CN212325278U - Automatic shrimp line removing device - Google Patents

Automatic shrimp line removing device Download PDF

Info

Publication number
CN212325278U
CN212325278U CN202020775617.1U CN202020775617U CN212325278U CN 212325278 U CN212325278 U CN 212325278U CN 202020775617 U CN202020775617 U CN 202020775617U CN 212325278 U CN212325278 U CN 212325278U
Authority
CN
China
Prior art keywords
shrimp
cutter
fixed
chain
bevel gear
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.)
Expired - Fee Related
Application number
CN202020775617.1U
Other languages
Chinese (zh)
Inventor
高兴文
金亦康
胡明
李健
赵德明
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 University of Technology ZJUT
Original Assignee
Zhejiang University of Technology ZJUT
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 University of Technology ZJUT filed Critical Zhejiang University of Technology ZJUT
Priority to CN202020775617.1U priority Critical patent/CN212325278U/en
Application granted granted Critical
Publication of CN212325278U publication Critical patent/CN212325278U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Processing Of Meat And Fish (AREA)

Abstract

The utility model discloses an automatic remove device of shrimp line. The labor intensity of manually removing the shrimp lines is high, and the efficiency is low. The utility model comprises a framework, a bevel gear transmission mechanism, a shrimp feeding mechanism and a shrimp wire removing mechanism; the shrimp wire removing mechanism comprises a main shaft, a bearing turntable, an adjustable clamp, an end face cam mechanism, a cutter, a first direct current speed reducing motor and a second direct current speed reducing motor. The utility model can automatically remove the shrimp line; the two radial plates and the two sets of adjustable clamps alternately and circularly work, so that the efficiency of the shrimp wire removing operation is further improved; the positioning groove and the guide roller have double positioning functions, so that the shrimp wire can accurately align to the circular blade, and the reliability of the shrimp wire removing operation is improved; the bearing rotary table is ingeniously matched with the shrimp feeding mechanism in the process of feeding shrimps efficiently through the design of the two radial plates and the two anti-collision openings, so that collision of shrimps is avoided.

Description

Automatic shrimp line removing device
Technical Field
The utility model belongs to the technical field of machinery, concretely relates to automatic remove device of shrimp line.
Background
Shrimp is rich in protein, and has low fat and low calorie. However, the shrimp lines on the backs of the shrimps can affect the eating taste and the health, and for places such as restaurants and the like needing to treat the shrimps in large batch, the manual removal of the shrimp lines has high labor intensity and low efficiency, and the food sanitation can not be guaranteed.
Disclosure of Invention
The utility model aims at providing a can accomplish safely, high-efficient the automatic remove device of shrimp line of getting rid of shrimp line work to prior art not enough.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model discloses a framework, bevel gear drive mechanism, advance shrimp mechanism and shrimp line and get rid of the mechanism. The shrimp feeding mechanism comprises a chain transmission mechanism and a shrimp carrying groove; the chain transmission mechanism comprises a chain with lugs and a chain wheel; the driving shaft and the driven shaft are arranged at intervals and are supported on the framework through bearings; the two chain wheels are respectively fixed on the driving shaft and the driven shaft and are connected through a chain with lugs; the chain with the ears is evenly provided with a plurality of shrimp carrying grooves, and each shrimp carrying groove is fixed with one of the chain links of the chain with the ears.
The shrimp wire removing mechanism comprises a main shaft, a bearing turntable, an adjustable clamp, an end face cam mechanism, a cutter, a first direct current speed reducing motor and a second direct current speed reducing motor. The main shaft is connected with an output shaft of the direct current speed reducing motor I through a coupler and is connected with a driving shaft of the shrimp feeding mechanism through a bevel gear transmission mechanism; the bearing turntable comprises a central fixing plate and two radial plates which are integrally formed; the central fixing plate is fixed on the main shaft; the circumferential intervals of the two sides of the two radial plates form anti-collision openings; the arc surface of the radial plate is provided with a positioning groove; the two adjustable clamps are positioned in different anti-collision ports and are fixedly connected with the two radial plates of the bearing turntable respectively; the end face cam mechanism comprises an end face cam and a bearing roller; two movable clamping jaws of the adjustable clamp and two bearing rollers respectively form a rotating pair, and the rotating axes of the two rotating pairs are parallel and are perpendicular to the axis of the main shaft; the two end cams are respectively arranged at two sides of the bearing turntable and respectively form cam pairs with the two bearing rollers; the end cam is fixed on the framework; the cutter is fixed on a cutter shaft, and the cutter shaft is connected with an output shaft of the direct-current speed reduction motor II through a coupler; the bases of the direct-current speed reduction motor I and the direct-current speed reduction motor II are fixed on the framework; the central axis of the cutter is parallel to the central axis of the bearing turntable; the circular blade of the cutter is aligned with the symmetrical surfaces of the two side walls of the positioning groove on the bearing turntable.
The guide roller is hinged on the framework and is arranged close to the bearing turntable; the central axis of the guide roller is parallel to the central axis of the cutter, and the two outer end faces of the guide roller are symmetrically arranged relative to the circular blade of the cutter.
Each chain link of the chain with the lugs is fixed with the lug; the shrimp carrying grooves are fixed on the ear pieces.
The bevel gear transmission mechanism comprises a driven bevel gear and a driving bevel gear; the driving bevel gear is fixed on the driving shaft; the driven bevel gear is fixed on the main shaft and is meshed with the driving bevel gear.
The adjustable clamp comprises a movable clamping jaw, a clamp seat body, a compression spring and a torsion spring; the clamp seat body is fixed with the spoke plate; the two movable clamping jaws are oppositely arranged; the through hole at one end of the movable clamping jaw is connected with the through hole of the clamp base body through a bolt and a nut to form a revolute pair, and the clamping plate is fixed at the other end of the movable clamping jaw; a torsion spring is sleeved on the bolt and provided with a pretightening force; two studs fixed on two sides of the clamp seat body penetrate through the through holes in the middle parts of the two movable clamping jaws and are respectively connected with a nut; the stud is sleeved with a compression spring.
The cutter comprises a circular blade and a circular brush piece; the circular blade is fixed on the cutter shaft; the circular brush piece is fixedly connected with the end face of the circular blade; the end face of the circular brush piece back to the circular blade is provided with an integrally formed bulge.
The circular brush piece along circumference equipartition have a plurality of protruding groups of interval setting, protruding group including a plurality of archs of following the radial interval setting of circular brush piece.
The center distance between the cutter and the bearing rotary table is 3-5 mm larger than the sum of the diameter of the circular blade of the cutter and the diameter of the circular arc surface of the radial plate.
The utility model has the advantages that:
1. the utility model can automatically remove the shrimp line, avoid the damage of the shrimp head and ensure the beauty of the shrimp; meanwhile, the labor intensity is reduced, the shrimp line removing efficiency is improved, and cleanness and sanitation of the shrimps are guaranteed when the shrimps are removed.
2. The two radial plates and the two sets of adjustable clamps of the utility model alternately and circularly work, thereby further improving the efficiency of the shrimp wire removing operation; the positioning groove and the guide roller have double positioning functions, so that the shrimp wire can accurately align to the circular blade, and the reliability of the shrimp wire removing operation is improved; the bearing rotary table is ingeniously matched with the shrimp feeding mechanism in the process of feeding shrimps efficiently through the design of the two radial plates and the two anti-collision openings, so that collision of shrimps is avoided.
3. The utility model discloses an adjustable anchor clamps's regulation, the work is got rid of to the shrimp line that can be applicable to the great shrimp of size difference.
4. The utility model discloses only need two powers, just realized the full-automatic work of getting rid of shrimp line, simple structure, the reliable operation.
Drawings
Fig. 1 is a perspective view of the overall structure of the automatic shrimp wire removing device of the present invention.
Fig. 2 is a perspective view of the structure of the shrimp feeding mechanism of the present invention.
Fig. 3 is a schematic structural view of the middle shrimp wire removing mechanism of the present invention.
Fig. 4 is a schematic structural view of the adjustable clamp of the present invention.
Fig. 5 is a top view of the automatic shrimp wire removing device of the present invention.
Fig. 6 is a right side view of fig. 5.
Fig. 7 is a schematic diagram of the relative positions of the middle shrimp and the bearing turntable.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, 5 and 6, the automatic shrimp wire removing apparatus includes a frame 25, a bevel gear transmission 26, a shrimp feeding mechanism 27 and a shrimp wire removing mechanism 28.
Referring to fig. 2, the shrimp feeding mechanism 27 includes a chain transmission mechanism 29 and a shrimp carrying tank 1; the chain transmission mechanism 29 comprises a lug chain 2 and a chain wheel 3; the driving shaft and the driven shaft are arranged at intervals and are supported on the framework 25 through bearings; the two chain wheels 3 are respectively fixed on the driving shaft and the driven shaft and are connected through a chain 2 with lugs (each chain link is fixed with a lug); a plurality of shrimp carrying grooves 1 are uniformly distributed on the chain 2 with the ears, and each shrimp carrying groove 1 is fixed with one chain link of the chain 2 with the ears; the chain transmission mechanism 29 is used for realizing the horizontal movement of the shrimps.
Referring to fig. 3, 5 and 7, the shrimp wire removing mechanism 28 includes a main shaft 5, a bearing turntable 6, an adjustable clamp 30, an end cam mechanism 31, a guide roller 15, a cutter 32, a first dc gear motor 4 and a second dc gear motor 16. The main shaft 5 is connected with an output shaft of the direct current speed reducing motor I4 through a coupler and is connected with a driving shaft of the shrimp feeding mechanism 27 through a bevel gear transmission mechanism 26; the bearing rotary table 6 comprises a central fixed plate and two radial plates which are integrally formed; the central fixing plate is fixed on the main shaft 5; the circumferential intervals of the two sides of the two radial plates form anti-collision openings, and the anti-collision openings prevent the next shrimp to be clamped from falling off due to the fact that the next shrimp is touched by the radial plates; the arc surface of the radial plate is provided with a positioning groove for positioning the shrimp body; the two adjustable clamps 30 are positioned in different anti-collision openings and are fixedly connected with the two radial plates of the bearing turntable 6 respectively, and the adjustable clamps 30 and the radial plates can be connected through a first screw 10; the end face cam mechanism 31 controls the adjustable clamp 30 to open and close so as to clamp and discharge the shrimps 24; the end cam mechanism 31 includes an end cam 21 and a bearing roller 14; two movable clamping jaws of the adjustable clamp 30 and the two bearing rollers 14 respectively form a rotating pair, and the rotating axes of the two rotating pairs are parallel and are perpendicular to the axis of the main shaft 5; the two end cams 21 are respectively arranged at two sides of the bearing turntable 6 and respectively form a cam pair with the two bearing rollers 14; the end cam 21 is fixed on the frame 25; the cutter 32 is fixed on the cutter shaft 20, and the cutter shaft 20 is connected with the output shaft of the direct current speed reducing motor II 16 through a coupler; the bases of the first direct-current speed reduction motor 4 and the second direct-current speed reduction motor 16 are fixed on the framework 25; the central axis of the cutter 32 is arranged in parallel with the central axis of the bearing turntable 6; the circular blades of the cutter 32 are aligned with the symmetrical surfaces of the two side walls of the positioning groove on the bearing turntable 6; as the preferred embodiment, because the shrimp bodies are higher than the top of the positioning groove when in the positioning groove and are generally higher by 3-5 mm, the center distance between the cutter 32 and the bearing turntable 6 is set to be larger than the sum of the diameter of the circular blade of the cutter 32 and the diameter of the circular arc surface of the radial plate by k, and the k takes a value in 3-5 mm; as a preferred embodiment, the guide rollers 15 are hinged on the frame 25 and are arranged close to the carrying carousel 6; the central axis of the guide roller 15 is parallel to the central axis of the cutter 32, and the two outer end faces of the guide roller 15 are symmetrically arranged with respect to the circular blade of the cutter 32. The guide rollers 15 serve to ensure the centring of the shrimp 24 when removing the shrimp line, to align the shrimp line with the circular blade of the knife 32 and to prevent the shrimp bodies of the shrimps 24 from falling off the carrying turntable 6 when cutting.
Referring to fig. 4, as a preferred embodiment, the adjustable clamp 30 includes a movable jaw 7, a clamp seat 8, a compression spring 9 and a torsion spring 12; the clamp seat body 8 is connected with the spoke plate through a first screw 10; the two movable clamping jaws 7 are oppositely arranged; a through hole at one end of the movable clamping jaw 7 is connected with a through hole of the clamp base body 8 through a bolt 13 and a nut 11 to form a revolute pair, and a clamping plate is fixed at the other end of the movable clamping jaw; a torsion spring 12 is sleeved on the bolt 13, and the torsion spring 12 is provided with pretightening force; two studs fixed on two sides of the clamp seat body 8 penetrate through holes in the middle of the two movable clamping jaws 7 and are respectively connected with a nut 11; a compression spring 9 is sleeved on the stud; the distance between the clamp seat body 8 and the middle part of the movable clamping jaw 7 is controlled through the nut 11 so as to adjust the gap between the two clamping plates when the two movable clamping jaws 7 clamp, and the adaptability adjustment of shrimps with large size difference is realized.
Referring to fig. 5, as a preferred embodiment, the bevel gear transmission 26 includes a driven bevel gear 22 and a drive bevel gear 23; the driving bevel gear 23 is fixed on the driving shaft; the driven bevel gear 22 is fixed to the main shaft 5 and is engaged with the drive bevel gear 23.
Referring to fig. 3, as a preferred embodiment, the cutter 32 includes a circular blade 17 and a circular brush 18; the circular blade 17 is fixed on the tool shaft 20; the circular brush piece 18 is fixedly connected with the end face of the circular blade 17 through a second screw 19; the round blade 17 is used for cutting the back of the shrimp; the end surface of the circular brush 18 back to the circular blade 17 is provided with an integrally formed bulge for removing the shrimp wire; as a more preferred embodiment, a plurality of protrusion sets arranged at intervals are uniformly distributed along the circumferential direction of the circular brush 18, and the protrusion sets include three protrusions arranged at intervals along the radial direction of the circular brush 18.
The working principle of the automatic shrimp line removing device is as follows:
putting the body of the shrimp 24 into the shrimp carrying groove 1 to expose the head of the shrimp 24 out of the shrimp carrying groove 1; the direct-current speed reducing motor I4 drives the main shaft 5 and the bearing rotary table 6 on the main shaft 5 to rotate, and drives the chain transmission mechanism 29 through the bevel gear transmission mechanism 26, so that the translation of the shrimp carrying groove 1 and the rotation of the bearing rotary table 6 move in a coordinated manner; when one shrimp carrying groove 1 moves to the position of the bearing rotary table 6, one radial plate of the bearing rotary table 6 just rotates from bottom to top to be opposite to the shrimp carrying groove 1, so that two movable clamping jaws 7 of the adjustable clamp 30 fixedly connected to the radial plate are positioned at two sides of the shrimp head; then, as the spoke plate continues to rotate (the rotating angle is smaller), the bearing roller 14 passes through the return segment of the end face cam 21, and the bearing roller 14 drives the two movable clamping jaws 7 to close to clamp the shrimp heads under the acting force of the torsion spring 12; then, when the spoke plate continues to rotate upwards, the shrimp bodies are brought into the positioning grooves of the spoke plate, and when the spoke plate rotates to the position of the guide roller 15, the position of the shrimp bodies is corrected by the guide roller 15, so that the shrimp lines are further positioned to be aligned with the circular blades 17 of the cutter 32; as the web continues to rotate the shrimp 24 to the knife 32 position, the circular blades 17 of the knife 32 back-cut the shrimp while the circular brush 18 removes the shrimp line from the shrimp. Finally, the bearing roller 14 continuously rotates along with the spoke plate and passes through the pushing section of the end face cam 21 to drive the two movable clamping jaws 7 to separate, the movable clamping jaws 7 loosen the heads of the shrimps, and the blanking of the shrimps 24 is completed. At this point, the shrimp wire removing operation is completed.
The two radial plates and the two sets of adjustable clamps 30 of the utility model alternately and circularly work, thereby improving the efficiency of the shrimp wire removing operation; the positioning groove and the guide roller 15 have double positioning functions, so that the shrimp wires can be accurately aligned with the circular blades 17, and the reliability of the shrimp wire removing operation is improved; the bearing rotary table 6 is ingeniously matched with the shrimp feeding mechanism 27 in the process of feeding shrimps to the shrimp feeding mechanism 27 efficiently through the design of the two radial plates and the two anti-collision ports, and collision of shrimps is avoided. The utility model discloses only need two powers, just realized the full-automatic work of getting rid of shrimp line.

Claims (8)

1. Automatic shrimp line removing device, including framework, bevel gear drive mechanism, advance shrimp mechanism and shrimp line removing device, its characterized in that: the shrimp feeding mechanism comprises a chain transmission mechanism and a shrimp carrying groove; the chain transmission mechanism comprises a chain with lugs and a chain wheel; the driving shaft and the driven shaft are arranged at intervals and are supported on the framework through bearings; the two chain wheels are respectively fixed on the driving shaft and the driven shaft and are connected through a chain with lugs; a plurality of shrimp carrying grooves are uniformly distributed on the chain with the ears, and each shrimp carrying groove is fixed with one chain link of the chain with the ears;
the shrimp wire removing mechanism comprises a main shaft, a bearing turntable, an adjustable clamp, an end face cam mechanism, a cutter, a first direct current speed reducing motor and a second direct current speed reducing motor; the main shaft is connected with an output shaft of the direct current speed reducing motor I through a coupler and is connected with a driving shaft of the shrimp feeding mechanism through a bevel gear transmission mechanism; the bearing turntable comprises a central fixing plate and two radial plates which are integrally formed; the central fixing plate is fixed on the main shaft; the circumferential intervals of the two sides of the two radial plates form anti-collision openings; the arc surface of the radial plate is provided with a positioning groove; the two adjustable clamps are positioned in different anti-collision ports and are fixedly connected with the two radial plates of the bearing turntable respectively; the end face cam mechanism comprises an end face cam and a bearing roller; two movable clamping jaws of the adjustable clamp and two bearing rollers respectively form a rotating pair, and the rotating axes of the two rotating pairs are parallel and are perpendicular to the axis of the main shaft; the two end cams are respectively arranged at two sides of the bearing turntable and respectively form cam pairs with the two bearing rollers; the end cam is fixed on the framework; the cutter is fixed on a cutter shaft, and the cutter shaft is connected with an output shaft of the direct-current speed reduction motor II through a coupler; the bases of the direct-current speed reduction motor I and the direct-current speed reduction motor II are fixed on the framework; the central axis of the cutter is parallel to the central axis of the bearing turntable; the circular blade of the cutter is aligned with the symmetrical surfaces of the two side walls of the positioning groove on the bearing turntable.
2. The automatic shrimp wire removing apparatus as claimed in claim 1, wherein: the guide roller is hinged on the framework and is arranged close to the bearing turntable; the central axis of the guide roller is parallel to the central axis of the cutter, and the two outer end faces of the guide roller are symmetrically arranged relative to the circular blade of the cutter.
3. The automatic shrimp wire removing apparatus as claimed in claim 1 or 2, wherein: each chain link of the chain with the lugs is fixed with the lug; the shrimp carrying grooves are fixed on the ear pieces.
4. The automatic shrimp wire removing apparatus as claimed in claim 1 or 2, wherein: the bevel gear transmission mechanism comprises a driven bevel gear and a driving bevel gear; the driving bevel gear is fixed on the driving shaft; the driven bevel gear is fixed on the main shaft and is meshed with the driving bevel gear.
5. The automatic shrimp wire removing apparatus as claimed in claim 1 or 2, wherein: the adjustable clamp comprises a movable clamping jaw, a clamp seat body, a compression spring and a torsion spring; the clamp seat body is fixed with the spoke plate; the two movable clamping jaws are oppositely arranged; the through hole at one end of the movable clamping jaw is connected with the through hole of the clamp base body through a bolt and a nut to form a revolute pair, and the clamping plate is fixed at the other end of the movable clamping jaw; a torsion spring is sleeved on the bolt and provided with a pretightening force; two studs fixed on two sides of the clamp seat body penetrate through the through holes in the middle parts of the two movable clamping jaws and are respectively connected with a nut; the stud is sleeved with a compression spring.
6. The automatic shrimp wire removing apparatus as claimed in claim 1 or 2, wherein: the cutter comprises a circular blade and a circular brush piece; the circular blade is fixed on the cutter shaft; the circular brush piece is fixedly connected with the end face of the circular blade; the end face of the circular brush piece back to the circular blade is provided with an integrally formed bulge.
7. The automatic shrimp wire removing apparatus as claimed in claim 6, wherein: the circular brush piece along circumference equipartition have a plurality of protruding groups of interval setting, protruding group including a plurality of archs of following the radial interval setting of circular brush piece.
8. The automatic shrimp wire removing apparatus as claimed in claim 1 or 2, wherein: the center distance between the cutter and the bearing rotary table is 3-5 mm larger than the sum of the diameter of the circular blade of the cutter and the diameter of the circular arc surface of the radial plate.
CN202020775617.1U 2020-05-12 2020-05-12 Automatic shrimp line removing device Expired - Fee Related CN212325278U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020775617.1U CN212325278U (en) 2020-05-12 2020-05-12 Automatic shrimp line removing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020775617.1U CN212325278U (en) 2020-05-12 2020-05-12 Automatic shrimp line removing device

Publications (1)

Publication Number Publication Date
CN212325278U true CN212325278U (en) 2021-01-12

Family

ID=74079969

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020775617.1U Expired - Fee Related CN212325278U (en) 2020-05-12 2020-05-12 Automatic shrimp line removing device

Country Status (1)

Country Link
CN (1) CN212325278U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112868741A (en) * 2021-01-21 2021-06-01 贾双双 Hanging and pressing type shrimp line removing device for prawn processing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112868741A (en) * 2021-01-21 2021-06-01 贾双双 Hanging and pressing type shrimp line removing device for prawn processing

Similar Documents

Publication Publication Date Title
CN110890722B (en) Insulated conductor electrified peeling device
WO2020155556A1 (en) Electromechanical double-bladed fruit and vegetable peeling and cutting machine and processing method
US20170182614A1 (en) Composite wheel deburring device
US11904434B2 (en) Variable size wheel deburring device
US20170209976A1 (en) Size-adjustable adaptive online wheel deburring device
CN212325278U (en) Automatic shrimp line removing device
CN110574937B (en) Multi-station coconut peeling equipment
CN110731516B (en) Chinese chestnut thorn shell removing method
CN107668166B (en) Automatic rotating disc type scallop shell opening and scallop column taking device
CN111449120B (en) Automatic shrimp wire removing device and shrimp wire removing method thereof
CN108937512B (en) Sugarcane equipment of peeling fast
CN211278604U (en) Bean curd cutting device
CN104589386A (en) Rubber slitting device
CN210519970U (en) Integral whole body fish scale removing and killing machine
CN110301661B (en) Garlic root pruning device and root pruning method thereof
CN210989601U (en) Pineapple peeling and picking integrated machine
CN109176626B (en) Electric vegetable-block slitter
CN111035024A (en) Coconut removes coconut palm shell chestnut peeling machine
CN212185046U (en) Coconut removes coconut palm shell chestnut peeling machine
CN108637733A (en) A kind of cutting machine for preventing welded tube from deviating
CN218925761U (en) Cylinder radial forming mechanism
CN215548907U (en) Bamboo shoot processing is with quick slitting dissection device
CN213796724U (en) Be used for salted product high efficiency to shred slicer
CN215392806U (en) Aluminum plate processing is with dividing strip machine
CN215511213U (en) Slicing device for frozen aquatic product processing

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20210112