CN112404598A - Deburring device for through hole of one-side closed or semi-closed space - Google Patents
Deburring device for through hole of one-side closed or semi-closed space Download PDFInfo
- Publication number
- CN112404598A CN112404598A CN202011240938.2A CN202011240938A CN112404598A CN 112404598 A CN112404598 A CN 112404598A CN 202011240938 A CN202011240938 A CN 202011240938A CN 112404598 A CN112404598 A CN 112404598A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- ejector rod
- closed
- pin
- blade
- 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.)
- Pending
Links
- 238000007906 compression Methods 0.000 claims abstract description 19
- 230000006835 compression Effects 0.000 claims abstract description 18
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
The invention provides a deburring device for a through hole in a space with one closed side or a semi-closed side, which comprises a sleeve, a blade, an ejector rod, a compression spring and a torsion spring, wherein the front end of the sleeve is provided with a tool rest, the rear end of the sleeve is screwed with a spring pressing cap, the ejector rod is positioned in the sleeve, the compression spring is sleeved on the rear ejector rod in a penetrating way, the front end and the rear end of the compression spring are respectively contacted with the rear end of the front ejector rod and the front end of the spring pressing cap, the blade is arranged on the frame through a pin shaft, and the. The ejector rod is pulled outwards, the blade rotates under the action of the torsion spring, the position of the tool nose is positioned in the avoiding groove and is lower than the excircle of the sleeve, the device enters a semi-closed space at one side of the hole along the wall of the volute at the moment, the ejector rod is loosened, the blade is restored to a balanced state under the action of the torsion spring, the rotating handle is pulled outwards, the blade is fully contacted with the hole opening, the handle is rotated immediately, burrs of the whole hole opening are scraped completely by the blade, and the deburring problem of the through hole in the closed or semi-closed space at one side is thoroughly solved.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a device for deburring through holes in a closed or semi-closed space on one side.
Background
As is known, a volute is a common component of equipment manufacturing products, and generally, the volute is provided with a plurality of mutually intersected oil way holes, the mutually intersected oil way holes are in a semi-closed state at one end of an inner cavity outlet, and the depth of the oil way holes exceeds 450 mm. Burrs are generated after a worker drills holes, and the burrs are turned to the inner side, and the burrs cannot be removed by the conventional deburring tool due to the fact that the outer cavity part is semi-closed and cannot enter the deburring tool from the inner cavity.
Therefore, the need of designing a device for removing the burr of the semi-closed deep-cavity hole is needed by those skilled in the art.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a device for deburring through holes in a space with one closed side or a semi-closed side, which solves the problem that burrs of a semi-closed type deep cavity hole cannot be removed in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a device that is used for one side to seal or semi-closed space through-hole burring, the device includes sleeve, blade, ejector pin, compression spring, torsion spring, wherein:
the sleeve is of a hollow thin-wall structure, the front end of the sleeve is provided with a tool rest, the rear end of the sleeve is screwed with a spring pressing cap, the sleeve is provided with an avoiding groove, and the avoiding groove is positioned at the front end of the sleeve;
the ejector rod is positioned in the sleeve and is of a stepped shaft structure and comprises a front ejector rod and a rear ejector rod, the front end of the front ejector rod is provided with an ejector pin, the ejector pin is contacted with the blade, the compression spring is sleeved on the rear ejector rod in a penetrating manner, and the front end and the rear end of the compression spring are respectively contacted with the rear end of the front ejector rod and the front end of the spring pressing cap;
the blade is installed on the frame through a pin shaft, the blade rotates on the pin shaft, the blade is connected with one end of the torsion spring, and the other end of the torsion spring is fixed on the sleeve.
Further, the sleeve is of a circular tubular structure, and the ejector rod is of a cylindrical structure.
Furthermore, a pin hole is formed in the sleeve and is positioned at the rear part of the middle part of the sleeve;
the ejector rod is provided with an anti-rotation groove on the front ejector rod, and the length of the anti-rotation groove is larger than that of the ejector pin.
Further, the device still includes the pin, the pin is installed on the pinhole, just pin lower part card is in prevent revolving in the groove.
Furthermore, the upper end face of the pin is hidden in the pin hole.
Further, the diameter of the front ejector rod is larger than that of the rear ejector rod.
Further, the device also comprises a rotating handle, and the rotating handle is fixed on the rear end of the sleeve.
Furthermore, the device also comprises a stretching handle, and the stretching handle is fixed at the rear ejector rod of the ejector rod.
Further, the material of the blade is cemented carbide TY 15.
(III) advantageous effects
The invention provides a deburring device for a through hole in a closed or semi-closed space on one side, which comprises a sleeve, a blade, an ejector rod, a compression spring and a torsion spring, wherein the sleeve is of a hollow thin-wall structure, the front end of the sleeve is provided with a tool rest, the rear end of the sleeve is screwed with a spring pressing cap, the sleeve is provided with an avoiding groove, and the avoiding groove is positioned at the front end of the sleeve; the ejector rod is positioned in the sleeve and is of a stepped shaft structure and comprises a front ejector rod and a rear ejector rod, the front end of the front ejector rod is provided with an ejector pin, the ejector pin is contacted with the blade, the compression spring is sleeved on the rear ejector rod in a penetrating manner, and the front end and the rear end of the compression spring are respectively contacted with the rear end of the front ejector rod and the front end of the spring pressing cap; the blade is installed on the frame through a pin shaft, the blade rotates on the pin shaft, the blade is connected with one end of the torsion spring, and the other end of the torsion spring is fixed on the sleeve. The structure is characterized in that the ejector rod is pulled outwards, the blade rotates under the action of the torsion spring, the position of the tool nose is located in the avoiding groove and lower than the excircle of the sleeve, the device enters a semi-closed space on one side of the hole along the wall of the volute hole at the moment, the ejector rod is loosened, the blade is restored to a balanced state under the action of the torsion spring, the rotating handle is pulled outwards, the blade is fully contacted with the hole opening, the handle is rotated immediately, burrs of the whole hole opening are scraped completely by the blade, and the deburring problem of through holes in the closed or semi-closed space on one side is thoroughly solved.
Drawings
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
FIG. 1 is a first schematic structural diagram of the apparatus according to a first embodiment;
fig. 2 is a schematic structural diagram of a socket portion in the first embodiment;
illustration of the drawings: 1-a sleeve; 11-a tool holder; 12-a spring press cap; 2-rotating the handle; 3-a top rod; 31-a thimble; 32-anti-rotation grooves; 4-compression spring; 5-a blade; 6-a pin shaft; 7-a torsion spring; 8-pins; 9-stretching the handle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In addition, for the convenience of description, the terms "upper", "lower", "left" and "right" are used to refer to the same direction as the upper, lower, left, right, etc. of the drawings, and the terms "first", "second", etc. are used for descriptive distinction and have no special meaning.
Aiming at the problems in the prior art, the invention provides a device for deburring through holes in a closed or semi-closed space on one side, which comprises a sleeve, a blade, an ejector rod, a compression spring and a torsion spring, wherein:
the sleeve is of a hollow thin-wall structure, the front end of the sleeve is provided with a tool rest, the rear end of the sleeve is screwed with a spring pressing cap, the sleeve is provided with an avoiding groove, and the avoiding groove is positioned at the front end of the sleeve;
the ejector rod is positioned in the sleeve and is of a stepped shaft structure and comprises a front ejector rod and a rear ejector rod, the front end of the front ejector rod is provided with an ejector pin, the ejector pin is contacted with the blade, the compression spring is sleeved on the rear ejector rod in a penetrating manner, and the front end and the rear end of the compression spring are respectively contacted with the rear end of the front ejector rod and the front end of the spring pressing cap;
the blade is installed on the frame through a pin shaft, the blade rotates on the pin shaft, the blade is connected with one end of the torsion spring, and the other end of the torsion spring is fixed on the sleeve.
In a specific application scene, the ejector rod is pulled outwards, the blade rotates under the action of the torsion spring, the position of the tool nose is positioned in the avoiding groove and is lower than the outer circle of the sleeve, and at the moment, the device enters a semi-closed space on one side of the hole along the wall of the volute.
Further, the sleeve is of a circular tubular structure, and the ejector rod is of a cylindrical structure.
Furthermore, a pin hole is formed in the sleeve and is positioned at the rear part of the middle part of the sleeve;
the ejector rod is provided with an anti-rotation groove on the front ejector rod, and the length of the anti-rotation groove is larger than that of the ejector pin.
Further, the device still includes the pin, the pin is installed on the pinhole, just pin lower part card is in prevent revolving in the groove.
In the concrete application scene, through addding the pin, effectively prevent when rotatory sleeve that the ejector pin is along with sleeve autogyration, guaranteed that ejector pin and sleeve are rotatory simultaneously.
Furthermore, the upper end face of the pin is hidden in the pin hole.
In a specific application scene, the upper end face of the pin is hidden in the pin hole, so that the pin is lower than the outer wall of the sleeve, and the pin is prevented from touching the inner wall of the hole cavity to affect deburring during deburring operation.
Further, the diameter of the front ejector rod is larger than that of the rear ejector rod.
Further, the device also comprises a rotating handle, and the rotating handle is fixed on the rear end of the sleeve.
In the concrete application scene, through addding twist grip, make things convenient for the operation sleeve to rotate in the vestibule to make the blade get rid of the burr.
Furthermore, the device also comprises a stretching handle, and the stretching handle is fixed at the rear ejector rod of the ejector rod.
In a specific application scene, the ejector rod is conveniently pulled to move forwards and backwards by additionally arranging the stretching handle, so that the operation of workers is facilitated.
Further, the material of the blade is cemented carbide TY 15.
In a specific application scenario, the material of the blade may be not only cemented carbide TY15, but also other cemented carbide materials, such as YT30 and TY14, and on the premise of not affecting the working performance of the deburring device, which kind of cemented carbide material is specifically adopted may be selected by a person skilled in the art according to actual conditions, and the change of the material of the blade does not affect the protection range of the application.
The operating principle of the deburring device is as follows:
the ejector rod is pulled outwards, the blade rotates under the action of the torsion spring, the position of the tool nose is positioned in the avoiding groove and is lower than the excircle of the sleeve, the device enters a semi-closed space at one side of the hole along the wall of the volute at the moment, the ejector rod is loosened, the blade is restored to a balanced state under the action of the torsion spring, the rotating handle is pulled outwards, the blade is fully contacted with the hole opening, the handle is rotated immediately, burrs of the whole hole opening are scraped completely by the blade, and the deburring problem of the through hole in the closed or semi-closed space at one side is thoroughly solved.
The first embodiment is as follows:
based on the above concept, as shown in fig. 1-2, the device for deburring the through hole of the one-side closed or semi-closed space provided by the invention comprises a sleeve 1, a blade 5, a mandril 3, a compression spring 4 and a torsion spring 7, as shown in fig. 1, wherein:
as shown in fig. 1, the sleeve 1 is a hollow thin-walled structure, the front end of the sleeve 1 is provided with a tool holder 11, the rear end of the sleeve 1 is screwed with a spring pressing cap 12, the sleeve 1 is provided with an avoiding groove, and the avoiding groove is located at the front end of the sleeve 1;
as shown in fig. 1, the ejector rod 3 is located in the sleeve 1, the ejector rod 3 is of a stepped shaft structure and comprises a front ejector rod and a rear ejector rod, a thimble 31 is arranged at the front end of the front ejector rod, the thimble 31 is in contact with the blade 5, the compression spring 4 is sleeved on the rear ejector rod in a penetrating manner, and the front end and the rear end of the compression spring 4 are respectively in contact with the rear end of the front ejector rod and the front end of the spring pressing cap 12;
as shown in fig. 1, the blade 5 is mounted on the frame through a pin 6, the blade 5 rotates on the pin 6, the blade 5 is connected with one end of the torsion spring 7, and the other end of the torsion spring 7 is fixed on the sleeve 1.
Further, as shown in fig. 2, the sleeve 1 is a circular tubular structure, and the ejector rod 3 is a cylindrical structure.
Further, as shown in fig. 1, a pin hole is formed in the sleeve 1, and the pin hole is located at a position behind the middle of the sleeve 1;
the ejector rod 3 is provided with an anti-rotation groove 32 on the front ejector rod, and the length of the anti-rotation groove 32 is greater than that of the ejector pin 31.
Further, as shown in fig. 1, the device further comprises a pin 8, wherein the pin 8 is installed on the pin hole, and the lower part of the pin 8 is clamped in the anti-rotation groove 32.
Further, the upper end face of the pin 8 is hidden in the pin hole.
Further, the diameter of the front ejector rod is larger than that of the rear ejector rod.
Further, as shown in fig. 2, the device further comprises a rotating handle 2, and the rotating handle 2 is fixed on the rear end of the sleeve 1.
Further, as shown in fig. 2, the device further comprises a stretching handle 9, and the stretching handle 9 is fixed at the rear mandril of the mandril 3.
Further, the material of the blade 5 is cemented carbide TY 15.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above disclosure is only a concrete implementation scenario of the present invention, however, the present invention is not limited to this, and any changes that can be made by those skilled in the art should fall into the protection scope of the present invention.
Claims (9)
1. A device that is used for one side to seal or semi-closed space through-hole burring, its characterized in that, the device includes sleeve (1), blade (5), ejector pin (3), compression spring (4), torsion spring (7), wherein:
the sleeve (1) is of a hollow thin-wall structure, a tool rest (11) is arranged at the front end of the sleeve (1), a spring pressing cap (12) is screwed at the rear end of the sleeve (1), an avoiding groove is formed in the sleeve (1), and the avoiding groove is located at the front end of the sleeve (1);
the ejector rod (3) is positioned in the sleeve (1), the ejector rod (3) is of a stepped shaft structure and comprises a front ejector rod and a rear ejector rod, the front end of the front ejector rod is provided with an ejector pin (31), the ejector pin (31) is contacted with the blade (5), the compression spring (4) is sleeved on the rear ejector rod in a penetrating manner, and the front end and the rear end of the compression spring (4) are respectively contacted with the rear end of the front ejector rod and the front end of the spring pressing cap (12);
the blade (5) is installed on the frame through a pin shaft (6), the blade (5) rotates on the pin shaft (6), one end of the torsional spring (7) is connected with the blade (5), and the other end of the torsional spring (7) is fixed on the sleeve (1).
2. Device for deburring through holes in a closed or semi-closed space on one side according to claim 1, characterized in that the sleeve (1) is of a circular tubular structure and the ejector rod (3) is of a cylindrical structure.
3. The device for deburring the through hole in the space with one side closed or semi-closed space as claimed in claim 2, wherein the sleeve (1) is provided with a pin hole which is positioned at the rear part of the middle part of the sleeve (1);
the ejector rod (3) is provided with a rotation-preventing groove (32) on the front ejector rod, and the length of the rotation-preventing groove (32) is greater than that of the ejector pin (31).
4. The device for deburring through holes of one-side closed or semi-closed spaces as claimed in claim 3, further comprising a pin (8), wherein the pin (8) is installed on the pin hole, and the lower part of the pin (8) is clamped in the anti-rotation groove (32).
5. Device for deburring through holes in one-sided closed or semi-closed spaces as claimed in claim 4, characterized in that the upper end face of the pin (8) is hidden in the pin hole.
6. The apparatus for deburring one-sided closed or semi-closed space through-holes as claimed in claim 1, wherein the diameter of said front pin is larger than the diameter of said rear pin.
7. Device for deburring through holes in one or more closed or semi-closed spaces according to claim 1, characterized in that it further comprises a rotating handle (2), said rotating handle (2) being fixed to the rear end of said sleeve (1).
8. A device for deburring through holes of one-side closed or semi-closed spaces as claimed in claim 1, characterized by further comprising a stretching handle (9), wherein the stretching handle (9) is fixed at the rear mandril of the mandril (3).
9. Device for deburring through holes in one or more closed or semi-closed spaces according to claim 1, characterized in that the material of the blade (5) is cemented carbide TY 15.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011240938.2A CN112404598A (en) | 2020-11-09 | 2020-11-09 | Deburring device for through hole of one-side closed or semi-closed space |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011240938.2A CN112404598A (en) | 2020-11-09 | 2020-11-09 | Deburring device for through hole of one-side closed or semi-closed space |
Publications (1)
Publication Number | Publication Date |
---|---|
CN112404598A true CN112404598A (en) | 2021-02-26 |
Family
ID=74780845
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202011240938.2A Pending CN112404598A (en) | 2020-11-09 | 2020-11-09 | Deburring device for through hole of one-side closed or semi-closed space |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112404598A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113510313A (en) * | 2021-07-13 | 2021-10-19 | 贵州航天电器股份有限公司 | Indexable deburring cutter for inner wall cross orifices |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0818264A1 (en) * | 1996-07-11 | 1998-01-14 | SOCIETE NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION -Snecma | Tool and method for deburring |
CN103008791A (en) * | 2012-12-07 | 2013-04-03 | 上海锅炉厂有限公司 | Multilevel-positioning scraping plate of rotary cutter |
CN202922040U (en) * | 2012-11-21 | 2013-05-08 | 铜陵市永生机电制造有限责任公司 | Tool for removing burrs at bottom of deep blind hole |
CN103692024A (en) * | 2013-12-12 | 2014-04-02 | 湖南特力液压有限公司 | Burr removing device in through hole |
CN111774619A (en) * | 2020-07-29 | 2020-10-16 | 无锡浩普科技有限公司 | Deburring cutter |
-
2020
- 2020-11-09 CN CN202011240938.2A patent/CN112404598A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0818264A1 (en) * | 1996-07-11 | 1998-01-14 | SOCIETE NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION -Snecma | Tool and method for deburring |
CN202922040U (en) * | 2012-11-21 | 2013-05-08 | 铜陵市永生机电制造有限责任公司 | Tool for removing burrs at bottom of deep blind hole |
CN103008791A (en) * | 2012-12-07 | 2013-04-03 | 上海锅炉厂有限公司 | Multilevel-positioning scraping plate of rotary cutter |
CN103692024A (en) * | 2013-12-12 | 2014-04-02 | 湖南特力液压有限公司 | Burr removing device in through hole |
CN111774619A (en) * | 2020-07-29 | 2020-10-16 | 无锡浩普科技有限公司 | Deburring cutter |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113510313A (en) * | 2021-07-13 | 2021-10-19 | 贵州航天电器股份有限公司 | Indexable deburring cutter for inner wall cross orifices |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101455582B1 (en) | Chip suction solid drill | |
CN112404598A (en) | Deburring device for through hole of one-side closed or semi-closed space | |
CN108889985B (en) | A kind of processing method for the big anti-hole of interlayer blind hole structure of aircraft | |
US2302853A (en) | Speed change gear unit | |
DE102011114412A1 (en) | Device for drilling bores in workpiece, has inner tool that is provided with rotating unit for adjusting size and shape of chips | |
CN207326027U (en) | A Drilling Machine That Can Reduce the Resistance of Drilling Large Holes | |
EP1466686A3 (en) | A cutting plate for a drill bit | |
CN205733149U (en) | A kind of drill bit | |
CN211681554U (en) | Honing head for parallel notch hole | |
CN204486955U (en) | Tapering extrudes left tooth screw tap | |
CN210789372U (en) | Anti-breaking lengthened twist drill | |
CN203578865U (en) | Anti-vibration U drill | |
CN113909530A (en) | Tool for removing burrs of inner wall hole of waveguide tube | |
CN219582285U (en) | Angle head for small-aperture machining | |
CN2138542Y (en) | Multipurpose fast changing tool clipper | |
JP5090297B2 (en) | Machining tool with fluid supply hole | |
DE102009001950B4 (en) | Tool head as well as sculptor and grinding tool with multiple function | |
CN217965101U (en) | Staggered tooth type welding alloy step dense tooth reamer | |
CN221735370U (en) | Chamfering device integrating drilling and polishing | |
CN217253342U (en) | Combined chamfering device | |
CN220372392U (en) | NPT thread milling cutter | |
EP1747082B1 (en) | Machine tool | |
CN221220368U (en) | Combined drilling tool | |
CN218799577U (en) | External cooling reamer | |
CN214445439U (en) | Device for blanking of drill tool |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210226 |