CN215833280U - High-speed chopstick defect detector - Google Patents

High-speed chopstick defect detector Download PDF

Info

Publication number
CN215833280U
CN215833280U CN202122152720.8U CN202122152720U CN215833280U CN 215833280 U CN215833280 U CN 215833280U CN 202122152720 U CN202122152720 U CN 202122152720U CN 215833280 U CN215833280 U CN 215833280U
Authority
CN
China
Prior art keywords
chopsticks
chopstick
speed
fixing frame
limiting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202122152720.8U
Other languages
Chinese (zh)
Inventor
章干强
朱周灿
吕岳武
胡佳辰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Juxin Automation Equipment Co ltd
Original Assignee
Zhejiang Juxin Automation Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Juxin Automation Equipment Co ltd filed Critical Zhejiang Juxin Automation Equipment Co ltd
Priority to CN202122152720.8U priority Critical patent/CN215833280U/en
Application granted granted Critical
Publication of CN215833280U publication Critical patent/CN215833280U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Specific Conveyance Elements (AREA)

Abstract

The utility model discloses a high-speed chopstick defect detector, which comprises a feeding rack, a supporting table and a fixing plate, wherein a first material conveying belt is obliquely installed on the feeding rack, one end of the first material conveying belt is fixedly connected with a second material conveying belt, one side of the fixing plate is movably provided with a mounting frame, a pneumatic clamping jaw is fixedly installed on the mounting frame, the pneumatic clamping jaw and the second material conveying belt are correspondingly arranged, a belt conveyor is fixedly installed on the supporting table, a first fixing frame is fixedly installed on the supporting table, a first camera is fixedly installed on the first fixing frame and can detect the upper end of a chopstick, and a second fixing frame is fixedly installed at the lower end of the supporting table. The accuracy of the detection result is improved to a certain extent.

Description

High-speed chopstick defect detector
Technical Field
The utility model belongs to the technical field of defect detection, and particularly relates to a high-speed chopstick defect detector.
Background
The defect detection generally refers to the detection of the surface defects of articles, the surface defect detection adopts the advanced machine vision detection technology to detect the defects such as spots, pits, scratches, color difference, defects and the like on the surface of a workpiece, a defect detection system can automatically detect according to the set technical index requirements and identify the defective parts, and can also automatically sort and eliminate the defects according to needs, a defect detection machine can automatically finish the synchronization of the image acquisition of the workpiece and a camera, automatically detect the defects such as spots, pits, copper points, scratches and the like on the surface of a product, learn and name the types of the defects according to needs, select the types of the defects to be detected according to needs, automatically set the sizes of the defects according to needs, position the defective positions, control a labeling device to identify the printing device, automatically store the images of the defective products, and carry out historical query, the system has the advantages of automatic statistics (good products, defective products, total number and the like), sound and light alarm when abnormal, controllable equipment halt, self-learning function and simple learning process operation.
However, the defect detector in the prior art cannot continuously detect the defects of the chopsticks, the detection efficiency is low, the directions of the chopsticks cannot be adjusted in the detection process, the surfaces of the chopsticks are inconvenient to detect in an all-around manner, and the accuracy of the detection result is reduced to a certain extent.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high-speed chopstick defect detector, which can continuously detect the defects of chopsticks, improves the detection efficiency, can turn over the chopsticks in the detection process, is convenient to detect the surfaces of the chopsticks in an all-around manner, and improves the accuracy of the detection result to a certain extent, so as to solve the problems that the defect detector in the prior art cannot continuously detect the defects of the chopsticks, has low detection efficiency, cannot adjust the orientation of the chopsticks in the detection process, is inconvenient to detect the surfaces of the chopsticks in the all-around manner, and reduces the accuracy of the detection result to a certain extent.
In order to achieve the purpose, the utility model adopts the following technical scheme: a high-speed chopstick defect detector comprises a feeding rack, a supporting table and a fixing plate, wherein a first material conveying belt is obliquely installed on the feeding rack, a second material conveying belt is fixedly connected to one end of the first material conveying belt, a mounting frame is movably arranged on one side of the fixing plate, a pneumatic clamping jaw is fixedly installed on the mounting frame, the pneumatic clamping jaw and the second material conveying belt are correspondingly arranged, a belt conveyor is fixedly installed on the supporting table, a first fixing frame is fixedly installed on the supporting table, a first camera is fixedly installed on the first fixing frame and can detect the upper end of a chopstick, a second fixing frame is fixedly installed at the lower end of the supporting table, a second camera is fixedly installed on the second fixing frame and can detect the lower end of the chopstick, a plurality of groups of conveying mechanisms are fixedly installed on the supporting table, and a turnover mechanism is fixedly installed on the supporting table, the turnover mechanism comprises a third fixing frame, and two sets of gear-lacking wheels are rotatably arranged on one side of the third fixing frame and can drive the chopsticks to rotate ninety degrees.
Preferably, transport mechanism includes the support, the inside of support is rotated and is installed two sets of spacing wheels of second, the internally mounted of support has the link of two sets of oscilaltions, it is provided with first spacing wheel to rotate on the link, first spacing wheel and the alignment of the spacing wheel of second set up.
Preferably, the bracket is provided with a through hole, one end of the connecting frame is slidably mounted inside the through hole, and the end part of the connecting frame is provided with a limiting block.
Preferably, the first limiting wheel and the second limiting wheel are both provided with grooves, the chopsticks are inserted between the two groups of grooves on the first limiting wheel and the second limiting wheel, and the chopsticks are driven to move forwards under the matching of the first limiting wheel and the second limiting wheel.
Preferably, an electric push rod is fixedly mounted on one side of the third fixing frame, one end of a piston rod of the electric push rod is fixedly connected with an L-shaped connecting rod, a rack is fixedly mounted on one side of the connecting rod, and the rack is meshed with the missing gear.
Preferably, a limiting ring is installed on the other side of the third fixing frame, the limiting ring is fixedly connected with the missing gear, and the inner wall of the limiting ring is attached to the side wall of the chopstick.
Preferably, a motor is fixedly mounted on the supporting table through a motor frame, and the motor drives a second limiting wheel to rotate through a belt and a belt pulley.
Preferably, the first fixing frame and the second fixing frame are both provided with two groups, and the two groups of first fixing frames and the two groups of second fixing frames are arranged in a staggered mode.
Preferably, a baffle is fixedly mounted on a rack of the belt conveyor, one end of the baffle is obliquely arranged, and the baffle plays a limiting role in the movement of the chopsticks.
Preferably, a workbench is installed on one side of the supporting table, a detection head is installed on the workbench, and the detection head and the end portion of the second material conveying belt are arranged in an aligned mode.
The utility model has the technical effects and advantages that: compared with the prior art, the high-speed chopstick defect detector provided by the utility model has the following advantages:
according to the utility model, through the design of the first limiting wheel, the second limiting wheel, the groove and the turnover mechanism, the clamping jaw clamps up two chopsticks and places the chopsticks on the belt conveyor, the belt conveyor drives the chopsticks to move forwards, one end of each chopstick moves to the inside of a cavity formed by two groups of grooves on the first limiting wheel and the second limiting wheel to drive the chopsticks to move forwards, as the two groups of first cameras and the two groups of second cameras are arranged in a vertically staggered manner, when the chopsticks move to the position right below the first group of first cameras at the upper end of the supporting table, the upper surface of the first group of first cameras is detected, then the chopsticks continue to move forwards by one distance, the lower surface of the first group of second cameras at the lower end of the supporting table is detected for defects, then one end of each chopstick is inserted into the missing gear and the inner ring of the limiting ring in the supporting table, the electric push rod drives the connecting rod to move, the connecting rod drives the rack to move, the rack drives the missing gear to rotate, the gear-lacking type chopstick detection device has the advantages that the gear-lacking type gear drives the limiting ring to rotate, the limiting ring drives the chopsticks to rotate ninety degrees, the two sides of the chopsticks which are not detected are placed horizontally, another group of cameras carries out defect detection on the upper surface of the chopsticks, one end distance is moved again, another group of second cameras carries out defect detection on the lower surface of the second cameras, the defects of the chopsticks can be detected continuously, the detection efficiency is improved, the chopsticks can be overturned in the detection process, the omnibearing detection is convenient to be carried out on the surface of the chopsticks, and the accuracy of the detection result is improved to a certain extent.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic structural view of a loading frame, a first material conveying belt, a second material conveying belt and a fixing plate according to the present invention;
FIG. 3 is a schematic structural diagram of a first fixing frame, a first camera, a second fixing frame, a second camera and a belt conveyor according to the present invention;
FIG. 4 is a schematic structural diagram of the turnover mechanism of the present invention;
fig. 5 is a schematic structural view of the first limiting wheel and the second limiting wheel of the present invention.
In the figure: 1. a feeding rack; 2. a support table; 3. a belt conveyor; 4. a first material conveying belt; 5. a second material conveying belt; 6. a fixing plate; 7. a mounting frame; 8. a pneumatic clamping jaw; 9. a first fixing frame; 10. a first camera; 11. a second fixing frame; 12. a second camera; 13. a turnover mechanism; 131. a third fixing frame; 132. an electric push rod; 133. a connecting rod; 134. a rack; 135. a gear is missing; 136. a limiting ring; 14. a motor; 15. a baffle plate; 16. a support; 17. a first limit wheel; 18. a second limiting wheel; 19. a groove; 20. a connecting frame; 21. a through hole; 22. a work table; 23. and a detection head.
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. The specific embodiments described herein are merely illustrative of the utility model and do not delimit the utility model. 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.
The utility model provides a high-speed chopstick defect detector as shown in figures 1-5, which comprises a feeding rack 1, a supporting table 2 and a fixing plate 6, wherein a first material conveying belt 4 is obliquely arranged on the feeding rack 1, a conveying belt on the first material conveying belt 4 consists of a plurality of groups of fixing blocks arranged at equal intervals, the fixing block is a cuboid fixing block with a notch, chopsticks are placed in the notch and conveyed forwards, one end of the first material conveying belt 4 is fixedly connected with the second material conveying belt 5, the second material conveying belt 5 is horizontally arranged, the chopsticks can fall on the second material conveying belt 5 from the first material conveying belt 4, a workbench 22 is installed on one side of the supporting platform 2, a detection head 23 is installed on the workbench 22, the detection head 23 is aligned with the end part of the second material conveying belt 5, when the chopsticks move to the end part of the second material conveying belt 5, the detection head 23 can detect the defects of the end part of the chopsticks;
a mounting rack 7 is movably arranged on one side of the fixing plate 6, the moving track of the mounting rack 7 is L-shaped, a pneumatic clamping jaw 8 is fixedly arranged on the mounting rack 7, two chopsticks can be grabbed at one time, the pneumatic clamping jaw 8 and the second material conveying belt 5 are correspondingly arranged, a belt conveyor 3 is fixedly arranged on the supporting table 2, the grabbed chopsticks are placed on the belt conveyor 3 by the pneumatic clamping jaw 8, a baffle plate 15 is fixedly arranged on a rack of the belt conveyor 3, one end of the baffle plate 15 is obliquely arranged, and the baffle plate 15 plays a limiting role in the movement of the chopsticks;
the chopstick detection device comprises a support table 2, a first fixing frame 9, a first camera 10, a second fixing frame 11, a second camera 12, a first camera 12, a second camera 12 and a second camera, wherein the first fixing frame 9 is fixedly installed on the support table 2 and can detect the upper ends of chopsticks, the second fixing frame 11 is fixedly installed at the lower end of the support table 2, the second camera 12 is fixedly installed on the second fixing frame 11 and can detect the lower ends of the chopsticks, the first fixing frame 9 and the second fixing frame 11 are respectively provided with two groups, the two groups of first fixing frames 9 and the two groups of second fixing frames 11 are arranged in a staggered mode, specifically, when the chopsticks are detected, the first group of first cameras 10 detect the upper surfaces of the chopsticks, the first group of second cameras 12 detect the lower surfaces of the chopsticks firstly, after the chopsticks are turned ninety degrees, the second group of first cameras 10 detect the upper surfaces of the chopsticks, and the second group of second cameras 12 detect the lower surfaces of the chopsticks;
a plurality of groups of conveying mechanisms are fixedly arranged on the support table 2 and are convenient for conveying chopsticks forwards, each conveying mechanism comprises a support 16, each support 16 is a U-shaped support, two groups of second limiting wheels 18 are rotatably arranged in the supports 16, connecting columns are fixedly sleeved on the inner rings of the second limiting wheels 18 and are provided with belt pulleys, a motor 14 is fixedly arranged on each connecting column through a motor frame, the motor drives the second limiting wheels 18 to rotate through belts and belt pulleys, the second limiting wheels 18 can drive the chopsticks to move when rotating, two groups of connecting frames 20 capable of ascending and descending are arranged in the supports 16, first limiting wheels 17 are rotatably arranged on the connecting frames 20, the first limiting wheels 17 and the second limiting wheels 18 are arranged in an aligned mode, through holes 21 are formed in the supports 16, one ends of the connecting frames 20 are slidably arranged in the through holes 21, and limit blocks are arranged at the end parts of the connecting frames 20, grooves 19 are respectively arranged on the first limiting wheel 17 and the second limiting wheel 18, the chopsticks are inserted between the two groups of grooves 19 on the first limiting wheel 17 and the second limiting wheel 18, and the chopsticks are driven to move forwards under the cooperation of the first limiting wheel 17 and the second limiting wheel 18;
the turnover mechanism 13 is fixedly mounted on the support table 2, the turnover mechanism 13 comprises a U-shaped third fixing frame 131, two sets of gear-lacking gears 135 are rotatably mounted on one side of the third fixing frame 131, the two sets of gear-lacking gears 135 do not interfere with each other, and can drive chopsticks to rotate ninety degrees to perform omnibearing detection on the chopsticks, two sets of electric push rods 132 are fixedly mounted on one side of the third fixing frame 131, one ends of piston rods of the electric push rods 132 are fixedly connected with an L-shaped connecting rod 133, one side of the connecting rod 133 is fixedly provided with a rack 134, the rack 134 is meshed with the gear-lacking gears 135, the electric push rods 132 drive the connecting rod 133 to move, the connecting rod 133 drives the rack 134 to move, the rack 134 drives the gear-lacking gears 135 to rotate, a limit ring 136 is mounted on the other side of the third fixing frame 131, the limit ring 136 is fixedly connected with the gear-lacking gears 135, the gear-lacking gears 135 drives the limit ring 136 to rotate, the limit ring 136 drives the chopsticks to rotate ninety degrees, the two sides of the chopsticks which are not detected are horizontally placed, the inner wall of the limiting ring 136 is attached to the side wall of the chopsticks, specifically, the inner diameter of the limiting ring 136 is gradually changed, the inner diameter close to one end of the gear 135 is the largest, the inner diameter far away from one end of the gear 135 is the smallest, the inner diameter of the narrowest part of the limiting ring 136 is equal to the diameter of the thickest position of the chopsticks, the chopsticks are conveniently driven to overturn, and the limiting effect is achieved on the movement of the chopsticks.
When the device is used, chopsticks are placed on a first material conveying belt 4, the chopsticks are driven to move obliquely upwards by the first material conveying belt 4 and are conveyed to a second material conveying belt 5, the chopsticks are clamped between chains on the second material conveying belt 5, when the chopsticks move to the end part of the second material conveying belt 5, a detection head 23 detects the end part of the chopsticks, whether the end part of the chopsticks is defective is judged, if the end part of the chopsticks is defective, the chopsticks are rejected, if the end part of the chopsticks is not defective, two chopsticks are clamped by a pneumatic clamping jaw 8 and are placed on a belt conveyor 3, the belt conveyor 3 drives the chopsticks to move forwards, one end of each chopstick moves to the inside of a cavity formed by two groups of grooves 19 on a first limiting wheel 17 and a second limiting wheel 18, the rotating second limiting wheel 18 continues to drive the chopsticks to move forwards, when the chopsticks move to the position under a first group of first camera heads 10 at the upper end of a support platform 2, carrying out defect detection on the upper surface of the support table, then continuously moving the chopsticks forward for a certain distance, and carrying out defect detection on the lower surface of the support table 2 by a group of second cameras 12 at the lower end of the support table;
if no defect exists, the chopsticks continue to move forwards, one end of each chopstick is inserted into the inner ring of the gear wheel 135 and the limiting ring 136 in the turnover mechanism 13, the electric push rod 132 is started, the electric push rod 132 drives the connecting rod 133 to move, the connecting rod 133 drives the rack 134 to move, the rack 134 drives the gear wheel 135 to rotate, the gear wheel 135 drives the limiting ring 136 to rotate, the limiting ring 136 drives the chopsticks to rotate by ninety degrees, two sides of the chopsticks which are not detected are horizontally placed, the chopsticks continue to move forwards under the driving of the first limiting wheel 17 and the second limiting wheel 18 while being turned over, then the other group of first cameras 10 perform defect detection on the upper surfaces of the chopsticks, after one end of the chopsticks are moved for a distance, the other group of second cameras 12 perform defect detection on the lower surfaces of the chopsticks, and the belt conveyor 3 is conveyed into the material receiving mechanism along the same direction.
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 modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims (10)

1. High-speed chopsticks defect detector, including material loading frame (1), brace table (2) and fixed plate (6), its characterized in that: a first material conveying belt (4) is obliquely installed on the feeding rack (1), a second material conveying belt (5) is fixedly connected to one end of the first material conveying belt (4), a mounting frame (7) is movably arranged on one side of the fixing plate (6), a pneumatic clamping jaw (8) is fixedly installed on the mounting frame (7), the pneumatic clamping jaw (8) and the second material conveying belt (5) are correspondingly arranged, a belt conveyor (3) is fixedly installed on the supporting table (2), a first fixing frame (9) is fixedly installed on the supporting table (2), a first camera (10) is fixedly installed on the first fixing frame (9) and can detect the upper ends of the chopsticks, a second fixing frame (11) is fixedly installed at the lower end of the supporting table (2), a second camera (12) is fixedly installed on the second fixing frame (11) and can detect the lower ends of the chopsticks, a plurality of groups of conveying mechanisms are fixedly mounted on the supporting table (2), a turnover mechanism (13) is fixedly mounted on the supporting table (2), the turnover mechanism (13) comprises a third fixing frame (131), and two sets of gear-lacking gears (135) are rotatably mounted on one side of the third fixing frame (131) and can drive chopsticks to rotate ninety degrees.
2. The high-speed chopstick defect detecting machine as recited in claim 1, wherein: transport mechanism includes support (16), the inside rotation of support (16) installs two sets of spacing wheels of second (18), the internally mounted of support (16) has two sets of links (20) of oscilaltion, it is provided with first spacing wheel (17) to rotate on link (20), first spacing wheel (17) and the alignment of the spacing wheel of second (18) set up.
3. The high-speed chopstick defect detecting machine as recited in claim 2, wherein: the support (16) is provided with a through hole (21), one end of the connecting frame (20) is slidably mounted in the through hole (21), and the end of the connecting frame (20) is provided with a limiting block.
4. The high-speed chopstick defect detecting machine as recited in claim 3, wherein: grooves (19) are formed in the first limiting wheel (17) and the second limiting wheel (18), chopsticks are inserted between the two groups of grooves (19) in the first limiting wheel (17) and the second limiting wheel (18), and the chopsticks are driven to move forwards under the matching of the first limiting wheel (17) and the second limiting wheel (18).
5. The high-speed chopstick defect detecting machine as recited in claim 1, wherein: one side fixed mounting of third mount (131) has electric putter (132), electric putter (132) piston rod one end fixedly connected with connecting rod (133) of L shape, one side fixed mounting of connecting rod (133) has rack (134), rack (134) and scarce gear (135) meshing.
6. The high-speed chopstick defect detecting machine as recited in claim 1, wherein: a limiting ring (136) is installed on the other side of the third fixing frame (131), the limiting ring (136) is fixedly connected with the gear lacking wheel (135), and the inner wall of the limiting ring (136) is attached to the side wall of the chopsticks.
7. The high-speed chopstick defect detecting machine as recited in claim 1, wherein: a motor (14) is fixedly mounted on the supporting table (2) through a motor frame, and the motor drives a second limiting wheel (18) to rotate through a belt and a belt pulley.
8. The high-speed chopstick defect detecting machine as recited in claim 1, wherein: the first fixing frame (9) and the second fixing frame (11) are both provided with two groups, and the two groups of first fixing frames (9) and the two groups of second fixing frames (11) are arranged in a staggered mode.
9. The high-speed chopstick defect detecting machine as recited in claim 1, wherein: a baffle (15) is fixedly mounted on a rack of the belt conveyor (3), one end of the baffle (15) is obliquely arranged, and the baffle (15) plays a limiting role in moving chopsticks.
10. The high-speed chopstick defect detecting machine as recited in claim 1, wherein: workstation (22) are installed to one side of brace table (2), install on workstation (22) and detect head (23), detect the tip alignment setting of head (23) and second defeated material area (5).
CN202122152720.8U 2021-09-07 2021-09-07 High-speed chopstick defect detector Active CN215833280U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122152720.8U CN215833280U (en) 2021-09-07 2021-09-07 High-speed chopstick defect detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122152720.8U CN215833280U (en) 2021-09-07 2021-09-07 High-speed chopstick defect detector

Publications (1)

Publication Number Publication Date
CN215833280U true CN215833280U (en) 2022-02-15

Family

ID=80198701

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122152720.8U Active CN215833280U (en) 2021-09-07 2021-09-07 High-speed chopstick defect detector

Country Status (1)

Country Link
CN (1) CN215833280U (en)

Similar Documents

Publication Publication Date Title
CN110893398A (en) Bearing ring surface defect detection device based on machine vision
CN109051843B (en) Automatic unloading pile up neatly device of PCB board
CN107364719B (en) Glass piece material loading conveyor
CN110745531B (en) Automatic arrangement machine
CN111167740B (en) Bearing bush multi-station size intelligent detection system
CN108760760B (en) Full-automatic medicine bottle detection equipment
CN112845177A (en) Box label and automatic appearance detection equipment
CN114839195A (en) Automatic detection line for appearance of cylindrical battery shell
CN215833280U (en) High-speed chopstick defect detector
CN117850077A (en) Backlight unit AOI check out test set
CN113607745A (en) High-speed chopstick defect detector
CN115388958B (en) Multifunctional empty bottle quality online detection system and method based on machine vision
CN115043204B (en) Full-automatic high-speed flexible wobble plate equipment
CN215984419U (en) Bar straightness detection device
CN214703360U (en) Assembly line visual detection equipment
CN113102270A (en) Novel image detection and identification intelligence device
CN108195844B (en) Cylinder outward appearance detection module
CN215985781U (en) Defect detection equipment compatible with multiple products
CN221361307U (en) Transparent mould speckle detection device
CN117783148B (en) Tire appearance detection device and application method thereof
CN221405445U (en) Visual inspection equipment of part
CN111812104B (en) Double-sided detector for 3D copper foil plate
CN220920032U (en) Marking device based on visual recognition
CN220920082U (en) Modularized horizontal sorting machine
CN220838870U (en) Automatic assembly equipment of industrial robot

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant