阅读说明：本技术 航空座椅垫泡沫组件加工用数控雕刻机及其数控雕刻方法 (Numerical control engraving machine for machining aviation seat cushion foam assembly and numerical control engraving method thereof ) 是由 郭祥峰 周晓栋 耿筱涵 王金雄 于 2021-08-23 设计创作，主要内容包括：本发明公开了航空座椅垫泡沫组件加工用数控雕刻机及其数控雕刻方法,具体涉及数控雕刻机技术领域,本发明通过输送带对产品输送,可以达到自动上料的目的,且可以在输送的过程中,完成自动夹持产品的目的,进而可以保持产品的稳定性,保障了产品的雕刻加工质量,并且可以在加工完成后,可翻转加工壳达到自动排料的目的,同时可以完成自动松脱产品固定的效果,使得整个上料、定位、排料和松脱可以实现自动化运行的目的,为产品的加工提供了便捷性,并且可以完成不同位置加工壳的循环切换使用,从而可以实现批量的连续化生产工作,且本装置结构简单,操作简易,从而具有良好的市场应用价值。(The invention discloses a numerical control engraving machine for processing a foam component of an aircraft seat cushion and a numerical control engraving method thereof, in particular to the technical field of the numerical control engraving machine, the invention can convey a product through a conveying belt, can achieve the purpose of automatic feeding, can achieve the purpose of automatically clamping the product in the conveying process, further can maintain the stability of the product, ensures the engraving processing quality of the product, can overturn a processing shell to achieve the purpose of automatic discharging after the processing is completed, can complete the effect of automatically loosening and fixing the product, can realize the purpose of automatic operation of the whole feeding, positioning, discharging and loosening, provides convenience for the processing of the product, can complete the circular switching use of processing shells at different positions, can realize the batch continuous production work, and has simple structure and easy operation, thereby having good market application value.)

1. The utility model provides an aviation seat pad foam subassembly processing is with numerical control engraver, includes base (1), its characterized in that: the upper surface of the base (1) is fixedly connected with the lower surface of a numerical control host (2), the numerical control host (2) is connected with a multi-shaft engraving machine (3), the lower surface of the multi-shaft engraving machine (3) is fixedly connected with the upper surfaces of two supporting plates (4), the front surfaces of the supporting plates (4) are fixedly connected with the back surfaces of connecting plates (5), and the back surfaces of the connecting plates (5) are fixedly connected with the front surfaces of fixing plates (6);

the front surface of the fixing plate (6) is fixedly connected with the back surface of the toothed plate (10), the back surface of the fixing plate (6) is fixedly connected with the front surface of the guide plate (7), the lower surfaces of the two fixing plates (6) are fixedly connected with the upper surface of the base (1), the upper surface of the base (1) is fixedly connected with the upper surfaces of the four supporting seats (14), the front surfaces of the four supporting seats (14) are respectively clamped with a second bearing (18), the inner surfaces of the two second bearings (18) are sleeved with the same transmission shaft (17), the front surface of the right transmission shaft (17) is fixedly connected with an output shaft of the motor (12), and the two transmission shafts (17) are in transmission connection through the conveying belt (15);

six rotating assembly (8) of surface fixed connection of conveyer belt (15), two the opposite face of rotating assembly (8) respectively with the front and the back fixed connection of processing shell (11), be provided with eight splint (19), four in processing shell (11) the joint has same movable rod (20) in splint (19), the front of movable rod (20) and the back fixed connection of ball (22), wherein two the back of the body face of ball (22) respectively with the opposite face overlap joint of two deflector (7), two uide bushing (13), one of them have been cup jointed to the surface of movable rod (20) the front of uide bushing (13) and the one end fixed connection of spring (9), the other end of spring (9) and the fixed surface connection of movable rod (20).

2. The numerical control engraving machine for processing the foam component of the aircraft seat cushion as claimed in claim 1, wherein: the lower surface of the motor (12) is fixedly connected with the upper surface of the fixed seat (16), and the back surface of the fixed seat (16) is fixedly connected with the front surface of the supporting seat (14).

3. The numerical control engraving machine for processing the foam component of the aircraft seat cushion as claimed in claim 1, wherein: three through holes (21) are formed in the processing shell (11), and the movable rod (20) is located in the three through holes (21).

4. The numerical control engraving machine for processing the foam component of the aircraft seat cushion as claimed in claim 1, wherein: the rotating assembly (8) comprises a connecting shaft (82), the back of the connecting shaft (82) is fixedly connected with the front of the machining shell (11), and the outer surface of the connecting shaft (82) is fixedly connected with the inner surface of the gear (81).

5. The numerical control engraving machine for processing the foam component of the aircraft seat cushion as claimed in claim 4, wherein: the outer surface of the connecting shaft (82) is sleeved with a first bearing (83), the lower surface of the first bearing (83) is fixedly connected with the top end of a telescopic rod (84), and the bottom end of the telescopic rod (84) is fixedly connected with the upper surface of the conveying belt (15).

6. The numerical control engraving machine for processing the foam component of the aircraft seat cushion as claimed in claim 1, wherein: the connecting plate (5) is arc-shaped.

7. The numerical control engraving machine for processing the foam component of the aircraft seat cushion as claimed in claim 1, wherein: one end of the guide plate (7) is arranged to be an inclined plane.

8. A numerical control engraving method of a numerical control engraving machine for machining an aviation seat cushion foam component, which is characterized by comprising the following operation steps of:

s1, turning on a power supply of the numerical control host (2) and the multi-axis engraving machine (3), formatting a program, completing mechanical reset of the multi-axis engraving machine (3), inputting information of a processed product through the numerical control host (2), then guiding into an engraving pattern library, storing, selecting an engraving pattern, fitting the engraving pattern with the product information, correcting a contour curve, and guiding the corrected contour curve into the multi-axis engraving machine (3);

s2, after the multi-axis numerical control engraving machine is adjusted, the product is placed in the processing shell (11) to enable the product to correspond to the two clamping plates (19), the motor (12) is controlled to operate, the motor (12) drives the transmission shaft (17) to rotate, the two transmission shafts (17) drive the conveying belt (15) to transmit, the conveying belt (15) drives the connecting shaft (82) to move through the telescopic rod (84), then the product in the processing shell (11) is conveyed, when the ball (22) contacts with the right inclined surface of the guide plate (7), the guide plate (7) extrudes the ball (22) to generate displacement, the ball (22) pushes the movable rod (20) to move, the movable rod (20) compresses the spring (9) and drives the clamping plates (19) to move, the two clamping plates (19) are close to each other to clamp and position the product, when the position of the product corresponds to the position of the multi-axis numerical control engraving machine (3), stopping the motor (12) from operating, and controlling the multi-axis engraving machine (3) to perform product engraving according to the program of the numerical control host (2);

s3, after the product is processed, the motor (12) continues to operate, the conveying belt (15) continues to control the product inside the processing shell (11) to convey, when the connecting shaft (82) moves to the inclined plane of the fixing plate (6), the connecting shaft (82) moves upwards along the inclined plane of the fixing plate (6), under the action of the telescopic rod (84), the processing shell (11) drives the product to move upwards, when the gear (81) is meshed with the toothed plate (10), the gear (81) rotates, the gear (81) drives the connecting shaft (82) to rotate, the connecting shaft (82) drives the processing shell (11) to rotate, waste materials inside the processing shell (11) can be poured and discharged, when the ball (22) is separated from the guide plate (7), the elastic force of the spring (9) can drive the movable rod (20) to move, and the movable rod (20) can drive the two clamping plates (19) to be far away from each other, the product can be automatically loosened and taken out, or the product enters the next procedure, and meanwhile, the processing shell (11) at the other processing position can correspond to the position of the multi-axis engraving machine (3) to perform the work to be processed.

Technical Field

The invention relates to the technical field of numerical control engraving machines, in particular to a numerical control engraving machine for machining a foam component of an aircraft seat cushion and a numerical control engraving method thereof.

Background

The numerical control engraving machine comprises a woodworking engraving machine, a stone engraving machine, an advertisement engraving machine, a glass engraving machine, a laser engraving machine, a plasma engraving machine and a laser cutting machine, and can perform engraving on wooden doors, furniture, metal, acrylic and the like at high speed and high precision.

Aviation seat pad foam is generally composed of polyethylene foam and soft bubble of polyurethane, when producing to aviation seat pad foam man-hour, can adopt accurate numerical control engraver to process production to it usually, but current numerical control engraver, before carving, often need place the below at the engraver with the glyptic article of needs earlier, then just can begin to process after using locating component to fix a position, and after processing is accomplished, need control numerical control engraver stop work earlier, remove the fixed to article again, then overturn so that pour the sweeps of carving the position to it, just can repeat above-mentioned step and carve next article, whole process is comparatively troublesome, can waste longer time, be difficult to realize batch serialization production.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a numerical control engraving machine for processing an aviation seat cushion foam component and a numerical control engraving method thereof, and the technical problems to be solved by the invention are as follows: the existing numerical control engraving machine is used for engraving, the required engraved article is often placed below the engraving machine firstly, then the positioning assembly is used for positioning, and then the processing can be started, after the processing is completed, the numerical control engraving machine is required to be controlled to stop working firstly, the fixing of the article is released, then the article is overturned so as to pour out the scraps at the engraving position, the steps can be repeated to engrave the next article, the whole process is troublesome, the longer time can be wasted, and the problem of batch continuous production is difficult to realize.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an aviation seat pad foam subassembly processing is with numerical control engraver, includes the base, the upper surface of base and the lower fixed surface of numerical control host computer are connected, the numerical control host computer is connected with the multiaxis engraver, the lower surface of multiaxis engraver and the upper fixed surface of two backup pads are connected, the front of backup pad and the back fixed connection of connecting plate, the back of connecting plate and the front fixed connection of fixed plate.

The front of fixed plate and the back fixed connection of pinion rack, the back of fixed plate and the front fixed connection of deflector, two the lower surface of fixed plate and the upper surface fixed connection of base, the upper surface of base and the upper surface fixed connection of four supporting seats, four the equal joint in front of supporting seat has the second bearing, two the internal surface of second bearing has cup jointed same transmission shaft, right side the front of transmission shaft and the output shaft fixed connection of motor, two the transmission shaft passes through the conveyer belt transmission and connects.

Six rotating assembly of surface fixed connection of conveyer belt, two rotating assembly's opposite face respectively with the front and the back fixed connection of processing shell, be provided with eight splint, four in the processing shell the joint has same movable rod in the splint, the front of movable rod and the back fixed connection of ball, wherein two the opposite face overlap joint with the opposite face of two deflectors respectively on the back of the body of ball, two uide bushings, one of them have been cup jointed to the surface of movable rod the front of uide bushing and the one end fixed connection of spring, the other end of spring and the fixed surface of movable rod are connected.

As a further scheme of the invention: the lower surface of the motor is fixedly connected with the upper surface of the fixing seat, and the back of the fixing seat is fixedly connected with the front of the supporting seat.

As a further scheme of the invention: three through holes are formed in the processing shell, and the movable rod is located in the three through holes.

As a further scheme of the invention: the rotating assembly comprises a connecting shaft, the back of the connecting shaft is fixedly connected with the front of the processing shell, and the outer surface of the connecting shaft is fixedly connected with the inner surface of the gear.

As a further scheme of the invention: the outer surface of the connecting shaft is sleeved with a first bearing, the lower surface of the first bearing is fixedly connected with the top end of the telescopic rod, and the bottom end of the telescopic rod is fixedly connected with the upper surface of the conveying belt.

As a further scheme of the invention: the shape of the connecting plate is arc-shaped.

As a further scheme of the invention: one end of the guide plate is arranged to be an inclined plane.

A numerical control engraving method of a numerical control engraving machine for machining an aviation seat cushion foam component comprises the following operation steps:

and S1, turning on the power supply of the numerical control host and the multi-axis engraving machine, formatting the program, simultaneously completing the mechanical reset of the multi-axis engraving machine, inputting the information of the processed product through the numerical control host, then guiding the information into an engraving pattern library, storing the engraving pattern library, selecting the engraving pattern, fitting the engraving pattern and the product information, correcting the profile curve, and then guiding the corrected profile curve into the multi-axis engraving machine.

S2, after the multiaxis numerical control engraver is adjusted, arrange the product in the processing shell, make the product correspond with two splint, the motor operation of controlling again, the motor drives the transmission shaft and rotates, make two transmission shafts drive the conveyer belt and transmit, make the conveyer belt drive the connecting axle through the telescopic link and remove, then carry the inside product of processing shell, when treating the ball and the right side inclined plane contact of deflector, make the deflector extrude the ball and produce the displacement, make the ball promote the movable rod and remove, make the movable rod compression spring, and drive the splint and remove, make two splint be close to each other and can carry out the work of centre gripping location to the product, treat that the product position corresponds with the position of multiaxis engraver, stop the motor operation, can carry out the work of product engraving according to the program control multiaxis engraver of numerical control host computer this moment.

S3, after the product is processed, the motor continues to run, the conveying belt continues to control the conveying of the product in the processing shell, when the connecting shaft moves to the inclined plane of the fixed plate, the connecting shaft moves upwards along the inclined plane of the fixed plate, under the action of the telescopic rod, the processing shell drives the product to move upwards, when the gear is meshed with the toothed plate, the gear rotates, so that the gear drives the connecting shaft to rotate, the connecting shaft drives the processing shell to rotate, waste materials in the processing shell can be dumped and discharged, when the ball is separated from the guide plate, the elastic force of the spring can drive the movable rod to move, so that the movable rod can drive the two clamping plates to be away from each other, the product can be automatically loosened and taken out, or the product enters the next procedure, and simultaneously, the processing shell at the other processing position can perform the work to be processed corresponding to the position of the multi-axis engraving machine.

The invention has the beneficial effects that:

1. according to the automatic material feeding device, a product is conveyed through the conveying belt, so that the purpose of automatic material feeding can be achieved, the purpose of automatically clamping the product can be achieved in the conveying process, the stability of the product can be further kept, the engraving quality of the product is guaranteed, the shell can be machined after the product is machined, so that the purpose of automatic material discharging can be achieved, meanwhile, the fixing effect of automatically loosening the product can be achieved, the automatic operation can be achieved by the whole material feeding, positioning, material discharging and loosening, convenience is provided for the machining of the product, the cyclic switching use of the machined shells at different positions can be achieved, and the batch continuous production work can be achieved;

2. according to the invention, the guide plate and the fixed plate are arranged, and the guide plate and the fixed plate are designed to be inclined surfaces, so that the connecting shaft can move upwards along the inclined surfaces, the work of processing the height of the shell can be smoothly promoted, a moving space can be further provided for the subsequent overturning of the processed shell, the normal rotation of the processed shell is ensured, and the discharging work of the device can be further smoothly realized.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic bottom perspective view of the conveyor belt of the present invention;

FIG. 3 is a schematic three-dimensional structure of a process shell according to the present invention;

FIG. 4 is an enlarged schematic view of FIG. 3 at A according to the present invention;

FIG. 5 is a perspective view of a fixing plate according to the present invention;

in the figure: the automatic carving machine comprises a base 1, a numerical control main machine 2, a multi-shaft carving machine 3, a supporting plate 4, a connecting plate 5, a fixing plate 6, a guide plate 7, a rotating assembly 8, a gear 81, a connecting shaft 82, a first bearing 83, an expansion rod 84, a spring 9, a toothed plate 10, a processing shell 11, a motor 12, a guide sleeve 13, a supporting seat 14, a conveying belt 15, a fixed seat 16, a transmission shaft 17, a second bearing 18, a clamping plate 19, a movable rod 20, a through hole 21 and a ball 22.

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.

As shown in fig. 1-5, the invention provides a numerical control engraving machine for processing a foam component of an aircraft seat cushion, which comprises a base 1, wherein the upper surface of the base 1 is fixedly connected with the lower surface of a numerical control host 2, the numerical control host 2 is connected with a multi-shaft engraving machine 3, the lower surface of the multi-shaft engraving machine 3 is fixedly connected with the upper surfaces of two support plates 4, the support plates 4 are arranged to support and fix the multi-shaft engraving machine 3, the front surfaces of the support plates 4 are fixedly connected with the back surfaces of connecting plates 5, and the back surfaces of the connecting plates 5 are fixedly connected with the front surfaces of fixing plates 6.

The front surface of the fixing plate 6 is fixedly connected with the back surface of the toothed plate 10, the toothed structure of the toothed plate 10 can provide a rotation condition for the gear 81 by arranging the toothed plate 10, the gear 81 can control the purpose of overturning the processing shell 11 through the connecting shaft 82, the back surface of the fixing plate 6 is fixedly connected with the front surface of the guide plate 7, the guide plate 7 and the fixing plate 6 are arranged, parts of the guide plate 7 and the fixing plate 6 are designed to be inclined surfaces, the connecting shaft 82 can move upwards along the inclined surfaces, the work of the height of the processing shell 11 can be smoothly promoted, a movable space can be further provided for the subsequent overturning of the processing shell 11, the normal rotation of the processing shell 11 is guaranteed, the discharging work of the device can be smoothly realized, the lower surfaces of the two fixing plates 6 are fixedly connected with the upper surface of the base 1, and the upper surface of the base 1 is fixedly connected with the upper surfaces of the four supporting seats 14, through setting up supporting seat 14, make supporting seat 14 can be fixed to second bearing 18, the equal joint in front of four supporting seats 14 has second bearing 18, through setting up second bearing 18, make second bearing 18 can play the effect of support to transmission shaft 17, second bearing 18 can ensure transmission shaft 17 to carry out normal rotatory work simultaneously, same transmission shaft 17 has been cup jointed to the internal surface of two second bearings 18, the front of right side transmission shaft 17 and the output shaft fixed connection of motor 12, two transmission shafts 17 pass through 15 transmission of conveyer belt and are connected, through setting up conveyer belt 15, make conveyer belt 15 can realize driven effect under the drive of motor 12, and then can realize that the product carries out the purpose of material loading, processing for the product provides convenience.

Six rotating assemblies 8 are fixedly connected to the outer surface of the conveying belt 15, the opposite faces of the two rotating assemblies 8 are fixedly connected with the front face and the back face of the processing shell 11 respectively, eight clamping plates 19 are arranged in the processing shell 11, the same movable rod 20 is clamped in the four clamping plates 19, the front face of the movable rod 20 is fixedly connected with the back face of the ball 22, the ball 22 is enabled to have rolling property by arranging the ball 22, the ball 22 can reduce the friction force between the ball 22 and the guide plates 7, the ball 22 can smoothly slide, the opposite faces of the two balls 22 are respectively overlapped with the opposite faces of the two guide plates 7, two guide sleeves 13 are sleeved on the outer surface of the movable rod 20, the guide sleeves 13 can ensure the smooth sliding work of the movable rod 20 by arranging the guide sleeves 13, the front face of one of the guide sleeves 13 is fixedly connected with one end of the spring 9, through setting up spring 9, and spring 9's elastic force can drive movable rod 20 and remove, and then can control splint 19 and reset, further can loosen the purpose of taking off the product to easily taking out of product, spring 9's the other end and movable rod 20's fixed surface are connected.

As shown in fig. 2, the lower surface of the motor 12 is fixedly connected with the upper surface of the fixing seat 16, and by arranging the fixing seat 16, the fixing seat 16 can fix the motor 12, so that the motor 12 can reach the placing stability, and the back surface of the fixing seat 16 is fixedly connected with the front surface of the supporting seat 14.

As shown in fig. 3, three through holes 21 are formed in the processing shell 11, and through the through holes 21, the through holes 21 can provide a moving space for the movable rod 20, so that the movable rod 20 can work normally, and the movable rod 20 is located in the three through holes 21.

As shown in fig. 4, the rotating assembly 8 includes a connecting shaft 82, the back of the connecting shaft 82 and the front fixed connection of the processing shell 11, the outer surface of the connecting shaft 82 and the inner fixed surface of the gear 81 are connected, a first bearing 83 is sleeved on the outer surface of the connecting shaft 82, through the arrangement of the first bearing 83, the first bearing 83 can ensure the normal rotation of the connecting shaft 82, the lower surface of the first bearing 83 and the top fixed connection of the telescopic rod 84, through the arrangement of the telescopic rod 84, the telescopic rod 84 has the flexibility, the up-and-down smooth movement of the processing shell 11 can be ensured, the bottom end of the telescopic rod 84 is fixedly connected with the upper surface of the conveying belt 15.

As shown in fig. 1 and 5, the shape of the connecting plate 5 is set to be arc-shaped, by setting the connecting plate 5, and the connecting plate 5 is set to be arc-shaped, so that the arc-shaped design can provide a moving space for the gear 81, and avoid the problem that the connecting plate 5 blocks the gear 81 and cannot move, one end of the guide plate 7 is set to be an inclined plane, by setting the guide plate 7, and one end of the guide plate 7 is set to be an inclined plane, so that the balls 22 can smoothly contact with the surface of the guide plate 7, and the work of the control clamping plate 19 on clamping the product can be achieved through the inclined plane of the guide plate 7.

A numerical control engraving method of a numerical control engraving machine for machining an aviation seat cushion foam component comprises the following operation steps:

and S1, turning on the power supplies of the numerical control host 2 and the multi-axis engraving machine 3, formatting the program, simultaneously completing the mechanical reset of the multi-axis engraving machine 3, inputting the information of the processed product through the numerical control host 2, then guiding the information into an engraving pattern library, storing the engraving pattern library, selecting the engraving pattern, fitting the engraving pattern and the product information, correcting the contour curve, and guiding the corrected contour curve into the multi-axis engraving machine 3.

S2, after the multi-axis numerical control engraving machine is adjusted, the product is placed in the processing shell 11, so that the product corresponds to the two clamping plates 19, the motor 12 is controlled to operate, the motor 12 drives the transmission shaft 17 to rotate, so that the two transmission shafts 17 drive the conveyer belt 15 to perform transmission, the conveyer belt 15 drives the connecting shaft 82 to move through the telescopic rod 84, the product inside the processing case 11 is conveyed, and when the ball 22 is in contact with the right inclined surface of the guide plate 7, so that the guide plate 7 presses the ball 22 to displace, so that the ball 22 pushes the movable rod 20 to move, so that the movable rod 20 compresses the spring 9, and drives the clamping plates 19 to move, so that the two clamping plates 19 are close to each other to clamp and position the product, when the position of the product corresponds to the position of the multi-axis engraving machine 3, the motor 12 is stopped, and at this time, the multi-axis engraving machine 3 is controlled to perform the engraving operation of the product according to the program of the numerical control host 2.

S3, after the product is processed, the motor 12 continues to operate, the conveyer belt 15 continues to control the product in the processing shell 11 to convey, when the connecting shaft 82 moves to the inclined surface of the fixed plate 6, the connecting shaft 82 is caused to move up along the inclined surface of the fixed plate 6, under the action of the telescopic rod 84, the processing shell 11 drives the product to move upwards, and when the gear 81 is engaged with the toothed plate 10, so that the gear 81 rotates, the gear 81 drives the connecting shaft 82 to rotate, the connecting shaft 82 drives the processing shell 11 to rotate, the waste materials in the processing shell 11 can be dumped and discharged, and when the ball 22 is disengaged from the guide plate 7, the elastic force of the spring 9 can drive the movable rod 20 to move, so that the movable rod 20 can drive the two clamping plates 19 to move away from each other, so that the product can be automatically loosened and taken out, or the product enters the next procedure, and simultaneously, the processing shell 11 at the other processing position can perform the work to be processed corresponding to the position of the multi-axis engraving machine 3.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.