CN214133568U - Automatic punching machine capable of automatically pressing and punching - Google Patents

Automatic punching machine capable of automatically pressing and punching Download PDF

Info

Publication number
CN214133568U
CN214133568U CN202023213245.2U CN202023213245U CN214133568U CN 214133568 U CN214133568 U CN 214133568U CN 202023213245 U CN202023213245 U CN 202023213245U CN 214133568 U CN214133568 U CN 214133568U
Authority
CN
China
Prior art keywords
fixedly connected
plate
bottom plate
punching
adjusting
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
CN202023213245.2U
Other languages
Chinese (zh)
Inventor
刘建德
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.)
Foshan Chuanyue Machinery Co ltd
Original Assignee
Foshan Chuanyue Machinery 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 Foshan Chuanyue Machinery Co ltd filed Critical Foshan Chuanyue Machinery Co ltd
Priority to CN202023213245.2U priority Critical patent/CN214133568U/en
Application granted granted Critical
Publication of CN214133568U publication Critical patent/CN214133568U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The utility model discloses an automatic piercing press that can press material and punch a hole automatically, concretely relates to piercing press technical field, comprising a base plate, four corners difference fixedly connected with supporting legs of bottom plate bottom, the top fixedly connected with framework of bottom plate, the intermediate position department of bottom plate bottom one side is provided with the collection structure, one side fixedly connected with pneumatic cylinder on the inside top of framework, it has the hydraulic stem to peg graft in the bottom of pneumatic cylinder. The utility model discloses an evenly be provided with limit structure at the both ends at bottom plate top, the article that will wait to punch a hole is placed in the inside back of blowing groove, carry on spacingly to the article through the limiting plate that sets up in fixed riser one side, prevent that it from squinting when removing, influence the accurate nature that punches a hole, and still can adjust the object of waiting to punch a hole in order to be suitable for different specifications through the threaded connection who constitutes between regulating disc and the regulation pole, effectual improve equipment's suitability, the economic benefits of equipment has been improved.

Description

Automatic punching machine capable of automatically pressing and punching
Technical Field
The utility model relates to a piercing press technical field specifically is an automatic piercing press that can press the material automatically and punch a hole.
Background
The punching machine is a mechanical device which is used for punching a raw material which is well installed and fixed through a special punching die by driving of a power mechanism, the field of application of the punching machine is also more and more extensive along with the progress and development of scientific technology, but the traditional punching machine has low automation degree, still needs manual work to press materials, has high labor cost and low efficiency, and accordingly, the automatic punching machine capable of automatically pressing and punching materials is produced, but the existing automatic punching machine capable of automatically pressing and punching materials still has some defects in the actual use process.
In the process of implementing the present invention, the inventor finds that at least the following problems exist in the prior art and are not solved:
(1) the traditional automatic punching machine capable of automatically pressing and punching cannot stably and uniformly convey raw materials, so that the punching efficiency is low;
(2) the traditional automatic punching machine capable of automatically pressing and punching cannot collect punched metal waste, so that the tidiness of an operation environment is influenced;
(3) traditional automatic punching machine that can press the material automatically and punch a hole can not carry on spacingly to the raw and other materials in the removal, influences the quality of punching a hole easily.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an automatic piercing press that can press the material automatically and punch a hole to it can not be stable even to carry out the problem of carrying to raw and other materials to provide in solving above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an automatic punching machine that can press material and punch a hole automatically, includes the bottom plate, four corners difference fixedly connected with supporting legs of bottom plate bottom, the top fixedly connected with framework of bottom plate, the intermediate position department of bottom plate bottom one side is provided with the collection structure, one side fixedly connected with pneumatic cylinder on the inside top of framework, the hydraulic stem has been pegged graft to the bottom of pneumatic cylinder, one side fixedly connected with blowing groove on bottom plate top, the opposite side fixedly connected with punching groove on bottom plate top, the both ends at bottom plate top evenly are provided with limit structure, the opposite side on the inside top of framework is provided with pushing equipment.
Pushing equipment includes the set casing, the opposite side on the inside top of framework of set casing fixed connection, bottom swing joint between the inside both sides of set casing has the drive shaft, top fixedly connected with gag lever post between the inside both sides of set casing, the bottom fixedly connected with servo motor of set casing one side, one side of drive shaft runs through the bottom of the inside one side of set casing and servo motor's output fixed connection, the outside of drive shaft is provided with the regulating block, the top fixedly connected with slider of regulating block, the bottom fixedly connected with connecting rod of regulating block, the set casing bottom is provided with the preformed groove, the inside in preformed groove is run through to the bottom of connecting rod, the bottom fixedly connected with scraping wings of connecting rod.
Preferably, the limiting rod penetrates through the inside of the sliding block, and a sliding structure is formed between the limiting rod and the sliding block.
Preferably, the collecting structure comprises a collecting groove, a connecting plate, a fixed slide rail, a blanking groove and a slide bar, the collecting groove is arranged on one side of the bottom end of the bottom plate, the two ends of the top of the collecting groove are fixedly connected with the connecting plate respectively, the top of the connecting plate is fixedly connected with the slide bar respectively, the fixed slide rail is fixedly connected with the two ends of one side of the bottom end of the bottom plate respectively, the blanking groove is inserted in the middle position of one side of the bottom end of the bottom plate, and the top end of the blanking groove is communicated with the inside of the punching groove.
Preferably, limit structure comprises fixed riser, adjustment disk, regulation pole and limiting plate, fixed riser fixed connection is respectively at the both ends at bottom plate top, fixed riser's one end is provided with the limiting plate respectively, the intermediate position department of limiting plate one end is fixedly connected with respectively adjusts the pole, fixed riser's opposite side swing joint has the adjustment disk respectively, the inside of fixed riser and adjustment disk is run through respectively to the one end of adjusting the pole.
Preferably, the fixed risers are symmetrically distributed about a vertical centerline of the discharge chute.
Preferably, the outside of adjusting the pole is provided with the external screw thread, the inside of adjusting the dish is provided with the internal thread with external screw thread matched with, constitute threaded connection between regulation pole and the adjusting plate.
Compared with the prior art, the beneficial effects of the utility model are that: the automatic punching machine capable of automatically pressing and punching not only can stably and uniformly convey the raw materials, realize the collection of the waste metal pieces obtained by punching, but also can limit the moving raw materials;
(1) the pushing mechanism is arranged on the other side of the top end in the frame body, after an object to be punched is placed in the feeding groove, the servo motor fixedly connected to one side of the fixed shell is started, the driving shaft is driven by the servo motor to rotate in the fixed shell, the driving shaft drives the adjusting block to move left and right outside the adjusting block while rotating, and the connecting rod drives the pushing plate to be fixed, so that the object is moved, meanwhile, the adjusting block can be limited by a sliding structure formed between a sliding block fixedly connected to the top end of the adjusting block and the limiting rod, the purpose of pushing and punching the object to be punched at a constant speed is achieved, the labor intensity of workers is reduced, the punching efficiency is improved, and the rejection rate is reduced;
(2) the collecting structure is arranged in the middle of one side of the bottom end of the bottom plate, punched metal waste sheets can be guided into the collecting tank arranged on one side of the bottom end of the bottom plate through the discharging groove, so that the purpose of collecting the metal waste sheets is achieved, the processing environment is cleaner and tidier, the collecting tank can be conveniently and quickly detached and replaced through the connection between the sliding strips and the fixed sliding rails after the collecting tank is full of collected metal waste sheets, the structure is simple, the use is very convenient, and the punching processing efficiency is further improved;
(3) evenly be provided with limit structure through the both ends at the bottom plate top, the article that will wait to punch a hole is placed in the inside back of blowing groove, carry on spacingly through setting up the limiting plate in fixed riser one side to the article, prevent it skew when removing, influence the accurate nature of punching a hole, and still can adjust the object of waiting to punch a hole in order to be suitable for different specifications to the distance between the limiting plate through the threaded connection that constitutes between adjustment disc and the regulation pole, effectual improve equipment's suitability, the economic benefits of equipment has been improved.
Drawings
Fig. 1 is a schematic front view of a cross-sectional structure of the present invention;
fig. 2 is an enlarged partial cross-sectional view of the utility model at a in fig. 1;
FIG. 3 is a schematic side view of the collecting structure of the present invention;
fig. 4 is a schematic side view of the limiting structure of the present invention.
In the figure: 1. a base plate; 2. a discharging groove; 3. a frame body; 4. a stationary case; 5. a drive shaft; 6. a limiting rod; 7. reserving a groove; 8. a servo motor; 9. a hydraulic cylinder; 10. a hydraulic lever; 11. punching a hole groove; 12. a collection structure; 1201. collecting tank; 1202. a connecting plate; 1203. fixing the slide rail; 1204. a discharging groove; 1205. A slide bar; 13. supporting legs; 14. a limiting structure; 1401. fixing a vertical plate; 1402. an adjusting disk; 1403. Adjusting a rod; 1404. a limiting plate; 15. a connecting rod; 16. a material pushing plate; 17. an adjusting block; 18. a slide block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1: referring to fig. 1-4, an automatic punching machine capable of automatically pressing and punching comprises a bottom plate 1, wherein four corners of the bottom end of the bottom plate 1 are respectively and fixedly connected with supporting legs 13, the top end of the bottom plate 1 is fixedly connected with a frame body 3, a collecting structure 12 is arranged in the middle of one side of the bottom end of the bottom plate 1, one side of the top end inside the frame body 3 is fixedly connected with a hydraulic cylinder 9, the type of the hydraulic cylinder 9 can be MPT, a hydraulic rod 10 is inserted into the bottom end of the hydraulic cylinder 9, one side of the top end of the bottom plate 1 is fixedly connected with a discharging groove 2, the other side of the top end of the bottom plate 1 is fixedly connected with a punching groove 11, two ends of the top of the bottom plate 1 are uniformly provided with limiting structures 14, and the other side of the top end inside the frame body 3 is provided with a material pushing mechanism;
referring to fig. 1-4, an automatic punching machine capable of automatically pressing and punching further comprises a material pushing mechanism, the material pushing mechanism comprises a fixed shell 4, the fixed shell 4 is fixedly connected to the other side of the top end of the inside of a frame body 3, a driving shaft 5 is movably connected to the bottom between the two sides of the inside of the fixed shell 4, a limiting rod 6 is fixedly connected to the top between the two sides of the inside of the fixed shell 4, a servo motor 8 is fixedly connected to the bottom of one side of the fixed shell 4, the type of the servo motor 8 can be Y90S-2, one side of the driving shaft 5 penetrates through the bottom of one side of the inside of the fixed shell 4 and is fixedly connected with the output end of the servo motor 8, an adjusting block 17 is arranged outside the driving shaft 5, a sliding block 18 is fixedly connected to the top end of the adjusting block 17, a connecting rod 15 is fixedly connected to the bottom end of the adjusting block 17, a reserved groove 7 is arranged at the bottom end of the fixed shell 4, and the bottom end of the connecting rod 15 penetrates through the inside of the reserved groove 7, the bottom end of the connecting rod 15 is fixedly connected with a material pushing plate 16;
the limiting rod 6 penetrates through the inside of the sliding block 18, and a sliding structure is formed between the limiting rod 6 and the sliding block 18;
specifically, as shown in fig. 1 and fig. 2, after an object to be punched is placed in the feeding groove 2, the servo motor 8 fixedly connected to one side of the fixed shell 4 is started, the driving shaft 5 is driven by the servo motor 8 to rotate inside the fixed shell 4, the driving shaft 5 drives the adjusting block 17 to move left and right outside the adjusting block, and the connecting rod 15 drives the material pushing plate 16 to move to a certain extent, so that the object is moved, and meanwhile, the adjusting block 17 can be limited by a sliding structure formed between the sliding block 18 fixedly connected to the top end of the adjusting block 17 and the limiting rod 6, so that the purpose of stably pushing and punching the object to be punched at a constant speed is achieved, the labor intensity of workers is reduced, the punching efficiency is improved, and the rejection rate is reduced.
Example 2: the collecting structure 12 is composed of a collecting groove 1201, a connecting plate 1202, a fixed sliding rail 1203, a blanking groove 1204 and a sliding strip 1205, the collecting groove 1201 is arranged on one side of the bottom end of the bottom plate 1, the connecting plate 1202 is fixedly connected to two ends of the top of the collecting groove 1201 respectively, the sliding strip 1205 is fixedly connected to the top end of the connecting plate 1202 respectively, the fixed sliding rail 1203 is fixedly connected to two ends of one side of the bottom plate 1 respectively, the blanking groove 1204 is inserted in the middle position of one side of the bottom end of the bottom plate 1, and the top end of the blanking groove 1204 is communicated with the inside of the punching groove 11;
specifically, as shown in fig. 1 and fig. 3, can be with the leading-in inside that sets up the collecting vat 1201 in bottom 1 one side of the useless piece of metal that punches a hole through the feed chute 1204 to reach the purpose of collecting the useless piece of metal, make the processing environment cleaner and tidier, and after the collecting vat 1201 is collected fully, still can dismantle the change to the collecting vat 1201 through the convenient and fast that is connected between draw runner 1205 and the fixed slide rail 1203, moreover, the steam generator is simple in structure, it is very convenient to use, further improve the efficiency of the processing of punching a hole.
Example 3: the limiting structure 14 comprises a fixed vertical plate 1401, an adjusting disc 1402, an adjusting rod 1403 and a limiting plate 1404, the fixed vertical plate 1401 is respectively and fixedly connected to two ends of the top of the bottom plate 1, the limiting plate 1404 is respectively arranged at one end of the fixed vertical plate 1401, the adjusting rod 1403 is respectively and fixedly connected to the middle position of one end of the limiting plate 1404, the adjusting disc 1402 is respectively and movably connected to the other side of the fixed vertical plate 1401, and one end of the adjusting rod 1403 penetrates through the fixed vertical plate 1401 and the inside of the adjusting disc 1402 respectively;
the fixed vertical plates 1401 are symmetrically distributed about the vertical center line of the discharging groove 2;
an external thread is arranged outside the adjusting rod 1403, an internal thread matched with the external thread is arranged inside the adjusting disk 1402, and the adjusting rod 1403 is in threaded connection with the adjusting disk 1402;
specifically, as shown in fig. 1 and 4, after the article to be punched is placed inside the discharging chute 2, the article is limited by the limiting plate 1404 arranged on one side of the fixed vertical plate 1401, so that the article is prevented from shifting when moving, the punching accuracy is affected, and the distance between the limiting plates 1404 can be adjusted by the threaded connection formed between the adjusting plate 1402 and the adjusting rod 1403, so that the article to be punched can be suitable for the articles to be punched with different specifications, the applicability of the equipment is effectively improved, and the economic benefit of the equipment is improved.
The working principle is as follows: the utility model discloses when using, at first, the object that will wait to punch a hole is placed into 2 inside backs of blowing groove, start fixed connection at the servo motor 8 of set casing 4 one side, drive shaft 5 rotates in the inside of set casing 4 through servo motor 8, drive adjusting block 17 is controlled in its outside to drive while drive shaft 5 pivoted, and it is certain to drive scraping wings 16 through connecting rod 15 and carry out, thereby reached and carried out the purpose that removes the object, the sliding structure who constitutes simultaneously between slider 18 and the gag lever post 6 on adjusting block 17 top through fixed connection can carry on spacingly to adjusting block 17, thereby realized that the article that treats punching a hole that can stabilize at the uniform velocity promotes the purpose of punching a hole, staff's intensity of labour has been reduced, the efficiency of punching a hole has been improved and the disability rate has been reduced.
Afterwards, can be with the leading-in inside that sets up the collecting vat 1201 in bottom 1 one side of bottom plate of the useless piece of metal that punches a hole through lower silo 1204 to reach the purpose of collecting the useless piece of metal, make the processing environment more clean and tidy, and collect full back when collecting vat 1201, still can dismantle the change to collecting vat 1201 through the convenient and fast that is connected between draw runner 1205 and the fixed slide rail 1203, moreover, the steam generator is simple in structure, it is very convenient to use, further improves the efficiency of the processing of punching a hole.
Finally, will treat that the article that punches a hole places in the inside back of blowing groove 2, carry on spacingly through the limiting plate 1404 that sets up in fixed riser 1401 one side to the article, prevent that it from shifting when removing, influence the accurate nature of punching a hole to still can adjust the object of waiting to punch a hole in order to be suitable for different specifications to the distance between the limiting plate 1404 through the threaded connection that constitutes between adjusting plate 1402 and the regulation pole 1403, effectual improve equipment's suitability, improved the economic benefits of equipment.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. An automatic punching machine capable of automatically pressing and punching comprises a bottom plate (1), and is characterized in that: the four corners of the bottom end of the bottom plate (1) are respectively fixedly connected with supporting legs (13), the top end of the bottom plate (1) is fixedly connected with a frame body (3), a collecting structure (12) is arranged at the middle position of one side of the bottom end of the bottom plate (1), a hydraulic cylinder (9) is fixedly connected to one side of the top end in the frame body (3), a hydraulic rod (10) is inserted into the bottom end of the hydraulic cylinder (9), a discharging groove (2) is fixedly connected to one side of the top end of the bottom plate (1), a punching groove (11) is fixedly connected to the other side of the top end of the bottom plate (1), limiting structures (14) are uniformly arranged at two ends of the top of the bottom plate (1), and a material pushing mechanism is arranged at the other side of the top end in the frame body (3);
the pushing mechanism comprises a fixed shell (4), the fixed shell (4) is fixedly connected to the other side of the top end in the frame body (3), a driving shaft (5) is movably connected to the bottom between the two sides in the fixed shell (4), a limiting rod (6) is fixedly connected to the top between the two sides in the fixed shell (4), a servo motor (8) is fixedly connected to the bottom of one side of the fixed shell (4), one side of the driving shaft (5) penetrates through the bottom of one side in the fixed shell (4) and is fixedly connected with the output end of the servo motor (8), an adjusting block (17) is arranged outside the driving shaft (5), a sliding block (18) is fixedly connected to the top end of the adjusting block (17), a connecting rod (15) is fixedly connected to the bottom end of the adjusting block (17), a reserved groove (7) is arranged at the bottom end of the fixed shell (4), and the bottom end of the connecting rod (15) penetrates through the inside of the reserved groove (7), the bottom end of the connecting rod (15) is fixedly connected with a material pushing plate (16).
2. An automatic punching machine capable of automatic pressing and punching according to claim 1, characterized in that: the limiting rod (6) penetrates through the inside of the sliding block (18), and a sliding structure is formed between the limiting rod (6) and the sliding block (18).
3. An automatic punching machine capable of automatic pressing and punching according to claim 1, characterized in that: the collecting structure (12) is composed of a collecting groove (1201), a connecting plate (1202), a fixed sliding rail (1203), a discharging groove (1204) and a sliding strip (1205), the collecting groove (1201) is arranged on one side of the bottom end of the bottom plate (1), the two ends of the top of the collecting groove (1201) are fixedly connected with the connecting plate (1202) respectively, the top end of the connecting plate (1202) is fixedly connected with the sliding strip (1205) respectively, the fixed sliding rail (1203) is fixedly connected with the two ends of one side of the bottom plate (1) respectively, the discharging groove (1204) is inserted into the middle position of one side of the bottom end of the bottom plate (1), and the top end of the discharging groove (1204) is communicated with the inside of the punching groove (11) in a discharging mode.
4. An automatic punching machine capable of automatic pressing and punching according to claim 1, characterized in that: the limiting structure (14) comprises a fixed vertical plate (1401), an adjusting disc (1402), an adjusting rod (1403) and a limiting plate (1404), wherein the fixed vertical plate (1401) is respectively and fixedly connected to two ends of the top of the bottom plate (1), the limiting plate (1404) is respectively arranged at one end of the fixed vertical plate (1401), the adjusting rod (1403) is respectively and fixedly connected to the middle position of one end of the limiting plate (1404), the adjusting disc (1402) is respectively and movably connected to the other side of the fixed vertical plate (1401), and one end of the adjusting rod (1403) is respectively penetrated through the fixed vertical plate (1401) and the adjusting disc (1402).
5. An automatic punching machine capable of automatic pressing and punching according to claim 4, characterized in that: the fixed vertical plates (1401) are symmetrically distributed about the vertical center line of the discharging groove (2).
6. An automatic punching machine capable of automatic pressing and punching according to claim 4, characterized in that: the outside of the adjusting rod (1403) is provided with an external thread, the inside of the adjusting disk (1402) is provided with an internal thread matched with the external thread, and the adjusting rod (1403) is in threaded connection with the adjusting disk (1402).
CN202023213245.2U 2020-12-28 2020-12-28 Automatic punching machine capable of automatically pressing and punching Expired - Fee Related CN214133568U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023213245.2U CN214133568U (en) 2020-12-28 2020-12-28 Automatic punching machine capable of automatically pressing and punching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023213245.2U CN214133568U (en) 2020-12-28 2020-12-28 Automatic punching machine capable of automatically pressing and punching

Publications (1)

Publication Number Publication Date
CN214133568U true CN214133568U (en) 2021-09-07

Family

ID=77542087

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023213245.2U Expired - Fee Related CN214133568U (en) 2020-12-28 2020-12-28 Automatic punching machine capable of automatically pressing and punching

Country Status (1)

Country Link
CN (1) CN214133568U (en)

Similar Documents

Publication Publication Date Title
CN111841747B (en) Grinding device for ore dressing of reducible dust pollution
CN210452650U (en) Maintenance device for industrial automatic control
CN203853580U (en) Full-automatic drilling machine
CN214133568U (en) Automatic punching machine capable of automatically pressing and punching
CN219900000U (en) Net punching machine with material guiding function
CN217858257U (en) Punch forming machine for producing stainless steel tableware
CN211386522U (en) Stamping die is used in processing of high-speed ladder pressure baffle
CN218926016U (en) Punch press with automatic feeding and taking device
CN215145202U (en) Cutting device for machine manufacturing
CN213826621U (en) C-shaped steel punching device for photovoltaic support production
CN207043427U (en) A kind of metal coiled material cutter device
CN209753776U (en) Novel tubular product feeding device
CN221290462U (en) Steel positioning and punching device for steel processing
CN212554165U (en) Garbage collection subassembly for punch press
CN214819847U (en) Cutting device for semiconductor chip
CN216706129U (en) Intelligent aluminum alloy production equipment
CN220697981U (en) Automatic rotary stamping device for metal products
CN216031298U (en) Perforating device is used in magnet production
CN212858749U (en) Cooling liquid collecting device of inclined numerical control lathe for cutter production
CN221337796U (en) Cutting equipment is used in aluminium sign processing
CN220239981U (en) Automatic wax film forming device
CN215315033U (en) Perforating device is used with deep-processing in clean production of titanium alloy
CN214417414U (en) Novel mechanical stamping device
CN218575645U (en) Automatic change intelligent plate shearing machine
CN211515865U (en) Hardware stamping equipment of quick ejection of compact

Legal Events

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

Granted publication date: 20210907