CN211052324U - Non-porous riveting device - Google Patents

Non-porous riveting device Download PDF

Info

Publication number
CN211052324U
CN211052324U CN201921380004.1U CN201921380004U CN211052324U CN 211052324 U CN211052324 U CN 211052324U CN 201921380004 U CN201921380004 U CN 201921380004U CN 211052324 U CN211052324 U CN 211052324U
Authority
CN
China
Prior art keywords
plate
punch
riveting
hole
fixed
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
CN201921380004.1U
Other languages
Chinese (zh)
Inventor
陈春荣
陆凯林
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.)
Kunshan Datang Precision Hardware Technology Co ltd
Original Assignee
Kunshan Datang Precision Hardware Technology 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 Kunshan Datang Precision Hardware Technology Co ltd filed Critical Kunshan Datang Precision Hardware Technology Co ltd
Priority to CN201921380004.1U priority Critical patent/CN211052324U/en
Application granted granted Critical
Publication of CN211052324U publication Critical patent/CN211052324U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Punching Or Piercing (AREA)

Abstract

The utility model relates to a sclausura riveting set, including upper die mechanism and lower die mechanism, upper die mechanism includes first locating component, upper punch and is used for taking off the material subassembly with what the upper punch breaks away from riveted product, take off the below that the material subassembly is located first locating component and with first locating component swing joint, should take off and be equipped with the through-hole on the material subassembly, upper punch one end is fixed in first locating component in, the other end is inserted and is located the through-hole of taking off the material subassembly, lower die mechanism includes second locating component and lower punch, be equipped with the edge in the second locating component riveting hole that riveting set's direction of height extends, and this riveting hole is located the upper punch under, the lower punch is fixed in the riveting hole and the lower punch is retracted inside the second locating component. The utility model discloses technology and simple structure, the riveting is firm stable, can be used to the less occasion that perhaps has special technological requirement of spatial position.

Description

Non-porous riveting device
Technical Field
The utility model relates to a riveting set, concretely relates to sclausura riveting set that is used for two product rivets.
Background
The riveting product provides great convenience for the unilateral connection of sheet parts, can accomplish quick effectual connection without the heavy mounting tool, can realize cold-work installation after the surface treatment, and is pollution-free, is the effective substitute product of weld nut, and the riveting technology of present mainstream needs to be bored out the bottom outlet earlier on two connected pieces, just can carry out subsequent riveting technology, consequently has the shortcoming that wastes time and energy and riveting inefficiency.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects, the utility model provides a sclausura riveting set, the device.
The utility model discloses a solve the technical scheme that its technical problem adopted and be:
a non-porous riveting device comprises an upper die mechanism and a lower die mechanism, wherein the upper die mechanism comprises a first positioning assembly, an upper punch and a stripping assembly used for separating the upper punch from a riveted product, the stripping component is positioned below the first positioning component and is movably connected with the first positioning component, the stripping component is provided with a through hole extending along the height direction of the riveting device, one end of the upper punch is fixed in the first positioning component, the other end is inserted in the through hole of the stripping component, and the upper punch is movably arranged along the extending direction of the through hole, the lower die mechanism comprises a second positioning component and a lower punch, a riveting hole extending along the height direction of the riveting device is arranged in the second positioning component, and the riveting hole is positioned right below the upper punch, the lower punch is fixed in the riveting hole and retracted inside the second positioning assembly.
Preferably, the first positioning assembly is sequentially provided with an upper die holder, an upper base plate and an upper clamping plate from high to low, and the upper die holder, the upper base plate and the upper clamping plate are fixedly connected into a whole.
Preferably, take off the material subassembly and include the backstop board, take off flitch and elastic component, the backstop board with take off flitch fixed connection and become integrative and the backstop board is located the top of taking off the flitch, the one end of elastic component is passed in upper padding plate and punch holder after-fixing in the upper die base, and its other end is fixed in the backstop board, and when the elastic component was in natural state, certain clearance has between punch holder and the backstop board.
Preferably, one end of the upper punch is fixed on the upper clamping plate, the other end of the upper punch penetrates through the stop plate and the through hole of the stripper plate, when the elastic piece is in a natural state, the other end of the upper punch is located inside the stripper plate, and when the elastic piece is compressed and the upper clamping plate is attached to the stop plate, the other end of the upper punch protrudes out of the stripper plate and extrudes a product.
Preferably, still be equipped with spacing post and spliced pole in the upper die mechanism, spacing post one end is fixed in the punch holder, and the other end is worn to locate the backstop board and is taken off the flitch and stretch out in taking off the flitch, correspondingly be equipped with the spacing groove on the second locating component, the one end of spliced pole is fixed in and is taken off the flitch, and the other end is worn to locate backstop board, punch holder and upper padding plate and is located in the upper padding plate movably.
Preferably, the second positioning assembly is composed of a lower template, a lower cushion plate, a lower die base, a lower cushion block and a lower supporting plate from high to low, and the lower template, the lower cushion plate, the lower die base, the lower cushion block and the lower supporting plate are fixedly connected into a whole.
Preferably, the riveting hole is arranged in the lower template, the surface of the lower template for placing the product is a lower die surface, one end of the lower punch is fixed on the lower template, the other end of the lower punch is lower than the lower die surface, and a gap is formed between the lower punch and the lower template.
The utility model has the advantages that:
1) the utility model discloses well punch mechanism sets gradually upper die base, upper padding plate, punch holder, backstop board and takes off the flitch from high to low, lower die mechanism sets gradually lower bolster, die holder, lower cushion and bottom plate from high to low, be equipped with the top punch in the upper die mechanism, be equipped with the bottom punch in the lower die mechanism, and the bottom punch indents in the lower bolster and forms the die, during operation, put two products on the lower bolster, the top punch goes out the through-hole and extrudes the product, make the product extrude in the riveting hole and be supported by the bottom punch, thereby accomplish the riveting operation of two products, the utility model discloses utilize the drift to make the product take place plastic deformation and extrude riveting shaping once, need not trompil or take out the hole earlier, convenient and fast, saved the process and practiced thrift the cost, and can increase or reduce the riveting point according to customer's intensity demand, therefore the practicality is strong, compared with the existing riveting device, the riveting device has simple process and structure, is firm and stable in riveting, and can be used in occasions with small spatial positions or special process requirements;
2) the utility model is provided with a stripping component for buffering the impact force of the first positioning component, the stripping component comprises a stop plate, a stripping plate and an elastic component, and the stripping component prevents the interference fit of the upper punch head into a product under the impact of the first positioning component in the riveting process; when the drawing of patterns, the upper punch is under the effect of elastic component, and first locating component drives the upper punch and goes upward, and the punch holder leaves the backstop board to take the upper punch to leave the product in advance, then first locating component drives again and takes off the material subassembly and goes upward, takes off the flitch and leaves the product and finally playback, thereby the protection product can not destroyed by the upper punch, has improved the product percent of pass of this process.
Drawings
FIG. 1 is a schematic view of the structure of the present invention during opening the mold;
FIG. 2 is a schematic structural view after the mold assembly of the present invention is performed;
fig. 3 is a top view of the present invention;
FIG. 4 is a simplified diagram of a part of the structure in the mold closing of the present invention;
FIG. 5 is a simplified diagram of the structure of the rear part of the mold clamping of the present invention;
in the figure: 10-an upper die mechanism, 11-an upper die holder, 12-an upper backing plate, 13-an upper clamping plate, 14-a stop plate, 15-a stripper plate, 16-an upper punch, 17-a through hole, 18-an elastic piece, 19-a limiting column, 21-a connecting column, 30-a lower die mechanism, 31-a lower die plate, 32-a lower backing plate, 33-a lower die holder, 34-a lower cushion block, 35-a lower supporting plate, 36-a lower punch, 37-a riveting hole and 40-a product.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to 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.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Example (b): as shown in fig. 1 to 5, a non-porous riveting device comprises an upper die mechanism 10 and a lower die mechanism 30, wherein the upper die mechanism 10 comprises a first positioning assembly, an upper punch 16 and a stripping assembly for separating the upper punch from a riveted product 40, the stripping assembly is located below the first positioning assembly and movably connected with the first positioning assembly, the stripping assembly is provided with a through hole 17 extending along the height direction of the riveting device, one end of the upper punch 16 is fixed in the first positioning assembly, the other end of the upper punch 16 is inserted in the through hole 17 of the stripping assembly, the upper punch is movably arranged along the extending direction of the through hole, the lower die mechanism 30 comprises a second positioning assembly and a lower punch 36, a riveting hole 37 extending along the height direction of the riveting device is arranged in the second positioning assembly, and the riveting hole is located right below the upper punch, the lower punch 36 is fixed in the rivet pressing hole and retracted inside the second positioning assembly. The upper die mechanism 10 of the utility model is positioned above the lower die mechanism 30, when riveting, the lower die mechanism 30 is fixed, the upper die mechanism is pressed down, when using the riveting device, firstly, the riveted product 40 is placed on the lower die mechanism, the product can be two products with different or same materials, for example, two products are aluminum products or iron products, or one product is aluminum product, the other product is iron product, then the upper die mechanism 10 is driven by a press machine to be pressed down integrally until the stripping component is pressed on the product, the press machine continues to drive the first positioning component to be pressed down, the first positioning component is attached on the stripping component, the upper punch 16 punches out a through hole and extrudes the product, so that the product is extruded into the riveting hole and supported by the lower punch 36, thereby completing the riveting operation of the two products, in order to meet different requirements, the upper punch and the lower punch can be set into different shapes, the utility model utilizes the punch to make the product generate plastic deformation and extrude the product for one-time riveting forming, does not need to open or draw holes first, is convenient and quick, saves working procedures and cost, can increase or reduce riveting points according to the strength requirements of customers, has strong practicability, has simple process and structure compared with the prior riveting device, is firmly and stably riveted, and can be used in occasions with smaller space positions or special process requirements; in the riveting process, under the impact of first locating component, the easy interference fit of upper punch 16 inserts in the product, consequently is equipped with and takes off the material subassembly and cushions first locating component's impact force, and when the drawing of patterns, upper punch 16 leaves the product in advance under the effort of taking off the material subassembly, and then upper die mechanism leaves lower die mechanism again to the protection product can not destroyed by the upper punch, has improved the product percent of pass of this process.
As shown in fig. 1 and 2, the first positioning assembly is sequentially set to an upper die base 11, an upper padding plate 12 and an upper clamping plate 13 from high to low, the upper die base, the upper padding plate and the upper clamping plate are fixedly connected into a whole, the stripper assembly comprises a stop plate 14, a stripper plate 15 and an elastic element 18, the stop plate and the stripper plate are fixedly connected into a whole, the stop plate is located above the stripper plate, one end of the elastic element 18 passes through the upper padding plate and the upper clamping plate and is fixed in the upper die base 11, the other end of the elastic element is fixed on the stop plate 14, and when the elastic element is in a natural state, a certain gap is formed between the upper clamping plate 13 and the stop plate 14.
The upper punch 16 has one end fixed to the upper clamping plate 13 and the other end penetrating through the through holes 17 of the stopper plate 14 and the stripper plate 15, and when the elastic member 18 is in a natural state, the other end of the upper punch 36 is located inside the stripper plate 15, and when the elastic member is compressed and the upper clamping plate is attached to the stopper plate, the other end of the upper punch protrudes from the stripper plate 15 and extrudes the product. One end of an elastic part 18 in the stripping assembly abuts against the upper die base, the other end of the elastic part abuts against the stop plate 14, when the stripping plate is pressed on a product 40, the first positioning assembly is further pressed downwards, the elastic part is compressed until the upper clamping plate is attached to the stop plate, riveting is finished, the press machine stops running, at the moment, the first positioning assembly moves upwards under the action of the restoring force of the elastic part, the upper punch 16 is separated from the product and retracts into a through hole of the stripping plate, then the first positioning assembly drives the stripping assembly to move upwards, and the stripping plate leaves the product and finally returns, so that the integrity of the product in the stripping process is protected; preferably, the elastic member in this embodiment is a spring, and of course, in other embodiments, the elastic member may be further configured as an elastic rubber member, and any other deformation manner under the concept of the present invention is within the protection scope of the present invention.
Still be equipped with spacing post 19 and spliced pole 21 in the upper die mechanism 10, 19 one ends of spacing post are fixed in punch holder 13, and the other end is worn to locate the backstop board and is taken off the flitch and stretch out in taking off the flitch, correspondingly be equipped with the spacing groove on the second locating component, the one end of spliced pole 21 is fixed in and is taken off the flitch, and the other end is worn to locate backstop board, punch holder and upper padding plate and is located in the upper padding plate with moving about. As shown in fig. 1, the upper die base 11, the upper backing plate 12 and the upper clamping plate 13 are fixed together by pins or bolts, the stop plate 14 and the stripper plate 15 are fixed together by pins or bolts, the stability is good, in order to improve the riveting precision of the product, a limit column 19 is arranged in the upper die mechanism, and the other end of the limit column extends out of the stripper plate 15, so when the upper die is pressed down, the limit column 19 is firstly inserted into a limit groove of the lower die mechanism, and a riveting point is limited; in order to further stabilize the connection relation between the first positioning assembly and the stripping assembly, a connecting column 21 is further arranged in the first positioning assembly and the stripping assembly, one end of the connecting column is fixed in the stripping plate, when the stripping plate presses a product, the first positioning assembly continues to move downwards, the other end of the connecting column can stretch into the upper die base and abut against the upper die base, the pressing action is finished at the moment, during the demolding, the connecting column 21 assists the stripping assembly to return to the position together with the first positioning assembly, and a plurality of limiting columns 19 and connecting columns 21 can be arranged according to the size of the riveting device.
As shown in fig. 1 and 2, the second positioning assembly is composed of a lower template 31, a lower cushion plate 32, a lower die holder 33, a lower cushion block 34 and a lower support plate 35 which are arranged from high to low, and the lower template, the lower cushion plate, the lower die holder, the lower cushion block and the lower support plate are fixedly connected into a whole. Lower bolster, die holder, lower cushion and bottom plate pass through pin or bolt fastening together, specifically are that lower bolster, lower bolster and die holder pass through the bolt fastening, and die holder and bottom plate pass through the bolt fastening, and bottom plate pass through the bolt fastening, and this structural stability is good and simple to operate.
As shown in fig. 4-5, the rivet pressing hole 37 is disposed in the lower template 31, the surface of the lower template on which the product is placed is a lower die surface, one end of the lower punch 36 is fixed to the lower template, the other end is lower than the lower die surface, and a gap is formed between the lower punch and the lower template. In this embodiment, the upper punch 16 is used as a male die, and the lower punch 36 and the lower die plate 31 form a female die, the product on the male die side is extruded into the product on the female die side under the action of high pressure, and during the further extrusion process, the product flows plastically to fill the female die, so as to realize the non-porous riveting of the two products.
The utility model discloses an operation process:
at the beginning, a certain gap is formed between the upper clamping plate 13 and the stop plate 14, two products 40 are manually overlapped on the lower die surface of the lower die plate, the press machine is started to drive the upper die mechanism to integrally move downwards, firstly, the limit column 19 in the upper die mechanism is inserted into the limit groove of the lower die mechanism to guide the running direction of the upper die mechanism until the stripper plate 15 is pressed on the products, the first positioning component drives the upper punch to continuously move downwards, at the moment, the stripper component is not moved, the upper die base 11 compresses the elastic component 18, the upper punch 16 punches the through hole 17 and extrudes the products above to deform until the upper clamping plate 13 is attached to the stop plate 14, the products above are extruded to flow into the products below, the products below are plastically deformed to fill the gap between the lower punch 36 and the riveting hole 37, and the press machine stops running; at the moment, the first positioning assembly moves upwards under the action of the restoring force of the elastic piece, so that the upper punch 16 is separated from the product and retracts into the through hole of the stripper plate, then the first positioning assembly drives the stripper plate to move upwards, the stripper plate leaves the product and finally returns to the original position, and the whole riveting process is completed.
It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (7)

1. A nonporous riveting device is characterized in that: the riveting device comprises an upper die mechanism (10) and a lower die mechanism (30), wherein the upper die mechanism (10) comprises a first positioning assembly, an upper punch (16) and a stripping assembly used for separating the upper punch from a riveted product (40), the stripping assembly is positioned below the first positioning assembly and movably connected with the first positioning assembly, a through hole (17) extending along the height direction of the riveting device is formed in the stripping assembly, one end of the upper punch (16) is fixed in the first positioning assembly, the other end of the upper punch is inserted in the through hole (17) of the stripping assembly, the upper punch is movably arranged along the extending direction of the through hole, the lower die mechanism (30) comprises a second positioning assembly and a lower punch (36), a riveting hole (37) extending along the height direction of the riveting device is formed in the second positioning assembly, and the riveting hole is positioned under the upper punch, the lower punch (36) is fixed in the riveting hole and retracted into the second positioning assembly.
2. The imperforate riveting apparatus according to claim 1, wherein: the first positioning assembly is sequentially provided with an upper die base (11), an upper base plate (12) and an upper clamping plate (13) from high to low, and the upper die base, the upper base plate and the upper clamping plate are fixedly connected into a whole.
3. The imperforate riveting apparatus according to claim 2, wherein: the stripper assembly comprises a stop plate (14), a stripper plate (15) and an elastic piece (18), the stop plate and the stripper plate are fixedly connected into a whole, the stop plate is positioned above the stripper plate, one end of the elastic piece (18) penetrates through an upper base plate and an upper clamping plate and then is fixed in an upper die base (11), the other end of the elastic piece is fixed on the stop plate (14), and when the elastic piece is in a natural state, a certain gap is formed between the upper clamping plate (13) and the stop plate (14).
4. A blind riveting apparatus according to claim 3, wherein: one end of the upper punch (16) is fixed on the upper clamping plate (13), the other end of the upper punch penetrates through the stop plate (14) and the through hole (17) of the stripper plate (15), when the elastic piece (18) is in a natural state, the other end of the upper punch (16) is located inside the stripper plate (15), and when the elastic piece is compressed and the upper clamping plate is attached to the stop plate, the other end of the upper punch protrudes out of the stripper plate (15) and extrudes a product.
5. A blind riveting apparatus according to claim 3, wherein: still be equipped with spacing post (19) and spliced pole (21) in last mold mechanism (10), in spacing post (19) one end was fixed in punch holder (13), the other end was worn to locate the backstop board and was stretched out in taking off the flitch with taking off the flitch and stretch out correspondingly be equipped with the spacing groove on the second locating component, the one end of spliced pole (21) is fixed in and is taken off the flitch, and the other end is worn to locate backstop board, punch holder and upper padding plate and is located in the upper padding plate with moving about.
6. The imperforate riveting apparatus according to claim 1, wherein: the second positioning assembly is composed of a lower template (31), a lower cushion plate (32), a lower die base (33), a lower cushion block (34) and a lower supporting plate (35) which are arranged from high to low, and the lower template, the lower cushion plate, the lower die base, the lower cushion block and the lower supporting plate are fixedly connected into a whole.
7. The imperforate riveting apparatus according to claim 6, wherein: the riveting hole (37) is arranged in the lower template (31), the surface of the lower template for placing a product is a lower die surface, one end of the lower punch (36) is fixed on the lower template, the other end of the lower punch is lower than the lower die surface, and a gap is formed between the lower punch and the lower template.
CN201921380004.1U 2019-08-23 2019-08-23 Non-porous riveting device Expired - Fee Related CN211052324U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921380004.1U CN211052324U (en) 2019-08-23 2019-08-23 Non-porous riveting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921380004.1U CN211052324U (en) 2019-08-23 2019-08-23 Non-porous riveting device

Publications (1)

Publication Number Publication Date
CN211052324U true CN211052324U (en) 2020-07-21

Family

ID=71590498

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921380004.1U Expired - Fee Related CN211052324U (en) 2019-08-23 2019-08-23 Non-porous riveting device

Country Status (1)

Country Link
CN (1) CN211052324U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114713727A (en) * 2022-04-15 2022-07-08 荣成歌尔科技有限公司 Riveting tool and processing equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114713727A (en) * 2022-04-15 2022-07-08 荣成歌尔科技有限公司 Riveting tool and processing equipment
CN114713727B (en) * 2022-04-15 2023-11-14 荣成歌尔科技有限公司 Riveting tool and processing equipment

Similar Documents

Publication Publication Date Title
CN201644700U (en) One-time forming and riveting device for steel plate spring clamp
CN211052324U (en) Non-porous riveting device
CN108145786B (en) Novel cutting die capable of automatically discharging waste
CN110421089B (en) Hardware product crimping stamping die
CN209631937U (en) A kind of many types of face processing and forming stamping die of vehicle dormer window guide rail
CN110894560A (en) Novel equidistant punching machine for belt leather
CN215355755U (en) Powerful material returning and flanging die structure for machining stainless steel shell
CN216938245U (en) Novel press and rivet device
CN112719019B (en) Double-side stretching forming method and forming device
CN205165539U (en) Automobile hinge support upgrades continuous mould
CN213915760U (en) Drawing die of automobile exhaust system end cover
CN209849687U (en) Die convenient to discharge annular waste material of tensile member
CN209363404U (en) The stamping system of reinforced support after a kind of middle channel stiffening plate
CN208290521U (en) A kind of relay electric panel room combination head pressing tool
CN218398497U (en) Glue stripping device
CN210059612U (en) Stamping device for wheel house outer plate
CN214866426U (en) Angle adjusting device is used in hardware products production
CN217748945U (en) General type stamping die convenient to drawing of patterns
CN215090066U (en) Material device is prevented jumping by dysmorphism formula lower mould edge of a knife
CN217018435U (en) Press riveting tool and press riveting machine for replacing rivet pulling processing
CN211938682U (en) Flanging die
CN214866533U (en) Anti-tripping device of press machine
CN215431168U (en) Stamping die is used in sheet metal processing
CN214683746U (en) Blanking die
CN211027750U (en) Non-hole riveting die for hard disk cartridge

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: 20200721