But animal medical science of filtering waste liquid is dissection operation panel for experiments
Technical Field
The invention belongs to the technical field of medical equipment, and particularly relates to an anatomical operation table capable of filtering waste liquid for animal medical experiments.
Background
Dissection is a medical and biological term, which means to dissect the human body or animal and plant bodies with a special knife or scissors. Anatomy (Human anatomi) is the science of studying normal morphological structures in humans. Belongs to the field of morphology of biological science and is an important basic course in medical science. The dissecting table is the most common laboratory or medical equipment in laboratories and operating rooms, and the dissecting table is used for carrying out human anatomy and animal anatomy generally. Conventional dissecting tables typically include a bed plate supported by legs and are very simple in construction. When the remains or the animal bodies are dissected, the remains or the animal bodies are placed on the bed board and then are dissected, and a carrier is provided for people to cut the remains or the animal bodies, so that convenience is brought.
Animal experiments are almost important components of each medical laboratory, corresponding disease models are often required to be established, circulatory system perfusion is carried out, or direct anesthesia is carried out for material taking, local material taking is often carried out in the operation process, foam plates or metal plates are selected as operation tables, animal limbs are fixed by adhesive tapes, and corresponding operations are carried out, however, the operation method has many defects
In addition, the invention is named as an animal experiment operating table under the Chinese patent publication No. CN205548753U, and the invention comprises a supporting platform, pulleys are arranged at four corners of the bottom end of the supporting platform, a lifting table is arranged at the top end of the supporting platform, an experiment table is arranged at the top end of the lifting table, a supporting box body is arranged at the left side of the lifting table, a waste liquid storage drawer is arranged in an inner cavity of the supporting box body, a connecting box body is arranged at the top end of the supporting box body and movably connected with the connecting box body, the top end of the connecting box body is connected with the experiment table, sliding grooves are arranged at the front side and the rear side of the experiment table, fixing devices are arranged at the inner sides of the sliding grooves and are in sliding connection with the fixing devices, each fixing device comprises a connecting plate, a fixing plate is arranged at the inner side of the connecting plate, a controller is arranged at the right side of the experiment table and is electrically connected with the lifting table, the test bench is equipped with the recess on the surface, the upper surface of recess is equipped with the through-hole, the inner chamber of test bench is equipped with the swash plate, the left side of swash plate is equipped with the second through-hole.
However, the existing dissecting operation table for animal medical experiments also has the problems that solid-liquid filtration and separation of wastes generated in the experiment process are inconvenient, and the problems of inconvenience in adjustment, fixation, taking of instruments and tools for experiments and disinfection cannot be realized according to different animal types.
Therefore, the invention provides an animal medical experiment dissection operation table capable of filtering waste liquid, which is very necessary.
Disclosure of Invention
In order to solve the technical problems, the invention provides an anatomical operating table for animal medicine experiments, which can filter waste liquid, and aims to solve the problems that the conventional anatomical operating table for animal medicine experiments is inconvenient to carry out solid-liquid filtration and separation on waste generated in the experiment process, cannot be adjusted and fixed according to different animal types, and is inconvenient to take and disinfect experimental instruments and tools. An anatomical operation table for animal medicine experiments capable of filtering waste liquid comprises a supporting base plate, moving wheels, supporting columns, a waste liquid buffer box, a solid-liquid classification buffer box structure, an anatomical experiment operation table plate structure, an adjustable restraint belt structure, a detachable anatomical table structure, a moving tool supporting box structure, a sterilizable experimental appliance push plate structure, a flow guide pipe, a manual control valve, a liquid level observation strip, a liquid drainage faucet and a fixed socket, wherein the moving wheels are respectively bolted at four corners of the lower surface of the supporting base plate; one end of the supporting column is bolted at the four-angle position of the upper surface of the supporting base plate, and the other end of the supporting column is bolted at the lower part of the anatomy experiment operation table plate structure; the waste liquid buffer box is connected to the middle position of the upper surface of the supporting base plate through a screw; the solid-liquid classification buffer box structure is arranged in the middle position of the lower side in the dissection experiment operation bedplate structure; the adjustable constraint belt structure is connected with the dissection experiment operation table plate structure; the detachable dissecting table structure is arranged in the middle of the upper surface of the dissecting experiment operation table plate structure; the movable tool supporting box structure is arranged at the right side position of the front surface of the dissection experiment operation table plate structure; the experimental tool push plate structure capable of being disinfected is arranged at the left side position of the upper surface of the dissection experiment operation table plate structure; the flow guide pipe is arranged between the waste liquid buffer box and the solid-liquid classification buffer box structure; the manual control valve is in threaded connection with the middle position of the left side of the flow guide pipe; the liquid level observation strip is embedded at the left side of the front surface of the waste liquid buffer tank; the liquid drainage water tap is in threaded connection with the lower part of the right side of the waste liquid buffer tank; the solid-liquid classification buffer box structure comprises a waste liquid collecting box, supporting blocks, a solid collecting hopper, a lifting ring and filter meshes, wherein the supporting blocks are respectively bolted at the upper positions of the left side and the right side inside the waste liquid collecting box; the solid collecting hopper is arranged at the upper part of the supporting block; the lifting rings are respectively connected to the left side and the right side of the upper surface of the solid collecting hopper through screws; the filter mesh is arranged at the lower surface of the inside of the solid collecting hopper.
Preferably, the dissection experiment operation table plate structure comprises a dissection support operation table plate, a middle leakage hole, a waste liquid tank clamping groove, a movable sliding hole and a shielding plate slot, wherein the middle leakage hole is formed in the middle of the inside of the dissection support operation table plate; the waste liquid tank clamping groove is arranged in the middle liquid leakage hole and is formed in the inner side of the dissection support operation bedplate; the movable sliding holes are respectively and longitudinally arranged at the left side and the right side of the inside of the dissecting support operation bedplate; the shielding plate slot is arranged in the middle of the upper side inside the dissecting support operation table plate.
Preferably, the adjustable restraint strap structure comprises a movable sliding block, a restraint bandage, a rotary sliding shaft, a jacking nut, an adjusting buckle and a fixed inserting buckle, wherein the restraint bandage is glued in the middle of the upper surface of the movable sliding block; one end of the rotating sliding shaft is in threaded connection with the middle position of the lower surface of the movable sliding block, and the other end of the rotating sliding shaft is in threaded connection with the inside of the jacking nut; the adjusting buckle is sleeved on the outer surface of the restraint bandage; the fixed eye-splice is glued on the upper end of the restraint bandage.
Preferably, the detachable dissecting table structure comprises a dissecting plate, a hand-held groove, a fixed inserted link, a bottom support auxiliary mesh plate and a connecting link, wherein the hand-held groove is respectively arranged at the left side and the right side of the lower part of the dissecting plate; the fixed inserted rods are respectively embedded at the four corners of the lower surface of the dissecting plate and positioned at the inner side of the handheld groove; the upper end of the connecting rod is sleeved on the lower side of the outer part of the fixed inserting rod, and the other end of the connecting rod is in threaded connection with the inner part of the bottom support auxiliary screen plate.
Preferably, the movable tool support box structure comprises a fixed sliding rod, a sliding sleeve, a support rod and a storage support box, wherein the sliding sleeve is sleeved on the outer surface of the fixed sliding rod; one end of the supporting rod is connected with the middle position of the lower surface of the object holding box through a screw, and the other end of the supporting rod is connected with the middle position of the upper surface of the sliding sleeve through a screw.
Preferably, the experimental apparatus push plate structure capable of being sterilized comprises a protective push plate, a hand-push handle, an experimental apparatus hook, a fixing insert and a sterilizing box, wherein the hand-push handle is connected with the upper part of the left side of the protective push plate through a screw; the experimental apparatus hook is in threaded connection with the upper part of the right side of the protective push plate; the fixed inserting strip is integrally arranged in the middle of the lower surface of the protection push plate; the disinfection box is glued at the lower part of the right side of the protection push plate.
Preferably, the connecting rod comprises a connecting rod main body, an inserting groove and a connecting bump, wherein the inserting groove is formed in the middle of the upper part of the connecting rod main body; the connecting lug is integrally arranged in the middle of the lower part of the connecting rod main body.
Preferably, the connecting rod body specifically adopts a cylindrical rubber rod; the outer surface of the connecting lug is provided with threads.
Preferably, a diversion elbow is embedded in the right side of the lower surface of the disinfection box; and a sealing plug is arranged at the intersection of the diversion elbow and the disinfection box.
Preferably, the bottom support auxiliary screen plate is a stainless steel screen plate with circular through holes; the bottom support auxiliary screen plate is clamped at the upper part of the middle liquid leakage hole.
Preferably, the rotating slide shaft is slidably arranged in the moving slide hole; the movable sliding block is arranged at the upper part of the dissecting support operation table plate; the jacking nut is arranged at the lower part of the dissection support operation bedplate.
Preferably, the waste liquid collecting box is a stainless steel box with an opening at the upper part; the waste liquid collecting box is connected in the waste liquid box clamping groove in a sliding and clamping mode.
Preferably, the moving wheel is a rubber universal wheel with a brake pad; the liquid level observation strip is a toughened glass strip with the thickness of three to five millimeters.
Preferably, one end of the flow guide pipe is embedded in the middle of the lower surface of the waste liquid collecting box, and the other end of the flow guide pipe is embedded in the middle of the upper surface of the waste liquid buffer box; the waste liquid collecting box is communicated with the inside of the waste liquid buffer box through the guide pipe.
Preferably, the fixed socket is glued to the top end of the restraint bandage arranged at the rear part; the fixed socket and the fixed inserting buckle are arranged in an inserting mode.
Preferably, the restraining bandage is a rectangular waterproof nylon bandage.
Preferably, the fixed sliding rod is a stainless steel plate with a shape like a Chinese character 'ji'; the object holding box is an aluminum box with an opening at the upper part.
Preferably, the fixed sliding rod is connected with the dissecting support operation table plate through screws.
Preferably, the fixed inserting strip is inserted into the shielding plate slot.
Preferably, the diversion elbow penetrates through the dissection support operation bedplate and is embedded at the upper position of the left side of the waste liquid collection box.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the waste liquid collecting box, the supporting block, the solid collecting hopper, the lifting ring and the filtering mesh are arranged, so that waste generated in the medical experiment process is favorably poured into the waste liquid collecting box and is filtered by the solid collecting hopper and the filtering mesh, the purpose of solid-liquid separation is achieved, and the lifting ring is held by a hand to conveniently lift and dump filtered solids.
2. According to the invention, the arrangement of the movable sliding hole, the movable sliding block, the rotary sliding shaft and the jacking nut is beneficial to the left-right adjustment and movement of the movable sliding block in the movable sliding hole, so that the position of the restraint bandage is adjusted, the restraint bandage is convenient to fix an anatomical or experimental tool, and the jacking nut is used for fixing, so that the limiting and shaping effects are achieved.
3. In the invention, the arrangement of the disinfection box, the sealing plug and the diversion elbow is beneficial to storing disinfectant in the disinfection box, so that instruments for experiments can be conveniently disinfected, and the disinfectant can be discharged and collected.
4. According to the invention, the arrangement of the fixed sliding rod, the sliding sleeve, the supporting rod and the object holding box is beneficial to placing an appliance in the process of an anatomical experiment, and can be used for sliding and adjusting left and right, so that the taking convenience is increased, and the experiment efficiency is improved.
5. According to the invention, the waste liquid buffer tank and the liquid discharge faucet are arranged, so that the generated waste liquid can be buffered, and an external pipeline can be conveniently connected to discharge the waste liquid.
6. In the invention, the dissecting plate is held by the hand with the groove, the inserting rod is fixed, and the bottom support auxiliary mesh plate is arranged, so that the dissecting plate can be detached and combined according to the experimental requirement, and the dissecting plate can be operated on the dissecting plate and the bottom support auxiliary mesh plate.
7. According to the invention, the arrangement of the connecting rod main body, the inserting groove and the connecting lug is beneficial to playing a role of connecting and supporting, the anatomical plate and the bottom support auxiliary screen plate are connected, and the experimental requirement is met.
8. According to the invention, the hook of the experimental instrument is arranged, so that the experimental instrument can be hung on the hook of the experimental instrument, the taking convenience is increased, and the operating space of the dissecting table is fully utilized.
9. In the invention, the moving wheels are rubber universal wheels with brake pads, which is beneficial to moving and fixing the experimental dissection platform and improves the convenience and safety of use.
10. According to the invention, the liquid level observation strip adopts a toughened glass strip with the thickness of three to five millimeters, so that the liquid level in the waste liquid buffer tank can be observed conveniently, and the liquid level observation strip can be conveniently connected with an external pipeline for discharging.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic top view of the present invention.
FIG. 3 is a schematic structural view of the solid-liquid classification buffer tank structure of the present invention.
Fig. 4 is a schematic structural view of the anatomical experiment operation table structure of the present invention.
FIG. 5 is a schematic structural view of an adjustable restraining strip of the present invention.
Fig. 6 is a schematic structural view of a detachable dissecting table structure of the present invention.
Fig. 7 is a schematic structural view of the connecting rod of the present invention.
Fig. 8 is a schematic structural view of the structure of the mobile tool tray of the present invention.
FIG. 9 is a schematic structural view showing the structure of a push plate of a sterilizable test device according to the present invention.
In the figure:
1. a support bed plate; 2. a moving wheel; 3. a support pillar; 4. a waste liquid buffer tank; 5. a solid-liquid classification buffer box structure; 51. a waste liquid collection box; 52. a support block; 53. a solid collecting hopper; 54. lifting the ring; 55. filtering meshes; 6. dissecting an experiment operation table plate structure; 61. an anatomical support operating deck; 62. a middle weep hole; 63. a waste liquid tank clamping groove; 64. moving the slide hole; 65. a shielding plate slot; 7. an adjustable restraint strap structure; 71. moving the slide block; 72. a restraining bandage; 73. rotating the sliding shaft; 74. tightly pushing the nut; 75. adjusting buckles; 76. fixing the eye-splice; 8. a detachable dissecting table structure; 81. a dissection plate; 82. holding the groove by hand; 83. fixing the inserted rod; 84. a bottom support auxiliary screen plate; 85. a connecting rod; 851. a connecting rod body; 852. inserting grooves; 853. a connection bump; 9. a mobile tool holder box structure; 91. fixing the sliding rod; 92. sliding the sleeve; 93. a strut; 94. a storage tray; 10. a sterile experimental appliance push plate structure; 101. a protective push plate; 102. a hand-push handle; 103. the experimental apparatus is hooked; 104. fixing the cutting; 105. a sterilizing box; 1051. a sealing plug; 1052. a diversion elbow; 11. a flow guide pipe; 12. a manual control valve; 13. a liquid level observation strip; 14. a drain tap; 15. and fixing the socket.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example (b):
as shown in fig. 1 to 3, the invention provides an anatomical operating table for animal medicine experiments, which can filter waste liquid, and comprises a supporting base plate 1, moving wheels 2, supporting columns 3, a waste liquid buffer tank 4, a solid-liquid classification buffer tank structure 5, an anatomical experiment operating table plate structure 6, an adjustable restraint belt structure 7, a detachable anatomical table structure 8, a moving tool supporting box structure 9, a sterilizable experimental tool push plate structure 10, a flow guide pipe 11, a manual control valve 12, a liquid level observation strip 13, a liquid discharge faucet 14 and a fixed socket 15, wherein the moving wheels 2 are respectively bolted at four corners of the lower surface of the supporting base plate 1; one end of the support column 3 is bolted at the four-angle position of the upper surface of the support base plate 1, and the other end of the support column is bolted at the lower part of the anatomy experiment operation table plate structure 6; the waste liquid buffer tank 4 is in screwed connection with the middle position of the upper surface of the supporting base plate 1; the solid-liquid classification buffer box structure 5 is arranged in the middle position of the lower side in the dissection experiment operation table plate structure 6; the adjustable restraint belt structure 7 is connected with the dissection experiment operation table plate structure 6; the detachable dissecting table structure 8 is arranged in the middle of the upper surface of the dissecting experiment operation table plate structure 6; the movable tool holder box structure 9 is arranged at the right side position of the front surface of the dissection experiment operation table plate structure 6; the experimental tool push plate structure 10 capable of being disinfected is arranged at the left side position of the upper surface of the dissection experiment operation table plate structure 6; the flow guide pipe 11 is arranged between the waste liquid buffer box 4 and the solid-liquid classification buffer box structure 5; the manual control valve 12 is in threaded connection with the middle position of the left side of the draft tube 11; the liquid level observation strip 13 is embedded at the left position of the front surface of the waste liquid buffer tank 4; the liquid discharge faucet 14 is in threaded connection with the lower part of the right side of the waste liquid buffer tank 4; the solid-liquid classification buffer box structure 5 comprises a waste liquid collection box 51, supporting blocks 52, a solid collection hopper 53, a lifting ring 54 and filter meshes 55, wherein the supporting blocks 52 are respectively bolted at the upper positions of the left side and the right side in the waste liquid collection box 51; the solid collecting hopper 53 is arranged at the upper part of the supporting block 52; the lifting rings 54 are respectively screwed at the left side and the right side of the upper surface of the solid collecting hopper 53; the filtering meshes 55 are arranged on the inner lower surface of the solid collecting hopper 53.
As shown in fig. 4, in this embodiment, specifically, the dissection experiment operation table structure 6 includes a dissection support operation table 61, a middle leakage hole 62, a waste liquid tank clamping groove 63, a moving slide hole 64 and a shutter slot 65, wherein the middle leakage hole 62 is opened in the middle position inside the dissection support operation table 61; the waste liquid tank clamping groove 63 is arranged inside the middle liquid leakage hole 62 and is formed in the inner side of the dissection support operation bedplate 61; the movable sliding holes 64 are respectively and longitudinally arranged at the left side and the right side inside the dissecting support operation table plate 61; the shutter slot 65 is opened at an upper middle position inside the dissecting support operation table 61.
As shown in fig. 5, in this embodiment, specifically, the adjustable restraining strip structure 7 includes a moving slider 71, a restraining bandage 72, a rotating sliding shaft 73, a tightening nut 74, an adjusting buckle 75 and a fixing buckle 76, wherein the restraining bandage 72 is glued to the middle position of the upper surface of the moving slider 71; one end of the rotating sliding shaft 73 is in threaded connection with the middle position of the lower surface of the movable sliding block 71, and the other end of the rotating sliding shaft is in threaded connection with the inside of the jacking nut 74; the adjusting buckle 75 is sleeved on the outer surface of the restriction bandage 72; the retaining clip 76 is adhesively attached to the upper end of the restraining bandage 72.
As shown in fig. 6, in this embodiment, specifically, the detachable dissecting table structure 8 includes a dissecting plate 81, a hand-held recess 82, a fixed inserting rod 83, a bottom-support auxiliary mesh plate 84 and a connecting rod 85, wherein the hand-held recess 82 is respectively formed at the left and right sides of the lower portion of the dissecting plate 81; the fixed insertion rods 83 are respectively embedded at four corners of the lower surface of the dissection plate 81 and positioned at the inner side of the hand holding groove 82; the upper end of the connecting rod 85 is sleeved at the lower side of the outside of the fixed inserted rod 83, and the other end of the connecting rod is in threaded connection with the inside of the bottom support auxiliary screen plate 84.
As shown in fig. 8, in this embodiment, specifically, the movable tool holder box structure 9 includes a fixed sliding rod 91, a sliding sleeve 92, a supporting rod 93 and a storage holder box 94, wherein the sliding sleeve 92 is sleeved on an outer surface of the fixed sliding rod 91; one end of the supporting rod 93 is screwed to the middle position of the lower surface of the object holding box 94, and the other end is screwed to the middle position of the upper surface of the sliding sleeve 92.
As shown in fig. 9, in this embodiment, specifically, the sterilizable laboratory appliance push plate structure 10 includes a protection push plate 101, a hand-push handle 102, a laboratory appliance hook 103, a fixing insert 104 and a sterilization box 105, wherein the hand-push handle 102 is screwed on the upper left side of the protection push plate 101; the experimental instrument hook 103 is in threaded connection with the upper position of the right side of the protective push plate 101; the fixed inserting strip 104 is integrally arranged in the middle of the lower surface of the protection push plate 101; the disinfection box 105 is glued at the lower position of the right side of the protection push plate 101.
As shown in fig. 7, in this embodiment, specifically, the connecting rod 85 includes a connecting rod main body 851, an insertion groove 852 and a connecting projection 853, wherein the insertion groove 852 is provided at an upper middle position of the connecting rod main body 851; the connecting convex block 853 is integrally arranged at the middle position of the lower part of the connecting rod main body 851.
In this embodiment, specifically, the connecting rod main body 851 specifically adopts a cylindrical rubber rod; the outer surface of the connecting lug 853 is provided with threads.
In this embodiment, specifically, a diversion bend 1052 is embedded in the right position of the lower surface of the sterilizing box 105; the intersection of the diversion bend 1052 and the disinfection box 105 is provided with a sealing plug 1051.
In this embodiment, specifically, the bottom-support auxiliary screen plate 84 is a stainless steel screen plate with circular through holes; the bottom support auxiliary screen plate 84 is clamped at the upper part of the middle weep hole 62.
In this embodiment, specifically, the rotating slide shaft 73 is slidably disposed in the moving slide hole 64; the moving slide block 71 is arranged at the upper part of the dissection support operation table plate 61; the jacking nut 74 is arranged at the lower part of the dissection support operation table plate 61.
In this embodiment, the waste liquid collecting box 51 is a stainless steel box with an opening at the upper part; the waste liquid collecting box 51 is slidably clamped in the waste liquid box clamping groove 63.
In this embodiment, specifically, the moving wheel 2 specifically adopts a rubber universal wheel with a brake pad; the liquid level observation strip 13 is a toughened glass strip with the thickness of three to five millimeters.
In this embodiment, specifically, one end of the flow guide tube 11 is embedded in the middle of the lower surface of the waste liquid collection box 51, and the other end is embedded in the middle of the upper surface of the waste liquid buffer box 4; the waste liquid collecting box 51 is communicated with the interior of the waste liquid buffer box 4 through the guide pipe 11.
In this embodiment, specifically, the fixed socket 15 is glued to the top end of the restriction bandage 72 arranged at the rear part; the fixed socket 15 and the fixed insert 76 are inserted into each other.
In this embodiment, the restraining bandage 72 is a rectangular waterproof nylon bandage.
In this embodiment, specifically, the fixed sliding rod 91 is a stainless steel plate with a shape like a Chinese character 'ji'; the object holding box 94 is an aluminum box with an opening at the upper part.
In this embodiment, specifically, the fixed sliding rod 91 is connected to the dissecting support operating table 61 by screws.
In this embodiment, specifically, the fixing strip 104 is inserted into the shutter slot 65.
In this embodiment, specifically, the diversion bend 1052 penetrates through the dissection support operation platen 61 and is embedded in the upper left position of the waste liquid collection box 51.
Principle of operation
When the device is used, an experimental device is hung on the hook 103 of the experimental device, disinfectant is poured into the disinfection box 105, the hand-push grab handle 102 is held by a hand to push the protective push plate 101, the dissecting operation table is moved to a position to be used under the action of the moving wheel 2, and the brake pad of the moving wheel 2 is fixed, so that the fixing effect is achieved; the movable sliding block 71 is adjusted to slide left and right in the movable sliding hole 64, so that the rotary sliding shaft 73 slides in the movable sliding hole 64 to adjust the position, the tightening nut 74 is screwed to achieve the fixing effect, the length of the restraint bandage 72 is adjusted through the adjusting buckle 75, the animal carcass for the experiment is placed on the dissecting plate 81 or the bottom support auxiliary mesh plate 84, the fixing buckle 76 and the fixing socket 15 are inserted together to achieve the effect of fixing the animal carcass; in the experiment process, the appliance is placed at the upper part of the object holding box 94, and the sliding sleeve 92 slides left and right on the fixed sliding rod 91, so that the convenience of taking the appliance is improved; in the process of carrying out the dissection experiment, the generated waste is collected to the upper part of a solid collecting hopper 53 in a waste liquid collecting box 51 through a waste liquid box clamping groove 63, the waste liquid falls into the lower part of the waste liquid collecting box 51 through a filter mesh 55, and a manual control valve 12 is opened to enable the liquid to flow into a waste liquid buffer box 4 through a guide pipe 11 for buffering; after use, the solid waste in the solid collecting hopper 53 is cleaned by lifting the pull ring 54 with hands, and the waste liquid in the waste liquid buffer tank 4 is discharged by connecting an external pipeline to the liquid discharge faucet 14.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention.