12, an inflatable air bag 13, a circular bottom plate 14 and a pressing type suction cup 15, wherein: the lower end of the fixed rod 2 is installed on a balancing weight 12, the lower end of the balancing weight 12 is provided with an inflatable air bag 13, the outer side of the inflatable air bag 13 is provided with an air outlet valve, the outer side of the balancing weight 12 is provided with a movable underframe 11, a circular bottom plate 14 is installed below the inflatable air bag 13, and four pressing type suckers 15 are uniformly arranged at the lower end of the circular bottom plate 14 in the circumferential direction; the movable chassis 11 includes chassis feet 111, universal wheels 112 and a cylinder receiver 113, wherein: four underframe feet 111 are uniformly arranged on the outer wall of the balancing weight 12 in the circumferential direction, universal wheels 112 are mounted at one ends, far away from the balancing weight 12, of the four underframe feet 111, and an air cylinder storage box 113 is arranged between any two adjacent underframe feet 111; a pedal inflator is arranged in the inflator storage box 113, and the air outlet end of the pedal inflator is communicated with the inflatable air bag 13; when the infusion support works specifically, the infusion support is placed stably, then the inflation air bag 13 is inflated by stepping on the inflator pump with feet, the inflation air bag 13 is supported and the circular bottom plate 14 is extruded downwards, so that the circular bottom plate 14 drives the pressing type sucker 15 to be attached to the ground, and the stability of the infusion support is ensured; if the invention needs to be recovered to the movable state, the gas in the inflatable air bag 13 is discharged by opening the gas outlet valve on the inflatable air bag 13, so that the inflatable air bag 13 contracts and drives the pressing type suction cup 15 to be separated from the ground through the round bottom plate 14.

Referring to fig. 7, the infusion heating unit 5 includes a housing box 51, a ball hinge 52, and a support sleeve 53, wherein: the outer wall of the telescopic hollow rod 3 is slidably sleeved with a supporting sleeve 53 in an adjustable mode, ball hinges 52 are uniformly arranged on the outer wall of the supporting sleeve 53 in the circumferential direction, accommodating boxes 51 are mounted on the ball hinges 52, an accommodating groove is formed in one side, away from the ball hinges 52, of each accommodating box 51, the accommodating groove is U-shaped and can clamp an infusion tube inside the accommodating box, the infusion tube can be conveniently combed, the infusion tube is prevented from being wound with the outside, and two infusion heating bags are symmetrically mounted inside each accommodating box 51 in a detachable mode; an opening on the upper end face of the accommodating box 51 is provided with an upper cover, the upper cover is tightly clamped after the infusion heating bag is placed into the accommodating box 51, so that the heat loss can be reduced, in addition, the height of the supporting sleeve 53 can be adjusted to be suitable for infusion tubes with different lengths, the accommodating groove is used for limiting the infusion tubes, and the situations that the infusion tubes are wound and the like are avoided; during specific work, the infusion tube is firstly placed in the accommodating box 51, and liquid medicine is heated to the temperature which is relatively suitable for the human body through the infusion heating bag, so that discomfort of the human body caused by direct infusion of cold liquid medicine into blood vessels is avoided.

Referring to fig. 1, a tray 61 is sleeved on the outer wall of the upper side of the fixing rod 2 through a bearing, a storage basket 63 is arranged on any side of the bottom of the tray 61, and the storage basket 63 is fan-shaped; a storage table 64 is arranged at the upper end of the tray 61 and at one side far away from the storage basket 63, and a plurality of J-shaped hooks 62 are arranged on the circumferential surface of the tray 61 at one side far away from the storage basket 63 at equal intervals; different medicines and medical articles can be placed according to practical application through the storage basket 63, the placing table 64 and the J-shaped hook 62, so that the efficiency can be improved.

The invention comprises the following steps: the first step is as follows: the infusion support is stably placed at a designated place, then the inflation air bag 13 is inflated by stepping on the inflator pump with feet, the inflation air bag 13 is supported and extrudes the circular bottom plate 14 downwards, the circular bottom plate 14 drives the pressing type sucker 15 to be attached to the ground, then the telescopic hollow rod 3 is rotated, and the height of the bottle hanging unit 4 is adjusted.

The second step is that: the length of the hook 413 is adjusted, the hook 413 is fixed through the limit pin 411, then the hanging bottle is hung on the hook 413, and the bottle body is placed in the storage basket 43.

The third step: when infusing to the patient, through the height that adjusts support sleeve 53 reaching suitable position, open the upper cover that holds case 51, the bag of heating will infuse is placed and is held in case 51 and chucking upper cover, then with the transfer line joint spacing inside the holding tank and pass.

The fourth step: when the infusion support is inconvenient to place on the ground, the cylindrical sleeve 42 is detached from the telescopic hollow rod 3, the sucker protection cover 44 is attached to the ceiling, the sucker 49 is adsorbed on the ceiling by rotating the threaded rod 48, the bottle hanging unit 4 is fixed on the ceiling, and the infusion bottle is hung on the bottle hanging unit 4.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an adjustable pallet platform of patient's infusion, includes base (1), dead lever (2), flexible hollow rod (3), hangs bottle unit (4) and infusion heating unit (5), its characterized in that: the upper end of the base (1) is provided with a fixed rod (2), the upper side of the fixed rod (2) is inserted with a telescopic hollow rod (3) in a threaded connection mode, a bottle hanging unit (4) and an infusion heating unit (5) are both arranged on the telescopic hollow rod (3), the infusion heating unit (5) is positioned below the bottle hanging unit (4), the bottle hanging unit (4) is positioned at the upper end of the telescopic hollow rod (3), and the infusion heating unit (5) is arranged on the telescopic hollow rod (3) and is positioned below the bottle hanging unit (4); wherein:

hang bottle unit (4) including adjustable couple device (41), cylinder sleeve (42), accomodate basket (43), sucking disc safety cover (44), circular dish (45), bracing piece (46), support frame (47), threaded rod (48) and sucking disc (49), wherein: the telescopic hollow rod is characterized in that the cylindrical sleeve (42) is sleeved on the upper side of the telescopic hollow rod (3) in a sliding manner in a detachable mode, four containing baskets (43) are uniformly and circumferentially arranged on the outer side wall of the cylindrical sleeve (42) through a support rod (46), a circular disc (45) is arranged at the upper end of the cylindrical sleeve (42), adjustable hook devices (41) are uniformly arranged in the circular disc (45), four support frames (47) are uniformly and circumferentially arranged at the upper end of the circular disc (45), and a suction cup protective cover (44) is jointly arranged at one end, far away from the circular disc (45), of each support frame (47); the upper end of the threaded rod (48) is provided with a sucker (49) through the sucker protective cover (44);

base (1) is including joining in marriage movable chassis (11), balancing weight (12), inflatable air bag (13), circular bottom plate (14) and push type sucking disc (15), wherein: the movable type vacuum suction device is characterized in that a balancing weight (12) is installed at the lower end of the fixing rod (2), an inflatable air bag (13) is installed at the lower end of the balancing weight (12), a movable type bottom frame (11) is arranged on the outer side of the balancing weight (12), a circular bottom plate (14) is installed below the inflatable air bag (13), and four pressing type suction discs (15) are evenly arranged on the lower end of the circular bottom plate (14) in the circumferential direction.

2. The adjustable patient infusion support stand of claim 1, wherein: adjustable couple device (41) include spacer pin (411), spring (412) and couple (413), wherein: the utility model discloses a portable storage device, including circular dish (45), couple (413) that circular dish (45) lateral wall circumference equidistant installs four and accomodate basket (43) position phase place correspondences, couple (413) slip grafting is on circular dish (45), a plurality of semi-circular draw-in grooves have been seted up to couple (413) upside, the spacing pin (411) corresponding with couple (413) position phase place are evenly installed to the upper end circumference of circular dish (45), spacing pin (411) are passed behind the circular dish (45) and are supported and lean on in the semi-circular draw-in groove of couple (413), adopt spring (412) to link to each other between spacing pin (411) and circular dish (45) up end.

3. The adjustable patient infusion support stand of claim 1, wherein: the transfusion heating unit (5) comprises a containing box (51), a ball hinge (52) and a supporting sleeve (53), wherein: the outer wall of flexible hollow rod (3) is equipped with support sleeve (53) through adjustable mode slip cover, and the outer wall circumference of support sleeve (53) evenly is provided with ball hinge (52), installs on ball hinge (52) and holds case (51), holds case (51) and keeps away from one side of ball hinge (52) and has seted up the holding tank, holds case (51) inside and installs the infusion bag of heating through the detachable mode.

4. The adjustable patient infusion support stand of claim 1, wherein: movable chassis (11) are including chassis foot (111), universal wheel (112) and inflator receiver (113), the outer wall circumference of balancing weight (12) evenly is provided with four chassis feet (111), and universal wheel (112) are all installed to the one end that balancing weight (12) were kept away from in four chassis feet (111), are provided with inflator receiver (113) between two arbitrary adjacent chassis feet (111).

5. The adjustable carriage of claim 1 wherein: the upper side outer wall of the fixed rod (2) is provided with a tray (61) through a bearing sleeve, and any side of the bottom of the tray (61) is provided with a storage basket (63).

6. The adjustable patient infusion support stand of claim 5, wherein: an object placing table (64) is arranged on one side, away from the object storing basket (63), of the upper end of the tray (61), and a plurality of J-shaped hooks (62) are installed on the circumferential surface, away from the object storing basket (63), of the tray (61) at equal intervals.

7. The adjustable patient infusion support stand of claim 4, wherein: the inflator storage box (113) is internally provided with a pedal inflator, and the air outlet end of the pedal inflator is communicated with the inflatable air bag (13).

8. The adjustable patient infusion support stand of claim 1, wherein: the center department of sucking disc safety cover (44) bottom runs through screw-thread fit's mode and is provided with threaded rod (48), installs sucking disc (49) after sucking disc safety cover (44) is passed to the upper end of threaded rod (48), and the lower extreme of threaded rod (48) is pegged graft in flexible hollow rod (3) after passing round plate (45) and cylinder sleeve (42) in proper order through threaded connection's mode.