CN215478748U - Plant fiber cotton yarn strip-shaped slitting equipment - Google Patents

Plant fiber cotton yarn strip-shaped slitting equipment Download PDF

Info

Publication number
CN215478748U
CN215478748U CN202121922989.3U CN202121922989U CN215478748U CN 215478748 U CN215478748 U CN 215478748U CN 202121922989 U CN202121922989 U CN 202121922989U CN 215478748 U CN215478748 U CN 215478748U
Authority
CN
China
Prior art keywords
cotton yarn
support frame
box
workbench
plant fiber
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
CN202121922989.3U
Other languages
Chinese (zh)
Inventor
厉岳华
张从国
威东英
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.)
Shaowu New Generation Household Products Manufacturing Co ltd
Original Assignee
Shaowu New Generation Household Products Manufacturing 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 Shaowu New Generation Household Products Manufacturing Co ltd filed Critical Shaowu New Generation Household Products Manufacturing Co ltd
Priority to CN202121922989.3U priority Critical patent/CN215478748U/en
Application granted granted Critical
Publication of CN215478748U publication Critical patent/CN215478748U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Preliminary Treatment Of Fibers (AREA)

Abstract

The utility model discloses plant fiber cotton yarn strip-shaped slitting equipment which comprises support legs, a workbench and a support frame, wherein the workbench is fixed at the top ends of the support legs, the support frame is fixed at the top end of the workbench, a stepping motor is installed on one side of the support frame, a transmission rod is installed on one side of the stepping motor, blades are installed on the outer sides of the transmission rods, a control plate is installed on one side of the support frame, a scrap removing mechanism is arranged on one side of the support frame and comprises a negative pressure fan, a filter screen, a box door, a box body and a dust suction opening, the box body is arranged on one side of the top end of the workbench, and the negative pressure fan is installed inside the box body. According to the device, the air of the box body is extracted through the negative pressure fan, so that the box body sucks the debris into the box body, meanwhile, the filter screen filters the debris in the air, and the box door is opened to clean the fiber debris, so that the flock cleaning function of the device is realized, the device is kept clean when in use, and the fiber debris is prevented from flying to affect the use of the device.

Description

Plant fiber cotton yarn strip-shaped slitting equipment
Technical Field
The utility model relates to the technical field of cotton yarn slitting, in particular to strip-shaped slitting equipment for plant fiber cotton yarn.
Background
Cotton yarn is a product processed by plant fiber, the processed product is widely applied to the production and life of people, and strip-shaped slitting equipment for the cotton yarn of the plant fiber is required to shorten the width of the cotton yarn in the processing process of the cotton yarn, so that the cotton yarn is convenient to use in different occasions;
chinese patent No. CN211141067U, publication No. 2020, 07, 31, discloses an automatic gauze piece slitting device, which comprises a fixed-length conveying platform, a longitudinal cutting device and a transverse cutting device; the fixed-length conveying platform is a rotary conveying platform, one end of the fixed-length conveying platform is connected with a rolling machine, and the other end of the fixed-length conveying platform is sequentially provided with the longitudinal cutting device and the transverse cutting device. The gauze is conveyed by the fixed-length conveying platform, is cut by the circular high-speed slitting knife of the longitudinal cutting device, is longitudinally slit, and is controlled by the moving motor of the transverse cutting device to transversely cut, so that the slitting work of the gauze pieces is completed. The automatic gauze piece production line has the advantages that manual operation is replaced by automatic equipment, partial working procedures are omitted, and the problems of low yield of gauze piece products and complicated working procedures are solved;
the above prior art solutions have the following drawbacks; device among the above-mentioned technical scheme has the easy clastic defect that produces of cutting cotton yarn when using, and tiny fibre piece flies in the air, and the clearance of being not convenient for influences the cleanness of device, leads to the practicality of device less than.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model aims to provide a plant fiber cotton yarn strip-shaped slitting device, which is used for solving the defect that the conventional plant fiber cotton yarn strip-shaped slitting device is inconvenient to clean scraps.
(II) contents of utility model
In order to solve the technical problems, the utility model provides the following technical scheme: a strip-shaped cutting device for plant fiber cotton yarn comprises support legs, a workbench and a support frame, wherein the workbench is fixed at the top ends of the support legs, a discharge hole is arranged in one side of the workbench, a third guide wheel is arranged in the top end of the workbench, the top end of the third guide wheel is provided with a grinding wheel, the top end of the workbench is provided with a first guide wheel, a support frame is fixed at the top end of the workbench, a stepping motor is installed at one side of the support frame, a transmission rod is arranged at one side of the stepping motor, blades are arranged at the outer sides of the transmission rods, a control plate is arranged at one side of the support frame, one side of the supporting frame is provided with a scrap removing mechanism which comprises a negative pressure fan, a filter screen, a box door, a box body and a dust suction port, the box sets up the one side at the workstation top, the internally mounted of box has negative-pressure air fan.
Preferably, servo motor is installed to one side of first leading wheel, one side of first leading wheel is provided with the second leading wheel, the outside of first leading wheel is provided with limit structure, limit structure includes limiting plate, lead screw, cover shell and splint, the outside at first leading wheel is all established to the limiting plate cover, one side of limiting plate is fixed with the cover shell, and the inside at cover shell both ends is inserted and is equipped with the lead screw, the top of lead screw is fixed with splint.
Preferably, a rotating structure is formed between the screw rod and the clamping plate, and the screw rod extends to the inside of the casing to be connected with the clamping plate.
Preferably, the both sides of bull wheel all are provided with the regulation structure, it includes mount, balancing pole, expanding spring and slider to adjust the structure, the both sides at the bull wheel are all installed to the slider, the balancing pole is equipped with all to the inside both sides of slider, the top of slider is fixed with expanding spring, and expanding spring's outside cover is equipped with the mount.
Preferably, a sliding structure is formed between the balance bar and the sliding block, and the balance bar is symmetrically distributed on the vertical center line of the sliding block.
Preferably, the bottom of negative pressure fan is provided with the filter screen, the dust absorption mouth is installed to one side of box, the internally mounted of box one side has the chamber door.
Preferably, constitute revolution mechanic between filter screen and the box, the transversal infundibulate inclined plane structure of personally submitting that looks sideways at the dust absorption mouth bottom.
(III) advantageous effects
Compared with the prior art, the utility model has the beneficial effects that: this equipment is cut to plant fiber cotton yarn bar-type has not only realized the flock clearance, has realized that cotton yarn is spacing, has realized moreover that cotton yarn compresses tightly:
(1) the air of the box body is extracted through the negative pressure fan, so that the box body sucks the debris into the box body, meanwhile, the filter screen filters the debris in the air, and the box door is opened to clean the fiber debris, so that the flock cleaning function of the device is realized, the device is kept clean when in use, and the fiber debris is prevented from flying to affect the use of the device;
(2) the position of cotton yarn on the surface of the first guide wheel is limited by shifting the limiting plate, then the screw rod is rotated, the screw rod pushes the clamping plate to clamp the first guide wheel to be contacted, and the sleeve shell is fixed with the first guide wheel, so that the cotton yarn limiting function of the device is realized, the cotton yarn moves at the center of the device, and the returned cotton yarn is prevented from slipping off;
(3) promote the slider through expanding spring and drive the loose runner extrusion cotton yarn, rock about preventing when the slider goes up and down through the balancing pole, realized the cotton yarn of this device and compressed tightly the function from this, make the compact structure of cotton yarn, be convenient for cut, improve the practicality of device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic front sectional view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic side view of a cross-sectional structure of the position limiting structure of the present invention;
FIG. 4 is a schematic front sectional view of an adjustment structure according to the present invention;
FIG. 5 is a schematic three-dimensional structure of the chip removing mechanism of the present invention.
The reference numerals in the figures illustrate: 1. a support leg; 2. a work table; 3. a first guide wheel; 4. a limiting structure; 401. a limiting plate; 402. a screw rod; 403. a housing; 404. a splint; 5. a second guide; 6. an adjustment structure; 601. a fixed mount; 602. a balancing pole; 603. a tension spring; 604. a slider; 7. grinding the wheel; 8. a support frame; 9. a transmission rod; 10. a blade; 11. a scrap removing mechanism; 1101. a negative pressure fan; 1102. filtering with a screen; 1103. a box door; 1104. a box body; 1105. a dust suction port; 12. a discharge port; 13. a third guide wheel; 14. a control panel; 15. a servo motor; 16. a stepper motor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-5, an embodiment of the present invention is shown: the utility model provides a plant fiber cotton yarn strip cutting equipment, including stabilizer blade 1, workstation 2 and support frame 8, the top of stabilizer blade 1 is fixed with workstation 2, the internally mounted of workstation 2 one side has discharge gate 12, the internally mounted on workstation 2 top has third leading wheel 13, and the top of third leading wheel 13 is provided with grinding wheel 7, first leading wheel 3 is installed on the top of workstation 2, the top of workstation 2 is fixed with support frame 8, step motor 16 is installed to one side of support frame 8, the model of this step motor 16 can be XC, step motor 16's input passes through wire and control panel 14's output electric connection, and step motor 16's one side installs transfer line 9, blade 10 is all installed to the outside of transfer line 9, control panel 14 is installed to one side of support frame 8, one side of support frame 8 is provided with chip removal mechanism 11, chip removal mechanism 11 includes negative-pressure fan 1101, 866, The box body 1104 is arranged on one side of the top end of the workbench 2, a negative pressure fan 1101 is installed inside the box body 1104, the type of the negative pressure fan 1101 can be BFX-100, the input end of the negative pressure fan 1101 is electrically connected with the output end of the control panel 14 through a lead, the filter screen 1102 is arranged at the bottom end of the negative pressure fan 1101, a dust suction port 1105 is installed on one side of the box body 1104, the box door 1103 is installed inside one side of the box body 1104, a rotating structure is formed between the filter screen 1102 and the box body 1104, the box body 1104 is opened by pulling the box door 1103 to rotate around the box body 1104, the lateral cross section of the bottom end of the dust suction port 1105 is of a funnel-shaped inclined plane structure, and the suction amount of air of the box body 1104 can be increased through the funnel-shaped structure of the dust suction port 1105;
specifically, as shown in fig. 1, 2 and 5, in use, the control board 14 activates the negative pressure fan 1101, so that the negative pressure fan 1101 draws air from the inside of the box 1104, the box 1104 draws the cut air through the dust suction port 1105, the chips generated by cutting are sucked into the inside of the box 1104 together with the air, the filter screen 1102 filters the chips in the air, the clean air is discharged out of the device, the fiber chips are accumulated in the inside of the box 1104, and the fiber chips in the inside of the box 1104 are cleaned by opening the door 1103;
a servo motor 15 is arranged on one side of the first guide wheel 3, the type of the servo motor 15 can be MR-J2S-10A, the input end of the servo motor 15 is electrically connected with the output end of the control panel 14 through a lead, a second guide wheel 5 is arranged on one side of the first guide wheel 3, a limiting structure 4 is arranged on the outer side of the first guide wheel 3, the limiting structure 4 comprises a limiting plate 401, a lead screw 402, a sleeve 403 and a clamping plate 404, the limiting plate 401 is sleeved on the outer side of the first guide wheel 3, the sleeve 403 is fixed on one side of the limiting plate 401, a screw rod 402 is inserted into the two ends of the casing 403, a clamping plate 404 is fixed at the top end of the screw rod 402, a rotating structure is formed between the screw rod 402 and the clamping plate 404, so that the clamping plate 404 cannot be driven to rotate in the process of rotating the filter screen 1102, the screw rod 402 extends into the casing 403 and is connected with the clamping plate 404, and the screw rod 402 can push the clamping plate 404 to move;
specifically, as shown in fig. 1, 2 and 3, in use, the spacing between the two sets of limiting plates 401 is adjusted by shifting the limiting plates 401 left and right, so that the limiting plates 401 limit the position of the cotton yarn on the surface of the first guide wheel 3, and after the position is proper, the screw 402 is rotated to move the screw 402 towards the inside of the sleeve 403 through the engagement of threads, so that the screw 402 pushes the clamping plate 404 to contact with the first guide wheel 3, so that the sleeve 403 is fixed with the first guide wheel 3, and the limiting plates 401 are prevented from sliding;
the adjusting structures 6 are arranged on two sides of the grinding wheel 7, each adjusting structure 6 comprises a fixing frame 601, a balance rod 602, a telescopic spring 603 and a sliding block 604, the sliding blocks 604 are arranged on two sides of the grinding wheel 7, the balance rods 602 are inserted into two sides of the inside of each sliding block 604, the telescopic springs 603 are fixed at the top ends of the sliding blocks 604, the fixing frames 601 are sleeved outside the telescopic springs 603, a sliding structure is formed between the balance rods 602 and the sliding blocks 604, the balance rods 602 are symmetrically distributed on a vertical central line of the sliding blocks 604, and the sliding blocks 604 are prevented from rotating and shaking through the left balance rod 602 and the right balance rod 602;
specifically, as shown in fig. 1, 2 and 4, when the cotton picker is used, the sliding block 604 is pushed by the compressed telescopic spring 603 to move downwards, so that the sliding block 604 drives the grinding wheel 7 to extrude cotton yarns, the structure of the cotton yarns is compact, the cotton yarns are convenient to cut, the sliding block 604 slides on the surface of the balance rod 602, the lifting stability of the sliding block 604 is improved, and the sliding block 604 is prevented from shaking left and right when lifted.
The working principle is as follows: when the device is used, the device is externally connected with a power supply, firstly, the device is transported to a use area, then cotton yarns are pulled to the top end of the first guide wheel 3 and the bottom of the second guide wheel 5, the cotton yarns are pushed to advance by starting the servo motor 15, the cotton yarns are moved to the middle positions of the grinding wheel 7 and the third guide wheel 13, the sliding block 604 is pushed to move downwards by the compressed telescopic spring 603, the sliding block 604 drives the grinding wheel 7 to extrude the cotton yarns, the structure of the cotton yarns is compact, the cutting is convenient, the sliding block 604 slides on the surface of the balance rod 602, the lifting stability of the sliding block 604 is improved, the sliding block 604 is prevented from shaking left and right when lifted, and the device is pressed;
secondly, the single-size cotton yarn moves to the bottom end of the transmission rod 9, the stepping motor 16 is started, the stepping motor 16 drives the blade 10 to cut the cotton yarn through the transmission rod 9, the width of the cotton yarn is shortened, the cut cotton yarn is discharged through the discharge port 12, the negative pressure fan 1101 is started through the control panel 14, the negative pressure fan 1101 extracts air in the box 1104, meanwhile, the box 1104 extracts the cut air through the dust suction port 1105, the chips generated by cutting and the air are sucked into the box 1104, meanwhile, the filter screen 1102 filters the chips in the air, the clean air is discharged out of the device, the fiber chips are accumulated in the box 1104, and the fiber chips in the box 1104 are cleaned by opening the box door 1103 to finish cleaning the fiber chips;
finally, through stirring limiting plate 401 about, adjust the interval of two sets of limiting plates 401, make limiting plate 401 restrict the position of cotton yarn on first leading wheel 3 surface, after the position is suitable, through rotatory lead screw 402, make lead screw 402 pass through the meshing of screw thread to the inside removal of cover 403, make lead screw 402 promote splint 404 and the contact of first leading wheel 3, it is fixed with cover 403 and first leading wheel 3, prevent that limiting plate 401 from sliding, accomplish the fibre to the cotton yarn, the use work of this equipment is cut to plant fiber cotton yarn bar shape is finally accomplished.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (7)

1. The utility model provides an equipment is cut to plant fiber cotton yarn bar, includes stabilizer blade (1), workstation (2) and support frame (8), its characterized in that: a workbench (2) is fixed at the top end of the support leg (1);
a discharge hole (12) is formed in one side of the workbench (2), a third guide wheel (13) is arranged in the top end of the workbench (2), a grinding wheel (7) is arranged at the top end of the third guide wheel (13), a first guide wheel (3) is arranged at the top end of the workbench (2), and a support frame (8) is fixed at the top end of the workbench (2);
step motor (16) are installed to one side of support frame (8), and one side of step motor (16) installs transfer line (9), blade (10) are all installed in the outside of transfer line (9), control panel (14) are installed to one side of support frame (8), one side of support frame (8) is provided with except that bits mechanism (11), it includes negative-pressure air fan (1101), filter screen (1102), chamber door (1103), box (1104) and dust absorption mouth (1105) to remove bits mechanism (11), box (1104) sets up the one side on workstation (2) top, the internally mounted of box (1104) has negative-pressure air fan (1101).
2. The plant fiber cotton yarn strip slitting equipment as claimed in claim 1, wherein: servo motor (15) are installed to one side of first leading wheel (3), one side of first leading wheel (3) is provided with second leading wheel (5), the outside of first leading wheel (3) is provided with limit structure (4), limit structure (4) include limiting plate (401), lead screw (402), cover (403) and splint (404), the outside at first leading wheel (3) is all established in limiting plate (401), one side of limiting plate (401) is fixed with cover (403), and the inside at cover (403) both ends is inserted and is equipped with lead screw (402), the top of lead screw (402) is fixed with splint (404).
3. The plant fiber cotton yarn strip slitting equipment as claimed in claim 2, wherein: the screw rod (402) and the clamping plate (404) form a rotating structure, and the screw rod (402) extends to the interior of the sleeve (403) and is connected with the clamping plate (404).
4. The plant fiber cotton yarn strip slitting equipment as claimed in claim 1, wherein: the both sides of runner (7) all are provided with adjusts structure (6), adjust structure (6) including mount (601), balancing pole (602), expanding spring (603) and slider (604), the both sides in runner (7) are all installed in slider (604), balancing pole (602) are all inserted to the inside both sides of slider (604), the top of slider (604) is fixed with expanding spring (603), and the outside cover of expanding spring (603) is equipped with mount (601).
5. The plant fiber cotton yarn strip slitting equipment as claimed in claim 4, wherein: a sliding structure is formed between the balance rod (602) and the sliding block (604), and the balance rod (602) is symmetrically distributed on the vertical central line of the sliding block (604).
6. The plant fiber cotton yarn strip slitting equipment as claimed in claim 1, wherein: the bottom of negative pressure fan (1101) is provided with filter screen (1102), dust absorption mouth (1105) are installed to one side of box (1104), internally mounted of box (1104) one side has chamber door (1103).
7. The plant fiber cotton yarn strip slitting equipment as claimed in claim 6, wherein: constitute rotational structure between filter screen (1102) and box (1104), the transversal infundibulate inclined plane structure of personally submitting that looks sideways at dust absorption mouth (1105) bottom.
CN202121922989.3U 2021-08-16 2021-08-16 Plant fiber cotton yarn strip-shaped slitting equipment Active CN215478748U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121922989.3U CN215478748U (en) 2021-08-16 2021-08-16 Plant fiber cotton yarn strip-shaped slitting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121922989.3U CN215478748U (en) 2021-08-16 2021-08-16 Plant fiber cotton yarn strip-shaped slitting equipment

Publications (1)

Publication Number Publication Date
CN215478748U true CN215478748U (en) 2022-01-11

Family

ID=79760332

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121922989.3U Active CN215478748U (en) 2021-08-16 2021-08-16 Plant fiber cotton yarn strip-shaped slitting equipment

Country Status (1)

Country Link
CN (1) CN215478748U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118122448A (en) * 2024-05-08 2024-06-04 河北谊诚纤维素有限公司 Cellulose ether raw material treatment device and treatment process
CN118122448B (en) * 2024-05-08 2024-07-02 河北谊诚纤维素有限公司 Cellulose ether raw material treatment device and treatment process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118122448A (en) * 2024-05-08 2024-06-04 河北谊诚纤维素有限公司 Cellulose ether raw material treatment device and treatment process
CN118122448B (en) * 2024-05-08 2024-07-02 河北谊诚纤维素有限公司 Cellulose ether raw material treatment device and treatment process

Similar Documents

Publication Publication Date Title
CN210361716U (en) Plate cutting machine for furniture production
CN215478748U (en) Plant fiber cotton yarn strip-shaped slitting equipment
CN211538494U (en) Motor machine sieving mechanism that shakes
CN218891334U (en) Cutting equipment for plate processing
CN217149610U (en) Woolen sweater fabric surface processing device
CN216040380U (en) School clothes production is with cloth trimming device convenient to location
CN213571273U (en) Cutting machine with pre-cleaning function
CN211916959U (en) Belt cutting device
CN112571479A (en) Printing packing is with high-efficient device of tailorring
CN216585855U (en) Filter cloth weaving processing apparatus
CN218460997U (en) Luggage pull rod cutting machine
CN217262752U (en) Movable type lifting machine for grain planting
CN220279725U (en) Paper cutter for processing color cards
CN219092861U (en) Circuit board cleaning device
CN219174840U (en) Non-woven fabric cleaning device
CN109468820A (en) A kind of textile cloth shear
CN220318137U (en) Carpet flower weaving machine
CN213571285U (en) Gauze mask production is with cutting device with regulatory function
CN219450009U (en) Device for twisting woven yarn
CN215625649U (en) Combined flexible material cutting machine
CN219839884U (en) Anti-flying cotton yarn cutter with safe combed cotton yarn
CN218904012U (en) Discharging mechanism of optical fiber laser cutting machine
CN216688785U (en) Textile material cutting device for spinning
CN220614327U (en) Multifunctional engraving machine
CN218610585U (en) Plate dust remover

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant