阅读说明：本技术 一种具有除杂功能的传送设备 (Conveying equipment with impurity removal function ) 是由 李桂华 于 2020-05-09 设计创作，主要内容包括：本发明涉及一种具有除杂功能的传送设备,包括收集槽、电机、传送带、两个滚筒和两个安装板,还包括除杂机构和筛选机构,所述除杂机构包括支撑板、升降块、驱动组件、两个滑杆、两个刮板、两个推杆、至少两个第一永磁铁和至少两个凹槽,所述筛选机构包括传动组件、驱动轴、两个安装轴承和至少两个动力板,所述驱动组件包括第二永磁铁、电磁铁和弹性绳,所述传动组件包括支撑轴、第一齿轮、第二齿轮和摩擦盘,该具有除杂功能的传送设备中,通过除杂机构可以去除食品中的金属杂质,提高了传送设备的实用性,通过筛选机构可以去除食品中的碎屑,进一步提高了传送设备的实用性。(The invention relates to a conveying device with an impurity removing function, which comprises a collecting tank, a motor, a conveying belt, two rollers, two mounting plates, an impurity removing mechanism and a screening mechanism, the impurity removing mechanism comprises a supporting plate, a lifting block, a driving component, two sliding rods, two scraping plates, two push rods, at least two first permanent magnets and at least two grooves, the screening mechanism comprises a transmission assembly, a driving shaft, two mounting bearings and at least two power plates, the driving component comprises a second permanent magnet, an electromagnet and an elastic rope, the transmission component comprises a support shaft, a first gear, a second gear and a friction disc, in the conveying equipment with the impurity removing function, metal impurities in food can be removed through the impurity removing mechanism, the practicability of the conveying equipment is improved, the screening mechanism can remove the scraps in the food, and the practicability of the conveying equipment is further improved.)

1. A conveying device with an impurity removing function comprises a collecting tank (3), a motor (1), a conveying belt (6), two rollers (4) and two mounting plates (2), wherein at least two through holes are uniformly distributed in the conveying belt (6), an opening is formed in the top of the collecting tank (3), the two mounting plates (2) are respectively arranged on two sides of the top end of the collecting tank (3), the two rollers (4) are respectively arranged between the two mounting plates (2), the motor (1) is arranged on one of the mounting plates (2), the motor (1) is in transmission connection with one of the rollers (4), the two rollers (4) are respectively arranged on the inner side of the conveying belt (6), the rollers (4) are in rolling connection with the conveying belt (6), and the conveying device is characterized by further comprising an impurity removing mechanism and a screening mechanism, the impurity removing mechanism is arranged inside the collecting tank (3), the screening mechanism is arranged on the inner side of the conveyor belt (6);

the impurity removing mechanism comprises a supporting plate (19), a lifting block (10), a driving assembly, two sliding rods (21), two scraping plates (17), two push rods (18), at least two first permanent magnets (7) and at least two grooves (5), wherein the supporting plate (19) is arranged on one side, close to the accommodating groove, of the conveying belt (6), the sliding rods (21) are perpendicular to the supporting plate (19), the supporting plate (19) is fixedly connected with the inner wall of the accommodating groove through the two sliding rods (21), two through holes are formed in the lifting block (10), the two sliding rods (21) penetrate through the lifting block (10), the lifting block (10) is slidably connected with the sliding rods (21), the driving assembly is arranged on the supporting plate (19), one sides of the two scraping plates (17) are hinged to the two sides of the supporting plate (19) respectively, the other sides of the two scraping plates (17) are abutted to one side, close to the collecting groove (3), of the conveying belt (6), the first permanent magnets (7) are arranged on the inner side of the conveyor belt (6), the grooves (5) are respectively and uniformly arranged on the peripheries of the two rollers (4) in the circumferential direction, the first permanent magnets (7) are matched with the grooves (5), the first permanent magnets (7) are arranged in the grooves (5) abutted to the conveyor belt (6), the push rods (18) are parallel to the slide rods (21), one ends of the two push rods (18) are fixedly connected with the lifting block (10), the other ends of the two push rods (18) are respectively abutted to one sides, far away from the conveyor belt (6), of the two scrapers (17), and the push rods (18) are in sliding connection with the scrapers (17);

screening mechanism includes drive assembly, drive shaft (16), two installation bearing (15) and two at least power board (8), drive shaft (16) set up the inboard at conveyer belt (6), the both ends of drive shaft (16) are all connected with mounting panel (2) through installation bearing (15), the one end of drive shaft (16) is passed through drive assembly and is connected with one of them cylinder (4), and the plane at each power board (8) place all coincides with the axis of drive shaft (16), and each power board (8) evenly set up on the periphery of drive shaft (16) round the axis circumference of drive shaft (16).

2. The conveying equipment with the impurity removing function as claimed in claim 1, wherein a control box is arranged on the mounting plate (2), a PLC is arranged inside the control box, a display screen and at least two control keys are arranged on the control box, and the display screen and each control key are electrically connected with the PLC.

3. The conveying device with the impurity removing function according to claim 1, wherein the driving assembly comprises a second permanent magnet (22), an electromagnet (9) and an elastic rope (20), the second permanent magnet (22) is fixedly connected with the lifting block (10), the electromagnet (9) is fixedly connected with the sliding rod (21), the electromagnet (9) and the second permanent magnet (22) are arranged in a facing mode, the second permanent magnet (22) and the electromagnet (9) are mutually attracted, the supporting plate (19) is fixedly connected with the lifting block (10) through the elastic rope (20), and the elastic rope (20) is in a stretching state.

4. The conveying equipment with the impurity removing function according to claim 1, wherein the transmission assembly comprises a support shaft (12), a first gear (13), a second gear (14) and a friction disc (11), both ends of the support shaft (12) are provided with connecting bearings, both ends of the support shaft (12) are respectively connected with the two mounting plates (2) through the connecting bearings, the friction disc (11) and the first gear (13) are fixedly connected with the support shaft (12), the second gear (14) is fixedly connected with one end of a drive shaft (16), the first gear (13) is meshed with the second gear (14), and the periphery of the friction disc (11) is abutted against the periphery of one of the rollers (4).

5. A conveyor with trash removal as in claim 4 wherein the friction disks (11) are coated with rubber pads.

6. A conveyor apparatus with trash removal function according to claim 4, characterized in that the number of teeth of the first gear (13) is greater than the number of teeth of the second gear (14).

7. The conveyor apparatus with trash removal function of claim 1, characterized in that the inner wall of the collecting tank (3) is coated with an anticorrosive coating.

8. A conveyor with impurity removing function as claimed in claim 1, characterized in that the periphery of the roller (4) is provided with anti-slip lines.

9. The transfer apparatus with trash removal function of claim 1, wherein the motor (1) is a servo motor.

10. The transfer apparatus having a trash removal function of claim 1, wherein the slide bar (21) is coated with grease.

Technical Field

The invention relates to the field of intelligent production lines, in particular to conveying equipment with an impurity removal function.

Background

An intelligent production line is a machine for continuously conveying goods on a certain line, which is also called a conveying line or a conveyor. Products according to the delivery series can be broadly divided into: the production line comprises seven types of production lines, namely a belt production line, a plate chain line, a multiple chain line, a plug-in line, a mesh belt line, a suspension line and a roller production line. Generally comprising traction elements, load-bearing members, drive means, tensioning means, direction-changing means, support elements, etc. The assembly line has large conveying capacity and long conveying distance, and can complete a plurality of process operations simultaneously in the conveying process, so the application is very wide.

The conveyer belt is widely used in food production as the component part of wisdom production line, and prior art's conveyer belt is when carrying food, if food inside also has metal impurity, will influence the quality of food, moreover, at the in-process that food was carried, the piece that drops easily on the food, and the piece mixes in food, will reduce the off-the-shelf quality of food production.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the conveying equipment with the impurity removing function is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a conveying device with an impurity removing function comprises a collecting tank, a motor, a conveying belt, two rollers and two mounting plates, wherein at least two through holes are uniformly distributed in the conveying belt, an opening is formed in the top of the collecting tank, the two mounting plates are respectively arranged on two sides of the top end of the collecting tank, the two rollers are arranged between the two mounting plates, the motor is arranged on one of the mounting plates and is in transmission connection with one of the rollers, the two rollers are arranged on the inner side of the conveying belt and are in rolling connection with the conveying belt, the conveying device further comprises an impurity removing mechanism and a screening mechanism, the impurity removing mechanism is arranged in the collecting tank, and the screening mechanism is arranged on the inner side of the conveying belt;

the impurity removing mechanism comprises a supporting plate, a lifting block, a driving assembly, two sliding rods, two scraping plates, two push rods, at least two first permanent magnets and at least two grooves, the supporting plate is arranged on one side, close to the accommodating groove, of the conveying belt, the sliding rods are perpendicular to the supporting plate, the supporting plate is fixedly connected with the inner wall of the inside of the accommodating groove through the two sliding rods, two through holes are formed in the lifting block, the two sliding rods penetrate through the lifting block, the lifting block is in sliding connection with the sliding rods, the driving assembly is arranged on the supporting plate, one sides of the two scraping plates are hinged to the two sides of the supporting plate respectively, the other sides of the two scraping plates are abutted against one side, close to the collecting groove, of the conveying belt, the first permanent magnets are arranged on the inner side of the conveying belt, the grooves are circumferentially and evenly arranged on the peripheries of the, the inner part of each groove abutted to the conveyor belt is provided with a first permanent magnet, the push rods are parallel to the slide rods, one ends of the two push rods are fixedly connected with the lifting block, the other ends of the two push rods are respectively abutted to one sides of the two scraper plates far away from the conveyor belt, and the push rods are connected with the scraper plates in a sliding manner;

screening mechanism includes drive assembly, drive shaft, two installation bearings and two at least power plates, the drive shaft sets up the inboard at the conveyer belt, the both ends of drive shaft all are connected with the mounting panel through the installation bearing, the one end of drive shaft is passed through drive assembly and is connected with one of them cylinder, and the plane at each power plate place all coincides with the axis of drive shaft, and each power plate evenly sets up in the periphery of drive shaft round the axis circumference of drive shaft.

Preferably, in order to improve the degree of automation of conveying equipment, be equipped with the control box on the mounting panel, the inside of control box is equipped with PLC, be equipped with display screen and two at least control button on the control box, display screen and each control button all are connected with PLC electricity.

Preferably, in order to provide power for the lifting block, the driving assembly comprises a second permanent magnet, an electromagnet and an elastic rope, the second permanent magnet is fixedly connected with the lifting block, the electromagnet is fixedly connected with the sliding rod, the electromagnet and the second permanent magnet are arranged in a right-to-right mode, the second permanent magnet and the electromagnet attract each other, the supporting plate is fixedly connected with the lifting block through the elastic rope, and the elastic rope is in a stretching state.

Preferably, in order to provide power for the driving shaft, the transmission assembly comprises a supporting shaft, a first gear, a second gear and a friction disc, wherein connecting bearings are arranged at two ends of the supporting shaft, the two ends of the supporting shaft are respectively connected with the two mounting plates through the connecting bearings, the friction disc and the first gear are fixedly connected with the supporting shaft, the second gear is fixedly connected with one end of the driving shaft, the first gear is meshed with the second gear, and the periphery of the friction disc abuts against the periphery of one of the rollers.

Preferably, the friction disc is wrapped with a rubber pad in order to reduce the chance of the friction disc slipping.

Preferably, the number of teeth of the first gear is larger than the number of teeth of the second gear in order to increase the rotation speed of the drive shaft.

Preferably, in order to prolong the service life of the collecting tank, the inner wall of the collecting tank is coated with an anticorrosive coating.

Preferably, the outer circumference of the drum is provided with anti-slip threads in order to reduce the probability of slippage between the drum and the friction disk.

Preferably, the motor is a servo motor in order to improve the accuracy of the rotational speed control of the drum.

Preferably, the slide bar is coated with grease in order to improve the smoothness of the movement of the elevator block.

The conveying equipment with the impurity removing function has the advantages that metal impurities in food can be removed through the impurity removing mechanism, the practicability of the conveying equipment is improved, compared with the existing impurity removing mechanism, the impurity removing mechanism improves the stability of connection between the conveying belt and the roller through the mutual limiting effect between the first permanent magnet and the groove, the probability of slipping or deviation of the conveying belt is reduced, and not only can debris in the food be removed through the screening mechanism, the practicability of the conveying equipment is further improved.

Drawings

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

FIG. 1 is a schematic structural diagram of a conveying apparatus with a trash removal function according to the present invention;

FIG. 2 is a sectional view of a transfer apparatus having a trash removal function according to the present invention;

FIG. 3 is a schematic structural diagram of a screening mechanism of the conveying apparatus with impurity removing function according to the present invention;

FIG. 4 is a schematic structural diagram of a trash mechanism of a conveying apparatus having a trash removal function according to the present invention;

in the figure: 1. the automatic lifting device comprises a motor, a mounting plate 2, a collecting tank 3, a roller 4, a groove 5, a conveyor belt 6, a first permanent magnet 7, a power plate 8, an electromagnet 9, a lifting block 10, a friction disc 11, a support shaft 12, a first gear 13, a second gear 14, a mounting bearing 15, a driving shaft 16, a scraping plate 17, a push rod 18, a support plate 19, an elastic rope 20, a sliding rod 21 and a second permanent magnet 22.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, a conveying apparatus with an impurity removing function includes a collecting tank 3, a motor 1, a conveyor belt 6, two rollers 4 and two mounting plates 2, wherein at least two through holes are uniformly distributed on the conveyor belt 6, an opening is arranged at the top of the collecting tank 3, the two mounting plates 2 are respectively arranged at two sides of the top end of the collecting tank 3, the two rollers 4 are both arranged between the two mounting plates 2, the motor 1 is arranged on one of the mounting plates 2, the motor 1 is in transmission connection with one of the rollers 4, the two rollers 4 are both arranged at the inner side of the conveyor belt 6, the rollers 4 are in rolling connection with the conveyor belt 6, the conveying apparatus further includes an impurity removing mechanism and a screening mechanism, the impurity removing mechanism is arranged inside the collecting tank 3, and the screening collecting tank mechanism is arranged at the;

the impurity removing mechanism can remove metal impurities in the food, so that the practicability of the conveying equipment is improved, and not only can the screening mechanism be used for removing scraps in the food, but also the practicability of the conveying equipment is further improved;

as shown in fig. 2, the impurity removing mechanism comprises a supporting plate 19, a lifting block 10, a driving assembly, two sliding rods 21, two scraping plates 17, two pushing rods 18, at least two first permanent magnets 7 and at least two grooves 5, wherein the supporting plate 19 is arranged on one side of the conveyor belt 6 close to the accommodating groove, the sliding rods 21 are perpendicular to the supporting plate 19, the supporting plate 19 is fixedly connected with the inner wall of the accommodating groove through the two sliding rods 21, two through holes are arranged in the lifting block 10, the two sliding rods 21 penetrate through the lifting block 10, the lifting block 10 is slidably connected with the sliding rods 21, the driving assembly is arranged on the supporting plate 19, one sides of the two scraping plates 17 are respectively hinged with two sides of the supporting plate 19, the other sides of the two scraping plates 17 are respectively abutted against one side of the conveyor belt 6 close to the collecting groove 3, and the first permanent magnets 7 are arranged on the inner side of, the grooves 5 are respectively and uniformly arranged on the peripheries of the two rollers 4 in the circumferential direction, the first permanent magnets 7 are matched with the grooves 5, the first permanent magnets 7 are arranged inside the grooves 5 which are abutted to the conveyor belt 6 in each groove 5, the push rods 18 are parallel to the slide rods 21, one ends of the two push rods 18 are fixedly connected with the lifting block 10, the other ends of the two push rods 18 are respectively abutted to one sides, far away from the conveyor belt 6, of the two scraper plates 17, and the push rods 18 are in sliding connection with the scraper plates 17;

under the mutual limiting action between the first permanent magnet 7 and the groove 5, the stability of connection between the transmission belt 6 and the roller 4 is improved, the roller 4 is driven to rotate by the motor 1, the transmission belt 6 is driven to move by the roller 4, the metal impurities in food are adsorbed by the suction action of the first permanent magnet 7, then the metal impurities are driven to move to the bottom of the transmission belt 6 along with the transmission belt 6, the stability of the supporting plate 19 is improved by the slide bar 21, the stability of the scraper 17 is further improved, the lifting block 10 is pulled to move upwards by the power assembly, the push rod 18 is pushed by the lifting block 10 to be tightly abutted against the scraper 17, the scraper 17 is tightly abutted against the transmission belt 6, the cleaning effect of the scraper 17 on the transmission belt 6 is improved, the metal impurities on the transmission belt 6 are removed by the scraper 17, the quantity of the metal impurities in the food is reduced, and the practicability of, meanwhile, when the conveyor belt 6 moves forwards and backwards through the two scrapers 17, the conveyor belt 6 can be cleaned, meanwhile, the push rod 18 can be driven by the power assembly to move up and down in a reciprocating manner, and the scrapers 17 are knocked by the push rod 18, so that sundries adhered to the scrapers 17 can be shaken off, and the scrapers 17 are cleaned;

as shown in fig. 3, the screening mechanism comprises a transmission assembly, a driving shaft 16, two mounting bearings 15 and at least two power plates 8, wherein the driving shaft 16 is arranged on the inner side of the conveyor belt 6, two ends of the driving shaft 16 are connected with the mounting plate 2 through the mounting bearings 15, one end of the driving shaft 16 is connected with one roller 4 through the transmission assembly, the plane of each power plate 8 is coincident with the axis of the driving shaft 16, and each power plate 8 is uniformly arranged on the periphery of the driving shaft 16 in the circumferential direction around the axis of the driving shaft 16;

improved drive shaft 16's stability through installation bearing 15, when cylinder 4 rotates, transmission effect through transmission assembly, drive shaft 16 rotates through cylinder 4, make drive shaft 16 need not to set up extra driving source, transfer apparatus's energy-conserving performance has been improved, drive shaft 16 rotates through cylinder 4, then rotate through each power plate 8 of drive shaft 16 drive, then through the air flow around power plate 8 drive shaft 16, the air current pierces through conveyer belt 6 through the through hole on passing through conveyer belt 6, then can blow away the food piece on conveyer belt 6, the quality of food has been improved, transfer apparatus's practicality has been improved.

Preferably, in order to improve the automation degree of the conveying equipment, the mounting plate 2 is provided with a control box, a PLC is arranged in the control box, the control box is provided with a display screen and at least two control keys, and the display screen and the control keys are electrically connected with the PLC;

the PLC is a programmable logic controller, it adopts a kind of programmable memory, it is used for its internal storage program, implement logical operation, sequence control, timing, counting and arithmetic operation, etc. and control various kinds of machinery or production process by digital or analog input/output, it is a computer specially used for industrial control, its hardware structure is basically the same as microcomputer, generally used for the processing of data and receiving and outputting of the order, used for realizing central control, the operator sends the control signal to PLC through the control key, then control the running of the conveyer through PLC, can display the working condition of the conveyer through the display screen at the same time, have improved the automaticity of the conveyer.

As shown in fig. 4, the driving assembly includes a second permanent magnet 22, an electromagnet 9 and an elastic rope 20, the second permanent magnet 22 is fixedly connected with the lifting block 10, the electromagnet 9 is fixedly connected with the sliding rod 21, the electromagnet 9 and the second permanent magnet 22 are arranged opposite to each other, the second permanent magnet 22 and the electromagnet 9 attract each other, the supporting plate 19 is fixedly connected with the lifting block 10 through the elastic rope 20, and the elastic rope 20 is in a stretched state;

when the electromagnet 9 is powered on, the electromagnet 9 drives the second permanent magnet 22 to move downwards, the lifting block 10 is driven to move downwards through the second permanent magnet 22, when the electromagnet 9 is powered off, the lifting block 10 is driven to move upwards through the elastic rope 20, lifting of the lifting block 10 is achieved, and meanwhile when the electromagnet 9 is powered off, the push rod 18 abuts against the scraper 17 through the tensile force of the elastic rope 20, and the scraper 17 is tightly abutted against the conveyor belt 6.

As shown in fig. 3, the transmission assembly includes a support shaft 12, a first gear 13, a second gear 14 and a friction disc 11, both ends of the support shaft 12 are provided with connecting bearings, both ends of the support shaft 12 are respectively connected with the two mounting plates 2 through the connecting bearings, the friction disc 11 and the first gear 13 are both fixedly connected with the support shaft 12, the second gear 14 is fixedly connected with one end of a drive shaft 16, the first gear 13 is engaged with the second gear 14, and the outer periphery of the friction disc 11 abuts against the outer periphery of one of the rollers 4;

the stability of the friction block 11 and the first gear 13 is improved through the support shaft 12, the friction disc 11 is driven to rotate through the action of friction force between the roller 4 and the friction disc 11, the first gear 13 is driven to rotate through the friction disc 11 under the transmission action of the support shaft 12, the second gear 14 is driven to rotate through the first gear 13, and the drive shaft 16 is driven to rotate through the second gear 14.

Preferably, in order to reduce the probability of the friction disc 11 slipping, a rubber pad is wrapped on the friction disc 11;

the friction force between the friction disc 11 and the roller 4 is increased through the rubber pads, and the probability of slipping of the friction disc 11 is reduced.

Preferably, in order to increase the rotation speed of the driving shaft 16, the number of teeth of the first gear 13 is larger than that of the second gear 14;

since the number of teeth of the gear is inversely proportional to the rotation speed, the rotation speed of the second gear 14 is increased by the first gear 13, and the rotation speed of the drive shaft 16 is increased.

Preferably, in order to prolong the service life of the collecting tank 3, the inner wall of the collecting tank 3 is coated with an anticorrosive coating;

the corrosion speed of the collecting tank 3 is slowed down through the anticorrosive coating, and the service life of the collecting tank 3 is prolonged.

Preferably, in order to reduce the probability of slipping between the roller 4 and the friction disc 11, the periphery of the roller 4 is provided with anti-slip threads;

the friction force between the roller 4 and the friction disc 11 is increased through the anti-slip threads, and the slip probability between the roller 4 and the friction disc 11 is reduced.

Preferably, the motor 1 is a servo motor in order to improve the accuracy of the control of the rotation speed of the drum 4.

Preferably, in order to improve the smoothness of the movement of the lifting block 10, the sliding rod 21 is coated with grease;

the friction force between the lifting block 10 and the sliding rod 21 is reduced through the lubricating grease, and the smoothness of the movement of the lifting block 10 is improved.

The roller 4 is driven to rotate by the motor 1, the conveyor belt 6 is driven to move by the roller 4, metal impurities in food are adsorbed by the suction effect of the first permanent magnet 7, then the metal impurities move to the bottom of the conveyor belt 6 along with the conveyor belt 6, the stability of the supporting plate 19 is improved by the slide rod 21, the stability of the scraper 17 is further improved, the lifting block 10 is pulled to move upwards by the power assembly, the push rod 18 is pushed by the lifting block 10 to be tightly abutted against the scraper 17, the scraper 17 is tightly abutted against the conveyor belt 6, the cleaning effect of the scraper 17 on the conveyor belt 6 is improved, the metal impurities on the conveyor belt 6 are removed by the scraper 17, the quantity of the metal impurities in the food is reduced, the practicability of the conveying equipment is improved, when the roller 4 rotates, the driving shaft 16 is driven to rotate by the roller 4 through the transmission effect of the transmission assembly, then drive each power board 8 through drive shaft 16 and rotate, then through power board 8 drive shaft 16 air flow all around, the air current pierces through conveyer belt 6 through the through-hole on conveyer belt 6, then can blow away the food piece on conveyer belt 6, has improved the quality of food, has improved conveying equipment's practicality.

Compared with the prior art, in this transfer apparatus with edulcoration function, can get rid of the metallic impurity in the food through edulcoration mechanism, transfer apparatus's practicality has been improved, compare with current edulcoration mechanism, this edulcoration mechanism is through the spacing action each other between first permanent magnet 7 and the recess 5, the stability that conveyer belt 6 and cylinder 4 are connected has been improved, the probability of conveyer belt 6 emergence skidding or off tracking has been reduced, moreover, can get rid of the piece in the food through screening mechanism, transfer apparatus's practicality has further been improved, compare with current screening mechanism, this screening mechanism has realized the linkage with cylinder 4, the energy-conserving performance of this mechanism has been improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.