阅读说明：本技术 一种镍铬合金烤瓷冠及sd栓道式附件的义齿及加工工艺 (Artificial tooth of nickel-chromium alloy porcelain crown and SD (secure digital) key way type accessory and processing technology ) 是由 雷梓豪 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种镍铬合金烤瓷冠及SD栓道式附件的义齿及加工工艺,包括SD栓道式附件义齿套、SD栓道式金属夹板、义齿本体、固定板、滑杆、滑轨、活动板、缓冲垫、海绵垫、乳胶垫、金属挡片、拉杆、滑动孔、挡板、第一弹簧套、压缩弹簧、第二弹簧套、第一伸缩管、滑道和滑块,所述SD栓道式附件义齿套顶部粘接有义齿本体,所述SD栓道式附件义齿套两端均设置有活动板,所述SD栓道式附件义齿套两端位于中心处两侧均焊接有第二伸缩管,所述第二伸缩管内部套接有第一伸缩管,该一种镍铬合金烤瓷冠及SD栓道式附件的义齿及加工工艺操作方便,树脂有效的避免出现连接缝隙,同时上色更加均匀,镍铬合金避免色彩脱落,有利于用户使用。(The invention discloses a denture of a nickel-chromium alloy porcelain crown and an SD (secure digital) key way type accessory and a processing technology thereof, comprising an SD key way type accessory denture sleeve, an SD key way type metal splint, a denture body, a fixed plate, a slide bar, a slide rail, a movable plate, a buffer pad, a spongy cushion, a latex cushion, a metal baffle, a pull rod, a slide hole, a baffle plate, a first spring sleeve, a compression spring, a second spring sleeve, a first telescopic pipe, a slide way and a slide block, wherein the top of the SD key way type accessory denture sleeve is bonded with the denture body, the two ends of the SD key way type accessory denture sleeve are respectively provided with the movable plate, the two ends of the SD key way type accessory denture sleeve positioned at the center are respectively welded with the second telescopic pipe, the first telescopic pipe is sleeved in the second telescopic pipe, the denture of the nickel-chromium alloy porcelain crown and the SD key way type accessory and the processing technology are convenient to operate, and the resin effectively avoids connecting gaps, meanwhile, the coloring is more uniform, and the color of the nickel-chromium alloy is prevented from falling off, so that the use by a user is facilitated.)

1. The utility model provides a nickel-chromium alloy porcelain crown and artificial tooth of SD bolt way formula annex, including SD bolt way formula annex sense tooth cover (1), SD bolt way formula metal splint (2), artificial tooth body (3), fixed plate (4), slide bar (5), slide rail (6), fly leaf (7), blotter (8), foam-rubber cushion (9), latex pad (10), metal separation blade (11), pull rod (12), slide opening (13), baffle (14), first spring housing (15), compression spring (16), second spring housing (17), first flexible pipe (18), reinforcing plate (19), baffle (20), reset spring (21), stripper plate (22), limit hole (23), kicking block (24), the flexible pipe of second (25), calorie hole (26), mounting groove (27), slide (28) and slider (29), its characterized in that: the top of the SD bolt way type accessory denture sleeve (1) is bonded with a denture body (3), both ends of the SD bolt way type accessory denture sleeve (1) are provided with movable plates (7), both ends of the SD bolt way type accessory denture sleeve (1) are positioned at both sides of the center and are provided with mounting grooves (27), a second telescopic pipe (25) is welded in the mounting grooves (27), a first telescopic pipe (18) is sleeved in the second telescopic pipe (25), the inner wall of the second telescopic pipe (25) is provided with a plurality of clamping holes (26), the inner wall of the first telescopic pipe (18) is welded with a reinforcing plate (19), a partition plate (20) is welded at the center of the bottom of the reinforcing plate (19), both sides of the bottom of the first telescopic pipe (18) are provided with edge holes (23), an ejector block (24) is sleeved in the edge holes (23), and one end of the ejector block (24) is sleeved in the clamping holes (26), the device is characterized in that an extrusion plate (22) is welded at one end of the ejector block (24), a plurality of reset springs (21) are arranged on one side of the extrusion plate (22), one ends of the reset springs (21) are connected with the partition plate (20), a movable plate (7) is welded at the top of the first telescopic pipe (18), a sliding rail (6) is welded at the top of the movable plate (7), a sliding rail (28) is arranged at the center of the sliding rail (6), a sliding block (29) is sleeved inside the sliding rail (28), a sliding rod (5) is welded at the top of the sliding block (29), a fixed plate (4) is welded at the top of the sliding rod (5), an SD (SD) bolt way type metal clamping plate (2) is welded at the top of the fixed plate (4), baffles (14) are welded at two sides of the top of the movable plate (7), the baffles (14, and pull rod (12) are connected with fixed plate (4) both ends, the welding of pull rod (12) one end has metal separation blade (11), and metal separation blade (11) are located baffle (14) both sides, baffle (14) one end is located center department both sides and all welds first spring housing (15), compression spring (16) have been cup jointed to first spring housing (15) one end, second spring housing (17) have been cup jointed to compression spring (16) one end, and second spring housing (17) one end is connected with fixed plate (4) both ends.

2. A process for processing a nickel-chromium alloy porcelain crown and a false tooth with an SD (secure digital) key way type accessory comprises the following steps of I, selecting materials; step two, processing parts; step three, false tooth processing; step four, packaging and storing; the method is characterized in that:

in the first step, gypsum, porcelain and resin required by the required artificial denture are manually selected, the required gypsum and porcelain are cleaned, the gypsum, the porcelain and the resin are mutually mixed and stirred, and the mixture is placed in a shade for storage after stirring;

in the second step, manually placing the mixture in the first step into a model trimming machine, processing the mixture into a denture model by using the model trimming machine, adding gypsum for compacting, scraping out the abutment by using an operating knife, removing gypsum nodules, simultaneously placing the processed denture into a calcining furnace for calcining until the denture model is formed, and then introducing inert gas for cooling;

manually coating a layer of hard mold water on the neck edge of the formed false tooth, uniformly coating a layer of nickel-chromium alloy gap coating from the neck edge to the outer side after the formed false tooth is slightly dried until the surface of the false tooth is colored, connecting the false tooth with the SD bolt way type accessory by using gypsum, and finally spraying porcelain on the false tooth to finish the processing of the false tooth;

and in the fourth step, the false tooth processed in the third step is manually checked whether the false tooth is worn or not, the abutment is checked whether the abutment has a fracture mark or not, and the false tooth is wrapped with a protective film after the false tooth is checked and placed in a box to be stored in a shade.

3. The denture of a nichrome porcelain crown and SD-bolted attachment as claimed in claim 1, characterized in that: the SD bolt way type metal clamping plate is characterized in that a buffer pad (8) is bonded on the inner wall of the SD bolt way type metal clamping plate (2), a spongy cushion (9) is bonded on the inner wall of the buffer pad (8), and a latex cushion (10) is bonded on the inner wall of the spongy cushion (9).

4. The denture of a nichrome porcelain crown and SD-bolted attachment as claimed in claim 1, characterized in that: spring grooves are formed in the centers of the first spring sleeve (15) and the second spring sleeve (17), and the spring grooves are sleeved on the outer side of the compression spring (16).

5. The denture of a nichrome porcelain crown and SD-bolted attachment as claimed in claim 1, characterized in that: the SD bolt way type accessory denture sleeve (1) is provided with porcelain powder on the outer side, and casting wax is arranged on the outer side of the porcelain powder.

6. The denture of a nichrome porcelain crown and SD-bolted attachment as claimed in claim 1, characterized in that: the SD bolt channel type accessory denture sleeve (1) and the outer side of the denture body (3) are sleeved with protective sleeves, and the SD bolt channel type accessory denture sleeve (1) and the outer side of the denture body (3) are sleeved with protective sleeves.

7. The denture of a nichrome porcelain crown and SD-bolted attachment as claimed in claim 1, characterized in that: the center of the baffle (14) is provided with a sliding hole (13), and the sliding hole (13) is sleeved outside the pull rod (12).

8. The process for machining a denture with a nichrome porcelain crown and an SD (secure digital) key way type accessory according to claim 2, which is characterized in that: and the false teeth in the fourth step are fixed by using the false tooth base and then are placed in a box for storage.

Technical Field

The invention relates to the technical field of false teeth, in particular to a nickel-chromium alloy porcelain crown and a false tooth with SD (secure digital) key way type accessories and a processing technology.

Background

The denture is a general term of a prosthesis manufactured after partial or all teeth of the upper and lower jaws are lost in medicine, and is generally a fixed denture which cannot be taken by a patient; the traditional false tooth is fixed by threads, and is fixed by a doctor by using a special instrument in a hospital and cannot be taken, if the traditional false tooth is damaged in daily life, a user cannot dismount the traditional false tooth in time, so that the traditional false tooth is not beneficial to use of the user, meanwhile, the traditional false tooth is of an integrated structure, the fixed distance of the key way type accessory of the false tooth cannot be adjusted during fixing, if the fixed distance of the key way type accessory set by the false tooth is larger than or smaller than the distance of a patient's teethridge, the traditional false tooth cannot be used, the processing process of the traditional false tooth is complex, the single processing; aiming at the defects, the design of the artificial tooth of the nickel-chromium alloy porcelain crown and the SD key way type accessory and the processing technology are necessary.

Disclosure of Invention

The invention aims to provide a nickel-chromium alloy porcelain crown and a false tooth with SD (secure digital) key way type accessories and a processing technology, which aim to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the denture comprises an SD (secure digital) key way type accessory denture sleeve, an SD key way type metal clamping plate, a denture body, a fixing plate, a sliding rod, a sliding rail, a movable plate, a buffer cushion, a spongy cushion, an emulsion cushion, a metal baffle, a pull rod, a sliding hole, a baffle, a first spring sleeve, a compression spring, a second spring sleeve, a first telescopic pipe, a reinforcing plate, a partition plate, a reset spring, an extrusion plate, an edge hole, a top block, a second telescopic pipe, a clamping hole, a mounting groove, a slideway and a sliding block, wherein the top of the SD key way type accessory denture sleeve is bonded with the denture body, the movable plate is arranged at two ends of the SD key way type accessory denture sleeve, the mounting grooves are formed in two sides of the center of the SD key way type accessory denture sleeve, the second telescopic pipe is welded in the mounting groove, the first telescopic pipe is sleeved in a telescopic way, and a plurality of clamping holes are formed in the inner wall of the second telescopic pipe, the first telescopic pipe is welded with a reinforcing plate on the inner wall, a baffle plate is welded at the center of the bottom of the reinforcing plate, side holes are formed in both sides of the bottom of the first telescopic pipe, a top block is sleeved in each side hole, one end of each top block is sleeved in each clamping hole, an extrusion plate is welded at one end of each top block, a plurality of reset springs are arranged on one side of each extrusion plate, one ends of the reset springs are connected with the baffle plate, a movable plate is welded at the top of the first telescopic pipe, a sliding rail is welded at the top of the movable plate, a sliding rail is arranged at the center of the sliding rail, a sliding block is sleeved in each sliding rail, a sliding rod is welded at the top of each sliding rod, a fixed plate is welded at the top of each fixed plate, SD (secure digital) bolt way type metal clamping plates are welded at both sides of the top, the welding of pull rod one end has the metal separation blade, and the metal separation blade is located the baffle both sides, baffle one end is located center department both sides and all welds first spring housing, compression spring has been cup jointed to first spring housing one end, compression spring one end has cup jointed the second spring housing, and second spring housing one end is connected with the fixed plate both ends.

A process for processing a nickel-chromium alloy porcelain crown and a false tooth with an SD (secure digital) key way type accessory comprises the following steps of I, selecting materials; step two, processing parts; step three, false tooth processing; step four, packaging and storing;

in the first step, gypsum, porcelain and resin required by the required artificial denture are manually selected, the required gypsum and porcelain are cleaned, the gypsum, the porcelain and the resin are mutually mixed and stirred, and the mixture is placed in a shade for storage after stirring;

in the second step, manually placing the mixture in the first step into a model trimming machine, processing the mixture into a denture model by using the model trimming machine, adding gypsum for compacting, scraping out the abutment by using an operating knife, removing gypsum nodules, simultaneously placing the processed denture into a calcining furnace for calcining until the denture model is formed, and then introducing inert gas for cooling;

manually coating a layer of hard mold water on the neck edge of the formed false tooth, uniformly coating a layer of nickel-chromium alloy gap coating from the neck edge to the outer side after the formed false tooth is slightly dried until the surface of the false tooth is colored, connecting the false tooth with the SD bolt way type accessory by using gypsum, and finally spraying porcelain on the false tooth to finish the processing of the false tooth;

and in the fourth step, the false tooth processed in the third step is manually checked whether the false tooth is worn or not, the abutment is checked whether the abutment has a fracture mark or not, and the false tooth is wrapped with a protective film after the false tooth is checked and placed in a box to be stored in a shade.

According to the technical scheme, the SD bolt way type metal clamping plate is bonded with the buffer pad on the inner wall, the spongy cushion is bonded on the inner wall, and the latex cushion is bonded on the inner wall of the spongy cushion.

According to the technical scheme, the spring groove is formed in the center of the first spring sleeve and the center of the second spring sleeve, and the spring groove is sleeved on the outer side of the compression spring.

According to the technical scheme, the external side of the SD bolt channel type accessory false tooth sleeve is provided with porcelain powder, and the external side of the porcelain powder is provided with casting wax.

According to the technical scheme, the SD bolt channel type accessory denture sleeve and the outer side of the denture body are sleeved with the protective sleeves, and the SD bolt channel type accessory denture sleeve and the outer side of the denture body are sleeved with the protective sleeves.

According to the technical scheme, the center of the baffle is provided with the sliding hole, and the sliding hole is sleeved on the outer side of the pull rod.

According to the technical scheme, the false teeth in the fourth step are fixed by using the false tooth base and then are placed in the box for storage.

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

1. the artificial tooth of the nickel-chromium alloy porcelain crown and the SD key way type accessory is simple in structure and convenient to operate, the jacking block is pressed to be retracted into the second telescopic pipe through the extrusion reset spring, the movable plate can be pulled freely, the distance between the SD key way type metal clamping plate and the SD key way type accessory denture sleeve is adjusted, the traditional integrated structure is abandoned, the distance between the SD key way type metal clamping plate and the SD key way type accessory denture sleeve can be adjusted freely, the situation that the SD key way type metal clamping plate cannot be fixed with a dental bed due to the fact that the installation distance is too large when a user uses the artificial tooth, and the use of the artificial tooth is facilitated for the user;

2. the artificial tooth of the nickel-chromium alloy porcelain crown and the SD key way type accessory is convenient to operate, the SD key way type metal clamping plate is extruded by the compression spring, so that the SD key way type metal clamping plate is clamped on two sides of the tooth root which is not fallen off on two sides of the patient's teethridge and can be fixedly used, the traditional thread clamping and fixing mode is abandoned, the clamping mode is adopted for fixing, the installation and the disassembly are more convenient and rapid, the artificial tooth is prevented from being damaged and cannot be taken by a user, the user can conveniently take and clean the artificial tooth, and the use of the user is greatly facilitated;

3. this artificial tooth and processing technology convenient operation of nickel-chromium alloy porcelain crown and SD key way formula annex, utilize model trimming machine with gypsum, porcelain matter and resin directly suppress into the artificial tooth, convenient and fast, the effectual connecting gap that avoids appearing of resin, the artificial tooth surface scribbles a layer of hard mould water earlier simultaneously, treat after slightly drying evenly coat one deck nickel-chromium alloy clearance coating to the outside by the neck reason, it accomplishes to coloring on the artificial tooth surface, then be connected artificial tooth and SD key way formula annex with gypsum, porcelain on the spraying at last, it is more even to color, nickel-chromium alloy avoids the color to drop, be favorable to the user to use.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a top view of the overall structure of the present invention;

FIG. 3 is a top view of the SD bolt-channel metal cleat of the present invention;

FIG. 4 is an enlarged view of the SD keyway type metal cleat of the present invention;

FIG. 5 is an enlarged detail view of the baffle of the present invention;

FIG. 6 is an enlarged detail view of the first telescoping tube of the present invention;

FIG. 7 is an enlarged detail view of the slide rail of the present invention;

FIG. 8 is a system flow diagram of the present invention;

in the figure: 1. an SD bolt way type accessory denture sleeve; 2. SD bolt way type metal splint; 3. a denture body; 4. a fixing plate; 5. a slide bar; 6. a slide rail; 7. a movable plate; 8. a cushion pad; 9. a sponge cushion; 10. a latex pad; 11. a metal baffle plate; 12. a pull rod; 13. a slide hole; 14. a baffle plate; 15. a first spring housing; 16. a compression spring; 17. a second spring housing; 18. a first telescopic tube; 19. a reinforcing plate; 20. a partition plate; 21. a return spring; 22. a pressing plate; 23. a side hole; 24. a top block; 25. a second telescopic tube; 26. a clamping hole; 27. mounting grooves; 28. a slideway; 29. a slide block.

Detailed Description

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

Referring to fig. 1-7, the present invention provides a technical solution: a nickel-chromium alloy porcelain crown and a false tooth of an SD key way type accessory comprise an SD key way type accessory false tooth sleeve 1, an SD key way type metal clamping plate 2, a false tooth body 3, a fixed plate 4, a sliding rod 5, a sliding rail 6, a movable plate 7, a buffer cushion 8, a spongy cushion 9, a latex cushion 10, a metal baffle 11, a pull rod 12, a sliding hole 13, a baffle 14, a first spring sleeve 15, a compression spring 16, a second spring sleeve 17, a first telescopic pipe 18, a reinforcing plate 19, a partition plate 20, a reset spring 21, a squeezing plate 22, an edge hole 23, a top block 24, a second telescopic pipe 25, a clamping hole 26, a mounting groove 27, a slideway 28 and a sliding block 29, wherein the outer side of the SD key way type accessory false tooth sleeve 1 is provided with baked porcelain, the outer side of the baked porcelain is provided with casting wax, the SD key way type accessory false tooth sleeve 1 is favorably used, the top of the SD key way type accessory false tooth sleeve 1 is provided with the false tooth sleeve 3, the SD key way type accessory false tooth sleeve 1 and the false, and the SD bolt way type accessory denture sleeve 1 and the outer side of the denture body 3 are sleeved with a protective sleeve, which is favorable for protecting the SD bolt way type accessory denture sleeve 1 and the denture body 3, both ends of the SD bolt way type accessory denture sleeve 1 are provided with movable plates 7, both ends of the SD bolt way type accessory denture sleeve 1, which are positioned at the two sides of the center, are provided with mounting grooves 27, the mounting grooves 27 are internally welded with second telescopic pipes 25, the second telescopic pipes 25 are internally sleeved with first telescopic pipes 18, the inner walls of the second telescopic pipes 25 are provided with a plurality of clamping holes 26, the inner walls of the first telescopic pipes 18 are welded with reinforcing plates 19, the centers of the bottoms of the reinforcing plates 19 are welded with partition plates 20, both sides of the bottoms of the first telescopic pipes 18 are provided with edge holes 23, the inside of the edge holes 23 is sleeved with jacking blocks 24, one ends of the jacking blocks 24 are sleeved inside the clamping holes 26, one ends of the jacking blocks, one end of a return spring 21 is connected with a partition plate 20, a movable plate 7 is welded at the top of a first telescopic pipe 18, a slide rail 6 is welded at the top of the movable plate 7, a slide rail 28 is arranged at the center of the slide rail 6, a slide block 29 is sleeved inside the slide rail 28, a slide rod 5 is welded at the top of the slide block 29, a fixed plate 4 is welded at the top of the slide rod 5, an SD (secure digital) bolt way type metal clamping plate 2 is welded at the top of the fixed plate 4, a cushion 8 is bonded on the inner wall of the SD bolt way type metal clamping plate 2, a sponge cushion 9 is bonded on the inner wall of the cushion 8, a latex cushion 10 is bonded on the inner wall of the sponge cushion 9, so that the SD bolt way type metal clamping plate 2 is favorably fixed, baffles 14 are welded at both sides of the top of the movable plate 7, the baffles 14 are positioned at both sides, be favorable to pull rod 12 to slide, the welding of pull rod 12 one end has metal separation blade 11, and metal separation blade 11 is located baffle 14 both sides, first spring housing 15 has all been welded to baffle 14 one end is located center department both sides, compression spring 16 has been cup jointed to first spring housing 15 one end, compression spring 16 one end has been cup jointed second spring housing 17, and second spring housing 17 one end is connected with fixed plate 4 both ends, first spring housing 15 has seted up the spring groove with second spring housing 17 center department, and the spring groove cup joints in the compression spring 16 outside, be favorable to compression spring 16 fixed.

Referring to fig. 8, the present invention provides a technical solution: a process for processing a nickel-chromium alloy porcelain crown and a false tooth with an SD (secure digital) key way type accessory comprises the following steps of I, selecting materials; step two, processing parts; step three, false tooth processing; step four, packaging and storing;

in the first step, gypsum, porcelain and resin required by the required artificial denture are manually selected, the required gypsum and porcelain are cleaned, the gypsum, the porcelain and the resin are mutually mixed and stirred, and the mixture is placed in a shade for storage after stirring;

in the second step, manually placing the mixture in the first step into a model trimming machine, processing the mixture into a denture model by using the model trimming machine, adding gypsum for compacting, scraping out the abutment by using an operating knife, removing gypsum nodules, simultaneously placing the processed denture into a calcining furnace for calcining until the denture model is formed, and then introducing inert gas for cooling;

manually coating a layer of hard mold water on the neck edge of the formed false tooth, uniformly coating a layer of nickel-chromium alloy gap coating from the neck edge to the outer side after the formed false tooth is slightly dried until the surface of the false tooth is colored, connecting the false tooth with the SD bolt way type accessory by using gypsum, and finally spraying porcelain on the false tooth to finish the processing of the false tooth;

and in the fourth step, the false tooth processed in the third step is manually checked to see whether the false tooth is worn or not, meanwhile, the abutment is checked to see whether the tooth has a fracture mark or not, after the detection is finished, the false tooth is wrapped with a protective film and placed in a box to be stored in a shade, and the false tooth is fixed by using a false tooth base.

Based on the above, the invention has the advantages that when the invention is used, a doctor presses the top block 24 inwards, the top block 24 extrudes the return spring 21 to retract into the second extension tube 25, the movable plate 7 is pulled, the movable plate 7 drives the first extension tube 18 to move until the distance between the movable plate 7 and the SD-bolt-channel type accessory denture sleeve 1 is adjusted to a proper distance, at the moment, the return spring 21 stretches back to extrude the top block 24, the top block 24 is clamped into the clamping hole 26 again to complete fixation, the doctor sleeves the SD-bolt-channel type accessory denture sleeve 1 on the outer side of the gum of a patient, the SD-bolt-channel type metal splint 2 is spread towards two sides by using a tool clamp, the SD-bolt-channel type metal splint 2 can slide in the slide rail 6 through the slide block 29, at the moment, the SD-bolt-channel type metal splint 2 moves outwards to extrude the compression spring 16, the compression spring 16 contracts to have elasticity, and then clamps the SD-channel type metal, the SD bolt way type metal clamping plate 2 is loosened, and the compression spring 16 stretches back to extrude the SD bolt way type metal clamping plate 2, so that the SD bolt way type metal clamping plate 2 can be fixed for use.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.